riscv
/
yosys
mirror of https://github.com/YosysHQ/yosys.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Prefer non-inverted clocks in dfflibmap

This commit is contained in:
Clifford Wolf 2013-12-19 13:21:57 +01:00
parent 994c83db01
commit c904f5e197
1 changed files with 8 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
passes/techmap/dfflibmap.cc
View File

@ -473,17 +473,19 @@ struct DfflibmapPass : public Pass {
find_cell_sr(libparser.ast, "$_DFFSR_PPN_", true, true, false);
find_cell_sr(libparser.ast, "$_DFFSR_PPP_", true, true, true);
bool keep_running = true;
while (keep_running) {
bool keep_running;
do {
keep_running = false;
keep_running |= expand_cellmap("$_DFF_*_", "C");
keep_running |= expand_cellmap("$_DFF_*??_", "C");
keep_running |= expand_cellmap("$_DFF_?*?_", "R");
keep_running |= expand_cellmap("$_DFF_??*_", "DQ");
keep_running |= expand_cellmap("$_DFFSR_*??_", "C");
keep_running |= expand_cellmap("$_DFFSR_?*?_", "S");
keep_running |= expand_cellmap("$_DFFSR_??*_", "R");
}
} while (keep_running);
do {
keep_running |= expand_cellmap("$_DFF_*_", "C");
keep_running |= expand_cellmap("$_DFF_*??_", "C");
keep_running |= expand_cellmap("$_DFFSR_*??_", "C");
} while (keep_running);
map_sr_to_arst("$_DFFSR_NNN_", "$_DFF_NN0_");
map_sr_to_arst("$_DFFSR_NNN_", "$_DFF_NN1_");