From aa1eeda567d09e2d2ffd40cd008d0166d2910273 Mon Sep 17 00:00:00 2001
From: Eddie Hung <eddie@fpgeh.com>
Date: Mon, 24 Jun 2019 11:51:55 -0700
Subject: Modify costs for muxcover
---
techlibs/xilinx/synth_xilinx.cc | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
(limited to 'techlibs/xilinx/synth_xilinx.cc')
diff --git a/techlibs/xilinx/synth_xilinx.cc b/techlibs/xilinx/synth_xilinx.cc
index 2cf28fce1..a84f54e99 100644
--- a/techlibs/xilinx/synth_xilinx.cc
+++ b/techlibs/xilinx/synth_xilinx.cc
@@ -282,7 +282,21 @@ struct SynthXilinxPass : public ScriptPass
// 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
- std::string muxcover_args = " -dmux=0 -mux8=350 -mux16=400";
+ std::string muxcover_args = " -dmux=0";
+ switch (minmuxf) {
+ 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, "('-minmuxf' only)");
}
}
--
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