diff --git a/techlibs/gowin/Makefile.inc b/techlibs/gowin/Makefile.inc new file mode 100644 index 000000000..679d7eff5 --- /dev/null +++ b/techlibs/gowin/Makefile.inc @@ -0,0 +1,6 @@ + +OBJS += techlibs/gowin/synth_gowin.o + +$(eval $(call add_share_file,share/gowin,techlibs/gowin/cells_map.v)) +$(eval $(call add_share_file,share/gowin,techlibs/gowin/cells_sim.v)) + diff --git a/techlibs/gowin/cells_map.v b/techlibs/gowin/cells_map.v new file mode 100644 index 000000000..e1f85effa --- /dev/null +++ b/techlibs/gowin/cells_map.v @@ -0,0 +1,31 @@ +module \$_DFF_N_ (input D, C, output Q); DFFN _TECHMAP_REPLACE_ (.D(D), .Q(Q), .CLK(C)); endmodule +module \$_DFF_P_ (input D, C, output Q); DFF _TECHMAP_REPLACE_ (.D(D), .Q(Q), .CLK(C)); endmodule + +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_ (.F(Y), + .I0(A[0])); + end else + if (WIDTH == 2) begin + LUT2 #(.INIT(LUT)) _TECHMAP_REPLACE_ (.F(Y), + .I0(A[0]), .I1(A[1])); + end else + if (WIDTH == 3) begin + LUT3 #(.INIT(LUT)) _TECHMAP_REPLACE_ (.F(Y), + .I0(A[0]), .I1(A[1]), .I2(A[2])); + end else + if (WIDTH == 4) begin + LUT4 #(.INIT(LUT)) _TECHMAP_REPLACE_ (.F(Y), + .I0(A[0]), .I1(A[1]), .I2(A[2]), .I3(A[3])); + end else begin + wire _TECHMAP_FAIL_ = 1; + end + endgenerate +endmodule diff --git a/techlibs/gowin/cells_sim.v b/techlibs/gowin/cells_sim.v new file mode 100644 index 000000000..3a09c157f --- /dev/null +++ b/techlibs/gowin/cells_sim.v @@ -0,0 +1,51 @@ +module LUT1(output F, input I0); + parameter [1:0] INIT = 0; + assign F = I0 ? INIT[1] : INIT[0]; +endmodule + +module LUT2(output F, input I0, I1); + parameter [3:0] INIT = 0; + wire [ 1: 0] s1 = I1 ? INIT[ 3: 2] : INIT[ 1: 0]; + assign F = I0 ? s1[1] : s1[0]; +endmodule + +module LUT3(output F, input I0, I1, I2); + parameter [7:0] INIT = 0; + wire [ 3: 0] s2 = I2 ? INIT[ 7: 4] : INIT[ 3: 0]; + wire [ 1: 0] s1 = I1 ? s2[ 3: 2] : s2[ 1: 0]; + assign F = I0 ? s1[1] : s1[0]; +endmodule + +module LUT4(output F, input I0, I1, I2, I3); + parameter [15:0] INIT = 0; + wire [ 7: 0] s3 = I3 ? INIT[15: 8] : INIT[ 7: 0]; + wire [ 3: 0] s2 = I2 ? s3[ 7: 4] : s3[ 3: 0]; + wire [ 1: 0] s1 = I1 ? s2[ 3: 2] : s2[ 1: 0]; + assign F = I0 ? s1[1] : s1[0]; +endmodule + +module DFF (output reg Q, input CLK, D); + always @(posedge C) + Q <= D; +endmodule + +module DFFN (output reg Q, input CLK, D); + always @(negedge C) + Q <= D; +endmodule + +module VCC(output V); + assign V = 1; +endmodule + +module GND(output G); + assign G = 0; +endmodule + +module IBUF(output O, input I); + assign O = I; +endmodule + +module OBUF(output O, input I); + assign O = I; +endmodule diff --git a/techlibs/gowin/synth_gowin.cc b/techlibs/gowin/synth_gowin.cc new file mode 100644 index 000000000..129ab8393 --- /dev/null +++ b/techlibs/gowin/synth_gowin.cc @@ -0,0 +1,178 @@ +/* + * yosys -- Yosys Open SYnthesis Suite + * + * Copyright (C) 2012 Clifford Wolf + * + * 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/register.h" +#include "kernel/celltypes.h" +#include "kernel/rtlil.h" +#include "kernel/log.h" + +USING_YOSYS_NAMESPACE +PRIVATE_NAMESPACE_BEGIN + +struct SynthGowinPass : public ScriptPass +{ + SynthGowinPass() : ScriptPass("synth_gowin", "synthesis for Gowin FPGAs") { } + + virtual void help() YS_OVERRIDE + { + // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| + log("\n"); + log(" synth_gowin [options]\n"); + log("\n"); + log("This command runs synthesis for Gowin FPGAs. This work is experimental.\n"); + log("\n"); + log(" -top \n"); + log(" use the specified module as top module (default='top')\n"); + log("\n"); + log(" -vout \n"); + log(" write the design to the specified Verilog netlist file. writing of an\n"); + log(" output file is omitted if this parameter is not specified.\n"); + log("\n"); + log(" -run :\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"); + log(" synonymous to the end of the command list.\n"); + log("\n"); + log(" -retime\n"); + log(" run 'abc' with -dff option\n"); + log("\n"); + log("\n"); + log("The following commands are executed by this synthesis command:\n"); + help_script(); + log("\n"); + } + + string top_opt, vout_file; + bool retime; + + virtual void clear_flags() YS_OVERRIDE + { + top_opt = "-auto-top"; + vout_file = ""; + retime = false; + } + + virtual void execute(std::vector args, RTLIL::Design *design) YS_OVERRIDE + { + string run_from, run_to; + clear_flags(); + + size_t argidx; + for (argidx = 1; argidx < args.size(); argidx++) + { + if (args[argidx] == "-top" && argidx+1 < args.size()) { + top_opt = "-top " + args[++argidx]; + continue; + } + if (args[argidx] == "-vout" && argidx+1 < args.size()) { + vout_file = args[++argidx]; + continue; + } + if (args[argidx] == "-run" && argidx+1 < args.size()) { + size_t pos = args[argidx+1].find(':'); + if (pos == std::string::npos) + break; + run_from = args[++argidx].substr(0, pos); + run_to = args[argidx].substr(pos+1); + continue; + } + if (args[argidx] == "-retime") { + retime = true; + continue; + } + break; + } + extra_args(args, argidx, design); + + if (!design->full_selection()) + log_cmd_error("This comannd only operates on fully selected designs!\n"); + + log_header(design, "Executing SYNTH_GOWIN pass.\n"); + log_push(); + + run_script(design, run_from, run_to); + + log_pop(); + } + + virtual void script() YS_OVERRIDE + { + if (check_label("begin")) + { + run("read_verilog -lib +/gowin/cells_sim.v"); + run(stringf("hierarchy -check %s", help_mode ? "-top " : top_opt.c_str())); + } + + if (check_label("flatten")) + { + run("proc"); + run("flatten"); + run("tribuf -logic"); + run("deminout"); + } + + if (check_label("coarse")) + { + run("synth -run coarse"); + } + + if (check_label("fine")) + { + run("opt -fast -mux_undef -undriven -fine"); + run("memory_map"); + run("opt -undriven -fine"); + run("techmap"); + run("clean -purge"); + run("splitnets -ports"); + run("setundef -undriven -zero"); + if (retime || help_mode) + run("abc -dff", "(only if -retime)"); + } + + if (check_label("map_luts")) + { + run("abc -lut 4"); + run("clean"); + } + + if (check_label("map_cells")) + { + run("techmap -map +/gowin/cells_map.v"); + run("hilomap -hicell VCC V -locell GND G"); + run("iopadmap -inpad IBUF O:I -outpad OBUF I:O"); + run("clean -purge"); + } + + if (check_label("check")) + { + run("hierarchy -check"); + run("stat"); + run("check -noinit"); + } + + if (check_label("vout")) + { + if (!vout_file.empty() || help_mode) + run(stringf("write_verilog -attr2comment -defparam -renameprefix gen %s", + help_mode ? "" : vout_file.c_str())); + } + } +} SynthGowinPass; + +PRIVATE_NAMESPACE_END