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Gowin. Disable unsupported BSRAM mode in GW5A

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All supported (and planned to be supported) GW5A series chips do not
support the 2: Read-before-Write write mode.

Here, we prohibit the generation of BSRAM with this mode.

Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
This commit is contained in:
YRabbit 2025-10-21 12:36:06 +10:00 • committed by Lofty
parent 2613c1c0a9
commit 64700dec65
3 changed files with 71 additions and 1 deletions
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2
techlibs/gowin/synth_gowin.cc
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@ -263,7 +263,7 @@ struct SynthGowinPass : public ScriptPass
if (nolutram)
args += " -no-auto-distributed";
}
run("memory_libmap -lib +/gowin/lutrams.txt -lib +/gowin/brams.txt" + args, "(-no-auto-block if -nobram, -no-auto-distributed if -nolutram)");
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("techmap -map +/gowin/lutrams_map.v -map +/gowin/brams_map%s.v", family == "gw5a" ? "_gw5a" : ""));
}