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synth_ice40: add -relut option, to run ice40_unlut and opt_lut.

This commit is contained in:
whitequark 2018-12-05 00:28:03 +00:00
parent 9e072ec21f
commit ea4870b126
1 changed files with 13 additions and 1 deletions
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14
techlibs/ice40/synth_ice40.cc
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@ -63,6 +63,9 @@ struct SynthIce40Pass : public ScriptPass
log(" -retime\n"); log(" -retime\n");
log(" run 'abc' with -dff option\n"); log(" run 'abc' with -dff option\n");
log("\n"); log("\n");
log(" -relut\n");
log(" combine LUTs after synthesis\n");
log("\n");
log(" -nocarry\n"); log(" -nocarry\n");
log(" do not use SB_CARRY cells in output netlist\n"); log(" do not use SB_CARRY cells in output netlist\n");
log("\n"); log("\n");
@ -90,7 +93,7 @@ struct SynthIce40Pass : public ScriptPass
} }
string top_opt, blif_file, edif_file, json_file; string top_opt, blif_file, edif_file, json_file;
bool nocarry, nodffe, nobram, flatten, retime, abc2, vpr; bool nocarry, nodffe, nobram, flatten, retime, relut, abc2, vpr;
int min_ce_use; int min_ce_use;
void clear_flags() YS_OVERRIDE void clear_flags() YS_OVERRIDE
@ -105,6 +108,7 @@ struct SynthIce40Pass : public ScriptPass
nobram = false; nobram = false;
flatten = true; flatten = true;
retime = false; retime = false;
relut = false;
abc2 = false; abc2 = false;
vpr = false; vpr = false;
} }
@ -153,6 +157,10 @@ struct SynthIce40Pass : public ScriptPass
retime = true; retime = true;
continue; continue;
} }
if (args[argidx] == "-relut") {
relut = true;
continue;
}
if (args[argidx] == "-nocarry") { if (args[argidx] == "-nocarry") {
nocarry = true; nocarry = true;
continue; continue;
@ -259,6 +267,10 @@ struct SynthIce40Pass : public ScriptPass
run("techmap -map +/ice40/latches_map.v"); run("techmap -map +/ice40/latches_map.v");
run("abc -lut 4"); run("abc -lut 4");
run("clean"); run("clean");
if (relut || help_mode) {
run("ice40_unlut", "(only if -relut)");
run("opt_lut", " (only if -relut)");
}
} }
if (check_label("map_cells")) if (check_label("map_cells"))