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Experiments with permutations.

This commit is contained in:
Alan Mishchenko 2014-04-23 11:58:35 -07:00
parent c6999c3ca4
commit 3a4ef2d7a7
1 changed files with 5 additions and 12 deletions
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17
src/misc/extra/extraUtilPerm.c
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@ -587,10 +587,9 @@ int Abc_ZddPerm( Abc_ZddMan * p, int a, int Var )
}
return Abc_ZddCacheInsert( p, a, Var, ABC_ZDD_OPER_PERM, r );
}
int Abc_ZddPermProduct( Abc_ZddMan * p, int a, int b )
{
Abc_ZddObj * A, * B;
Abc_ZddObj * B;
int r0, r1, r;
if ( a == 0 ) return 0;
if ( a == 1 ) return b;
@ -598,17 +597,11 @@ int Abc_ZddPermProduct( Abc_ZddMan * p, int a, int b )
if ( b == 1 ) return a;
if ( (r = Abc_ZddCacheLookup(p, a, b, ABC_ZDD_OPER_PERM_PROD)) >= 0 )
return r;
A = Abc_ZddNode( p, a );
B = Abc_ZddNode( p, b );
if ( p->pV2TJ[A->Var] < p->pV2TI[B->Var] ) // Aj < Bi
r0 = Abc_ZddPermProduct( p, A->False, b ),
r1 = Abc_ZddPermProduct( p, A->True, b ),
r = Abc_ZddUniqueCreate( p, A->Var, r1, r0 );
else
r0 = Abc_ZddPermProduct( p, a, B->False ),
r1 = Abc_ZddPermProduct( p, a, B->True ),
r1 = Abc_ZddPerm( p, r1, B->Var ),
r = Abc_ZddUnion( p, r0, r1 );
r0 = Abc_ZddPermProduct( p, a, B->False );
r1 = Abc_ZddPermProduct( p, a, B->True );
r1 = Abc_ZddPerm( p, r1, B->Var );
r = Abc_ZddUnion( p, r0, r1 );
return Abc_ZddCacheInsert( p, a, b, ABC_ZDD_OPER_PERM_PROD, r );
}