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Adding an option to not add buffers to decouple COs driven by the same internal node.

This commit is contained in:
Alan Mishchenko 2017-01-07 09:51:38 +07:00
parent 460167ec74
commit 3dd2325aa8
1 changed files with 7 additions and 0 deletions
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7
src/base/abc/abcUtil.c
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@ -1077,6 +1077,7 @@ void Abc_NtkLogicMakeSimpleCosTest( Abc_Ntk_t * pNtk, int fDuplicate )
***********************************************************************/
int Abc_NtkLogicMakeSimpleCos( Abc_Ntk_t * pNtk, int fDuplicate )
{
int fAddBuffers = 1;
Vec_Ptr_t * vDrivers, * vCoTerms;
Abc_Obj_t * pNode, * pDriver, * pDriverNew, * pFanin;
int i, k, LevelMax, nTotal = 0;
@ -1191,6 +1192,12 @@ int Abc_NtkLogicMakeSimpleCos( Abc_Ntk_t * pNtk, int fDuplicate )
// collect COs that needs fixing by adding buffers or duplicating
vCoTerms = Vec_PtrAlloc( 100 );
Abc_NtkIncrementTravId( pNtk );
// The following cases should be addressed only if the network is written
// into a BLIF file. Otherwise, it is possible to skip them:
// (1) if a CO points to a CI with a different name
// (2) if an internal node drives more than one CO
if ( fAddBuffers )
Abc_NtkForEachCo( pNtk, pNode, i )
{
// if the driver is a CI and has different name, this is an error