diff options
| -rw-r--r-- | techlibs/xilinx/synth_xilinx.cc | 45 |
1 files changed, 23 insertions, 22 deletions
diff --git a/techlibs/xilinx/synth_xilinx.cc b/techlibs/xilinx/synth_xilinx.cc index c139fb3c4..199d0737d 100644 --- a/techlibs/xilinx/synth_xilinx.cc +++ b/techlibs/xilinx/synth_xilinx.cc @@ -276,29 +276,30 @@ struct SynthXilinxPass : public ScriptPass run("memory_map"); run("dffsr2dff"); run("dff2dffe"); - if (widemux > 0 || help_mode) { - run("simplemap t:$mux", " ('-widemux' only)"); - if (widemux > 0 || help_mode) { - std::string muxcover_args = " -dmux=0"; - switch (widemux) { - // NB: Cost of mux2 is 100; mux8 should cost between 3 and 4 - // of those so that 4:1 muxes and below are implemented - // out of mux2s - case 5: muxcover_args += " -mux8=350 -mux16=400"; break; - case 6: muxcover_args += " -mux8=450 -mux16=500"; break; - case 7: muxcover_args += " -mux8=550 -mux16=600"; break; - case 8: muxcover_args += " -mux8=650 -mux16=700"; break; - case 9: muxcover_args += " -mux16=750"; break; - case 10: muxcover_args += " -mux16=850"; break; - case 11: muxcover_args += " -mux16=950"; break; - case 12: muxcover_args += " -mux16=1050"; break; - case 13: muxcover_args += " -mux16=1150"; break; - case 14: muxcover_args += " -mux16=1250"; break; - case 15: muxcover_args += " -mux16=1350"; break; - default: muxcover_args += " -mux16=1450"; break; - } - run("muxcover " + muxcover_args, "('-widemux' only)"); + if (help_mode) { + run("simplemap t:$mux", " ('-widemux' only)"); + run("muxcover -dmux=0 -mux8=<cost> -mux16=<cost>, ('-widemux' only)"); + } + else if (widemux > 0) { + std::string muxcover_args = " -dmux=0"; + switch (widemux) { + // NB: Cost of mux2 is 100; mux8 should cost between 3 and 4 + // of those so that 4:1 muxes and below are implemented + // out of mux2s + case 5: muxcover_args += " -mux8=350 -mux16=400"; break; + case 6: muxcover_args += " -mux8=450 -mux16=500"; break; + case 7: muxcover_args += " -mux8=550 -mux16=600"; break; + case 8: muxcover_args += " -mux8=650 -mux16=700"; break; + case 9: muxcover_args += " -mux16=750"; break; + case 10: muxcover_args += " -mux16=850"; break; + case 11: muxcover_args += " -mux16=950"; break; + case 12: muxcover_args += " -mux16=1050"; break; + case 13: muxcover_args += " -mux16=1150"; break; + case 14: muxcover_args += " -mux16=1250"; break; + case 15: muxcover_args += " -mux16=1350"; break; + default: muxcover_args += " -mux16=1450"; break; } + run("muxcover " + muxcover_args); } run("opt -full"); |