diff options
Diffstat (limited to 'passes/opt/opt_lut.cc')
| -rw-r--r-- | passes/opt/opt_lut.cc | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/passes/opt/opt_lut.cc b/passes/opt/opt_lut.cc index 587ef878a..4c199ba72 100644 --- a/passes/opt/opt_lut.cc +++ b/passes/opt/opt_lut.cc @@ -101,6 +101,12 @@ struct OptLutWorker { if (cell->type == "$lut") { + if (cell->has_keep_attr()) + continue; + SigBit lut_output = cell->getPort("\\Y"); + if (lut_output.wire->get_bool_attribute("\\keep")) + continue; + int lut_width = cell->getParam("\\WIDTH").as_int(); SigSpec lut_input = cell->getPort("\\A"); int lut_arity = 0; |