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Do not add reset logic to un-initialized flops without fanout.

This commit is contained in:
Alan Mishchenko 2015-07-16 15:36:22 -07:00
parent 3a321133af
commit 0aab93566a
1 changed files with 6 additions and 1 deletions
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7
src/aig/gia/giaDup.c
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@ -2487,15 +2487,20 @@ Gia_Man_t * Gia_ManDupZeroUndc( Gia_Man_t * p, char * pInit, int fVerbose )
if ( CountPis > Gia_ManPiNum(p) )
iResetFlop = Gia_ManAppendCi( pNew );
// update flop outputs
Gia_ManMarkFanoutDrivers( p );
Gia_ManForEachRo( p, pObj, i )
{
if ( pInit[i] == '1' )
pObj->Value = Abc_LitNot(pObj->Value), Count1++;
else if ( pInit[i] == 'x' || pInit[i] == 'X' )
pObj->Value = Gia_ManAppendMux( pNew, iResetFlop, pObj->Value, Gia_Obj2Lit(pNew, Gia_ManPi(pNew, pPiLits[i])) );
{
if ( pObj->fMark0 ) // only add MUX if the flop has fanout
pObj->Value = Gia_ManAppendMux( pNew, iResetFlop, pObj->Value, Gia_Obj2Lit(pNew, Gia_ManPi(pNew, pPiLits[i])) );
}
else if ( pInit[i] != '0' )
assert( 0 );
}
Gia_ManCleanMark0( p );
ABC_FREE( pPiLits );
// build internal nodes
Gia_ManForEachAnd( p, pObj, i )