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Add undocumented feature

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This commit is contained in:
Eddie Hung 2019-08-23 16:41:32 -07:00
parent 509c353fe9
commit d7051b90de
1 changed files with 8 additions and 0 deletions
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8
techlibs/xilinx/synth_xilinx.cc
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@ -105,6 +105,7 @@ struct SynthXilinxPass : public ScriptPass
std::string top_opt, edif_file, blif_file, family; std::string top_opt, edif_file, blif_file, family;
bool flatten, retime, vpr, nobram, nolutram, nosrl, nocarry, nowidelut, abc9; bool flatten, retime, vpr, nobram, nolutram, nosrl, nocarry, nowidelut, abc9;
bool flatten_before_abc;
int widemux; int widemux;
void clear_flags() YS_OVERRIDE void clear_flags() YS_OVERRIDE
@ -123,6 +124,7 @@ struct SynthXilinxPass : public ScriptPass
nocarry = false; nocarry = false;
nowidelut = false; nowidelut = false;
abc9 = false; abc9 = false;
flatten_before_abc = false;
widemux = 0; widemux = 0;
} }
@ -162,6 +164,10 @@ struct SynthXilinxPass : public ScriptPass
flatten = true; flatten = true;
continue; continue;
} }
if (args[argidx] == "-flatten_before_abc") {
flatten_before_abc = true;
continue;
}
if (args[argidx] == "-retime") { if (args[argidx] == "-retime") {
retime = true; retime = true;
continue; continue;
@ -385,6 +391,8 @@ struct SynthXilinxPass : public ScriptPass
if (check_label("map_luts")) { if (check_label("map_luts")) {
run("opt_expr -mux_undef"); run("opt_expr -mux_undef");
if (flatten_before_abc)
run("flatten");
if (help_mode) if (help_mode)
run("abc -luts 2:2,3,6:5[,10,20] [-dff]", "(option for 'nowidelut', option for '-retime')"); run("abc -luts 2:2,3,6:5[,10,20] [-dff]", "(option for 'nowidelut', option for '-retime')");
else if (abc9) { else if (abc9) {