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Error out on latches.

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This commit is contained in:
nella 2026-06-17 17:36:32 +02:00
parent 1023361d6c
commit b2d688dbf9
14 changed files with 149 additions and 37 deletions
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22
techlibs/efinix/synth_efinix.cc
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@ -63,13 +63,19 @@ struct SynthEfinixPass : public ScriptPass
log(" -nobram\n");
log(" do not use EFX_RAM_5K cells in output netlist\n");
log("\n");
log(" -latches <auto|warn|error>\n");
log(" select the behaviour for latches that cannot be mapped to a\n");
log(" dedicated hardware primitive and are implemented using LUTs\n");
log(" instead. 'error' (the default) aborts synthesis, 'warn' only\n");
log(" prints a warning, and 'auto' permits them without complaint.\n");
log("\n");
log("\n");
log("The following commands are executed by this synthesis command:\n");
help_script();
log("\n");
}
string top_opt, edif_file, json_file;
string top_opt, edif_file, json_file, latches;
bool flatten, retime, nobram;
void clear_flags() override
@ -80,6 +86,7 @@ struct SynthEfinixPass : public ScriptPass
flatten = true;
retime = false;
nobram = false;
latches = "error";
}
void execute(std::vector<std::string> args, RTLIL::Design *design) override
@ -122,12 +129,18 @@ struct SynthEfinixPass : public ScriptPass
nobram = true;
continue;
}
if (args[argidx] == "-latches" && argidx+1 < args.size()) {
latches = args[++argidx];
continue;
}
break;
}
extra_args(args, argidx, design);
if (!design->full_selection())
log_cmd_error("This command only operates on fully selected designs!\n");
if (latches != "auto" && latches != "warn" && latches != "error")
log_cmd_error("Invalid value '%s' for -latches (expected auto, warn or error)\n", latches.c_str());
log_header(design, "Executing SYNTH_EFINIX pass.\n");
log_push();
@ -147,7 +160,7 @@ struct SynthEfinixPass : public ScriptPass
if (flatten && check_label("flatten", "(unless -noflatten)"))
{
run("proc");
run("proc -latches " + (latches == "error" ? std::string("auto") : latches));
run("check");
run("flatten");
run("tribuf -logic");
@ -190,7 +203,10 @@ struct SynthEfinixPass : public ScriptPass
if (check_label("map_ffs"))
{
run("dfflegalize -cell $_DFFE_????_ 0 -cell $_SDFFE_????_ 0 -cell $_SDFFCE_????_ 0 -cell $_DLATCH_?_ x");
run("check -nolatches");
if (help_mode)
run("select -assert-none t:$_DLATCH_* t:$_DLATCHSR_*", "(only if -latches error, the default)");
else if (latches == "error")
run("select -assert-none t:$_DLATCH_* t:$_DLATCHSR_*");
run("techmap -D NO_LUT -map +/efinix/cells_map.v");
run("opt_expr -mux_undef");
run("simplemap");