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gowin: synth_gowin: Add -nodsp option

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This commit is contained in:
Maxim Kudinov 2026-02-12 13:57:34 +03:00
parent 542b29fa6a
commit 5b94a97fb3
1 changed files with 12 additions and 4 deletions
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16
techlibs/gowin/synth_gowin.cc
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@ -112,13 +112,16 @@ struct SynthGowinPass : public ScriptPass
log(" -setundef\n");
log(" set undriven wires and parameters to zero\n");
log("\n");
log(" -nodsp\n");
log(" do not infer DSP multipliers\n");
log("\n");
log("The following commands are executed by this synthesis command:\n");
help_script();
log("\n");
}
string top_opt, vout_file, json_file, family;
bool retime, nobram, nolutram, flatten, nodffe, strict_gw5a_dffs, nowidelut, abc9, noiopads, noalu, no_rw_check, setundef;
bool retime, nobram, nolutram, flatten, nodffe, strict_gw5a_dffs, nowidelut, abc9, noiopads, noalu, no_rw_check, setundef, nodsp;
void clear_flags() override
{
@ -138,6 +141,7 @@ struct SynthGowinPass : public ScriptPass
noalu = false;
no_rw_check = false;
setundef = false;
nodsp = false;
}
void execute(std::vector<std::string> args, RTLIL::Design *design) override
@ -224,6 +228,10 @@ struct SynthGowinPass : public ScriptPass
setundef = true;
continue;
}
if (args[argidx] == "-nodsp") {
nodsp = true;
continue;
}
break;
}
extra_args(args, argidx, design);
@ -273,9 +281,9 @@ struct SynthGowinPass : public ScriptPass
run("share");
if (help_mode) {
run("techmap -map +/mul2dsp.v [...]", "(if -family gw1n or gw2a)");
run("techmap -map +/gowin/dsp_map.v", "(if -family gw1n or gw2a)");
} else if (family == "gw1n" || family == "gw2a") {
run("techmap -map +/mul2dsp.v [...]", "(unless -nodsp and if -family gw1n or gw2a)");
run("techmap -map +/gowin/dsp_map.v", "(unless -nodsp and if -family gw1n or gw2a)");
} else if (!nodsp && (family == "gw1n" || family == "gw2a")) {
for (const auto &rule : dsp_rules) {
run(stringf("techmap -map +/mul2dsp.v -D DSP_A_MAXWIDTH=%d -D DSP_B_MAXWIDTH=%d -D DSP_A_MINWIDTH=%d -D DSP_B_MINWIDTH=%d -D DSP_NAME=%s",
rule.a_maxwidth, rule.b_maxwidth, rule.a_minwidth, rule.b_minwidth, rule.prim));