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-rw-r--r--techlibs/gowin/Makefile.inc10
-rw-r--r--techlibs/gowin/bram.txt29
-rw-r--r--techlibs/gowin/brams_init3.vh12
-rw-r--r--techlibs/gowin/brams_map.v103
-rw-r--r--techlibs/gowin/cells_map.v6
-rw-r--r--techlibs/gowin/cells_sim.v134
-rw-r--r--techlibs/gowin/determine_init.cc72
-rw-r--r--techlibs/gowin/dram.txt17
-rw-r--r--techlibs/gowin/drams_map.v31
-rw-r--r--techlibs/gowin/synth_gowin.cc54
10 files changed, 458 insertions, 10 deletions
diff --git a/techlibs/gowin/Makefile.inc b/techlibs/gowin/Makefile.inc
index 2f82def7d..6f2159349 100644
--- a/techlibs/gowin/Makefile.inc
+++ b/techlibs/gowin/Makefile.inc
@@ -1,7 +1,17 @@
OBJS += techlibs/gowin/synth_gowin.o
+OBJS += techlibs/gowin/determine_init.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))
$(eval $(call add_share_file,share/gowin,techlibs/gowin/arith_map.v))
+$(eval $(call add_share_file,share/gowin,techlibs/gowin/brams_map.v))
+$(eval $(call add_share_file,share/gowin,techlibs/gowin/bram.txt))
+$(eval $(call add_share_file,share/gowin,techlibs/gowin/drams_map.v))
+$(eval $(call add_share_file,share/gowin,techlibs/gowin/dram.txt))
+
+
+
+$(eval $(call add_share_file,share/gowin,techlibs/gowin/brams_init3.vh))
diff --git a/techlibs/gowin/bram.txt b/techlibs/gowin/bram.txt
new file mode 100644
index 000000000..b5f9a981c
--- /dev/null
+++ b/techlibs/gowin/bram.txt
@@ -0,0 +1,29 @@
+bram $__GW1NR_SDP
+# uncomment when done
+# init 1
+ abits 10 @a10d18
+ dbits 16 @a10d18
+ abits 11 @a11d9
+ dbits 8 @a11d9
+ abits 12 @a12d4
+ dbits 4 @a12d4
+ abits 13 @a13d2
+ dbits 2 @a13d2
+ abits 14 @a14d1
+ dbits 1 @a14d1
+ groups 2
+ ports 1 1
+ wrmode 1 0
+ enable 1 1 @a10d18
+ enable 1 1 @a11d9 @a12d4 @a13d2 @a14d1
+ transp 0 0
+ clocks 2 3
+ clkpol 2 3
+endbram
+
+match $__GW1NR_SDP
+ min bits 2048
+ min efficiency 5
+ shuffle_enable B
+ make_transp
+endmatch
diff --git a/techlibs/gowin/brams_init3.vh b/techlibs/gowin/brams_init3.vh
new file mode 100644
index 000000000..84397fa24
--- /dev/null
+++ b/techlibs/gowin/brams_init3.vh
@@ -0,0 +1,12 @@
+localparam [15:0] INIT_0 = {
+ INIT[ 60], INIT[ 56], INIT[ 52], INIT[ 48], INIT[ 44], INIT[ 40], INIT[ 36], INIT[ 32], INIT[ 28], INIT[ 24], INIT[ 20], INIT[ 16], INIT[ 12], INIT[ 8], INIT[ 4], INIT[ 0]
+};
+localparam [15:0] INIT_1 = {
+ INIT[ 61], INIT[ 57], INIT[ 53], INIT[ 49], INIT[ 45], INIT[ 41], INIT[ 37], INIT[ 33], INIT[ 29], INIT[ 25], INIT[ 21], INIT[ 17], INIT[ 13], INIT[ 9], INIT[ 5], INIT[ 1]
+};
+localparam [15:0] INIT_2 = {
+ INIT[ 62], INIT[ 58], INIT[ 54], INIT[ 50], INIT[ 46], INIT[ 42], INIT[ 38], INIT[ 34], INIT[ 30], INIT[ 26], INIT[ 22], INIT[ 18], INIT[ 14], INIT[ 10], INIT[ 6], INIT[ 2]
+};
+localparam [15:0] INIT_3 = {
+ INIT[ 63], INIT[ 59], INIT[ 55], INIT[ 51], INIT[ 47], INIT[ 43], INIT[ 39], INIT[ 35], INIT[ 31], INIT[ 27], INIT[ 23], INIT[ 19], INIT[ 15], INIT[ 11], INIT[ 7], INIT[ 3]
+};
diff --git a/techlibs/gowin/brams_map.v b/techlibs/gowin/brams_map.v
new file mode 100644
index 000000000..e963cfa88
--- /dev/null
+++ b/techlibs/gowin/brams_map.v
@@ -0,0 +1,103 @@
+/* Semi Dual Port (SDP) memory have the following configurations:
+ * Memory Config RAM(BIT) Port Mode Memory Depth Data Depth
+ * ----------------|---------| ----------|--------------|------------|
+ * B-SRAM_16K_SD1 16K 16Kx1 16,384 1
+ * B-SRAM_8K_SD2 16K 8Kx2 8,192 2
+ * B-SRAM_4K_SD4 16K 4Kx2 4,096 4
+ */
+module \$__GW1NR_SDP (CLK2, CLK3, A1ADDR, A1DATA, A1EN, B1ADDR, B1DATA, B1EN);
+ parameter CFG_ABITS = 10;
+ parameter CFG_DBITS = 16;
+ parameter CFG_ENABLE_A = 3;
+
+ parameter [16383:0] INIT = 16384'hx;
+ parameter CLKPOL2 = 1;
+ parameter CLKPOL3 = 1;
+
+ input CLK2;
+ input CLK3;
+
+ input [CFG_ABITS-1:0] A1ADDR;
+ input [CFG_DBITS-1:0] A1DATA;
+ input [CFG_ENABLE_A-1:0] A1EN;
+
+ input [CFG_ABITS-1:0] B1ADDR;
+ output [CFG_DBITS-1:0] B1DATA;
+ input B1EN;
+
+
+ generate if (CFG_DBITS == 1) begin
+ SDP #(
+ .READ_MODE(0),
+ .BIT_WIDTH_0(1),
+ .BIT_WIDTH_1(1),
+ .BLK_SEL(3'b000),
+ .RESET_MODE("SYNC")
+ ) _TECHMAP_REPLACE_ (
+ .CLKA(CLK2), .CLKB(CLK3),
+ .WREA(A1EN), .OCE(1'b0), .CEA(1'b1),
+ .WREB(1'b0), .CEB(B1EN),
+ .RESETA(1'b0), .RESETB(1'b0), .BLKSEL(3'b000),
+ .DI(A1DATA), .DO(B1DATA), .ADA(A1ADDR), .ADB(B1ADDR)
+ );
+ end else if (CFG_DBITS == 2) begin
+ SDP #(
+ .READ_MODE(0),
+ .BIT_WIDTH_0(2),
+ .BIT_WIDTH_1(2),
+ .BLK_SEL(3'b000),
+ .RESET_MODE("SYNC")
+ ) _TECHMAP_REPLACE_ (
+ .CLKA(CLK2), .CLKB(CLK3),
+ .WREA(A1EN), .OCE(1'b0), .CEA(1'b1),
+ .WREB(1'b0), .CEB(B1EN),
+ .RESETA(1'b0), .RESETB(1'b0), .BLKSEL(3'b000),
+ .DI(A1DATA), .DO(B1DATA), .ADA(A1ADDR), .ADB(B1ADDR)
+ );
+ end else if (CFG_DBITS <= 4) begin
+ SDP #(
+ .READ_MODE(0),
+ .BIT_WIDTH_0(4),
+ .BIT_WIDTH_1(4),
+ .BLK_SEL(3'b000),
+ .RESET_MODE("SYNC")
+ ) _TECHMAP_REPLACE_ (
+ .CLKA(CLK2), .CLKB(CLK3),
+ .WREA(A1EN), .OCE(1'b0),
+ .WREB(1'b0), .CEB(B1EN), .CEA(1'b1),
+ .RESETA(1'b0), .RESETB(1'b0), .BLKSEL(3'b000),
+ .DI(A1DATA), .DO(B1DATA), .ADA(A1ADDR), .ADB(B1ADDR)
+ );
+ end else if (CFG_DBITS <= 8) begin
+ SDP #(
+ .READ_MODE(0),
+ .BIT_WIDTH_0(8),
+ .BIT_WIDTH_1(8),
+ .BLK_SEL(3'b000),
+ .RESET_MODE("SYNC")
+ ) _TECHMAP_REPLACE_ (
+ .CLKA(CLK2), .CLKB(CLK3),
+ .WREA(A1EN), .OCE(1'b0), .CEA(1'b1),
+ .WREB(1'b0), .CEB(B1EN),
+ .RESETA(1'b0), .RESETB(1'b0), .BLKSEL(3'b000),
+ .DI(A1DATA), .DO(B1DATA), .ADA(A1ADDR), .ADB(B1ADDR)
+ );
+ end else if (CFG_DBITS <= 16) begin
+ SDP #(
+ .READ_MODE(0),
+ .BIT_WIDTH_0(16),
+ .BIT_WIDTH_1(16),
+ .BLK_SEL(3'b000),
+ .RESET_MODE("SYNC")
+ ) _TECHMAP_REPLACE_ (
+ .CLKA(CLK2), .CLKB(CLK3),
+ .WREA(A1EN), .OCE(1'b0),
+ .WREB(1'b0), .CEB(B1EN), .CEA(1'b1),
+ .RESETA(1'b0), .RESETB(1'b0), .BLKSEL(3'b000),
+ .DI(A1DATA), .DO(B1DATA), .ADA(A1ADDR), .ADB(B1ADDR)
+ );
+ end else begin
+ wire TECHMAP_FAIL = 1'b1;
+ end endgenerate
+
+endmodule
diff --git a/techlibs/gowin/cells_map.v b/techlibs/gowin/cells_map.v
index e1f85effa..ebdc88a0a 100644
--- a/techlibs/gowin/cells_map.v
+++ b/techlibs/gowin/cells_map.v
@@ -1,5 +1,9 @@
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 \$_DFF_P_ #(parameter INIT = 1'b0) (input D, C, output Q); DFF #(.INIT(INIT)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .CLK(C)); endmodule
+
+module \$__DFFS_PN0_ (input D, C, R, output Q); DFFR _TECHMAP_REPLACE_ (.D(D), .Q(Q), .CLK(C), .RESET(!R)); endmodule
+module \$__DFFS_PP0_ (input D, C, R, output Q); DFFR _TECHMAP_REPLACE_ (.D(D), .Q(Q), .CLK(C), .RESET(R)); endmodule
+module \$__DFFS_PP1_ (input D, C, R, output Q); DFFR _TECHMAP_REPLACE_ (.D(D), .Q(Q), .CLK(C), .RESET(R)); endmodule
module \$lut (A, Y);
parameter WIDTH = 0;
diff --git a/techlibs/gowin/cells_sim.v b/techlibs/gowin/cells_sim.v
index 14441c2fc..ebb238bad 100644
--- a/techlibs/gowin/cells_sim.v
+++ b/techlibs/gowin/cells_sim.v
@@ -38,6 +38,17 @@ module DFFN (output reg Q, input CLK, D);
Q <= D;
endmodule
+module DFFR (output reg Q, input D, CLK, RESET);
+ parameter [0:0] INIT = 1'b0;
+ initial Q = INIT;
+ always @(posedge CLK) begin
+ if (RESET)
+ Q <= 1'b0;
+ else
+ Q <= D;
+ end
+endmodule // DFFR (positive clock edge; synchronous reset)
+
module VCC(output V);
assign V = 1;
endmodule
@@ -63,3 +74,126 @@ module ALU (input I0, input I1, input I3, input CIN, output COUT, output SUM);
assign {COUT, SUM} = CIN + I1 + I0;
endmodule // alu
+module RAM16S4 (DO, DI, AD, WRE, CLK);
+ parameter WIDTH = 4;
+ parameter INIT_0 = 16'h0000;
+ parameter INIT_1 = 16'h0000;
+ parameter INIT_2 = 16'h0000;
+ parameter INIT_3 = 16'h0000;
+
+ input [WIDTH-1:0] AD;
+ input [WIDTH-1:0] DI;
+ output [WIDTH-1:0] DO;
+ input CLK;
+ input WRE;
+
+ reg [15:0] mem0, mem1, mem2, mem3;
+
+ initial begin
+ mem0 = INIT_0;
+ mem1 = INIT_1;
+ mem2 = INIT_2;
+ mem3 = INIT_3;
+ end
+
+ assign DO[0] = mem0[AD];
+ assign DO[1] = mem1[AD];
+ assign DO[2] = mem2[AD];
+ assign DO[3] = mem3[AD];
+
+ always @(posedge CLK) begin
+ if (WRE) begin
+ mem0[AD] <= DI[0];
+ mem1[AD] <= DI[1];
+ mem2[AD] <= DI[2];
+ mem3[AD] <= DI[3];
+ end
+ end
+
+endmodule // RAM16S4
+
+
+(* blackbox *)
+module SDP (DO, DI, BLKSEL, ADA, ADB, WREA, WREB, CLKA, CLKB, CEA, CEB, OCE, RESETA, RESETB);
+//1'b0: Bypass mode; 1'b1 Pipeline mode
+parameter READ_MODE = 1'b0;
+parameter BIT_WIDTH_0 = 32; // 1, 2, 4, 8, 16, 32
+parameter BIT_WIDTH_1 = 32; // 1, 2, 4, 8, 16, 32
+parameter BLK_SEL = 3'b000;
+parameter RESET_MODE = "SYNC";
+parameter INIT_RAM_00 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_01 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_02 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_03 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_04 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_05 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_06 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_07 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_08 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_09 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_0A = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_0B = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_0C = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_0D = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_0E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_0F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_10 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_11 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_12 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_13 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_14 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_15 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_16 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_17 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_18 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_19 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_1A = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_1B = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_1C = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_1D = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_1E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_1F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_20 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_21 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_22 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_23 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_24 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_25 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_26 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_27 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_28 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_29 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_2A = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_2B = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_2C = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_2D = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_2E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_2F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_30 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_31 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_32 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_33 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_34 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_35 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_36 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_37 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_38 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_39 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_3A = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_3B = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_3C = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_3D = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_3E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+parameter INIT_RAM_3F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+
+input CLKA, CEA, CLKB, CEB;
+input OCE; // clock enable of memory output register
+input RESETA, RESETB; // resets output registers, not memory contents
+input WREA, WREB; // 1'b0: read enabled; 1'b1: write enabled
+input [13:0] ADA, ADB;
+input [31:0] DI;
+input [2:0] BLKSEL;
+output [31:0] DO;
+
+endmodule
+
diff --git a/techlibs/gowin/determine_init.cc b/techlibs/gowin/determine_init.cc
new file mode 100644
index 000000000..991e5245a
--- /dev/null
+++ b/techlibs/gowin/determine_init.cc
@@ -0,0 +1,72 @@
+/*
+ * yosys -- Yosys Open SYnthesis Suite
+ *
+ * Copyright (C) 2018 Icenowy Zheng <icenowy@aosc.io>
+ *
+ * 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 DetermineInitPass : public Pass {
+ DetermineInitPass() : Pass("determine_init", "Determine the init value of cells") { }
+ void help() YS_OVERRIDE
+ {
+ log("\n");
+ log(" determine_init [selection]\n");
+ log("\n");
+ log("Determine the init value of cells that doesn't allow unknown init value.\n");
+ log("\n");
+ }
+
+ Const determine_init(Const init)
+ {
+ for (int i = 0; i < GetSize(init); i++) {
+ if (init[i] != State::S0 && init[i] != State::S1)
+ init[i] = State::S0;
+ }
+
+ return init;
+ }
+
+ void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
+ {
+ log_header(design, "Executing DETERMINE_INIT pass (determine init value for cells).\n");
+
+ extra_args(args, args.size(), design);
+
+ size_t cnt = 0;
+ for (auto module : design->selected_modules())
+ {
+ for (auto cell : module->selected_cells())
+ {
+ if (cell->type == "\\RAM16S4")
+ {
+ cell->setParam("\\INIT_0", determine_init(cell->getParam("\\INIT_0")));
+ cell->setParam("\\INIT_1", determine_init(cell->getParam("\\INIT_1")));
+ cell->setParam("\\INIT_2", determine_init(cell->getParam("\\INIT_2")));
+ cell->setParam("\\INIT_3", determine_init(cell->getParam("\\INIT_3")));
+ cnt++;
+ }
+ }
+ }
+ log_header(design, "Updated %lu cells with determined init value.\n", cnt);
+ }
+} DetermineInitPass;
+
+PRIVATE_NAMESPACE_END
diff --git a/techlibs/gowin/dram.txt b/techlibs/gowin/dram.txt
new file mode 100644
index 000000000..9db530251
--- /dev/null
+++ b/techlibs/gowin/dram.txt
@@ -0,0 +1,17 @@
+bram $__GW1NR_RAM16S4
+ init 1
+ abits 4
+ dbits 4
+ groups 2
+ ports 1 1
+ wrmode 0 1
+ enable 0 1
+ transp 0 1
+ clocks 0 1
+ clkpol 0 1
+endbram
+
+match $__GW1NR_RAM16S4
+ make_outreg
+ min wports 1
+endmatch
diff --git a/techlibs/gowin/drams_map.v b/techlibs/gowin/drams_map.v
new file mode 100644
index 000000000..a50ab365a
--- /dev/null
+++ b/techlibs/gowin/drams_map.v
@@ -0,0 +1,31 @@
+module \$__GW1NR_RAM16S4 (CLK1, A1ADDR, A1DATA, A1EN, B1ADDR, B1DATA, B1EN);
+ parameter CFG_ABITS = 4;
+ parameter CFG_DBITS = 4;
+
+ parameter [63:0] INIT = 64'bx;
+ input CLK1;
+
+ input [CFG_ABITS-1:0] A1ADDR;
+ output [CFG_DBITS-1:0] A1DATA;
+ input A1EN;
+
+ input [CFG_ABITS-1:0] B1ADDR;
+ input [CFG_DBITS-1:0] B1DATA;
+ input B1EN;
+
+ `include "brams_init3.vh"
+
+ RAM16S4
+ #(.INIT_0(INIT_0),
+ .INIT_1(INIT_1),
+ .INIT_2(INIT_2),
+ .INIT_3(INIT_3))
+ _TECHMAP_REPLACE_
+ (.AD(B1ADDR),
+ .DI(B1DATA),
+ .DO(A1DATA),
+ .CLK(CLK1),
+ .WRE(B1EN));
+
+
+endmodule
diff --git a/techlibs/gowin/synth_gowin.cc b/techlibs/gowin/synth_gowin.cc
index c7983bade..ac3dbfb29 100644
--- a/techlibs/gowin/synth_gowin.cc
+++ b/techlibs/gowin/synth_gowin.cc
@@ -49,9 +49,15 @@ struct SynthGowinPass : public ScriptPass
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(" -nodffe\n");
+ log(" do not use flipflops with CE in output netlist\n");
+ log("\n");
log(" -nobram\n");
log(" do not use BRAM cells in output netlist\n");
log("\n");
+ log(" -nodram\n");
+ log(" do not use distributed RAM cells in output netlist\n");
+ log("\n");
log(" -noflatten\n");
log(" do not flatten design before synthesis\n");
log("\n");
@@ -65,7 +71,7 @@ struct SynthGowinPass : public ScriptPass
}
string top_opt, vout_file;
- bool retime, flatten, nobram;
+ bool retime, nobram, nodram, flatten, nodffe;
void clear_flags() YS_OVERRIDE
{
@@ -74,6 +80,8 @@ struct SynthGowinPass : public ScriptPass
retime = false;
flatten = true;
nobram = false;
+ nodffe = false;
+ nodram = false;
}
void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
@@ -108,6 +116,14 @@ struct SynthGowinPass : public ScriptPass
nobram = true;
continue;
}
+ if (args[argidx] == "-nodram") {
+ nodram = true;
+ continue;
+ }
+ if (args[argidx] == "-nodffe") {
+ nodffe = true;
+ continue;
+ }
if (args[argidx] == "-noflatten") {
flatten = false;
continue;
@@ -147,25 +163,43 @@ struct SynthGowinPass : public ScriptPass
{
run("synth -run coarse");
}
- if (!nobram && check_label("bram", "(skip if -nobram)"))
+
+ if (!nobram && check_label("bram", "(skip if -nobram)"))
{
run("memory_bram -rules +/gowin/bram.txt");
- run("techmap -map +/gowin/brams_map.v");
+ run("techmap -map +/gowin/brams_map.v -map +/gowin/cells_sim.v");
+ }
+
+ if (!nodram && check_label("dram", "(skip if -nodram)"))
+ {
+ run("memory_bram -rules +/gowin/dram.txt");
+ run("techmap -map +/gowin/drams_map.v");
+ run("determine_init");
}
+
if (check_label("fine"))
{
run("opt -fast -mux_undef -undriven -fine");
run("memory_map");
run("opt -undriven -fine");
run("techmap -map +/techmap.v -map +/gowin/arith_map.v");
- run("opt -fine");
- run("clean -purge");
- run("splitnets -ports");
- run("setundef -undriven -zero");
+ run("techmap -map +/techmap.v");
if (retime || help_mode)
run("abc -dff", "(only if -retime)");
}
+ if (check_label("map_ffs"))
+ {
+ run("dffsr2dff");
+ run("dff2dffs");
+ run("opt_clean");
+ if (!nodffe)
+ run("dff2dffe -direct-match $_DFF_* -direct-match $__DFFS_*");
+ run("techmap -map +/gowin/cells_map.v");
+ run("opt_expr -mux_undef");
+ run("simplemap");
+ }
+
if (check_label("map_luts"))
{
run("abc -lut 4");
@@ -176,8 +210,10 @@ struct SynthGowinPass : public ScriptPass
{
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");
+ run("iopadmap -bits -inpad IBUF O:I -outpad OBUF I:O", "(unless -noiopads)");
+ run("dffinit -ff DFF Q INIT");
+ run("clean");
+
}
if (check_label("check"))
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-04 08:13:05 +0000