riscv
/
yosys
mirror of https://github.com/YosysHQ/yosys.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Rework help_mode for synth_xilinx -widemux

This commit is contained in:
Eddie Hung 2019-06-26 17:41:21 -07:00
parent da870e62d9
commit cae69a3edd
1 changed files with 23 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
techlibs/xilinx/synth_xilinx.cc
View File

@ -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");