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| author | Bogdan Vukobratovic <bogdan.vukobratovic@gmail.com> | 2019-05-28 08:48:21 +0200 |
|---|---|---|
| committer | Bogdan Vukobratovic <bogdan.vukobratovic@gmail.com> | 2019-05-28 08:48:21 +0200 |
| commit | 9a468f81c412f8b63d25e739f28932815c6882fb (patch) | |
| tree | d49e79388b32a59c24d40b600f551fc682648d82 /passes/sat | |
| parent | 92dde319fc603223304a64a5a49bbbe6c1ec3045 (diff) | |
| download | yosys-9a468f81c412f8b63d25e739f28932815c6882fb.tar.gz yosys-9a468f81c412f8b63d25e739f28932815c6882fb.tar.bz2 yosys-9a468f81c412f8b63d25e739f28932815c6882fb.zip | |
Optimizing DFFs whose initial value prevents their value from changing
This is a proof of concept implementation that invokes SAT solver via Pass::call
method.
Diffstat (limited to 'passes/sat')
| -rw-r--r-- | passes/sat/sat.cc | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/passes/sat/sat.cc b/passes/sat/sat.cc index cbba738f0..453ae8cca 100644 --- a/passes/sat/sat.cc +++ b/passes/sat/sat.cc @@ -1548,6 +1548,7 @@ struct SatPass : public Pass { print_proof_failed(); tip_failed: + design->scratchpad_set_bool("sat.success", false); if (verify) { log("\n"); log_error("Called with -verify and proof did fail!\n"); @@ -1555,6 +1556,7 @@ struct SatPass : public Pass { if (0) tip_success: + design->scratchpad_set_bool("sat.success", true); if (falsify) { log("\n"); log_error("Called with -falsify and proof did succeed!\n"); @@ -1628,6 +1630,7 @@ struct SatPass : public Pass { if (sathelper.solve()) { + design->scratchpad_set_bool("sat.success", false); if (max_undef) { log("SAT model found. maximizing number of undefs.\n"); sathelper.maximize_undefs(); @@ -1667,6 +1670,7 @@ struct SatPass : public Pass { } else { + design->scratchpad_set_bool("sat.success", true); if (sathelper.gotTimeout) goto timeout; if (rerun_counter) |