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Fix wreduce call (!!!), tweak muxcover costs

This commit is contained in:
Eddie Hung 2019-06-21 18:12:07 -07:00
parent 6c2cb51996
commit 39e0e006d5
1 changed files with 6 additions and 5 deletions
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11
techlibs/xilinx/synth_xilinx.cc
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@ -229,7 +229,7 @@ struct SynthXilinxPass : public ScriptPass
if (help_mode)
run("wreduce [c:* t:$mux %d]", "(no selection if -nomux)");
else
run("wreduce" + nomux ? "" : " c:* t:$mux %d");
run("wreduce" + std::string(nomux ? "" : " c:* t:$mux %d"));
run("peepopt");
run("opt_clean");
run("alumacc");
@ -271,10 +271,11 @@ struct SynthXilinxPass : public ScriptPass
run("dffsr2dff");
run("dff2dffe");
if (!nomux || help_mode) {
run("simplemap t:$mux", " (skip if -nomux)");
// FIXME: Must specify mux4, even if we don't need it,
// otherwise it will use mux8 as mux4
run("muxcover -mux4=150 -mux8=200 -mux16=250 -dmux=0", "(skip if -nomux)");
run("simplemap t:$mux", " (skip if -nomux)");
// 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
run("muxcover -mux8=350 -mux16=400 -dmux=0", "(skip if -nomux)");
}
run("opt -full");