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| author | Eddie Hung <eddie@fpgeh.com> | 2019-08-23 16:41:32 -0700 |
|---|---|---|
| committer | Eddie Hung <eddie@fpgeh.com> | 2019-08-23 16:41:32 -0700 |
| commit | d7051b90de19ba0faed0a4eff4af7c3bc92dd3fd (patch) | |
| tree | 88dd36f645b36c31b98e8fa15236968162b0bb47 /techlibs/xilinx | |
| parent | 509c353fe981c95ca667a637bf2b47477962a60b (diff) | |
| download | yosys-d7051b90de19ba0faed0a4eff4af7c3bc92dd3fd.tar.gz yosys-d7051b90de19ba0faed0a4eff4af7c3bc92dd3fd.tar.bz2 yosys-d7051b90de19ba0faed0a4eff4af7c3bc92dd3fd.zip | |
Add undocumented feature
Diffstat (limited to 'techlibs/xilinx')
| -rw-r--r-- | techlibs/xilinx/synth_xilinx.cc | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/techlibs/xilinx/synth_xilinx.cc b/techlibs/xilinx/synth_xilinx.cc index 7ba67409b..87f4af8f7 100644 --- a/techlibs/xilinx/synth_xilinx.cc +++ b/techlibs/xilinx/synth_xilinx.cc @@ -105,6 +105,7 @@ struct SynthXilinxPass : public ScriptPass std::string top_opt, edif_file, blif_file, family; bool flatten, retime, vpr, nobram, nolutram, nosrl, nocarry, nowidelut, abc9; + bool flatten_before_abc; int widemux; void clear_flags() YS_OVERRIDE @@ -123,6 +124,7 @@ struct SynthXilinxPass : public ScriptPass nocarry = false; nowidelut = false; abc9 = false; + flatten_before_abc = false; widemux = 0; } @@ -162,6 +164,10 @@ struct SynthXilinxPass : public ScriptPass flatten = true; continue; } + if (args[argidx] == "-flatten_before_abc") { + flatten_before_abc = true; + continue; + } if (args[argidx] == "-retime") { retime = true; continue; @@ -385,6 +391,8 @@ struct SynthXilinxPass : public ScriptPass if (check_label("map_luts")) { run("opt_expr -mux_undef"); + if (flatten_before_abc) + run("flatten"); if (help_mode) run("abc -luts 2:2,3,6:5[,10,20] [-dff]", "(option for 'nowidelut', option for '-retime')"); else if (abc9) { |