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mirror of synced 2026-05-19 20:27:38 +00:00
Code Issues Releases Wiki Activity

Add csa to synth.

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This commit is contained in:
nella
2026-03-16 15:39:54 +01:00
parent 4b037bda7a
commit 18c7cb094e
1 changed files with 13 additions and 3 deletions
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16
techlibs/common/synth.cc
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@@ -67,6 +67,10 @@ struct SynthPass : public ScriptPass {
log(" -booth\n");
log(" run the booth pass to map $mul to Booth encoded multipliers\n");
log("\n");
log(" -csa\n");
log(" run the csa_tree pass to convert $add/$sub chains to\n");
log(" carry-save adder trees.\n");
log("\n");
log(" -noalumacc\n");
log(" do not run 'alumacc' pass. i.e. keep arithmetic operators in\n");
log(" their direct form ($add, $sub, etc.).\n");
@@ -108,7 +112,7 @@ struct SynthPass : public ScriptPass {
}
string top_module, fsm_opts, memory_opts, abc;
bool autotop, flatten, noalumacc, nofsm, noabc, noshare, flowmap, booth, hieropt, relative_share;
bool autotop, flatten, noalumacc, nofsm, noabc, noshare, flowmap, booth, csa, hieropt, relative_share;
int lut;
std::vector<std::string> techmap_maps;
@@ -127,6 +131,7 @@ struct SynthPass : public ScriptPass {
noshare = false;
flowmap = false;
booth = false;
csa = false;
hieropt = false;
relative_share = false;
abc = "abc";
@@ -187,7 +192,10 @@ struct SynthPass : public ScriptPass {
booth = true;
continue;
}
if (args[argidx] == "-csa") {
csa = true;
continue;
}
if (args[argidx] == "-nordff") {
memory_opts += " -nordff";
continue;
@@ -287,6 +295,8 @@ struct SynthPass : public ScriptPass {
run(stringf("%s -map +/cmp2lut.v -map +/cmp2lcu.v -D LUT_WIDTH=%d", techmap_cmd, lut));
if (booth || help_mode)
run("booth", " (if -booth)");
if (csa || help_mode)
run("csa_tree", " (if -csa)");
if (!noalumacc)
run("alumacc", " (unless -noalumacc)");
if (!noshare)
@@ -301,7 +311,7 @@ struct SynthPass : public ScriptPass {
run("memory_map");
run("opt -full");
if (help_mode) {
run(techmap_cmd, " (unless -extra-map)");
run(techmap_cmd, " (unless -extra-map)");
run(techmap_cmd + " -map +/techmap.v -map <inject>", " (if -extra-map)");
} else {
std::string techmap_opts;