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/**CFile****************************************************************
FileName [saigCone.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Sequential AIG package.]
Synopsis [Cone of influence computation.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: saigCone.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "saig.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Counts the support size of the node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Saig_ManSupport_rec( Aig_Man_t * p, Aig_Obj_t * pObj, Vec_Ptr_t * vSupp )
{
if ( Aig_ObjIsTravIdCurrent(p, pObj) )
return;
Aig_ObjSetTravIdCurrent(p, pObj);
if ( Aig_ObjIsConst1(pObj) )
return;
if ( Aig_ObjIsCi(pObj) )
{
if ( Saig_ObjIsLo(p,pObj) )
{
pObj = Saig_ManLi( p, Aig_ObjCioId(pObj)-Saig_ManPiNum(p) );
Vec_PtrPush( vSupp, pObj );
}
return;
}
assert( Aig_ObjIsNode(pObj) );
Saig_ManSupport_rec( p, Aig_ObjFanin0(pObj), vSupp );
Saig_ManSupport_rec( p, Aig_ObjFanin1(pObj), vSupp );
}
/**Function*************************************************************
Synopsis [Counts the support size of the node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Ptr_t * Saig_ManSupport( Aig_Man_t * p, Vec_Ptr_t * vNodes )
{
Vec_Ptr_t * vSupp;
Aig_Obj_t * pObj;
int i;
vSupp = Vec_PtrAlloc( 100 );
Aig_ManIncrementTravId( p );
Vec_PtrForEachEntry( Aig_Obj_t *, vNodes, pObj, i )
{
assert( Aig_ObjIsCo(pObj) );
Saig_ManSupport_rec( p, Aig_ObjFanin0(pObj), vSupp );
}
return vSupp;
}
/**Function*************************************************************
Synopsis [Prints information about cones of influence of the POs.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Saig_ManPrintConeOne( Aig_Man_t * p, Aig_Obj_t * pObj )
{
Vec_Ptr_t * vPrev, * vCur, * vTotal;
int s, i, nCurNew, nCurPrev, nCurOld;
assert( Saig_ObjIsPo(p, pObj) );
// start the array
vPrev = Vec_PtrAlloc( 100 );
Vec_PtrPush( vPrev, pObj );
// get the current support
vCur = Saig_ManSupport( p, vPrev );
Vec_PtrClear( vPrev );
printf( " PO %3d ", Aig_ObjCioId(pObj) );
// continue computing supports as long as there are now nodes
vTotal = Vec_PtrAlloc( 100 );
for ( s = 0; ; s++ )
{
// classify current into those new, prev, and older
nCurNew = nCurPrev = nCurOld = 0;
Vec_PtrForEachEntry( Aig_Obj_t *, vCur, pObj, i )
{
if ( Vec_PtrFind(vTotal, pObj) == -1 )
{
Vec_PtrPush( vTotal, pObj );
nCurNew++;
}
else if ( Vec_PtrFind(vPrev, pObj) >= 0 )
nCurPrev++;
else
nCurOld++;
}
assert( nCurNew + nCurPrev + nCurOld == Vec_PtrSize(vCur) );
// print the result
printf( "%d:%d %d=%d+%d+%d ", s, Vec_PtrSize(vTotal), Vec_PtrSize(vCur), nCurNew, nCurPrev, nCurOld );
if ( nCurNew == 0 )
break;
// compute one more step
Vec_PtrFree( vPrev );
vCur = Saig_ManSupport( p, vPrev = vCur );
}
printf( "\n" );
Vec_PtrFree( vPrev );
Vec_PtrFree( vCur );
Vec_PtrFree( vTotal );
}
/**Function*************************************************************
Synopsis [Prints information about cones of influence of the POs.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Saig_ManPrintCones( Aig_Man_t * p )
{
Aig_Obj_t * pObj;
int i;
printf( "The format of this print-out: For each PO, x:a b=c+d+e, where \n" );
printf( "- x is the time-frame counting back from the PO\n" );
printf( "- a is the total number of registers in the COI of the PO so far\n" );
printf( "- b is the number of registers in the COI of the PO in this time-frame\n" );
printf( "- c is the number of registers in b that are new (appear for the first time)\n" );
printf( "- d is the number of registers in b in common with the previous time-frame\n" );
printf( "- e is the number of registers in b in common with other time-frames\n" );
Aig_ManSetCioIds( p );
Saig_ManForEachPo( p, pObj, i )
Saig_ManPrintConeOne( p, pObj );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
|
