mirrors/yosys
3
0
Fork 0
mirror of https://github.com/YosysHQ/yosys synced 2025-04-06 17:44:09 +00:00
Code Activity

opt_lut to ignore LUT cells, or those that drive bits, with (* keep *)

Browse source
This commit is contained in:
Eddie Hung 2019-08-07 13:12:28 -07:00
parent 3414ee1e3f
commit f69410daaf
1 changed files with 6 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
passes/opt/opt_lut.cc
View file

@ -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;