From 221874ba4b8ce0b91cac96c225858c7ff8f0dfc2 Mon Sep 17 00:00:00 2001
From: YRabbit <rabbit@yrabbit.cyou>
Date: Sat, 25 Oct 2025 16:36:46 +1000
Subject: [PATCH] Gowin. Handle the WRITE_MODE.

Process the WRITE_MODE in the GW5A series in a more concise manner.

You can check it in the same way as in
https://github.com/YosysHQ/yosys/pull/5440

Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
---
 techlibs/gowin/Makefile.inc   |  1 -
 techlibs/gowin/brams.txt      | 12 ++++--
 techlibs/gowin/brams_gw5a.txt | 69 -----------------------------------
 techlibs/gowin/synth_gowin.cc |  2 +-
 4 files changed, 9 insertions(+), 75 deletions(-)
 delete mode 100644 techlibs/gowin/brams_gw5a.txt

diff --git a/techlibs/gowin/Makefile.inc b/techlibs/gowin/Makefile.inc
index 08893e73f..df1b79317 100644
--- a/techlibs/gowin/Makefile.inc
+++ b/techlibs/gowin/Makefile.inc
@@ -10,6 +10,5 @@ $(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/brams_map_gw5a.v))
 $(eval $(call add_share_file,share/gowin,techlibs/gowin/brams.txt))
-$(eval $(call add_share_file,share/gowin,techlibs/gowin/brams_gw5a.txt))
 $(eval $(call add_share_file,share/gowin,techlibs/gowin/lutrams_map.v))
 $(eval $(call add_share_file,share/gowin,techlibs/gowin/lutrams.txt))
diff --git a/techlibs/gowin/brams.txt b/techlibs/gowin/brams.txt
index 435d3b5cf..ee76dd73a 100644
--- a/techlibs/gowin/brams.txt
+++ b/techlibs/gowin/brams.txt
@@ -19,8 +19,10 @@ ram block $__GOWIN_SP_ {
 		portoption "WRITE_MODE" 1 {
 			rdwr new;
 		}
-		portoption "WRITE_MODE" 2 {
-			rdwr old;
+		ifndef gw5a {
+			portoption "WRITE_MODE" 2 {
+				rdwr old;
+			}
 		}
 	}
 }
@@ -46,8 +48,10 @@ ram block $__GOWIN_DP_ {
 		portoption "WRITE_MODE" 1 {
 			rdwr new;
 		}
-		portoption "WRITE_MODE" 2 {
-			rdwr old;
+		ifndef gw5a {
+			portoption "WRITE_MODE" 2 {
+				rdwr old;
+			}
 		}
 	}
 }
diff --git a/techlibs/gowin/brams_gw5a.txt b/techlibs/gowin/brams_gw5a.txt
deleted file mode 100644
index 2747ea451..000000000
--- a/techlibs/gowin/brams_gw5a.txt
+++ /dev/null
@@ -1,69 +0,0 @@
-ram block $__GOWIN_SP_ {
-	abits 14;
-	widths 1 2 4 9 18 36 per_port;
-	cost 128;
-	init no_undef;
-	port srsw "A" {
-		clock posedge;
-		clken;
-		option "RESET_MODE" "SYNC" {
-			rdsrst zero ungated;
-		}
-		option "RESET_MODE" "ASYNC" {
-			rdarst zero;
-		}
-		rdinit zero;
-		portoption "WRITE_MODE" 0 {
-			rdwr no_change;
-		}
-		portoption "WRITE_MODE" 1 {
-			rdwr new;
-		}
-	}
-}
-
-ram block $__GOWIN_DP_ {
-	abits 14;
-	widths 1 2 4 9 18 per_port;
-	cost 128;
-	init no_undef;
-	port srsw "A" "B" {
-		clock posedge;
-		clken;
-		option "RESET_MODE" "SYNC" {
-			rdsrst zero ungated;
-		}
-		option "RESET_MODE" "ASYNC" {
-			rdarst zero;
-		}
-		rdinit zero;
-		portoption "WRITE_MODE" 0 {
-			rdwr no_change;
-		}
-		portoption "WRITE_MODE" 1 {
-			rdwr new;
-		}
-	}
-}
-
-ram block $__GOWIN_SDP_ {
-	abits 14;
-	widths 1 2 4 9 18 36 per_port;
-	cost 128;
-	init no_undef;
-	port sr "R" {
-		clock posedge;
-		clken;
-		option "RESET_MODE" "SYNC" {
-			rdsrst zero ungated;
-		}
-		option "RESET_MODE" "ASYNC" {
-			rdarst zero;
-		}
-		rdinit zero;
-	}
-	port sw "W" {
-		clock posedge;
-		clken;
-	}
-}
diff --git a/techlibs/gowin/synth_gowin.cc b/techlibs/gowin/synth_gowin.cc
index 4e925daab..b9902659c 100644
--- a/techlibs/gowin/synth_gowin.cc
+++ b/techlibs/gowin/synth_gowin.cc
@@ -263,7 +263,7 @@ struct SynthGowinPass : public ScriptPass
 				if (nolutram)
 					args += " -no-auto-distributed";
 			}
-			run(stringf("memory_libmap -lib +/gowin/lutrams.txt -lib +/gowin/brams%s.txt", family == "gw5a" ? "_gw5a" : "") + args, "(-no-auto-block if -nobram, -no-auto-distributed if -nolutram)");
+			run(stringf("memory_libmap -lib +/gowin/lutrams.txt -lib +/gowin/brams.txt -D %s", family) + args, "(-no-auto-block if -nobram, -no-auto-distributed if -nolutram)");
 			run(stringf("techmap -map +/gowin/lutrams_map.v -map +/gowin/brams_map%s.v", family == "gw5a" ? "_gw5a" : ""));
 		}