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Only sort leaves on non-ANDNOT/ORNOT cells

This commit is contained in:
Eddie Hung 2019-08-14 11:25:56 -07:00
parent e2797f1308
commit 5ec5f6dec7
1 changed files with 7 additions and 6 deletions
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13
passes/techmap/extract_fa.cc
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@ -153,11 +153,12 @@ struct ExtractFaWorker
} }
} }
void check_partition(SigBit root, pool<SigBit> &leaves) void check_partition(SigBit root, pool<SigBit> &leaves, IdString cell_type)
{ {
if (config.enable_ha && GetSize(leaves) == 2) if (config.enable_ha && GetSize(leaves) == 2)
{ {
leaves.sort(); if (!cell_type.in("$_ANDNOT_", "$_ORNOT_"))
leaves.sort();
SigBit A = SigSpec(leaves)[0]; SigBit A = SigSpec(leaves)[0];
SigBit B = SigSpec(leaves)[1]; SigBit B = SigSpec(leaves)[1];
@ -237,7 +238,7 @@ struct ExtractFaWorker
} }
} }
void find_partitions(SigBit root, pool<SigBit> &leaves, pool<pool<SigBit>> &cache, int maxdepth, int maxbreadth) void find_partitions(SigBit root, pool<SigBit> &leaves, pool<pool<SigBit>> &cache, int maxdepth, int maxbreadth, IdString cell_type)
{ {
if (cache.count(leaves)) if (cache.count(leaves))
return; return;
@ -248,7 +249,7 @@ struct ExtractFaWorker
// log("\n"); // log("\n");
cache.insert(leaves); cache.insert(leaves);
check_partition(root, leaves); check_partition(root, leaves, cell_type);
if (maxdepth == 0) if (maxdepth == 0)
return; return;
@ -270,7 +271,7 @@ struct ExtractFaWorker
if (GetSize(new_leaves) > maxbreadth) if (GetSize(new_leaves) > maxbreadth)
continue; continue;
find_partitions(root, new_leaves, cache, maxdepth-1, maxbreadth); find_partitions(root, new_leaves, cache, maxdepth-1, maxbreadth, cell_type);
} }
} }
@ -302,7 +303,7 @@ struct ExtractFaWorker
count_func2 = 0; count_func2 = 0;
count_func3 = 0; count_func3 = 0;
find_partitions(root, leaves, cache, config.maxdepth, config.maxbreadth); find_partitions(root, leaves, cache, config.maxdepth, config.maxbreadth, it.second->type);
if (config.verbose && count_func2 > 0) if (config.verbose && count_func2 > 0)
log(" extracted %d two-input functions\n", count_func2); log(" extracted %d two-input functions\n", count_func2);