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| author | Clifford Wolf <clifford@clifford.at> | 2019-04-20 02:03:44 +0200 |
|---|---|---|
| committer | Clifford Wolf <clifford@clifford.at> | 2019-04-20 02:03:44 +0200 |
| commit | b3a3e08e389c8d10fbd8e0dc8b48e1e559dedf5d (patch) | |
| tree | 80bb8dd2e095baf93e5a591f58209f174ec18d8a /passes/opt | |
| parent | e06d158e8a3ae3626fbf82b3a8c6764f05111513 (diff) | |
| download | yosys-b3a3e08e389c8d10fbd8e0dc8b48e1e559dedf5d.tar.gz yosys-b3a3e08e389c8d10fbd8e0dc8b48e1e559dedf5d.tar.bz2 yosys-b3a3e08e389c8d10fbd8e0dc8b48e1e559dedf5d.zip | |
Improve "pmux2shiftx"
Signed-off-by: Clifford Wolf <clifford@clifford.at>
Diffstat (limited to 'passes/opt')
| -rw-r--r-- | passes/opt/pmux2shiftx.cc | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/passes/opt/pmux2shiftx.cc b/passes/opt/pmux2shiftx.cc index dbcdff3d8..4cd061c68 100644 --- a/passes/opt/pmux2shiftx.cc +++ b/passes/opt/pmux2shiftx.cc @@ -33,9 +33,9 @@ struct Pmux2ShiftxPass : public Pass { log("\n"); log("This pass transforms $pmux cells to $shiftx cells.\n"); log("\n"); - log(" -min_density <non_offset_percentage> <offset_percentage>\n"); - log(" specifies the minimum density for non_offset- and for offset-mode\n"); - log(" default values are 30 (non-offset) and 50 (offset)\n"); + log(" -min_density <percentage>\n"); + log(" specifies the minimum density for the shifter\n"); + log(" default: 50\n"); log("\n"); log(" -min_choices <int>\n"); log(" specified the minimum number of choices for a control signal\n"); @@ -48,8 +48,7 @@ struct Pmux2ShiftxPass : public Pass { } void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE { - int min_non_offset_percentage = 30; - int min_offset_percentage = 50; + int min_density = 50; int min_choices = 3; bool allow_onehot = false; @@ -57,9 +56,8 @@ struct Pmux2ShiftxPass : public Pass { size_t argidx; for (argidx = 1; argidx < args.size(); argidx++) { - if (args[argidx] == "-min_density" && argidx+2 < args.size()) { - min_non_offset_percentage = atoi(args[++argidx].c_str()); - min_offset_percentage = atoi(args[++argidx].c_str()); + if (args[argidx] == "-min_density" && argidx+1 < args.size()) { + min_density = atoi(args[++argidx].c_str()); continue; } if (args[argidx] == "-min_choices" && argidx+1 < args.size()) { @@ -369,7 +367,7 @@ struct Pmux2ShiftxPass : public Pass { // check density percentages Const offset(State::S0, GetSize(sig)); - if (absolute_density < min_non_offset_percentage && range_density >= min_offset_percentage) + if (absolute_density < min_density && range_density >= min_density) { offset = Const(min_choice, GetSize(sig)); log(" offset: %s\n", log_signal(offset)); @@ -382,7 +380,7 @@ struct Pmux2ShiftxPass : public Pass { new_perm_choices[const_sub(it.first, offset, false, false, GetSize(sig))] = it.second; perm_choices.swap(new_perm_choices); } else - if (absolute_density < min_non_offset_percentage) { + if (absolute_density < min_density) { log(" insufficient density.\n"); seldb.erase(sig); continue; |