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abc: new option to pass extra ABC read_lib args #5721

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Merged
Goubermouche merged 6 commits into from
May 8, 2026
+23 −3
Merged

abc: new option to pass extra ABC read_lib args #5721

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750d536
abc: new option to pass ABC read_lib args
tefantasy Mar 4, 2026
f8a50e7
Merge commit 'ab316c14d2c3f950eda7672e5c5507bb5219205a' into abc-libe…
tefantasy May 7, 2026
cb62095
abc: disable scl merge if extra read_lib args provided
tefantasy May 7, 2026
10dc0d4
Merge branch 'main' into abc-liberty-args
Goubermouche May 7, 2026
3f354eb
abc: update log for extra read_lib args
tefantasy May 7, 2026
3f68ee8
Merge branch 'main' into abc-liberty-args
Goubermouche May 8, 2026
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26 changes: 23 additions & 3 deletions passes/techmap/abc.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -131,6 +131,7 @@ struct AbcConfig
std::vector<std::string> liberty_files;
std::vector<std::string> genlib_files;
std::string constr_file;
std::string abc_liberty_args;
vector<int> lut_costs;
std::string delay_target;
std::string sop_inputs;
Expand Down Expand Up @@ -1030,14 +1031,21 @@ void AbcModuleState::prepare_module(RTLIL::Design *design, RTLIL::Module *module
run_abc.dont_use_args += stringf("-X \"%s\" ", dont_use_cell);
}

std::string merged_scl = convert_liberty_files_to_merged_scl(config.liberty_files, run_abc.dont_use_args, config.exe_file);
std::string merged_scl;
if (config.abc_liberty_args.empty()) {
merged_scl = convert_liberty_files_to_merged_scl(config.liberty_files, run_abc.dont_use_args, config.exe_file);
}
if (!merged_scl.empty()) {
run_abc.abc_script += stringf("read_scl \"%s\" ; ", merged_scl.c_str());
} else if(!config.liberty_files.empty()) {
log_warning("ABC: Merged scl conversion failed, using liberty format\n");
if (!config.abc_liberty_args.empty()) {
log("ABC: abc_liberty_args provided, using liberty format\n");
} else {
log_warning("ABC: Merged scl conversion failed, using liberty format\n");
}
bool first_lib = true;
for (std::string liberty_file : config.liberty_files) {
run_abc.abc_script += stringf("read_lib %s %s -w \"%s\" ; ", run_abc.dont_use_args, first_lib ? "" : "-m", liberty_file);
run_abc.abc_script += stringf("read_lib %s %s %s -w \"%s\" ; ", run_abc.dont_use_args, first_lib ? "" : "-m", config.abc_liberty_args, liberty_file);
first_lib = false;
}
}
Expand Down Expand Up @@ -2035,6 +2043,10 @@ struct AbcPass : public Pass {
log(" preserve naming by an equivalence check between the original and\n");
log(" post-ABC netlists (experimental).\n");
log("\n");
log(" -liberty_args <string>\n");
log(" when -liberty is used, also pass the specified arguments to ABC\n");
log(" command \"read_lib\". Example: -liberty_args \"-G 250\"\n");
log("\n");
log("When no target cell library is specified the Yosys standard cell library is\n");
log("loaded into ABC before the ABC script is executed.\n");
log("\n");
Expand Down Expand Up @@ -2217,6 +2229,14 @@ struct AbcPass : public Pass {
config.markgroups = true;
continue;
}
if (arg == "-liberty_args" && argidx+1 < args.size()) {
config.abc_liberty_args = args[++argidx];
if (!config.abc_liberty_args.empty()) {
if (config.abc_liberty_args[0] == '\"' && config.abc_liberty_args.back() == '\"')
config.abc_liberty_args = config.abc_liberty_args.substr(1, config.abc_liberty_args.size() - 2);
}
continue;
}
break;
}
extra_args(args, argidx, design);
Expand Down
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