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| author | Claire Wolf <claire@symbioticeda.com> | 2020-06-09 15:54:14 +0200 |
|---|---|---|
| committer | Claire Wolf <claire@symbioticeda.com> | 2020-06-09 15:54:14 +0200 |
| commit | 3c7122c3788a05d90423f22ec03f97c39da2da0b (patch) | |
| tree | 8d1c6075a45cb77b5cb4cc49c81efdb7e1939c34 /passes/opt | |
| parent | 9a2cf5e3db15218af9a5320a8ca1a7f190aa236b (diff) | |
| download | yosys-3c7122c3788a05d90423f22ec03f97c39da2da0b.tar.gz yosys-3c7122c3788a05d90423f22ec03f97c39da2da0b.tar.bz2 yosys-3c7122c3788a05d90423f22ec03f97c39da2da0b.zip | |
Do not optimize away FFs in "prep" and Verific fron-end
Signed-off-by: Claire Wolf <claire@symbioticeda.com>
Diffstat (limited to 'passes/opt')
| -rw-r--r-- | passes/opt/opt.cc | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/passes/opt/opt.cc b/passes/opt/opt.cc index 396819883..b852e6ae8 100644 --- a/passes/opt/opt.cc +++ b/passes/opt/opt.cc @@ -44,8 +44,8 @@ struct OptPass : public Pass { log(" opt_muxtree\n"); log(" opt_reduce [-fine] [-full]\n"); log(" opt_merge [-share_all]\n"); - log(" opt_share (-full only)\n"); - log(" opt_rmdff [-keepdc] [-sat]\n"); + log(" opt_share (-full only)\n"); + log(" opt_rmdff [-keepdc] [-sat] (except when called with -noff)\n"); log(" opt_clean [-purge]\n"); log(" opt_expr [-mux_undef] [-mux_bool] [-undriven] [-clkinv] [-fine] [-full] [-keepdc]\n"); log(" while <changed design>\n"); @@ -55,7 +55,7 @@ struct OptPass : public Pass { log(" do\n"); log(" opt_expr [-mux_undef] [-mux_bool] [-undriven] [-clkinv] [-fine] [-full] [-keepdc]\n"); log(" opt_merge [-share_all]\n"); - log(" opt_rmdff [-keepdc] [-sat]\n"); + log(" opt_rmdff [-keepdc] [-sat] (except when called with -noff)\n"); log(" opt_clean [-purge]\n"); log(" while <changed design in opt_rmdff>\n"); log("\n"); @@ -73,6 +73,7 @@ struct OptPass : public Pass { std::string opt_rmdff_args; bool opt_share = false; bool fast_mode = false; + bool noff_mode = false; log_header(design, "Executing OPT pass (performing simple optimizations).\n"); log_push(); @@ -127,6 +128,10 @@ struct OptPass : public Pass { fast_mode = true; continue; } + if (args[argidx] == "-noff") { + noff_mode = true; + continue; + } break; } extra_args(args, argidx, design); @@ -137,7 +142,8 @@ struct OptPass : public Pass { Pass::call(design, "opt_expr" + opt_expr_args); Pass::call(design, "opt_merge" + opt_merge_args); design->scratchpad_unset("opt.did_something"); - Pass::call(design, "opt_rmdff" + opt_rmdff_args); + if (!noff_mode) + Pass::call(design, "opt_rmdff" + opt_rmdff_args); if (design->scratchpad_get_bool("opt.did_something") == false) break; Pass::call(design, "opt_clean" + opt_clean_args); @@ -156,7 +162,8 @@ struct OptPass : public Pass { Pass::call(design, "opt_merge" + opt_merge_args); if (opt_share) Pass::call(design, "opt_share"); - Pass::call(design, "opt_rmdff" + opt_rmdff_args); + if (!noff_mode) + Pass::call(design, "opt_rmdff" + opt_rmdff_args); Pass::call(design, "opt_clean" + opt_clean_args); Pass::call(design, "opt_expr" + opt_expr_args); if (design->scratchpad_get_bool("opt.did_something") == false) |