From 7f033d3c1f4604d303da237fbc7a38ee503416ad Mon Sep 17 00:00:00 2001
From: KrystalDelusion <krystinedawn@yosyshq.com>
Date: Thu, 7 Jul 2022 11:10:33 +1200
Subject: [PATCH] More tests in memlib/generate.py

Covers most of the todo list, at least functionally.  Some minor issues with not always using hardware features.
---
 tests/memlib/generate.py              | 677 +++++++++++++++++++++++++-
 tests/memlib/memlib_9b1B.txt          |  31 ++
 tests/memlib/memlib_9b1B.v            |  68 +++
 tests/memlib/memlib_block_sp_full.txt |  61 +++
 tests/memlib/memlib_block_sp_full.v   |  82 ++++
 tests/memlib/memlib_clock_sdp.txt     |  76 +++
 tests/memlib/memlib_clock_sdp.v       |  36 ++
 tests/memlib/memlib_lut.txt           |  18 +-
 tests/memlib/memlib_lut.v             |   9 +-
 tests/memlib/memlib_multilut.txt      |  19 +
 tests/memlib/memlib_multilut.v        |  45 ++
 tests/memlib/memlib_wren.txt          |  37 ++
 tests/memlib/memlib_wren.v            |  33 ++
 13 files changed, 1180 insertions(+), 12 deletions(-)
 create mode 100644 tests/memlib/memlib_9b1B.txt
 create mode 100644 tests/memlib/memlib_9b1B.v
 create mode 100644 tests/memlib/memlib_block_sp_full.txt
 create mode 100644 tests/memlib/memlib_block_sp_full.v
 create mode 100644 tests/memlib/memlib_clock_sdp.txt
 create mode 100644 tests/memlib/memlib_clock_sdp.v
 create mode 100644 tests/memlib/memlib_multilut.txt
 create mode 100644 tests/memlib/memlib_multilut.v
 create mode 100644 tests/memlib/memlib_wren.txt
 create mode 100644 tests/memlib/memlib_wren.v

diff --git a/tests/memlib/generate.py b/tests/memlib/generate.py
index 341486584..f40210501 100644
--- a/tests/memlib/generate.py
+++ b/tests/memlib/generate.py
@@ -1,13 +1,6 @@
 # TODO:
 
-# - memory initialization
-# - clock polarity combinations
-# - CE/srst/rdwr/be interactions
 # - priority logic
-# - byte enables, wrbe_separate
-# - duplication for read ports
-# - abits/dbits determination
-# - mixed width
 # - swizzles for weird width progressions
 
 
@@ -22,6 +15,7 @@ class Test:
 TESTS = []
 
 ### basic sanity tests
+# Asynchronous-read RAM
 
 ASYNC = """
 module top(clk, ra, wa, rd, wd, we);
@@ -56,6 +50,7 @@ TESTS += [
     Test("async_small_block", ASYNC_SMALL, ["block_tdp"], [], {"RAM_BLOCK_TDP": 0}),
 ]
 
+# Synchronous SDP read first
 SYNC = """
 module top(clk, ra, wa, rd, wd, we);
 
@@ -95,6 +90,261 @@ TESTS += [
     Test("sync_small_block_attr", SYNC_SMALL_BLOCK, ["lut", "block_tdp"], [], {"RAM_BLOCK_TDP": 1}),
 ]
 
+### initialization values testing
+LUT_INIT = """
+module top(clk, ra, wa, rd, wd, we);
+
+localparam ABITS = {abits};
+localparam DBITS = {dbits};
+
+input wire clk;
+input wire we;
+input wire [ABITS-1:0] ra, wa;
+input wire [DBITS-1:0] wd;
+output wire [DBITS-1:0] rd;
+
+reg [DBITS-1:0] mem [0:2**ABITS-1];
+
+integer i;
+initial
+	for (i = 0; i < 2**ABITS-1; i = i + 1)
+		mem[i] = {ival};
+
+always @(posedge clk)
+    if (we)
+        mem[wa] <= wd;
+
+assign rd = mem[ra];
+
+endmodule
+"""
+
+INIT_LUT_ZEROS = LUT_INIT.format(abits=4, dbits=4, ival=0);
+INIT_LUT_VAL = LUT_INIT.format(abits=4, dbits=4, ival=5);
+INIT_LUT_VAL2 = LUT_INIT.format(abits=6, dbits=6, ival="6'h12");
+INIT_LUT_X = LUT_INIT.format(abits=4, dbits=4, ival="4'hx")
+
+TESTS += [
+	Test("init_lut_zeros_zero", INIT_LUT_ZEROS, ["lut"], ["INIT_ZERO"], {"RAM_LUT":1}),
+	Test("init_lut_zeros_any", INIT_LUT_ZEROS, ["lut"], ["INIT_ANY"], {"RAM_LUT":1}),
+	Test("init_lut_val_zero", INIT_LUT_VAL, ["lut"], ["INIT_ZERO"], {"RAM_LUT":0}), #CHECK: no emulation?
+	Test("init_lut_val_any", INIT_LUT_VAL, ["lut"], ["INIT_ANY"], {"RAM_LUT":1}),
+	Test("init_lut_val_no_undef", INIT_LUT_VAL, ["lut"], ["INIT_NO_UNDEF"], {"RAM_LUT":1}),
+	Test("init_lut_val2_any", INIT_LUT_VAL2, ["lut"], ["INIT_ANY"], {"RAM_LUT":8}),
+	Test("init_lut_val2_no_undef", INIT_LUT_VAL2, ["lut"], ["INIT_NO_UNDEF"], {"RAM_LUT":8}),
+	Test("init_lut_x_none", INIT_LUT_X, ["lut"], ["INIT_NONE"], {"RAM_LUT":1}),
+	Test("init_lut_x_zero", INIT_LUT_X, ["lut"], ["INIT_ZERO"], {"RAM_LUT":1}),
+	Test("init_lut_x_any", INIT_LUT_X, ["lut"], ["INIT_ANY"], {"RAM_LUT":1}),
+	Test("init_lut_x_no_undef", INIT_LUT_X, ["lut"], ["INIT_NO_UNDEF"], {"RAM_LUT":1}),
+]
+
+### width testing 9-bit-per-byte
+RAM_9b1B = """
+module top(clk, ra, wa, rd, wd, we);
+
+localparam ABITS = {abits};
+localparam DBITS = {dbits};
+
+input wire clk;
+input wire we;
+input wire [ABITS-1:0] ra, wa;
+input wire [DBITS-1:0] wd;
+output reg [DBITS-1:0] rd;
+
+reg [DBITS-1:0] mem [0:2**ABITS-1];
+
+always @(posedge clk)
+    if (we)
+        mem[wa] <= wd;
+
+always @(posedge clk)
+    rd <= mem[ra];
+
+endmodule
+"""
+
+RAM_18b2B = RAM_9b1B.format(abits=3, dbits=18);
+RAM_9b1B = RAM_9b1B.format(abits=4, dbits=9);
+RAM_4b1B = RAM_9b1B.format(abits=5, dbits=4);
+RAM_2b1B = RAM_9b1B.format(abits=6, dbits=2);
+RAM_1b1B = RAM_9b1B.format(abits=7, dbits=1);
+
+TESTS += [
+	Test("ram_18b2B", RAM_18b2B, ["9b1B"], [], {"RAM_9b1B":1}),
+	Test("ram_9b1B", RAM_9b1B, ["9b1B"], [], {"RAM_9b1B":1}),
+	Test("ram_4b1B", RAM_4b1B, ["9b1B"], [], {"RAM_9b1B":1}),
+	Test("ram_2b1B", RAM_2b1B, ["9b1B"], [], {"RAM_9b1B":1}),
+	Test("ram_1b1B", RAM_1b1B, ["9b1B"], [], {"RAM_9b1B":1}),
+]
+
+### initializing 9-bits-per-byte
+RAM_9b1B_init = """
+module top(clk, ra, wa, rd, wd, we);
+
+localparam ABITS = {abits};
+localparam DBITS = {dbits};
+
+input wire clk;
+input wire we;
+input wire [ABITS-1:0] ra, wa;
+input wire [DBITS-1:0] wd;
+output reg [DBITS-1:0] rd;
+
+reg [DBITS-1:0] mem [0:2**ABITS-1];
+
+integer i;
+initial
+	for (i = 0; i < 2**ABITS-1; i = i + 1)
+		mem[i] = {ival};
+
+always @(posedge clk)
+    if (we)
+        mem[wa] <= wd;
+
+always @(posedge clk)
+    rd <= mem[ra];
+
+endmodule
+"""
+
+INIT_9b1B_ZEROS = RAM_9b1B_init.format(abits=4, dbits=9, ival=0);
+INIT_9b1B_VAL = RAM_9b1B_init.format(abits=4, dbits=9, ival=275);
+INIT_13b2B_VAL = RAM_9b1B_init.format(abits=3, dbits=13, ival="13'h01f3")
+INIT_18b2B_VAL = RAM_9b1B_init.format(abits=4, dbits=18, ival="18'h1f39a");
+INIT_4b1B_X = RAM_9b1B_init.format(abits=5, dbits=4, ival="4'hx")
+
+TESTS += [
+	Test("init_9b1B_zeros_zero", INIT_9b1B_ZEROS, ["9b1B"], ["INIT_ZERO"], {"RAM_9b1B":1}),
+	Test("init_9b1B_zeros_any", INIT_9b1B_ZEROS, ["9b1B"], ["INIT_ANY"], {"RAM_9b1B":1}),
+	Test("init_9b1B_val_zero", INIT_9b1B_VAL, ["9b1B"], ["INIT_ZERO"], {"RAM_9b1B":0}), #CHECK: no emulation?
+	Test("init_9b1B_val_any", INIT_9b1B_VAL, ["9b1B"], ["INIT_ANY"], {"RAM_9b1B":1}),
+	Test("init_9b1B_val_no_undef", INIT_9b1B_VAL, ["9b1B"], ["INIT_NO_UNDEF"], {"RAM_9b1B":1}),
+	Test("init_13b2B_val_any", INIT_13b2B_VAL, ["9b1B"], ["INIT_ANY"], {"RAM_9b1B":1}),
+	Test("init_18b2B_val_any", INIT_18b2B_VAL, ["9b1B"], ["INIT_ANY"], {"RAM_9b1B":2}),
+	Test("init_18b2B_val_no_undef", INIT_18b2B_VAL, ["9b1B"], ["INIT_NO_UNDEF"], {"RAM_9b1B":2}),
+	Test("init_4b1B_x_none", INIT_4b1B_X, ["9b1B"], ["INIT_NONE"], {"RAM_9b1B":1}),
+	Test("init_4b1B_x_zero", INIT_4b1B_X, ["9b1B"], ["INIT_ZERO"], {"RAM_9b1B":1}),
+	Test("init_4b1B_x_any", INIT_4b1B_X, ["9b1B"], ["INIT_ANY"], {"RAM_9b1B":1}),
+	Test("init_4b1B_x_no_undef", INIT_4b1B_X, ["9b1B"], ["INIT_NO_UNDEF"], {"RAM_9b1B":1}),
+]
+
+### Clock polarity combinations
+# I'm not entirely convinced auto-test is correctly testing clock edging
+#  but they do at least all gen/synth
+SYNCCLOCK = """
+module top(clk, ra, wa, rd, wd, we);
+
+localparam ABITS = {abits};
+localparam DBITS = 8;
+
+input wire clk;
+input wire we;
+input wire [ABITS-1:0] ra, wa;
+input wire [DBITS-1:0] wd;
+output reg [DBITS-1:0] rd;
+
+reg [DBITS-1:0] mem [0:2**ABITS-1];
+
+always @(posedge clk)
+    if (we)
+        mem[wa] <= wd;
+
+always @(posedge clk)
+    rd <= mem[ra];
+
+endmodule
+"""
+for (abits, cnt, wclk, rclk, shared) in [
+	(4,   1, "ANY","ANY", False),
+	(4,   1, "ANY","NEG", False),
+	(4,   1, "ANY","POS", False),
+	(4,   1, "NEG","ANY", False),
+	(4,   1, "NEG","POS", False),
+	(4,   1, "NEG","NEG", False),
+	(4,   1, "POS","ANY", False),
+	(4,   1, "POS","NEG", False),
+	(4,   1, "POS","POS", False),
+	(4,   1, "ANY","ANY", True),
+	(4,   0, "NEG","POS", True), # FF mapping
+	(4,   1, "NEG","NEG", True),
+	(4,   0, "POS","NEG", True), # FF mapping
+	(4,   1, "POS","POS", True),
+	# cannot combine "ANY" with "POS|NEG" when using shared clock
+]:
+	name = f"clock_a{abits}_w{wclk}r{rclk}s{shared}"
+	defs = ["WCLK_" + wclk, "RCLK_" + rclk]
+	if (shared):
+		defs.append("SHARED_CLK")
+	TESTS.append(Test(
+		name, SYNCCLOCK.format(abits=abits),
+		["clock_sdp"], defs, {"RAM_CLOCK_SDP": cnt}
+	))
+
+### mixed width testing
+# Wide write port
+MIXED_WRITE = """
+module top(clk, ra, wa, rd, wd, we);
+
+localparam WABITS = {wabits};
+localparam WDBITS = {wdbits};
+
+localparam RABITS = {rabits};
+localparam RDBITS = {rdbits};
+
+input wire clk;
+input wire we;
+input wire [WABITS-1:0] wa;
+input wire [WDBITS-1:0] wd;
+input wire [RABITS-1:0] ra;
+output reg [RDBITS-1:0] rd;
+
+localparam DEPTH = (2**WABITS);
+
+localparam OFFSET = RABITS-WABITS;
+
+(* syn_ramstyle = "block_ram" *)
+reg [WDBITS-1:0] mem [0:DEPTH-1];
+
+always @(posedge clk)
+	if (we)
+		mem[wa] <= wd;
+
+if (OFFSET > 0) begin
+	reg [WDBITS-1:0] mem_read;
+	reg [OFFSET-1:0] subaddr_r;
+	always @(posedge clk) begin
+		mem_read <= mem[ra[RABITS-1:OFFSET]];
+		subaddr_r <= ra[OFFSET-1:0];
+	end
+
+	always @(mem_read, subaddr_r)
+		rd <= mem_read[subaddr_r*RDBITS+:RDBITS];
+end 
+else 
+begin
+	always @(posedge clk)
+		case (OFFSET)
+		0:  rd <= mem[ra];
+		-1: rd <= {{ mem[ra], mem[ra+1] }};
+		endcase
+end
+endmodule
+"""
+
+UNMIXED = MIXED_WRITE.format(wabits=4, wdbits=9, rabits=4, rdbits=9)
+MIXED_9_18 = MIXED_WRITE.format(wabits=5, wdbits=9, rabits=4, rdbits=18)
+MIXED_18_9 = MIXED_WRITE.format(wabits=3, wdbits=18, rabits=4, rdbits=9)
+MIXED_36_9 = MIXED_WRITE.format(wabits=3, wdbits=36, rabits=5, rdbits=9)
+MIXED_4_2 = MIXED_WRITE.format(wabits=5, wdbits=4, rabits=6, rdbits=2);
+
+TESTS += [
+	Test("unmixed", UNMIXED, ["9b1B"], [], {"RAM_9b1B":1}),
+	Test("mixed_9_18", MIXED_9_18, ["9b1B"], [], {"RAM_9b1B":4}), #CHECK: only using half the memory
+	Test("mixed_18_9", MIXED_18_9, ["9b1B"], [], {"RAM_9b1B":1}),
+	Test("mixed_36_9", MIXED_36_9, ["9b1B"], [], {"RAM_9b1B":2}),
+	Test("mixed_4_2", MIXED_4_2, ["9b1B"], [], {"RAM_9b1B":1}),
+]
+
 ### basic TDP test
 
 TDP = """
@@ -131,7 +381,7 @@ TESTS += [
 ]
 
 # shared clock
-
+# Synchronous SDP with clock domain crossing
 SYNC_2CLK = """
 module top(rclk, wclk, ra, wa, rd, wd, we);
 
@@ -163,7 +413,7 @@ TESTS += [
 ]
 
 # inter-port transparency
-
+# Synchronous SDP with write-first behaviour
 SYNC_TRANS = """
 module top(clk, ra, wa, rd, wd, we);
 
@@ -201,7 +451,7 @@ TESTS += [
 ]
 
 # rdwr checks
-
+# Synchronous single-port RAM with mutually exclusive read/write
 SP_NO_CHANGE = """
 module top(clk, addr, rd, wd, we);
 
@@ -247,6 +497,7 @@ end
 endmodule
 """
 
+# Synchronous single-port RAM with write-first behaviour
 SP_NEW = """
 module top(clk, addr, rd, wd, we);
 
@@ -295,6 +546,7 @@ end
 endmodule
 """
 
+# Synchronous single-port RAM with read-first behaviour
 SP_OLD = """
 module top(clk, addr, rd, wd, we);
 
@@ -373,6 +625,7 @@ TESTS += [
         Test("sp_old_auto_be", SP_OLD_BE, ["block_sp"], ["RDWR_NO_CHANGE", "RDWR_OLD", "RDWR_NEW"], {"RAM_BLOCK_SP": (1, {"OPTION_RDWR": "OLD"})}),
 ]
 
+# Synchronous read port with initial value
 SP_INIT = """
 module top(clk, addr, rd, wd, we, re);
 
@@ -418,6 +671,7 @@ TESTS += [
     Test("sp_init_v_any_re", SP_INIT_V, ["block_sp"], ["RDINIT_ANY", "RDEN", "RDWR_OLD"], {"RAM_BLOCK_SP": 1}),
 ]
 
+# Synchronous read port with asynchronous reset
 SP_ARST = """
 module top(clk, addr, rd, wd, we, re, ar);
 
@@ -488,6 +742,7 @@ TESTS += [
     Test("sp_arst_n_init_re", SP_ARST_N, ["block_sp"], ["RDINIT_ANY", "RDARST_INIT", "RDEN", "RDWR_OLD"], {"RAM_BLOCK_SP": 1}),
 ]
 
+# Synchronous read port with synchronous reset (reset priority over enable)
 SP_SRST = """
 module top(clk, addr, rd, wd, we, re, sr);
 
@@ -515,6 +770,7 @@ end
 endmodule
 """
 
+# Synchronous read port with synchronous reet (enable priority over reset)
 SP_SRST_G = """
 module top(clk, addr, rd, wd, we, re, sr);
 
@@ -602,6 +858,180 @@ TESTS += [
     Test("sp_srst_gv_init_re", SP_SRST_GV, ["block_sp"], ["RDINIT_ANY", "RDSRST_INIT", "RDEN", "RDWR_OLD"], {"RAM_BLOCK_SP": 1}),
 ]
 
+# Byte enables, wrbe_separate
+SYNC_ENABLE = """
+module top(clk, rwa, rd, wd, we);
+
+localparam ABITS = {abits};
+localparam DBITS = {dbits};
+
+input wire clk;
+input wire we;
+input wire [ABITS-1:0] rwa;
+input wire [DBITS-1:0] wd;
+output reg [DBITS-1:0] rd;
+
+reg [DBITS-1:0] mem [0:2**ABITS-1];
+
+always @(posedge clk) begin
+	if (we)
+		mem[rwa] <= wd;
+	else
+		rd <= mem[rwa];
+end
+
+endmodule
+"""
+
+for (abits, dbits, sep, defs, cells) in [
+	(4, 4, False,	["NO_BYTE"],	{"RAM_WREN": 1}),
+	(5, 4, False,	["NO_BYTE"],	{"RAM_WREN": 2}),
+	(6, 4, False,	["NO_BYTE"],	{"RAM_WREN": 4}),
+	# (4, 4, True,	["NO_BYTE"],	{"RAM_WREN": 1}), # should throw an error
+	(3, 8, False,	["NO_BYTE"],	{"RAM_WREN": 2}), # needs two write ports
+	(4, 8, False,	["NO_BYTE"],	{"RAM_WREN": 2}),
+	(4, 4, False,	["W4_B4"],	{"RAM_WREN": 1}),
+	(4, 8, True,	["W4_B4"],	{"RAM_WREN": 2}),
+	(4, 8, False,	["W8_B4"],	{"RAM_WREN": 1}),
+	(4, 8, True,	["W8_B4"],	{"RAM_WREN": 1}),
+	(4, 8, False,	["W8_B8"],	{"RAM_WREN": 1}),
+	(4, 8, True,	["W8_B8"],	{"RAM_WREN": 1}),
+
+]:
+	name = f"wren_a{abits}d{dbits}_{defs[0]}"
+	if (sep):
+		defs.append("WRBE_SEPARATE")
+		name += "_separate"
+
+	TESTS.append(Test(
+		name, SYNC_ENABLE.format(abits=abits, dbits=dbits),
+		["wren"], defs, cells
+	))
+
+# Write port with byte enables
+ENABLES = """
+module top(clk, we, be, rwa, wd, rd);
+
+localparam ABITS = {abits};
+localparam WBITS = {wbits};
+localparam WORDS = {words};
+
+input wire clk;
+input wire we;
+input wire [WORDS-1:0] be;
+input wire [ABITS-1:0] rwa;
+input wire [(WBITS*WORDS)-1:0] wd;
+output reg [(WBITS*WORDS)-1:0] rd;
+
+reg [(WBITS*WORDS)-1:0] mem [0:2**ABITS-1];
+
+integer i;
+always @(posedge clk)
+	for (i=0; i<WORDS; i=i+1)
+		if (we && be[i])
+			mem[rwa][i*WBITS+:WBITS] <= wd[i*WBITS+:WBITS];
+
+always @(posedge clk)
+	if (!we)
+		rd <= mem[rwa];
+
+endmodule
+"""
+
+for (abits, wbits, words, defs, cells) in [
+	(4, 2, 8,	["W16_B4"],	{"RAM_WREN": 2}),
+	(4, 4, 4,	["W16_B4"],	{"RAM_WREN": 1}),
+	(5, 4, 2,	["W16_B4"],	{"RAM_WREN": 1}),
+	(5, 4, 4,	["W16_B4"],	{"RAM_WREN": 2}),
+	(4, 8, 2,	["W16_B4"],	{"RAM_WREN": 1}),
+	(5, 8, 1,	["W16_B4"],	{"RAM_WREN": 1}),
+	(5, 8, 2,	["W16_B4"],	{"RAM_WREN": 2}),
+	(4,16, 1,	["W16_B4"],	{"RAM_WREN": 1}),
+	(4, 4, 2,	["W8_B8"],	{"RAM_WREN": 2}),
+	(4, 4, 1,	["W8_B8"],	{"RAM_WREN": 1}),
+	(4, 8, 2,	["W8_B8"],	{"RAM_WREN": 2}),
+	(3, 8, 2,	["W8_B8"],	{"RAM_WREN": 2}),
+	(4, 4, 2,	["W8_B4"],	{"RAM_WREN": 1}),
+	(4, 2, 4,	["W8_B4"],	{"RAM_WREN": 2}),
+	(4, 4, 4,	["W8_B4"],	{"RAM_WREN": 2}),
+	(4, 4, 4,	["W4_B4"],	{"RAM_WREN": 4}),
+	(4, 4, 5,	["W4_B4"],	{"RAM_WREN": 5}),
+
+]:
+	name = f"wren_a{abits}d{wbits}w{words}_{defs[0]}"
+	TESTS.append(Test(
+		name, ENABLES.format(abits=abits, wbits=wbits, words=words),
+		["wren"], defs, cells
+	))
+
+	defs.append("WRBE_SEPARATE")
+	name += "_separate"
+	TESTS.append(Test(
+		name, ENABLES.format(abits=abits, wbits=wbits, words=words),
+		["wren"], defs, cells
+	))
+	
+# abits/dbits determination (aka general geometry picking)
+GEOMETRIC = """
+module top(clk, rwa, rd, wd, we);
+
+localparam ABITS = {abits};
+localparam DBITS = {dbits};
+
+input wire clk;
+input wire we;
+input wire [ABITS-1:0] rwa;
+input wire [DBITS-1:0] wd;
+output reg [DBITS-1:0] rd;
+
+(* ram_style="block" *)
+reg [DBITS-1:0] mem [0:2**ABITS-1];
+
+always @(posedge clk)
+	if (we)
+		mem[rwa] <= wd;
+	else
+		rd <= mem[rwa];	
+
+endmodule
+"""
+
+for (abits,dbits,	libs,		defs,		cells) in [
+	# W64_B8 gives 16 * 64 = 1024 bits of memory with up to 8x8b rw ports
+	(  4, 64,	["wren"],	["W64_B8"],	{"RAM_WREN": 1}),
+	(  5, 32,	["wren"],	["W64_B8"],	{"RAM_WREN": 1}),
+	(  5, 64,	["wren"],	["W64_B8"],	{"RAM_WREN": 2}),
+	(  6, 16,	["wren"],	["W64_B8"],	{"RAM_WREN": 1}),
+	(  6, 30, 	["wren"], 	["W64_B8"], 	{"RAM_WREN": 2}),
+	(  6, 64,	["wren"],	["W64_B8"],	{"RAM_WREN": 4}),
+	(  7,  4,	["wren"],	["W64_B8"],	{"RAM_WREN": 1}),
+	(  7,  6, 	["wren"], 	["W64_B8"], 	{"RAM_WREN": 1}),
+	(  7,  8,	["wren"],	["W64_B8"],	{"RAM_WREN": 1}),
+	(  7, 17, 	["wren"], 	["W64_B8"], 	{"RAM_WREN": 3}),
+	(  8,  4,	["wren"],	["W64_B8"],	{"RAM_WREN": 2}),
+	(  8,  6, 	["wren"], 	["W64_B8"], 	{"RAM_WREN": 2}),
+	(  9,  4,	["wren"],	["W64_B8"],	{"RAM_WREN": 4}),
+	(  9,  8,	["wren"],	["W64_B8"],	{"RAM_WREN": 4}),
+	(  9,  5, 	["wren"], 	["W64_B8"], 	{"RAM_WREN": 4}),
+	(  9,  6, 	["wren"], 	["W64_B8"], 	{"RAM_WREN": 4}),
+	# 9b1B gives 128 bits of memory with 1 2 or 4 bit read and write ports
+	#	or   144 bits with 9 or 18 bit read and write ports
+	(  3, 18, 	["9b1B"], 	["INIT_NONE"], 	{"RAM_9b1B": 1}),
+	(  4,  4, 	["9b1B"], 	["INIT_NONE"], 	{"RAM_9b1B": 1}),
+	(  4, 18, 	["9b1B"], 	["INIT_NONE"], 	{"RAM_9b1B": 2}),
+	(  5, 32, 	["9b1B"], 	["INIT_NONE"], 	{"RAM_9b1B": 8}),
+	(  6,  4, 	["9b1B"], 	["INIT_NONE"], 	{"RAM_9b1B": 2}),
+	(  7, 11, 	["9b1B"], 	["INIT_NONE"], 	{"RAM_9b1B": 11}),
+	(  7, 18, 	["9b1B"], 	["INIT_NONE"], 	{"RAM_9b1B": 16}),
+	( 11,  1, 	["9b1B"], 	["INIT_NONE"], 	{"RAM_9b1B": 16}),
+]:
+	name = f"geom_a{abits}d{dbits}_{libs[0]}"
+	TESTS.append(Test(
+		name, GEOMETRIC.format(abits=abits, dbits=dbits),
+		libs, defs, cells
+	))
+
+# Mixed width testing
 WIDE_SDP = """
 module top(rclk, ra, rd, re, rr, wclk, wa, wd, we);
 
@@ -857,6 +1287,233 @@ for (aw, rw, ww, bw, cntww, cntwr) in [
         {"RAM_WIDE_WRITE": cntww}
     ))
 
+# Multiple read ports
+# 1rw port plus 3 (or 7) r ports
+QUAD_PORT = """
+module top(clk, rwa, r0a, r1a, r2a, rd, r0d, r1d, r2d, wd, we);
+
+localparam ABITS = {abits};
+localparam DBITS = {dbits};
+
+input wire clk;
+input wire we;
+input wire [ABITS-1:0] rwa;
+input wire [ABITS-1:0] r0a;
+input wire [ABITS-1:0] r1a;
+input wire [ABITS-1:0] r2a;
+input wire [DBITS-1:0] wd;
+output wire [DBITS-1:0] rd;
+output wire [DBITS-1:0] r0d;
+output wire [DBITS-1:0] r1d;
+output wire [DBITS-1:0] r2d;
+
+reg [DBITS-1:0] mem [0:2**ABITS-1];
+
+always @(posedge clk)
+    if (we)
+        mem[rwa] <= wd;
+
+assign rd = mem[rwa];
+assign r0d = mem[r0a];
+assign r1d = mem[r1a];
+assign r2d = mem[r2a];
+
+endmodule
+"""
+
+for (abits, dbits, cnt) in [
+    (2, 2, 1),
+    (4, 2, 1),
+    (5, 2, 2),
+    (4, 4, 2),
+    (6, 2, 4),
+    (4, 8, 4),
+]:
+    TESTS.append(Test(
+        f"quad_port_a{abits}d{dbits}",
+        QUAD_PORT.format(abits=abits, dbits=dbits),
+        ["multilut"], ["PORTS_QUAD"],
+        {"LUT_MULTI": cnt}
+    ))
+
+# Wide asynchronous read port
+WIDE_READ = """
+module top(clk, we, rwa, wd, rd);
+
+localparam ABITS = {abits};
+localparam WBITS = {wbits};
+localparam RWORDS = {rwords};
+
+input wire clk;
+input wire we;
+input wire [ABITS-1:0] rwa;
+input wire [WBITS-1:0] wd;
+output wire [(WBITS*RWORDS)-1:0] rd;
+
+reg [WBITS-1:0] mem [0:2**ABITS-1];
+
+always @(posedge clk)
+	if (we)
+		mem[rwa] <= wd;
+
+genvar i;
+generate
+	for (i = 0; i < RWORDS; i = i + 1)
+		assign rd[i*WBITS+:WBITS] = mem[rwa + i];
+endgenerate
+
+endmodule
+"""
+
+for (abits, wbits, rwords, cntquad, cntoct) in [
+	(4, 2, 1, 1, 1),
+	(4, 2, 2, 1, 1),
+	(4, 2, 3, 1, 1),
+	(4, 2, 4, 1, 1),
+	(4, 2, 5, 2, 1),
+	(4, 2, 6, 2, 1),
+	(4, 2, 7, 2, 1), # Write port needs to be duplicated, so only 3 extra read 
+	(4, 2, 8, 3, 1), # ports per quad port LUT (i.e. 7 ports in 2, 8 ports in 3)
+	(4, 2, 9, 3, 2),
+	(4, 4, 1, 2, 2),
+	(4, 4, 4, 2, 2),
+	(4, 4, 6, 4, 2),
+	(4, 4, 9, 6, 4),
+	(5, 2, 1, 2, 2),
+	(5, 2, 4, 2, 2),
+	(5, 2, 9, 6, 4),
+]:
+	TESTS.append(Test(
+		f"wide_quad_a{abits}w{wbits}r{rwords}",
+		WIDE_READ.format(abits=abits, wbits=wbits, rwords=rwords),
+		["multilut"], ["PORTS_QUAD"],
+		{"LUT_MULTI": cntquad}
+	))
+	TESTS.append(Test(
+		f"wide_oct_a{abits}w{wbits}r{rwords}",
+		WIDE_READ.format(abits=abits, wbits=wbits, rwords=rwords),
+		["multilut"], ["PORTS_OCT"],
+		{"LUT_MULTI": cntoct}
+	))
+
+# signal priorities & pattern testing
+PRIORITY = """
+module top(clk, clken, wren, wben, rden, rst, addr, wdata, rdata);
+
+localparam ABITS = {abits};
+localparam WBITS = {wbits};
+localparam WORDS = {words};
+
+localparam BITS = WBITS * WORDS;
+
+input wire clk, clken;
+input wire wren, rden, rst;
+input wire [WORDS-1:0] wben;
+input wire [ABITS-1:0] addr;
+input wire [BITS-1:0] wdata;
+output reg [BITS-1:0] rdata;
+
+reg [BITS-1:0] mem [0:2**ABITS-1];
+
+integer i;
+always @(posedge clk) begin
+{code}
+end
+endmodule
+"""
+#reset_gate in ["ungated", "rst", "rden && rst"]
+#clk_en in [True, False]
+#rdwr in ["nc", "old", "new", "undef", "newdef"]
+
+for (testname, 		reset_gate, 	rdwr,  clk_en, add_logic) in [
+	("no_reset", 	"", 		"old", False, 	0),
+	("gclken", 	"rst", 		"old", False, 	0),
+	("ungated", 	"ungated", 	"old", False, 	1), # muxes wren with rst
+	("gclken_ce", 	"rst", 		"old", True, 	3), # AND to simulate CLK_EN
+	("grden", 	"rden && rst", 	"old", False, 	1), # selects _clken, simulates _rden
+	("grden_ce", 	"rden && rst", 	"old", True, 	4), # both of the above
+	("exclwr",	"", 		"nc",  False, 	2), # selects new_only and simulates
+	("excl_rst", 	"rst", 		"nc",  False, 	3), # as above, extra gate for rst
+	("transwr",	"", 		"new", False, 	0),
+	("trans_rst",	"rst", 		"new", False, 	0),
+]:
+	write = "if (wren) \n\t\tmem[addr] <= wdata;"
+
+	if rdwr == "new":
+		read = """if (rden) 
+		if (wren)
+			rdata <= wdata;
+		else
+			rdata <= mem[addr];"""
+	else:
+		read = "if (rden) \n\t\trdata <= mem[addr];"
+
+	if "rst" in reset_gate:
+		read = f"if ({reset_gate})\n\t\trdata <= 0; \n\telse {read}"
+
+	if reset_gate == "ungated":
+		outer = "if (rst)\n\trdata <= 0;\nelse "
+	else:
+		outer = ""
+
+	if clk_en:
+		outer = f"{outer}if (clken) "
+
+	code = f"""{outer}begin
+	{write}
+	{"else " if rdwr == "nc" else ""}{read}
+end"""
+
+	TESTS.append(Test(
+		testname, PRIORITY.format(code=code, abits=4, wbits=8, words=2),
+		["block_sp_full"], ["USE_SRST"], 
+		{"RAM_BLOCK_SP": 1, "$*": add_logic}
+	))
+
+for (testname, 			reset_gate, 	defs, 		rdwr,  add_logic) in [
+	("wr_byte",		"", 	["USE_SRST_BLOCKING"],	"old", 0),
+	("trans_byte",		"", 	["USE_SRST_BLOCKING"],	"new", 0),
+	("wr_rst_byte",		"rst", 	["USE_SRST"],		"old", 2), # expected mux to emulate blocking
+	("rst_wr_byte",		"rst", 	["USE_SRST_BLOCKING"],	"old", 2), # should use hardware blocking, doesn't
+	("rdenrst_wr_byte", 	"rden && rst", ["USE_SRST"],	"old", 3),
+]:
+	wordsloop = "for (i=0; i<WORDS; i=i+1)"
+	if rdwr == "old":
+		read_write = f"""if (rden)
+		rdata = mem[addr];
+	{wordsloop}
+		if (wben[i])
+			mem[addr][i] <= wdata[i];"""
+	else:
+		read_write = f"""{wordsloop}
+		if (wben[i]) begin
+			mem[addr][i] <= wdata[i];
+			rdata[i] <= wdata[i];
+		end else
+			rdata[i] <= mem[addr][i];"""
+
+	if "rst" in reset_gate:
+		reset_rw = f"""if ({reset_gate})
+		rdata <= 0;
+else begin
+	{read_write}
+end"""
+	else:
+		reset_rw = read_write
+
+	if reset_gate == "ungated":
+		outer = "if (rst)\n\trdata <= 0;\nelse "
+	else:
+		outer = ""
+
+	code = f"{outer}\n{reset_rw}"
+
+	TESTS.append(Test(
+		testname, PRIORITY.format(code=code, abits=4, wbits=1, words=2),
+		["block_sp_full"], defs, 
+		{"RAM_BLOCK_SP": 1, "$*": add_logic}
+	))
+
 with open("run-test.mk", "w") as mf:
     mf.write("ifneq ($(strip $(SEED)),)\n")
     mf.write("SEEDOPT=-S$(SEED)\n")
diff --git a/tests/memlib/memlib_9b1B.txt b/tests/memlib/memlib_9b1B.txt
new file mode 100644
index 000000000..4917aaf8b
--- /dev/null
+++ b/tests/memlib/memlib_9b1B.txt
@@ -0,0 +1,31 @@
+ram block \RAM_9b1B {
+	cost 64;
+	abits 7;
+	widths 1 2 4 9 18 per_port;
+	byte 9;
+	
+	ifdef INIT_NONE {
+		option "INIT" "NONE" {
+			init none;
+		}
+	} else ifdef INIT_ZERO {
+		option "INIT" "ZERO" {
+			init zero;
+		}
+	} else ifdef INIT_NO_UNDEF {
+		option "INIT" "NO_UNDEF" {
+			init no_undef;
+		}
+	} else ifdef INIT_ANY {
+		option "INIT" "ANY" {
+			init any;
+		}
+	}
+
+	port sw "W" {
+		clock anyedge;
+	}
+	port sr "R" {
+		clock anyedge;
+	}
+}
diff --git a/tests/memlib/memlib_9b1B.v b/tests/memlib/memlib_9b1B.v
new file mode 100644
index 000000000..55545ebd4
--- /dev/null
+++ b/tests/memlib/memlib_9b1B.v
@@ -0,0 +1,68 @@
+module RAM_9b1B (
+	input PORT_R_CLK,
+	input [6:0] PORT_R_ADDR,
+	output reg [PORT_R_WIDTH-1:0] PORT_R_RD_DATA,
+	input PORT_W_CLK,
+	input [PORT_W_WR_EN_WIDTH-1:0] PORT_W_WR_EN,
+	input [6:0] PORT_W_ADDR,
+	input [PORT_W_WIDTH-1:0] PORT_W_WR_DATA
+);
+
+parameter INIT = 0;
+parameter OPTION_INIT = "UNDEFINED";
+parameter PORT_R_WIDTH = 9;
+parameter PORT_W_WIDTH = 9;
+parameter PORT_R_CLK_POL = 0;
+parameter PORT_W_CLK_POL = 0;
+parameter PORT_W_WR_EN_WIDTH = 1;
+
+reg [8:0] mem [0:15];
+
+integer i;
+initial
+	for (i = 0; i < 16; i += 1)
+		case (OPTION_INIT)
+		"NONE": mem[i] = mem[i]; //?
+		"ZERO": mem[i] = 9'h0;
+		"ANY": mem[i] = INIT[i*9+:9];
+		"NO_UNDEF": mem[i] = INIT[i*9+:9];
+		"UNDEFINED": mem[i] = 9'hx;
+		endcase
+
+wire [3:0] addr_r;
+assign addr_r = PORT_R_ADDR[6:3];
+reg [17:0] mem_read;
+reg [2:0] subaddr_r;
+always @(negedge (PORT_R_CLK ^ PORT_R_CLK_POL)) begin
+	subaddr_r <= PORT_R_ADDR[2:0];
+	mem_read[8:0] <= mem[addr_r];
+	if (PORT_R_WIDTH == 18)
+		mem_read[17:9] <= mem[addr_r + 1];
+end
+
+always @(mem_read, subaddr_r) begin
+	case (PORT_R_WIDTH)
+	18: PORT_R_RD_DATA <= mem_read;
+	9:  PORT_R_RD_DATA <= mem_read[8:0];
+	4:  PORT_R_RD_DATA <= mem_read[subaddr_r[2]*4+:4];
+	2:  PORT_R_RD_DATA <= mem_read[subaddr_r[2:1]*2+:2];
+	1:  PORT_R_RD_DATA <= mem_read[subaddr_r];
+	endcase
+end
+
+wire [3:0] addr_w;
+assign addr_w = PORT_W_ADDR[6:3];
+always @(negedge (PORT_W_CLK ^ PORT_W_CLK_POL)) begin
+	if (PORT_W_WR_EN[0])
+		case (PORT_W_WIDTH)
+		18,
+		9: mem[addr_w] <= PORT_W_WR_DATA[8:0];
+		4: mem[addr_w][PORT_W_ADDR[2]*4+:4] <= PORT_W_WR_DATA;
+		2: mem[addr_w][PORT_W_ADDR[2:1]*2+:2] <= PORT_W_WR_DATA;
+		1: mem[addr_w][PORT_W_ADDR[2:0]] <= PORT_W_WR_DATA;
+		endcase
+	if (PORT_W_WR_EN[1])
+		mem[addr_w + 1] <= PORT_W_WR_DATA[17:9];
+end
+
+endmodule
diff --git a/tests/memlib/memlib_block_sp_full.txt b/tests/memlib/memlib_block_sp_full.txt
new file mode 100644
index 000000000..000f91af3
--- /dev/null
+++ b/tests/memlib/memlib_block_sp_full.txt
@@ -0,0 +1,61 @@
+ram block \RAM_BLOCK_SP {
+	cost 2;
+	abits 4;
+	width 16;
+	byte 8;
+	port srsw "A" {
+		clock posedge;
+		clken;
+		rden;
+
+		option "RDWR" "NO_CHANGE" {
+			rdwr no_change;
+		}
+		option "RDWR" "OLD" {
+			rdwr old;
+		}
+		option "RDWR" "NEW" {
+			rdwr new;
+		}
+		option "RDWR" "NEW_ONLY" {
+			rdwr new_only;
+		}
+
+		ifdef USE_ARST {
+			option "RDARST" "ZERO" {
+				rdarst zero;
+			}
+			option "RDARST" "ANY" {
+				rdarst any;
+			}
+		}
+
+		ifdef USE_SRST {
+			option "SRST_BLOCK" 0 {
+				option "SRST_GATE" 0 {
+					rdsrst zero ungated;
+				}
+				option "SRST_GATE" 1 {
+					rdsrst zero gated_clken;
+				}
+				option "SRST_GATE" 2 {
+					rdsrst zero gated_rden;
+				}
+			}
+		}
+
+		ifdef USE_SRST_BLOCKING {
+			option "SRST_BLOCK" 1 {
+				option "SRST_GATE" 0 {
+					rdsrst zero ungated block_wr;
+				}
+				option "SRST_GATE" 1 {
+					rdsrst zero gated_clken block_wr;
+				}
+				option "SRST_GATE" 2 {
+					rdsrst zero gated_rden block_wr;
+				}
+			}
+		}
+	}
+}
diff --git a/tests/memlib/memlib_block_sp_full.v b/tests/memlib/memlib_block_sp_full.v
new file mode 100644
index 000000000..8ba32b9ed
--- /dev/null
+++ b/tests/memlib/memlib_block_sp_full.v
@@ -0,0 +1,82 @@
+module RAM_BLOCK_SP(
+	input PORT_A_CLK,
+	input PORT_A_CLK_EN,
+	input PORT_A_RD_EN,
+	input PORT_A_RD_ARST,
+	input PORT_A_RD_SRST,
+	input [1:0] PORT_A_WR_EN,
+	input [3:0] PORT_A_ADDR,
+	output reg [15:0] PORT_A_RD_DATA,
+	input [15:0] PORT_A_WR_DATA
+);
+
+parameter OPTION_RDWR = "UNDEFINED";
+parameter OPTION_RDINIT = "UNDEFINED";
+parameter OPTION_RDARST = "UNDEFINED";
+parameter OPTION_RDSRST = "ZERO";
+parameter OPTION_SRST_GATE = 0;
+parameter OPTION_SRST_BLOCK = 0;
+parameter PORT_A_RD_INIT_VALUE = 16'hxxxx;
+parameter PORT_A_RD_ARST_VALUE = 16'hxxxx;
+parameter PORT_A_RD_SRST_VALUE = 16'hxxxx;
+
+reg [15:0] mem [0:15];
+
+initial
+	if (OPTION_RDINIT == "ZERO")
+		PORT_A_RD_DATA = 0;
+	else if (OPTION_RDINIT == "ANY")
+		PORT_A_RD_DATA = PORT_A_RD_INIT_VALUE;
+
+localparam ARST_VALUE = 
+	(OPTION_RDARST == "ZERO") ? 16'h0000 :
+	(OPTION_RDARST == "INIT") ? PORT_A_RD_INIT_VALUE :
+	(OPTION_RDARST == "ANY") ? PORT_A_RD_ARST_VALUE :
+	16'hxxxx;
+
+localparam SRST_VALUE = 
+	(OPTION_RDSRST == "ZERO") ? 16'h0000 :
+	(OPTION_RDSRST == "INIT") ? PORT_A_RD_INIT_VALUE :
+	(OPTION_RDSRST == "ANY") ? PORT_A_RD_SRST_VALUE :
+	16'hxxxx;
+
+pulldown (PORT_A_RD_ARST);
+pulldown (PORT_A_RD_SRST);
+
+always @(posedge PORT_A_CLK) begin
+	if (PORT_A_CLK_EN) begin
+		if (!(PORT_A_RD_SRST && OPTION_SRST_BLOCK)) begin
+			if (PORT_A_WR_EN[0])
+				mem[PORT_A_ADDR][7:0] <= PORT_A_WR_DATA[7:0];
+			if (PORT_A_WR_EN[1])
+				mem[PORT_A_ADDR][15:8] <= PORT_A_WR_DATA[15:8];
+		end
+		if (PORT_A_RD_EN && (!PORT_A_WR_EN || OPTION_RDWR != "NO_CHANGE")) begin
+			PORT_A_RD_DATA <= mem[PORT_A_ADDR];
+			if (PORT_A_WR_EN && OPTION_RDWR == "NEW_ONLY")
+				PORT_A_RD_DATA <= 16'hx;
+			if (PORT_A_WR_EN[0])
+				case (OPTION_RDWR)
+				"NEW": PORT_A_RD_DATA[7:0] <= PORT_A_WR_DATA[7:0];
+				"NEW_ONLY": PORT_A_RD_DATA[7:0] <= PORT_A_WR_DATA[7:0];
+				"UNDEFINED": PORT_A_RD_DATA[7:0] <= 8'hx;
+				endcase
+			if (PORT_A_WR_EN[1])
+				case (OPTION_RDWR)
+				"NEW": PORT_A_RD_DATA[15:8] <= PORT_A_WR_DATA[15:8];
+				"NEW_ONLY": PORT_A_RD_DATA[15:8] <= PORT_A_WR_DATA[15:8];
+				"UNDEFINED": PORT_A_RD_DATA[15:8] <= 8'hx;
+				endcase
+		end
+	end
+	if (PORT_A_RD_SRST && (!OPTION_SRST_GATE || (OPTION_SRST_GATE == 2 && PORT_A_RD_EN) || (OPTION_SRST_GATE == 1 && PORT_A_CLK_EN)))
+		PORT_A_RD_DATA <= SRST_VALUE;
+end
+
+always @(PORT_A_RD_ARST)
+	if (PORT_A_RD_ARST)
+		force PORT_A_RD_DATA = ARST_VALUE;
+	else
+		release PORT_A_RD_DATA;
+
+endmodule
diff --git a/tests/memlib/memlib_clock_sdp.txt b/tests/memlib/memlib_clock_sdp.txt
new file mode 100644
index 000000000..00e911ef8
--- /dev/null
+++ b/tests/memlib/memlib_clock_sdp.txt
@@ -0,0 +1,76 @@
+ram block \RAM_CLOCK_SDP {
+	cost 64;
+	abits 10;
+	widths 1 2 4 8 16 per_port;
+	init any;
+	port sw "W" {
+		ifdef SHARED_CLK {
+			ifdef WCLK_ANY {
+				option "WCLK" "ANY" {
+					clock anyedge "CLK";
+				}
+			}
+			ifdef WCLK_POS {
+				option "WCLK" "POS" {
+					clock posedge "CLK";
+				}
+			}
+			ifdef WCLK_NEG {
+				option "WCLK" "NEG" {
+					clock negedge "CLK";
+				}
+			}
+		} else {
+			ifdef WCLK_ANY {
+				option "WCLK" "ANY" {
+					clock anyedge;
+				}
+			}
+			ifdef WCLK_POS {
+				option "WCLK" "POS" {
+					clock posedge;
+				}
+			}
+			ifdef WCLK_NEG {
+				option "WCLK" "NEG" {
+					clock negedge;
+				}
+			}
+		}
+	}
+	port sr "R" {
+		ifdef SHARED_CLK {
+			ifdef RCLK_ANY {
+				option "RCLK" "ANY" {
+					clock anyedge "CLK";
+				}
+			}
+			ifdef RCLK_POS {
+				option "RCLK" "POS" {
+					clock posedge "CLK";
+				}
+			}
+			ifdef RCLK_NEG {
+				option "RCLK" "NEG" {
+					clock negedge "CLK";
+				}
+			}
+		} else {
+			ifdef RCLK_ANY {
+				option "RCLK" "ANY" {
+					clock anyedge;
+				}
+			}
+			ifdef RCLK_POS {
+				option "RCLK" "POS" {
+					clock posedge;
+				}
+			}
+			ifdef RCLK_NEG {
+				option "RCLK" "NEG" {
+					clock negedge;
+				}
+			}
+		}
+	}
+}
diff --git a/tests/memlib/memlib_clock_sdp.v b/tests/memlib/memlib_clock_sdp.v
new file mode 100644
index 000000000..e9036351e
--- /dev/null
+++ b/tests/memlib/memlib_clock_sdp.v
@@ -0,0 +1,36 @@
+module RAM_CLOCK_SDP(
+	input CLK_CLK,
+	input PORT_R_CLK,
+	input [9:0] PORT_R_ADDR,
+	output reg [15:0] PORT_R_RD_DATA,
+	input PORT_W_CLK,
+	input PORT_W_WR_EN,
+	input [9:0] PORT_W_ADDR,
+	input [15:0] PORT_W_WR_DATA
+);
+
+parameter INIT = 0;
+parameter PORT_R_WIDTH = 1;
+parameter PORT_W_WIDTH = 1;
+parameter CLK_CLK_POL = 0;
+parameter PORT_R_CLK_POL = 0;
+parameter PORT_W_CLK_POL = 0;
+parameter OPTION_WCLK = "ANY";
+parameter OPTION_RCLK = "ANY";
+
+reg [2**10-1:0] mem = INIT;
+
+wire RCLK;
+case (OPTION_RCLK)
+"ANY": assign RCLK = PORT_R_CLK == PORT_R_CLK_POL;
+"POS": assign RCLK = PORT_R_CLK;
+"NEG": assign RCLK = ~PORT_R_CLK;
+endcase
+always @(posedge RCLK)
+	PORT_R_RD_DATA <= mem[PORT_R_ADDR+:PORT_R_WIDTH];
+
+always @(negedge PORT_W_CLK ^ (PORT_W_CLK_POL || OPTION_WCLK == "POS"))
+	if (PORT_W_WR_EN)
+		mem[PORT_W_ADDR+:PORT_W_WIDTH] <= PORT_W_WR_DATA;
+
+endmodule
diff --git a/tests/memlib/memlib_lut.txt b/tests/memlib/memlib_lut.txt
index 0cc8fda15..9f6d84123 100644
--- a/tests/memlib/memlib_lut.txt
+++ b/tests/memlib/memlib_lut.txt
@@ -1,7 +1,23 @@
 ram distributed \RAM_LUT {
 	abits 4;
 	width 4;
-	init any;
+	ifdef INIT_NONE {
+		option "INIT" "NONE" {
+			init none;
+		}
+	} else ifdef INIT_ZERO {
+		option "INIT" "ZERO" {
+			init zero;
+		}
+	} else ifdef INIT_NO_UNDEF {
+		option "INIT" "NO_UNDEF" {
+			init no_undef;
+		}
+	} else {
+		option "INIT" "ANY" {
+			init any;
+		}
+	}
 	cost 4;
 	port ar "R" {
 	}
diff --git a/tests/memlib/memlib_lut.v b/tests/memlib/memlib_lut.v
index 1f20a110a..2685d2337 100644
--- a/tests/memlib/memlib_lut.v
+++ b/tests/memlib/memlib_lut.v
@@ -9,6 +9,7 @@ module RAM_LUT(
 );
 
 parameter INIT = 0;
+parameter OPTION_INIT = "UNDEFINED";
 parameter PORT_RW_CLK_POL = 1;
 
 reg [3:0] mem [0:15];
@@ -16,7 +17,13 @@ reg [3:0] mem [0:15];
 integer i;
 initial
 	for (i = 0; i < 16; i += 1)
-		mem[i] = INIT[i*4+:4];
+		case (OPTION_INIT)
+		"NONE": mem[i] = mem[i]; //?
+		"ZERO": mem[i] = 4'h0;
+		"ANY": mem[i] = INIT[i*4+:4];
+		"NO_UNDEF": mem[i] = INIT[i*4+:4];
+		"UNDEFINED": mem[i] = 4'hx;
+		endcase
 
 assign PORT_R_RD_DATA = mem[PORT_R_ADDR];
 assign PORT_RW_RD_DATA = mem[PORT_RW_ADDR];
diff --git a/tests/memlib/memlib_multilut.txt b/tests/memlib/memlib_multilut.txt
new file mode 100644
index 000000000..387f4f8e2
--- /dev/null
+++ b/tests/memlib/memlib_multilut.txt
@@ -0,0 +1,19 @@
+ram distributed \LUT_MULTI {
+	abits 4;
+	width 2;
+	init any;
+	port arsw "RW" {
+		clock posedge;
+	}
+	ifdef PORTS_QUAD {
+		option "PORTS" "QUAD" {
+			port ar "R0" "R1" "R2" {
+			}
+		}
+	} else ifdef PORTS_OCT {
+		option "PORTS" "OCT" {
+			port ar "R0" "R1" "R2" "R3" "R4" "R5" "R6" {
+			}
+		}
+	}
+}
diff --git a/tests/memlib/memlib_multilut.v b/tests/memlib/memlib_multilut.v
new file mode 100644
index 000000000..a623d41fd
--- /dev/null
+++ b/tests/memlib/memlib_multilut.v
@@ -0,0 +1,45 @@
+module LUT_MULTI(
+	input [3:0] PORT_R0_ADDR,
+	input [3:0] PORT_R1_ADDR,
+	input [3:0] PORT_R2_ADDR,
+	input [3:0] PORT_R3_ADDR,
+	input [3:0] PORT_R4_ADDR,
+	input [3:0] PORT_R5_ADDR,
+	input [3:0] PORT_R6_ADDR,
+	input [3:0] PORT_RW_ADDR,
+	input PORT_RW_CLK,
+	input PORT_RW_WR_EN,
+	input [1:0] PORT_RW_WR_DATA,
+	output [1:0] PORT_R0_RD_DATA,
+	output [1:0] PORT_R1_RD_DATA,
+	output [1:0] PORT_R2_RD_DATA,
+	output [1:0] PORT_R3_RD_DATA,
+	output [1:0] PORT_R4_RD_DATA,
+	output [1:0] PORT_R5_RD_DATA,
+	output [1:0] PORT_R6_RD_DATA,
+	output [1:0] PORT_RW_RD_DATA
+);
+
+parameter INIT = 0;
+parameter OPTION_PORTS = "UNDEFINED";
+
+reg [1:0] mem [0:15];
+integer i;
+initial
+	for (i = 0; i < 16; i += 1)
+		mem[i] = INIT[i*4+:4];
+
+assign PORT_R0_RD_DATA = mem[PORT_R0_ADDR];
+assign PORT_R1_RD_DATA = mem[PORT_R1_ADDR];
+assign PORT_R2_RD_DATA = mem[PORT_R2_ADDR];
+assign PORT_R3_RD_DATA = mem[PORT_R3_ADDR];
+assign PORT_R4_RD_DATA = mem[PORT_R4_ADDR];
+assign PORT_R5_RD_DATA = mem[PORT_R5_ADDR];
+assign PORT_R6_RD_DATA = mem[PORT_R6_ADDR];
+assign PORT_RW_RD_DATA = mem[PORT_RW_ADDR];
+
+always @(posedge PORT_RW_CLK)
+	if (PORT_RW_WR_EN)
+		mem[PORT_RW_ADDR] <= PORT_RW_WR_DATA;
+
+endmodule
diff --git a/tests/memlib/memlib_wren.txt b/tests/memlib/memlib_wren.txt
new file mode 100644
index 000000000..31ff3ff60
--- /dev/null
+++ b/tests/memlib/memlib_wren.txt
@@ -0,0 +1,37 @@
+ram block \RAM_WREN {
+	abits 4;
+	init none;
+
+	ifdef NO_BYTE {
+		# single enable signal
+		widths 4 8 global;
+	} else ifdef W4_B4 {
+		widths 4 global;
+		byte 4;
+	} else ifdef W8_B4 {
+		widths 8 global;
+		option "BYTESIZE" 4 {
+			byte 4;
+		}
+	} else ifdef W8_B8 {
+		width 8;
+		byte 8;
+	} else ifdef W16_B4 {
+		widths 16 global;
+		option "BYTESIZE" 4 {
+			byte 4;
+		}
+	} else ifdef W64_B8 {
+		widths 64 global;
+		option "BYTESIZE" 8 {
+			byte 8;
+		}
+	}
+
+	port srsw "A" {
+		clock posedge;
+		ifdef WRBE_SEPARATE {
+			wrbe_separate;
+		}
+	}
+}
diff --git a/tests/memlib/memlib_wren.v b/tests/memlib/memlib_wren.v
new file mode 100644
index 000000000..b9433d42e
--- /dev/null
+++ b/tests/memlib/memlib_wren.v
@@ -0,0 +1,33 @@
+module RAM_WREN (
+	input PORT_A_CLK,
+	input [ABITS-1:0] PORT_A_ADDR,
+	input [WIDTH-1:0] PORT_A_WR_DATA,
+	output reg [WIDTH-1:0] PORT_A_RD_DATA,
+	input [PORT_A_WR_EN_WIDTH-1:0] PORT_A_WR_EN,
+	input [PORT_A_WR_BE_WIDTH-1:0] PORT_A_WR_BE
+);
+
+parameter ABITS=4;
+parameter WIDTH=8;
+parameter PORT_A_WR_EN_WIDTH=1;
+parameter PORT_A_WR_BE_WIDTH=0;
+parameter OPTION_BYTESIZE=WIDTH;
+parameter WB=OPTION_BYTESIZE;
+
+reg [WIDTH-1:0] mem [0:2**ABITS-1];
+
+integer i;
+always @(posedge PORT_A_CLK) begin
+	for (i=0; i<PORT_A_WR_EN_WIDTH; i=i+1) // use PORT_A_WR_EN
+		if (!PORT_A_WR_BE_WIDTH && PORT_A_WR_EN[i])
+			mem[PORT_A_ADDR][i*WB+:WB] <= PORT_A_WR_DATA[i*WB+:WB];
+	for (i=0; i<PORT_A_WR_BE_WIDTH; i=i+1) // use PORT_A_WR_BE
+		if (PORT_A_WR_EN[0] && PORT_A_WR_BE[i])
+			mem[PORT_A_ADDR][i*WB+:WB] <= PORT_A_WR_DATA[i*WB+:WB];
+end
+
+always @(posedge PORT_A_CLK)
+	if (!PORT_A_WR_EN[0])
+		PORT_A_RD_DATA <= mem[PORT_A_ADDR];
+
+endmodule