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

Using "mfs" and "lutpack" in ABC lut mapping

This commit is contained in:
Clifford Wolf 2016-03-07 11:14:11 +01:00
parent c89f61c730
commit c4aaed099f
1 changed files with 14 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
passes/techmap/abc.cc
View File

@ -31,7 +31,7 @@
#define ABC_COMMAND_LIB "strash; scorr; ifraig; retime {D}; strash; dch -f; map {D}"
#define ABC_COMMAND_CTR "strash; scorr; ifraig; retime {D}; strash; dch -f; map {D}; buffer; upsize {D}; dnsize {D}; stime -p"
#define ABC_COMMAND_LUT "strash; scorr; ifraig; retime; strash; dch -f; if"
#define ABC_COMMAND_LUT "strash; scorr; ifraig; retime; strash; dch -f; if; mfs"
#define ABC_COMMAND_DFL "strash; scorr; ifraig; retime; strash; dch -f; map"
#define ABC_FAST_COMMAND_LIB "retime {D}; map {D}"
@ -642,9 +642,15 @@ void abc_module(RTLIL::Design *design, RTLIL::Module *current_module, std::strin
abc_script += script_file[i];
} else
abc_script += stringf("source %s", script_file.c_str());
} else if (!lut_costs.empty())
} else if (!lut_costs.empty()) {
bool all_luts_cost_same = true;
for (int this_cost : lut_costs)
if (this_cost != lut_costs.front())
all_luts_cost_same = false;
abc_script += fast_mode ? ABC_FAST_COMMAND_LUT : ABC_COMMAND_LUT;
else if (!liberty_file.empty())
if (all_luts_cost_same && !fast_mode)
abc_script += "; lutpack";
} else if (!liberty_file.empty())
abc_script += constr_file.empty() ? (fast_mode ? ABC_FAST_COMMAND_LIB : ABC_COMMAND_LIB) : (fast_mode ? ABC_FAST_COMMAND_CTR : ABC_COMMAND_CTR);
else
abc_script += fast_mode ? ABC_FAST_COMMAND_DFL : ABC_COMMAND_DFL;
@ -1186,7 +1192,10 @@ struct AbcPass : public Pass {
log(" for -liberty with -constr:\n");
log("%s\n", fold_abc_cmd(ABC_COMMAND_CTR).c_str());
log("\n");
log(" for -lut:\n");
log(" for -lut/-luts (only one LUT size):\n");
log("%s\n", fold_abc_cmd(ABC_COMMAND_LUT "; lutpack").c_str());
log("\n");
log(" for -lut/-luts (different LUT sizes):\n");
log("%s\n", fold_abc_cmd(ABC_COMMAND_LUT).c_str());
log("\n");
log(" otherwise:\n");
@ -1202,7 +1211,7 @@ struct AbcPass : public Pass {
log(" for -liberty with -constr:\n");
log("%s\n", fold_abc_cmd(ABC_FAST_COMMAND_CTR).c_str());
log("\n");
log(" for -lut:\n");
log(" for -lut/-luts:\n");
log("%s\n", fold_abc_cmd(ABC_FAST_COMMAND_LUT).c_str());
log("\n");
log(" otherwise:\n");