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Further improved dfflibmap cellmap exploration

This commit is contained in:
Clifford Wolf 2013-12-20 12:34:34 +01:00
parent 404bcc2d1e
commit eaf7d9675d
1 changed files with 18 additions and 14 deletions
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32
passes/techmap/dfflibmap.cc
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@ -473,20 +473,24 @@ 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;
do {
keep_running = false;
keep_running |= expand_cellmap("$_DFF_?*?_", "R");
keep_running |= expand_cellmap("$_DFF_??*_", "DQ");
keep_running |= expand_cellmap("$_DFFSR_?*?_", "S");
keep_running |= expand_cellmap("$_DFFSR_??*_", "R");
} while (keep_running);
do {
keep_running = false;
keep_running |= expand_cellmap("$_DFF_*_", "C");
keep_running |= expand_cellmap("$_DFF_*??_", "C");
keep_running |= expand_cellmap("$_DFFSR_*??_", "C");
} while (keep_running);
int level = 0;
while (level < 3) {
bool did_something = false;
switch (level) {
case 2:
did_something |= expand_cellmap("$_DFF_*_", "C");
did_something |= expand_cellmap("$_DFF_*??_", "C");
did_something |= expand_cellmap("$_DFFSR_*??_", "C");
case 1:
did_something |= expand_cellmap("$_DFF_??*_", "DQ");
case 0:
did_something |= expand_cellmap("$_DFF_?*?_", "R");
did_something |= expand_cellmap("$_DFFSR_?*?_", "S");
did_something |= expand_cellmap("$_DFFSR_??*_", "R");
}
if (!did_something)
level++;
}
map_sr_to_arst("$_DFFSR_NNN_", "$_DFF_NN0_");
map_sr_to_arst("$_DFFSR_NNN_", "$_DFF_NN1_");