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Merge pull request #1164 from YosysHQ/eddie/muxcover_mux2 

Add muxcover -mux2=cost option
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Eddie Hung 2019-07-08 14:34:37 -07:00 committed by GitHub
parent 22334fea40 b5072256f2
commit ede1ef61c5
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1 changed files with 19 additions and 8 deletions
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27
passes/techmap/muxcover.cc
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@ -632,10 +632,15 @@ struct MuxcoverPass : public Pass {
log("Cover trees of $_MUX_ cells with $_MUX{4,8,16}_ cells\n");
log("\n");
log(" -mux4[=cost], -mux8[=cost], -mux16[=cost]\n");
log(" Use the specified types of MUXes (with optional integer costs). If none\n");
log(" of these options are given, the effect is the same as if all of them are.\n");
log(" Default costs: $_MUX_ = %d, $_MUX4_ = %d,\n", COST_MUX2, COST_MUX4);
log(" $_MUX8_ = %d, $_MUX16_ = %d\n", COST_MUX8, COST_MUX16);
log(" Cover $_MUX_ trees using the specified types of MUXes (with optional\n");
log(" integer costs). If none of these options are given, the effect is the\n");
log(" same as if all of them are.\n");
log(" Default costs: $_MUX4_ = %d, $_MUX8_ = %d, \n", COST_MUX4, COST_MUX8);
log(" $_MUX16_ = %d\n", COST_MUX16);
log("\n");
log(" -mux2=cost\n");
log(" Use the specified cost for $_MUX_ cells when making covering decisions.\n");
log(" Default cost: $_MUX_ = %d\n", COST_MUX2);
log("\n");
log(" -dmux=cost\n");
log(" Use the specified cost for $_MUX_ cells used in decoders.\n");
@ -661,6 +666,7 @@ struct MuxcoverPass : public Pass {
bool nodecode = false;
bool nopartial = false;
int cost_dmux = COST_DMUX;
int cost_mux2 = COST_MUX2;
int cost_mux4 = COST_MUX4;
int cost_mux8 = COST_MUX8;
int cost_mux16 = COST_MUX16;
@ -669,11 +675,15 @@ struct MuxcoverPass : public Pass {
for (argidx = 1; argidx < args.size(); argidx++)
{
const auto &arg = args[argidx];
if (arg.size() >= 6 && arg.substr(0,6) == "-mux2=") {
cost_mux2 = std::stoi(arg.substr(6));
continue;
}
if (arg.size() >= 5 && arg.substr(0,5) == "-mux4") {
use_mux4 = true;
if (arg.size() > 5) {
if (arg[5] != '=') break;
cost_mux4 = atoi(arg.substr(6).c_str());
cost_mux4 = std::stoi(arg.substr(6));
}
continue;
}
@ -681,7 +691,7 @@ struct MuxcoverPass : public Pass {
use_mux8 = true;
if (arg.size() > 5) {
if (arg[5] != '=') break;
cost_mux8 = atoi(arg.substr(6).c_str());
cost_mux8 = std::stoi(arg.substr(6));
}
continue;
}
@ -689,12 +699,12 @@ struct MuxcoverPass : public Pass {
use_mux16 = true;
if (arg.size() > 6) {
if (arg[6] != '=') break;
cost_mux16 = atoi(arg.substr(7).c_str());
cost_mux16 = std::stoi(arg.substr(7));
}
continue;
}
if (arg.size() >= 6 && arg.substr(0,6) == "-dmux=") {
cost_dmux = atoi(arg.substr(6).c_str());
cost_dmux = std::stoi(arg.substr(6));
continue;
}
if (arg == "-nodecode") {
@ -722,6 +732,7 @@ struct MuxcoverPass : public Pass {
worker.use_mux8 = use_mux8;
worker.use_mux16 = use_mux16;
worker.cost_dmux = cost_dmux;
worker.cost_mux2 = cost_mux2;
worker.cost_mux4 = cost_mux4;
worker.cost_mux8 = cost_mux8;
worker.cost_mux16 = cost_mux16;