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| author | Alan Mishchenko <alanmi@berkeley.edu> | 2012-02-12 17:30:05 -0800 |
|---|---|---|
| committer | Alan Mishchenko <alanmi@berkeley.edu> | 2012-02-12 17:30:05 -0800 |
| commit | d0713831a09bfd2de11f0762ed2aeb8e6e9c5170 (patch) | |
| tree | 0d5e068375474e3b39802cff8732b3665169b404 /src | |
| parent | 9f331ae915e5f6c2ef0fb7b8ef9f109ea5d96f87 (diff) | |
| download | abc-d0713831a09bfd2de11f0762ed2aeb8e6e9c5170.tar.gz abc-d0713831a09bfd2de11f0762ed2aeb8e6e9c5170.tar.bz2 abc-d0713831a09bfd2de11f0762ed2aeb8e6e9c5170.zip | |
Lazy man's logic synthesis.
Diffstat (limited to 'src')
| -rw-r--r-- | src/base/abci/abcRec.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/src/base/abci/abcRec.c b/src/base/abci/abcRec.c index adb4dcf6..7761c230 100644 --- a/src/base/abci/abcRec.c +++ b/src/base/abci/abcRec.c @@ -868,11 +868,15 @@ Hop_Obj_t * Abc_RecToHop( Hop_Man_t * pMan, If_Man_t * pIfMan, If_Cut_t * pCut, // return Abc_NodeTruthToHop(pMan, pIfMan, pCut); Kit_TruthCopy(pInOut, If_CutTruth(pCut), pCut->nLimit); //special cases when cut-minimization return 2, that means there is only one leaf in the cut. + if ((Kit_TruthIsConst0(pInOut, nLeaves) && pCut->fCompl == 0) || (Kit_TruthIsConst1(pInOut, nLeaves) && pCut->fCompl == 1)) + return Hop_ManConst0(pMan); + if ((Kit_TruthIsConst0(pInOut, nLeaves) && pCut->fCompl == 1) || (Kit_TruthIsConst1(pInOut, nLeaves) && pCut->fCompl == 0)) + return Hop_ManConst1(pMan); if (Kit_TruthSupport(pInOut, nLeaves) != Kit_BitMask(nLeaves)) - { + { for (i = 0; i < nLeaves; i++) if(Kit_TruthVarInSupport( pInOut, nLeaves, i )) - return Hop_IthVar(pMan, i); + return Hop_NotCond(Hop_IthVar(pMan, i), (pCut->fCompl ^ ((*pInOut & 0x01) > 0))); } for (i = 0; i < nLeaves; i++) @@ -2792,11 +2796,23 @@ int If_CutDelayRecCost(If_Man_t* p, If_Cut_t* pCut, If_Obj_t * pObj) //if not every variables are in the support, skip this cut. if ( Kit_TruthSupport(pInOut, nLeaves) != Kit_BitMask(nLeaves) ) { + DelayMin = 0; //s_pMan->nFunsFilteredBysupport++; pCut->fUser = 1; pCut->fUseless = 0; - pCut->Cost = 0; - return 0; + pCut->Cost = 1; + for (i = 0; i < nLeaves; i++) + { + if(Kit_TruthVarInSupport( pInOut, nLeaves, i )) + { + pCut->pPerm[i] = 0; + DelayMin = If_ObjCutBest(If_ManObj( p, pCut->pLeaves[i]))->Delay; + } + else + pCut->pPerm[i] = IF_BIG_CHAR; + } + + return DelayMin; } timeCanonicize = clock(); //canonicize |