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| author | Alan Mishchenko <alanmi@berkeley.edu> | 2013-03-13 11:47:17 +0100 |
|---|---|---|
| committer | Alan Mishchenko <alanmi@berkeley.edu> | 2013-03-13 11:47:17 +0100 |
| commit | bf795e57cf427d74d002d7cc80c4000447f5543c (patch) | |
| tree | 91fc5d560ff61b0537a69a1f08bc71763bfcaba8 /src/aig | |
| parent | ec2973947cfe8165fdbbdaeeb011e3245cd683f8 (diff) | |
| download | abc-bf795e57cf427d74d002d7cc80c4000447f5543c.tar.gz abc-bf795e57cf427d74d002d7cc80c4000447f5543c.tar.bz2 abc-bf795e57cf427d74d002d7cc80c4000447f5543c.zip | |
Handling special case in 'fold' when the network is combinational.
Diffstat (limited to 'src/aig')
| -rw-r--r-- | src/aig/saig/saigConstr2.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/src/aig/saig/saigConstr2.c b/src/aig/saig/saigConstr2.c index 1d842b3c..7213bdff 100644 --- a/src/aig/saig/saigConstr2.c +++ b/src/aig/saig/saigConstr2.c @@ -944,7 +944,6 @@ Aig_Man_t * Saig_ManDupFoldConstrsFunc( Aig_Man_t * pAig, int fCompl, int fVerbo Aig_Man_t * pAigNew; Aig_Obj_t * pMiter, * pFlopOut, * pFlopIn, * pObj; int i; - assert( Saig_ManRegNum(pAig) > 0 ); if ( Aig_ManConstrNum(pAig) == 0 ) return Aig_ManDupDfs( pAig ); assert( Aig_ManConstrNum(pAig) < Saig_ManPoNum(pAig) ); @@ -969,9 +968,15 @@ Aig_Man_t * Saig_ManDupFoldConstrsFunc( Aig_Man_t * pAig, int fCompl, int fVerbo continue; pMiter = Aig_Or( pAigNew, pMiter, Aig_NotCond( Aig_ObjChild0Copy(pObj), fCompl ) ); } + // create additional flop - pFlopOut = Aig_ObjCreateCi( pAigNew ); - pFlopIn = Aig_Or( pAigNew, pMiter, pFlopOut ); + if ( Saig_ManRegNum(pAig) > 0 ) + { + pFlopOut = Aig_ObjCreateCi( pAigNew ); + pFlopIn = Aig_Or( pAigNew, pMiter, pFlopOut ); + } + else + pFlopIn = pMiter; // create primary output Saig_ManForEachPo( pAig, pObj, i ) @@ -985,10 +990,15 @@ Aig_Man_t * Saig_ManDupFoldConstrsFunc( Aig_Man_t * pAig, int fCompl, int fVerbo // transfer to register outputs Saig_ManForEachLi( pAig, pObj, i ) Aig_ObjCreateCo( pAigNew, Aig_ObjChild0Copy(pObj) ); + // create additional flop - Aig_ObjCreateCo( pAigNew, pFlopIn ); + if ( Saig_ManRegNum(pAig) > 0 ) + { + Aig_ObjCreateCo( pAigNew, pFlopIn ); + Aig_ManSetRegNum( pAigNew, Aig_ManRegNum(pAig)+1 ); + } - Aig_ManSetRegNum( pAigNew, Aig_ManRegNum(pAig)+1 ); + // perform cleanup Aig_ManCleanup( pAigNew ); Aig_ManSeqCleanup( pAigNew ); return pAigNew; |