Merge https://github.com/YosysHQ/yosys into read_aiger

.github/issue_template.md

@@ -4,6 +4,17 @@
 all necessary source files. (You can simply drag&drop a .zip file into
 the issue editor.)*
 
+Also, make sure that the issue is actually reproducable in current git
+master of Yosys.
+
+See https://stackoverflow.com/help/mcve for some information on how to
+create a Minimal, Complete, and Verifiable example (MCVE).
+
+Please do not waste our time with issues that lack sufficient information
+to reproduce the issue easily. We will simply close those issues.
+
+Contact https://www.symbioticeda.com/ if you need commercial support for Yosys.
+
 ## Expected behavior
 
 *Please describe the behavior you would have expected from the tool.*
@@ -11,6 +22,3 @@ the issue editor.)*
 ## Actual behavior
 
 *Please describe how the behavior you see differs from the expected behavior.*
-
-**Important Note:** Nobody will be able to help you and/or fix the issue if you
-do not provide sufficient information for reproducing the problem.

.gitignore

@@ -24,6 +24,8 @@
 /yosys-abc.exe
 /yosys-config
 /yosys-smtbmc
+/yosys-smtbmc.exe
+/yosys-smtbmc-script.py
 /yosys-filterlib
 /yosys-filterlib.exe
 /kernel/version_*.cc

.travis.yml

@@ -132,11 +132,11 @@ matrix:
       env:
         - MATRIX_EVAL="CONFIG=clang && CC=clang-5.0 && CXX=clang++-5.0"
 
-    # Latest clang on Mac OS X
+#   # Latest clang on Mac OS X
-    - os: osx
+#   - os: osx
-      osx_image: xcode9.4
+#     osx_image: xcode9.4
-      env:
+#     env:
-        - MATRIX_EVAL="CONFIG=clang && CC=clang && CXX=clang++"
+#       - MATRIX_EVAL="CONFIG=clang && CC=clang && CXX=clang++"
 
 before_install:
   - ./.travis/setup.sh

.travis/build-and-test.sh

@@ -36,6 +36,8 @@ echo
 
 ##########################################################################
 
+./yosys tests/simple/fiedler-cooley.v
+
 echo
 echo 'Testing...' && echo -en 'travis_fold:start:script.test\\r'
 echo

.travis/setup.sh

@@ -6,48 +6,15 @@ source .travis/common.sh
 
 ##########################################################################
 
-# Fixing Travis's git clone
-echo
-echo 'Fixing git setup...' && echo -en 'travis_fold:start:before_install.git\\r'
-echo
-git fetch --unshallow && git fetch --tags
-
-# For pull requests, we get more info about the git source.
-if [ z"$TRAVIS_PULL_REQUEST_SLUG" != z ]; then
-	echo "- Fetching from pull request source"
-	git remote add source https://github.com/$TRAVIS_PULL_REQUEST_SLUG.git
-	git fetch source && git fetch --tags
-
-	echo "- Fetching the actual pull request"
-	git fetch origin pull/$TRAVIS_PULL_REQUEST/head:pull-$TRAVIS_PULL_REQUEST-head
-	git fetch origin pull/$TRAVIS_PULL_REQUEST/merge:pull-$TRAVIS_PULL_REQUEST-merge
-
-	git log -n 5 --graph pull-$TRAVIS_PULL_REQUEST-merge
-fi
-
-# For building branches we need to fix the "detached head" state.
-if [ z"$TRAVIS_BRANCH" != z ]; then
-	TRAVIS_COMMIT_ACTUAL=$(git log --pretty=format:'%H' -n 1)
-	echo "- Fixing detached head (current $TRAVIS_COMMIT_ACTUAL -> $TRAVIS_COMMIT)"
-	git remote -v
-	git branch -v
-	if [ x"$(git show-ref -s HEAD)" = x"$TRAVIS_COMMIT" ]; then
-		echo "Checked out at $TRAVIS_COMMIT"
-	else
-		if [ z"$TRAVIS_PULL_REQUEST_SLUG" != z ]; then
-			git fetch source $TRAVIS_COMMIT || echo "Unable to fetch $TRAVIS_COMMIT from source"
-		fi
-		git fetch origin $TRAVIS_COMMIT || echo "Unable to fetch $TRAVIS_COMMIT from origin"
-	fi
-	git branch -D $TRAVIS_BRANCH || true
-	git checkout $TRAVIS_COMMIT -b $TRAVIS_BRANCH
-	git branch -v
-fi
-
 # Output status information.
+(
+	set +e
+	set -x
 	git status
-git describe --tags
+	git branch -v
 	git log -n 5 --graph
+	git log --format=oneline -n 20 --graph
+)
 echo
 echo -en 'travis_fold:end:before_install.git\\r'
 echo

Makefile

@@ -10,6 +10,7 @@ CONFIG := clang
 # features (the more the better)
 ENABLE_TCL := 1
 ENABLE_ABC := 1
+ENABLE_GLOB := 1
 ENABLE_PLUGINS := 1
 ENABLE_READLINE := 1
 ENABLE_EDITLINE := 0
@@ -100,7 +101,7 @@ LDFLAGS += -rdynamic
 LDLIBS += -lrt
 endif
 
-YOSYS_VER := 0.8+$(shell cd $(YOSYS_SRC) && test -e .git && { git log --author=clifford@clifford.at --oneline 4d4665b.. | wc -l; })
+YOSYS_VER := 0.8+$(shell cd $(YOSYS_SRC) && test -e .git && { git log --author=clifford@clifford.at --oneline 4d4665b.. 2> /dev/null | wc -l; })
 GIT_REV := $(shell cd $(YOSYS_SRC) && git rev-parse --short HEAD 2> /dev/null || echo UNKNOWN)
 OBJS = kernel/version_$(GIT_REV).o
 
@@ -298,6 +299,10 @@ LDLIBS += -ldl
 endif
 endif
 
+ifeq ($(ENABLE_GLOB),1)
+CXXFLAGS += -DYOSYS_ENABLE_GLOB
+endif
+
 ifeq ($(ENABLE_TCL),1)
 TCL_VERSION ?= tcl$(shell bash -c "tclsh <(echo 'puts [info tclversion]')")
 ifeq ($(OS), FreeBSD)
@@ -570,7 +575,7 @@ test: $(TARGETS) $(EXTRA_TARGETS)
 	+cd tests/simple && bash run-test.sh $(SEEDOPT)
 	+cd tests/hana && bash run-test.sh $(SEEDOPT)
 	+cd tests/asicworld && bash run-test.sh $(SEEDOPT)
-	+cd tests/realmath && bash run-test.sh $(SEEDOPT)
+	# +cd tests/realmath && bash run-test.sh $(SEEDOPT)
 	+cd tests/share && bash run-test.sh $(SEEDOPT)
 	+cd tests/fsm && bash run-test.sh $(SEEDOPT)
 	+cd tests/techmap && bash run-test.sh

README.md

@@ -34,11 +34,24 @@ compatible license that is similar in terms to the MIT license
 or the 2-clause BSD license).
 
 
-Web Site
+Web Site and Other Resources
-========
+============================
 
 More information and documentation can be found on the Yosys web site:
-http://www.clifford.at/yosys/
+- http://www.clifford.at/yosys/
+
+The "Documentation" page on the web site contains links to more resources,
+including a manual that even describes some of the Yosys internals:
+- http://www.clifford.at/yosys/documentation.html
+
+The file `CodingReadme` in this directory contains additional information
+for people interested in using the Yosys C++ APIs.
+
+Users interested in formal verification might want to use the formal verification
+front-end for Yosys, SymbiYosys:
+- https://symbiyosys.readthedocs.io/en/latest/
+- https://github.com/YosysHQ/SymbiYosys
+
 
 Setup
 ======
@@ -92,12 +105,15 @@ Makefile.
 To build Yosys simply type 'make' in this directory.
 
 	$ make
-	$ make test
 	$ sudo make install
 
 Note that this also downloads, builds and installs ABC (using yosys-abc
 as executable name).
 
+Tests are located in the tests subdirectory and can be executed using the test target. Note that you need gawk as well as a recent version of iverilog (i.e. build from git). Then, execute tests via:
+
+	$ make test
+
 Getting Started
 ===============
 
@@ -296,6 +312,9 @@ Verilog Attributes and non-standard features
   passes to identify input and output ports of cells. The Verilog backend
   also does not output blackbox modules on default.
 
+- The ``dynports'' attribute is used by the Verilog front-end to mark modules
+  that have ports with a width that depends on a parameter.
+
 - The ``keep`` attribute on cells and wires is used to mark objects that should
   never be removed by the optimizer. This is used for example for cells that
   have hidden connections that are not part of the netlist, such as IO pads.

backends/edif/edif.cc

@@ -130,7 +130,7 @@ struct EdifBackend : public Backend {
 		bool port_rename = false;
 		bool attr_properties = false;
 		std::map<RTLIL::IdString, std::map<RTLIL::IdString, int>> lib_cell_ports;
-		bool nogndvcc = false, gndvccy = true;
+		bool nogndvcc = false, gndvccy = false;
 		CellTypes ct(design);
 		EdifNames edif_names;
 

backends/firrtl/firrtl.cc

@@ -165,11 +165,9 @@ struct FirrtlWorker
 
 	std::string fid(RTLIL::IdString internal_id)
 	{
-		const char *str = internal_id.c_str();
+		return make_id(internal_id);
-		return *str == '\\' ? str + 1 : str;
 	}
 
-
 	std::string cellname(RTLIL::Cell *cell)
 	{
 		return fid(cell->name).c_str();
@@ -219,29 +217,42 @@ struct FirrtlWorker
 			if (it->second.size() > 0) {
 				const SigSpec &secondSig = it->second;
 				const std::string firstName = cell_name + "." + make_id(it->first);
-				const std::string secondName = make_expr(secondSig);
+				const std::string secondExpr = make_expr(secondSig);
 				// Find the direction for this port.
 				FDirection dir = getPortFDirection(it->first, instModule);
-				std::string source, sink;
+				std::string sourceExpr, sinkExpr;
+				const SigSpec *sinkSig = nullptr;
 				switch (dir) {
 					case FD_INOUT:
 						log_warning("Instance port connection %s.%s is INOUT; treating as OUT\n", cell_type.c_str(), log_signal(it->second));
 					case FD_OUT:
-						source = firstName;
+						sourceExpr = firstName;
-						sink = secondName;
+						sinkExpr = secondExpr;
+						sinkSig = &secondSig;
 						break;
 					case FD_NODIRECTION:
 						log_warning("Instance port connection %s.%s is NODIRECTION; treating as IN\n", cell_type.c_str(), log_signal(it->second));
 						/* FALL_THROUGH */
 					case FD_IN:
-						source = secondName;
+						sourceExpr = secondExpr;
-						sink = firstName;
+						sinkExpr = firstName;
 						break;
 					default:
 						log_error("Instance port %s.%s unrecognized connection direction 0x%x !\n", cell_type.c_str(), log_signal(it->second), dir);
 						break;
 				}
-				wire_exprs.push_back(stringf("\n%s%s <= %s", indent.c_str(), sink.c_str(), source.c_str()));
+				// Check for subfield assignment.
+				std::string bitsString = "bits(";
+				if (sinkExpr.substr(0, bitsString.length()) == bitsString ) {
+					if (sinkSig == nullptr)
+						log_error("Unknown subfield %s.%s\n", cell_type.c_str(), sinkExpr.c_str());
+					// Don't generate the assignment here.
+					// Add the source and sink to the "reverse_wire_map" and we'll output the assignment
+					//  as part of the coalesced subfield assignments for this wire.
+					register_reverse_wire_map(sourceExpr, *sinkSig);
+				} else {
+					wire_exprs.push_back(stringf("\n%s%s <= %s", indent.c_str(), sinkExpr.c_str(), sourceExpr.c_str()));
+				}
 			}
 		}
 		wire_exprs.push_back(stringf("\n"));

backends/smt2/Makefile.inc

@@ -3,14 +3,30 @@ OBJS += backends/smt2/smt2.o
 
 ifneq ($(CONFIG),mxe)
 ifneq ($(CONFIG),emcc)
+
+# MSYS targets support yosys-smtbmc, but require a launcher script
+ifeq ($(CONFIG),$(filter $(CONFIG),msys2 msys2-64))
+TARGETS += yosys-smtbmc.exe yosys-smtbmc-script.py
+# Needed to find the Python interpreter for yosys-smtbmc scripts.
+# Override if necessary, it is only used for msys2 targets.
+PYTHON := $(shell cygpath -w -m $(PREFIX)/bin/python3)
+
+yosys-smtbmc-script.py: backends/smt2/smtbmc.py
+	$(P) sed -e 's|##yosys-sys-path##|sys.path += [os.path.dirname(os.path.realpath(__file__)) + p for p in ["/share/python3", "/../share/yosys/python3"]]|;' \
+		-e "s|#!/usr/bin/env python3|#!$(PYTHON)|" < $< > $@
+
+yosys-smtbmc.exe: misc/launcher.c yosys-smtbmc-script.py
+	$(P) gcc -DGUI=0 -O -s -o $@ $<
+# Other targets
+else
 TARGETS += yosys-smtbmc
 
 yosys-smtbmc: backends/smt2/smtbmc.py
 	$(P) sed 's|##yosys-sys-path##|sys.path += [os.path.dirname(os.path.realpath(__file__)) + p for p in ["/share/python3", "/../share/yosys/python3"]]|;' < $< > $@.new
 	$(Q) chmod +x $@.new
 	$(Q) mv $@.new $@
+endif
 
 $(eval $(call add_share_file,share/python3,backends/smt2/smtio.py))
 endif
 endif
-

backends/smt2/smt2.cc

@@ -416,6 +416,7 @@ struct Smt2Worker
 		for (char ch : expr) {
 			if (ch == 'A') processed_expr += get_bv(sig_a);
 			else if (ch == 'B') processed_expr += get_bv(sig_b);
+			else if (ch == 'P') processed_expr += get_bv(cell->getPort("\\B"));
 			else if (ch == 'L') processed_expr += is_signed ? "a" : "l";
 			else if (ch == 'U') processed_expr += is_signed ? "s" : "u";
 			else processed_expr += ch;
@@ -554,7 +555,7 @@ struct Smt2Worker
 
 			if (cell->type.in("$shift", "$shiftx")) {
 				if (cell->getParam("\\B_SIGNED").as_bool()) {
-					return export_bvop(cell, stringf("(ite (bvsge B #b%0*d) "
+					return export_bvop(cell, stringf("(ite (bvsge P #b%0*d) "
 							"(bvlshr A B) (bvlshr A (bvneg B)))",
 							GetSize(cell->getPort("\\B")), 0), 's');
 				} else {
@@ -887,8 +888,8 @@ struct Smt2Worker
 
 				string name_a = get_bool(cell->getPort("\\A"));
 				string name_en = get_bool(cell->getPort("\\EN"));
-				decls.push_back(stringf("; yosys-smt2-%s %d %s\n", cell->type.c_str() + 1, id,
+				string infostr = (cell->name[0] == '$' && cell->attributes.count("\\src")) ? cell->attributes.at("\\src").decode_string() : get_id(cell);
-						cell->attributes.count("\\src") ? cell->attributes.at("\\src").decode_string().c_str() : get_id(cell)));
+				decls.push_back(stringf("; yosys-smt2-%s %d %s\n", cell->type.c_str() + 1, id, infostr.c_str()));
 
 				if (cell->type == "$cover")
 					decls.push_back(stringf("(define-fun |%s_%c %d| ((state |%s_s|)) Bool (and %s %s)) ; %s\n",
@@ -1103,20 +1104,27 @@ struct Smt2Worker
 							break;
 
 						Const initword = init_data.extract(i*width, width, State::Sx);
+						Const initmask = initword;
 						bool gen_init_constr = false;
 
-						for (auto bit : initword.bits)
+						for (int k = 0; k < GetSize(initword); k++) {
-							if (bit == State::S0 || bit == State::S1)
+							if (initword[k] == State::S0 || initword[k] == State::S1) {
 								gen_init_constr = true;
+								initmask[k] = State::S1;
+							} else {
+								initmask[k] = State::S0;
+								initword[k] = State::S0;
+							}
+						}
 
 						if (gen_init_constr)
 						{
 							if (statebv)
 								/* FIXME */;
 							else
-								init_list.push_back(stringf("(= (select (|%s#%d#0| state) #b%s) #b%s) ; %s[%d]",
+								init_list.push_back(stringf("(= (bvand (select (|%s#%d#0| state) #b%s) #b%s) #b%s) ; %s[%d]",
 										get_id(module), arrayid, Const(i, abits).as_string().c_str(),
-										initword.as_string().c_str(), get_id(cell), i));
+										initmask.as_string().c_str(), initword.as_string().c_str(), get_id(cell), i));
 						}
 					}
 				}

backends/verilog/verilog_backend.cc

@@ -33,7 +33,7 @@
 USING_YOSYS_NAMESPACE
 PRIVATE_NAMESPACE_BEGIN
 
-bool verbose, norename, noattr, attr2comment, noexpr, nodec, nohex, nostr, defparam, decimal;
+bool verbose, norename, noattr, attr2comment, noexpr, nodec, nohex, nostr, defparam, decimal, siminit;
 int auto_name_counter, auto_name_offset, auto_name_digits;
 std::map<RTLIL::IdString, int> auto_name_map;
 std::set<RTLIL::IdString> reg_wires, reg_ct;
@@ -1310,7 +1310,7 @@ void dump_cell(std::ostream &f, std::string indent, RTLIL::Cell *cell)
 		}
 	}
 
-	if (reg_ct.count(cell->type) && cell->hasPort("\\Q")) {
+	if (siminit && reg_ct.count(cell->type) && cell->hasPort("\\Q")) {
 		std::stringstream ss;
 		dump_reg_init(ss, cell->getPort("\\Q"));
 		if (!ss.str().empty()) {
@@ -1607,6 +1607,10 @@ struct VerilogBackend : public Backend {
 		log("        without this option all internal cells are converted to Verilog\n");
 		log("        expressions.\n");
 		log("\n");
+		log("    -siminit\n");
+		log("        add initial statements with hierarchical refs to initialize FFs when\n");
+		log("        in -noexpr mode.\n");
+		log("\n");
 		log("    -nodec\n");
 		log("        32-bit constant values are by default dumped as decimal numbers,\n");
 		log("        not bit pattern. This option deactivates this feature and instead\n");
@@ -1663,11 +1667,14 @@ struct VerilogBackend : public Backend {
 		nostr = false;
 		defparam = false;
 		decimal = false;
+		siminit = false;
 		auto_prefix = "";
 
 		bool blackboxes = false;
 		bool selected = false;
 
+		auto_name_map.clear();
+		reg_wires.clear();
 		reg_ct.clear();
 
 		reg_ct.insert("$dff");
@@ -1739,6 +1746,10 @@ struct VerilogBackend : public Backend {
 				decimal = true;
 				continue;
 			}
+			if (arg == "-siminit") {
+				siminit = true;
+				continue;
+			}
 			if (arg == "-blackboxes") {
 				blackboxes = true;
 				continue;
@@ -1770,6 +1781,8 @@ struct VerilogBackend : public Backend {
 			dump_module(*f, "", it->second);
 		}
 
+		auto_name_map.clear();
+		reg_wires.clear();
 		reg_ct.clear();
 	}
 } VerilogBackend;

examples/anlogic/.gitignore

@@ -0,0 +1,7 @@
+demo.bit
+demo_phy.area
+full.v
+*.log
+*.h
+*.tde
+*.svf

examples/anlogic/README

@@ -0,0 +1,12 @@
+LED Blink project for Anlogic Lichee Tang board.
+
+Follow the install instructions for the Tang Dynasty IDE from given link below.
+
+https://tang.sipeed.com/en/getting-started/installing-td-ide/linux/
+
+
+set TD_HOME env variable to the full path to the TD <TD Install Directory> as follow.
+
+export TD_HOME=<TD Install Directory>
+
+then run "bash build.sh" in this directory.

examples/anlogic/build.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+set -ex
+yosys demo.ys
+$TD_HOME/bin/td build.tcl

examples/anlogic/build.tcl

@@ -0,0 +1,11 @@
+import_device eagle_s20.db -package BG256
+read_verilog full.v -top demo
+read_adc demo.adc
+optimize_rtl
+map_macro
+map
+pack
+place
+route
+report_area -io_info -file demo_phy.area
+bitgen -bit demo.bit -version 0X0000 -svf demo.svf -svf_comment_on -g ucode:00000000000000000000000000000000

examples/anlogic/demo.adc

@@ -0,0 +1,2 @@
+set_pin_assignment {CLK_IN} { LOCATION = K14;  } ##24MHZ
+set_pin_assignment {R_LED} { LOCATION = R3;  } ##R_LED

examples/anlogic/demo.v

@@ -0,0 +1,18 @@
+module demo (
+    input wire CLK_IN,
+    output wire R_LED
+);
+    parameter time1 = 30'd12_000_000;
+    reg led_state;
+    reg [29:0] count;
+
+    always @(posedge CLK_IN)begin
+        if(count == time1)begin
+            count<= 30'd0;
+            led_state <= ~led_state;
+        end
+        else
+            count <= count + 1'b1;
+    end
+    assign R_LED = led_state;
+endmodule

examples/anlogic/demo.ys

@@ -0,0 +1,3 @@
+read_verilog demo.v
+synth_anlogic -top demo
+write_verilog full.v

examples/igloo2/.gitignore

@@ -1,3 +1,4 @@
 /netlist.edn
 /netlist.vm
+/example.stp
 /proj

examples/igloo2/example.pdc

@@ -1 +1,20 @@
 # Add placement constraints here
+
+set_io clk  -pinname H16 -fixed yes -DIRECTION INPUT
+
+set_io SW1  -pinname H12 -fixed yes -DIRECTION INPUT
+set_io SW2  -pinname H13 -fixed yes -DIRECTION INPUT
+
+set_io LED1 -pinname J16 -fixed yes -DIRECTION OUTPUT
+set_io LED2 -pinname M16 -fixed yes -DIRECTION OUTPUT
+set_io LED3 -pinname K16 -fixed yes -DIRECTION OUTPUT
+set_io LED4 -pinname N16 -fixed yes -DIRECTION OUTPUT
+
+set_io AA   -pinname L12 -fixed yes -DIRECTION OUTPUT
+set_io AB   -pinname L13 -fixed yes -DIRECTION OUTPUT
+set_io AC   -pinname M13 -fixed yes -DIRECTION OUTPUT
+set_io AD   -pinname N15 -fixed yes -DIRECTION OUTPUT
+set_io AE   -pinname L11 -fixed yes -DIRECTION OUTPUT
+set_io AF   -pinname L14 -fixed yes -DIRECTION OUTPUT
+set_io AG   -pinname N14 -fixed yes -DIRECTION OUTPUT
+set_io CA   -pinname M15 -fixed yes -DIRECTION OUTPUT

examples/igloo2/example.sdc

@@ -1 +1,2 @@
 # Add timing constraints here
+create_clock -period 10.000 -waveform {0.000 5.000} [get_ports {clk}]

examples/igloo2/example.v

@@ -1,23 +1,64 @@
 module example (
 	input  clk,
-	input  EN,
+	input  SW1,
+	input  SW2,
 	output LED1,
 	output LED2,
 	output LED3,
 	output LED4,
-	output LED5
+
+	output AA, AB, AC, AD,
+	output AE, AF, AG, CA
 );
 
-	localparam BITS = 5;
+	localparam BITS = 8;
 	localparam LOG2DELAY = 22;
 
 	reg [BITS+LOG2DELAY-1:0] counter = 0;
 	reg [BITS-1:0] outcnt;
 
 	always @(posedge clk) begin
-		counter <= counter + EN;
+		counter <= counter + SW1 + SW2 + 1;
 		outcnt <= counter >> LOG2DELAY;
 	end
 
-	assign {LED1, LED2, LED3, LED4, LED5} = outcnt ^ (outcnt >> 1);
+	assign {LED1, LED2, LED3, LED4} = outcnt ^ (outcnt >> 1);
+
+	// assign CA = counter[10];
+	// seg7enc seg7encinst (
+	// 	.seg({AA, AB, AC, AD, AE, AF, AG}),
+	// 	.dat(CA ? outcnt[3:0] : outcnt[7:4])
+	// );
+
+	assign {AA, AB, AC, AD, AE, AF, AG} = ~(7'b 100_0000 >> outcnt[6:4]);
+	assign CA = outcnt[7];
+endmodule
+
+module seg7enc (
+	input [3:0] dat,
+	output [6:0] seg
+);
+	reg [6:0] seg_inv;
+	always @* begin
+		seg_inv = 0;
+		case (dat)
+			4'h0: seg_inv = 7'b 0111111;
+			4'h1: seg_inv = 7'b 0000110;
+			4'h2: seg_inv = 7'b 1011011;
+			4'h3: seg_inv = 7'b 1001111;
+			4'h4: seg_inv = 7'b 1100110;
+			4'h5: seg_inv = 7'b 1101101;
+			4'h6: seg_inv = 7'b 1111101;
+			4'h7: seg_inv = 7'b 0000111;
+			4'h8: seg_inv = 7'b 1111111;
+			4'h9: seg_inv = 7'b 1101111;
+			4'hA: seg_inv = 7'b 1110111;
+			4'hB: seg_inv = 7'b 1111100;
+			4'hC: seg_inv = 7'b 0111001;
+			4'hD: seg_inv = 7'b 1011110;
+			4'hE: seg_inv = 7'b 1111001;
+			4'hF: seg_inv = 7'b 1110001;
+		endcase
+	end
+	assign seg = ~seg_inv;
 endmodule

examples/igloo2/libero.tcl

@@ -8,13 +8,14 @@ new_project \
     -block_mode 0 \
     -hdl "VERILOG" \
     -family IGLOO2 \
-    -die PA4MGL500 \
+    -die PA4MGL2500 \
-    -package tq144 \
+    -package vf256 \
     -speed -1
 
 import_files -hdl_source {netlist.vm}
 import_files -sdc {example.sdc}
 import_files -io_pdc {example.pdc}
+build_design_hierarchy
 set_option -synth 0
 
 organize_tool_files -tool PLACEROUTE \
@@ -32,22 +33,25 @@ configure_tool -name PLACEROUTE \
     -params EFFORT_LEVEL:false \
     -params REPAIR_MIN_DELAY:false
 
+puts ""
 puts "**> COMPILE"
 run_tool -name {COMPILE}
 puts "<** COMPILE"
 
+puts ""
 puts "**> PLACEROUTE"
 run_tool -name {PLACEROUTE}
 puts "<** PLACEROUTE"
 
+puts ""
 puts "**> VERIFYTIMING"
 run_tool -name {VERIFYTIMING}
 puts "<** VERIFYTIMING"
 
-save_project
+puts ""
-
+puts "**> BITSTREAM"
-# puts "**> export_bitstream"
+export_bitstream_file -trusted_facility_file 1 -trusted_facility_file_components {FABRIC}
-# export_bitstream_file -trusted_facility_file 1 -trusted_facility_file_components {FABRIC}
+puts "<** BITSTREAM"
-# puts "<** export_bitstream"
 
+puts ""
 exit 0

examples/igloo2/runme.sh

@@ -1,4 +1,6 @@
 #!/bin/bash
 set -ex
 yosys -p 'synth_sf2 -top example -edif netlist.edn -vlog netlist.vm' example.v
-LM_LICENSE_FILE=1702@`hostname` /opt/microsemi/Libero_SoC_v11.9/Libero/bin/libero SCRIPT:libero.tcl
+export LM_LICENSE_FILE=${LM_LICENSE_FILE:-1702@localhost}
+/opt/microsemi/Libero_SoC_v12.0/Libero/bin/libero SCRIPT:libero.tcl
+cp proj/designer/example/export/example.stp .

frontends/ast/ast.h

@@ -214,6 +214,8 @@ namespace AST
 			MEM2REG_FL_SET_ASYNC = 0x00000800,
 			MEM2REG_FL_EQ2       = 0x00001000,
 			MEM2REG_FL_CMPLX_LHS = 0x00002000,
+			MEM2REG_FL_CONST_LHS = 0x00004000,
+			MEM2REG_FL_VAR_LHS   = 0x00008000,
 
 			/* proc flags */
 			MEM2REG_FL_EQ1       = 0x01000000,
@@ -237,6 +239,7 @@ namespace AST
 		bool has_const_only_constructs(bool &recommend_const_eval);
 		void replace_variables(std::map<std::string, varinfo_t> &variables, AstNode *fcall);
 		AstNode *eval_const_function(AstNode *fcall);
+		bool is_simple_const_expr();
 
 		// create a human-readable text representation of the AST (for debugging)
 		void dumpAst(FILE *f, std::string indent) const;

frontends/ast/genrtlil.cc

@@ -525,7 +525,16 @@ struct AST_INTERNAL::ProcessGenerator
 				}
 
 				if (last_generated_case != NULL && ast->get_bool_attribute("\\full_case") && default_case == NULL) {
+			#if 0
+					// this is a valid transformation, but as optimization it is premature.
+					// better: add a default case that assigns 'x' to everything, and let later
+					// optimizations take care of the rest
 					last_generated_case->compare.clear();
+			#else
+					default_case = new RTLIL::CaseRule;
+					addChunkActions(default_case->actions, this_case_eq_ltemp, SigSpec(State::Sx, GetSize(this_case_eq_rvalue)));
+					sw->cases.push_back(default_case);
+			#endif
 				} else {
 					if (default_case == NULL) {
 						default_case = new RTLIL::CaseRule;
@@ -544,7 +553,11 @@ struct AST_INTERNAL::ProcessGenerator
 			break;
 
 		case AST_WIRE:
-			log_file_error(ast->filename, ast->linenum, "Found wire declaration in block without label!\n");
+			log_file_error(ast->filename, ast->linenum, "Found reg declaration in block without label!\n");
+			break;
+
+		case AST_ASSIGN:
+			log_file_error(ast->filename, ast->linenum, "Found continous assignment in always/initial block!\n");
 			break;
 
 		case AST_PARAMETER:
@@ -644,7 +657,7 @@ void AstNode::detectSignWidthWorker(int &width_hint, bool &sign_hint, bool *foun
 				while (right_at_zero_ast->simplify(true, true, false, 1, -1, false, false)) { }
 				if (left_at_zero_ast->type != AST_CONSTANT || right_at_zero_ast->type != AST_CONSTANT)
 					log_file_error(filename, linenum, "Unsupported expression on dynamic range select on signal `%s'!\n", str.c_str());
-				this_width = left_at_zero_ast->integer - right_at_zero_ast->integer + 1;
+				this_width = abs(int(left_at_zero_ast->integer - right_at_zero_ast->integer)) + 1;
 				delete left_at_zero_ast;
 				delete right_at_zero_ast;
 			} else
@@ -792,7 +805,7 @@ void AstNode::detectSignWidthWorker(int &width_hint, bool &sign_hint, bool *foun
 	// everything should have been handled above -> print error if not.
 	default:
 		for (auto f : log_files)
-			current_ast->dumpAst(f, "verilog-ast> ");
+			current_ast_mod->dumpAst(f, "verilog-ast> ");
 		log_file_error(filename, linenum, "Don't know how to detect sign and width for %s node!\n", type2str(type).c_str());
 	}
 
@@ -1034,7 +1047,7 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint)
 					while (right_at_zero_ast->simplify(true, true, false, 1, -1, false, false)) { }
 					if (left_at_zero_ast->type != AST_CONSTANT || right_at_zero_ast->type != AST_CONSTANT)
 						log_file_error(filename, linenum, "Unsupported expression on dynamic range select on signal `%s'!\n", str.c_str());
-					int width = left_at_zero_ast->integer - right_at_zero_ast->integer + 1;
+					int width = abs(int(left_at_zero_ast->integer - right_at_zero_ast->integer)) + 1;
 					AstNode *fake_ast = new AstNode(AST_NONE, clone(), children[0]->children.size() >= 2 ?
 							children[0]->children[1]->clone() : children[0]->children[0]->clone());
 					fake_ast->children[0]->delete_children();
@@ -1409,10 +1422,16 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint)
 			if (GetSize(en) != 1)
 				en = current_module->ReduceBool(NEW_ID, en);
 
+			IdString cellname;
+			if (str.empty()) {
 				std::stringstream sstr;
 				sstr << celltype << "$" << filename << ":" << linenum << "$" << (autoidx++);
+				cellname = sstr.str();
+			} else {
+				cellname = str;
+			}
 
-			RTLIL::Cell *cell = current_module->addCell(sstr.str(), celltype);
+			RTLIL::Cell *cell = current_module->addCell(cellname, celltype);
 			cell->attributes["\\src"] = stringf("%s:%d", filename.c_str(), linenum);
 
 			for (auto &attr : attributes) {
@@ -1565,7 +1584,7 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint)
 	// everything should have been handled above -> print error if not.
 	default:
 		for (auto f : log_files)
-			current_ast->dumpAst(f, "verilog-ast> ");
+			current_ast_mod->dumpAst(f, "verilog-ast> ");
 		type_name = type2str(type);
 		log_file_error(filename, linenum, "Don't know how to generate RTLIL code for %s node!\n", type_name.c_str());
 	}

frontends/ast/simplify.cc

@@ -50,7 +50,6 @@ using namespace AST_INTERNAL;
 bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, int width_hint, bool sign_hint, bool in_param)
 {
 	static int recursion_counter = 0;
-	static pair<string, int> last_blocking_assignment_warn;
 	static bool deep_recursion_warning = false;
 
 	if (recursion_counter++ == 1000 && deep_recursion_warning) {
@@ -72,7 +71,6 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
 	if (stage == 0)
 	{
 		log_assert(type == AST_MODULE || type == AST_INTERFACE);
-		last_blocking_assignment_warn = pair<string, int>();
 
 		deep_recursion_warning = true;
 		while (simplify(const_fold, at_zero, in_lvalue, 1, width_hint, sign_hint, in_param)) { }
@@ -113,6 +111,9 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
 				if (memflags & AstNode::MEM2REG_FL_CMPLX_LHS)
 					goto verbose_activate;
 
+				if ((memflags & AstNode::MEM2REG_FL_CONST_LHS) && !(memflags & AstNode::MEM2REG_FL_VAR_LHS))
+					goto verbose_activate;
+
 				// log("Note: Not replacing memory %s with list of registers (flags=0x%08lx).\n", mem->str.c_str(), long(memflags));
 				continue;
 
@@ -325,6 +326,15 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
 		for (size_t i = 0; i < children.size(); i++) {
 			AstNode *node = children[i];
 			if (node->type == AST_WIRE) {
+				if (node->children.size() == 1 && node->children[0]->type == AST_RANGE) {
+					for (auto c : node->children[0]->children) {
+						if (!c->is_simple_const_expr()) {
+							if (attributes.count("\\dynports"))
+								delete attributes.at("\\dynports");
+							attributes["\\dynports"] = AstNode::mkconst_int(1, true);
+						}
+					}
+				}
 				if (this_wire_scope.count(node->str) > 0) {
 					AstNode *first_node = this_wire_scope[node->str];
 					if (first_node->is_input && node->is_reg)
@@ -642,6 +652,7 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
 	// (iterate by index as e.g. auto wires can add new children in the process)
 	for (size_t i = 0; i < children.size(); i++) {
 		bool did_something_here = true;
+		bool backup_flag_autowire = flag_autowire;
 		if ((type == AST_GENFOR || type == AST_FOR) && i >= 3)
 			break;
 		if ((type == AST_GENIF || type == AST_GENCASE) && i >= 1)
@@ -652,6 +663,8 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
 			break;
 		if (type == AST_PREFIX && i >= 1)
 			break;
+		if (type == AST_DEFPARAM && i == 0)
+			flag_autowire = true;
 		while (did_something_here && i < children.size()) {
 			bool const_fold_here = const_fold, in_lvalue_here = in_lvalue;
 			int width_hint_here = width_hint;
@@ -686,6 +699,7 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
 			children.erase(children.begin() + (i--));
 			did_something = true;
 		}
+		flag_autowire = backup_flag_autowire;
 	}
 	for (auto &attr : attributes) {
 		while (attr.second->simplify(true, false, false, stage, -1, false, true))
@@ -934,12 +948,15 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
 			}
 		}
 		if (current_scope.count(str) == 0) {
-			// log_warning("Creating auto-wire `%s' in module `%s'.\n", str.c_str(), current_ast_mod->str.c_str());
+			if (flag_autowire || str == "\\$global_clock") {
 				AstNode *auto_wire = new AstNode(AST_AUTOWIRE);
 				auto_wire->str = str;
 				current_ast_mod->children.push_back(auto_wire);
 				current_scope[str] = auto_wire;
 				did_something = true;
+			} else {
+				log_file_error(filename, linenum, "Identifier `%s' is implicitly declared and `default_nettype is set to none.\n", str.c_str());
+			}
 		}
 		if (id2ast != current_scope[str]) {
 			id2ast = current_scope[str];
@@ -1492,6 +1509,7 @@ skip_dynamic_range_lvalue_expansion:;
 		newNode->children.push_back(assign_en);
 
 		AstNode *assertnode = new AstNode(type);
+		assertnode->str = str;
 		assertnode->children.push_back(new AstNode(AST_IDENTIFIER));
 		assertnode->children.push_back(new AstNode(AST_IDENTIFIER));
 		assertnode->children[0]->str = id_check;
@@ -1572,14 +1590,6 @@ skip_dynamic_range_lvalue_expansion:;
 		sstr << "$memwr$" << children[0]->str << "$" << filename << ":" << linenum << "$" << (autoidx++);
 		std::string id_addr = sstr.str() + "_ADDR", id_data = sstr.str() + "_DATA", id_en = sstr.str() + "_EN";
 
-		if (type == AST_ASSIGN_EQ) {
-			pair<string, int> this_blocking_assignment_warn(filename, linenum);
-			if (this_blocking_assignment_warn != last_blocking_assignment_warn)
-				log_warning("Blocking assignment to memory in line %s:%d is handled like a non-blocking assignment.\n",
-						filename.c_str(), linenum);
-			last_blocking_assignment_warn = this_blocking_assignment_warn;
-		}
-
 		int mem_width, mem_size, addr_bits;
 		bool mem_signed = children[0]->id2ast->is_signed;
 		children[0]->id2ast->meminfo(mem_width, mem_size, addr_bits);
@@ -1689,7 +1699,7 @@ skip_dynamic_range_lvalue_expansion:;
 				while (right_at_zero_ast->simplify(true, true, false, 1, -1, false, false)) { }
 				if (left_at_zero_ast->type != AST_CONSTANT || right_at_zero_ast->type != AST_CONSTANT)
 					log_file_error(filename, linenum, "Unsupported expression on dynamic range select on signal `%s'!\n", str.c_str());
-				int width = left_at_zero_ast->integer - right_at_zero_ast->integer + 1;
+				int width = abs(int(left_at_zero_ast->integer - right_at_zero_ast->integer)) + 1;
 
 				assign_data = new AstNode(AST_ASSIGN_LE, new AstNode(AST_IDENTIFIER),
 						new AstNode(AST_SHIFT_LEFT, children[1]->clone(), offset_ast->clone()));
@@ -1778,7 +1788,7 @@ skip_dynamic_range_lvalue_expansion:;
 
 			if (str == "\\$past")
 			{
-				if (width_hint <= 0)
+				if (width_hint < 0)
 					goto replace_fcall_later;
 
 				int num_steps = 1;
@@ -2162,6 +2172,8 @@ skip_dynamic_range_lvalue_expansion:;
 				}
 
 				newNode = readmem(str == "\\$readmemh", node_filename->bitsAsConst().decode_string(), node_memory->id2ast, start_addr, finish_addr, unconditional_init);
+				delete node_filename;
+				delete node_memory;
 				goto apply_newNode;
 			}
 
@@ -2203,6 +2215,8 @@ skip_dynamic_range_lvalue_expansion:;
 		std::map<std::string, std::string> replace_rules;
 		vector<AstNode*> added_mod_children;
 		dict<std::string, AstNode*> wire_cache;
+		vector<AstNode*> new_stmts;
+		vector<AstNode*> output_assignments;
 
 		if (current_block == NULL)
 		{
@@ -2327,7 +2341,7 @@ skip_dynamic_range_lvalue_expansion:;
 					wire->port_id = 0;
 					wire->is_input = false;
 					wire->is_output = false;
-					if (!child->is_output)
+					wire->is_reg = true;
 					wire->attributes["\\nosync"] = AstNode::mkconst_int(1, false);
 					wire_cache[child->str] = wire;
 
@@ -2350,13 +2364,10 @@ skip_dynamic_range_lvalue_expansion:;
 							new AstNode(AST_ASSIGN_EQ, wire_id, arg) :
 							new AstNode(AST_ASSIGN_EQ, arg, wire_id);
 					assign->children[0]->was_checked = true;
-
+					if (child->is_input)
-					for (auto it = current_block->children.begin(); it != current_block->children.end(); it++) {
+						new_stmts.push_back(assign);
-						if (*it != current_block_child)
+					else
-							continue;
+						output_assignments.push_back(assign);
-						current_block->children.insert(it, assign);
-						break;
-					}
 				}
 			}
 
@@ -2370,11 +2381,15 @@ skip_dynamic_range_lvalue_expansion:;
 			{
 				AstNode *stmt = child->clone();
 				stmt->replace_ids(prefix, replace_rules);
+				new_stmts.push_back(stmt);
+			}
 
-				for (auto it = current_block->children.begin(); it != current_block->children.end(); it++) {
+		new_stmts.insert(new_stmts.end(), output_assignments.begin(), output_assignments.end());
-					if (*it != current_block_child)
+
-						continue;
+		for (auto it = current_block->children.begin(); ; it++) {
-					current_block->children.insert(it, stmt);
+			log_assert(it != current_block->children.end());
+			if (*it == current_block_child) {
+				current_block->children.insert(it, new_stmts.begin(), new_stmts.end());
 				break;
 			}
 		}
@@ -2848,7 +2863,11 @@ void AstNode::expand_genblock(std::string index_var, std::string prefix, std::ma
 
 	for (size_t i = 0; i < children.size(); i++) {
 		AstNode *child = children[i];
-		if (child->type != AST_FUNCTION && child->type != AST_TASK && child->type != AST_PREFIX)
+		// AST_PREFIX member names should not be prefixed; a nested AST_PREFIX
+		// still needs to recursed-into
+		if (type == AST_PREFIX && i == 1 && child->type == AST_IDENTIFIER)
+			continue;
+		if (child->type != AST_FUNCTION && child->type != AST_TASK)
 			child->expand_genblock(index_var, prefix, name_map);
 	}
 
@@ -2903,7 +2922,7 @@ void AstNode::mem2reg_as_needed_pass1(dict<AstNode*, pool<std::string>> &mem2reg
 		dict<AstNode*, uint32_t> &mem2reg_candidates, dict<AstNode*, uint32_t> &proc_flags, uint32_t &flags)
 {
 	uint32_t children_flags = 0;
-	int ignore_children_counter = 0;
+	int lhs_children_counter = 0;
 
 	if (type == AST_ASSIGN || type == AST_ASSIGN_LE || type == AST_ASSIGN_EQ)
 	{
@@ -2929,6 +2948,16 @@ void AstNode::mem2reg_as_needed_pass1(dict<AstNode*, pool<std::string>> &mem2reg
 				proc_flags[mem] |= AstNode::MEM2REG_FL_EQ1;
 			}
 
+			// for proper (non-init) writes: remember if this is a constant index or not
+			if ((flags & MEM2REG_FL_INIT) == 0) {
+				if (children[0]->children.size() && children[0]->children[0]->type == AST_RANGE && children[0]->children[0]->children.size()) {
+					if (children[0]->children[0]->children[0]->type == AST_CONSTANT)
+						mem2reg_candidates[mem] |= AstNode::MEM2REG_FL_CONST_LHS;
+					else
+						mem2reg_candidates[mem] |= AstNode::MEM2REG_FL_VAR_LHS;
+				}
+			}
+
 			// remember where this is
 			if (flags & MEM2REG_FL_INIT) {
 				if (!(mem2reg_candidates[mem] & AstNode::MEM2REG_FL_SET_INIT))
@@ -2941,7 +2970,7 @@ void AstNode::mem2reg_as_needed_pass1(dict<AstNode*, pool<std::string>> &mem2reg
 			}
 		}
 
-		ignore_children_counter = 1;
+		lhs_children_counter = 1;
 	}
 
 	if (type == AST_IDENTIFIER && id2ast && id2ast->type == AST_MEMORY)
@@ -2984,12 +3013,23 @@ void AstNode::mem2reg_as_needed_pass1(dict<AstNode*, pool<std::string>> &mem2reg
 	log_assert((flags & ~0x000000ff) == 0);
 
 	for (auto child : children)
-		if (ignore_children_counter > 0)
+	{
-			ignore_children_counter--;
+		if (lhs_children_counter > 0) {
-		else if (proc_flags_p)
+			lhs_children_counter--;
+			if (child->children.size() && child->children[0]->type == AST_RANGE && child->children[0]->children.size()) {
+				for (auto c : child->children[0]->children) {
+					if (proc_flags_p)
+						c->mem2reg_as_needed_pass1(mem2reg_places, mem2reg_candidates, *proc_flags_p, flags);
+					else
+						c->mem2reg_as_needed_pass1(mem2reg_places, mem2reg_candidates, proc_flags, flags);
+				}
+			}
+		} else
+		if (proc_flags_p)
 			child->mem2reg_as_needed_pass1(mem2reg_places, mem2reg_candidates, *proc_flags_p, flags);
 		else
 			child->mem2reg_as_needed_pass1(mem2reg_places, mem2reg_candidates, proc_flags, flags);
+	}
 
 	flags &= ~children_flags | backup_flags;
 
@@ -3041,6 +3081,39 @@ bool AstNode::mem2reg_as_needed_pass2(pool<AstNode*> &mem2reg_set, AstNode *mod,
 	if (type == AST_FUNCTION || type == AST_TASK)
 		return false;
 
+	if (type == AST_MEMINIT && id2ast && mem2reg_set.count(id2ast))
+	{
+		log_assert(children[0]->type == AST_CONSTANT);
+		log_assert(children[1]->type == AST_CONSTANT);
+		log_assert(children[2]->type == AST_CONSTANT);
+
+		int cursor = children[0]->asInt(false);
+		Const data = children[1]->bitsAsConst();
+		int length = children[2]->asInt(false);
+
+		if (length != 0)
+		{
+			AstNode *block = new AstNode(AST_INITIAL, new AstNode(AST_BLOCK));
+			mod->children.push_back(block);
+			block = block->children[0];
+
+			int wordsz = GetSize(data) / length;
+
+			for (int i = 0; i < length; i++) {
+				block->children.push_back(new AstNode(AST_ASSIGN_EQ, new AstNode(AST_IDENTIFIER, new AstNode(AST_RANGE, AstNode::mkconst_int(cursor+i, false))), mkconst_bits(data.extract(i*wordsz, wordsz).bits, false)));
+				block->children.back()->children[0]->str = str;
+				block->children.back()->children[0]->id2ast = id2ast;
+				block->children.back()->children[0]->was_checked = true;
+			}
+		}
+
+		AstNode *newNode = new AstNode(AST_NONE);
+		newNode->cloneInto(this);
+		delete newNode;
+
+		did_something = true;
+	}
+
 	if (type == AST_ASSIGN && block == NULL && children[0]->mem2reg_check(mem2reg_set))
 	{
 		if (async_block == NULL) {
@@ -3270,6 +3343,16 @@ bool AstNode::has_const_only_constructs(bool &recommend_const_eval)
 	return false;
 }
 
+bool AstNode::is_simple_const_expr()
+{
+	if (type == AST_IDENTIFIER)
+		return false;
+	for (auto child : children)
+		if (!child->is_simple_const_expr())
+			return false;
+	return true;
+}
+
 // helper function for AstNode::eval_const_function()
 void AstNode::replace_variables(std::map<std::string, AstNode::varinfo_t> &variables, AstNode *fcall)
 {

frontends/verific/README

@@ -21,7 +21,7 @@ Then run in the following command in this directory:
 
 	sby -f example.sby
 
-This will generate approximately one page of text outpout. The last lines
+This will generate approximately one page of text output. The last lines
 should be something like this:
 
 	SBY [example] summary: Elapsed clock time [H:MM:SS (secs)]: 0:00:00 (0)

frontends/verific/verific.cc

@@ -1855,6 +1855,13 @@ struct VerificPass : public Pass {
 		log("  -autocover\n");
 		log("    Generate automatic cover statements for all asserts\n");
 		log("\n");
+		log("  -chparam name value \n");
+		log("    Elaborate the specified top modules (all modules when -all given) using\n");
+		log("    this parameter value. Modules on which this parameter does not exist will\n");
+		log("    cause Verific to produce a VERI-1928 or VHDL-1676 message. This option\n");
+		log("    can be specified multiple times to override multiple parameters.\n");
+		log("    String values must be passed in double quotes (\").\n");
+		log("\n");
 		log("  -v, -vv\n");
 		log("    Verbose log messages. (-vv is even more verbose than -v.)\n");
 		log("\n");
@@ -1920,6 +1927,10 @@ struct VerificPass : public Pass {
 			// WARNING: instantiating unknown module 'XYZ' (VERI-1063)
 			Message::SetMessageType("VERI-1063", VERIFIC_ERROR);
 
+#ifndef DB_PRESERVE_INITIAL_VALUE
+#  warning Verific was built without DB_PRESERVE_INITIAL_VALUE.
+#endif
+
 			set_verific_global_flags = false;
 		}
 
@@ -2105,6 +2116,7 @@ struct VerificPass : public Pass {
 			bool mode_autocover = false;
 			bool flatten = false, extnets = false;
 			string dumpfile;
+			Map parameters(STRING_HASH);
 
 			for (argidx++; argidx < GetSize(args); argidx++) {
 				if (args[argidx] == "-all") {
@@ -2143,6 +2155,15 @@ struct VerificPass : public Pass {
 					mode_autocover = true;
 					continue;
 				}
+				if (args[argidx] == "-chparam"  && argidx+2 < GetSize(args)) {
+                                        const std::string &key = args[++argidx];
+                                        const std::string &value = args[++argidx];
+					unsigned new_insertion = parameters.Insert(key.c_str(), value.c_str(),
+									           1 /* force_overwrite */);
+					if (!new_insertion)
+						log_warning_noprefix("-chparam %s already specified: overwriting.\n", key.c_str());
+					continue;
+				}
 				if (args[argidx] == "-V") {
 					mode_verific = true;
 					continue;
@@ -2176,7 +2197,7 @@ struct VerificPass : public Pass {
 				if (vhdl_lib) vhdl_libs.InsertLast(vhdl_lib);
 				if (veri_lib) veri_libs.InsertLast(veri_lib);
 
-				Array *netlists = hier_tree::ElaborateAll(&veri_libs, &vhdl_libs);
+				Array *netlists = hier_tree::ElaborateAll(&veri_libs, &vhdl_libs, &parameters);
 				Netlist *nl;
 				int i;
 
@@ -2213,7 +2234,7 @@ struct VerificPass : public Pass {
 				}
 
 				log("Running hier_tree::Elaborate().\n");
-				Array *netlists = hier_tree::Elaborate(&veri_modules, &vhdl_units);
+				Array *netlists = hier_tree::Elaborate(&veri_modules, &vhdl_units, &parameters);
 				Netlist *nl;
 				int i;
 
@@ -2312,7 +2333,7 @@ struct ReadPass : public Pass {
 	}
 	void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
 	{
-		if (args.size() < 2)
+		if (args.size() < 2 || args[1][0] != '-')
 			log_cmd_error("Missing mode parameter.\n");
 
 		if (args.size() < 3)

frontends/verific/verificsva.cc

@@ -1666,7 +1666,20 @@ struct VerificSvaImporter
 				log("  importing SVA property at root cell %s (%s) at %s:%d.\n", root->Name(), root->View()->Owner()->Name(),
 						LineFile::GetFileName(root->Linefile()), LineFile::GetLineNo(root->Linefile()));
 
-			RTLIL::IdString root_name = module->uniquify(importer->mode_names || root->IsUserDeclared() ? RTLIL::escape_id(root->Name()) : NEW_ID);
+			bool is_user_declared = root->IsUserDeclared();
+
+			// FIXME
+			if (!is_user_declared) {
+				const char *name = root->Name();
+				for (int i = 0; name[i]; i++) {
+					if (i ? (name[i] < '0' || name[i] > '9') : (name[i] != 'i')) {
+						is_user_declared = true;
+						break;
+					}
+				}
+			}
+
+			RTLIL::IdString root_name = module->uniquify(importer->mode_names || is_user_declared ? RTLIL::escape_id(root->Name()) : NEW_ID);
 
 			// parse SVA sequence into trigger signal
 

frontends/verilog/verilog_lexer.l

@@ -189,6 +189,14 @@ YOSYS_NAMESPACE_END
 "always_ff"    { SV_KEYWORD(TOK_ALWAYS); }
 "always_latch" { SV_KEYWORD(TOK_ALWAYS); }
 
+ /* use special token for labels on assert, assume, cover, and restrict because it's insanley complex
+    to fix parsing of cells otherwise. (the current cell parser forces a reduce very early to update some
+    global state.. its a mess) */
+[a-zA-Z_$][a-zA-Z0-9_$]*/[ \t\r\n]*:[ \t\r\n]*(assert|assume|cover|restrict)[^a-zA-Z0-9_$\.] {
+	frontend_verilog_yylval.string = new std::string(std::string("\\") + yytext);
+	return TOK_SVA_LABEL;
+}
+
 "assert"     { if (formal_mode) return TOK_ASSERT; SV_KEYWORD(TOK_ASSERT); }
 "assume"     { if (formal_mode) return TOK_ASSUME; SV_KEYWORD(TOK_ASSUME); }
 "cover"      { if (formal_mode) return TOK_COVER; SV_KEYWORD(TOK_COVER); }

frontends/verilog/verilog_parser.y

@@ -105,7 +105,8 @@ static void free_attr(std::map<std::string, AstNode*> *al)
 	bool boolean;
 }
 
-%token <string> TOK_STRING TOK_ID TOK_CONSTVAL TOK_REALVAL TOK_PRIMITIVE
+%token <string> TOK_STRING TOK_ID TOK_CONSTVAL TOK_REALVAL TOK_PRIMITIVE TOK_SVA_LABEL
+%token TOK_ASSERT TOK_ASSUME TOK_RESTRICT TOK_COVER
 %token ATTR_BEGIN ATTR_END DEFATTR_BEGIN DEFATTR_END
 %token TOK_MODULE TOK_ENDMODULE TOK_PARAMETER TOK_LOCALPARAM TOK_DEFPARAM
 %token TOK_PACKAGE TOK_ENDPACKAGE TOK_PACKAGESEP
@@ -119,14 +120,13 @@ static void free_attr(std::map<std::string, AstNode*> *al)
 %token TOK_GENERATE TOK_ENDGENERATE TOK_GENVAR TOK_REAL
 %token TOK_SYNOPSYS_FULL_CASE TOK_SYNOPSYS_PARALLEL_CASE
 %token TOK_SUPPLY0 TOK_SUPPLY1 TOK_TO_SIGNED TOK_TO_UNSIGNED
-%token TOK_POS_INDEXED TOK_NEG_INDEXED TOK_ASSERT TOK_ASSUME
+%token TOK_POS_INDEXED TOK_NEG_INDEXED TOK_PROPERTY TOK_ENUM TOK_TYPEDEF
-%token TOK_RESTRICT TOK_COVER TOK_PROPERTY TOK_ENUM TOK_TYPEDEF
 %token TOK_RAND TOK_CONST TOK_CHECKER TOK_ENDCHECKER TOK_EVENTUALLY
 %token TOK_INCREMENT TOK_DECREMENT TOK_UNIQUE TOK_PRIORITY
 
 %type <ast> range range_or_multirange  non_opt_range non_opt_multirange range_or_signed_int
 %type <ast> wire_type expr basic_expr concat_list rvalue lvalue lvalue_concat_list
-%type <string> opt_label tok_prim_wrapper hierarchical_id
+%type <string> opt_label opt_sva_label tok_prim_wrapper hierarchical_id
 %type <boolean> opt_signed opt_property unique_case_attr
 %type <al> attr case_attr
 
@@ -1329,6 +1329,14 @@ opt_label:
 		$$ = NULL;
 	};
 
+opt_sva_label:
+	TOK_SVA_LABEL ':' {
+		$$ = $1;
+	} |
+	/* empty */ {
+		$$ = NULL;
+	};
+
 opt_property:
 	TOK_PROPERTY {
 		$$ = true;
@@ -1337,9 +1345,6 @@ opt_property:
 		$$ = false;
 	};
 
-opt_stmt_label:
-	TOK_ID ':' | /* empty */;
-
 modport_stmt:
     TOK_MODPORT TOK_ID {
         AstNode *modport = new AstNode(AST_MODPORT);
@@ -1376,83 +1381,164 @@ modport_type_token:
     TOK_INPUT {current_modport_input = 1; current_modport_output = 0;} | TOK_OUTPUT {current_modport_input = 0; current_modport_output = 1;}
 
 assert:
-	opt_stmt_label TOK_ASSERT opt_property '(' expr ')' ';' {
+	opt_sva_label TOK_ASSERT opt_property '(' expr ')' ';' {
-		if (noassert_mode)
+		if (noassert_mode) {
 			delete $5;
-		else
+		} else {
-			ast_stack.back()->children.push_back(new AstNode(assume_asserts_mode ? AST_ASSUME : AST_ASSERT, $5));
+			AstNode *node = new AstNode(assume_asserts_mode ? AST_ASSUME : AST_ASSERT, $5);
+			if ($1 != nullptr)
+				node->str = *$1;
+			ast_stack.back()->children.push_back(node);
+		}
+		if ($1 != nullptr)
+			delete $1;
 	} |
-	opt_stmt_label TOK_ASSUME opt_property '(' expr ')' ';' {
+	opt_sva_label TOK_ASSUME opt_property '(' expr ')' ';' {
-		if (noassume_mode)
+		if (noassume_mode) {
 			delete $5;
-		else
+		} else {
-			ast_stack.back()->children.push_back(new AstNode(assert_assumes_mode ? AST_ASSERT : AST_ASSUME, $5));
+			AstNode *node = new AstNode(assert_assumes_mode ? AST_ASSERT : AST_ASSUME, $5);
+			if ($1 != nullptr)
+				node->str = *$1;
+			ast_stack.back()->children.push_back(node);
+		}
+		if ($1 != nullptr)
+			delete $1;
 	} |
-	opt_stmt_label TOK_ASSERT opt_property '(' TOK_EVENTUALLY expr ')' ';' {
+	opt_sva_label TOK_ASSERT opt_property '(' TOK_EVENTUALLY expr ')' ';' {
-		if (noassert_mode)
+		if (noassert_mode) {
 			delete $6;
-		else
+		} else {
-			ast_stack.back()->children.push_back(new AstNode(assume_asserts_mode ? AST_FAIR : AST_LIVE, $6));
+			AstNode *node = new AstNode(assume_asserts_mode ? AST_FAIR : AST_LIVE, $6);
+			if ($1 != nullptr)
+				node->str = *$1;
+			ast_stack.back()->children.push_back(node);
+		}
+		if ($1 != nullptr)
+			delete $1;
 	} |
-	opt_stmt_label TOK_ASSUME opt_property '(' TOK_EVENTUALLY expr ')' ';' {
+	opt_sva_label TOK_ASSUME opt_property '(' TOK_EVENTUALLY expr ')' ';' {
-		if (noassume_mode)
+		if (noassume_mode) {
 			delete $6;
-		else
+		} else {
-			ast_stack.back()->children.push_back(new AstNode(assert_assumes_mode ? AST_LIVE : AST_FAIR, $6));
+			AstNode *node = new AstNode(assert_assumes_mode ? AST_LIVE : AST_FAIR, $6);
+			if ($1 != nullptr)
+				node->str = *$1;
+			ast_stack.back()->children.push_back(node);
+		}
+		if ($1 != nullptr)
+			delete $1;
 	} |
-	opt_stmt_label TOK_COVER opt_property '(' expr ')' ';' {
+	opt_sva_label TOK_COVER opt_property '(' expr ')' ';' {
-		ast_stack.back()->children.push_back(new AstNode(AST_COVER, $5));
+		AstNode *node = new AstNode(AST_COVER, $5);
+		if ($1 != nullptr) {
+			node->str = *$1;
+			delete $1;
+		}
+		ast_stack.back()->children.push_back(node);
 	} |
-	opt_stmt_label TOK_COVER opt_property '(' ')' ';' {
+	opt_sva_label TOK_COVER opt_property '(' ')' ';' {
-		ast_stack.back()->children.push_back(new AstNode(AST_COVER, AstNode::mkconst_int(1, false)));
+		AstNode *node = new AstNode(AST_COVER, AstNode::mkconst_int(1, false));
+		if ($1 != nullptr) {
+			node->str = *$1;
+			delete $1;
+		}
+		ast_stack.back()->children.push_back(node);
 	} |
-	opt_stmt_label TOK_COVER ';' {
+	opt_sva_label TOK_COVER ';' {
-		ast_stack.back()->children.push_back(new AstNode(AST_COVER, AstNode::mkconst_int(1, false)));
+		AstNode *node = new AstNode(AST_COVER, AstNode::mkconst_int(1, false));
+		if ($1 != nullptr) {
+			node->str = *$1;
+			delete $1;
+		}
+		ast_stack.back()->children.push_back(node);
 	} |
-	opt_stmt_label TOK_RESTRICT opt_property '(' expr ')' ';' {
+	opt_sva_label TOK_RESTRICT opt_property '(' expr ')' ';' {
-		if (norestrict_mode)
+		if (norestrict_mode) {
 			delete $5;
-		else
+		} else {
-			ast_stack.back()->children.push_back(new AstNode(AST_ASSUME, $5));
+			AstNode *node = new AstNode(AST_ASSUME, $5);
+			if ($1 != nullptr)
+				node->str = *$1;
+			ast_stack.back()->children.push_back(node);
+		}
 		if (!$3)
 			log_file_warning(current_filename, get_line_num(), "SystemVerilog does not allow \"restrict\" without \"property\".\n");
+		if ($1 != nullptr)
+			delete $1;
 	} |
-	opt_stmt_label TOK_RESTRICT opt_property '(' TOK_EVENTUALLY expr ')' ';' {
+	opt_sva_label TOK_RESTRICT opt_property '(' TOK_EVENTUALLY expr ')' ';' {
-		if (norestrict_mode)
+		if (norestrict_mode) {
 			delete $6;
-		else
+		} else {
-			ast_stack.back()->children.push_back(new AstNode(AST_FAIR, $6));
+			AstNode *node = new AstNode(AST_FAIR, $6);
+			if ($1 != nullptr)
+				node->str = *$1;
+			ast_stack.back()->children.push_back(node);
+		}
 		if (!$3)
 			log_file_warning(current_filename, get_line_num(), "SystemVerilog does not allow \"restrict\" without \"property\".\n");
+		if ($1 != nullptr)
+			delete $1;
 	};
 
 assert_property:
-	TOK_ASSERT TOK_PROPERTY '(' expr ')' ';' {
+	opt_sva_label TOK_ASSERT TOK_PROPERTY '(' expr ')' ';' {
-		ast_stack.back()->children.push_back(new AstNode(assume_asserts_mode ? AST_ASSUME : AST_ASSERT, $4));
+		ast_stack.back()->children.push_back(new AstNode(assume_asserts_mode ? AST_ASSUME : AST_ASSERT, $5));
+		if ($1 != nullptr) {
+			ast_stack.back()->children.back()->str = *$1;
+			delete $1;
+		}
 	} |
-	TOK_ASSUME TOK_PROPERTY '(' expr ')' ';' {
+	opt_sva_label TOK_ASSUME TOK_PROPERTY '(' expr ')' ';' {
-		ast_stack.back()->children.push_back(new AstNode(AST_ASSUME, $4));
+		ast_stack.back()->children.push_back(new AstNode(AST_ASSUME, $5));
+		if ($1 != nullptr) {
+			ast_stack.back()->children.back()->str = *$1;
+			delete $1;
+		}
 	} |
-	TOK_ASSERT TOK_PROPERTY '(' TOK_EVENTUALLY expr ')' ';' {
+	opt_sva_label TOK_ASSERT TOK_PROPERTY '(' TOK_EVENTUALLY expr ')' ';' {
-		ast_stack.back()->children.push_back(new AstNode(assume_asserts_mode ? AST_FAIR : AST_LIVE, $5));
+		ast_stack.back()->children.push_back(new AstNode(assume_asserts_mode ? AST_FAIR : AST_LIVE, $6));
+		if ($1 != nullptr) {
+			ast_stack.back()->children.back()->str = *$1;
+			delete $1;
+		}
 	} |
-	TOK_ASSUME TOK_PROPERTY '(' TOK_EVENTUALLY expr ')' ';' {
+	opt_sva_label TOK_ASSUME TOK_PROPERTY '(' TOK_EVENTUALLY expr ')' ';' {
-		ast_stack.back()->children.push_back(new AstNode(AST_FAIR, $5));
+		ast_stack.back()->children.push_back(new AstNode(AST_FAIR, $6));
+		if ($1 != nullptr) {
+			ast_stack.back()->children.back()->str = *$1;
+			delete $1;
+		}
 	} |
-	TOK_COVER TOK_PROPERTY '(' expr ')' ';' {
+	opt_sva_label TOK_COVER TOK_PROPERTY '(' expr ')' ';' {
-		ast_stack.back()->children.push_back(new AstNode(AST_COVER, $4));
+		ast_stack.back()->children.push_back(new AstNode(AST_COVER, $5));
+		if ($1 != nullptr) {
+			ast_stack.back()->children.back()->str = *$1;
+			delete $1;
+		}
 	} |
-	TOK_RESTRICT TOK_PROPERTY '(' expr ')' ';' {
+	opt_sva_label TOK_RESTRICT TOK_PROPERTY '(' expr ')' ';' {
-		if (norestrict_mode)
+		if (norestrict_mode) {
-			delete $4;
-		else
-			ast_stack.back()->children.push_back(new AstNode(AST_ASSUME, $4));
-	} |
-	TOK_RESTRICT TOK_PROPERTY '(' TOK_EVENTUALLY expr ')' ';' {
-		if (norestrict_mode)
 			delete $5;
-		else
+		} else {
-			ast_stack.back()->children.push_back(new AstNode(AST_FAIR, $5));
+			ast_stack.back()->children.push_back(new AstNode(AST_ASSUME, $5));
+			if ($1 != nullptr) {
+				ast_stack.back()->children.back()->str = *$1;
+				delete $1;
+			}
+		}
+	} |
+	opt_sva_label TOK_RESTRICT TOK_PROPERTY '(' TOK_EVENTUALLY expr ')' ';' {
+		if (norestrict_mode) {
+			delete $6;
+		} else {
+			ast_stack.back()->children.push_back(new AstNode(AST_FAIR, $6));
+			if ($1 != nullptr) {
+				ast_stack.back()->children.back()->str = *$1;
+				delete $1;
+			}
+		}
 	};
 
 simple_behavioral_stmt:
@@ -1670,6 +1756,11 @@ case_expr_list:
 	TOK_DEFAULT {
 		ast_stack.back()->children.push_back(new AstNode(AST_DEFAULT));
 	} |
+	TOK_SVA_LABEL {
+		ast_stack.back()->children.push_back(new AstNode(AST_IDENTIFIER));
+		ast_stack.back()->children.back()->str = *$1;
+		delete $1;
+	} |
 	expr {
 		ast_stack.back()->children.push_back($1);
 	} |

kernel/celltypes.h

@@ -81,6 +81,27 @@ struct CellTypes
 	}
 
 	void setup_internals()
+	{
+		setup_internals_eval();
+
+		IdString A = "\\A", B = "\\B", EN = "\\EN", Y = "\\Y";
+
+		setup_type("$tribuf", {A, EN}, {Y}, true);
+
+		setup_type("$assert", {A, EN}, pool<RTLIL::IdString>(), true);
+		setup_type("$assume", {A, EN}, pool<RTLIL::IdString>(), true);
+		setup_type("$live", {A, EN}, pool<RTLIL::IdString>(), true);
+		setup_type("$fair", {A, EN}, pool<RTLIL::IdString>(), true);
+		setup_type("$cover", {A, EN}, pool<RTLIL::IdString>(), true);
+		setup_type("$initstate", pool<RTLIL::IdString>(), {Y}, true);
+		setup_type("$anyconst", pool<RTLIL::IdString>(), {Y}, true);
+		setup_type("$anyseq", pool<RTLIL::IdString>(), {Y}, true);
+		setup_type("$allconst", pool<RTLIL::IdString>(), {Y}, true);
+		setup_type("$allseq", pool<RTLIL::IdString>(), {Y}, true);
+		setup_type("$equiv", {A, B}, {Y}, true);
+	}
+
+	void setup_internals_eval()
 	{
 		std::vector<RTLIL::IdString> unary_ops = {
 			"$not", "$pos", "$neg",
@@ -111,20 +132,6 @@ struct CellTypes
 		setup_type("$lcu", {P, G, CI}, {CO}, true);
 		setup_type("$alu", {A, B, CI, BI}, {X, Y, CO}, true);
 		setup_type("$fa", {A, B, C}, {X, Y}, true);
-
-		setup_type("$tribuf", {A, EN}, {Y}, true);
-
-		setup_type("$assert", {A, EN}, pool<RTLIL::IdString>(), true);
-		setup_type("$assume", {A, EN}, pool<RTLIL::IdString>(), true);
-		setup_type("$live", {A, EN}, pool<RTLIL::IdString>(), true);
-		setup_type("$fair", {A, EN}, pool<RTLIL::IdString>(), true);
-		setup_type("$cover", {A, EN}, pool<RTLIL::IdString>(), true);
-		setup_type("$initstate", pool<RTLIL::IdString>(), {Y}, true);
-		setup_type("$anyconst", pool<RTLIL::IdString>(), {Y}, true);
-		setup_type("$anyseq", pool<RTLIL::IdString>(), {Y}, true);
-		setup_type("$allconst", pool<RTLIL::IdString>(), {Y}, true);
-		setup_type("$allseq", pool<RTLIL::IdString>(), {Y}, true);
-		setup_type("$equiv", {A, B}, {Y}, true);
 	}
 
 	void setup_internals_mem()
@@ -153,6 +160,15 @@ struct CellTypes
 	}
 
 	void setup_stdcells()
+	{
+		setup_stdcells_eval();
+
+		IdString A = "\\A", E = "\\E", Y = "\\Y";
+
+		setup_type("$_TBUF_", {A, E}, {Y}, true);
+	}
+
+	void setup_stdcells_eval()
 	{
 		IdString A = "\\A", B = "\\B", C = "\\C", D = "\\D";
 		IdString E = "\\E", F = "\\F", G = "\\G", H = "\\H";
@@ -179,7 +195,6 @@ struct CellTypes
 		setup_type("$_OAI3_", {A, B, C}, {Y}, true);
 		setup_type("$_AOI4_", {A, B, C, D}, {Y}, true);
 		setup_type("$_OAI4_", {A, B, C, D}, {Y}, true);
-		setup_type("$_TBUF_", {A, E}, {Y}, true);
 	}
 
 	void setup_stdcells_mem()

kernel/driver.cc

@@ -179,6 +179,7 @@ int main(int argc, char **argv)
 {
 	std::string frontend_command = "auto";
 	std::string backend_command = "auto";
+	std::vector<std::string> vlog_defines;
 	std::vector<std::string> passes_commands;
 	std::vector<std::string> plugin_filenames;
 	std::string output_filename = "";
@@ -268,7 +269,10 @@ int main(int argc, char **argv)
 		printf("    -A\n");
 		printf("        will call abort() at the end of the script. for debugging\n");
 		printf("\n");
-		printf("    -D <header_id>[:<filename>]\n");
+		printf("    -D <macro>[=<value>]\n");
+		printf("        set the specified Verilog define (via \"read -define\")\n");
+		printf("\n");
+		printf("    -P <header_id>[:<filename>]\n");
 		printf("        dump the design when printing the specified log header to a file.\n");
 		printf("        yosys_dump_<header_id>.il is used as filename if none is specified.\n");
 		printf("        Use 'ALL' as <header_id> to dump at every header.\n");
@@ -307,7 +311,7 @@ int main(int argc, char **argv)
 	}
 
 	int opt;
-	while ((opt = getopt(argc, argv, "MXAQTVSm:f:Hh:b:o:p:l:L:qv:tds:c:W:w:e:D:E:")) != -1)
+	while ((opt = getopt(argc, argv, "MXAQTVSm:f:Hh:b:o:p:l:L:qv:tds:c:W:w:e:D:P:E:")) != -1)
 	{
 		switch (opt)
 		{
@@ -408,6 +412,9 @@ int main(int argc, char **argv)
 					std::regex_constants::egrep));
 			break;
 		case 'D':
+			vlog_defines.push_back(optarg);
+			break;
+		case 'P':
 			{
 				auto args = split_tokens(optarg, ":");
 				if (!args.empty() && args[0] == "ALL") {
@@ -473,6 +480,13 @@ int main(int argc, char **argv)
 		shell(yosys_design);
 	}
 
+	if (!vlog_defines.empty()) {
+		std::string vdef_cmd = "read -define";
+		for (auto vdef : vlog_defines)
+			vdef_cmd += " " + vdef;
+		run_pass(vdef_cmd);
+	}
+
 	while (optind < argc)
 		run_frontend(argv[optind++], frontend_command, output_filename == "-" ? &backend_command : NULL);
 

kernel/hashlib.h

@@ -557,9 +557,11 @@ public:
 	void clear() { hashtable.clear(); entries.clear(); }
 
 	iterator begin() { return iterator(this, int(entries.size())-1); }
+	iterator element(int n) { return iterator(this, int(entries.size())-1-n); }
 	iterator end() { return iterator(nullptr, -1); }
 
 	const_iterator begin() const { return const_iterator(this, int(entries.size())-1); }
+	const_iterator element(int n) const { return const_iterator(this, int(entries.size())-1-n); }
 	const_iterator end() const { return const_iterator(nullptr, -1); }
 };
 
@@ -881,9 +883,11 @@ public:
 	void clear() { hashtable.clear(); entries.clear(); }
 
 	iterator begin() { return iterator(this, int(entries.size())-1); }
+	iterator element(int n) { return iterator(this, int(entries.size())-1-n); }
 	iterator end() { return iterator(nullptr, -1); }
 
 	const_iterator begin() const { return const_iterator(this, int(entries.size())-1); }
+	const_iterator element(int n) const { return const_iterator(this, int(entries.size())-1-n); }
 	const_iterator end() const { return const_iterator(nullptr, -1); }
 };
 
@@ -952,6 +956,7 @@ public:
 	void clear() { database.clear(); }
 
 	const_iterator begin() const { return database.begin(); }
+	const_iterator element(int n) const { return database.element(n); }
 	const_iterator end() const { return database.end(); }
 };
 
@@ -1051,6 +1056,7 @@ public:
 	void clear() { database.clear(); parents.clear(); }
 
 	const_iterator begin() const { return database.begin(); }
+	const_iterator element(int n) const { return database.element(n); }
 	const_iterator end() const { return database.end(); }
 };
 

kernel/log.cc

@@ -196,7 +196,11 @@ void logv_header(RTLIL::Design *design, const char *format, va_list ap)
 	if (log_hdump.count(header_id) && design != nullptr)
 		for (auto &filename : log_hdump.at(header_id)) {
 			log("Dumping current design to '%s'.\n", filename.c_str());
+			if (yosys_xtrace)
+				IdString::xtrace_db_dump();
 			Pass::call(design, {"dump", "-o", filename});
+			if (yosys_xtrace)
+				log("#X# -- end of dump --\n");
 		}
 
 	if (pop_errfile)

kernel/register.cc

@@ -86,6 +86,8 @@ Pass::pre_post_exec_state_t Pass::pre_execute()
 
 void Pass::post_execute(Pass::pre_post_exec_state_t state)
 {
+	IdString::checkpoint();
+
 	int64_t time_ns = PerformanceTimer::query() - state.begin_ns;
 	runtime_ns += time_ns;
 	current_pass = state.parent_pass;

kernel/rtlil.cc

@@ -33,6 +33,8 @@ std::vector<int> RTLIL::IdString::global_refcount_storage_;
 std::vector<char*> RTLIL::IdString::global_id_storage_;
 dict<char*, int, hash_cstr_ops> RTLIL::IdString::global_id_index_;
 std::vector<int> RTLIL::IdString::global_free_idx_list_;
+int RTLIL::IdString::last_created_idx_[8];
+int RTLIL::IdString::last_created_idx_ptr_;
 
 RTLIL::Const::Const()
 {
@@ -758,7 +760,7 @@ namespace {
 
 		void check()
 		{
-			if (cell->type.substr(0, 1) != "$" || cell->type.substr(0, 3) == "$__" || cell->type.substr(0, 8) == "$paramod" ||
+			if (cell->type.substr(0, 1) != "$" || cell->type.substr(0, 3) == "$__" || cell->type.substr(0, 8) == "$paramod" || cell->type.substr(0,10) == "$fmcombine" ||
 					cell->type.substr(0, 9) == "$verific$" || cell->type.substr(0, 7) == "$array:" || cell->type.substr(0, 8) == "$extern:")
 				return;
 
@@ -2358,7 +2360,7 @@ void RTLIL::Cell::check()
 
 void RTLIL::Cell::fixup_parameters(bool set_a_signed, bool set_b_signed)
 {
-	if (type.substr(0, 1) != "$" || type.substr(0, 2) == "$_" || type.substr(0, 8) == "$paramod" ||
+	if (type.substr(0, 1) != "$" || type.substr(0, 2) == "$_" || type.substr(0, 8) == "$paramod" || type.substr(0,10) == "$fmcombine" ||
 			type.substr(0, 9) == "$verific$" || type.substr(0, 7) == "$array:" || type.substr(0, 8) == "$extern:")
 		return;
 
@@ -2410,6 +2412,9 @@ void RTLIL::Cell::fixup_parameters(bool set_a_signed, bool set_b_signed)
 	if (connections_.count("\\Y"))
 		parameters["\\Y_WIDTH"] = GetSize(connections_["\\Y"]);
 
+	if (connections_.count("\\Q"))
+		parameters["\\WIDTH"] = GetSize(connections_["\\Q"]);
+
 	check();
 }
 

kernel/rtlil.h

@@ -76,6 +76,9 @@ namespace RTLIL
 
 	struct IdString
 	{
+		#undef YOSYS_XTRACE_GET_PUT
+		#undef YOSYS_SORT_ID_FREE_LIST
+
 		// the global id string cache
 
 		static struct destruct_guard_t {
@@ -89,9 +92,43 @@ namespace RTLIL
 		static dict<char*, int, hash_cstr_ops> global_id_index_;
 		static std::vector<int> global_free_idx_list_;
 
+		static int last_created_idx_ptr_;
+		static int last_created_idx_[8];
+
+		static inline void xtrace_db_dump()
+		{
+		#ifdef YOSYS_XTRACE_GET_PUT
+			for (int idx = 0; idx < GetSize(global_id_storage_); idx++)
+			{
+				if (global_id_storage_.at(idx) == nullptr)
+					log("#X# DB-DUMP index %d: FREE\n", idx);
+				else
+					log("#X# DB-DUMP index %d: '%s' (ref %d)\n", idx, global_id_storage_.at(idx), global_refcount_storage_.at(idx));
+			}
+		#endif
+		}
+
+		static inline void checkpoint()
+		{
+			last_created_idx_ptr_ = 0;
+			for (int i = 0; i < 8; i++) {
+				if (last_created_idx_[i])
+					put_reference(last_created_idx_[i]);
+				last_created_idx_[i] = 0;
+			}
+		#ifdef YOSYS_SORT_ID_FREE_LIST
+			std::sort(global_free_idx_list_.begin(), global_free_idx_list_.end(), std::greater<int>());
+		#endif
+		}
+
 		static inline int get_reference(int idx)
 		{
 			global_refcount_storage_.at(idx)++;
+		#ifdef YOSYS_XTRACE_GET_PUT
+			if (yosys_xtrace) {
+				log("#X# GET-BY-INDEX '%s' (index %d, refcount %d)\n", global_id_storage_.at(idx), idx, global_refcount_storage_.at(idx));
+			}
+		#endif
 			return idx;
 		}
 
@@ -107,6 +144,11 @@ namespace RTLIL
 			auto it = global_id_index_.find((char*)p);
 			if (it != global_id_index_.end()) {
 				global_refcount_storage_.at(it->second)++;
+		#ifdef YOSYS_XTRACE_GET_PUT
+				if (yosys_xtrace) {
+					log("#X# GET-BY-NAME '%s' (index %d, refcount %d)\n", global_id_storage_.at(it->second), it->second, global_refcount_storage_.at(it->second));
+				}
+		#endif
 				return it->second;
 			}
 
@@ -124,16 +166,22 @@ namespace RTLIL
 			global_refcount_storage_.at(idx)++;
 
 			// Avoid Create->Delete->Create pattern
-			static IdString last_created_id;
+			if (last_created_idx_[last_created_idx_ptr_])
-			put_reference(last_created_id.index_);
+				put_reference(last_created_idx_[last_created_idx_ptr_]);
-			last_created_id.index_ = idx;
+			last_created_idx_[last_created_idx_ptr_] = idx;
-			get_reference(last_created_id.index_);
+			get_reference(last_created_idx_[last_created_idx_ptr_]);
+			last_created_idx_ptr_ = (last_created_idx_ptr_ + 1) & 7;
 
 			if (yosys_xtrace) {
 				log("#X# New IdString '%s' with index %d.\n", p, idx);
 				log_backtrace("-X- ", yosys_xtrace-1);
 			}
 
+		#ifdef YOSYS_XTRACE_GET_PUT
+			if (yosys_xtrace) {
+				log("#X# GET-BY-NAME '%s' (index %d, refcount %d)\n", global_id_storage_.at(idx), idx, global_refcount_storage_.at(idx));
+			}
+		#endif
 			return idx;
 		}
 
@@ -144,6 +192,12 @@ namespace RTLIL
 			if (!destruct_guard.ok)
 				return;
 
+		#ifdef YOSYS_XTRACE_GET_PUT
+			if (yosys_xtrace) {
+				log("#X# PUT '%s' (index %d, refcount %d)\n", global_id_storage_.at(idx), idx, global_refcount_storage_.at(idx));
+			}
+		#endif
+
 			log_assert(global_refcount_storage_.at(idx) > 0);
 
 			if (--global_refcount_storage_.at(idx) != 0)
@@ -1282,7 +1336,7 @@ inline bool RTLIL::SigBit::operator<(const RTLIL::SigBit &other) const {
 		return wire ? (offset < other.offset) : (data < other.data);
 	if (wire != nullptr && other.wire != nullptr)
 		return wire->name < other.wire->name;
-	return wire < other.wire;
+	return (wire != nullptr) < (other.wire != nullptr);
 }
 
 inline bool RTLIL::SigBit::operator==(const RTLIL::SigBit &other) const {

kernel/yosys.cc

@@ -33,7 +33,7 @@
 #  include <dlfcn.h>
 #endif
 
-#ifdef _WIN32
+#if defined(_WIN32)
 #  include <windows.h>
 #  include <io.h>
 #elif defined(__APPLE__)
@@ -41,13 +41,15 @@
 #  include <unistd.h>
 #  include <dirent.h>
 #  include <sys/stat.h>
-#  include <glob.h>
 #else
 #  include <unistd.h>
 #  include <dirent.h>
 #  include <sys/types.h>
 #  include <sys/wait.h>
 #  include <sys/stat.h>
+#endif
+
+#if !defined(_WIN32) && defined(YOSYS_ENABLE_GLOB)
 #  include <glob.h>
 #endif
 
@@ -216,12 +218,18 @@ std::string next_token(std::string &text, const char *sep, bool long_strings)
 
 	if (long_strings && pos_begin != text.size() && text[pos_begin] == '"') {
 		string sep_string = sep;
-		for (size_t i = pos_begin+1; i < text.size(); i++)
+		for (size_t i = pos_begin+1; i < text.size(); i++) {
 			if (text[i] == '"' && (i+1 == text.size() || sep_string.find(text[i+1]) != std::string::npos)) {
 				std::string token = text.substr(pos_begin, i-pos_begin+1);
 				text = text.substr(i+1);
 				return token;
 			}
+			if (i+1 < text.size() && text[i] == '"' && text[i+1] == ';' && (i+2 == text.size() || sep_string.find(text[i+2]) != std::string::npos)) {
+				std::string token = text.substr(pos_begin, i-pos_begin+1);
+				text = text.substr(i+2);
+				return token + ";";
+			}
+		}
 	}
 
 	size_t pos_end = text.find_first_of(sep, pos_begin);
@@ -564,7 +572,7 @@ std::vector<std::string> glob_filename(const std::string &filename_pattern)
 {
 	std::vector<std::string> results;
 
-#ifdef _WIN32
+#if defined(_WIN32) || !defined(YOSYS_ENABLE_GLOB)
 	results.push_back(filename_pattern);
 #else
 	glob_t globbuf;

misc/launcher.c

@@ -0,0 +1,358 @@
+/* This file comes from the PyPA Setuptools repository, commit 16e452a:
+https://github.com/pypa/setuptools
+Modifications include this comment and inline inclusion of the LICENSE text. */
+
+/* Copyright (C) 2016 Jason R Coombs <jaraco@jaraco.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE. */
+
+/*  Setuptools Script Launcher for Windows
+
+    This is a stub executable for Windows that functions somewhat like
+    Effbot's "exemaker", in that it runs a script with the same name but
+    a .py extension, using information from a #! line.  It differs in that
+    it spawns the actual Python executable, rather than attempting to
+    hook into the Python DLL.  This means that the script will run with
+    sys.executable set to the Python executable, where exemaker ends up with
+    sys.executable pointing to itself.  (Which means it won't work if you try
+    to run another Python process using sys.executable.)
+
+    To build/rebuild with mingw32, do this in the setuptools project directory:
+
+       gcc -DGUI=0           -mno-cygwin -O -s -o setuptools/cli.exe launcher.c
+       gcc -DGUI=1 -mwindows -mno-cygwin -O -s -o setuptools/gui.exe launcher.c
+
+    To build for Windows RT, install both Visual Studio Express for Windows 8
+    and for Windows Desktop (both freeware), create "win32" application using
+    "Windows Desktop" version, create new "ARM" target via
+    "Configuration Manager" menu and modify ".vcxproj" file by adding
+    "<WindowsSDKDesktopARMSupport>true</WindowsSDKDesktopARMSupport>" tag
+    as child of "PropertyGroup" tags that has "Debug|ARM" and "Release|ARM"
+    properties.
+
+    It links to msvcrt.dll, but this shouldn't be a problem since it doesn't
+    actually run Python in the same process.  Note that using 'exec' instead
+    of 'spawn' doesn't work, because on Windows this leads to the Python
+    executable running in the *background*, attached to the same console
+    window, meaning you get a command prompt back *before* Python even finishes
+    starting.  So, we have to use spawnv() and wait for Python to exit before
+    continuing.  :(
+*/
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <windows.h>
+#include <tchar.h>
+#include <fcntl.h>
+
+int child_pid=0;
+
+int fail(char *format, char *data) {
+    /* Print error message to stderr and return 2 */
+    fprintf(stderr, format, data);
+    return 2;
+}
+
+char *quoted(char *data) {
+    int i, ln = strlen(data), nb;
+
+    /* We allocate twice as much space as needed to deal with worse-case
+       of having to escape everything. */
+    char *result = calloc(ln*2+3, sizeof(char));
+    char *presult = result;
+
+    *presult++ = '"';
+    for (nb=0, i=0; i < ln; i++)
+      {
+        if (data[i] == '\\')
+          nb += 1;
+        else if (data[i] == '"')
+          {
+            for (; nb > 0; nb--)
+              *presult++ = '\\';
+            *presult++ = '\\';
+          }
+        else
+          nb = 0;
+        *presult++ = data[i];
+      }
+
+    for (; nb > 0; nb--)        /* Deal w trailing slashes */
+      *presult++ = '\\';
+
+    *presult++ = '"';
+    *presult++ = 0;
+    return result;
+}
+
+
+
+
+
+
+
+
+
+
+char *loadable_exe(char *exename) {
+    /* HINSTANCE hPython;  DLL handle for python executable */
+    char *result;
+
+    /* hPython = LoadLibraryEx(exename, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
+    if (!hPython) return NULL; */
+
+    /* Return the absolute filename for spawnv */
+    result = calloc(MAX_PATH, sizeof(char));
+    strncpy(result, exename, MAX_PATH);
+    /*if (result) GetModuleFileNameA(hPython, result, MAX_PATH);
+
+    FreeLibrary(hPython); */
+    return result;
+}
+
+
+char *find_exe(char *exename, char *script) {
+    char drive[_MAX_DRIVE], dir[_MAX_DIR], fname[_MAX_FNAME], ext[_MAX_EXT];
+    char path[_MAX_PATH], c, *result;
+
+    /* convert slashes to backslashes for uniform search below */
+    result = exename;
+    while (c = *result++) if (c=='/') result[-1] = '\\';
+
+    _splitpath(exename, drive, dir, fname, ext);
+    if (drive[0] || dir[0]=='\\') {
+        return loadable_exe(exename);   /* absolute path, use directly */
+    }
+    /* Use the script's parent directory, which should be the Python home
+       (This should only be used for bdist_wininst-installed scripts, because
+        easy_install-ed scripts use the absolute path to python[w].exe
+    */
+    _splitpath(script, drive, dir, fname, ext);
+    result = dir + strlen(dir) -1;
+    if (*result == '\\') result--;
+    while (*result != '\\' && result>=dir) *result-- = 0;
+    _makepath(path, drive, dir, exename, NULL);
+    return loadable_exe(path);
+}
+
+
+char **parse_argv(char *cmdline, int *argc)
+{
+    /* Parse a command line in-place using MS C rules */
+
+    char **result = calloc(strlen(cmdline), sizeof(char *));
+    char *output = cmdline;
+    char c;
+    int nb = 0;
+    int iq = 0;
+    *argc = 0;
+
+    result[0] = output;
+    while (isspace(*cmdline)) cmdline++;   /* skip leading spaces */
+
+    do {
+        c = *cmdline++;
+        if (!c || (isspace(c) && !iq)) {
+            while (nb) {*output++ = '\\'; nb--; }
+            *output++ = 0;
+            result[++*argc] = output;
+            if (!c) return result;
+            while (isspace(*cmdline)) cmdline++;  /* skip leading spaces */
+            if (!*cmdline) return result;  /* avoid empty arg if trailing ws */
+            continue;
+        }
+        if (c == '\\')
+            ++nb;   /* count \'s */
+        else {
+            if (c == '"') {
+                if (!(nb & 1)) { iq = !iq; c = 0; }  /* skip " unless odd # of \ */
+                nb = nb >> 1;   /* cut \'s in half */
+            }
+            while (nb) {*output++ = '\\'; nb--; }
+            if (c) *output++ = c;
+        }
+    } while (1);
+}
+
+void pass_control_to_child(DWORD control_type) {
+    /*
+     * distribute-issue207
+     * passes the control event to child process (Python)
+     */
+    if (!child_pid) {
+        return;
+    }
+    GenerateConsoleCtrlEvent(child_pid,0);
+}
+
+BOOL control_handler(DWORD control_type) {
+    /*
+     * distribute-issue207
+     * control event handler callback function
+     */
+    switch (control_type) {
+        case CTRL_C_EVENT:
+            pass_control_to_child(0);
+            break;
+    }
+    return TRUE;
+}
+
+int create_and_wait_for_subprocess(char* command) {
+    /*
+     * distribute-issue207
+     * launches child process (Python)
+     */
+    DWORD return_value = 0;
+    LPSTR commandline = command;
+    STARTUPINFOA s_info;
+    PROCESS_INFORMATION p_info;
+    ZeroMemory(&p_info, sizeof(p_info));
+    ZeroMemory(&s_info, sizeof(s_info));
+    s_info.cb = sizeof(STARTUPINFO);
+    // set-up control handler callback funciotn
+    SetConsoleCtrlHandler((PHANDLER_ROUTINE) control_handler, TRUE);
+    if (!CreateProcessA(NULL, commandline, NULL, NULL, TRUE, 0, NULL, NULL, &s_info, &p_info)) {
+        fprintf(stderr, "failed to create process.\n");
+        return 0;
+    }
+    child_pid = p_info.dwProcessId;
+    // wait for Python to exit
+    WaitForSingleObject(p_info.hProcess, INFINITE);
+    if (!GetExitCodeProcess(p_info.hProcess, &return_value)) {
+        fprintf(stderr, "failed to get exit code from process.\n");
+        return 0;
+    }
+    return return_value;
+}
+
+char* join_executable_and_args(char *executable, char **args, int argc)
+{
+    /*
+     * distribute-issue207
+     * CreateProcess needs a long string of the executable and command-line arguments,
+     * so we need to convert it from the args that was built
+     */
+    int len,counter;
+    char* cmdline;
+
+    len=strlen(executable)+2;
+    for (counter=1; counter<argc; counter++) {
+        len+=strlen(args[counter])+1;
+    }
+
+    cmdline = (char*)calloc(len, sizeof(char));
+    sprintf(cmdline, "%s", executable);
+    len=strlen(executable);
+    for (counter=1; counter<argc; counter++) {
+        sprintf(cmdline+len, " %s", args[counter]);
+        len+=strlen(args[counter])+1;
+    }
+    return cmdline;
+}
+
+int run(int argc, char **argv, int is_gui) {
+
+    char python[256];   /* python executable's filename*/
+    char *pyopt;        /* Python option */
+    char script[256];   /* the script's filename */
+
+    int scriptf;        /* file descriptor for script file */
+
+    char **newargs, **newargsp, **parsedargs; /* argument array for exec */
+    char *ptr, *end;    /* working pointers for string manipulation */
+    char *cmdline;
+    int i, parsedargc;              /* loop counter */
+
+    /* compute script name from our .exe name*/
+    GetModuleFileNameA(NULL, script, sizeof(script));
+    end = script + strlen(script);
+    while( end>script && *end != '.')
+        *end-- = '\0';
+    *end-- = '\0';
+    strcat(script, (GUI ? "-script.pyw" : "-script.py"));
+
+    /* figure out the target python executable */
+
+    scriptf = open(script, O_RDONLY);
+    if (scriptf == -1) {
+        return fail("Cannot open %s\n", script);
+    }
+    end = python + read(scriptf, python, sizeof(python));
+    close(scriptf);
+
+    ptr = python-1;
+    while(++ptr < end && *ptr && *ptr!='\n' && *ptr!='\r') {;}
+
+    *ptr-- = '\0';
+
+    if (strncmp(python, "#!", 2)) {
+        /* default to python.exe if no #! header */
+        strcpy(python, "#!python.exe");
+    }
+
+    parsedargs = parse_argv(python+2, &parsedargc);
+
+    /* Using spawnv() can fail strangely if you e.g. find the Cygwin
+       Python, so we'll make sure Windows can find and load it */
+
+    ptr = find_exe(parsedargs[0], script);
+    if (!ptr) {
+        return fail("Cannot find Python executable %s\n", parsedargs[0]);
+    }
+
+    /* printf("Python executable: %s\n", ptr); */
+
+    /* Argument array needs to be
+       parsedargc + argc, plus 1 for null sentinel */
+
+    newargs = (char **)calloc(parsedargc + argc + 1, sizeof(char *));
+    newargsp = newargs;
+
+    *newargsp++ = quoted(ptr);
+    for (i = 1; i<parsedargc; i++) *newargsp++ = quoted(parsedargs[i]);
+
+    *newargsp++ = quoted(script);
+    for (i = 1; i < argc; i++)     *newargsp++ = quoted(argv[i]);
+
+    *newargsp++ = NULL;
+
+    /* printf("args 0: %s\nargs 1: %s\n", newargs[0], newargs[1]); */
+
+    if (is_gui) {
+        /* Use exec, we don't need to wait for the GUI to finish */
+        execv(ptr, (const char * const *)(newargs));
+        return fail("Could not exec %s", ptr);   /* shouldn't get here! */
+    }
+
+    /*
+     * distribute-issue207: using CreateProcessA instead of spawnv
+     */
+    cmdline = join_executable_and_args(ptr, newargs, parsedargc + argc);
+    return create_and_wait_for_subprocess(cmdline);
+}
+
+int WINAPI WinMain(HINSTANCE hI, HINSTANCE hP, LPSTR lpCmd, int nShow) {
+    return run(__argc, __argv, GUI);
+}
+
+int main(int argc, char** argv) {
+    return run(argc, argv, GUI);
+}

passes/cmds/setundef.cc

@@ -143,6 +143,9 @@ struct SetundefPass : public Pass {
 		log("    -init\n");
 		log("        also create/update init values for flip-flops\n");
 		log("\n");
+		log("    -params\n");
+		log("        replace undef in cell parameters\n");
+		log("\n");
 	}
 	void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
 	{
@@ -150,6 +153,7 @@ struct SetundefPass : public Pass {
 		bool undriven_mode = false;
 		bool expose_mode = false;
 		bool init_mode = false;
+		bool params_mode = false;
 		SetundefWorker worker;
 
 		log_header(design, "Executing SETUNDEF pass (replace undef values with defined constants).\n");
@@ -199,6 +203,10 @@ struct SetundefPass : public Pass {
 				init_mode = true;
 				continue;
 			}
+			if (args[argidx] == "-params") {
+				params_mode = true;
+				continue;
+			}
 			if (args[argidx] == "-random" && !got_value && argidx+1 < args.size()) {
 				got_value = true;
 				worker.next_bit_mode = MODE_RANDOM;
@@ -228,6 +236,18 @@ struct SetundefPass : public Pass {
 
 		for (auto module : design->selected_modules())
 		{
+			if (params_mode)
+			{
+				for (auto *cell : module->selected_cells()) {
+					for (auto &parameter : cell->parameters) {
+						for (auto &bit : parameter.second.bits) {
+							if (bit > RTLIL::State::S1)
+								bit = worker.next_bit();
+						}
+					}
+				}
+			}
+
 			if (undriven_mode)
 			{
 				if (!module->processes.empty())

passes/hierarchy/hierarchy.cc

@@ -140,6 +140,23 @@ void generate(RTLIL::Design *design, const std::vector<std::string> &celltypes,
 	}
 }
 
+// Return the "basic" type for an array item.
+std::string basic_cell_type(const std::string celltype, int pos[3] = nullptr) {
+	std::string basicType = celltype;
+	if (celltype.substr(0, 7) == "$array:") {
+		int pos_idx = celltype.find_first_of(':');
+		int pos_num = celltype.find_first_of(':', pos_idx + 1);
+		int pos_type = celltype.find_first_of(':', pos_num + 1);
+		basicType = celltype.substr(pos_type + 1);
+		if (pos != nullptr) {
+			pos[0] = pos_idx;
+			pos[1] = pos_num;
+			pos[2] = pos_type;
+		}
+	}
+	return basicType;
+}
+
 bool expand_module(RTLIL::Design *design, RTLIL::Module *module, bool flag_check, bool flag_simcheck, std::vector<std::string> &libdirs)
 {
 	bool did_something = false;
@@ -178,9 +195,11 @@ bool expand_module(RTLIL::Design *design, RTLIL::Module *module, bool flag_check
 		std::vector<RTLIL::SigSpec> connections_to_add_signal;
 
 		if (cell->type.substr(0, 7) == "$array:") {
-			int pos_idx = cell->type.str().find_first_of(':');
+			int pos[3];
-			int pos_num = cell->type.str().find_first_of(':', pos_idx + 1);
+			basic_cell_type(cell->type.str(), pos);
-			int pos_type = cell->type.str().find_first_of(':', pos_num + 1);
+			int pos_idx = pos[0];
+			int pos_num = pos[1];
+			int pos_type = pos[2];
 			int idx = atoi(cell->type.str().substr(pos_idx + 1, pos_num).c_str());
 			int num = atoi(cell->type.str().substr(pos_num + 1, pos_type).c_str());
 			array_cells[cell] = std::pair<int, int>(idx, num);
@@ -439,10 +458,7 @@ void hierarchy_worker(RTLIL::Design *design, std::set<RTLIL::Module*, IdString::
 	for (auto cell : mod->cells()) {
 		std::string celltype = cell->type.str();
 		if (celltype.substr(0, 7) == "$array:") {
-			int pos_idx = celltype.find_first_of(':');
+			celltype = basic_cell_type(celltype);
-			int pos_num = celltype.find_first_of(':', pos_idx + 1);
-			int pos_type = celltype.find_first_of(':', pos_num + 1);
-			celltype = celltype.substr(pos_type + 1);
 		}
 		if (design->module(celltype))
 			hierarchy_worker(design, used, design->module(celltype), indent+4);
@@ -502,9 +518,19 @@ int find_top_mod_score(Design *design, Module *module, dict<Module*, int> &db)
 	if (db.count(module) == 0) {
 		int score = 0;
 		db[module] = 0;
-		for (auto cell : module->cells())
+		for (auto cell : module->cells()) {
-			if (design->module(cell->type))
+			std::string celltype = cell->type.str();
-				score = max(score, find_top_mod_score(design, design->module(cell->type), db) + 1);
+			// Is this an array instance
+			if (celltype.substr(0, 7) == "$array:") {
+				celltype = basic_cell_type(celltype);
+			}
+			// Is this cell a module instance?
+			auto instModule = design->module(celltype);
+			// If there is no instance for this, issue a warning.
+			if (instModule != nullptr) {
+				score = max(score, find_top_mod_score(design, instModule, db) + 1);
+			}
+		}
 		db[module] = score;
 	}
 	return db.at(module);
@@ -884,7 +910,7 @@ struct HierarchyPass : public Pass {
 			if (m == nullptr)
 				continue;
 
-			if (m->get_bool_attribute("\\blackbox") && !cell->parameters.empty()) {
+			if (m->get_bool_attribute("\\blackbox") && !cell->parameters.empty() && m->get_bool_attribute("\\dynports")) {
 				IdString new_m_name = m->derive(design, cell->parameters, true);
 				if (new_m_name.empty())
 					continue;

passes/opt/opt_expr.cc

@@ -155,6 +155,13 @@ bool group_cell_inputs(RTLIL::Module *module, RTLIL::Cell *cell, bool commutativ
 			new_b.append_bit(it.first.second);
 		}
 
+		if (cell->type.in("$and", "$or") && i == GRP_CONST_A) {
+			log("  Direct Connection: %s (%s with %s)\n", log_signal(new_b), log_id(cell->type), log_signal(new_a));
+			module->connect(new_y, new_b);
+			module->connect(new_conn);
+			continue;
+		}
+
 		RTLIL::Cell *c = module->addCell(NEW_ID, cell->type);
 
 		c->setPort("\\A", new_a);

passes/opt/opt_rmdff.cc

@@ -174,8 +174,6 @@ bool handle_dffsr(RTLIL::Module *mod, RTLIL::Cell *cell)
 			cell->unsetParam("\\CLR_POLARITY");
 			cell->unsetPort("\\SET");
 			cell->unsetPort("\\CLR");
-
-			return true;
 		}
 		else
 		{
@@ -186,11 +184,12 @@ bool handle_dffsr(RTLIL::Module *mod, RTLIL::Cell *cell)
 			cell->unsetParam("\\CLR_POLARITY");
 			cell->unsetPort("\\SET");
 			cell->unsetPort("\\CLR");
+		}
 
 		return true;
 	}
-	}
+
-	else
+	if (!hasreset)
 	{
 		IdString new_type;
 
@@ -207,8 +206,10 @@ bool handle_dffsr(RTLIL::Module *mod, RTLIL::Cell *cell)
 		cell->unsetPort("\\S");
 		cell->unsetPort("\\R");
 
-		return did_something;
+		return true;
 	}
+
+	return did_something;
 }
 
 bool handle_dlatch(RTLIL::Module *mod, RTLIL::Cell *dlatch)

passes/opt/wreduce.cc

@@ -38,7 +38,8 @@ struct WreduceConfig
 			"$shl", "$shr", "$sshl", "$sshr", "$shift", "$shiftx",
 			"$lt", "$le", "$eq", "$ne", "$eqx", "$nex", "$ge", "$gt",
 			"$add", "$sub", "$mul", // "$div", "$mod", "$pow",
-			"$mux", "$pmux"
+			"$mux", "$pmux",
+			"$dff", "$adff"
 		});
 	}
 };
@@ -52,6 +53,7 @@ struct WreduceWorker
 	std::set<Cell*, IdString::compare_ptr_by_name<Cell>> work_queue_cells;
 	std::set<SigBit> work_queue_bits;
 	pool<SigBit> keep_bits;
+	dict<SigBit, State> init_bits;
 
 	WreduceWorker(WreduceConfig *config, Module *module) :
 			config(config), module(module), mi(module) { }
@@ -134,6 +136,88 @@ struct WreduceWorker
 		module->connect(sig_y.extract(n_kept, n_removed), sig_removed);
 	}
 
+	void run_cell_dff(Cell *cell)
+	{
+		// Reduce size of FF if inputs are just sign/zero extended or output bit is not used
+
+		SigSpec sig_d = mi.sigmap(cell->getPort("\\D"));
+		SigSpec sig_q = mi.sigmap(cell->getPort("\\Q"));
+		Const initval;
+
+		int width_before = GetSize(sig_q);
+
+		if (width_before == 0)
+			return;
+
+		bool zero_ext = sig_d[GetSize(sig_d)-1] == State::S0;
+		bool sign_ext = !zero_ext;
+
+		for (int i = 0; i < GetSize(sig_q); i++) {
+			SigBit bit = sig_q[i];
+			if (init_bits.count(bit))
+				initval.bits.push_back(init_bits.at(bit));
+			else
+				initval.bits.push_back(State::Sx);
+		}
+
+		for (int i = GetSize(sig_q)-1; i >= 0; i--)
+		{
+			if (zero_ext && sig_d[i] == State::S0 && (initval[i] == State::S0 || initval[i] == State::Sx)) {
+				module->connect(sig_q[i], State::S0);
+				sig_d.remove(i);
+				sig_q.remove(i);
+				continue;
+			}
+
+			if (sign_ext && i > 0 && sig_d[i] == sig_d[i-1] && initval[i] == initval[i-1]) {
+				module->connect(sig_q[i], sig_q[i-1]);
+				sig_d.remove(i);
+				sig_q.remove(i);
+				continue;
+			}
+
+			auto info = mi.query(sig_q[i]);
+			if (!info->is_output && GetSize(info->ports) == 1 && !keep_bits.count(mi.sigmap(sig_q[i]))) {
+				sig_d.remove(i);
+				sig_q.remove(i);
+				zero_ext = false;
+				sign_ext = false;
+				continue;
+			}
+
+			break;
+		}
+
+		if (width_before == GetSize(sig_q))
+			return;
+
+		if (GetSize(sig_q) == 0) {
+			log("Removed cell %s.%s (%s).\n", log_id(module), log_id(cell), log_id(cell->type));
+			module->remove(cell);
+			return;
+		}
+
+		log("Removed top %d bits (of %d) from FF cell %s.%s (%s).\n", width_before - GetSize(sig_q), width_before,
+				log_id(module), log_id(cell), log_id(cell->type));
+
+		for (auto bit : sig_d)
+			work_queue_bits.insert(bit);
+
+		for (auto bit : sig_q)
+			work_queue_bits.insert(bit);
+
+		// Narrow ARST_VALUE parameter to new size.
+		if (cell->parameters.count("\\ARST_VALUE")) {
+			Const arst_value = cell->getParam("\\ARST_VALUE");
+			arst_value.bits.resize(GetSize(sig_q));
+			cell->setParam("\\ARST_VALUE", arst_value);
+		}
+
+		cell->setPort("\\D", sig_d);
+		cell->setPort("\\Q", sig_q);
+		cell->fixup_parameters();
+	}
+
 	void run_reduce_inport(Cell *cell, char port, int max_port_size, bool &port_signed, bool &did_something)
 	{
 		port_signed = cell->getParam(stringf("\\%c_SIGNED", port)).as_bool();
@@ -176,6 +260,9 @@ struct WreduceWorker
 		if (cell->type.in("$mux", "$pmux"))
 			return run_cell_mux(cell);
 
+		if (cell->type.in("$dff", "$adff"))
+			return run_cell_dff(cell);
+
 		SigSpec sig = mi.sigmap(cell->getPort("\\Y"));
 
 		if (sig.has_const())
@@ -300,10 +387,18 @@ struct WreduceWorker
 
 	void run()
 	{
-		for (auto w : module->wires())
+		for (auto w : module->wires()) {
 			if (w->get_bool_attribute("\\keep"))
 				for (auto bit : mi.sigmap(w))
 					keep_bits.insert(bit);
+			if (w->attributes.count("\\init")) {
+				Const initval = w->attributes.at("\\init");
+				SigSpec initsig = mi.sigmap(w);
+				int width = std::min(GetSize(initval), GetSize(initsig));
+				for (int i = 0; i < width; i++)
+					init_bits[initsig[i]] = initval[i];
+			}
+		}
 
 		for (auto c : module->selected_cells())
 			work_queue_cells.insert(c);

passes/pmgen/.gitignore

@@ -0,0 +1 @@
+/ice40_dsp_pm.h

passes/pmgen/Makefile.inc

@@ -0,0 +1,8 @@
+OBJS += passes/pmgen/ice40_dsp.o
+
+passes/pmgen/ice40_dsp.o: passes/pmgen/ice40_dsp_pm.h
+EXTRA_OBJS += passes/pmgen/ice40_dsp_pm.h
+.SECONDARY: passes/pmgen/ice40_dsp_pm.h
+
+passes/pmgen/ice40_dsp_pm.h: passes/pmgen/pmgen.py passes/pmgen/ice40_dsp.pmg
+	$(P) mkdir -p passes/pmgen && python3 $^ $@

passes/pmgen/README.md

@@ -0,0 +1,224 @@
+Pattern Matcher Generator
+=========================
+
+The program `pmgen.py` reads a `.pmg` (Pattern Matcher Generator) file and
+writes a header-only C++ library that implements that pattern matcher.
+
+The "patterns" in this context are subgraphs in a Yosys RTLIL netlist.
+
+The algorithm used in the generated pattern matcher is a simple recursive
+search with backtracking. It is left to the author of the `.pmg` file to
+determine an efficient cell order for the search that allows for maximum
+use of indices and early backtracking.
+
+
+API of Generated Matcher
+========================
+
+When `pmgen.py` reads a `foobar.pmg` file, it writes `foobar_pm.h` containing
+a class `foobar_pm`. That class is instantiated with an RTLIL module and a
+list of cells from that module:
+
+    foobar_pm pm(module, module->selected_cells());
+
+The caller must make sure that none of the cells in the 2nd argument are
+deleted for as long as the patter matcher instance is used.
+
+At any time it is possible to disable cells, preventing them from showing
+up in any future matches:
+
+    pm.blacklist(some_cell);
+
+The `.run(callback_function)` method searches for all matches and calls the
+callback function for each found match:
+
+    pm.run([&](){
+        log("found matching 'foo' cell: %s\n", log_id(pm.st.foo));
+        log("          with 'bar' cell: %s\n", log_id(pm.st.bar));
+    });
+
+The `.pmg` file declares matcher state variables that are accessible via the
+`.st.<state_name>` members. (The `.st` member is of type `foobar_pm::state_t`.)
+
+Similarly the `.pmg` file declares user data variables that become members of
+`.ud`, a struct of type `foobar_pm::udata_t`.
+
+
+The .pmg File Format
+====================
+
+The `.pmg` file format is a simple line-based file format. For the most part
+lines consist of whitespace-separated tokens.
+
+Lines in `.pmg` files starting with `//` are comments.
+
+Declaring state variables
+-------------------------
+
+One or more state variables can be declared using the `state` statement,
+followed by a C++ type in angle brackets, followed by a whitespace separated
+list of variable names. For example:
+
+    state <bool> flag1 flag2 happy big
+    state <SigSpec> sigA sigB sigY
+
+State variables are automatically managed by the generated backtracking algorithm
+and saved and restored as needed.
+
+They are automatically initialized to the default constructed value of their type
+when `.run(callback_function)` is called.
+
+Declaring udata variables
+-------------------------
+
+Udata (user-data) variables can be used for example to configure the matcher or
+the callback function used to perform actions on found matches.
+
+There is no automatic management of udata variables. For this reason it is
+recommended that the user-supplied matcher code treats them as read-only
+variables.
+
+They are declared like state variables, just using the `udata` statement:
+
+    udata <int> min_data_width max_data_width
+    udata <IdString> data_port_name
+
+They are atomatically initialzed to the default constructed value of their type
+when ther pattern matcher object is constructed.
+
+Embedded C++ code
+-----------------
+
+Many statements in a `.pmg` file contain C++ code. However, there are some
+slight additions to regular C++/Yosys/RTLIL code that make it a bit easier to
+write matchers:
+
+- Identifiers starting with a dollar sign or backslash are automatically
+  converted to special IdString variables that are initialized when the
+  matcher object is constructed.
+
+- The `port(<cell>, <portname>)` function is a handy alias for
+  `sigmap(<cell>->getPort(<portname>))`.
+
+- Similarly `param(<cell>, <paramname>)` looks up a parameter on a cell.
+
+- The function `nusers(<sigspec>)` returns the number of different cells
+  connected to any of the given signal bits, plus one if any of the signal
+  bits is also a primary input or primary output.
+
+- In `code..endcode` blocks there exist `accept`, `reject`, and `branch`
+  statements.
+
+- In `index` statements there is a special `===` operator for the index
+  lookup.
+
+Matching cells
+--------------
+
+Cells are matched using `match..endmatch` blocks. For example:
+
+    match mul
+        if ff
+        select mul->type == $mul
+        select nusers(port(mul, \Y) == 2
+        index <SigSpec> port(mul, \Y) === port(ff, \D)
+        filter some_weird_function(mul) < other_weird_function(ff)
+        optional
+    endmatch
+
+A `match` block starts with `match <statevar>` and implicitly generates
+a state variable `<statevar>` of type `RTLIL::Cell*`.
+
+All statements in the match block are optional. (An empty match block
+would simply match each and every cell in the module.)
+
+The `if <expression>` statement makes the match block conditional. If
+`<expression>` evaluates to `false` then the match block will be ignored
+and the corresponding state variable is set to `nullptr`. In our example
+we only try to match the `mul` cell if the `ff` state variable points
+to a cell. (Presumably `ff` is provided by a prior `match` block.)
+
+The `select` lines are evaluated once for each cell when the matcher is
+initialized. A `match` block will only consider cells for which all `select`
+expressions evaluated to `true`. Note that the state variable corresponding to
+the match (in the example `mul`) is the only state variable that may be used
+in `select` lines.
+
+Index lines are using the `index <type> expr1 === expr2` syntax.  `expr1` is
+evaluated during matcher initialization and the same restrictions apply as for
+`select` expressions. `expr2` is evaluated when the match is calulated. It is a
+function of any state variables assigned to by previous blocks. Both expression
+are converted to the given type and compared for equality. Only cells for which
+all `index` statements in the block pass are considered by the match.
+
+Note that `select` and `index` are fast operations. Thus `select` and `index`
+should be used whenever possible to create efficient matchers.
+
+Finally, `filter <expression>` narrows down the remaining list of cells. For
+performance reasons `filter` statements should only be used for things that
+can't be done using `select` and `index`.
+
+The `optional` statement marks optional matches. I.e. the matcher will also
+explore the case where `mul` is set to `nullptr`. Without the `optional`
+statement a match may only be assigned nullptr when one of the `if` expressions
+evaluates to `false`.
+
+Additional code
+---------------
+
+Interleaved with `match..endmatch` blocks there may be `code..endcode` blocks.
+Such a block starts with the keyword `code` followed by a list of state variables
+that the block may modify. For example:
+
+    code addAB sigS
+        if (addA) {
+            addAB = addA;
+            sigS = port(addA, \B);
+        }
+        if (addB) {
+            addAB = addB;
+            sigS = port(addB, \A);
+        }
+    endcode
+
+The special keyword `reject` can be used to reject the current state and
+backtrack. For example:
+
+    code
+        if (ffA && ffB) {
+            if (port(ffA, \CLK) != port(ffB, \CLK))
+                reject;
+            if (param(ffA, \CLK_POLARITY) != param(ffB, \CLK_POLARITY))
+                reject;
+        }
+    endcode
+
+Similarly, the special keyword `accept` can be used to accept the current
+state. (`accept` will not backtrack. This means it continues with the current
+branch and may accept a larger match later.)
+
+The special keyword `branch` can be used to explore different cases. Note that
+each code block has an implicit `branch` at the end. So most use-cases of the
+`branch` keyword need to end the block with `reject` to avoid the implicit
+branch at the end. For example:
+
+    state <int> mode
+
+    code mode
+        for (mode = 0; mode < 8; mode++)
+            branch;
+        reject;
+    endcode
+
+But in some cases it is more natural to utilize the implicit branch statement:
+
+    state <IdString> portAB
+
+    code portAB
+        portAB = \A;
+        branch;
+        portAB = \B;
+    endcode
+
+There is an implicit `code..endcode` block at the end of each `.pgm` file
+that just accepts everything that gets all the way there.

passes/pmgen/ice40_dsp.cc

@@ -0,0 +1,237 @@
+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "kernel/yosys.h"
+#include "kernel/sigtools.h"
+#include "passes/pmgen/ice40_dsp_pm.h"
+
+USING_YOSYS_NAMESPACE
+PRIVATE_NAMESPACE_BEGIN
+
+void create_ice40_dsp(ice40_dsp_pm &pm)
+{
+#if 0
+	log("\n");
+	log("ffA:   %s\n", log_id(pm.st.ffA, "--"));
+	log("ffB:   %s\n", log_id(pm.st.ffB, "--"));
+	log("mul:   %s\n", log_id(pm.st.mul, "--"));
+	log("ffY:   %s\n", log_id(pm.st.ffY, "--"));
+	log("addAB: %s\n", log_id(pm.st.addAB, "--"));
+	log("muxAB: %s\n", log_id(pm.st.muxAB, "--"));
+	log("ffS:   %s\n", log_id(pm.st.ffS, "--"));
+#endif
+
+	log("Checking %s.%s for iCE40 DSP inference.\n", log_id(pm.module), log_id(pm.st.mul));
+
+	if (GetSize(pm.st.sigA) > 16) {
+		log("  input A (%s) is too large (%d > 16).\n", log_signal(pm.st.sigA), GetSize(pm.st.sigA));
+		return;
+	}
+
+	if (GetSize(pm.st.sigB) > 16) {
+		log("  input B (%s) is too large (%d > 16).\n", log_signal(pm.st.sigB), GetSize(pm.st.sigB));
+		return;
+	}
+
+	if (GetSize(pm.st.sigS) > 32) {
+		log("  accumulator (%s) is too large (%d > 32).\n", log_signal(pm.st.sigS), GetSize(pm.st.sigS));
+		return;
+	}
+
+	if (GetSize(pm.st.sigY) > 32) {
+		log("  output (%s) is too large (%d > 32).\n", log_signal(pm.st.sigY), GetSize(pm.st.sigY));
+		return;
+	}
+
+	bool mul_signed = pm.st.mul->getParam("\\A_SIGNED").as_bool();
+
+	if (mul_signed) {
+		log("  inference of signed iCE40 DSP arithmetic is currently not supported.\n");
+		return;
+	}
+
+	log("  replacing $mul with SB_MAC16 cell.\n");
+
+	Cell *cell = pm.module->addCell(NEW_ID, "\\SB_MAC16");
+	pm.module->swap_names(cell, pm.st.mul);
+
+	// SB_MAC16 Input Interface
+
+	SigSpec A = pm.st.sigA;
+	A.extend_u0(16, mul_signed);
+
+	SigSpec B = pm.st.sigB;
+	B.extend_u0(16, mul_signed);
+
+	SigSpec CD;
+	if (pm.st.muxA)
+		CD = pm.st.muxA->getPort("\\B");
+	if (pm.st.muxB)
+		CD = pm.st.muxB->getPort("\\A");
+	CD.extend_u0(32, mul_signed);
+
+	cell->setPort("\\A", A);
+	cell->setPort("\\B", B);
+	cell->setPort("\\C", CD.extract(0, 16));
+	cell->setPort("\\D", CD.extract(16, 16));
+
+	cell->setParam("\\A_REG", pm.st.ffA ? State::S1 : State::S0);
+	cell->setParam("\\B_REG", pm.st.ffB ? State::S1 : State::S0);
+
+	cell->setPort("\\AHOLD", State::S0);
+	cell->setPort("\\BHOLD", State::S0);
+	cell->setPort("\\CHOLD", State::S0);
+	cell->setPort("\\DHOLD", State::S0);
+
+	cell->setPort("\\IRSTTOP", State::S0);
+	cell->setPort("\\IRSTBOT", State::S0);
+
+	if (pm.st.clock_vld)
+	{
+		cell->setPort("\\CLK", pm.st.clock);
+		cell->setPort("\\CE", State::S1);
+		cell->setParam("\\NEG_TRIGGER", pm.st.clock_pol ? State::S0 : State::S1);
+
+		log("  clock: %s (%s)", log_signal(pm.st.clock), pm.st.clock_pol ? "posedge" : "negedge");
+
+		if (pm.st.ffA)
+			log(" ffA:%s", log_id(pm.st.ffA));
+
+		if (pm.st.ffB)
+			log(" ffB:%s", log_id(pm.st.ffB));
+
+		if (pm.st.ffY)
+			log(" ffY:%s", log_id(pm.st.ffY));
+
+		if (pm.st.ffS)
+			log(" ffS:%s", log_id(pm.st.ffS));
+
+		log("\n");
+	}
+	else
+	{
+		cell->setPort("\\CLK", State::S0);
+		cell->setPort("\\CE", State::S0);
+		cell->setParam("\\NEG_TRIGGER", State::S0);
+	}
+
+	// SB_MAC16 Cascade Interface
+
+	cell->setPort("\\SIGNEXTIN", State::Sx);
+	cell->setPort("\\SIGNEXTOUT", pm.module->addWire(NEW_ID));
+
+	cell->setPort("\\CI", State::Sx);
+	cell->setPort("\\CO", pm.module->addWire(NEW_ID));
+
+	cell->setPort("\\ACCUMCI", State::Sx);
+	cell->setPort("\\ACCUMCO", pm.module->addWire(NEW_ID));
+
+	// SB_MAC16 Output Interface
+
+	SigSpec O = pm.st.ffS ? pm.st.sigS : pm.st.sigY;
+	if (GetSize(O) < 32)
+		O.append(pm.module->addWire(NEW_ID, 32-GetSize(O)));
+
+	cell->setPort("\\O", O);
+
+	if (pm.st.addAB) {
+		log("  accumulator %s (%s)\n", log_id(pm.st.addAB), log_id(pm.st.addAB->type));
+		cell->setPort("\\ADDSUBTOP", pm.st.addAB->type == "$add" ? State::S0 : State::S1);
+		cell->setPort("\\ADDSUBBOT", pm.st.addAB->type == "$add" ? State::S0 : State::S1);
+	} else {
+		cell->setPort("\\ADDSUBTOP", State::S0);
+		cell->setPort("\\ADDSUBBOT", State::S0);
+	}
+
+	cell->setPort("\\ORSTTOP", State::S0);
+	cell->setPort("\\ORSTBOT", State::S0);
+
+	cell->setPort("\\OHOLDTOP", State::S0);
+	cell->setPort("\\OHOLDBOT", State::S0);
+
+	SigSpec acc_reset = State::S0;
+	if (pm.st.muxA)
+		acc_reset = pm.st.muxA->getPort("\\S");
+	if (pm.st.muxB)
+		acc_reset = pm.module->Not(NEW_ID, pm.st.muxB->getPort("\\S"));
+
+	cell->setPort("\\OLOADTOP", acc_reset);
+	cell->setPort("\\OLOADBOT", acc_reset);
+
+	// SB_MAC16 Remaining Parameters
+
+	cell->setParam("\\C_REG", State::S0);
+	cell->setParam("\\D_REG", State::S0);
+
+	cell->setParam("\\TOP_8x8_MULT_REG", pm.st.ffY ? State::S1 : State::S0);
+	cell->setParam("\\BOT_8x8_MULT_REG", pm.st.ffY ? State::S1 : State::S0);
+	cell->setParam("\\PIPELINE_16x16_MULT_REG1", pm.st.ffY ? State::S1 : State::S0);
+	cell->setParam("\\PIPELINE_16x16_MULT_REG2", State::S0);
+
+	cell->setParam("\\TOPOUTPUT_SELECT", Const(pm.st.ffS ? 1 : 3, 2));
+	cell->setParam("\\TOPADDSUB_LOWERINPUT", Const(2, 2));
+	cell->setParam("\\TOPADDSUB_UPPERINPUT", State::S0);
+	cell->setParam("\\TOPADDSUB_CARRYSELECT", Const(3, 2));
+
+	cell->setParam("\\BOTOUTPUT_SELECT", Const(pm.st.ffS ? 1 : 3, 2));
+	cell->setParam("\\BOTADDSUB_LOWERINPUT", Const(2, 2));
+	cell->setParam("\\BOTADDSUB_UPPERINPUT", State::S0);
+	cell->setParam("\\BOTADDSUB_CARRYSELECT", Const(0, 2));
+
+	cell->setParam("\\MODE_8x8", State::S0);
+	cell->setParam("\\A_SIGNED", mul_signed ? State::S1 : State::S0);
+	cell->setParam("\\B_SIGNED", mul_signed ? State::S1 : State::S0);
+
+	pm.autoremove(pm.st.mul);
+	pm.autoremove(pm.st.ffY);
+	pm.autoremove(pm.st.ffS);
+}
+
+struct Ice40DspPass : public Pass {
+	Ice40DspPass() : Pass("ice40_dsp", "iCE40: map multipliers") { }
+	void help() YS_OVERRIDE
+	{
+		//   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
+		log("\n");
+		log("    ice40_dsp [options] [selection]\n");
+		log("\n");
+		log("Map multipliers and multiply-accumulate blocks to iCE40 DSP resources.\n");
+		log("\n");
+	}
+	void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
+	{
+		log_header(design, "Executing ICE40_DSP pass (map multipliers).\n");
+
+		size_t argidx;
+		for (argidx = 1; argidx < args.size(); argidx++)
+		{
+			// if (args[argidx] == "-singleton") {
+			// 	singleton_mode = true;
+			// 	continue;
+			// }
+			break;
+		}
+		extra_args(args, argidx, design);
+
+		for (auto module : design->selected_modules())
+			ice40_dsp_pm(module, module->selected_cells()).run(create_ice40_dsp);
+	}
+} Ice40DspPass;
+
+PRIVATE_NAMESPACE_END

passes/pmgen/ice40_dsp.pmg

@@ -0,0 +1,160 @@
+state <SigBit> clock
+state <bool> clock_pol clock_vld
+state <SigSpec> sigA sigB sigY sigS
+state <Cell*> addAB muxAB
+
+match mul
+	select mul->type.in($mul)
+	select GetSize(mul->getPort(\A)) + GetSize(mul->getPort(\B)) > 10
+	select GetSize(mul->getPort(\Y)) > 10
+endmatch
+
+match ffA
+	select ffA->type.in($dff)
+	// select nusers(port(ffA, \Q)) == 2
+	index <SigSpec> port(ffA, \Q) === port(mul, \A)
+	optional
+endmatch
+
+code sigA clock clock_pol clock_vld
+	sigA = port(mul, \A);
+
+	if (ffA) {
+		sigA = port(ffA, \D);
+
+		clock = port(ffA, \CLK).as_bit();
+		clock_pol = param(ffA, \CLK_POLARITY).as_bool();
+		clock_vld = true;
+	}
+endcode
+
+match ffB
+	select ffB->type.in($dff)
+	// select nusers(port(ffB, \Q)) == 2
+	index <SigSpec> port(ffB, \Q) === port(mul, \B)
+	optional
+endmatch
+
+code sigB clock clock_pol clock_vld
+	sigB = port(mul, \B);
+
+	if (ffB) {
+		sigB = port(ffB, \D);
+		SigBit c = port(ffB, \CLK).as_bit();
+		bool cp = param(ffB, \CLK_POLARITY).as_bool();
+
+		if (clock_vld && (c != clock || cp != clock_pol))
+			reject;
+
+		clock = c;
+		clock_pol = cp;
+		clock_vld = true;
+	}
+endcode
+
+match ffY
+	select ffY->type.in($dff)
+	select nusers(port(ffY, \D)) == 2
+	index <SigSpec> port(ffY, \D) === port(mul, \Y)
+	optional
+endmatch
+
+code sigY clock clock_pol clock_vld
+	sigY = port(mul, \Y);
+
+	if (ffY) {
+		sigY = port(ffY, \Q);
+		SigBit c = port(ffY, \CLK).as_bit();
+		bool cp = param(ffY, \CLK_POLARITY).as_bool();
+
+		if (clock_vld && (c != clock || cp != clock_pol))
+			reject;
+
+		clock = c;
+		clock_pol = cp;
+		clock_vld = true;
+	}
+endcode
+
+match addA
+	select addA->type.in($add)
+	select nusers(port(addA, \A)) == 2
+	index <SigSpec> port(addA, \A) === sigY
+	optional
+endmatch
+
+match addB
+	if !addA
+	select addB->type.in($add, $sub)
+	select nusers(port(addB, \B)) == 2
+	index <SigSpec> port(addB, \B) === sigY
+	optional
+endmatch
+
+code addAB sigS
+	if (addA) {
+		addAB = addA;
+		sigS = port(addA, \B);
+	}
+	if (addB) {
+		addAB = addB;
+		sigS = port(addB, \A);
+	}
+	if (addAB) {
+		int natural_mul_width = GetSize(sigA) + GetSize(sigB);
+		int actual_mul_width = GetSize(sigY);
+		int actual_acc_width = GetSize(sigS);
+
+		if ((actual_acc_width > actual_mul_width) && (natural_mul_width > actual_mul_width))
+			reject;
+		if ((actual_acc_width != actual_mul_width) && (param(mul, \A_SIGNED).as_bool() != param(addAB, \A_SIGNED).as_bool()))
+			reject;
+	}
+endcode
+
+match muxA
+	if addAB
+	select muxA->type.in($mux)
+	select nusers(port(muxA, \A)) == 2
+	index <SigSpec> port(muxA, \A) === port(addAB, \Y)
+	optional
+endmatch
+
+match muxB
+	if addAB
+	if !muxA
+	select muxB->type.in($mux)
+	select nusers(port(muxB, \B)) == 2
+	index <SigSpec> port(muxB, \B) === port(addAB, \Y)
+	optional
+endmatch
+
+code muxAB
+	muxAB = addAB;
+	if (muxA)
+		muxAB = muxA;
+	if (muxB)
+		muxAB = muxB;
+endcode
+
+match ffS
+	if muxAB
+	select ffS->type.in($dff)
+	select nusers(port(ffS, \D)) == 2
+	index <SigSpec> port(ffS, \D) === port(muxAB, \Y)
+	index <SigSpec> port(ffS, \Q) === sigS
+endmatch
+
+code clock clock_pol clock_vld
+	if (ffS) {
+		SigBit c = port(ffS, \CLK).as_bit();
+		bool cp = param(ffS, \CLK_POLARITY).as_bool();
+
+		if (clock_vld && (c != clock || cp != clock_pol))
+			reject;
+
+		clock = c;
+		clock_pol = cp;
+		clock_vld = true;
+	}
+endcode

passes/pmgen/pmgen.py

@@ -0,0 +1,486 @@
+#!/usr/bin/env python3
+
+import re
+import sys
+import pprint
+
+pp = pprint.PrettyPrinter(indent=4)
+
+pmgfile = sys.argv[1]
+assert pmgfile.endswith(".pmg")
+prefix = pmgfile[0:-4]
+prefix = prefix.split('/')[-1]
+outfile = sys.argv[2]
+
+state_types = dict()
+udata_types = dict()
+blocks = list()
+ids = dict()
+
+def rewrite_cpp(s):
+    t = list()
+    i = 0
+    while i < len(s):
+        if s[i] in ("'", '"') and i + 1 < len(s):
+            j = i + 1
+            while j + 1 < len(s) and s[j] != s[i]:
+                if s[j] == '\\' and j + 1 < len(s):
+                    j += 1
+                j += 1
+            t.append(s[i:j+1])
+            i = j + 1
+            continue
+
+        if s[i] in ('$', '\\') and i + 1 < len(s):
+            j = i + 1
+            while True:
+                if j == len(s):
+                    j -= 1
+                    break
+                if ord('a') <= ord(s[j]) <= ord('z'):
+                    j += 1
+                    continue
+                if ord('A') <= ord(s[j]) <= ord('Z'):
+                    j += 1
+                    continue
+                if ord('0') <= ord(s[j]) <= ord('9'):
+                    j += 1
+                    continue
+                if s[j] == '_':
+                    j += 1
+                    continue
+                j -= 1
+                break
+
+            n = s[i:j+1]
+            i = j + 1
+
+            if n[0] == '$':
+                v = "id_d_" + n[1:]
+            else:
+                v = "id_b_" + n[1:]
+
+            if v not in ids:
+                ids[v] = n
+            else:
+                assert ids[v] == n
+
+            t.append(v)
+            continue
+
+        if s[i] == "\t":
+            t.append("  ")
+        else:
+            t.append(s[i])
+
+        i += 1
+
+    return "".join(t)
+
+with open(pmgfile, "r") as f:
+    while True:
+        line = f.readline()
+        if line == "": break
+        line = line.strip()
+
+        cmd = line.split()
+        if len(cmd) == 0 or cmd[0].startswith("//"): continue
+        cmd = cmd[0]
+
+        if cmd == "state":
+            m = re.match(r"^state\s+<(.*?)>\s+(([A-Za-z_][A-Za-z_0-9]*\s+)*[A-Za-z_][A-Za-z_0-9]*)\s*$", line)
+            assert m
+            type_str = m.group(1)
+            states_str = m.group(2)
+            for s in re.split(r"\s+", states_str):
+                assert s not in state_types
+                state_types[s] = type_str
+            continue
+
+        if cmd == "udata":
+            m = re.match(r"^udata\s+<(.*?)>\s+(([A-Za-z_][A-Za-z_0-9]*\s+)*[A-Za-z_][A-Za-z_0-9]*)\s*$", line)
+            assert m
+            type_str = m.group(1)
+            udatas_str = m.group(2)
+            for s in re.split(r"\s+", udatas_str):
+                assert s not in udata_types
+                udata_types[s] = type_str
+            continue
+
+        if cmd == "match":
+            block = dict()
+            block["type"] = "match"
+
+            line = line.split()
+            assert len(line) == 2
+            assert line[1] not in state_types
+            block["cell"] = line[1]
+            state_types[line[1]] = "Cell*";
+
+            block["if"] = list()
+            block["select"] = list()
+            block["index"] = list()
+            block["filter"] = list()
+            block["optional"] = False
+
+            while True:
+                l = f.readline()
+                assert l != ""
+                a = l.split()
+                if len(a) == 0 or a[0].startswith("//"): continue
+                if a[0] == "endmatch": break
+
+                if a[0] == "if":
+                    b = l.lstrip()[2:]
+                    block["if"].append(rewrite_cpp(b.strip()))
+                    continue
+
+                if a[0] == "select":
+                    b = l.lstrip()[6:]
+                    block["select"].append(rewrite_cpp(b.strip()))
+                    continue
+
+                if a[0] == "index":
+                    m = re.match(r"^\s*index\s+<(.*?)>\s+(.*?)\s*===\s*(.*?)\s*$", l)
+                    assert m
+                    block["index"].append((m.group(1), rewrite_cpp(m.group(2)), rewrite_cpp(m.group(3))))
+                    continue
+
+                if a[0] == "filter":
+                    b = l.lstrip()[6:]
+                    block["filter"].append(rewrite_cpp(b.strip()))
+                    continue
+
+                if a[0] == "optional":
+                    block["optional"] = True
+                    continue
+
+                assert False
+
+            blocks.append(block)
+
+        if cmd == "code":
+            block = dict()
+            block["type"] = "code"
+            block["code"] = list()
+            block["states"] = set()
+
+            for s in line.split()[1:]:
+                assert s in state_types
+                block["states"].add(s)
+
+            while True:
+                l = f.readline()
+                assert l != ""
+                a = l.split()
+                if len(a) == 0: continue
+                if a[0] == "endcode": break
+
+                block["code"].append(rewrite_cpp(l.rstrip()))
+
+            blocks.append(block)
+
+with open(outfile, "w") as f:
+    print("// Generated by pmgen.py from {}.pgm".format(prefix), file=f)
+    print("", file=f)
+
+    print("#include \"kernel/yosys.h\"", file=f)
+    print("#include \"kernel/sigtools.h\"", file=f)
+    print("", file=f)
+
+    print("YOSYS_NAMESPACE_BEGIN", file=f)
+    print("", file=f)
+
+    print("struct {}_pm {{".format(prefix), file=f)
+    print("  Module *module;", file=f)
+    print("  SigMap sigmap;", file=f)
+    print("  std::function<void()> on_accept;".format(prefix), file=f)
+    print("", file=f)
+
+    for index in range(len(blocks)):
+        block = blocks[index]
+        if block["type"] == "match":
+            index_types = list()
+            for entry in block["index"]:
+                index_types.append(entry[0])
+            print("  typedef std::tuple<{}> index_{}_key_type;".format(", ".join(index_types), index), file=f)
+            print("  dict<index_{}_key_type, vector<Cell*>> index_{};".format(index, index), file=f)
+    print("  dict<SigBit, pool<Cell*>> sigusers;", file=f)
+    print("  pool<Cell*> blacklist_cells;", file=f)
+    print("  pool<Cell*> autoremove_cells;", file=f)
+    print("  bool blacklist_dirty;", file=f)
+    print("  int rollback;", file=f)
+    print("", file=f)
+
+    print("  struct state_t {", file=f)
+    for s, t in sorted(state_types.items()):
+        print("    {} {};".format(t, s), file=f)
+    print("  } st;", file=f)
+    print("", file=f)
+
+    print("  struct udata_t {", file=f)
+    for s, t in sorted(udata_types.items()):
+        print("    {} {};".format(t, s), file=f)
+    print("  } ud;", file=f)
+    print("", file=f)
+
+    for v, n in sorted(ids.items()):
+        if n[0] == "\\":
+            print("  IdString {}{{\"\\{}\"}};".format(v, n), file=f)
+        else:
+            print("  IdString {}{{\"{}\"}};".format(v, n), file=f)
+    print("", file=f)
+
+    print("  void add_siguser(const SigSpec &sig, Cell *cell) {", file=f)
+    print("    for (auto bit : sigmap(sig)) {", file=f)
+    print("      if (bit.wire == nullptr) continue;", file=f)
+    print("      if (sigusers.count(bit) == 0 && bit.wire->port_id)", file=f)
+    print("        sigusers[bit].insert(nullptr);", file=f)
+    print("      sigusers[bit].insert(cell);", file=f)
+    print("    }", file=f)
+    print("  }", file=f)
+    print("", file=f)
+
+    print("  void blacklist(Cell *cell) {", file=f)
+    print("    if (cell != nullptr) {", file=f)
+    print("      if (blacklist_cells.insert(cell).second)", file=f)
+    print("        blacklist_dirty = true;", file=f)
+    print("    }", file=f)
+    print("  }", file=f)
+    print("", file=f)
+
+    print("  void autoremove(Cell *cell) {", file=f)
+    print("    if (cell != nullptr) {", file=f)
+    print("      if (blacklist_cells.insert(cell).second)", file=f)
+    print("        blacklist_dirty = true;", file=f)
+    print("      autoremove_cells.insert(cell);", file=f)
+    print("    }", file=f)
+    print("  }", file=f)
+    print("", file=f)
+
+    print("  void check_blacklist() {", file=f)
+    print("    if (!blacklist_dirty)", file=f)
+    print("      return;", file=f)
+    print("    blacklist_dirty = false;", file=f)
+    for index in range(len(blocks)):
+        block = blocks[index]
+        if block["type"] == "match":
+            print("    if (st.{} != nullptr && blacklist_cells.count(st.{})) {{".format(block["cell"], block["cell"]), file=f)
+            print("      rollback = {};".format(index+1), file=f)
+            print("      return;", file=f)
+            print("    }", file=f)
+    print("    rollback = 0;", file=f)
+    print("  }", file=f)
+    print("", file=f)
+
+    print("  SigSpec port(Cell *cell, IdString portname) {", file=f)
+    print("    return sigmap(cell->getPort(portname));", file=f)
+    print("  }", file=f)
+    print("", file=f)
+
+    print("  Const param(Cell *cell, IdString paramname) {", file=f)
+    print("    return cell->getParam(paramname);", file=f)
+    print("  }", file=f)
+    print("", file=f)
+
+    print("  int nusers(const SigSpec &sig) {", file=f)
+    print("    pool<Cell*> users;", file=f)
+    print("    for (auto bit : sigmap(sig))", file=f)
+    print("      for (auto user : sigusers[bit])", file=f)
+    print("        users.insert(user);", file=f)
+    print("    return GetSize(users);", file=f)
+    print("  }", file=f)
+    print("", file=f)
+
+    print("  {}_pm(Module *module, const vector<Cell*> &cells) :".format(prefix), file=f)
+    print("      module(module), sigmap(module) {", file=f)
+    for s, t in sorted(udata_types.items()):
+        if t.endswith("*"):
+            print("    ud.{} = nullptr;".format(s), file=f)
+        else:
+            print("    ud.{} = {}();".format(s, t), file=f)
+    print("    for (auto cell : module->cells()) {", file=f)
+    print("      for (auto &conn : cell->connections())", file=f)
+    print("        add_siguser(conn.second, cell);", file=f)
+    print("    }", file=f)
+    print("    for (auto cell : cells) {", file=f)
+
+    for index in range(len(blocks)):
+        block = blocks[index]
+        if block["type"] == "match":
+            print("      do {", file=f)
+            print("        Cell *{} = cell;".format(block["cell"]), file=f)
+            for expr in block["select"]:
+                print("        if (!({})) break;".format(expr), file=f)
+            print("        index_{}_key_type key;".format(index), file=f)
+            for field, entry in enumerate(block["index"]):
+                print("        std::get<{}>(key) = {};".format(field, entry[1]), file=f)
+            print("        index_{}[key].push_back(cell);".format(index), file=f)
+            print("      } while (0);", file=f)
+
+    print("    }", file=f)
+    print("  }", file=f)
+    print("", file=f)
+
+    print("  ~{}_pm() {{".format(prefix), file=f)
+    print("    for (auto cell : autoremove_cells)", file=f)
+    print("      module->remove(cell);", file=f)
+    print("  }", file=f)
+    print("", file=f)
+
+    print("  void run(std::function<void()> on_accept_f) {", file=f)
+    print("    on_accept = on_accept_f;", file=f)
+    print("    rollback = 0;", file=f)
+    print("    blacklist_dirty = false;", file=f)
+    for s, t in sorted(state_types.items()):
+        if t.endswith("*"):
+            print("    st.{} = nullptr;".format(s), file=f)
+        else:
+            print("    st.{} = {}();".format(s, t), file=f)
+    print("    block_0();", file=f)
+    print("  }", file=f)
+    print("", file=f)
+
+    print("  void run(std::function<void({}_pm&)> on_accept_f) {{".format(prefix), file=f)
+    print("    run([&](){on_accept_f(*this);});", file=f)
+    print("  }", file=f)
+    print("", file=f)
+
+    for index in range(len(blocks)):
+        block = blocks[index]
+
+        print("  void block_{}() {{".format(index), file=f)
+
+        const_st = set()
+        nonconst_st = set()
+        restore_st = set()
+
+        for i in range(index):
+            if blocks[i]["type"] == "code":
+                for s in blocks[i]["states"]:
+                    const_st.add(s)
+            elif blocks[i]["type"] == "match":
+                const_st.add(blocks[i]["cell"])
+            else:
+                assert False
+
+        if block["type"] == "code":
+            for s in block["states"]:
+                if s in const_st:
+                    const_st.remove(s)
+                    restore_st.add(s)
+                nonconst_st.add(s)
+        elif block["type"] == "match":
+            s = block["cell"]
+            assert s not in const_st
+            nonconst_st.add(s)
+        else:
+            assert False
+
+        for s in sorted(const_st):
+            t = state_types[s]
+            if t.endswith("*"):
+                print("    {} const &{} YS_ATTRIBUTE(unused) = st.{};".format(t, s, s), file=f)
+            else:
+                print("    const {} &{} YS_ATTRIBUTE(unused) = st.{};".format(t, s, s), file=f)
+
+        for s in sorted(nonconst_st):
+            t = state_types[s]
+            print("    {} &{} YS_ATTRIBUTE(unused) = st.{};".format(t, s, s), file=f)
+
+        if len(restore_st):
+            print("", file=f)
+            for s in sorted(restore_st):
+                t = state_types[s]
+                print("    {} backup_{} = {};".format(t, s, s), file=f)
+
+        if block["type"] == "code":
+            print("", file=f)
+            print("    do {", file=f)
+            print("#define reject do { check_blacklist(); goto rollback_label; } while(0)", file=f)
+            print("#define accept do { on_accept(); check_blacklist(); if (rollback) goto rollback_label; } while(0)", file=f)
+            print("#define branch do {{ block_{}(); if (rollback) goto rollback_label; }} while(0)".format(index+1), file=f)
+
+            for line in block["code"]:
+                print("    " + line, file=f)
+
+            print("", file=f)
+            print("      block_{}();".format(index+1), file=f)
+            print("#undef reject", file=f)
+            print("#undef accept", file=f)
+            print("#undef branch", file=f)
+            print("    } while (0);", file=f)
+            print("", file=f)
+            print("rollback_label:", file=f)
+            print("    YS_ATTRIBUTE(unused);", file=f)
+
+            if len(restore_st) or len(nonconst_st):
+                print("", file=f)
+                for s in sorted(restore_st):
+                    t = state_types[s]
+                    print("    {} = backup_{};".format(s, s), file=f)
+                for s in sorted(nonconst_st):
+                    if s not in restore_st:
+                        t = state_types[s]
+                        if t.endswith("*"):
+                            print("    {} = nullptr;".format(s), file=f)
+                        else:
+                            print("    {} = {}();".format(s, t), file=f)
+
+        elif block["type"] == "match":
+            assert len(restore_st) == 0
+
+            if len(block["if"]):
+                for expr in block["if"]:
+                    print("", file=f)
+                    print("    if (!({})) {{".format(expr), file=f)
+                    print("      {} = nullptr;".format(block["cell"]), file=f)
+                    print("      block_{}();".format(index+1), file=f)
+                    print("      return;", file=f)
+                    print("    }", file=f)
+
+            print("", file=f)
+            print("    index_{}_key_type key;".format(index), file=f)
+            for field, entry in enumerate(block["index"]):
+                print("    std::get<{}>(key) = {};".format(field, entry[2]), file=f)
+            print("    const vector<Cell*> &cells = index_{}[key];".format(index), file=f)
+
+            print("", file=f)
+            print("    for (int idx = 0; idx < GetSize(cells); idx++) {", file=f)
+            print("      {} = cells[idx];".format(block["cell"]), file=f)
+            print("      if (blacklist_cells.count({})) continue;".format(block["cell"]), file=f)
+            for expr in block["filter"]:
+                print("      if (!({})) continue;".format(expr), file=f)
+            print("      block_{}();".format(index+1), file=f)
+            print("      if (rollback) {", file=f)
+            print("        if (rollback != {}) {{".format(index+1), file=f)
+            print("          {} = nullptr;".format(block["cell"]), file=f)
+            print("          return;", file=f)
+            print("        }", file=f)
+            print("        rollback = 0;", file=f)
+            print("      }", file=f)
+            print("    }", file=f)
+
+            print("", file=f)
+            print("    {} = nullptr;".format(block["cell"]), file=f)
+
+            if block["optional"]:
+                print("    block_{}();".format(index+1), file=f)
+
+        else:
+            assert False
+
+
+        print("  }", file=f)
+        print("", file=f)
+
+    print("  void block_{}() {{".format(len(blocks)), file=f)
+    print("    on_accept();", file=f)
+    print("    check_blacklist();", file=f)
+    print("  }", file=f)
+    print("};", file=f)
+
+    print("", file=f)
+    print("YOSYS_NAMESPACE_END", file=f)
+
+# pp.pprint(blocks)

passes/sat/Makefile.inc

@@ -8,4 +8,7 @@ OBJS += passes/sat/expose.o
 OBJS += passes/sat/assertpmux.o
 OBJS += passes/sat/clk2fflogic.o
 OBJS += passes/sat/async2sync.o
+OBJS += passes/sat/supercover.o
+OBJS += passes/sat/fmcombine.o
+OBJS += passes/sat/mutate.o
 

passes/sat/async2sync.cc

@@ -39,7 +39,7 @@ struct Async2syncPass : public Pass {
 		log("reset value in the next cycle regardless of the data-in value at the time of\n");
 		log("the clock edge.\n");
 		log("\n");
-		log("Currently only $adff cells are supported by this pass.\n");
+		log("Currently only $adff and $dffsr cells are supported by this pass.\n");
 		log("\n");
 	}
 	void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
@@ -84,7 +84,7 @@ struct Async2syncPass : public Pass {
 					bool arst_pol = cell->parameters["\\ARST_POLARITY"].as_bool();
 					Const arst_val = cell->parameters["\\ARST_VALUE"];
 
-					SigSpec sig_clk = cell->getPort("\\CLK");
+					// SigSpec sig_clk = cell->getPort("\\CLK");
 					SigSpec sig_arst = cell->getPort("\\ARST");
 					SigSpec sig_d = cell->getPort("\\D");
 					SigSpec sig_q = cell->getPort("\\Q");
@@ -120,6 +120,55 @@ struct Async2syncPass : public Pass {
 					cell->type = "$dff";
 					continue;
 				}
+
+				if (cell->type.in("$dffsr"))
+				{
+					// bool clk_pol = cell->parameters["\\CLK_POLARITY"].as_bool();
+					bool set_pol = cell->parameters["\\SET_POLARITY"].as_bool();
+					bool clr_pol = cell->parameters["\\CLR_POLARITY"].as_bool();
+
+					// SigSpec sig_clk = cell->getPort("\\CLK");
+					SigSpec sig_set = cell->getPort("\\SET");
+					SigSpec sig_clr = cell->getPort("\\CLR");
+					SigSpec sig_d = cell->getPort("\\D");
+					SigSpec sig_q = cell->getPort("\\Q");
+
+					log("Replacing %s.%s (%s): SET=%s, CLR=%s, D=%s, Q=%s\n",
+							log_id(module), log_id(cell), log_id(cell->type),
+							log_signal(sig_set), log_signal(sig_clr), log_signal(sig_d), log_signal(sig_q));
+
+					Const init_val;
+					for (int i = 0; i < GetSize(sig_q); i++) {
+						SigBit bit = sigmap(sig_q[i]);
+						init_val.bits.push_back(initbits.count(bit) ? initbits.at(bit) : State::Sx);
+						del_initbits.insert(bit);
+					}
+
+					Wire *new_d = module->addWire(NEW_ID, GetSize(sig_d));
+					Wire *new_q = module->addWire(NEW_ID, GetSize(sig_q));
+					new_q->attributes["\\init"] = init_val;
+
+					if (!set_pol)
+						sig_set = module->Not(NEW_ID, sig_set);
+
+					if (clr_pol)
+						sig_clr = module->Not(NEW_ID, sig_clr);
+
+					SigSpec tmp = module->Or(NEW_ID, sig_d, sig_set);
+					module->addAnd(NEW_ID, tmp, sig_clr, new_d);
+
+					tmp = module->Or(NEW_ID, new_q, sig_set);
+					module->addAnd(NEW_ID, tmp, sig_clr, sig_q);
+
+					cell->setPort("\\D", new_d);
+					cell->setPort("\\Q", new_q);
+					cell->unsetPort("\\SET");
+					cell->unsetPort("\\CLR");
+					cell->unsetParam("\\SET_POLARITY");
+					cell->unsetParam("\\CLR_POLARITY");
+					cell->type = "$dff";
+					continue;
+				}
 			}
 
 			for (auto wire : module->wires())

passes/sat/fmcombine.cc

@@ -0,0 +1,341 @@
+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "kernel/yosys.h"
+#include "kernel/sigtools.h"
+#include "kernel/celltypes.h"
+
+USING_YOSYS_NAMESPACE
+PRIVATE_NAMESPACE_BEGIN
+
+struct opts_t
+{
+	bool fwd = false;
+	bool bwd = false;
+	bool nop = false;
+};
+
+struct FmcombineWorker
+{
+	const opts_t &opts;
+	Design *design;
+	Module *original = nullptr;
+	Module *module = nullptr;
+	IdString orig_type, combined_type;
+
+	FmcombineWorker(Design *design, IdString orig_type, const opts_t &opts) :
+			opts(opts), design(design), original(design->module(orig_type)),
+			orig_type(orig_type), combined_type("$fmcombine" + orig_type.str())
+	{
+	}
+
+	SigSpec import_sig(SigSpec sig, const string &suffix)
+	{
+		SigSpec newsig;
+		for (auto chunk : sig.chunks()) {
+			if (chunk.wire != nullptr)
+				chunk.wire = module->wire(chunk.wire->name.str() + suffix);
+			newsig.append(chunk);
+		}
+		return newsig;
+	}
+
+	void import_prim_cell(Cell *cell, const string &suffix)
+	{
+		Cell *c = module->addCell(cell->name.str() + suffix, cell->type);
+		c->parameters = cell->parameters;
+		c->attributes = cell->attributes;
+
+		for (auto &conn : cell->connections())
+			c->setPort(conn.first, import_sig(conn.second, suffix));
+	}
+
+	void import_hier_cell(Cell *cell)
+	{
+		if (!cell->parameters.empty())
+			log_cmd_error("Cell %s.%s has unresolved instance parameters.\n", log_id(original), log_id(cell));
+
+		FmcombineWorker sub_worker(design, cell->type, opts);
+		sub_worker.generate();
+
+		Cell *c = module->addCell(cell->name.str() + "_combined", sub_worker.combined_type);
+		// c->parameters = cell->parameters;
+		c->attributes = cell->attributes;
+
+		for (auto &conn : cell->connections()) {
+			c->setPort(conn.first.str() + "_gold", import_sig(conn.second, "_gold"));
+			c->setPort(conn.first.str() + "_gate", import_sig(conn.second, "_gate"));
+		}
+	}
+
+	void generate()
+	{
+		if (design->module(combined_type)) {
+			// log("Combined module %s already exists.\n", log_id(combined_type));
+			return;
+		}
+
+		log("Generating combined module %s from module %s.\n", log_id(combined_type), log_id(orig_type));
+		module = design->addModule(combined_type);
+
+		for (auto wire : original->wires()) {
+			module->addWire(wire->name.str() + "_gold", wire);
+			module->addWire(wire->name.str() + "_gate", wire);
+		}
+		module->fixup_ports();
+
+		for (auto cell : original->cells()) {
+			if (design->module(cell->type) == nullptr) {
+				import_prim_cell(cell, "_gold");
+				import_prim_cell(cell, "_gate");
+			} else {
+				import_hier_cell(cell);
+			}
+		}
+
+		for (auto &conn : original->connections()) {
+			module->connect(import_sig(conn.first, "_gold"), import_sig(conn.second, "_gold"));
+			module->connect(import_sig(conn.first, "_gate"), import_sig(conn.second, "_gate"));
+		}
+
+		if (opts.nop)
+			return;
+
+		CellTypes ct;
+		ct.setup_internals_eval();
+		ct.setup_stdcells_eval();
+
+		SigMap sigmap(module);
+
+		dict<SigBit, SigBit> data_bit_to_eq_net;
+		dict<Cell*, SigSpec> cell_to_eq_nets;
+		dict<SigSpec, SigSpec> reduce_db;
+		dict<SigSpec, SigSpec> invert_db;
+
+		for (auto cell : original->cells())
+		{
+			if (!ct.cell_known(cell->type))
+				continue;
+
+			for (auto &conn : cell->connections())
+			{
+				if (!cell->output(conn.first))
+					continue;
+
+				SigSpec A = import_sig(conn.second, "_gold");
+				SigSpec B = import_sig(conn.second, "_gate");
+				SigBit EQ = module->Eq(NEW_ID, A, B);
+
+				for (auto bit : sigmap({A, B}))
+					data_bit_to_eq_net[bit] = EQ;
+
+				cell_to_eq_nets[cell].append(EQ);
+			}
+		}
+
+		for (auto cell : original->cells())
+		{
+			if (!ct.cell_known(cell->type))
+				continue;
+
+			bool skip_cell = !cell_to_eq_nets.count(cell);
+			pool<SigBit> src_eq_bits;
+
+			for (auto &conn : cell->connections())
+			{
+				if (skip_cell)
+					break;
+
+				if (cell->output(conn.first))
+					continue;
+
+				SigSpec A = import_sig(conn.second, "_gold");
+				SigSpec B = import_sig(conn.second, "_gate");
+
+				for (auto bit : sigmap({A, B})) {
+					if (data_bit_to_eq_net.count(bit))
+						src_eq_bits.insert(data_bit_to_eq_net.at(bit));
+					else
+						skip_cell = true;
+				}
+			}
+
+			if (!skip_cell) {
+				SigSpec antecedent = SigSpec(src_eq_bits);
+				antecedent.sort_and_unify();
+
+				if (GetSize(antecedent) > 1) {
+					if (reduce_db.count(antecedent) == 0)
+						reduce_db[antecedent] = module->ReduceAnd(NEW_ID, antecedent);
+					antecedent = reduce_db.at(antecedent);
+				}
+
+				SigSpec consequent = cell_to_eq_nets.at(cell);
+				consequent.sort_and_unify();
+
+				if (GetSize(consequent) > 1) {
+					if (reduce_db.count(consequent) == 0)
+						reduce_db[consequent] = module->ReduceAnd(NEW_ID, consequent);
+					consequent = reduce_db.at(consequent);
+				}
+
+				if (opts.fwd)
+					module->addAssume(NEW_ID, consequent, antecedent);
+
+				if (opts.bwd)
+				{
+					if (invert_db.count(antecedent) == 0)
+						invert_db[antecedent] = module->Not(NEW_ID, antecedent);
+
+					if (invert_db.count(consequent) == 0)
+						invert_db[consequent] = module->Not(NEW_ID, consequent);
+
+					module->addAssume(NEW_ID, invert_db.at(antecedent), invert_db.at(consequent));
+				}
+			}
+		}
+	}
+};
+
+struct FmcombinePass : public Pass {
+	FmcombinePass() : Pass("fmcombine", "combine two instances of a cell into one") { }
+	void help() YS_OVERRIDE
+	{
+		//   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
+		log("\n");
+		log("    fmcombine [options] module_name gold_cell gate_cell\n");
+		// log("    fmcombine [options] @gold_cell @gate_cell\n");
+		log("\n");
+		log("This pass takes two cells, which are instances of the same module, and replaces\n");
+		log("them with one instance of a special 'combined' module, that effectively\n");
+		log("contains two copies of the original module, plus some formal properties.\n");
+		log("\n");
+		log("This is useful for formal test benches that check what differences in behavior\n");
+		log("a slight difference in input causes in a module.\n");
+		log("\n");
+		log("    -fwd\n");
+		log("        Insert forward hint assumptions into the combined module.\n");
+		log("\n");
+		log("    -bwd\n");
+		log("        Insert backward hint assumptions into the combined module.\n");
+		log("        (Backward hints are logically equivalend to fordward hits, but\n");
+		log("        some solvers are faster with bwd hints, or even both -bwd and -fwd.)\n");
+		log("\n");
+		log("    -nop\n");
+		log("        Don't insert hint assumptions into the combined module.\n");
+		log("        (This should not provide any speedup over the original design, but\n");
+		log("        strangely sometimes it does.)\n");
+		log("\n");
+		log("If none of -fwd, -bwd, and -nop is given, then -fwd is used as default.\n");
+		log("\n");
+	}
+	void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
+	{
+		opts_t opts;
+		Module *module = nullptr;
+		Cell *gold_cell = nullptr;
+		Cell *gate_cell = nullptr;
+
+		log_header(design, "Executing FMCOMBINE pass.\n");
+
+		size_t argidx;
+		for (argidx = 1; argidx < args.size(); argidx++)
+		{
+			// if (args[argidx] == "-o" && argidx+1 < args.size()) {
+			// 	filename = args[++argidx];
+			// 	continue;
+			// }
+			if (args[argidx] == "-fwd") {
+				opts.fwd = true;
+				continue;
+			}
+			if (args[argidx] == "-bwd") {
+				opts.bwd = true;
+				continue;
+			}
+			if (args[argidx] == "-nop") {
+				opts.nop = true;
+				continue;
+			}
+			break;
+		}
+		if (argidx+2 == args.size())
+		{
+			string gold_name = args[argidx++];
+			string gate_name = args[argidx++];
+			log_cmd_error("fmcombine @gold_cell @gate_cell call style is not implemented yet.");
+		}
+		else if (argidx+3 == args.size())
+		{
+			IdString module_name = RTLIL::escape_id(args[argidx++]);
+			IdString gold_name = RTLIL::escape_id(args[argidx++]);
+			IdString gate_name = RTLIL::escape_id(args[argidx++]);
+
+			module = design->module(module_name);
+			if (module == nullptr)
+				log_cmd_error("Module %s not found.\n", log_id(module_name));
+
+			gold_cell = module->cell(gold_name);
+			if (gold_cell == nullptr)
+				log_cmd_error("Gold cell %s not found in module %s.\n", log_id(gold_name), log_id(module));
+
+			gate_cell = module->cell(gate_name);
+			if (gate_cell == nullptr)
+				log_cmd_error("Gold cell %s not found in module %s.\n", log_id(gate_name), log_id(module));
+		}
+		else
+		{
+			log_cmd_error("Invalid number of arguments.\n");
+		}
+		// extra_args(args, argidx, design);
+
+		if (opts.nop && (opts.fwd || opts.bwd))
+			log_cmd_error("Option -nop can not be combined with -fwd and/or -bwd.\n");
+
+		if (!opts.nop && !opts.fwd && !opts.bwd)
+			opts.fwd = true;
+
+		if (gold_cell->type != gate_cell->type)
+			log_cmd_error("Types of gold and gate cells do not match.\n");
+		if (!gold_cell->parameters.empty())
+			log_cmd_error("Gold cell has unresolved instance parameters.\n");
+		if (!gate_cell->parameters.empty())
+			log_cmd_error("Gold cell has unresolved instance parameters.\n");
+
+		FmcombineWorker worker(design, gold_cell->type, opts);
+		worker.generate();
+		IdString combined_cell_name = module->uniquify(stringf("\\%s_%s", log_id(gold_cell), log_id(gate_cell)));
+
+		Cell *cell = module->addCell(combined_cell_name, worker.combined_type);
+		cell->attributes = gold_cell->attributes;
+		cell->add_strpool_attribute("\\src", gate_cell->get_strpool_attribute("\\src"));
+
+		log("Combining cells %s and %s in module %s into new cell %s.\n", log_id(gold_cell), log_id(gate_cell), log_id(module), log_id(cell));
+
+		for (auto &conn : gold_cell->connections())
+			cell->setPort(conn.first.str() + "_gold", conn.second);
+		module->remove(gold_cell);
+
+		for (auto &conn : gate_cell->connections())
+			cell->setPort(conn.first.str() + "_gate", conn.second);
+		module->remove(gate_cell);
+	}
+} FmcombinePass;
+
+PRIVATE_NAMESPACE_END

passes/sat/mutate.cc

@@ -0,0 +1,905 @@
+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "kernel/yosys.h"
+#include "kernel/sigtools.h"
+
+USING_YOSYS_NAMESPACE
+PRIVATE_NAMESPACE_BEGIN
+
+struct mutate_t {
+	string mode;
+	pool<string> src;
+	IdString module, cell;
+	IdString port, wire;
+	int portbit = -1;
+	int ctrlbit = -1;
+	int wirebit = -1;
+	bool used = false;
+};
+
+struct mutate_opts_t {
+	int seed = 0;
+	std::string mode;
+	pool<string> src;
+	IdString module, cell, port, wire;
+	int portbit = -1;
+	int ctrlbit = -1;
+	int wirebit = -1;
+
+	IdString ctrl_name;
+	int ctrl_width = -1, ctrl_value = -1;
+
+	int pick_cover_prcnt = 80;
+
+	int weight_cover = 500;
+
+	int weight_pq_w = 100;
+	int weight_pq_b = 100;
+	int weight_pq_c = 100;
+	int weight_pq_s = 100;
+
+	int weight_pq_mw = 100;
+	int weight_pq_mb = 100;
+	int weight_pq_mc = 100;
+	int weight_pq_ms = 100;
+};
+
+void database_add(std::vector<mutate_t> &database, const mutate_opts_t &opts, const mutate_t &entry)
+{
+	if (!opts.mode.empty() && opts.mode != entry.mode)
+		return;
+
+	if (!opts.src.empty()) {
+		bool found_match = false;
+		for (auto &s : opts.src) {
+			if (entry.src.count(s))
+				found_match = true;
+		}
+		if (!found_match)
+			return;
+	}
+
+	if (!opts.module.empty() && opts.module != entry.module)
+		return;
+
+	if (!opts.cell.empty() && opts.cell != entry.cell)
+		return;
+
+	if (!opts.port.empty() && opts.port != entry.port)
+		return;
+
+	if (opts.portbit >= 0 && opts.portbit != entry.portbit)
+		return;
+
+	if (opts.ctrlbit >= 0 && opts.ctrlbit != entry.ctrlbit)
+		return;
+
+	if (!opts.wire.empty() && opts.wire != entry.wire)
+		return;
+
+	if (opts.wirebit >= 0 && opts.wirebit != entry.wirebit)
+		return;
+
+	database.push_back(entry);
+}
+
+struct xs128_t
+{
+	uint32_t x = 123456789;
+	uint32_t y = 0, z = 0, w = 0;
+
+	xs128_t(int seed = 0) : w(seed) {
+		next();
+		next();
+		next();
+	}
+
+	void next() {
+		uint32_t t = x ^ (x << 11);
+		x = y, y = z, z = w;
+		w ^= (w >> 19) ^ t ^ (t >> 8);
+	}
+
+	int operator()() {
+		next();
+		return w & 0x3fffffff;
+	}
+
+	int operator()(int n) {
+		if (n < 2)
+			return 0;
+		while (1) {
+			int k = (*this)(), p = k % n;
+			if ((k - p + n) <= 0x40000000)
+				return p;
+		}
+	}
+};
+
+struct coverdb_t
+{
+	dict<string, int> src_db;
+	dict<tuple<IdString, IdString>, int> wire_db;
+	dict<tuple<IdString, IdString, int>, int> wirebit_db;
+
+	void insert(const mutate_t &m) {
+		if (!m.wire.empty()) {
+			wire_db[tuple<IdString, IdString>(m.module, m.wire)] = 0;
+			wirebit_db[tuple<IdString, IdString, int>(m.module, m.wire, m.wirebit)] = 0;
+		}
+		for (auto &s : m.src) {
+			src_db[s] = 0;
+		}
+	}
+
+	void update(const mutate_t &m) {
+		if (!m.wire.empty()) {
+			wire_db.at(tuple<IdString, IdString>(m.module, m.wire))++;
+			wirebit_db.at(tuple<IdString, IdString, int>(m.module, m.wire, m.wirebit))++;
+		}
+		for (auto &s : m.src) {
+			src_db.at(s)++;
+		}
+	}
+
+	int score(const mutate_t &m) {
+		int this_score = m.src.empty() ? 0 : 1;
+		if (!m.wire.empty()) {
+			this_score += wire_db.at(tuple<IdString, IdString>(m.module, m.wire)) ? 0 : 5;
+			this_score += wirebit_db.at(tuple<IdString, IdString, int>(m.module, m.wire, m.wirebit)) ? 0 : 1;
+		}
+		for (auto &s : m.src) {
+			this_score += src_db.at(s) ? 0 : 5;
+		}
+		return this_score;
+	}
+};
+
+struct mutate_queue_t
+{
+	pool<mutate_t*, hash_ptr_ops> db;
+
+	mutate_t *pick(xs128_t &rng, coverdb_t &coverdb, const mutate_opts_t &opts) {
+		mutate_t *m = nullptr;
+		if (rng(100) < opts.pick_cover_prcnt) {
+			vector<mutate_t*> candidates, rmqueue;
+			int best_score = -1;
+			for (auto p : db) {
+				if (p->used) {
+					rmqueue.push_back(p);
+					continue;
+				}
+				int this_score = coverdb.score(*p);
+				if (this_score > best_score) {
+					best_score = this_score;
+					candidates.clear();
+				}
+				if (best_score == this_score)
+					candidates.push_back(p);
+			}
+			for (auto p : rmqueue)
+				db.erase(p);
+			if (!candidates.empty())
+				m = candidates[rng(GetSize(candidates))];
+		}
+		if (m == nullptr) {
+			while (!db.empty()) {
+				int i = rng(GetSize(db));
+				auto it = db.element(i);
+				mutate_t *p = *it;
+				db.erase(it);
+				if (p->used == false) {
+					m = p;
+					break;
+				}
+			}
+		}
+		return m;
+	}
+
+	void add(mutate_t *m) {
+		db.insert(m);
+	}
+};
+
+template <typename K, typename T>
+struct mutate_chain_queue_t
+{
+	dict<K, T> db;
+
+	mutate_t *pick(xs128_t &rng, coverdb_t &coverdb, const mutate_opts_t &opts) {
+		while (!db.empty()) {
+			int i = rng(GetSize(db));
+			auto it = db.element(i);
+			mutate_t *m = it->second.pick(rng, coverdb, opts);
+			if (m != nullptr)
+				return m;
+			db.erase(it);
+		}
+		return nullptr;
+	}
+
+	template<typename... Args>
+	void add(mutate_t *m, K key, Args... args) {
+		db[key].add(m, args...);
+	}
+};
+
+template <typename K, typename T>
+struct mutate_once_queue_t
+{
+	dict<K, T> db;
+
+	mutate_t *pick(xs128_t &rng, coverdb_t &coverdb, const mutate_opts_t &opts) {
+		while (!db.empty()) {
+			int i = rng(GetSize(db));
+			auto it = db.element(i);
+			mutate_t *m = it->second.pick(rng, coverdb, opts);
+			db.erase(it);
+			if (m != nullptr)
+				return m;
+		}
+		return nullptr;
+	}
+
+	template<typename... Args>
+	void add(mutate_t *m, K key, Args... args) {
+		db[key].add(m, args...);
+	}
+};
+
+void database_reduce(std::vector<mutate_t> &database, const mutate_opts_t &opts, int N, xs128_t &rng)
+{
+	std::vector<mutate_t> new_database;
+	coverdb_t coverdb;
+
+	int total_weight = opts.weight_cover + opts.weight_pq_w + opts.weight_pq_b + opts.weight_pq_c + opts.weight_pq_s;
+	total_weight += opts.weight_pq_mw + opts.weight_pq_mb + opts.weight_pq_mc + opts.weight_pq_ms;
+
+	if (N >= GetSize(database))
+		return;
+
+	mutate_once_queue_t<tuple<IdString, IdString>, mutate_queue_t> primary_queue_wire;
+	mutate_once_queue_t<tuple<IdString, IdString, int>, mutate_queue_t> primary_queue_bit;
+	mutate_once_queue_t<tuple<IdString, IdString>, mutate_queue_t> primary_queue_cell;
+	mutate_once_queue_t<string, mutate_queue_t> primary_queue_src;
+
+	mutate_chain_queue_t<IdString, mutate_once_queue_t<IdString, mutate_queue_t>> primary_queue_module_wire;
+	mutate_chain_queue_t<IdString, mutate_once_queue_t<pair<IdString, int>, mutate_queue_t>> primary_queue_module_bit;
+	mutate_chain_queue_t<IdString, mutate_once_queue_t<IdString, mutate_queue_t>> primary_queue_module_cell;
+	mutate_chain_queue_t<IdString, mutate_once_queue_t<string, mutate_queue_t>> primary_queue_module_src;
+
+	for (auto &m : database)
+	{
+		coverdb.insert(m);
+
+		if (!m.wire.empty()) {
+			primary_queue_wire.add(&m, tuple<IdString, IdString>(m.module, m.wire));
+			primary_queue_bit.add(&m, tuple<IdString, IdString, int>(m.module, m.wire, m.wirebit));
+			primary_queue_module_wire.add(&m, m.module, m.wire);
+			primary_queue_module_bit.add(&m, m.module, pair<IdString, int>(m.wire, m.wirebit));
+		}
+
+		primary_queue_cell.add(&m, tuple<IdString, IdString>(m.module, m.cell));
+		primary_queue_module_cell.add(&m, m.module, m.cell);
+
+		for (auto &s : m.src) {
+			primary_queue_src.add(&m, s);
+			primary_queue_module_src.add(&m, m.module, s);
+		}
+	}
+
+	vector<mutate_t*> cover_candidates;
+	int best_cover_score = -1;
+	bool skip_cover = false;
+
+	while (GetSize(new_database) < N)
+	{
+		int k = rng(total_weight);
+
+		k -= opts.weight_cover;
+		if (k < 0) {
+			while (!skip_cover) {
+				if (cover_candidates.empty()) {
+					best_cover_score = -1;
+					for (auto &m : database) {
+						if (m.used || m.src.empty())
+							continue;
+						int this_score = -1;
+						for (auto &s : m.src) {
+							if (this_score == -1 || this_score > coverdb.src_db.at(s))
+								this_score = coverdb.src_db.at(s);
+						}
+						log_assert(this_score != -1);
+						if (best_cover_score == -1 || this_score < best_cover_score) {
+							cover_candidates.clear();
+							best_cover_score = this_score;
+						}
+						if (best_cover_score == this_score)
+							cover_candidates.push_back(&m);
+					}
+					if (best_cover_score == -1) {
+						skip_cover = true;
+						break;
+					}
+				}
+
+				mutate_t *m = nullptr;
+				while (!cover_candidates.empty())
+				{
+					int idx = rng(GetSize(cover_candidates));
+					mutate_t *p = cover_candidates[idx];
+					cover_candidates[idx] = cover_candidates.back();
+					cover_candidates.pop_back();
+
+					if (p->used)
+						continue;
+
+					int this_score = -1;
+					for (auto &s : p->src) {
+						if (this_score == -1 || this_score > coverdb.src_db.at(s))
+							this_score = coverdb.src_db.at(s);
+					}
+
+					if (this_score != best_cover_score)
+						continue;
+
+					m = p;
+					break;
+				}
+
+				if (m != nullptr) {
+					m->used = true;
+					coverdb.update(*m);
+					new_database.push_back(*m);
+					break;
+				}
+			}
+			continue;
+		}
+
+#define X(__wght, __queue)                               \
+    k -= __wght;                                         \
+    if (k < 0) {                                         \
+      mutate_t *m = __queue.pick(rng, coverdb, opts);    \
+      if (m != nullptr) {                                \
+        m->used = true;                                  \
+        coverdb.update(*m);                              \
+        new_database.push_back(*m);                      \
+      };                                                 \
+      continue;                                          \
+    }
+
+		X(opts.weight_pq_w, primary_queue_wire)
+		X(opts.weight_pq_b, primary_queue_bit)
+		X(opts.weight_pq_c, primary_queue_cell)
+		X(opts.weight_pq_s, primary_queue_src)
+
+		X(opts.weight_pq_mw, primary_queue_module_wire)
+		X(opts.weight_pq_mb, primary_queue_module_bit)
+		X(opts.weight_pq_mc, primary_queue_module_cell)
+		X(opts.weight_pq_ms, primary_queue_module_src)
+#undef X
+	}
+
+	std::swap(new_database, database);
+
+	int covered_src_cnt = 0;
+	int covered_wire_cnt = 0;
+	int covered_wirebit_cnt = 0;
+
+	for (auto &it : coverdb.src_db)
+		if (it.second)
+			covered_src_cnt++;
+
+	for (auto &it : coverdb.wire_db)
+		if (it.second)
+			covered_wire_cnt++;
+
+	for (auto &it : coverdb.wirebit_db)
+		if (it.second)
+			covered_wirebit_cnt++;
+
+	log("Covered %d/%d src attributes (%.2f%%).\n", covered_src_cnt, GetSize(coverdb.src_db), 100.0 * covered_src_cnt / GetSize(coverdb.src_db));
+	log("Covered %d/%d wires (%.2f%%).\n", covered_wire_cnt, GetSize(coverdb.wire_db), 100.0 * covered_wire_cnt / GetSize(coverdb.wire_db));
+	log("Covered %d/%d wire bits (%.2f%%).\n", covered_wirebit_cnt, GetSize(coverdb.wirebit_db), 100.0 * covered_wirebit_cnt / GetSize(coverdb.wirebit_db));
+}
+
+void mutate_list(Design *design, const mutate_opts_t &opts, const string &filename, int N)
+{
+	std::vector<mutate_t> database;
+	xs128_t rng(opts.seed);
+
+	for (auto module : design->selected_modules())
+	{
+		if (!opts.module.empty() && module->name != opts.module)
+			continue;
+
+		SigMap sigmap(module);
+		dict<SigBit, int> bit_user_cnt;
+
+		for (auto wire : module->wires()) {
+			if (wire->name[0] == '\\' && wire->attributes.count("\\src"))
+				sigmap.add(wire);
+		}
+
+		for (auto cell : module->cells()) {
+			for (auto &conn : cell->connections()) {
+				if (cell->output(conn.first))
+					continue;
+				for (auto bit : sigmap(conn.second))
+					bit_user_cnt[bit]++;
+			}
+		}
+
+		for (auto wire : module->selected_wires())
+		{
+			for (SigBit bit : SigSpec(wire))
+			{
+				SigBit sigbit = sigmap(bit);
+
+				if (bit.wire == nullptr || sigbit.wire == nullptr)
+					continue;
+
+				if (!bit.wire->port_id != !sigbit.wire->port_id) {
+					if (bit.wire->port_id)
+						sigmap.add(bit);
+					continue;
+				}
+
+				if (!bit.wire->name[0] != !sigbit.wire->name[0]) {
+					if (bit.wire->name[0] == '\\')
+						sigmap.add(bit);
+					continue;
+				}
+			}
+		}
+
+		for (auto cell : module->selected_cells())
+		{
+			if (!opts.cell.empty() && cell->name != opts.cell)
+				continue;
+
+			for (auto &conn : cell->connections())
+			{
+				for (int i = 0; i < GetSize(conn.second); i++) {
+					mutate_t entry;
+					entry.module = module->name;
+					entry.cell = cell->name;
+					entry.port = conn.first;
+					entry.portbit = i;
+
+					for (auto &s : cell->get_strpool_attribute("\\src"))
+						entry.src.insert(s);
+
+					SigBit bit = sigmap(conn.second[i]);
+					if (bit.wire && bit.wire->name[0] == '\\' && (cell->output(conn.first) || bit_user_cnt[bit] == 1)) {
+						for (auto &s : bit.wire->get_strpool_attribute("\\src"))
+							entry.src.insert(s);
+						entry.wire = bit.wire->name;
+						entry.wirebit = bit.offset;
+					}
+
+					entry.mode = "inv";
+					database_add(database, opts, entry);
+
+					entry.mode = "const0";
+					database_add(database, opts, entry);
+
+					entry.mode = "const1";
+					database_add(database, opts, entry);
+
+					entry.mode = "cnot0";
+					entry.ctrlbit = rng(GetSize(conn.second));
+					if (entry.ctrlbit != entry.portbit && conn.second[entry.ctrlbit].wire)
+						database_add(database, opts, entry);
+
+					entry.mode = "cnot1";
+					entry.ctrlbit = rng(GetSize(conn.second));
+					if (entry.ctrlbit != entry.portbit && conn.second[entry.ctrlbit].wire)
+						database_add(database, opts, entry);
+				}
+			}
+		}
+	}
+
+	log("Raw database size: %d\n", GetSize(database));
+	if (N != 0) {
+		database_reduce(database, opts, N, rng);
+		log("Reduced database size: %d\n", GetSize(database));
+	}
+
+	std::ofstream fout;
+
+	if (!filename.empty()) {
+		fout.open(filename, std::ios::out | std::ios::trunc);
+		if (!fout.is_open())
+			log_error("Could not open file \"%s\" with write access.\n", filename.c_str());
+	}
+
+	int ctrl_value = opts.ctrl_value;
+
+	for (auto &entry : database) {
+		string str = "mutate";
+		if (!opts.ctrl_name.empty())
+			str += stringf(" -ctrl %s %d %d", log_id(opts.ctrl_name), opts.ctrl_width, ctrl_value++);
+		str += stringf(" -mode %s", entry.mode.c_str());
+		if (!entry.module.empty())
+			str += stringf(" -module %s", log_id(entry.module));
+		if (!entry.cell.empty())
+			str += stringf(" -cell %s", log_id(entry.cell));
+		if (!entry.port.empty())
+			str += stringf(" -port %s", log_id(entry.port));
+		if (entry.portbit >= 0)
+			str += stringf(" -portbit %d", entry.portbit);
+		if (entry.ctrlbit >= 0)
+			str += stringf(" -ctrlbit %d", entry.ctrlbit);
+		if (!entry.wire.empty())
+			str += stringf(" -wire %s", log_id(entry.wire));
+		if (entry.wirebit >= 0)
+			str += stringf(" -wirebit %d", entry.wirebit);
+		for (auto &s : entry.src)
+			str += stringf(" -src %s", s.c_str());
+		if (filename.empty())
+			log("%s\n", str.c_str());
+		else
+			fout << str << std::endl;
+	}
+}
+
+SigSpec mutate_ctrl_sig(Module *module, IdString name, int width)
+{
+	Wire *ctrl_wire = module->wire(name);
+
+	if (ctrl_wire == nullptr)
+	{
+		log("Adding ctrl port %s to module %s.\n", log_id(name), log_id(module));
+
+		ctrl_wire = module->addWire(name, width);
+		ctrl_wire->port_input = true;
+		module->fixup_ports();
+
+		for (auto mod : module->design->modules())
+		for (auto cell : mod->cells())
+		{
+			if (cell->type != module->name)
+				continue;
+
+			SigSpec ctrl = mutate_ctrl_sig(mod, name, width);
+
+			log("Connecting ctrl port to cell %s in module %s.\n", log_id(cell), log_id(mod));
+			cell->setPort(name, ctrl);
+		}
+	}
+
+	log_assert(GetSize(ctrl_wire) == width);
+	return ctrl_wire;
+}
+
+SigBit mutate_ctrl(Module *module, const mutate_opts_t &opts)
+{
+	if (opts.ctrl_name.empty())
+		return State::S1;
+
+	SigSpec sig = mutate_ctrl_sig(module, opts.ctrl_name, opts.ctrl_width);
+	return module->Eq(NEW_ID, sig, Const(opts.ctrl_value, GetSize(sig)));
+}
+
+SigSpec mutate_ctrl_mux(Module *module, const mutate_opts_t &opts, SigSpec unchanged_sig, SigSpec changed_sig)
+{
+	SigBit ctrl_bit = mutate_ctrl(module, opts);
+	if (ctrl_bit == State::S0)
+		return unchanged_sig;
+	if (ctrl_bit == State::S1)
+		return changed_sig;
+	return module->Mux(NEW_ID, unchanged_sig, changed_sig, ctrl_bit);
+}
+
+void mutate_inv(Design *design, const mutate_opts_t &opts)
+{
+	Module *module = design->module(opts.module);
+	Cell *cell = module->cell(opts.cell);
+
+	SigBit bit = cell->getPort(opts.port)[opts.portbit];
+	SigBit inbit, outbit;
+
+	if (cell->input(opts.port))
+	{
+		log("Add input inverter at %s.%s.%s[%d].\n", log_id(module), log_id(cell), log_id(opts.port), opts.portbit);
+		SigBit outbit = module->Not(NEW_ID, bit);
+		bit = mutate_ctrl_mux(module, opts, bit, outbit);
+	}
+	else
+	{
+		log("Add output inverter at %s.%s.%s[%d].\n", log_id(module), log_id(cell), log_id(opts.port), opts.portbit);
+		SigBit inbit = module->addWire(NEW_ID);
+		SigBit outbit = module->Not(NEW_ID, inbit);
+		module->connect(bit, mutate_ctrl_mux(module, opts, inbit, outbit));
+		bit = inbit;
+	}
+
+	SigSpec s = cell->getPort(opts.port);
+	s[opts.portbit] = bit;
+	cell->setPort(opts.port, s);
+}
+
+void mutate_const(Design *design, const mutate_opts_t &opts, bool one)
+{
+	Module *module = design->module(opts.module);
+	Cell *cell = module->cell(opts.cell);
+
+	SigBit bit = cell->getPort(opts.port)[opts.portbit];
+	SigBit inbit, outbit;
+
+	if (cell->input(opts.port))
+	{
+		log("Add input constant %d at %s.%s.%s[%d].\n", one ? 1 : 0, log_id(module), log_id(cell), log_id(opts.port), opts.portbit);
+		SigBit outbit = one ? State::S1 : State::S0;
+		bit = mutate_ctrl_mux(module, opts, bit, outbit);
+	}
+	else
+	{
+		log("Add output constant %d at %s.%s.%s[%d].\n", one ? 1 : 0, log_id(module), log_id(cell), log_id(opts.port), opts.portbit);
+		SigBit inbit = module->addWire(NEW_ID);
+		SigBit outbit = one ? State::S1 : State::S0;
+		module->connect(bit, mutate_ctrl_mux(module, opts, inbit, outbit));
+		bit = inbit;
+	}
+
+	SigSpec s = cell->getPort(opts.port);
+	s[opts.portbit] = bit;
+	cell->setPort(opts.port, s);
+}
+
+void mutate_cnot(Design *design, const mutate_opts_t &opts, bool one)
+{
+	Module *module = design->module(opts.module);
+	Cell *cell = module->cell(opts.cell);
+
+	SigBit bit = cell->getPort(opts.port)[opts.portbit];
+	SigBit ctrl = cell->getPort(opts.port)[opts.ctrlbit];
+	SigBit inbit, outbit;
+
+	if (cell->input(opts.port))
+	{
+		log("Add input cnot%d at %s.%s.%s[%d,%d].\n", one ? 1 : 0, log_id(module), log_id(cell), log_id(opts.port), opts.portbit, opts.ctrlbit);
+		SigBit outbit = one ? module->Xor(NEW_ID, bit, ctrl) : module->Xnor(NEW_ID, bit, ctrl);
+		bit = mutate_ctrl_mux(module, opts, bit, outbit);
+	}
+	else
+	{
+		log("Add output cnot%d at %s.%s.%s[%d,%d].\n", one ? 1 : 0, log_id(module), log_id(cell), log_id(opts.port), opts.portbit, opts.ctrlbit);
+		SigBit inbit = module->addWire(NEW_ID);
+		SigBit outbit = one ? module->Xor(NEW_ID, inbit, ctrl) : module->Xnor(NEW_ID, inbit, ctrl);
+		module->connect(bit, mutate_ctrl_mux(module, opts, inbit, outbit));
+		bit = inbit;
+	}
+
+	SigSpec s = cell->getPort(opts.port);
+	s[opts.portbit] = bit;
+	cell->setPort(opts.port, s);
+}
+
+struct MutatePass : public Pass {
+	MutatePass() : Pass("mutate", "generate or apply design mutations") { }
+	void help() YS_OVERRIDE
+	{
+		//   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
+		log("\n");
+		log("    mutate -list N [options] [selection]\n");
+		log("\n");
+		log("Create a list of N mutations using an even sampling.\n");
+		log("\n");
+		log("    -o filename\n");
+		log("        Write list to this file instead of console output\n");
+		log("\n");
+		log("    -seed N\n");
+		log("        RNG seed for selecting mutations\n");
+		log("\n");
+		log("    -ctrl name width value\n");
+		log("        Add -ctrl options to the output. Use 'value' for first mutation, then\n");
+		log("        simply count up from there.\n");
+		log("\n");
+		log("    -mode name\n");
+		log("    -module name\n");
+		log("    -cell name\n");
+		log("    -port name\n");
+		log("    -portbit int\n");
+		log("    -ctrlbit int\n");
+		log("    -wire name\n");
+		log("    -wirebit int\n");
+		log("    -src string\n");
+		log("        Filter list of mutation candidates to those matching\n");
+		log("        the given parameters.\n");
+		log("\n");
+		log("    -cfg option int\n");
+		log("        Set a configuration option. Options available:\n");
+		log("          weight_pq_w weight_pq_b weight_pq_c weight_pq_s\n");
+		log("          weight_pq_mw weight_pq_mb weight_pq_mc weight_pq_ms\n");
+		log("          weight_cover pick_cover_prcnt\n");
+		log("\n");
+		log("\n");
+		log("    mutate -mode MODE [options]\n");
+		log("\n");
+		log("Apply the given mutation.\n");
+		log("\n");
+		log("    -ctrl name width value\n");
+		log("        Add a control signal with the given name and width. The mutation is\n");
+		log("        activated if the control signal equals the given value.\n");
+		log("\n");
+		log("    -module name\n");
+		log("    -cell name\n");
+		log("    -port name\n");
+		log("    -portbit int\n");
+		log("    -ctrlbit int\n");
+		log("        Mutation parameters, as generated by 'mutate -list N'.\n");
+		log("\n");
+		log("    -wire name\n");
+		log("    -wirebit int\n");
+		log("    -src string\n");
+		log("        Ignored. (They are generated by -list for documentation purposes.)\n");
+		log("\n");
+	}
+	void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
+	{
+		mutate_opts_t opts;
+		string filename;
+		int N = -1;
+
+		log_header(design, "Executing MUTATE pass.\n");
+
+		size_t argidx;
+		for (argidx = 1; argidx < args.size(); argidx++)
+		{
+			if (args[argidx] == "-list" && argidx+1 < args.size()) {
+				N = atoi(args[++argidx].c_str());
+				continue;
+			}
+			if (args[argidx] == "-o" && argidx+1 < args.size()) {
+				filename = args[++argidx];
+				continue;
+			}
+			if (args[argidx] == "-seed" && argidx+1 < args.size()) {
+				opts.seed = atoi(args[++argidx].c_str());
+				continue;
+			}
+			if (args[argidx] == "-mode" && argidx+1 < args.size()) {
+				opts.mode = args[++argidx];
+				continue;
+			}
+			if (args[argidx] == "-ctrl" && argidx+3 < args.size()) {
+				opts.ctrl_name = RTLIL::escape_id(args[++argidx]);
+				opts.ctrl_width = atoi(args[++argidx].c_str());
+				opts.ctrl_value = atoi(args[++argidx].c_str());
+				continue;
+			}
+			if (args[argidx] == "-module" && argidx+1 < args.size()) {
+				opts.module = RTLIL::escape_id(args[++argidx]);
+				continue;
+			}
+			if (args[argidx] == "-cell" && argidx+1 < args.size()) {
+				opts.cell = RTLIL::escape_id(args[++argidx]);
+				continue;
+			}
+			if (args[argidx] == "-port" && argidx+1 < args.size()) {
+				opts.port = RTLIL::escape_id(args[++argidx]);
+				continue;
+			}
+			if (args[argidx] == "-portbit" && argidx+1 < args.size()) {
+				opts.portbit = atoi(args[++argidx].c_str());
+				continue;
+			}
+			if (args[argidx] == "-ctrlbit" && argidx+1 < args.size()) {
+				opts.ctrlbit = atoi(args[++argidx].c_str());
+				continue;
+			}
+			if (args[argidx] == "-wire" && argidx+1 < args.size()) {
+				opts.wire = RTLIL::escape_id(args[++argidx]);
+				continue;
+			}
+			if (args[argidx] == "-wirebit" && argidx+1 < args.size()) {
+				opts.wirebit = atoi(args[++argidx].c_str());
+				continue;
+			}
+			if (args[argidx] == "-src" && argidx+1 < args.size()) {
+				opts.src.insert(args[++argidx]);
+				continue;
+			}
+			if (args[argidx] == "-cfg" && argidx+2 < args.size()) {
+				if (args[argidx+1] == "pick_cover_prcnt") {
+					opts.pick_cover_prcnt = atoi(args[argidx+2].c_str());
+					argidx += 2;
+					continue;
+				}
+				if (args[argidx+1] == "weight_cover") {
+					opts.weight_cover = atoi(args[argidx+2].c_str());
+					argidx += 2;
+					continue;
+				}
+				if (args[argidx+1] == "weight_pq_w") {
+					opts.weight_pq_w = atoi(args[argidx+2].c_str());
+					argidx += 2;
+					continue;
+				}
+				if (args[argidx+1] == "weight_pq_b") {
+					opts.weight_pq_b = atoi(args[argidx+2].c_str());
+					argidx += 2;
+					continue;
+				}
+				if (args[argidx+1] == "weight_pq_c") {
+					opts.weight_pq_c = atoi(args[argidx+2].c_str());
+					argidx += 2;
+					continue;
+				}
+				if (args[argidx+1] == "weight_pq_s") {
+					opts.weight_pq_s = atoi(args[argidx+2].c_str());
+					argidx += 2;
+					continue;
+				}
+				if (args[argidx+1] == "weight_pq_mw") {
+					opts.weight_pq_mw = atoi(args[argidx+2].c_str());
+					argidx += 2;
+					continue;
+				}
+				if (args[argidx+1] == "weight_pq_mb") {
+					opts.weight_pq_mb = atoi(args[argidx+2].c_str());
+					argidx += 2;
+					continue;
+				}
+				if (args[argidx+1] == "weight_pq_mc") {
+					opts.weight_pq_mc = atoi(args[argidx+2].c_str());
+					argidx += 2;
+					continue;
+				}
+				if (args[argidx+1] == "weight_pq_ms") {
+					opts.weight_pq_ms = atoi(args[argidx+2].c_str());
+					argidx += 2;
+					continue;
+				}
+			}
+			break;
+		}
+		extra_args(args, argidx, design);
+
+		if (N >= 0) {
+			mutate_list(design, opts, filename, N);
+			return;
+		}
+
+		if (opts.mode == "inv") {
+			mutate_inv(design, opts);
+			return;
+		}
+
+		if (opts.mode == "const0" || opts.mode == "const1") {
+			mutate_const(design, opts, opts.mode == "const1");
+			return;
+		}
+
+		if (opts.mode == "cnot0" || opts.mode == "cnot1") {
+			mutate_cnot(design, opts, opts.mode == "cnot1");
+			return;
+		}
+
+		log_cmd_error("Invalid mode: %s\n", opts.mode.c_str());
+	}
+} MutatePass;
+
+PRIVATE_NAMESPACE_END

passes/sat/supercover.cc

@@ -0,0 +1,92 @@
+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "kernel/yosys.h"
+#include "kernel/sigtools.h"
+
+USING_YOSYS_NAMESPACE
+PRIVATE_NAMESPACE_BEGIN
+
+struct SupercoverPass : public Pass {
+	SupercoverPass() : Pass("supercover", "add hi/lo cover cells for each wire bit") { }
+	void help() YS_OVERRIDE
+	{
+		//   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
+		log("\n");
+		log("    supercover [options] [selection]\n");
+		log("\n");
+		log("This command adds two cover cells for each bit of each selected wire, one\n");
+		log("checking for a hi signal level and one checking for lo level.\n");
+		log("\n");
+	}
+	void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
+	{
+		// bool flag_noinit = false;
+
+		log_header(design, "Executing SUPERCOVER pass.\n");
+
+		size_t argidx;
+		for (argidx = 1; argidx < args.size(); argidx++)
+		{
+			// if (args[argidx] == "-noinit") {
+			// 	flag_noinit = true;
+			// 	continue;
+			// }
+			break;
+		}
+		extra_args(args, argidx, design);
+
+		for (auto module : design->selected_modules())
+		{
+			SigMap sigmap(module);
+			pool<SigBit> handled_bits;
+
+			int cnt_wire = 0, cnt_bits = 0;
+			log("Adding cover cells to module %s.\n", log_id(module));
+			for (auto wire : module->selected_wires())
+			{
+				bool counted_wire = false;
+				std::string src = wire->get_src_attribute();
+
+				for (auto bit : sigmap(SigSpec(wire)))
+				{
+					if (bit.wire == nullptr)
+						continue;
+
+					if (handled_bits.count(bit))
+						continue;
+
+					SigSpec inv = module->Not(NEW_ID, bit);
+					module->addCover(NEW_ID, bit, State::S1, src);
+					module->addCover(NEW_ID, inv, State::S1, src);
+
+					handled_bits.insert(bit);
+					if (!counted_wire) {
+						counted_wire = false;
+						cnt_wire++;
+					}
+					cnt_bits++;
+				}
+			}
+			log("  added cover cells to %d wires, %d bits.\n", cnt_wire, cnt_bits);
+		}
+	}
+} SupercoverPass;
+
+PRIVATE_NAMESPACE_END

passes/techmap/abc.cc

@@ -327,8 +327,26 @@ void extract_cell(RTLIL::Cell *cell, bool keepff)
 	}
 }
 
-std::string remap_name(RTLIL::IdString abc_name)
+std::string remap_name(RTLIL::IdString abc_name, RTLIL::Wire **orig_wire = nullptr)
 {
+	std::string abc_sname = abc_name.substr(1);
+	if (abc_sname.substr(0, 5) == "ys__n") {
+		int sid = std::stoi(abc_sname.substr(5));
+		bool inv = abc_sname.back() == 'v';
+		for (auto sig : signal_list) {
+			if (sig.id == sid && sig.bit.wire != nullptr) {
+				std::stringstream sstr;
+				sstr << "$abc$" << map_autoidx << "$" << sig.bit.wire->name.substr(1);
+				if (sig.bit.wire->width != 1)
+					sstr << "[" << sig.bit.offset << "]";
+				if (inv)
+					sstr << "_inv";
+				if (orig_wire != nullptr)
+					*orig_wire = sig.bit.wire;
+				return sstr.str();
+			}
+		}
+	}
 	std::stringstream sstr;
 	sstr << "$abc$" << map_autoidx << "$" << abc_name.substr(1);
 	return sstr.str();
@@ -353,12 +371,12 @@ void dump_loop_graph(FILE *f, int &nr, std::map<int, std::set<int>> &edges, std:
 	}
 
 	for (auto n : nodes)
-		fprintf(f, "  n%d [label=\"%s\\nid=%d, count=%d\"%s];\n", n, log_signal(signal_list[n].bit),
+		fprintf(f, "  ys__n%d [label=\"%s\\nid=%d, count=%d\"%s];\n", n, log_signal(signal_list[n].bit),
 				n, in_counts[n], workpool.count(n) ? ", shape=box" : "");
 
 	for (auto &e : edges)
 	for (auto n : e.second)
-		fprintf(f, "  n%d -> n%d;\n", e.first, n);
+		fprintf(f, "  ys__n%d -> ys__n%d;\n", e.first, n);
 
 	fprintf(f, "}\n");
 }
@@ -624,7 +642,7 @@ struct abc_output_filter
 void abc_module(RTLIL::Design *design, RTLIL::Module *current_module, std::string script_file, std::string exe_file,
 		std::string liberty_file, std::string constr_file, bool cleanup, vector<int> lut_costs, bool dff_mode, std::string clk_str,
 		bool keepff, std::string delay_target, std::string sop_inputs, std::string sop_products, std::string lutin_shared, bool fast_mode,
-		const std::vector<RTLIL::Cell*> &cells, bool show_tempdir, bool sop_mode)
+		const std::vector<RTLIL::Cell*> &cells, bool show_tempdir, bool sop_mode, bool abc_dress)
 {
 	module = current_module;
 	map_autoidx = autoidx++;
@@ -728,7 +746,8 @@ void abc_module(RTLIL::Design *design, RTLIL::Module *current_module, std::strin
 
 	for (size_t pos = abc_script.find("{S}"); pos != std::string::npos; pos = abc_script.find("{S}", pos))
 		abc_script = abc_script.substr(0, pos) + lutin_shared + abc_script.substr(pos+3);
-
+	if (abc_dress)
+		abc_script += "; dress";
 	abc_script += stringf("; write_blif %s/output.blif", tempdir_name.c_str());
 	abc_script = add_echos_to_abc_cmd(abc_script);
 
@@ -784,7 +803,7 @@ void abc_module(RTLIL::Design *design, RTLIL::Module *current_module, std::strin
 	for (auto &si : signal_list) {
 		if (!si.is_port || si.type != G(NONE))
 			continue;
-		fprintf(f, " n%d", si.id);
+		fprintf(f, " ys__n%d", si.id);
 		pi_map[count_input++] = log_signal(si.bit);
 	}
 	if (count_input == 0)
@@ -796,17 +815,17 @@ void abc_module(RTLIL::Design *design, RTLIL::Module *current_module, std::strin
 	for (auto &si : signal_list) {
 		if (!si.is_port || si.type == G(NONE))
 			continue;
-		fprintf(f, " n%d", si.id);
+		fprintf(f, " ys__n%d", si.id);
 		po_map[count_output++] = log_signal(si.bit);
 	}
 	fprintf(f, "\n");
 
 	for (auto &si : signal_list)
-		fprintf(f, "# n%-5d %s\n", si.id, log_signal(si.bit));
+		fprintf(f, "# ys__n%-5d %s\n", si.id, log_signal(si.bit));
 
 	for (auto &si : signal_list) {
 		if (si.bit.wire == NULL) {
-			fprintf(f, ".names n%d\n", si.id);
+			fprintf(f, ".names ys__n%d\n", si.id);
 			if (si.bit == RTLIL::State::S1)
 				fprintf(f, "1\n");
 		}
@@ -815,68 +834,68 @@ void abc_module(RTLIL::Design *design, RTLIL::Module *current_module, std::strin
 	int count_gates = 0;
 	for (auto &si : signal_list) {
 		if (si.type == G(BUF)) {
-			fprintf(f, ".names n%d n%d\n", si.in1, si.id);
+			fprintf(f, ".names ys__n%d ys__n%d\n", si.in1, si.id);
 			fprintf(f, "1 1\n");
 		} else if (si.type == G(NOT)) {
-			fprintf(f, ".names n%d n%d\n", si.in1, si.id);
+			fprintf(f, ".names ys__n%d ys__n%d\n", si.in1, si.id);
 			fprintf(f, "0 1\n");
 		} else if (si.type == G(AND)) {
-			fprintf(f, ".names n%d n%d n%d\n", si.in1, si.in2, si.id);
+			fprintf(f, ".names ys__n%d ys__n%d ys__n%d\n", si.in1, si.in2, si.id);
 			fprintf(f, "11 1\n");
 		} else if (si.type == G(NAND)) {
-			fprintf(f, ".names n%d n%d n%d\n", si.in1, si.in2, si.id);
+			fprintf(f, ".names ys__n%d ys__n%d ys__n%d\n", si.in1, si.in2, si.id);
 			fprintf(f, "0- 1\n");
 			fprintf(f, "-0 1\n");
 		} else if (si.type == G(OR)) {
-			fprintf(f, ".names n%d n%d n%d\n", si.in1, si.in2, si.id);
+			fprintf(f, ".names ys__n%d ys__n%d ys__n%d\n", si.in1, si.in2, si.id);
 			fprintf(f, "-1 1\n");
 			fprintf(f, "1- 1\n");
 		} else if (si.type == G(NOR)) {
-			fprintf(f, ".names n%d n%d n%d\n", si.in1, si.in2, si.id);
+			fprintf(f, ".names ys__n%d ys__n%d ys__n%d\n", si.in1, si.in2, si.id);
 			fprintf(f, "00 1\n");
 		} else if (si.type == G(XOR)) {
-			fprintf(f, ".names n%d n%d n%d\n", si.in1, si.in2, si.id);
+			fprintf(f, ".names ys__n%d ys__n%d ys__n%d\n", si.in1, si.in2, si.id);
 			fprintf(f, "01 1\n");
 			fprintf(f, "10 1\n");
 		} else if (si.type == G(XNOR)) {
-			fprintf(f, ".names n%d n%d n%d\n", si.in1, si.in2, si.id);
+			fprintf(f, ".names ys__n%d ys__n%d ys__n%d\n", si.in1, si.in2, si.id);
 			fprintf(f, "00 1\n");
 			fprintf(f, "11 1\n");
 		} else if (si.type == G(ANDNOT)) {
-			fprintf(f, ".names n%d n%d n%d\n", si.in1, si.in2, si.id);
+			fprintf(f, ".names ys__n%d ys__n%d ys__n%d\n", si.in1, si.in2, si.id);
 			fprintf(f, "10 1\n");
 		} else if (si.type == G(ORNOT)) {
-			fprintf(f, ".names n%d n%d n%d\n", si.in1, si.in2, si.id);
+			fprintf(f, ".names ys__n%d ys__n%d ys__n%d\n", si.in1, si.in2, si.id);
 			fprintf(f, "1- 1\n");
 			fprintf(f, "-0 1\n");
 		} else if (si.type == G(MUX)) {
-			fprintf(f, ".names n%d n%d n%d n%d\n", si.in1, si.in2, si.in3, si.id);
+			fprintf(f, ".names ys__n%d ys__n%d ys__n%d ys__n%d\n", si.in1, si.in2, si.in3, si.id);
 			fprintf(f, "1-0 1\n");
 			fprintf(f, "-11 1\n");
 		} else if (si.type == G(AOI3)) {
-			fprintf(f, ".names n%d n%d n%d n%d\n", si.in1, si.in2, si.in3, si.id);
+			fprintf(f, ".names ys__n%d ys__n%d ys__n%d ys__n%d\n", si.in1, si.in2, si.in3, si.id);
 			fprintf(f, "-00 1\n");
 			fprintf(f, "0-0 1\n");
 		} else if (si.type == G(OAI3)) {
-			fprintf(f, ".names n%d n%d n%d n%d\n", si.in1, si.in2, si.in3, si.id);
+			fprintf(f, ".names ys__n%d ys__n%d ys__n%d ys__n%d\n", si.in1, si.in2, si.in3, si.id);
 			fprintf(f, "00- 1\n");
 			fprintf(f, "--0 1\n");
 		} else if (si.type == G(AOI4)) {
-			fprintf(f, ".names n%d n%d n%d n%d n%d\n", si.in1, si.in2, si.in3, si.in4, si.id);
+			fprintf(f, ".names ys__n%d ys__n%d ys__n%d ys__n%d ys__n%d\n", si.in1, si.in2, si.in3, si.in4, si.id);
 			fprintf(f, "-0-0 1\n");
 			fprintf(f, "-00- 1\n");
 			fprintf(f, "0--0 1\n");
 			fprintf(f, "0-0- 1\n");
 		} else if (si.type == G(OAI4)) {
-			fprintf(f, ".names n%d n%d n%d n%d n%d\n", si.in1, si.in2, si.in3, si.in4, si.id);
+			fprintf(f, ".names ys__n%d ys__n%d ys__n%d ys__n%d ys__n%d\n", si.in1, si.in2, si.in3, si.in4, si.id);
 			fprintf(f, "00-- 1\n");
 			fprintf(f, "--00 1\n");
 		} else if (si.type == G(FF)) {
 			if (si.init == State::S0 || si.init == State::S1) {
-				fprintf(f, ".latch n%d n%d %d\n", si.in1, si.id, si.init == State::S1 ? 1 : 0);
+				fprintf(f, ".latch ys__n%d ys__n%d %d\n", si.in1, si.id, si.init == State::S1 ? 1 : 0);
 				recover_init = true;
 			} else
-				fprintf(f, ".latch n%d n%d 2\n", si.in1, si.id);
+				fprintf(f, ".latch ys__n%d ys__n%d 2\n", si.in1, si.id);
 		} else if (si.type != G(NONE))
 			log_abort();
 		if (si.type != G(NONE))
@@ -889,7 +908,6 @@ void abc_module(RTLIL::Design *design, RTLIL::Module *current_module, std::strin
 	log("Extracted %d gates and %d wires to a netlist network with %d inputs and %d outputs.\n",
 			count_gates, GetSize(signal_list), count_input, count_output);
 	log_push();
-
 	if (count_output > 0)
 	{
 		log_header(design, "Executing ABC.\n");
@@ -988,7 +1006,10 @@ void abc_module(RTLIL::Design *design, RTLIL::Module *current_module, std::strin
 			log_error("ABC output file does not contain a module `netlist'.\n");
 		for (auto &it : mapped_mod->wires_) {
 			RTLIL::Wire *w = it.second;
-			RTLIL::Wire *wire = module->addWire(remap_name(w->name));
+			RTLIL::Wire *orig_wire = nullptr;
+			RTLIL::Wire *wire = module->addWire(remap_name(w->name, &orig_wire));
+			if (orig_wire != nullptr && orig_wire->attributes.count("\\src"))
+				wire->attributes["\\src"] = orig_wire->attributes["\\src"];
 			if (markgroups) wire->attributes["\\abcgroup"] = map_autoidx;
 			design->select(module, wire);
 		}
@@ -1213,7 +1234,7 @@ void abc_module(RTLIL::Design *design, RTLIL::Module *current_module, std::strin
 		for (auto &si : signal_list)
 			if (si.is_port) {
 				char buffer[100];
-				snprintf(buffer, 100, "\\n%d", si.id);
+				snprintf(buffer, 100, "\\ys__n%d", si.id);
 				RTLIL::SigSig conn;
 				if (si.type != G(NONE)) {
 					conn.first = si.bit;
@@ -1407,6 +1428,11 @@ struct AbcPass : public Pass {
 		log("        this attribute is a unique integer for each ABC process started. This\n");
 		log("        is useful for debugging the partitioning of clock domains.\n");
 		log("\n");
+		log("    -dress\n");
+		log("        run the 'dress' command after all other ABC commands. This aims to\n");
+		log("        preserve naming by an equivalence check between the original and post-ABC\n");
+		log("        netlists (experimental).\n");
+		log("\n");
 		log("When neither -liberty nor -lut is used, the Yosys standard cell library is\n");
 		log("loaded into ABC before the ABC script is executed.\n");
 		log("\n");
@@ -1441,6 +1467,7 @@ struct AbcPass : public Pass {
 		std::string delay_target, sop_inputs, sop_products, lutin_shared = "-S 1";
 		bool fast_mode = false, dff_mode = false, keepff = false, cleanup = true;
 		bool show_tempdir = false, sop_mode = false;
+		bool abc_dress = false;
 		vector<int> lut_costs;
 		markgroups = false;
 
@@ -1555,6 +1582,10 @@ struct AbcPass : public Pass {
 				map_mux16 = true;
 				continue;
 			}
+			if (arg == "-dress") {
+				abc_dress = true;
+				continue;
+			}
 			if (arg == "-g" && argidx+1 < args.size()) {
 				for (auto g : split_tokens(args[++argidx], ",")) {
 					vector<string> gate_list;
@@ -1704,7 +1735,7 @@ struct AbcPass : public Pass {
 
 			if (!dff_mode || !clk_str.empty()) {
 				abc_module(design, mod, script_file, exe_file, liberty_file, constr_file, cleanup, lut_costs, dff_mode, clk_str, keepff,
-						delay_target, sop_inputs, sop_products, lutin_shared, fast_mode, mod->selected_cells(), show_tempdir, sop_mode);
+						delay_target, sop_inputs, sop_products, lutin_shared, fast_mode, mod->selected_cells(), show_tempdir, sop_mode, abc_dress);
 				continue;
 			}
 
@@ -1849,7 +1880,7 @@ struct AbcPass : public Pass {
 				en_polarity = std::get<2>(it.first);
 				en_sig = assign_map(std::get<3>(it.first));
 				abc_module(design, mod, script_file, exe_file, liberty_file, constr_file, cleanup, lut_costs, !clk_sig.empty(), "$",
-						keepff, delay_target, sop_inputs, sop_products, lutin_shared, fast_mode, it.second, show_tempdir, sop_mode);
+						keepff, delay_target, sop_inputs, sop_products, lutin_shared, fast_mode, it.second, show_tempdir, sop_mode, abc_dress);
 				assign_map.set(mod);
 			}
 		}

techlibs/ecp5/Makefile.inc

@@ -1,5 +1,5 @@
 
-OBJS += techlibs/ecp5/synth_ecp5.o
+OBJS += techlibs/ecp5/synth_ecp5.o techlibs/ecp5/ecp5_ffinit.o
 
 $(eval $(call add_share_file,share/ecp5,techlibs/ecp5/cells_map.v))
 $(eval $(call add_share_file,share/ecp5,techlibs/ecp5/cells_sim.v))

techlibs/ecp5/arith_map.v

@@ -33,7 +33,7 @@ module _80_ecp5_alu (A, B, CI, BI, X, Y, CO);
 	input CI, BI;
 	output [Y_WIDTH-1:0] CO;
 
-	wire _TECHMAP_FAIL_ = Y_WIDTH <= 2;
+	wire _TECHMAP_FAIL_ = Y_WIDTH <= 4;
 
 	wire [Y_WIDTH-1:0] A_buf, B_buf;
 	\$pos #(.A_SIGNED(A_SIGNED), .A_WIDTH(A_WIDTH), .Y_WIDTH(Y_WIDTH)) A_conv (.A(A), .Y(A_buf));

techlibs/ecp5/cells_bb.v

@@ -156,6 +156,41 @@ module OSCG(
 parameter DIV = 128;
 endmodule
 
+(* blackbox *) (* keep *)
+module USRMCLK(
+	input USRMCLKI, USRMCLKTS,
+	output USRMCLKO
+);
+endmodule
+
+(* blackbox *) (* keep *)
+module JTAGG(
+	input TCK, TMS, TDI, JTDO2, JTDO1,
+	output TDO, JTDI, JTCK, JRTI2, JRTI1,
+	output JSHIFT, JUPDATE, JRSTN, JCE2, JCE1
+);
+parameter ER1 = "ENABLED";
+parameter ER2 = "ENABLED";
+endmodule
+
+(* blackbox *)
+module DELAYF(
+	input A, LOADN, MOVE, DIRECTION,
+	output Z, CFLAG
+);
+	parameter DEL_MODE = "USER_DEFINED";
+	parameter DEL_VALUE = 0;
+endmodule
+
+(* blackbox *)
+module DELAYG(
+	input A,
+	output Z
+);
+	parameter DEL_MODE = "USER_DEFINED";
+	parameter DEL_VALUE = 0;
+endmodule
+
 (* blackbox *)
 module IDDRX1F(
 	input D, SCLK, RST,
@@ -164,6 +199,31 @@ module IDDRX1F(
 	parameter GSR = "ENABLED";
 endmodule
 
+(* blackbox *)
+module IDDRX2F(
+	input D, SCLK, ECLK, RST,
+	output Q0, Q1, Q2, Q3
+);
+	parameter GSR = "ENABLED";
+endmodule
+
+(* blackbox *)
+module IDDR71B(
+	input D, SCLK, ECLK, RST, ALIGNWD,
+	output Q0, Q1, Q2, Q3, Q4, Q5, Q6
+);
+	parameter GSR = "ENABLED";
+endmodule
+
+(* blackbox *)
+module IDDRX2DQA(
+	input D, DQSR90, ECLK, SCLK, RST,
+	input RDPNTR2, RDPNTR1, RDPNTR0, WRPNTR2, WRPNTR1, WRPNTR0,
+	output Q0, Q1, Q2, Q3, QWL
+);
+	parameter GSR = "ENABLED";
+endmodule
+
 (* blackbox *)
 module ODDRX1F(
 	input SCLK, RST, D0, D1,
@@ -172,6 +232,91 @@ module ODDRX1F(
 	parameter GSR = "ENABLED";
 endmodule
 
+(* blackbox *)
+module ODDRX2F(
+	input SCLK, ECLK, RST, D0, D1, D2, D3,
+	output Q
+);
+	parameter GSR = "ENABLED";
+endmodule
+
+(* blackbox *)
+module ODDR71B(
+	input SCLK, ECLK, RST, D0, D1, D2, D3, D4, D5, D6,
+	output Q
+);
+	parameter GSR = "ENABLED";
+endmodule
+
+(* blackbox *)
+module OSHX2A(
+	input D0, D1, RST, ECLK, SCLK,
+	output Q
+);
+	parameter GSR = "ENABLED";
+endmodule
+
+(* blackbox *)
+module ODDRX2DQA(
+	input D0, D1, D2, D3, RST, ECLK, SCLK, DQSW270,
+	output Q
+);
+	parameter GSR = "ENABLED";
+endmodule
+
+(* blackbox *)
+module ODDRX2DQSB(
+	input D0, D1, D2, D3, RST, ECLK, SCLK, DQSW,
+	output Q
+);
+	parameter GSR = "ENABLED";
+endmodule
+
+(* blackbox *)
+module TSHX2DQA(
+	input T0, T1, SCLK, ECLK, DQSW270, RST,
+	output Q
+);
+	parameter GSR = "ENABLED";
+	parameter REGSET = "SET";
+endmodule
+
+(* blackbox *)
+module TSHX2DQSA(
+	input T0, T1, SCLK, ECLK, DQSW, RST,
+	output Q
+);
+	parameter GSR = "ENABLED";
+	parameter REGSET = "SET";
+endmodule
+
+(* blackbox *)
+module DQSBUFM(
+	input DQSI, READ1, READ0, READCLKSEL2, READCLKSEL1, READCLKSEL0, DDRDEL,
+	input ECLK, SCLK,
+	input DYNDELAY7, DYNDELAY6, DYNDELAY5, DYNDELAY4,
+	input DYNDELAY3, DYNDELAY2, DYNDELAY1, DYNDELAY0, 
+	input RST, RDLOADN, RDMOVE, RDDIRECTION, WRLOADN, WRMOVE, WRDIRECTION, PAUSE,
+	output DQSR90, DQSW, DQSW270,
+	output RDPNTR2, RDPNTR1, RDPNTR0, WRPNTR2, WRPNTR1, WRPNTR0,
+	output DATAVALID, BURSTDET, RDCFLAG, WRCFLAG
+);
+	parameter DQS_LI_DEL_ADJ = "FACTORYONLY";
+	parameter DQS_LI_DEL_VAL = 0;
+	parameter DQS_LO_DEL_ADJ = "FACTORYONLY";
+	parameter DQS_LO_DEL_VAL = 0;
+	parameter GSR = "ENABLED";
+endmodule
+
+(* blackbox *)
+module DDRDLLA(
+	input CLK, RST, UDDCNTLN, FREEZE,
+	output LOCK, DDRDEL, DCNTL7, DCNTL6, DCNTL5, DCNTL4, DCNTL3, DCNTL2, DCNTL1, DCNTL0
+);
+	parameter FORCE_MAX_DELAY = "NO";
+	parameter GSR = "ENABLED";
+endmodule
+
 (* blackbox *)
 module CLKDIVF(
 	input CLKI, RST, ALIGNWD,
@@ -181,6 +326,13 @@ module CLKDIVF(
 	parameter DIV = "2.0";
 endmodule
 
+(* blackbox *)
+module ECLKSYNCB(
+	input ECLKI, STOP,
+	output ECLKO
+);
+endmodule
+
 (* blackbox *)
 module DCCA(
 	input CLKI, CE,

techlibs/ecp5/cells_map.v

@@ -47,6 +47,9 @@ module  \$__DFFSE_NP1 (input D, C, E, R, output Q); TRELLIS_FF #(.GSR("DISABLED"
 module  \$__DFFSE_PP0 (input D, C, E, R, output Q); TRELLIS_FF #(.GSR("DISABLED"), .CEMUX("CE"), .CLKMUX("CLK"), .LSRMUX("LSR"), .REGSET("RESET"), .SRMODE("LSR_OVER_CE"))  _TECHMAP_REPLACE_ (.CLK(C), .CE(E), .LSR(R), .DI(D), .Q(Q)); endmodule
 module  \$__DFFSE_PP1 (input D, C, E, R, output Q); TRELLIS_FF #(.GSR("DISABLED"), .CEMUX("CE"), .CLKMUX("CLK"), .LSRMUX("LSR"), .REGSET("SET"), .SRMODE("LSR_OVER_CE"))  _TECHMAP_REPLACE_ (.CLK(C), .CE(E), .LSR(R), .DI(D), .Q(Q)); endmodule
 
+// For Diamond compatibility, FIXME: add all Diamond flipflop mappings
+module FD1S3BX(input PD, D, CK, output Q); TRELLIS_FF #(.GSR("DISABLED"), .CEMUX("1"), .CLKMUX("CLK"), .LSRMUX("LSR"), .REGSET("SET"), .SRMODE("ASYNC"))  _TECHMAP_REPLACE_ (.CLK(CK), .LSR(PD), .DI(D), .Q(Q)); endmodule
+
 `ifndef NO_LUT
 module \$lut (A, Y);
     parameter WIDTH = 0;

techlibs/ecp5/cells_sim.v

@@ -203,13 +203,14 @@ endmodule
 
 // ---------------------------------------
 
-module TRELLIS_FF(input CLK, LSR, CE, DI, output reg Q);
+module TRELLIS_FF(input CLK, LSR, CE, DI, M, output reg Q);
 	parameter GSR = "ENABLED";
 	parameter [127:0] CEMUX = "1";
 	parameter CLKMUX = "CLK";
 	parameter LSRMUX = "LSR";
 	parameter SRMODE = "LSR_OVER_CE";
 	parameter REGSET = "RESET";
+	parameter [127:0] LSRMODE = "LSR";
 
 	reg muxce;
 	always @(*)
@@ -222,8 +223,13 @@ module TRELLIS_FF(input CLK, LSR, CE, DI, output reg Q);
 
 	wire muxlsr = (LSRMUX == "INV") ? ~LSR : LSR;
 	wire muxclk = (CLKMUX == "INV") ? ~CLK : CLK;
-
+	wire srval;
-	localparam srval = (REGSET == "SET") ? 1'b1 : 1'b0;
+	generate
+		if (LSRMODE == "PRLD")
+			assign srval = M;
+		else
+			assign srval = (REGSET == "SET") ? 1'b1 : 1'b0;
+	endgenerate
 
 	initial Q = srval;
 
@@ -339,6 +345,8 @@ module TRELLIS_SLICE(
 	parameter REG1_SD = "0";
 	parameter REG0_REGSET = "RESET";
 	parameter REG1_REGSET = "RESET";
+	parameter REG0_LSRMODE = "LSR";
+	parameter REG1_LSRMODE = "LSR";
 	parameter [127:0] CCU2_INJECT1_0 = "NO";
 	parameter [127:0] CCU2_INJECT1_1 = "NO";
 	parameter WREMUX = "WRE";
@@ -428,10 +436,11 @@ module TRELLIS_SLICE(
 		.CLKMUX(CLKMUX),
 		.LSRMUX(LSRMUX),
 		.SRMODE(SRMODE),
-		.REGSET(REG0_REGSET)
+		.REGSET(REG0_REGSET),
+		.LSRMODE(REG0_LSRMODE)
 	) ff_0 (
 		.CLK(CLK), .LSR(LSR), .CE(CE),
-		.DI(muxdi0),
+		.DI(muxdi0), .M(M0),
 		.Q(Q0)
 	);
 	TRELLIS_FF #(
@@ -440,10 +449,11 @@ module TRELLIS_SLICE(
 		.CLKMUX(CLKMUX),
 		.LSRMUX(LSRMUX),
 		.SRMODE(SRMODE),
-		.REGSET(REG1_REGSET)
+		.REGSET(REG1_REGSET),
+		.LSRMODE(REG1_LSRMODE)
 	) ff_1 (
 		.CLK(CLK), .LSR(LSR), .CE(CE),
-		.DI(muxdi1),
+		.DI(muxdi1), .M(M1),
 		.Q(Q1)
 	);
 endmodule
@@ -547,3 +557,20 @@ module DP16KD(
   parameter INITVAL_3E = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
   parameter INITVAL_3F = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000;
 endmodule
+
+// For Diamond compatibility, FIXME: add all Diamond flipflop mappings
+module FD1S3BX(input PD, D, CK, output Q);
+	TRELLIS_FF #(
+		.GSR("DISABLED"),
+		.CEMUX("1"),
+		.CLKMUX("CLK"),
+		.LSRMUX("LSR"),
+		.REGSET("SET"),
+		.SRMODE("ASYNC")
+	) tff_i (
+		.CLK(CK),
+		.LSR(PD),
+		.DI(D),
+		.Q(Q)
+	);
+endmodule

techlibs/ecp5/ecp5_ffinit.cc

@@ -0,0 +1,203 @@
+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
+ *  Copyright (C) 2018-19  David Shah <david@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "kernel/yosys.h"
+#include "kernel/sigtools.h"
+
+USING_YOSYS_NAMESPACE
+PRIVATE_NAMESPACE_BEGIN
+
+struct Ecp5FfinitPass : public Pass {
+	Ecp5FfinitPass() : Pass("ecp5_ffinit", "ECP5: handle FF init values") { }
+	void help() YS_OVERRIDE
+	{
+		//   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
+		log("\n");
+		log("    ecp5_ffinit [options] [selection]\n");
+		log("\n");
+		log("Remove init values for FF output signals when equal to reset value.\n");
+		log("If reset is not used, set the reset value to the init value, otherwise\n");
+		log("unmap out the reset (if not an async reset).\n");
+	}
+	void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
+	{
+		log_header(design, "Executing ECP5_FFINIT pass (implement FF init values).\n");
+
+		size_t argidx;
+		for (argidx = 1; argidx < args.size(); argidx++)
+		{
+			// if (args[argidx] == "-singleton") {
+			// 	singleton_mode = true;
+			// 	continue;
+			// }
+			break;
+		}
+		extra_args(args, argidx, design);
+
+		for (auto module : design->selected_modules())
+		{
+			log("Handling FF init values in %s.\n", log_id(module));
+
+			SigMap sigmap(module);
+			pool<Wire*> init_wires;
+			dict<SigBit, State> initbits;
+			dict<SigBit, SigBit> initbit_to_wire;
+			pool<SigBit> handled_initbits;
+
+			for (auto wire : module->selected_wires())
+			{
+				if (wire->attributes.count("\\init") == 0)
+					continue;
+
+				SigSpec wirebits = sigmap(wire);
+				Const initval = wire->attributes.at("\\init");
+				init_wires.insert(wire);
+
+				for (int i = 0; i < GetSize(wirebits) && i < GetSize(initval); i++)
+				{
+					SigBit bit = wirebits[i];
+					State val = initval[i];
+
+					if (val != State::S0 && val != State::S1)
+						continue;
+
+					if (initbits.count(bit)) {
+						if (initbits.at(bit) != val) {
+							log_warning("Conflicting init values for signal %s (%s = %s, %s = %s).\n",
+									log_signal(bit), log_signal(SigBit(wire, i)), log_signal(val),
+									log_signal(initbit_to_wire[bit]), log_signal(initbits.at(bit)));
+							initbits.at(bit) = State::Sx;
+						}
+						continue;
+					}
+
+					initbits[bit] = val;
+					initbit_to_wire[bit] = SigBit(wire, i);
+				}
+			}
+			for (auto cell : module->selected_cells())
+			{
+				if (cell->type != "\\TRELLIS_FF")
+					continue;
+				SigSpec sig_d = cell->getPort("\\DI");
+				SigSpec sig_q = cell->getPort("\\Q");
+				SigSpec sig_lsr = cell->getPort("\\LSR");
+
+				if (GetSize(sig_d) < 1 || GetSize(sig_q) < 1)
+					continue;
+
+				SigBit bit_d = sigmap(sig_d[0]);
+				SigBit bit_q = sigmap(sig_q[0]);
+
+				std::string regset = "RESET";
+				if (cell->hasParam("\\REGSET"))
+					regset = cell->getParam("\\REGSET").decode_string();
+				State resetState;
+				if (regset == "SET")
+					resetState = State::S1;
+				else if (regset == "RESET")
+					resetState = State::S0;
+				else
+					log_error("FF cell %s has illegal REGSET value %s.\n",
+						log_id(cell), regset.c_str());
+
+				if (!initbits.count(bit_q))
+					continue;
+
+				State val = initbits.at(bit_q);
+
+				if (val == State::Sx)
+					continue;
+
+				log("FF init value for cell %s (%s): %s = %c\n", log_id(cell), log_id(cell->type),
+						log_signal(bit_q), val != State::S0 ? '1' : '0');
+				// Initval is the same as the reset state. Matches hardware, nowt more to do
+				if (val == resetState) {
+					handled_initbits.insert(bit_q);
+					continue;
+				}
+
+				if (GetSize(sig_lsr) >= 1 && sig_lsr[0] != State::S0) {
+					std::string srmode = "LSR_OVER_CE";
+					if (cell->hasParam("\\SRMODE"))
+						srmode = cell->getParam("\\SRMODE").decode_string();
+					if (srmode == "ASYNC") {
+						log("Async reset value %c for FF cell %s inconsistent with init value %c.\n",
+							resetState != State::S0 ? '1' : '0', log_id(cell), val != State::S0 ? '1' : '0');
+					} else {
+						SigBit bit_lsr = sigmap(sig_lsr[0]);
+						Wire *new_bit_d = module->addWire(NEW_ID);
+						if (resetState == State::S0) {
+							module->addAndnotGate(NEW_ID, bit_d, bit_lsr, new_bit_d);
+						} else {
+							module->addOrGate(NEW_ID, bit_d, bit_lsr, new_bit_d);
+						}
+
+						cell->setPort("\\DI", new_bit_d);
+						cell->setPort("\\LSR", State::S0);
+
+						if(cell->hasPort("\\CE")) {
+							std::string cemux = "CE";
+							if (cell->hasParam("\\CEMUX"))
+								cemux = cell->getParam("\\CEMUX").decode_string();
+							SigSpec sig_ce = cell->getPort("\\CE");
+							if (GetSize(sig_ce) >= 1) {
+								SigBit bit_ce = sigmap(sig_ce[0]);
+								Wire *new_bit_ce = module->addWire(NEW_ID);
+								if (cemux == "INV")
+									module->addAndnotGate(NEW_ID, bit_ce, bit_lsr, new_bit_ce);
+								else
+									module->addOrGate(NEW_ID, bit_ce, bit_lsr, new_bit_ce);
+								cell->setPort("\\CE", new_bit_ce);
+							}
+						}
+						cell->setParam("\\REGSET", val != State::S0 ? Const("SET") : Const("RESET"));
+						handled_initbits.insert(bit_q);
+					}
+				} else {
+					cell->setParam("\\REGSET", val != State::S0 ? Const("SET") : Const("RESET"));
+					handled_initbits.insert(bit_q);
+				}
+			}
+
+			for (auto wire : init_wires)
+			{
+				if (wire->attributes.count("\\init") == 0)
+					continue;
+
+				SigSpec wirebits = sigmap(wire);
+				Const &initval = wire->attributes.at("\\init");
+				bool remove_attribute = true;
+
+				for (int i = 0; i < GetSize(wirebits) && i < GetSize(initval); i++) {
+					if (handled_initbits.count(wirebits[i]))
+						initval[i] = State::Sx;
+					else if (initval[i] != State::Sx)
+						remove_attribute = false;
+				}
+
+				if (remove_attribute)
+					wire->attributes.erase("\\init");
+			}
+		}
+	}
+} Ecp5FfinitPass;
+
+PRIVATE_NAMESPACE_END

techlibs/ecp5/synth_ecp5.cc

@@ -255,10 +255,7 @@ struct SynthEcp5Pass : public ScriptPass
 			run("techmap -D NO_LUT -map +/ecp5/cells_map.v");
 			run("opt_expr -mux_undef");
 			run("simplemap");
-			// TODO
-#if 0
 			run("ecp5_ffinit");
-#endif
 		}
 
 		if (check_label("map_luts"))
@@ -268,9 +265,9 @@ struct SynthEcp5Pass : public ScriptPass
 			}
 			run("techmap -map +/ecp5/latches_map.v");
 			if (nomux)
-				run("abc -lut 4");
+				run("abc -lut 4 -dress");
 			else
-				run("abc -lut 4:7");
+				run("abc -lut 4:7 -dress");
 			run("clean");
 		}
 

techlibs/ice40/Makefile.inc

@@ -1,5 +1,6 @@
 
 OBJS += techlibs/ice40/synth_ice40.o
+OBJS += techlibs/ice40/ice40_braminit.o
 OBJS += techlibs/ice40/ice40_ffssr.o
 OBJS += techlibs/ice40/ice40_ffinit.o
 OBJS += techlibs/ice40/ice40_opt.o

techlibs/ice40/brams_map.v

@@ -7,8 +7,8 @@ module \$__ICE40_RAM4K (
 	input  [10:0] WADDR,
 	input  [15:0] MASK, WDATA
 );
-	parameter integer READ_MODE = 0;
+	parameter [1:0] READ_MODE = 0;
-	parameter integer WRITE_MODE = 0;
+	parameter [1:0] WRITE_MODE = 0;
 	parameter [0:0] NEGCLK_R = 0;
 	parameter [0:0] NEGCLK_W = 0;
 

techlibs/ice40/cells_sim.v

@@ -326,6 +326,8 @@ module SB_RAM40_4K (
 	parameter INIT_E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
 	parameter INIT_F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
 
+	parameter INIT_FILE = "";
+
 `ifndef BLACKBOX
 	wire [15:0] WMASK_I;
 	wire [15:0] RMASK_I;
@@ -408,25 +410,10 @@ module SB_RAM40_4K (
 	reg [15:0] memory [0:255];
 
 	initial begin
+		if (INIT_FILE != "")
+			$readmemh(INIT_FILE, memory);
+		else
 			for (i=0; i<16; i=i+1) begin
-`ifdef YOSYS
-			memory[ 0*16 + i] <= INIT_0[16*i +: 16];
-			memory[ 1*16 + i] <= INIT_1[16*i +: 16];
-			memory[ 2*16 + i] <= INIT_2[16*i +: 16];
-			memory[ 3*16 + i] <= INIT_3[16*i +: 16];
-			memory[ 4*16 + i] <= INIT_4[16*i +: 16];
-			memory[ 5*16 + i] <= INIT_5[16*i +: 16];
-			memory[ 6*16 + i] <= INIT_6[16*i +: 16];
-			memory[ 7*16 + i] <= INIT_7[16*i +: 16];
-			memory[ 8*16 + i] <= INIT_8[16*i +: 16];
-			memory[ 9*16 + i] <= INIT_9[16*i +: 16];
-			memory[10*16 + i] <= INIT_A[16*i +: 16];
-			memory[11*16 + i] <= INIT_B[16*i +: 16];
-			memory[12*16 + i] <= INIT_C[16*i +: 16];
-			memory[13*16 + i] <= INIT_D[16*i +: 16];
-			memory[14*16 + i] <= INIT_E[16*i +: 16];
-			memory[15*16 + i] <= INIT_F[16*i +: 16];
-`else
 				memory[ 0*16 + i] = INIT_0[16*i +: 16];
 				memory[ 1*16 + i] = INIT_1[16*i +: 16];
 				memory[ 2*16 + i] = INIT_2[16*i +: 16];
@@ -443,7 +430,6 @@ module SB_RAM40_4K (
 				memory[13*16 + i] = INIT_D[16*i +: 16];
 				memory[14*16 + i] = INIT_E[16*i +: 16];
 				memory[15*16 + i] = INIT_F[16*i +: 16];
-`endif
 			end
 	end
 
@@ -504,6 +490,8 @@ module SB_RAM40_4KNR (
 	parameter INIT_E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
 	parameter INIT_F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
 
+	parameter INIT_FILE = "";
+
 	SB_RAM40_4K #(
 		.WRITE_MODE(WRITE_MODE),
 		.READ_MODE (READ_MODE ),
@@ -522,7 +510,8 @@ module SB_RAM40_4KNR (
 		.INIT_C    (INIT_C    ),
 		.INIT_D    (INIT_D    ),
 		.INIT_E    (INIT_E    ),
-		.INIT_F    (INIT_F    )
+		.INIT_F    (INIT_F    ),
+		.INIT_FILE (INIT_FILE )
 	) RAM (
 		.RDATA(RDATA),
 		.RCLK (~RCLKN),
@@ -566,6 +555,8 @@ module SB_RAM40_4KNW (
 	parameter INIT_E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
 	parameter INIT_F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
 
+	parameter INIT_FILE = "";
+
 	SB_RAM40_4K #(
 		.WRITE_MODE(WRITE_MODE),
 		.READ_MODE (READ_MODE ),
@@ -584,7 +575,8 @@ module SB_RAM40_4KNW (
 		.INIT_C    (INIT_C    ),
 		.INIT_D    (INIT_D    ),
 		.INIT_E    (INIT_E    ),
-		.INIT_F    (INIT_F    )
+		.INIT_F    (INIT_F    ),
+		.INIT_FILE (INIT_FILE )
 	) RAM (
 		.RDATA(RDATA),
 		.RCLK (RCLK ),
@@ -628,6 +620,8 @@ module SB_RAM40_4KNRNW (
 	parameter INIT_E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
 	parameter INIT_F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
 
+	parameter INIT_FILE = "";
+
 	SB_RAM40_4K #(
 		.WRITE_MODE(WRITE_MODE),
 		.READ_MODE (READ_MODE ),
@@ -646,7 +640,8 @@ module SB_RAM40_4KNRNW (
 		.INIT_C    (INIT_C    ),
 		.INIT_D    (INIT_D    ),
 		.INIT_E    (INIT_E    ),
-		.INIT_F    (INIT_F    )
+		.INIT_F    (INIT_F    ),
+		.INIT_FILE (INIT_FILE )
 	) RAM (
 		.RDATA(RDATA),
 		.RCLK (~RCLKN),
@@ -886,59 +881,6 @@ module SB_WARMBOOT (
 );
 endmodule
 
-// UltraPlus feature cells
-(* blackbox *)
-module SB_MAC16 (
-	input CLK,
-	input CE,
-	input [15:0] C,
-	input [15:0] A,
-	input [15:0] B,
-	input [15:0] D,
-	input AHOLD,
-	input BHOLD,
-	input CHOLD,
-	input DHOLD,
-	input IRSTTOP,
-	input IRSTBOT,
-	input ORSTTOP,
-	input ORSTBOT,
-	input OLOADTOP,
-	input OLOADBOT,
-	input ADDSUBTOP,
-	input ADDSUBBOT,
-	input OHOLDTOP,
-	input OHOLDBOT,
-	input CI,
-	input ACCUMCI,
-	input SIGNEXTIN,
-	output [31:0] O,
-	output CO,
-	output ACCUMCO,
-	output SIGNEXTOUT
-);
-parameter NEG_TRIGGER = 1'b0;
-parameter C_REG = 1'b0;
-parameter A_REG = 1'b0;
-parameter B_REG = 1'b0;
-parameter D_REG = 1'b0;
-parameter TOP_8x8_MULT_REG = 1'b0;
-parameter BOT_8x8_MULT_REG = 1'b0;
-parameter PIPELINE_16x16_MULT_REG1 = 1'b0;
-parameter PIPELINE_16x16_MULT_REG2 = 1'b0;
-parameter TOPOUTPUT_SELECT =  2'b00;
-parameter TOPADDSUB_LOWERINPUT = 2'b00;
-parameter TOPADDSUB_UPPERINPUT = 1'b0;
-parameter TOPADDSUB_CARRYSELECT = 2'b00;
-parameter BOTOUTPUT_SELECT =  2'b00;
-parameter BOTADDSUB_LOWERINPUT = 2'b00;
-parameter BOTADDSUB_UPPERINPUT = 1'b0;
-parameter BOTADDSUB_CARRYSELECT = 2'b00;
-parameter MODE_8x8 = 1'b0;
-parameter A_SIGNED = 1'b0;
-parameter B_SIGNED = 1'b0;
-endmodule
-
 module SB_SPRAM256KA (
 	input [13:0] ADDRESS,
 	input [15:0] DATAIN,
@@ -1273,3 +1215,171 @@ module SB_IO_OD (
 	endgenerate
 `endif
 endmodule
+
+module SB_MAC16 (
+	input CLK, CE,
+	input [15:0] C, A, B, D,
+	input AHOLD, BHOLD, CHOLD, DHOLD,
+	input IRSTTOP, IRSTBOT,
+	input ORSTTOP, ORSTBOT,
+	input OLOADTOP, OLOADBOT,
+	input ADDSUBTOP, ADDSUBBOT,
+	input OHOLDTOP, OHOLDBOT,
+	input CI, ACCUMCI, SIGNEXTIN,
+	output [31:0] O,
+	output CO, ACCUMCO, SIGNEXTOUT
+);
+	parameter [0:0] NEG_TRIGGER = 0;
+	parameter [0:0] C_REG = 0;
+	parameter [0:0] A_REG = 0;
+	parameter [0:0] B_REG = 0;
+	parameter [0:0] D_REG = 0;
+	parameter [0:0] TOP_8x8_MULT_REG = 0;
+	parameter [0:0] BOT_8x8_MULT_REG = 0;
+	parameter [0:0] PIPELINE_16x16_MULT_REG1 = 0;
+	parameter [0:0] PIPELINE_16x16_MULT_REG2 = 0;
+	parameter [1:0] TOPOUTPUT_SELECT = 0;
+	parameter [1:0] TOPADDSUB_LOWERINPUT = 0;
+	parameter [0:0] TOPADDSUB_UPPERINPUT = 0;
+	parameter [1:0] TOPADDSUB_CARRYSELECT = 0;
+	parameter [1:0] BOTOUTPUT_SELECT = 0;
+	parameter [1:0] BOTADDSUB_LOWERINPUT = 0;
+	parameter [0:0] BOTADDSUB_UPPERINPUT = 0;
+	parameter [1:0] BOTADDSUB_CARRYSELECT = 0;
+	parameter [0:0] MODE_8x8 = 0;
+	parameter [0:0] A_SIGNED = 0;
+	parameter [0:0] B_SIGNED = 0;
+
+	wire clock = CLK ^ NEG_TRIGGER;
+
+	// internal wires, compare Figure on page 133 of ICE Technology Library 3.0 and Fig 2 on page 2 of Lattice TN1295-DSP
+	// http://www.latticesemi.com/~/media/LatticeSemi/Documents/TechnicalBriefs/SBTICETechnologyLibrary201608.pdf
+	// https://www.latticesemi.com/-/media/LatticeSemi/Documents/ApplicationNotes/AD/DSPFunctionUsageGuideforICE40Devices.ashx
+	wire [15:0] iA, iB, iC, iD;
+	wire [15:0] iF, iJ, iK, iG;
+	wire [31:0] iL, iH;
+	wire [15:0] iW, iX, iP, iQ;
+	wire [15:0] iY, iZ, iR, iS;
+	wire HCI, LCI, LCO;
+
+	// Regs C and A
+	reg [15:0] rC, rA;
+	always @(posedge clock, posedge IRSTTOP) begin
+		if (IRSTTOP) begin
+			rC <= 0;
+			rA <= 0;
+		end else if (CE) begin
+			if (!CHOLD) rC <= C;
+			if (!AHOLD) rA <= A;
+		end
+	end
+	assign iC = C_REG ? rC : C;
+	assign iA = A_REG ? rA : A;
+
+	// Regs B and D
+	reg [15:0] rB, rD;
+	always @(posedge clock, posedge IRSTBOT) begin
+		if (IRSTBOT) begin
+			rB <= 0;
+			rD <= 0;
+		end else if (CE) begin
+			if (!BHOLD) rB <= B;
+			if (!DHOLD) rD <= D;
+		end
+	end
+	assign iB = B_REG ? rB : B;
+	assign iD = D_REG ? rD : D;
+
+	// Multiplier Stage
+	wire [15:0] p_Ah_Bh, p_Al_Bh, p_Ah_Bl, p_Al_Bl;
+	wire [15:0] Ah, Al, Bh, Bl;
+	assign Ah = {A_SIGNED ? {8{iA[15]}} : 8'b0, iA[15: 8]};
+	assign Al = {A_SIGNED ? {8{iA[ 7]}} : 8'b0, iA[ 7: 0]};
+	assign Bh = {B_SIGNED ? {8{iB[15]}} : 8'b0, iB[15: 8]};
+	assign Bl = {B_SIGNED ? {8{iB[ 7]}} : 8'b0, iB[ 7: 0]};
+	assign p_Ah_Bh = Ah * Bh;
+	assign p_Al_Bh = Al * Bh;
+	assign p_Ah_Bl = Ah * Bl;
+	assign p_Al_Bl = Al * Bl;
+
+	// Regs F and J
+	reg [15:0] rF, rJ;
+	always @(posedge clock, posedge IRSTTOP) begin
+		if (IRSTTOP) begin
+			rF <= 0;
+			rJ <= 0;
+		end else if (CE) begin
+			rF <= p_Ah_Bh;
+			if (!MODE_8x8) rJ <= p_Al_Bh;
+		end
+	end
+	assign iF = TOP_8x8_MULT_REG ? rF : p_Ah_Bh;
+	assign iJ = PIPELINE_16x16_MULT_REG1 ? rJ : p_Al_Bh;
+
+	// Regs K and G
+	reg [15:0] rK, rG;
+	always @(posedge clock, posedge IRSTBOT) begin
+		if (IRSTBOT) begin
+			rK <= 0;
+			rG <= 0;
+		end else if (CE) begin
+			if (!MODE_8x8) rK <= p_Ah_Bl;
+			rG <= p_Al_Bl;
+		end
+	end
+	assign iK = PIPELINE_16x16_MULT_REG1 ? rK : p_Ah_Bl;
+	assign iG = BOT_8x8_MULT_REG ? rG : p_Al_Bl;
+
+	// Adder Stage
+	assign iL = iG + (iK << 8) + (iJ << 8) + (iF << 16);
+
+	// Reg H
+	reg [31:0] rH;
+	always @(posedge clock, posedge IRSTBOT) begin
+		if (IRSTBOT) begin
+			rH <= 0;
+		end else if (CE) begin
+			if (!MODE_8x8) rH <= iL;
+		end
+	end
+	assign iH = PIPELINE_16x16_MULT_REG2 ? rH : iL;
+
+	// Hi Output Stage
+	wire [15:0] XW, Oh;
+	reg [15:0] rQ;
+	assign iW = TOPADDSUB_UPPERINPUT ? iC : iQ;
+	assign iX = (TOPADDSUB_LOWERINPUT == 0) ? iA : (TOPADDSUB_LOWERINPUT == 1) ? iF : (TOPADDSUB_LOWERINPUT == 2) ? iH[31:16] : {16{iZ[15]}};
+	assign {ACCUMCO, XW} = iX + (iW ^ {16{ADDSUBTOP}}) + HCI;
+	assign CO = ACCUMCO ^ ADDSUBTOP;
+	assign iP = OLOADTOP ? iC : XW ^ {16{ADDSUBTOP}};
+	always @(posedge clock, posedge ORSTTOP) begin
+		if (ORSTTOP) begin
+			rQ <= 0;
+		end else if (CE) begin
+			if (!OHOLDTOP) rQ <= iP;
+		end
+	end
+	assign iQ = rQ;
+	assign Oh = (TOPOUTPUT_SELECT == 0) ? iP : (TOPOUTPUT_SELECT == 1) ? iQ : (TOPOUTPUT_SELECT == 2) ? iF : iH[31:16];
+	assign HCI = (TOPADDSUB_CARRYSELECT == 0) ? 1'b0 : (TOPADDSUB_CARRYSELECT == 1) ? 1'b1 : (TOPADDSUB_CARRYSELECT == 2) ? LCO : LCO ^ ADDSUBBOT;
+	assign SIGNEXTOUT = iX[15];
+
+	// Lo Output Stage
+	wire [15:0] YZ, Ol;
+	reg [15:0] rS;
+	assign iY = BOTADDSUB_UPPERINPUT ? iD : iS;
+	assign iZ = (BOTADDSUB_LOWERINPUT == 0) ? iB : (BOTADDSUB_LOWERINPUT == 1) ? iG : (BOTADDSUB_LOWERINPUT == 2) ? iH[15:0] : {16{SIGNEXTIN}};
+	assign {LCO, YZ} = iZ + (iY ^ {16{ADDSUBBOT}}) + LCI;
+	assign iR = OLOADBOT ? iD : YZ ^ {16{ADDSUBBOT}};
+	always @(posedge clock, posedge ORSTBOT) begin
+		if (ORSTBOT) begin
+			rS <= 0;
+		end else if (CE) begin
+			if (!OHOLDBOT) rS <= iR;
+		end
+	end
+	assign iS = rS;
+	assign Ol = (BOTOUTPUT_SELECT == 0) ? iR : (BOTOUTPUT_SELECT == 1) ? iS : (BOTOUTPUT_SELECT == 2) ? iG : iH[15:0];
+	assign LCI = (BOTADDSUB_CARRYSELECT == 0) ? 1'b0 : (BOTADDSUB_CARRYSELECT == 1) ? 1'b1 : (BOTADDSUB_CARRYSELECT == 2) ? ACCUMCI : CI;
+	assign O = {Oh, Ol};
+endmodule

techlibs/ice40/ice40_braminit.cc

@@ -0,0 +1,159 @@
+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "kernel/yosys.h"
+#include "kernel/sigtools.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <bitset>
+
+USING_YOSYS_NAMESPACE
+PRIVATE_NAMESPACE_BEGIN
+
+static void run_ice40_braminit(Module *module)
+{
+	for (auto cell : module->selected_cells())
+	{
+		uint16_t mem[256];
+
+		/* Only consider cells we're interested in */
+		if (cell->type != "\\SB_RAM40_4K" &&
+		    cell->type != "\\SB_RAM40_4KNR" &&
+		    cell->type != "\\SB_RAM40_4KNW" &&
+		    cell->type != "\\SB_RAM40_4KNRNW")
+			continue;
+		if (!cell->hasParam("\\INIT_FILE"))
+			continue;
+		std::string init_file = cell->getParam("\\INIT_FILE").decode_string();
+		cell->unsetParam("\\INIT_FILE");
+		if (init_file == "")
+			continue;
+
+		/* Open file */
+		log("Processing %s : %s\n", RTLIL::id2cstr(cell->name), init_file.c_str());
+
+		std::ifstream f;
+		f.open(init_file.c_str());
+		if (f.fail()) {
+			log("Can not open file `%s`.\n", init_file.c_str());
+			continue;
+		}
+
+		/* Defaults to 0 */
+		memset(mem, 0x00, sizeof(mem));
+
+		/* Process each line */
+		bool in_comment = false;
+		int cursor = 0;
+
+		while (!f.eof())
+		{
+			std::string line, token;
+			std::getline(f, line);
+
+			for (int i = 0; i < GetSize(line); i++)
+			{
+				if (in_comment && line.substr(i, 2) == "*/") {
+					line[i] = ' ';
+					line[i+1] = ' ';
+					in_comment = false;
+					continue;
+				}
+				if (!in_comment && line.substr(i, 2) == "/*")
+					in_comment = true;
+				if (in_comment)
+					line[i] = ' ';
+			}
+
+			while (1)
+			{
+				bool set_cursor = false;
+				long value;
+
+				token = next_token(line, " \t\r\n");
+				if (token.empty() || token.substr(0, 2) == "//")
+					break;
+
+				if (token[0] == '@') {
+					token = token.substr(1);
+					set_cursor = true;
+				}
+
+				const char *nptr = token.c_str();
+				char *endptr;
+				value = strtol(nptr, &endptr, 16);
+				if (!*nptr || *endptr) {
+					log("Can not parse %s `%s` for %s.\n",
+						set_cursor ? "address" : "value",
+						nptr, token.c_str()
+					);
+					continue;
+				}
+
+				if (set_cursor)
+					cursor = value;
+				else if (cursor >= 0 && cursor < 256)
+					mem[cursor++] = value;
+				else
+					log("Attempt to initialize non existent address %d\n", cursor);
+			}
+		}
+
+		/* Set attributes */
+		const char *hex = "0123456789ABCDEF";
+		for (int i=0; i<16; i++) {
+			std::string val = "";
+			for (int j=15; j>=0; j--)
+				val += std::bitset<16>(mem[i*16+j]).to_string();
+			cell->setParam("\\INIT_" + std::string(1, hex[i]), RTLIL::Const::from_string(val));
+		}
+	}
+}
+
+struct Ice40BRAMInitPass : public Pass {
+	Ice40BRAMInitPass() : Pass("ice40_braminit", "iCE40: perform SB_RAM40_4K initialization from file") { }
+	void help() YS_OVERRIDE
+	{
+		//   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
+		log("\n");
+		log("    ice40_braminit\n");
+		log("\n");
+		log("This command processes all SB_RAM40_4K blocks with a non-empty INIT_FILE\n");
+		log("parameter and converts it into the required INIT_x attributes\n");
+		log("\n");
+	}
+	void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
+	{
+		log_header(design, "Executing ICE40_BRAMINIT pass.\n");
+
+		size_t argidx;
+		for (argidx = 1; argidx < args.size(); argidx++) {
+			// if (args[argidx] == "-???") {
+			//  continue;
+			// }
+			break;
+		}
+		extra_args(args, argidx, design);
+
+		for (auto module : design->selected_modules())
+			run_ice40_braminit(module);
+	}
+} Ice40BRAMInitPass;
+
+PRIVATE_NAMESPACE_END

techlibs/ice40/synth_ice40.cc

@@ -79,6 +79,9 @@ struct SynthIce40Pass : public ScriptPass
 		log("    -nobram\n");
 		log("        do not use SB_RAM40_4K* cells in output netlist\n");
 		log("\n");
+		log("    -dsp\n");
+		log("        use iCE40 UltraPlus DSP cells for large arithmetic\n");
+		log("\n");
 		log("    -noabc\n");
 		log("        use built-in Yosys LUT techmapping instead of abc\n");
 		log("\n");
@@ -96,7 +99,7 @@ struct SynthIce40Pass : public ScriptPass
 	}
 
 	string top_opt, blif_file, edif_file, json_file;
-	bool nocarry, nodffe, nobram, flatten, retime, relut, noabc, abc2, vpr;
+	bool nocarry, nodffe, nobram, dsp, flatten, retime, relut, noabc, abc2, vpr;
 	int min_ce_use;
 
 	void clear_flags() YS_OVERRIDE
@@ -109,6 +112,7 @@ struct SynthIce40Pass : public ScriptPass
 		nodffe = false;
 		min_ce_use = -1;
 		nobram = false;
+		dsp = false;
 		flatten = true;
 		retime = false;
 		relut = false;
@@ -181,6 +185,10 @@ struct SynthIce40Pass : public ScriptPass
 				nobram = true;
 				continue;
 			}
+			if (args[argidx] == "-dsp") {
+				dsp = true;
+				continue;
+			}
 			if (args[argidx] == "-noabc") {
 				noabc = true;
 				continue;
@@ -214,11 +222,11 @@ struct SynthIce40Pass : public ScriptPass
 		{
 			run("read_verilog -lib +/ice40/cells_sim.v");
 			run(stringf("hierarchy -check %s", help_mode ? "-top <top>" : top_opt.c_str()));
+			run("proc");
 		}
 
 		if (flatten && check_label("flatten", "(unless -noflatten)"))
 		{
-			run("proc");
 			run("flatten");
 			run("tribuf -logic");
 			run("deminout");
@@ -226,13 +234,30 @@ struct SynthIce40Pass : public ScriptPass
 
 		if (check_label("coarse"))
 		{
-			run("synth -lut 4 -run coarse");
+			run("opt_expr");
+			run("opt_clean");
+			run("check");
+			run("opt");
+			run("wreduce");
+			run("share");
+			run("techmap -map +/cmp2lut.v -D LUT_WIDTH=4");
+			run("opt_expr");
+			run("opt_clean");
+			if (help_mode || dsp)
+				run("ice40_dsp", "(if -dsp)");
+			run("alumacc");
+			run("opt");
+			run("fsm");
+			run("opt -fast");
+			run("memory -nomap");
+			run("opt_clean");
 		}
 
 		if (!nobram && check_label("bram", "(skip if -nobram)"))
 		{
 			run("memory_bram -rules +/ice40/brams.txt");
 			run("techmap -map +/ice40/brams_map.v");
+			run("ice40_braminit");
 		}
 
 		if (check_label("map"))
@@ -282,7 +307,7 @@ struct SynthIce40Pass : public ScriptPass
 				run("techmap -map +/gate2lut.v -D LUT_WIDTH=4", "(only if -noabc)");
 			}
 			if (!noabc) {
-				run("abc -lut 4", "(skip if -noabc)");
+				run("abc -dress -lut 4", "(skip if -noabc)");
 			}
 			run("clean");
 			if (relut || help_mode) {

techlibs/ice40/tests/.gitignore

@@ -1,2 +1,11 @@
-test_ffs_[01][01][01][01][01]_*
+/test_ffs_[01][01][01][01][01]_*
-test_bram_[0-9]*
+/test_bram_[0-9]*
+/test_dsp_model
+/test_dsp_model.vcd
+/test_dsp_model_ref.v
+/test_dsp_model_uut.v
+/test_dsp_map
+/test_dsp_map.vcd
+/test_dsp_map_tb.v
+/test_dsp_map_top.v
+/test_dsp_map_syn.v

techlibs/ice40/tests/test_dsp_map.sh

@@ -0,0 +1,107 @@
+#!/bin/bash
+set -ex
+
+for iter in {1..100}
+do
+	SZA=$(( 3 + $RANDOM % 13 ))
+	SZB=$(( 3 + $RANDOM % 13 ))
+	SZO=$(( 3 + $RANDOM % 29 ))
+
+	C0=clk$(( $RANDOM & 1))
+	C1=clk$(( $RANDOM & 1))
+	C2=clk$(( $RANDOM & 1))
+	C3=clk$(( $RANDOM & 1))
+
+	E0=$( test $(( $RANDOM & 1 )) -eq 0 && echo posedge || echo negedge )
+	E1=$( test $(( $RANDOM & 1 )) -eq 0 && echo posedge || echo negedge )
+	E2=$( test $(( $RANDOM & 1 )) -eq 0 && echo posedge || echo negedge )
+	E3=$( test $(( $RANDOM & 1 )) -eq 0 && echo posedge || echo negedge )
+
+	SP=$( test $(( $RANDOM & 1 )) -eq 0 && echo S || echo P )
+
+	RC=$( test $(( $RANDOM & 1 )) -eq 0 && echo "reset" || echo "!reset" )
+	RV="32'h$( echo $RANDOM | md5sum | cut -c1-8 )"
+
+	cat > test_dsp_map_top.v << EOT
+module top (
+	input clk0, clk1, reset,
+	input  [$SZA:0] A,
+	input  [$SZB:0] B,
+	output [$SZO:0] O
+);
+	reg [15:0] AA, BB;
+	reg [31:0] P, S;
+
+	always @($E0 $C0) AA <= A;
+	always @($E1 $C1) BB <= B;
+	always @($E2 $C2) P <= AA * BB;
+	always @($E3 $C3) S <= $RC ? $RV : S + P;
+	assign O = $SP;
+endmodule
+EOT
+
+	cat > test_dsp_map_tb.v << EOT
+\`timescale 1ns / 1ps
+module testbench;
+	reg clk1, clk0, reset;
+	reg [$SZA:0] A;
+	reg [$SZB:0] B;
+
+	wire [$SZO:0] O_top, O_syn;
+
+	top top_inst (.clk0(clk0), .clk1(clk1), .reset(reset), .A(A), .B(B), .O(O_top));
+	syn syn_inst (.clk0(clk0), .clk1(clk1), .reset(reset), .A(A), .B(B), .O(O_syn));
+
+	initial begin
+		// \$dumpfile("test_dsp_map.vcd");
+		// \$dumpvars(0, testbench);
+
+		#2;
+		clk0 = 0;
+		clk1 = 0;
+		reset = 1;
+		reset = $RC;
+		A = 0;
+		B = 0;
+
+		repeat (3) begin
+			#2; clk0 = ~clk0;
+			#2; clk0 = ~clk0;
+			#2; clk1 = ~clk1;
+			#2; clk1 = ~clk1;
+		end
+
+		repeat (100) begin
+			#2;
+			A = \$urandom;
+			B = \$urandom;
+			reset = \$urandom & \$urandom & \$urandom & \$urandom;
+			if (\$urandom & 1) begin
+				#2; clk0 = ~clk0;
+				#2; clk0 = ~clk0;
+			end else begin
+				#2; clk1 = ~clk1;
+				#2; clk1 = ~clk1;
+			end
+			#2;
+			if (O_top !== O_syn) begin
+				\$display("ERROR: O_top=%b O_syn=%b", O_top, O_syn);
+				\$stop;
+			end
+			// \$display("OK O_top=O_syn=%b", O_top);
+		end
+
+		\$display("Test passed.");
+		\$finish;
+	end
+endmodule
+EOT
+
+	../../../yosys -p 'read_verilog test_dsp_map_top.v; synth_ice40 -dsp; rename top syn; write_verilog test_dsp_map_syn.v'
+	iverilog -o test_dsp_map -s testbench test_dsp_map_tb.v test_dsp_map_top.v test_dsp_map_syn.v ../cells_sim.v
+	vvp -N test_dsp_map
+done
+
+: ""
+: "####  All tests passed.  ####"
+: ""

techlibs/ice40/tests/test_dsp_model.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+set -ex
+sed 's/SB_MAC16/SB_MAC16_UUT/; /SB_MAC16_UUT/,/endmodule/ p; d;' < ../cells_sim.v > test_dsp_model_uut.v
+cat /opt/lscc/iCEcube2.2017.01/verilog/sb_ice_syn.v > test_dsp_model_ref.v
+for tb in testbench \
+		testbench_comb_8x8_A testbench_comb_8x8_B testbench_comb_16x16 \
+		testbench_seq_16x16_A testbench_seq_16x16_B
+do
+	iverilog -s $tb -o test_dsp_model test_dsp_model.v test_dsp_model_uut.v test_dsp_model_ref.v
+	vvp -N ./test_dsp_model
+done

techlibs/ice40/tests/test_dsp_model.v

@@ -0,0 +1,342 @@
+`timescale 1ns / 1ps
+
+module testbench;
+	parameter [0:0] NEG_TRIGGER = 0;
+	parameter [0:0] C_REG = 0;
+	parameter [0:0] A_REG = 0;
+	parameter [0:0] B_REG = 0;
+	parameter [0:0] D_REG = 0;
+	parameter [0:0] TOP_8x8_MULT_REG = 0;
+	parameter [0:0] BOT_8x8_MULT_REG = 0;
+	parameter [0:0] PIPELINE_16x16_MULT_REG1 = 0;
+	parameter [0:0] PIPELINE_16x16_MULT_REG2 = 0;
+	parameter [1:0] TOPOUTPUT_SELECT = 0;
+	parameter [1:0] TOPADDSUB_LOWERINPUT = 0;
+	parameter [0:0] TOPADDSUB_UPPERINPUT = 1;
+	parameter [1:0] TOPADDSUB_CARRYSELECT = 0;
+	parameter [1:0] BOTOUTPUT_SELECT = 0;
+	parameter [1:0] BOTADDSUB_LOWERINPUT = 0;
+	parameter [0:0] BOTADDSUB_UPPERINPUT = 1;
+	parameter [1:0] BOTADDSUB_CARRYSELECT = 0;
+	parameter [0:0] MODE_8x8 = 0;
+	parameter [0:0] A_SIGNED = 0;
+	parameter [0:0] B_SIGNED = 0;
+
+	reg CLK, CE;
+	reg [15:0] C, A, B, D;
+	reg AHOLD, BHOLD, CHOLD, DHOLD;
+	reg IRSTTOP, IRSTBOT;
+	reg ORSTTOP, ORSTBOT;
+	reg OLOADTOP, OLOADBOT;
+	reg ADDSUBTOP, ADDSUBBOT;
+	reg OHOLDTOP, OHOLDBOT;
+	reg CI, ACCUMCI, SIGNEXTIN;
+
+	output [31:0] REF_O, UUT_O;
+	output REF_CO, REF_ACCUMCO, REF_SIGNEXTOUT;
+	output UUT_CO, UUT_ACCUMCO, UUT_SIGNEXTOUT;
+
+	integer errcount = 0;
+
+	task clkcycle;
+		begin
+			#5;
+			CLK = ~CLK;
+			#10;
+			CLK = ~CLK;
+			#2;
+			if (REF_O !== UUT_O) begin
+				$display("ERROR at %1t: REF_O=%b UUT_O=%b DIFF=%b", $time, REF_O, UUT_O, REF_O ^ UUT_O);
+				errcount = errcount + 1;
+			end
+			if (REF_CO !== UUT_CO) begin
+				$display("ERROR at %1t: REF_CO=%b UUT_CO=%b", $time, REF_CO, UUT_CO);
+				errcount = errcount + 1;
+			end
+			if (REF_ACCUMCO !== UUT_ACCUMCO) begin
+				$display("ERROR at %1t: REF_ACCUMCO=%b UUT_ACCUMCO=%b", $time, REF_ACCUMCO, UUT_ACCUMCO);
+				errcount = errcount + 1;
+			end
+			if (REF_SIGNEXTOUT !== UUT_SIGNEXTOUT) begin
+				$display("ERROR at %1t: REF_SIGNEXTOUT=%b UUT_SIGNEXTOUT=%b", $time, REF_SIGNEXTOUT, UUT_SIGNEXTOUT);
+				errcount = errcount + 1;
+			end
+			#3;
+		end
+	endtask
+
+	initial begin
+		$dumpfile("test_dsp_model.vcd");
+		$dumpvars(0, testbench);
+
+		#2;
+		CLK = NEG_TRIGGER;
+		CE = 1;
+		{C, A, B, D} = 0;
+		{AHOLD, BHOLD, CHOLD, DHOLD} = 0;
+		{OLOADTOP, OLOADBOT} = 0;
+		{ADDSUBTOP, ADDSUBBOT} = 0;
+		{OHOLDTOP, OHOLDBOT} = 0;
+		{CI, ACCUMCI, SIGNEXTIN} = 0;
+
+		{IRSTTOP, IRSTBOT} = ~0;
+		{ORSTTOP, ORSTBOT} = ~0;
+
+		#3;
+		{IRSTTOP, IRSTBOT} = 0;
+		{ORSTTOP, ORSTBOT} = 0;
+
+		repeat (300) begin
+			clkcycle;
+
+			A = $urandom;
+			B = $urandom;
+			C = $urandom;
+			D = $urandom;
+
+			{AHOLD, BHOLD, CHOLD, DHOLD} = $urandom & $urandom & $urandom;
+			{OLOADTOP, OLOADBOT} = $urandom & $urandom & $urandom;
+			{ADDSUBTOP, ADDSUBBOT} = $urandom & $urandom & $urandom;
+			{OHOLDTOP, OHOLDBOT} = $urandom & $urandom & $urandom;
+			{CI, ACCUMCI, SIGNEXTIN} = $urandom & $urandom & $urandom;
+
+			{IRSTTOP, IRSTBOT} = $urandom & $urandom & $urandom;
+			{ORSTTOP, ORSTBOT} = $urandom & $urandom & $urandom;
+		end
+
+		if (errcount == 0) begin
+			$display("All tests passed.");
+			$finish;
+		end else begin
+			$display("Caught %1d errors.", errcount);
+			$stop;
+		end
+	end
+
+	SB_MAC16 #(
+		.NEG_TRIGGER              (NEG_TRIGGER             ),
+		.C_REG                    (C_REG                   ),
+		.A_REG                    (A_REG                   ),
+		.B_REG                    (B_REG                   ),
+		.D_REG                    (D_REG                   ),
+		.TOP_8x8_MULT_REG         (TOP_8x8_MULT_REG        ),
+		.BOT_8x8_MULT_REG         (BOT_8x8_MULT_REG        ),
+		.PIPELINE_16x16_MULT_REG1 (PIPELINE_16x16_MULT_REG1),
+		.PIPELINE_16x16_MULT_REG2 (PIPELINE_16x16_MULT_REG2),
+		.TOPOUTPUT_SELECT         (TOPOUTPUT_SELECT        ),
+		.TOPADDSUB_LOWERINPUT     (TOPADDSUB_LOWERINPUT    ),
+		.TOPADDSUB_UPPERINPUT     (TOPADDSUB_UPPERINPUT    ),
+		.TOPADDSUB_CARRYSELECT    (TOPADDSUB_CARRYSELECT   ),
+		.BOTOUTPUT_SELECT         (BOTOUTPUT_SELECT        ),
+		.BOTADDSUB_LOWERINPUT     (BOTADDSUB_LOWERINPUT    ),
+		.BOTADDSUB_UPPERINPUT     (BOTADDSUB_UPPERINPUT    ),
+		.BOTADDSUB_CARRYSELECT    (BOTADDSUB_CARRYSELECT   ),
+		.MODE_8x8                 (MODE_8x8                ),
+		.A_SIGNED                 (A_SIGNED                ),
+		.B_SIGNED                 (B_SIGNED                )
+	) ref (
+		.CLK        (CLK           ),
+		.CE         (CE            ),
+		.C          (C             ),
+		.A          (A             ),
+		.B          (B             ),
+		.D          (D             ),
+		.AHOLD      (AHOLD         ),
+		.BHOLD      (BHOLD         ),
+		.CHOLD      (CHOLD         ),
+		.DHOLD      (DHOLD         ),
+		.IRSTTOP    (IRSTTOP       ),
+		.IRSTBOT    (IRSTBOT       ),
+		.ORSTTOP    (ORSTTOP       ),
+		.ORSTBOT    (ORSTBOT       ),
+		.OLOADTOP   (OLOADTOP      ),
+		.OLOADBOT   (OLOADBOT      ),
+		.ADDSUBTOP  (ADDSUBTOP     ),
+		.ADDSUBBOT  (ADDSUBBOT     ),
+		.OHOLDTOP   (OHOLDTOP      ),
+		.OHOLDBOT   (OHOLDBOT      ),
+		.CI         (CI            ),
+		.ACCUMCI    (ACCUMCI       ),
+		.SIGNEXTIN  (SIGNEXTIN     ),
+		.O          (REF_O         ),
+		.CO         (REF_CO        ),
+		.ACCUMCO    (REF_ACCUMCO   ),
+		.SIGNEXTOUT (REF_SIGNEXTOUT)
+	);
+
+	SB_MAC16_UUT #(
+		.NEG_TRIGGER              (NEG_TRIGGER             ),
+		.C_REG                    (C_REG                   ),
+		.A_REG                    (A_REG                   ),
+		.B_REG                    (B_REG                   ),
+		.D_REG                    (D_REG                   ),
+		.TOP_8x8_MULT_REG         (TOP_8x8_MULT_REG        ),
+		.BOT_8x8_MULT_REG         (BOT_8x8_MULT_REG        ),
+		.PIPELINE_16x16_MULT_REG1 (PIPELINE_16x16_MULT_REG1),
+		.PIPELINE_16x16_MULT_REG2 (PIPELINE_16x16_MULT_REG2),
+		.TOPOUTPUT_SELECT         (TOPOUTPUT_SELECT        ),
+		.TOPADDSUB_LOWERINPUT     (TOPADDSUB_LOWERINPUT    ),
+		.TOPADDSUB_UPPERINPUT     (TOPADDSUB_UPPERINPUT    ),
+		.TOPADDSUB_CARRYSELECT    (TOPADDSUB_CARRYSELECT   ),
+		.BOTOUTPUT_SELECT         (BOTOUTPUT_SELECT        ),
+		.BOTADDSUB_LOWERINPUT     (BOTADDSUB_LOWERINPUT    ),
+		.BOTADDSUB_UPPERINPUT     (BOTADDSUB_UPPERINPUT    ),
+		.BOTADDSUB_CARRYSELECT    (BOTADDSUB_CARRYSELECT   ),
+		.MODE_8x8                 (MODE_8x8                ),
+		.A_SIGNED                 (A_SIGNED                ),
+		.B_SIGNED                 (B_SIGNED                )
+	) uut (
+		.CLK        (CLK           ),
+		.CE         (CE            ),
+		.C          (C             ),
+		.A          (A             ),
+		.B          (B             ),
+		.D          (D             ),
+		.AHOLD      (AHOLD         ),
+		.BHOLD      (BHOLD         ),
+		.CHOLD      (CHOLD         ),
+		.DHOLD      (DHOLD         ),
+		.IRSTTOP    (IRSTTOP       ),
+		.IRSTBOT    (IRSTBOT       ),
+		.ORSTTOP    (ORSTTOP       ),
+		.ORSTBOT    (ORSTBOT       ),
+		.OLOADTOP   (OLOADTOP      ),
+		.OLOADBOT   (OLOADBOT      ),
+		.ADDSUBTOP  (ADDSUBTOP     ),
+		.ADDSUBBOT  (ADDSUBBOT     ),
+		.OHOLDTOP   (OHOLDTOP      ),
+		.OHOLDBOT   (OHOLDBOT      ),
+		.CI         (CI            ),
+		.ACCUMCI    (ACCUMCI       ),
+		.SIGNEXTIN  (SIGNEXTIN     ),
+		.O          (UUT_O         ),
+		.CO         (UUT_CO        ),
+		.ACCUMCO    (UUT_ACCUMCO   ),
+		.SIGNEXTOUT (UUT_SIGNEXTOUT)
+	);
+endmodule
+
+module testbench_comb_8x8_A;
+	testbench #(
+		.NEG_TRIGGER               (0),
+		.C_REG                     (0),
+		.A_REG                     (0),
+		.B_REG                     (0),
+		.D_REG                     (0),
+		.TOP_8x8_MULT_REG          (0),
+		.BOT_8x8_MULT_REG          (0),
+		.PIPELINE_16x16_MULT_REG1  (0),
+		.PIPELINE_16x16_MULT_REG2  (0),
+		.TOPOUTPUT_SELECT          (2),   // 0=P, 1=Q, 2=8x8, 3=16x16
+		.TOPADDSUB_LOWERINPUT      (0),   // 0=A, 1=8x8, 2=16x16, 3=S-EXT
+		.TOPADDSUB_UPPERINPUT      (0),   // 0=Q, 1=C
+		.TOPADDSUB_CARRYSELECT     (0),   // 0=0, 1=1, 2=ACI, 3=CI
+		.BOTOUTPUT_SELECT          (2),   // 0=R, 1=S, 2=8x8, 3=16x16
+		.BOTADDSUB_LOWERINPUT      (0),   // 0=B, 1=8x8, 2=16x16, 3=S-EXT
+		.BOTADDSUB_UPPERINPUT      (0),   // 0=S, 1=D
+		.BOTADDSUB_CARRYSELECT     (0),   // 0=0, 1=1, 2=ACI, 3=CI
+		.MODE_8x8                  (0),
+		.A_SIGNED                  (0),
+		.B_SIGNED                  (0)
+	) testbench ();
+endmodule
+
+module testbench_comb_8x8_B;
+	testbench #(
+		.NEG_TRIGGER               (0),
+		.C_REG                     (0),
+		.A_REG                     (0),
+		.B_REG                     (0),
+		.D_REG                     (0),
+		.TOP_8x8_MULT_REG          (0),
+		.BOT_8x8_MULT_REG          (0),
+		.PIPELINE_16x16_MULT_REG1  (0),
+		.PIPELINE_16x16_MULT_REG2  (0),
+		.TOPOUTPUT_SELECT          (0),   // 0=P, 1=Q, 2=8x8, 3=16x16
+		.TOPADDSUB_LOWERINPUT      (1),   // 0=A, 1=8x8, 2=16x16, 3=S-EXT
+		.TOPADDSUB_UPPERINPUT      (1),   // 0=Q, 1=C
+		.TOPADDSUB_CARRYSELECT     (0),   // 0=0, 1=1, 2=ACI, 3=CI
+		.BOTOUTPUT_SELECT          (0),   // 0=R, 1=S, 2=8x8, 3=16x16
+		.BOTADDSUB_LOWERINPUT      (1),   // 0=B, 1=8x8, 2=16x16, 3=S-EXT
+		.BOTADDSUB_UPPERINPUT      (1),   // 0=S, 1=D
+		.BOTADDSUB_CARRYSELECT     (0),   // 0=0, 1=1, 2=ACI, 3=CI
+		.MODE_8x8                  (0),
+		.A_SIGNED                  (0),
+		.B_SIGNED                  (0)
+	) testbench ();
+endmodule
+
+module testbench_comb_16x16;
+	testbench #(
+		.NEG_TRIGGER               (0),
+		.C_REG                     (0),
+		.A_REG                     (0),
+		.B_REG                     (0),
+		.D_REG                     (0),
+		.TOP_8x8_MULT_REG          (0),
+		.BOT_8x8_MULT_REG          (0),
+		.PIPELINE_16x16_MULT_REG1  (0),
+		.PIPELINE_16x16_MULT_REG2  (0),
+		.TOPOUTPUT_SELECT          (0),   // 0=P, 1=Q, 2=8x8, 3=16x16
+		.TOPADDSUB_LOWERINPUT      (2),   // 0=A, 1=8x8, 2=16x16, 3=S-EXT
+		.TOPADDSUB_UPPERINPUT      (1),   // 0=Q, 1=C
+		.TOPADDSUB_CARRYSELECT     (2),   // 0=0, 1=1, 2=ACI, 3=CI
+		.BOTOUTPUT_SELECT          (0),   // 0=R, 1=S, 2=8x8, 3=16x16
+		.BOTADDSUB_LOWERINPUT      (2),   // 0=B, 1=8x8, 2=16x16, 3=S-EXT
+		.BOTADDSUB_UPPERINPUT      (1),   // 0=S, 1=D
+		.BOTADDSUB_CARRYSELECT     (2),   // 0=0, 1=1, 2=ACI, 3=CI
+		.MODE_8x8                  (0),
+		.A_SIGNED                  (0),
+		.B_SIGNED                  (0)
+	) testbench ();
+endmodule
+
+module testbench_seq_16x16_A;
+	testbench #(
+		.NEG_TRIGGER               (0),
+		.C_REG                     (1),
+		.A_REG                     (1),
+		.B_REG                     (1),
+		.D_REG                     (1),
+		.TOP_8x8_MULT_REG          (1),
+		.BOT_8x8_MULT_REG          (1),
+		.PIPELINE_16x16_MULT_REG1  (1),
+		.PIPELINE_16x16_MULT_REG2  (1),
+		.TOPOUTPUT_SELECT          (0),   // 0=P, 1=Q, 2=8x8, 3=16x16
+		.TOPADDSUB_LOWERINPUT      (2),   // 0=A, 1=8x8, 2=16x16, 3=S-EXT
+		.TOPADDSUB_UPPERINPUT      (1),   // 0=Q, 1=C
+		.TOPADDSUB_CARRYSELECT     (2),   // 0=0, 1=1, 2=ACI, 3=CI
+		.BOTOUTPUT_SELECT          (0),   // 0=R, 1=S, 2=8x8, 3=16x16
+		.BOTADDSUB_LOWERINPUT      (2),   // 0=B, 1=8x8, 2=16x16, 3=S-EXT
+		.BOTADDSUB_UPPERINPUT      (1),   // 0=S, 1=D
+		.BOTADDSUB_CARRYSELECT     (2),   // 0=0, 1=1, 2=ACI, 3=CI
+		.MODE_8x8                  (0),
+		.A_SIGNED                  (0),
+		.B_SIGNED                  (0)
+	) testbench ();
+endmodule
+
+module testbench_seq_16x16_B;
+	testbench #(
+		.NEG_TRIGGER               (0),
+		.C_REG                     (1),
+		.A_REG                     (1),
+		.B_REG                     (1),
+		.D_REG                     (1),
+		.TOP_8x8_MULT_REG          (1),
+		.BOT_8x8_MULT_REG          (1),
+		.PIPELINE_16x16_MULT_REG1  (1),
+		.PIPELINE_16x16_MULT_REG2  (0),
+		.TOPOUTPUT_SELECT          (1),   // 0=P, 1=Q, 2=8x8, 3=16x16
+		.TOPADDSUB_LOWERINPUT      (2),   // 0=A, 1=8x8, 2=16x16, 3=S-EXT
+		.TOPADDSUB_UPPERINPUT      (0),   // 0=Q, 1=C
+		.TOPADDSUB_CARRYSELECT     (2),   // 0=0, 1=1, 2=ACI, 3=CI
+		.BOTOUTPUT_SELECT          (1),   // 0=R, 1=S, 2=8x8, 3=16x16
+		.BOTADDSUB_LOWERINPUT      (2),   // 0=B, 1=8x8, 2=16x16, 3=S-EXT
+		.BOTADDSUB_UPPERINPUT      (0),   // 0=S, 1=D
+		.BOTADDSUB_CARRYSELECT     (2),   // 0=0, 1=1, 2=ACI, 3=CI
+		.MODE_8x8                  (0),
+		.A_SIGNED                  (0),
+		.B_SIGNED                  (0)
+	) testbench ();
+endmodule

techlibs/sf2/cells_map.v

@@ -1,17 +1,41 @@
-// module  \$_DFF_N_ (input D, C, output Q); SB_DFFN _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C)); endmodule
+module  \$_DFF_N_ (input D, C, output Q);
+  SLE _TECHMAP_REPLACE_ (.D(D), .CLK(!C), .EN(1'b1), .ALn(1'b1), .ADn(1'b1), .SLn(1'b1), .SD(1'b0), .LAT(1'b0), .Q(Q));
+endmodule
 
 module  \$_DFF_P_ (input D, C, output Q);
-  SLE _TECHMAP_REPLACE_ (
+  SLE _TECHMAP_REPLACE_ (.D(D), .CLK(C), .EN(1'b1), .ALn(1'b1), .ADn(1'b1), .SLn(1'b1), .SD(1'b0), .LAT(1'b0), .Q(Q));
-    .D(D),
+endmodule
-    .CLK(C),
+
-    .EN(1'b1),
+module \$_DFF_NN0_ (input D, C, R, output Q);
-    .ALn(1'b1),
+  SLE _TECHMAP_REPLACE_ (.D(D), .CLK(!C), .EN(1'b1), .ALn(R), .ADn(1'b1), .SLn(1'b1), .SD(1'b0), .LAT(1'b0), .Q(Q));
-    .ADn(1'b1),
+endmodule
-    .SLn(1'b1),
+
-    .SD(1'b0),
+module \$_DFF_NN1_ (input D, C, R, output Q);
-    .LAT(1'b0),
+  SLE _TECHMAP_REPLACE_ (.D(D), .CLK(!C), .EN(1'b1), .ALn(R), .ADn(1'b0), .SLn(1'b1), .SD(1'b0), .LAT(1'b0), .Q(Q));
-    .Q(Q)
+endmodule
-  );
+
+module \$_DFF_NP0_ (input D, C, R, output Q);
+  SLE _TECHMAP_REPLACE_ (.D(D), .CLK(!C), .EN(1'b1), .ALn(!R), .ADn(1'b1), .SLn(1'b1), .SD(1'b0), .LAT(1'b0), .Q(Q));
+endmodule
+
+module \$_DFF_NP1_ (input D, C, R, output Q);
+  SLE _TECHMAP_REPLACE_ (.D(D), .CLK(!C), .EN(1'b1), .ALn(!R), .ADn(1'b0), .SLn(1'b1), .SD(1'b0), .LAT(1'b0), .Q(Q));
+endmodule
+
+module \$_DFF_PN0_ (input D, C, R, output Q);
+  SLE _TECHMAP_REPLACE_ (.D(D), .CLK(C), .EN(1'b1), .ALn(R), .ADn(1'b1), .SLn(1'b1), .SD(1'b0), .LAT(1'b0), .Q(Q));
+endmodule
+
+module \$_DFF_PN1_ (input D, C, R, output Q);
+  SLE _TECHMAP_REPLACE_ (.D(D), .CLK(C), .EN(1'b1), .ALn(R), .ADn(1'b0), .SLn(1'b1), .SD(1'b0), .LAT(1'b0), .Q(Q));
+endmodule
+
+module \$_DFF_PP0_ (input D, C, R, output Q);
+  SLE _TECHMAP_REPLACE_ (.D(D), .CLK(C), .EN(1'b1), .ALn(!R), .ADn(1'b1), .SLn(1'b1), .SD(1'b0), .LAT(1'b0), .Q(Q));
+endmodule
+
+module \$_DFF_PP1_ (input D, C, R, output Q);
+  SLE _TECHMAP_REPLACE_ (.D(D), .CLK(C), .EN(1'b1), .ALn(!R), .ADn(1'b0), .SLn(1'b1), .SD(1'b0), .LAT(1'b0), .Q(Q));
 endmodule
 
 // module  \$_DFFE_NN_ (input D, C, E, output Q); SB_DFFNE _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .E(!E)); endmodule
@@ -20,16 +44,6 @@ endmodule
 // module  \$_DFFE_NP_ (input D, C, E, output Q); SB_DFFNE _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .E(E)); endmodule
 // module  \$_DFFE_PP_ (input D, C, E, output Q); SB_DFFE  _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .E(E)); endmodule
 //
-// module  \$_DFF_NN0_ (input D, C, R, output Q); SB_DFFNR _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .R(!R)); endmodule
-// module  \$_DFF_NN1_ (input D, C, R, output Q); SB_DFFNS _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .S(!R)); endmodule
-// module  \$_DFF_PN0_ (input D, C, R, output Q); SB_DFFR  _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .R(!R)); endmodule
-// module  \$_DFF_PN1_ (input D, C, R, output Q); SB_DFFS  _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .S(!R)); endmodule
-// 
-// module  \$_DFF_NP0_ (input D, C, R, output Q); SB_DFFNR _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .R(R)); endmodule
-// module  \$_DFF_NP1_ (input D, C, R, output Q); SB_DFFNS _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .S(R)); endmodule
-// module  \$_DFF_PP0_ (input D, C, R, output Q); SB_DFFR  _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .R(R)); endmodule
-// module  \$_DFF_PP1_ (input D, C, R, output Q); SB_DFFS  _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .S(R)); endmodule
-// 
 // module  \$__DFFE_NN0 (input D, C, E, R, output Q); SB_DFFNER _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .E(E), .R(!R)); endmodule
 // module  \$__DFFE_NN1 (input D, C, E, R, output Q); SB_DFFNES _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .E(E), .S(!R)); endmodule
 // module  \$__DFFE_PN0 (input D, C, E, R, output Q); SB_DFFER  _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .E(E), .R(!R)); endmodule

techlibs/sf2/cells_sim.v

@@ -1,39 +1,25 @@
-module SLE (
+// https://coredocs.s3.amazonaws.com/Libero/12_0_0/Tool/sf2_mlg.pdf
-	output Q,
+
-	input ADn,
+module ADD2 (
-	input ALn,
+
-	input CLK,
+	input A, B,
-	input D,
+	output Y
-	input LAT,
-	input SD,
-	input EN,
-	input SLn
 );
-	reg q_latch, q_ff;
+	assign Y = A & B;
+endmodule
 
-	always @(posedge CLK, negedge ALn) begin
+module ADD3 (
-		if (!ALn) begin
+	input A, B, C,
-			q_ff <= !ADn;
+	output Y
-		end else if (EN) begin
+);
-			if (!SLn)
+	assign Y = A & B & C;
-				q_ff <= SD;
+endmodule
-			else
-				q_ff <= D;
-		end
-	end
 
-	always @* begin
+module ADD4 (
-		if (!ALn) begin
+	input A, B, C, D,
-			q_latch <= !ADn;
+	output Y
-		end else if (CLK && EN) begin
+);
-			if (!SLn)
+	assign Y = A & B & C & D;
-				q_ff <= SD;
-			else
-				q_ff <= D;
-		end
-	end
-
-	assign Q = LAT ? q_latch : q_ff;
 endmodule
 
 module CFG1 (
@@ -74,6 +60,238 @@ module CFG4 (
 	assign Y = INIT >> {D, C, B, A};
 endmodule
 
+module BUFF (
+	input A,
+	output Y
+);
+	assign Y = A;
+endmodule
+
+module BUFD (
+	input A,
+	output Y
+);
+	assign Y = A;
+endmodule
+
+module CLKINT (
+	input A,
+	output Y
+);
+	assign Y = A;
+endmodule
+
+module CLKINT_PRESERVE (
+	input A,
+	output Y
+);
+	assign Y = A;
+endmodule
+
+module GCLKINT (
+	input A, EN,
+	output Y
+);
+	assign Y = A & EN;
+endmodule
+
+module RCLKINT (
+	input A,
+	output Y
+);
+	assign Y = A;
+endmodule
+
+module RGCLKINT (
+	input A, EN,
+	output Y
+);
+	assign Y = A & EN;
+endmodule
+
+module SLE (
+	output Q,
+	input ADn,
+	input ALn,
+	input CLK,
+	input D,
+	input LAT,
+	input SD,
+	input EN,
+	input SLn
+);
+	reg q_latch, q_ff;
+
+	always @(posedge CLK, negedge ALn) begin
+		if (!ALn) begin
+			q_ff <= !ADn;
+		end else if (EN) begin
+			if (!SLn)
+				q_ff <= SD;
+			else
+				q_ff <= D;
+		end
+	end
+
+	always @* begin
+		if (!ALn) begin
+			q_latch <= !ADn;
+		end else if (CLK && EN) begin
+			if (!SLn)
+				q_ff <= SD;
+			else
+				q_ff <= D;
+		end
+	end
+
+	assign Q = LAT ? q_latch : q_ff;
+endmodule
+
+// module AR1
+// module FCEND_BUFF
+// module FCINIT_BUFF
+// module FLASH_FREEZE
+// module OSCILLATOR
+// module SYSRESET
+// module SYSCTRL_RESET_STATUS
+// module LIVE_PROBE_FB
+// module GCLKBUF
+// module GCLKBUF_DIFF
+// module GCLKBIBUF
+// module DFN1
+// module DFN1C0
+// module DFN1E1
+// module DFN1E1C0
+// module DFN1E1P0
+// module DFN1P0
+// module DLN1
+// module DLN1C0
+// module DLN1P0
+
+module INV (
+	input A,
+	output Y
+);
+	assign Y = !A;
+endmodule
+
+module INVD (
+	input A,
+	output Y
+);
+	assign Y = !A;
+endmodule
+
+module MX2 (
+	input A, B, S,
+	output Y
+);
+	assign Y = S ? B : A;
+endmodule
+
+module MX4 (
+	input D0, D1, D2, D3, S0, S1,
+	output Y
+);
+	assign Y = S1 ? (S0 ? D3 : D2) : (S0 ? D1 : D0);
+endmodule
+
+module NAND2 (
+	input A, B,
+	output Y
+);
+	assign Y = !(A & B);
+endmodule
+
+module NAND3 (
+	input A, B, C,
+	output Y
+);
+	assign Y = !(A & B & C);
+endmodule
+
+module NAND4 (
+	input A, B, C, D,
+	output Y
+);
+	assign Y = !(A & B & C & D);
+endmodule
+
+module NOR2 (
+	input A, B,
+	output Y
+);
+	assign Y = !(A | B);
+endmodule
+
+module NOR3 (
+	input A, B, C,
+	output Y
+);
+	assign Y = !(A | B | C);
+endmodule
+
+module NOR4 (
+	input A, B, C, D,
+	output Y
+);
+	assign Y = !(A | B | C | D);
+endmodule
+
+module OR2 (
+	input A, B,
+	output Y
+);
+	assign Y = A | B;
+endmodule
+
+module OR3 (
+	input A, B, C,
+	output Y
+);
+	assign Y = A | B | C;
+endmodule
+
+module OR4 (
+	input A, B, C, D,
+	output Y
+);
+	assign Y = A | B | C | D;
+endmodule
+
+module XOR2 (
+	input A, B,
+	output Y
+);
+	assign Y = A ^ B;
+endmodule
+
+module XOR3 (
+	input A, B, C,
+	output Y
+);
+	assign Y = A ^ B ^ C;
+endmodule
+
+module XOR4 (
+	input A, B, C, D,
+	output Y
+);
+	assign Y = A ^ B ^ C ^ D;
+endmodule
+
+module XOR8 (
+	input A, B, C, D, E, F, G, H,
+	output Y
+);
+	assign Y = A ^ B ^ C ^ D ^ E ^ F ^ G ^ H;
+endmodule
+
+// module UJTAG
+// module BIBUF
+// module BIBUF_DIFF
+// module CLKBIBUF
+
 module CLKBUF (
 	input PAD,
 	output Y
@@ -81,6 +299,8 @@ module CLKBUF (
 	assign Y = PAD;
 endmodule
 
+// module CLKBUF_DIFF
+
 module INBUF (
 	input PAD,
 	output Y
@@ -88,9 +308,20 @@ module INBUF (
 	assign Y = PAD;
 endmodule
 
+// module INBUF_DIFF
+
 module OUTBUF (
 	input D,
 	output PAD
 );
 	assign PAD = D;
 endmodule
+
+// module OUTBUF_DIFF
+// module TRIBUFF
+// module TRIBUFF_DIFF
+// module DDR_IN
+// module DDR_OUT
+// module RAM1K18
+// module RAM64x18
+// module MACC

techlibs/sf2/sf2_iobs.cc

@@ -23,37 +23,8 @@
 USING_YOSYS_NAMESPACE
 PRIVATE_NAMESPACE_BEGIN
 
-struct Sf2IobsPass : public Pass {
+static void handle_iobufs(Module *module, bool clkbuf_mode)
-	Sf2IobsPass() : Pass("sf2_iobs", "SF2: insert IO buffers") { }
-	void help() YS_OVERRIDE
 {
-		//   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
-		log("\n");
-		log("    sf2_iobs [options] [selection]\n");
-		log("\n");
-		log("Add SF2 I/O buffers to top module IOs as needed.\n");
-		log("\n");
-	}
-	void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
-	{
-		log_header(design, "Executing sf2_iobs pass (insert IO buffers).\n");
-
-		size_t argidx;
-		for (argidx = 1; argidx < args.size(); argidx++)
-		{
-			// if (args[argidx] == "-singleton") {
-			// 	singleton_mode = true;
-			// 	continue;
-			// }
-			break;
-		}
-		extra_args(args, argidx, design);
-
-		Module *module = design->top_module();
-
-		if (module == nullptr)
-			log_cmd_error("No top module found.\n");
-
 	SigMap sigmap(module);
 
 	pool<SigBit> clk_bits;
@@ -63,11 +34,13 @@ struct Sf2IobsPass : public Pass {
 
 	for (auto cell : module->cells())
 	{
-			if (cell->type == "\\SLE") {
+		if (clkbuf_mode && cell->type == "\\SLE") {
 			for (auto bit : sigmap(cell->getPort("\\CLK")))
 				clk_bits.insert(bit);
 		}
-			if (cell->type.in("\\INBUF", "\\OUTBUF", "\\CLKBUF")) {
+		if (cell->type.in("\\INBUF", "\\OUTBUF", "\\TRIBUFF", "\\BIBUF", "\\CLKBUF", "\\CLKBIBUF",
+				"\\INBUF_DIFF", "\\OUTBUF_DIFF", "\\BIBUFF_DIFF", "\\TRIBUFF_DIFF", "\\CLKBUF_DIFF",
+				"\\GCLKBUF", "\\GCLKBUF_DIFF", "\\GCLKBIBUF")) {
 			for (auto bit : sigmap(cell->getPort("\\PAD")))
 				handled_io_bits.insert(bit);
 		}
@@ -94,7 +67,7 @@ struct Sf2IobsPass : public Pass {
 			if (wire->port_output) {
 				buf_type = "\\OUTBUF";
 				buf_port = "\\D";
-				} else if (clk_bits.count(canonical_bit)) {
+			} else if (clkbuf_mode && clk_bits.count(canonical_bit)) {
 				buf_type = "\\CLKBUF";
 				buf_port = "\\Y";
 			} else {
@@ -125,6 +98,100 @@ struct Sf2IobsPass : public Pass {
 	for (auto &it : pad_bits)
 		it.first->setPort("\\PAD", it.second);
 }
+
+static void handle_clkint(Module *module)
+{
+	SigMap sigmap(module);
+
+	pool<SigBit> clk_bits;
+	vector<SigBit> handled_clk_bits;
+
+	for (auto cell : module->cells())
+	{
+		if (cell->type == "\\SLE") {
+			for (auto bit : sigmap(cell->getPort("\\CLK")))
+				clk_bits.insert(bit);
+		}
+		if (cell->type.in("\\CLKBUF", "\\CLKBIBUF", "\\CLKBUF_DIFF", "\\GCLKBUF", "\\GCLKBUF_DIFF", "\\GCLKBIBUF",
+				"\\CLKINT", "\\CLKINT_PRESERVE", "\\GCLKINT", "\\RCLKINT", "\\RGCLKINT")) {
+			for (auto bit : sigmap(cell->getPort("\\Y")))
+				handled_clk_bits.push_back(bit);
+		}
+	}
+
+	for (auto bit : handled_clk_bits)
+		clk_bits.erase(bit);
+
+	for (auto cell : vector<Cell*>(module->cells()))
+	for (auto &conn : cell->connections())
+	{
+		if (!cell->output(conn.first))
+			continue;
+
+		SigSpec sig = conn.second;
+		bool did_something = false;
+
+		for (auto &bit : sig) {
+			SigBit canonical_bit = sigmap(bit);
+			if (clk_bits.count(canonical_bit)) {
+				Cell *c = module->addCell(NEW_ID, "\\CLKINT");
+				SigBit new_bit = module->addWire(NEW_ID);
+				c->setPort("\\A", new_bit);
+				c->setPort("\\Y", bit);
+				log("Added %s cell %s for clock signal %s.\n", log_id(c->type), log_id(c), log_signal(bit));
+				clk_bits.erase(canonical_bit);
+				did_something = true;
+				bit = new_bit;
+			}
+		}
+
+		if (did_something)
+			cell->setPort(conn.first, sig);
+	}
+
+	for (auto bit : clk_bits)
+		log_error("Failed to insert CLKINT for clock signal %s.\n", log_signal(bit));
+}
+
+struct Sf2IobsPass : public Pass {
+	Sf2IobsPass() : Pass("sf2_iobs", "SF2: insert IO buffers") { }
+	void help() YS_OVERRIDE
+	{
+		//   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
+		log("\n");
+		log("    sf2_iobs [options] [selection]\n");
+		log("\n");
+		log("Add SF2 I/O buffers and global buffers to top module as needed.\n");
+		log("\n");
+		log("    -clkbuf\n");
+		log("        Insert PAD->global_net clock buffers\n");
+		log("\n");
+	}
+	void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
+	{
+		bool clkbuf_mode = false;
+
+		log_header(design, "Executing sf2_iobs pass (insert IO buffers).\n");
+
+		size_t argidx;
+		for (argidx = 1; argidx < args.size(); argidx++)
+		{
+			if (args[argidx] == "-clkbuf") {
+				clkbuf_mode = true;
+				continue;
+			}
+			break;
+		}
+		extra_args(args, argidx, design);
+
+		Module *module = design->top_module();
+
+		if (module == nullptr)
+			log_cmd_error("No top module found.\n");
+
+		handle_iobufs(module, clkbuf_mode);
+		handle_clkint(module);
+	}
 } Sf2IobsPass;
 
 PRIVATE_NAMESPACE_END

techlibs/sf2/synth_sf2.cc

@@ -63,6 +63,9 @@ struct SynthSf2Pass : public ScriptPass
 		log("    -noiobs\n");
 		log("        run synthesis in \"block mode\", i.e. do not insert IO buffers\n");
 		log("\n");
+		log("    -clkbuf\n");
+		log("        insert direct PAD->global_net buffers\n");
+		log("\n");
 		log("    -retime\n");
 		log("        run 'abc' with -dff option\n");
 		log("\n");
@@ -73,7 +76,7 @@ struct SynthSf2Pass : public ScriptPass
 	}
 
 	string top_opt, edif_file, vlog_file, json_file;
-	bool flatten, retime, iobs;
+	bool flatten, retime, iobs, clkbuf;
 
 	void clear_flags() YS_OVERRIDE
 	{
@@ -84,6 +87,7 @@ struct SynthSf2Pass : public ScriptPass
 		flatten = true;
 		retime = false;
 		iobs = true;
+		clkbuf = false;
 	}
 
 	void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
@@ -130,6 +134,10 @@ struct SynthSf2Pass : public ScriptPass
 				iobs = false;
 				continue;
 			}
+			if (args[argidx] == "-clkbuf") {
+				clkbuf = true;
+				continue;
+			}
 			break;
 		}
 		extra_args(args, argidx, design);
@@ -201,8 +209,10 @@ struct SynthSf2Pass : public ScriptPass
 
 		if (check_label("map_iobs"))
 		{
-			if (iobs || help_mode)
+			if (help_mode)
-				run("sf2_iobs", "(unless -noiobs)");
+				run("sf2_iobs [-clkbuf]", "(unless -noiobs)");
+			else if (iobs)
+				run(clkbuf ? "sf2_iobs -clkbuf" : "sf2_iobs");
 			run("clean");
 		}
 

techlibs/xilinx/Makefile.inc

@@ -28,7 +28,8 @@ $(eval $(call add_share_file,share/xilinx,techlibs/xilinx/brams_bb.v))
 $(eval $(call add_share_file,share/xilinx,techlibs/xilinx/drams.txt))
 $(eval $(call add_share_file,share/xilinx,techlibs/xilinx/drams_map.v))
 $(eval $(call add_share_file,share/xilinx,techlibs/xilinx/arith_map.v))
-$(eval $(call add_share_file,share/xilinx,techlibs/xilinx/lut2lut.v))
+$(eval $(call add_share_file,share/xilinx,techlibs/xilinx/ff_map.v))
+$(eval $(call add_share_file,share/xilinx,techlibs/xilinx/lut_map.v))
 
 $(eval $(call add_gen_share_file,share/xilinx,techlibs/xilinx/brams_init_36.vh))
 $(eval $(call add_gen_share_file,share/xilinx,techlibs/xilinx/brams_init_32.vh))

techlibs/xilinx/arith_map.v

@@ -17,6 +17,9 @@
  *
  */
 
+// ============================================================================
+// LCU
+
 (* techmap_celltype = "$lcu" *)
 module _80_xilinx_lcu (P, G, CI, CO);
 	parameter WIDTH = 2;
@@ -28,10 +31,78 @@ module _80_xilinx_lcu (P, G, CI, CO);
 
 	wire _TECHMAP_FAIL_ = WIDTH <= 2;
 
+	genvar i;
+
+`ifdef _CLB_CARRY
+
+	localparam CARRY4_COUNT = (WIDTH + 3) / 4;
+	localparam MAX_WIDTH    = CARRY4_COUNT * 4;
+	localparam PAD_WIDTH    = MAX_WIDTH - WIDTH;
+
+	wire [MAX_WIDTH-1:0] S  = {{PAD_WIDTH{1'b0}}, P & ~G};
+	wire [MAX_WIDTH-1:0] C  = CO;
+
+	generate for (i = 0; i < CARRY4_COUNT; i = i + 1) begin:slice
+
+		// Partially occupied CARRY4
+		if ((i+1)*4 > WIDTH) begin
+
+			// First one
+			if (i == 0) begin
+				CARRY4 carry4_1st_part
+				(
+				.CYINIT(CI),
+				.CI    (1'd0),
+				.DI    (G [(Y_WIDTH - 1):i*4]),
+				.S     (S [(Y_WIDTH - 1):i*4]),
+				.CO    (CO[(Y_WIDTH - 1):i*4]),
+				);
+			// Another one
+			end else begin
+				CARRY4 carry4_part
+				(
+				.CYINIT(1'd0),
+				.CI    (C [i*4 - 1]),
+				.DI    (G [(Y_WIDTH - 1):i*4]),
+				.S     (S [(Y_WIDTH - 1):i*4]),
+				.CO    (CO[(Y_WIDTH - 1):i*4]),
+				);
+			end
+
+		// Fully occupied CARRY4
+		end else begin
+
+			// First one
+			if (i == 0) begin
+				CARRY4 carry4_1st_full
+				(
+				.CYINIT(CI),
+				.CI    (1'd0),
+				.DI    (G [((i+1)*4 - 1):i*4]),
+				.S     (S [((i+1)*4 - 1):i*4]),
+				.CO    (CO[((i+1)*4 - 1):i*4]),
+				);
+			// Another one
+			end else begin
+				CARRY4 carry4_full
+				(
+				.CYINIT(1'd0),
+				.CI    (C [i*4 - 1]),
+				.DI    (G [((i+1)*4 - 1):i*4]),
+				.S     (S [((i+1)*4 - 1):i*4]),
+				.CO    (CO[((i+1)*4 - 1):i*4]),
+				);
+			end
+
+		end
+
+	end endgenerate
+
+`elsif _EXPLICIT_CARRY
+
 	wire [WIDTH-1:0] C = {CO, CI};
 	wire [WIDTH-1:0] S = P & ~G;
 
-	genvar i;
 	generate for (i = 0; i < WIDTH; i = i + 1) begin:slice
 		MUXCY muxcy (
 			.CI(C[i]),
@@ -40,8 +111,28 @@ module _80_xilinx_lcu (P, G, CI, CO);
 			.O(CO[i])
 		);
 	end endgenerate
+
+`else
+
+	wire [WIDTH-1:0] C = {CO, CI};
+	wire [WIDTH-1:0] S = P & ~G;
+
+	generate for (i = 0; i < WIDTH; i = i + 1) begin:slice
+		MUXCY muxcy (
+			.CI(C[i]),
+			.DI(G[i]),
+			.S(S[i]),
+			.O(CO[i])
+		);
+	end endgenerate
+`endif
+
 endmodule
 
+
+// ============================================================================
+// ALU
+
 (* techmap_celltype = "$alu" *)
 module _80_xilinx_alu (A, B, CI, BI, X, Y, CO);
 	parameter A_SIGNED = 0;
@@ -49,6 +140,8 @@ module _80_xilinx_alu (A, B, CI, BI, X, Y, CO);
 	parameter A_WIDTH = 1;
 	parameter B_WIDTH = 1;
 	parameter Y_WIDTH = 1;
+	parameter _TECHMAP_CONSTVAL_CI_ = 0;
+	parameter _TECHMAP_CONSTMSK_CI_ = 0;
 
 	input [A_WIDTH-1:0] A;
 	input [B_WIDTH-1:0] B;
@@ -66,16 +159,189 @@ module _80_xilinx_alu (A, B, CI, BI, X, Y, CO);
 	wire [Y_WIDTH-1:0] AA = A_buf;
 	wire [Y_WIDTH-1:0] BB = BI ? ~B_buf : B_buf;
 
-	wire [Y_WIDTH-1:0] P = AA ^ BB;
+	genvar i;
-	wire [Y_WIDTH-1:0] G = AA & BB;
+
-	wire [Y_WIDTH-1:0] C = {CO, CI};
+`ifdef _CLB_CARRY
-	wire [Y_WIDTH-1:0] S = P & ~G;
+
+	localparam CARRY4_COUNT = (Y_WIDTH + 3) / 4;
+	localparam MAX_WIDTH    = CARRY4_COUNT * 4;
+	localparam PAD_WIDTH    = MAX_WIDTH - Y_WIDTH;
+
+	wire [MAX_WIDTH-1:0] S  = {{PAD_WIDTH{1'b0}}, AA ^ BB};
+	wire [MAX_WIDTH-1:0] DI = {{PAD_WIDTH{1'b0}}, AA & BB};
+
+	wire [MAX_WIDTH-1:0] C  = CO;
 
 	genvar i;
+	generate for (i = 0; i < CARRY4_COUNT; i = i + 1) begin:slice
+
+		// Partially occupied CARRY4
+		if ((i+1)*4 > Y_WIDTH) begin
+
+			// First one
+			if (i == 0) begin
+				CARRY4 #(.IS_INITIALIZED(1'd1)) carry4_1st_part
+				(
+				.CYINIT(CI),
+				.CI    (1'd0),
+				.DI    (DI[(Y_WIDTH - 1):i*4]),
+				.S     (S [(Y_WIDTH - 1):i*4]),
+				.O     (Y [(Y_WIDTH - 1):i*4]),
+				.CO    (CO[(Y_WIDTH - 1):i*4])
+				);
+			// Another one
+			end else begin
+				CARRY4 carry4_part
+				(
+				.CYINIT(1'd0),
+				.CI    (C [i*4 - 1]),
+				.DI    (DI[(Y_WIDTH - 1):i*4]),
+				.S     (S [(Y_WIDTH - 1):i*4]),
+				.O     (Y [(Y_WIDTH - 1):i*4]),
+				.CO    (CO[(Y_WIDTH - 1):i*4])
+				);
+			end
+
+		// Fully occupied CARRY4
+		end else begin
+
+			// First one
+			if (i == 0) begin
+				CARRY4 #(.IS_INITIALIZED(1'd1)) carry4_1st_full
+				(
+				.CYINIT(CI),
+				.CI    (1'd0),
+				.DI    (DI[((i+1)*4 - 1):i*4]),
+				.S     (S [((i+1)*4 - 1):i*4]),
+				.O     (Y [((i+1)*4 - 1):i*4]),
+				.CO    (CO[((i+1)*4 - 1):i*4])
+				);
+			// Another one
+			end else begin
+				CARRY4 carry4_full
+				(
+				.CYINIT(1'd0),
+				.CI    (C [i*4 - 1]),
+				.DI    (DI[((i+1)*4 - 1):i*4]),
+				.S     (S [((i+1)*4 - 1):i*4]),
+				.O     (Y [((i+1)*4 - 1):i*4]),
+				.CO    (CO[((i+1)*4 - 1):i*4])
+				);
+			end
+
+		end
+
+	end endgenerate
+
+`elsif _EXPLICIT_CARRY
+
+	wire [Y_WIDTH-1:0] S = AA ^ BB;
+	wire [Y_WIDTH-1:0] DI = AA & BB;
+
+	wire CINIT;
+	// Carry chain.
+	//
+	// VPR requires that the carry chain never hit the fabric.	The CO input
+	// to this techmap is the carry outputs for synthesis, e.g. might hit the
+	// fabric.
+	//
+	// So we maintain two wire sets, CO_CHAIN is the carry that is for VPR,
+	// e.g. off fabric dedicated chain.  CO is the carry outputs that are
+	// available to the fabric.
+	wire [Y_WIDTH-1:0] CO_CHAIN;
+	wire [Y_WIDTH-1:0] C = {CO_CHAIN, CINIT};
+
+	// If carry chain is being initialized to a constant, techmap the constant
+	// source.	Otherwise techmap the fabric source.
+	generate for (i = 0; i < 1; i = i + 1) begin:slice
+		CARRY0 #(.CYINIT_FABRIC(1)) carry(
+			.CI_INIT(CI),
+			.DI(DI[0]),
+			.S(S[0]),
+			.CO_CHAIN(CO_CHAIN[0]),
+			.CO_FABRIC(CO[0]),
+			.O(Y[0])
+		);
+	end endgenerate
+
+	generate for (i = 1; i < Y_WIDTH-1; i = i + 1) begin:slice
+		if(i % 4 == 0) begin
+			CARRY0 carry (
+				.CI(C[i]),
+				.DI(DI[i]),
+				.S(S[i]),
+				.CO_CHAIN(CO_CHAIN[i]),
+				.CO_FABRIC(CO[i]),
+				.O(Y[i])
+			);
+		end
+		else
+		begin
+			CARRY carry (
+				.CI(C[i]),
+				.DI(DI[i]),
+				.S(S[i]),
+				.CO_CHAIN(CO_CHAIN[i]),
+				.CO_FABRIC(CO[i]),
+				.O(Y[i])
+			);
+		end
+	end endgenerate
+
+	generate for (i = Y_WIDTH-1; i < Y_WIDTH; i = i + 1) begin:slice
+		if(i % 4 == 0) begin
+			CARRY0 top_of_carry (
+				.CI(C[i]),
+				.DI(DI[i]),
+				.S(S[i]),
+				.CO_CHAIN(CO_CHAIN[i]),
+				.O(Y[i])
+			);
+		end
+		else
+		begin
+			CARRY top_of_carry (
+				.CI(C[i]),
+				.DI(DI[i]),
+				.S(S[i]),
+				.CO_CHAIN(CO_CHAIN[i]),
+				.O(Y[i])
+			);
+		end
+		// Turns out CO_FABRIC and O both use [ABCD]MUX, so provide
+		// a non-congested path to output the top of the carry chain.
+		// Registering the output of the CARRY block would solve this, but not
+		// all designs do that.
+		if((i+1) % 4 == 0) begin
+			CARRY0 carry_output (
+				.CI(CO_CHAIN[i]),
+				.DI(0),
+				.S(0),
+				.O(CO[i])
+			);
+		end
+		else
+		begin
+			CARRY carry_output (
+				.CI(CO_CHAIN[i]),
+				.DI(0),
+				.S(0),
+				.O(CO[i])
+			);
+		end
+	end endgenerate
+
+`else
+
+	wire [Y_WIDTH-1:0] S = AA ^ BB;
+	wire [Y_WIDTH-1:0] DI = AA & BB;
+
+	wire [Y_WIDTH-1:0] C = {CO, CI};
+
 	generate for (i = 0; i < Y_WIDTH; i = i + 1) begin:slice
 		MUXCY muxcy (
 			.CI(C[i]),
-			.DI(G[i]),
+			.DI(DI[i]),
 			.S(S[i]),
 			.O(CO[i])
 		);
@@ -86,6 +352,8 @@ module _80_xilinx_alu (A, B, CI, BI, X, Y, CO);
 		);
 	end endgenerate
 
-	assign X = P;
+`endif
+
+	assign X = S;
 endmodule
 

techlibs/xilinx/cells_map.v

@@ -1,86 +1,20 @@
+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
 
-module  \$_DFF_N_ (input D, C, output Q); FDRE #(.INIT(|0), .IS_C_INVERTED(|1), .IS_D_INVERTED(|0), .IS_R_INVERTED(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .R(1'b0)); endmodule
+// Empty for now
-module  \$_DFF_P_ (input D, C, output Q); FDRE #(.INIT(|0), .IS_C_INVERTED(|0), .IS_D_INVERTED(|0), .IS_R_INVERTED(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .R(1'b0)); endmodule
-
-module  \$_DFFE_NP_ (input D, C, E, output Q); FDRE #(.INIT(|0), .IS_C_INVERTED(|1), .IS_D_INVERTED(|0), .IS_R_INVERTED(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(E), .R(1'b0)); endmodule
-module  \$_DFFE_PP_ (input D, C, E, output Q); FDRE #(.INIT(|0), .IS_C_INVERTED(|0), .IS_D_INVERTED(|0), .IS_R_INVERTED(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(E), .R(1'b0)); endmodule
-
-module  \$_DFF_NN0_ (input D, C, R, output Q); FDCE #(.INIT(|0), .IS_C_INVERTED(|1), .IS_D_INVERTED(|0), .IS_CLR_INVERTED(|1)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .CLR(R)); endmodule
-module  \$_DFF_NP0_ (input D, C, R, output Q); FDCE #(.INIT(|0), .IS_C_INVERTED(|1), .IS_D_INVERTED(|0), .IS_CLR_INVERTED(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .CLR(R)); endmodule
-module  \$_DFF_PN0_ (input D, C, R, output Q); FDCE #(.INIT(|0), .IS_C_INVERTED(|0), .IS_D_INVERTED(|0), .IS_CLR_INVERTED(|1)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .CLR(R)); endmodule
-module  \$_DFF_PP0_ (input D, C, R, output Q); FDCE #(.INIT(|0), .IS_C_INVERTED(|0), .IS_D_INVERTED(|0), .IS_CLR_INVERTED(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .CLR(R)); endmodule
-
-module  \$_DFF_NN1_ (input D, C, R, output Q); FDPE #(.INIT(|0), .IS_C_INVERTED(|1), .IS_D_INVERTED(|0), .IS_PRE_INVERTED(|1)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .PRE(R)); endmodule
-module  \$_DFF_NP1_ (input D, C, R, output Q); FDPE #(.INIT(|0), .IS_C_INVERTED(|1), .IS_D_INVERTED(|0), .IS_PRE_INVERTED(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .PRE(R)); endmodule
-module  \$_DFF_PN1_ (input D, C, R, output Q); FDPE #(.INIT(|0), .IS_C_INVERTED(|0), .IS_D_INVERTED(|0), .IS_PRE_INVERTED(|1)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .PRE(R)); endmodule
-module  \$_DFF_PP1_ (input D, C, R, output Q); FDPE #(.INIT(|0), .IS_C_INVERTED(|0), .IS_D_INVERTED(|0), .IS_PRE_INVERTED(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .PRE(R)); endmodule
-
-`ifndef NO_LUT
-module \$lut (A, Y);
-  parameter WIDTH = 0;
-  parameter LUT = 0;
-
-  input [WIDTH-1:0] A;
-  output Y;
-
-  generate
-    if (WIDTH == 1) begin
-      LUT1 #(.INIT(LUT)) _TECHMAP_REPLACE_ (.O(Y),
-        .I0(A[0]));
-    end else
-    if (WIDTH == 2) begin
-      LUT2 #(.INIT(LUT)) _TECHMAP_REPLACE_ (.O(Y),
-        .I0(A[0]), .I1(A[1]));
-    end else
-    if (WIDTH == 3) begin
-      LUT3 #(.INIT(LUT)) _TECHMAP_REPLACE_ (.O(Y),
-        .I0(A[0]), .I1(A[1]), .I2(A[2]));
-    end else
-    if (WIDTH == 4) begin
-      LUT4 #(.INIT(LUT)) _TECHMAP_REPLACE_ (.O(Y),
-        .I0(A[0]), .I1(A[1]), .I2(A[2]),
-        .I3(A[3]));
-    end else
-    if (WIDTH == 5) begin
-      LUT5 #(.INIT(LUT)) _TECHMAP_REPLACE_ (.O(Y),
-        .I0(A[0]), .I1(A[1]), .I2(A[2]),
-        .I3(A[3]), .I4(A[4]));
-    end else
-    if (WIDTH == 6) begin
-      LUT6 #(.INIT(LUT)) _TECHMAP_REPLACE_ (.O(Y),
-        .I0(A[0]), .I1(A[1]), .I2(A[2]),
-        .I3(A[3]), .I4(A[4]), .I5(A[5]));
-    end else
-    if (WIDTH == 7) begin
-      wire T0, T1;
-      LUT6 #(.INIT(LUT[63:0])) fpga_lut_0 (.O(T0),
-        .I0(A[0]), .I1(A[1]), .I2(A[2]),
-        .I3(A[3]), .I4(A[4]), .I5(A[5]));
-      LUT6 #(.INIT(LUT[127:64])) fpga_lut_1 (.O(T1),
-        .I0(A[0]), .I1(A[1]), .I2(A[2]),
-        .I3(A[3]), .I4(A[4]), .I5(A[5]));
-      MUXF7 fpga_mux_0 (.O(Y), .I0(T0), .I1(T1), .S(A[6]));
-    end else
-    if (WIDTH == 8) begin
-      wire T0, T1, T2, T3, T4, T5;
-      LUT6 #(.INIT(LUT[63:0])) fpga_lut_0 (.O(T0),
-        .I0(A[0]), .I1(A[1]), .I2(A[2]),
-        .I3(A[3]), .I4(A[4]), .I5(A[5]));
-      LUT6 #(.INIT(LUT[127:64])) fpga_lut_1 (.O(T1),
-        .I0(A[0]), .I1(A[1]), .I2(A[2]),
-        .I3(A[3]), .I4(A[4]), .I5(A[5]));
-      LUT6 #(.INIT(LUT[191:128])) fpga_lut_2 (.O(T2),
-        .I0(A[0]), .I1(A[1]), .I2(A[2]),
-        .I3(A[3]), .I4(A[4]), .I5(A[5]));
-      LUT6 #(.INIT(LUT[255:192])) fpga_lut_3 (.O(T3),
-        .I0(A[0]), .I1(A[1]), .I2(A[2]),
-        .I3(A[3]), .I4(A[4]), .I5(A[5]));
-      MUXF7 fpga_mux_0 (.O(T4), .I0(T0), .I1(T1), .S(A[6]));
-      MUXF7 fpga_mux_1 (.O(T5), .I0(T2), .I1(T3), .S(A[6]));
-      MUXF8 fpga_mux_2 (.O(Y), .I0(T4), .I1(T5), .S(A[7]));
-    end else begin
-      wire _TECHMAP_FAIL_ = 1;
-    end
-  endgenerate
-endmodule
-`endif

techlibs/xilinx/cells_sim.v

@@ -1,3 +1,21 @@
+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
 
 // See Xilinx UG953 and UG474 for a description of the cell types below.
 // http://www.xilinx.com/support/documentation/user_guides/ug474_7Series_CLB.pdf
@@ -104,6 +122,29 @@ module CARRY4(output [3:0] CO, O, input CI, CYINIT, input [3:0] DI, S);
   assign CO[3] = S[3] ? CO[2] : DI[3];
 endmodule
 
+`ifdef _EXPLICIT_CARRY
+
+module CARRY0(output CO_CHAIN, CO_FABRIC, O, input CI, CI_INIT, DI, S);
+  parameter CYINIT_FABRIC = 0;
+  wire CI_COMBINE;
+  if(CYINIT_FABRIC) begin
+    assign CI_COMBINE = CI_INIT;
+  end else begin
+    assign CI_COMBINE = CI;
+  end
+  assign CO_CHAIN = S ? CI_COMBINE : DI;
+  assign CO_FABRIC = S ? CI_COMBINE : DI;
+  assign O = S ^ CI_COMBINE;
+endmodule
+
+module CARRY(output CO_CHAIN, CO_FABRIC, O, input CI, DI, S);
+  assign CO_CHAIN = S ? CI : DI;
+  assign CO_FABRIC = S ? CI : DI;
+  assign O = S ^ CI;
+endmodule
+
+`endif
+
 module FDRE (output reg Q, input C, CE, D, R);
   parameter [0:0] INIT = 1'b0;
   parameter [0:0] IS_C_INVERTED = 1'b0;
@@ -156,6 +197,30 @@ module FDPE (output reg Q, input C, CE, D, PRE);
   endcase endgenerate
 endmodule
 
+module FDRE_1 (output reg Q, input C, CE, D, R);
+  parameter [0:0] INIT = 1'b0;
+  initial Q <= INIT;
+  always @(negedge C) if (R) Q <= 1'b0; else if(CE) Q <= D;
+endmodule
+
+module FDSE_1 (output reg Q, input C, CE, D, S);
+  parameter [0:0] INIT = 1'b1;
+  initial Q <= INIT;
+  always @(negedge C) if (S) Q <= 1'b1; else if(CE) Q <= D;
+endmodule
+
+module FDCE_1 (output reg Q, input C, CE, D, CLR);
+  parameter [0:0] INIT = 1'b0;
+  initial Q <= INIT;
+  always @(negedge C, posedge CLR) if (CLR) Q <= 1'b0; else if (CE) Q <= D;
+endmodule
+
+module FDPE_1 (output reg Q, input C, CE, D, PRE);
+  parameter [0:0] INIT = 1'b1;
+  initial Q <= INIT;
+  always @(negedge C, posedge PRE) if (PRE) Q <= 1'b1; else if (CE) Q <= D;
+endmodule
+
 module RAM64X1D (
   output DPO, SPO,
   input  D, WCLK, WE,

techlibs/xilinx/cells_xtra.sh

@@ -115,7 +115,7 @@ function xtract_cell_decl()
 	xtract_cell_decl PS7
 	xtract_cell_decl PULLDOWN
 	xtract_cell_decl PULLUP
-	# xtract_cell_decl RAM128X1D
+	xtract_cell_decl RAM128X1D
 	xtract_cell_decl RAM128X1S
 	xtract_cell_decl RAM256X1S
 	xtract_cell_decl RAM32M
@@ -124,7 +124,7 @@ function xtract_cell_decl()
 	xtract_cell_decl RAM32X1S_1
 	xtract_cell_decl RAM32X2S
 	xtract_cell_decl RAM64M
-	# xtract_cell_decl RAM64X1D
+	xtract_cell_decl RAM64X1D
 	xtract_cell_decl RAM64X1S
 	xtract_cell_decl RAM64X1S_1
 	xtract_cell_decl RAM64X2S

techlibs/xilinx/cells_xtra.v

@@ -3695,6 +3695,25 @@ module RAM128X1S (...);
     input A0, A1, A2, A3, A4, A5, A6, D, WCLK, WE;
 endmodule
 
+module RAM128X1D (
+  output       DPO, SPO,
+  input        D, WCLK, WE,
+  input  [6:0] A, DPRA
+);
+	parameter [127:0] INIT = 128'bx;
+	parameter IS_WCLK_INVERTED = 0;
+endmodule
+
+module RAM64X1D (
+  output DPO, SPO,
+  input  D, WCLK, WE,
+  input  A0, A1, A2, A3, A4, A5,
+  input  DPRA0, DPRA1, DPRA2, DPRA3, DPRA4, DPRA5
+);
+	parameter [63:0] INIT = 64'bx;
+	parameter IS_WCLK_INVERTED = 0;
+endmodule
+
 module RAM256X1S (...);
     parameter [255:0] INIT = 256'h0;
     parameter [0:0] IS_WCLK_INVERTED = 1'b0;

techlibs/xilinx/ff_map.v

@@ -0,0 +1,42 @@
+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+// ============================================================================
+// FF mapping
+
+`ifndef _NO_FFS
+
+module  \$_DFF_N_   (input D, C, output Q);    FDRE_1 #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .R(1'b0)); endmodule
+module  \$_DFF_P_   (input D, C, output Q);    FDRE   #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .R(1'b0)); endmodule
+
+module  \$_DFFE_NP_ (input D, C, E, output Q); FDRE_1 #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(E),    .R(1'b0)); endmodule
+module  \$_DFFE_PP_ (input D, C, E, output Q); FDRE   #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(E),    .R(1'b0)); endmodule
+
+module  \$_DFF_NN0_ (input D, C, R, output Q); FDCE_1 #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .CLR(!R)); endmodule
+module  \$_DFF_NP0_ (input D, C, R, output Q); FDCE_1 #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .CLR( R)); endmodule
+module  \$_DFF_PN0_ (input D, C, R, output Q); FDCE   #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .CLR(!R)); endmodule
+module  \$_DFF_PP0_ (input D, C, R, output Q); FDCE   #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .CLR( R)); endmodule
+
+module  \$_DFF_NN1_ (input D, C, R, output Q); FDPE_1 #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .PRE(!R)); endmodule
+module  \$_DFF_NP1_ (input D, C, R, output Q); FDPE_1 #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .PRE( R)); endmodule
+module  \$_DFF_PN1_ (input D, C, R, output Q); FDPE   #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .PRE(!R)); endmodule
+module  \$_DFF_PP1_ (input D, C, R, output Q); FDPE   #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .PRE( R)); endmodule
+
+`endif
+

techlibs/xilinx/lut2lut.v

@@ -1,65 +0,0 @@
-module LUT1(output O, input I0);
-  parameter [1:0] INIT = 0;
-  \$lut #(
-    .WIDTH(1),
-    .LUT(INIT)
-  ) _TECHMAP_REPLACE_ (
-    .A(I0),
-    .Y(O)
-  );
-endmodule
-
-module LUT2(output O, input I0, I1);
-  parameter [3:0] INIT = 0;
-  \$lut #(
-    .WIDTH(2),
-    .LUT(INIT)
-  ) _TECHMAP_REPLACE_ (
-    .A({I1, I0}),
-    .Y(O)
-  );
-endmodule
-
-module LUT3(output O, input I0, I1, I2);
-  parameter [7:0] INIT = 0;
-  \$lut #(
-    .WIDTH(3),
-    .LUT(INIT)
-  ) _TECHMAP_REPLACE_ (
-    .A({I2, I1, I0}),
-    .Y(O)
-  );
-endmodule
-
-module LUT4(output O, input I0, I1, I2, I3);
-  parameter [15:0] INIT = 0;
-  \$lut #(
-    .WIDTH(4),
-    .LUT(INIT)
-  ) _TECHMAP_REPLACE_ (
-    .A({I3, I2, I1, I0}),
-    .Y(O)
-  );
-endmodule
-
-module LUT5(output O, input I0, I1, I2, I3, I4);
-  parameter [31:0] INIT = 0;
-  \$lut #(
-    .WIDTH(5),
-    .LUT(INIT)
-  ) _TECHMAP_REPLACE_ (
-    .A({I4, I3, I2, I1, I0}),
-    .Y(O)
-  );
-endmodule
-
-module LUT6(output O, input I0, I1, I2, I3, I4, I5);
-  parameter [63:0] INIT = 0;
-  \$lut #(
-    .WIDTH(6),
-    .LUT(INIT)
-  ) _TECHMAP_REPLACE_ (
-    .A({I5, I4, I3, I2, I1, I0}),
-    .Y(O)
-  );
-endmodule

techlibs/xilinx/lut_map.v

@@ -0,0 +1,94 @@
+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+// ============================================================================
+// LUT mapping
+
+`ifndef _NO_LUTS
+
+module \$lut (A, Y);
+  parameter WIDTH = 0;
+  parameter LUT = 0;
+
+  input [WIDTH-1:0] A;
+  output Y;
+
+  generate
+    if (WIDTH == 1) begin
+      LUT1 #(.INIT(LUT)) _TECHMAP_REPLACE_ (.O(Y),
+        .I0(A[0]));
+    end else
+    if (WIDTH == 2) begin
+      LUT2 #(.INIT(LUT)) _TECHMAP_REPLACE_ (.O(Y),
+        .I0(A[0]), .I1(A[1]));
+    end else
+    if (WIDTH == 3) begin
+      LUT3 #(.INIT(LUT)) _TECHMAP_REPLACE_ (.O(Y),
+        .I0(A[0]), .I1(A[1]), .I2(A[2]));
+    end else
+    if (WIDTH == 4) begin
+      LUT4 #(.INIT(LUT)) _TECHMAP_REPLACE_ (.O(Y),
+        .I0(A[0]), .I1(A[1]), .I2(A[2]),
+        .I3(A[3]));
+    end else
+    if (WIDTH == 5) begin
+      LUT5 #(.INIT(LUT)) _TECHMAP_REPLACE_ (.O(Y),
+        .I0(A[0]), .I1(A[1]), .I2(A[2]),
+        .I3(A[3]), .I4(A[4]));
+    end else
+    if (WIDTH == 6) begin
+      LUT6 #(.INIT(LUT)) _TECHMAP_REPLACE_ (.O(Y),
+        .I0(A[0]), .I1(A[1]), .I2(A[2]),
+        .I3(A[3]), .I4(A[4]), .I5(A[5]));
+    end else
+    if (WIDTH == 7) begin
+      wire T0, T1;
+      LUT6 #(.INIT(LUT[63:0])) fpga_lut_0 (.O(T0),
+        .I0(A[0]), .I1(A[1]), .I2(A[2]),
+        .I3(A[3]), .I4(A[4]), .I5(A[5]));
+      LUT6 #(.INIT(LUT[127:64])) fpga_lut_1 (.O(T1),
+        .I0(A[0]), .I1(A[1]), .I2(A[2]),
+        .I3(A[3]), .I4(A[4]), .I5(A[5]));
+      MUXF7 fpga_mux_0 (.O(Y), .I0(T0), .I1(T1), .S(A[6]));
+    end else
+    if (WIDTH == 8) begin
+      wire T0, T1, T2, T3, T4, T5;
+      LUT6 #(.INIT(LUT[63:0])) fpga_lut_0 (.O(T0),
+        .I0(A[0]), .I1(A[1]), .I2(A[2]),
+        .I3(A[3]), .I4(A[4]), .I5(A[5]));
+      LUT6 #(.INIT(LUT[127:64])) fpga_lut_1 (.O(T1),
+        .I0(A[0]), .I1(A[1]), .I2(A[2]),
+        .I3(A[3]), .I4(A[4]), .I5(A[5]));
+      LUT6 #(.INIT(LUT[191:128])) fpga_lut_2 (.O(T2),
+        .I0(A[0]), .I1(A[1]), .I2(A[2]),
+        .I3(A[3]), .I4(A[4]), .I5(A[5]));
+      LUT6 #(.INIT(LUT[255:192])) fpga_lut_3 (.O(T3),
+        .I0(A[0]), .I1(A[1]), .I2(A[2]),
+        .I3(A[3]), .I4(A[4]), .I5(A[5]));
+      MUXF7 fpga_mux_0 (.O(T4), .I0(T0), .I1(T1), .S(A[6]));
+      MUXF7 fpga_mux_1 (.O(T5), .I0(T2), .I1(T3), .S(A[6]));
+      MUXF8 fpga_mux_2 (.O(Y), .I0(T4), .I1(T5), .S(A[7]));
+    end else begin
+      wire _TECHMAP_FAIL_ = 1;
+    end
+  endgenerate
+endmodule
+
+`endif
+

techlibs/xilinx/synth_xilinx.cc

@@ -63,6 +63,12 @@ struct SynthXilinxPass : public Pass
 		log("        generate an output netlist (and BLIF file) suitable for VPR\n");
 		log("        (this feature is experimental and incomplete)\n");
 		log("\n");
+		log("    -nobram\n");
+		log("        disable infering of block rams\n");
+		log("\n");
+		log("    -nodram\n");
+		log("        disable infering of distributed rams\n");
+		log("\n");
 		log("    -run <from_label>:<to_label>\n");
 		log("        only run the commands between the labels (see below). an empty\n");
 		log("        from label is synonymous to 'begin', and empty to label is\n");
@@ -90,11 +96,11 @@ struct SynthXilinxPass : public Pass
 		log("    coarse:\n");
 		log("        synth -run coarse\n");
 		log("\n");
-		log("    bram:\n");
+		log("    bram: (only executed when '-nobram' is not given)\n");
 		log("        memory_bram -rules +/xilinx/brams.txt\n");
 		log("        techmap -map +/xilinx/brams_map.v\n");
 		log("\n");
-		log("    dram:\n");
+		log("    dram: (only executed when '-nodram' is not given)\n");
 		log("        memory_bram -rules +/xilinx/drams.txt\n");
 		log("        techmap -map +/xilinx/drams_map.v\n");
 		log("\n");
@@ -104,16 +110,17 @@ struct SynthXilinxPass : public Pass
 		log("        dffsr2dff\n");
 		log("        dff2dffe\n");
 		log("        opt -full\n");
-		log("        techmap -map +/techmap.v -map +/xilinx/arith_map.v\n");
+		log("        techmap -map +/techmap.v -map +/xilinx/arith_map.v -map +/xilinx/ff_map.v\n");
 		log("        opt -fast\n");
 		log("\n");
 		log("    map_luts:\n");
-		log("        abc -luts 2:2,3,6:5,10,20 [-dff]\n");
+		log("        abc -luts 2:2,3,6:5,10,20 [-dff] (without '-vpr' only!)\n");
+		log("        abc -lut 5 [-dff] (with '-vpr' only!)\n");
 		log("        clean\n");
 		log("\n");
 		log("    map_cells:\n");
-		log("        techmap -map +/xilinx/cells_map.v (with -D NO_LUT in vpr mode)\n");
+		log("        techmap -map +/xilinx/cells_map.v\n");
-		log("        dffinit -ff FDRE Q INIT -ff FDCE Q INIT -ff FDPE Q INIT\n");
+		log("        dffinit -ff FDRE Q INIT -ff FDCE Q INIT -ff FDPE Q INIT -ff FDSE Q INIT\n");
 		log("        clean\n");
 		log("\n");
 		log("    check:\n");
@@ -137,6 +144,8 @@ struct SynthXilinxPass : public Pass
 		bool flatten = false;
 		bool retime = false;
 		bool vpr = false;
+		bool nobram = false;
+		bool nodram = false;
 
 		size_t argidx;
 		for (argidx = 1; argidx < args.size(); argidx++)
@@ -173,6 +182,14 @@ struct SynthXilinxPass : public Pass
 				vpr = true;
 				continue;
 			}
+			if (args[argidx] == "-nobram") {
+				nobram = true;
+				continue;
+			}
+			if (args[argidx] == "-nodram") {
+				nodram = true;
+				continue;
+			}
 			break;
 		}
 		extra_args(args, argidx, design);
@@ -187,9 +204,18 @@ struct SynthXilinxPass : public Pass
 
 		if (check_label(active, run_from, run_to, "begin"))
 		{
+			if (vpr) {
+				Pass::call(design, "read_verilog -lib -D_EXPLICIT_CARRY +/xilinx/cells_sim.v");
+			} else {
 				Pass::call(design, "read_verilog -lib +/xilinx/cells_sim.v");
+			}
+
 			Pass::call(design, "read_verilog -lib +/xilinx/cells_xtra.v");
+
+			if (!nobram) {
 				Pass::call(design, "read_verilog -lib +/xilinx/brams_bb.v");
+			}
+
 			Pass::call(design, stringf("hierarchy -check %s", top_opt.c_str()));
 		}
 
@@ -206,15 +232,19 @@ struct SynthXilinxPass : public Pass
 
 		if (check_label(active, run_from, run_to, "bram"))
 		{
+			if (!nobram) {
 				Pass::call(design, "memory_bram -rules +/xilinx/brams.txt");
 				Pass::call(design, "techmap -map +/xilinx/brams_map.v");
 			}
+		}
 
 		if (check_label(active, run_from, run_to, "dram"))
 		{
+			if (!nodram) {
 				Pass::call(design, "memory_bram -rules +/xilinx/drams.txt");
 				Pass::call(design, "techmap -map +/xilinx/drams_map.v");
 			}
+		}
 
 		if (check_label(active, run_from, run_to, "fine"))
 		{
@@ -223,7 +253,14 @@ struct SynthXilinxPass : public Pass
 			Pass::call(design, "dffsr2dff");
 			Pass::call(design, "dff2dffe");
 			Pass::call(design, "opt -full");
-			Pass::call(design, "techmap -map +/techmap.v -map +/xilinx/arith_map.v");
+
+			if (vpr) {
+				Pass::call(design, "techmap -map +/techmap.v -map +/xilinx/arith_map.v -map +/xilinx/ff_map.v -D _EXPLICIT_CARRY");
+			} else {
+				Pass::call(design, "techmap -map +/techmap.v -map +/xilinx/arith_map.v -map +/xilinx/ff_map.v");
+			}
+
+			Pass::call(design, "hierarchy -check");
 			Pass::call(design, "opt -fast");
 		}
 
@@ -231,14 +268,13 @@ struct SynthXilinxPass : public Pass
 		{
 			Pass::call(design, "abc -luts 2:2,3,6:5,10,20" + string(retime ? " -dff" : ""));
 			Pass::call(design, "clean");
+			Pass::call(design, "techmap -map +/xilinx/lut_map.v");
 		}
 
 		if (check_label(active, run_from, run_to, "map_cells"))
 		{
 			Pass::call(design, "techmap -map +/xilinx/cells_map.v");
-			if (vpr)
+			Pass::call(design, "dffinit -ff FDRE Q INIT -ff FDCE Q INIT -ff FDPE Q INIT -ff FDSE Q INIT");
-			    Pass::call(design, "techmap -map +/xilinx/lut2lut.v");
-			Pass::call(design, "dffinit -ff FDRE Q INIT -ff FDCE Q INIT -ff FDPE Q INIT");
 			Pass::call(design, "clean");
 		}
 
@@ -252,7 +288,7 @@ struct SynthXilinxPass : public Pass
 		if (check_label(active, run_from, run_to, "edif"))
 		{
 			if (!edif_file.empty())
-				Pass::call(design, stringf("write_edif %s", edif_file.c_str()));
+				Pass::call(design, stringf("write_edif -pvector bra %s", edif_file.c_str()));
 		}
 		if (check_label(active, run_from, run_to, "blif"))
 		{

tests/asicworld/xfirrtl

@@ -6,7 +6,6 @@ code_hdl_models_d_latch_gates.v	combinational loop
 code_hdl_models_dff_async_reset.v	$adff
 code_hdl_models_tff_async_reset.v	$adff
 code_hdl_models_uart.v	$adff
-code_specman_switch_fabric.v	subfield assignment (bits() <= ...)
 code_tidbits_asyn_reset.v	$adff
 code_tidbits_reg_seq_example.v	$adff
 code_verilog_tutorial_always_example.v	empty module

tests/opt/opt_ff.v

@@ -0,0 +1,21 @@
+module top(
+    input clk,
+    input rst,
+    input [2:0] a,
+    output [1:0] b
+);
+    reg [2:0] b_reg;
+    initial begin
+        b_reg <= 3'b0;
+    end
+
+    assign b = b_reg[1:0];
+    always @(posedge clk or posedge rst) begin
+        if(rst) begin
+            b_reg <= 3'b0;
+        end else begin
+            b_reg <= a;
+        end
+    end
+endmodule
+

tests/opt/opt_ff.ys

@@ -0,0 +1,3 @@
+read_verilog opt_ff.v
+synth_ice40
+ice40_unlut

tests/simple/generate.v

@@ -90,5 +90,61 @@ generate
 		endcase
 	end
 endgenerate
-
+endmodule
+
+// ------------------------------------------
+
+module gen_test4(a, b);
+
+input [3:0] a;
+output [3:0] b;
+
+genvar i;
+generate
+	for (i=0; i < 3; i=i+1) begin : foo
+		localparam PREV = i - 1;
+		wire temp;
+		if (i == 0)
+			assign temp = a[0];
+		else
+			assign temp = foo[PREV].temp & a[i];
+		assign b[i] = temp;
+	end
+endgenerate
+endmodule
+
+// ------------------------------------------
+
+module gen_test5(input_bits, out);
+
+parameter WIDTH = 256;
+parameter CHUNK = 4;
+
+input [WIDTH-1:0] input_bits;
+output out;
+
+genvar step, i, j;
+generate
+	for (step = 1; step <= WIDTH; step = step * CHUNK) begin : steps
+		localparam PREV = step / CHUNK;
+		localparam DIM = WIDTH / step;
+		for (i = 0; i < DIM; i = i + 1) begin : outer
+			localparam LAST_START = i * CHUNK;
+			for (j = 0; j < CHUNK; j = j + 1) begin : inner
+				wire temp;
+				if (step == 1)
+					assign temp = input_bits[i];
+				else if (j == 0)
+					assign temp = steps[PREV].outer[LAST_START].val;
+				else
+					assign temp
+						= steps[step].outer[i].inner[j-1].temp
+						& steps[PREV].outer[LAST_START + j].val;
+			end
+			wire val;
+			assign val = steps[step].outer[i].inner[CHUNK - 1].temp;
+		end
+	end
+endgenerate
+assign out = steps[WIDTH].outer[0].val;
 endmodule

tests/simple/hierdefparam.v

@@ -1,3 +1,5 @@
+`default_nettype none
+
 module hierdefparam_top(input [7:0] A, output [7:0] Y);
   generate begin:foo
     hierdefparam_a mod_a(.A(A), .Y(Y));

tests/simple/task_func.v

@@ -120,3 +120,22 @@ module task_func_test04(input [7:0] in, output [7:0] out1, out2, out3, out4);
 	assign out3 = test3(in);
 	assign out4 = test4(in);
 endmodule
+
+// -------------------------------------------------------------------
+
+// https://github.com/YosysHQ/yosys/issues/857
+module task_func_test05(data_in,data_out,clk);
+	output reg data_out;
+	input data_in;
+	input clk;
+
+	task myTask;
+		output out;
+		input in;
+		out = in;
+	endtask
+
+	always @(posedge clk) begin
+		myTask(data_out,data_in);
+	end
+endmodule

tests/simple/xfirrtl

@@ -1,6 +1,7 @@
 # This file contains the names of verilog files to exclude from verilog to FIRRTL regression tests due to known failures.
 arraycells.v	inst id[0] of
 dff_different_styles.v
+dff_init.v	Initial value not supported
 generate.v	combinational loop
 hierdefparam.v	inst id[0] of
 i2c_master_tests.v   $adff
@@ -12,7 +13,6 @@ multiplier.v	inst id[0] of
 muxtree.v	drops modules
 omsp_dbg_uart.v	$adff
 operators.v	$pow
-paramods.v	subfield assignment (bits() <= ...)
 partsel.v	drops modules
 process.v	drops modules
 realexpr.v	drops modules

tests/simple_defparam/run-test.sh

@@ -1,21 +0,0 @@
-#!/bin/bash
-
-OPTIND=1
-seed=""    # default to no seed specified
-while getopts "S:" opt
-do
-    case "$opt" in
-	S) arg="${OPTARG#"${OPTARG%%[![:space:]]*}"}" # remove leading space
-	   seed="SEED=$arg" ;;
-    esac
-done
-shift "$((OPTIND-1))"
-
-# check for Icarus Verilog
-if ! which iverilog > /dev/null ; then
-  echo "$0: Error: Icarus Verilog 'iverilog' not found."
-  exit 1
-fi
-
-cp ../simple/*.v .
-exec ${MAKE:-make} -f ../tools/autotest.mk $seed *.v EXTRA_FLAGS="-B \"-defparam\""

tests/tools/autotest.sh

@@ -8,7 +8,7 @@ verbose=false
 keeprunning=false
 makejmode=false
 frontend="verilog"
-backend_opts="-noattr -noexpr"
+backend_opts="-noattr -noexpr -siminit"
 autotb_opts=""
 include_opts=""
 xinclude_opts=""
@@ -28,7 +28,7 @@ if [ ! -f $toolsdir/cmp_tbdata -o $toolsdir/cmp_tbdata.c -nt $toolsdir/cmp_tbdat
 	( set -ex; ${CC:-gcc} -Wall -o $toolsdir/cmp_tbdata $toolsdir/cmp_tbdata.c; ) || exit 1
 fi
 
-while getopts xmGl:wkjvref:s:p:n:S:I:B:-: opt; do
+while getopts xmGl:wkjvref:s:p:n:S:I:-: opt; do
 	case "$opt" in
 		x)
 			use_xsim=true ;;
@@ -65,8 +65,6 @@ while getopts xmGl:wkjvref:s:p:n:S:I:B:-: opt; do
 			include_opts="$include_opts -I $OPTARG"
 			xinclude_opts="$xinclude_opts -i $OPTARG"
 			minclude_opts="$minclude_opts +incdir+$OPTARG" ;;
-        B)
-			backend_opts="$backend_opts $OPTARG" ;;
 		-)
 			case "${OPTARG}" in
 			    xfirrtl)
@@ -84,7 +82,7 @@ while getopts xmGl:wkjvref:s:p:n:S:I:B:-: opt; do
 				;;
 			esac;;
 		*)
-			echo "Usage: $0 [-x|-m] [-G] [-w] [-k] [-j] [-v] [-r] [-e] [-l libs] [-f frontend] [-s script] [-p cmdstring] [-n iters] [-S seed] [-I incdir] [-B backend_opt] [--xfirrtl FIRRTL test exclude file] [--firrtl2verilog command to generate verilog from firrtl] verilog-files\n" >&2
+			echo "Usage: $0 [-x|-m] [-G] [-w] [-k] [-j] [-v] [-r] [-e] [-l libs] [-f frontend] [-s script] [-p cmdstring] [-n iters] [-S seed] [-I incdir] [--xfirrtl FIRRTL test exclude file] [--firrtl2verilog command to generate verilog from firrtl] verilog-files\n" >&2
 			exit 1
 	esac
 done
@@ -183,7 +181,7 @@ do
 			if [ -n "$firrtl2verilog" ]; then
 			    if test -z "$xfirrtl" || ! grep "$fn" "$xfirrtl" ; then
 				"$toolsdir"/../../yosys -b "firrtl" -o ${bn}_ref.fir -f "$frontend $include_opts" -p "prep -nordff; proc; opt; memory; opt; fsm; opt -full -fine; pmuxtree" ${bn}_ref.v
-				$firrtl2verilog -i ${bn}_ref.fir -o ${bn}_ref.fir.v  -X verilog
+				$firrtl2verilog -i ${bn}_ref.fir -o ${bn}_ref.fir.v
 				test_passes -f "$frontend $include_opts" -p "hierarchy; proc; opt; memory; opt; fsm; opt -full -fine" ${bn}_ref.fir.v
 			    fi
 			fi

tests/various/hierarchy.sh

@@ -0,0 +1,59 @@
+#!/usr/bin/env bash
+# Simple test of hierarchy -auto-top.
+
+set -e
+
+echo -n "  TOP first - "
+../../yosys -s - <<- EOY | grep "Automatically selected TOP as design top module"
+  read_verilog << EOV
+    module TOP(a, y);
+      input a;
+      output [31:0] y;
+
+      aoi12 p [31:0] (a, y);
+    endmodule
+
+    module aoi12(a, y);
+      input a;
+      output y;
+      assign y = ~a;
+    endmodule
+  EOV
+  hierarchy -auto-top
+EOY
+
+echo -n "  TOP last - "
+../../yosys -s - <<- EOY | grep "Automatically selected TOP as design top module"
+  read_verilog << EOV
+    module aoi12(a, y);
+      input a;
+      output y;
+      assign y = ~a;
+    endmodule
+
+    module TOP(a, y);
+      input a;
+      output [31:0] y;
+
+      aoi12 foo (a, y);
+    endmodule
+  EOV
+  hierarchy -auto-top
+EOY
+
+echo -n "  no explicit top - "
+../../yosys -s - <<- EOY | grep "Automatically selected noTop as design top module."
+  read_verilog << EOV
+    module aoi12(a, y);
+      input a;
+      output y;
+      assign y = ~a;
+    endmodule
+
+    module noTop(a, y);
+      input a;
+      output [31:0] y;
+    endmodule
+  EOV
+  hierarchy -auto-top
+EOY

tests/various/run-test.sh

@@ -1,6 +1,14 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 for x in *.ys; do
 	echo "Running $x.."
 	../../yosys -ql ${x%.ys}.log $x
 done
+# Run any .sh files in this directory (with the exception of the file - run-test.sh
+shell_tests=$(echo *.sh | sed -e 's/run-test.sh//')
+if [ "$shell_tests" ]; then
+    for s in $shell_tests; do
+        echo "Running $s.."
+        bash $s
+    done
+fi