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Adding new (un)buffering with phase information.

This commit is contained in:
Alan Mishchenko 2013-08-05 19:21:10 -07:00
parent 1a55882ad9
commit 51714ef65d
1 changed files with 30 additions and 5 deletions
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35
src/map/scl/sclBuffer.c
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@ -156,13 +156,30 @@ Abc_Ntk_t * Abc_SclUnBufferPerform( Abc_Ntk_t * pNtk, int fVerbose )
SeeAlso [] SeeAlso []
***********************************************************************/ ***********************************************************************/
int Abc_SclCountMaxPhases( Abc_Ntk_t * pNtk )
{
Vec_Int_t * vPhLevel;
Abc_Obj_t * pObj, * pFanin;
int i, k, Max = 0, MaxAll = 0;
vPhLevel = Vec_IntStart( Abc_NtkObjNumMax(pNtk) );
Abc_NtkForEachNodeCo( pNtk, pObj, i )
{
Max = 0;
Abc_ObjForEachFanin( pObj, pFanin, k )
Max = Abc_MaxInt( Max, Vec_IntEntry(vPhLevel, Abc_ObjId(pFanin)) + Abc_ObjFaninPhase(pObj, k) );
Vec_IntWriteEntry( vPhLevel, i, Max );
MaxAll = Abc_MaxInt( MaxAll, Max );
}
Vec_IntFree( vPhLevel );
return MaxAll;
}
Abc_Ntk_t * Abc_SclBufferPhase( Abc_Ntk_t * pNtk, int fVerbose ) Abc_Ntk_t * Abc_SclBufferPhase( Abc_Ntk_t * pNtk, int fVerbose )
{ {
Abc_Ntk_t * pNtkNew; Abc_Ntk_t * pNtkNew;
Vec_Int_t * vInvs; Vec_Int_t * vInvs;
Abc_Obj_t * pObj, * pFanin, * pFaninNew; Abc_Obj_t * pObj, * pFanin, * pFaninNew;
int nNodesOld = Abc_NtkObjNumMax(pNtk); int nNodesOld = Abc_NtkObjNumMax(pNtk);
int i, k, Counter = 0; int i, k, Counter = 0, Total = 0;
assert( pNtk->vPhases != NULL ); assert( pNtk->vPhases != NULL );
vInvs = Vec_IntStart( Abc_NtkObjNumMax(pNtk) ); vInvs = Vec_IntStart( Abc_NtkObjNumMax(pNtk) );
Abc_NtkForEachNodeCo( pNtk, pObj, i ) Abc_NtkForEachNodeCo( pNtk, pObj, i )
@ -171,6 +188,7 @@ Abc_Ntk_t * Abc_SclBufferPhase( Abc_Ntk_t * pNtk, int fVerbose )
break; break;
Abc_ObjForEachFanin( pObj, pFanin, k ) Abc_ObjForEachFanin( pObj, pFanin, k )
{ {
Total++;
if ( !Abc_ObjFaninPhase(pObj, k) ) if ( !Abc_ObjFaninPhase(pObj, k) )
continue; continue;
if ( Vec_IntEntry(vInvs, Abc_ObjId(pFanin)) == 0 ) if ( Vec_IntEntry(vInvs, Abc_ObjId(pFanin)) == 0 )
@ -183,7 +201,8 @@ Abc_Ntk_t * Abc_SclBufferPhase( Abc_Ntk_t * pNtk, int fVerbose )
Abc_ObjPatchFanin( pObj, pFanin, pFaninNew ); Abc_ObjPatchFanin( pObj, pFanin, pFaninNew );
} }
} }
// printf( "Added %d inverters.\n", Counter ); if ( fVerbose )
printf( "Added %d (%.2f %%) inverters.\n", Counter, 100.0 * Counter / Total );
Vec_IntFree( vInvs ); Vec_IntFree( vInvs );
Vec_IntFillExtra( pNtk->vPhases, Abc_NtkObjNumMax(pNtk), 0 ); Vec_IntFillExtra( pNtk->vPhases, Abc_NtkObjNumMax(pNtk), 0 );
// duplicate network in topo order // duplicate network in topo order
@ -195,8 +214,9 @@ Abc_Ntk_t * Abc_SclBufferPhase( Abc_Ntk_t * pNtk, int fVerbose )
} }
Abc_Ntk_t * Abc_SclUnBufferPhase( Abc_Ntk_t * pNtk, int fVerbose ) Abc_Ntk_t * Abc_SclUnBufferPhase( Abc_Ntk_t * pNtk, int fVerbose )
{ {
Abc_Ntk_t * pNtkNew;
Abc_Obj_t * pObj, * pFanin, * pFaninNew; Abc_Obj_t * pObj, * pFanin, * pFaninNew;
int i, k, iLit, Counter = 0; int i, k, iLit, Counter = 0, Total = 0;
assert( pNtk->vPhases == NULL ); assert( pNtk->vPhases == NULL );
pNtk->vPhases = Vec_IntStart( Abc_NtkObjNumMax(pNtk) ); pNtk->vPhases = Vec_IntStart( Abc_NtkObjNumMax(pNtk) );
Abc_NtkForEachNodeCo( pNtk, pObj, i ) Abc_NtkForEachNodeCo( pNtk, pObj, i )
@ -205,6 +225,7 @@ Abc_Ntk_t * Abc_SclUnBufferPhase( Abc_Ntk_t * pNtk, int fVerbose )
continue; continue;
Abc_ObjForEachFanin( pObj, pFanin, k ) Abc_ObjForEachFanin( pObj, pFanin, k )
{ {
Total++;
iLit = Abc_SclGetRealFaninLit( pFanin ); iLit = Abc_SclGetRealFaninLit( pFanin );
pFaninNew = Abc_NtkObj( pNtk, Abc_Lit2Var(iLit) ); pFaninNew = Abc_NtkObj( pNtk, Abc_Lit2Var(iLit) );
if ( pFaninNew == pFanin ) if ( pFaninNew == pFanin )
@ -217,9 +238,13 @@ Abc_Ntk_t * Abc_SclUnBufferPhase( Abc_Ntk_t * pNtk, int fVerbose )
Abc_ObjFaninFlipPhase( pObj, k ), Counter++; Abc_ObjFaninFlipPhase( pObj, k ), Counter++;
} }
} }
// printf( "Saved %d fanin phase bits.\n", Counter ); if ( fVerbose )
printf( "Saved %d (%.2f %%) fanin phase bits. ", Counter, 100.0 * Counter / Total );
// duplicate network in topo order // duplicate network in topo order
return Abc_NtkDupDfs( pNtk ); pNtkNew = Abc_NtkDupDfs( pNtk );
if ( fVerbose )
printf( "Max depth = %d.\n", Abc_SclCountMaxPhases(pNtkNew) );
return pNtkNew;
} }
/**Function************************************************************* /**Function*************************************************************