diff options
Diffstat (limited to 'passes/opt')
| -rw-r--r-- | passes/opt/opt_const.cc | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/passes/opt/opt_const.cc b/passes/opt/opt_const.cc index d84910ee..a3f3ee41 100644 --- a/passes/opt/opt_const.cc +++ b/passes/opt/opt_const.cc @@ -160,6 +160,13 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons assert(a.chunks.size() == b.chunks.size()); for (size_t i = 0; i < a.chunks.size(); i++) { + if (a.chunks[i].wire == NULL && b.chunks[i].wire == NULL && + a.chunks[i].data.bits[0] != b.chunks[i].data.bits[0]) { + RTLIL::SigSpec new_y = RTLIL::SigSpec((cell->type == "$eq" || cell->type == "$eqx") ? RTLIL::State::S0 : RTLIL::State::S1); + new_y.extend(cell->parameters["\\Y_WIDTH"].as_int(), false); + replace_cell(module, cell, "empty", "\\Y", new_y); + goto next_cell; + } if (cell->type == "$eq" || cell->type == "$ne") { if (a.chunks[i].wire == NULL && a.chunks[i].data.bits[0] > RTLIL::State::S1) continue; @@ -173,7 +180,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons } if (new_a.width == 0) { - RTLIL::SigSpec new_y = RTLIL::SigSpec(cell->type == "$eq" ? RTLIL::State::S1 : RTLIL::State::S0); + RTLIL::SigSpec new_y = RTLIL::SigSpec((cell->type == "$eq" || cell->type == "$eqx") ? RTLIL::State::S1 : RTLIL::State::S0); new_y.extend(cell->parameters["\\Y_WIDTH"].as_int(), false); replace_cell(module, cell, "empty", "\\Y", new_y); goto next_cell; |