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abc/src/base/abc/abcFunc.c

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/**CFile****************************************************************
FileName [abcFunc.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Network and node package.]
Synopsis [Transformations between different functionality representations.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: abcFunc.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "abc.h"
#include "base/main/main.h"
#include "map/mio/mio.h"
#include "misc/extra/extraBdd.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
#define ABC_MUX_CUBES 100000
static int Abc_ConvertZddToSop( DdManager * dd, DdNode * zCover, char * pSop, int nFanins, Vec_Str_t * vCube, int fPhase );
static DdNode * Abc_ConvertAigToBdd( DdManager * dd, Hop_Obj_t * pRoot);
static Hop_Obj_t * Abc_ConvertSopToAig( Hop_Man_t * pMan, char * pSop );
extern int Abc_CountZddCubes( DdManager * dd, DdNode * zCover );
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Converts the node from SOP to BDD representation.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
DdNode * Abc_ConvertSopToBdd( DdManager * dd, char * pSop, DdNode ** pbVars )
{
DdNode * bSum, * bCube, * bTemp, * bVar;
char * pCube;
int nVars, Value, v;
// start the cover
nVars = Abc_SopGetVarNum(pSop);
bSum = Cudd_ReadLogicZero(dd); Cudd_Ref( bSum );
if ( Abc_SopIsExorType(pSop) )
{
for ( v = 0; v < nVars; v++ )
{
bSum = Cudd_bddXor( dd, bTemp = bSum, pbVars? pbVars[v] : Cudd_bddIthVar(dd, v) ); Cudd_Ref( bSum );
Cudd_RecursiveDeref( dd, bTemp );
}
}
else
{
// check the logic function of the node
Abc_SopForEachCube( pSop, nVars, pCube )
{
bCube = Cudd_ReadOne(dd); Cudd_Ref( bCube );
Abc_CubeForEachVar( pCube, Value, v )
{
if ( Value == '0' )
bVar = Cudd_Not( pbVars? pbVars[v] : Cudd_bddIthVar( dd, v ) );
else if ( Value == '1' )
bVar = pbVars? pbVars[v] : Cudd_bddIthVar( dd, v );
else
continue;
bCube = Cudd_bddAnd( dd, bTemp = bCube, bVar ); Cudd_Ref( bCube );
Cudd_RecursiveDeref( dd, bTemp );
}
bSum = Cudd_bddOr( dd, bTemp = bSum, bCube );
Cudd_Ref( bSum );
Cudd_RecursiveDeref( dd, bTemp );
Cudd_RecursiveDeref( dd, bCube );
}
}
// complement the result if necessary
bSum = Cudd_NotCond( bSum, !Abc_SopGetPhase(pSop) );
Cudd_Deref( bSum );
return bSum;
}
/**Function*************************************************************
Synopsis [Converts the network from SOP to BDD representation.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkSopToBdd( Abc_Ntk_t * pNtk )
{
Abc_Obj_t * pNode;
DdManager * dd, * ddTemp = NULL;
Vec_Int_t * vFanins = NULL;
int nFaninsMax, i, k, iVar;
assert( Abc_NtkHasSop(pNtk) );
// start the functionality manager
nFaninsMax = Abc_NtkGetFaninMax( pNtk );
if ( nFaninsMax == 0 )
printf( "Warning: The network has only constant nodes.\n" );
dd = Cudd_Init( nFaninsMax, 0, CUDD_UNIQUE_SLOTS, CUDD_CACHE_SLOTS, 0 );
// start temporary manager for reordered local functions
if ( nFaninsMax > 10 )
{
ddTemp = Cudd_Init( nFaninsMax, 0, CUDD_UNIQUE_SLOTS, CUDD_CACHE_SLOTS, 0 );
Cudd_AutodynEnable( ddTemp, CUDD_REORDER_SYMM_SIFT );
vFanins = Vec_IntAlloc( nFaninsMax );
}
// convert each node from SOP to BDD
Abc_NtkForEachNode( pNtk, pNode, i )
{
assert( pNode->pData );
if ( Abc_ObjFaninNum(pNode) > 10 )
{
DdNode * pFunc = Abc_ConvertSopToBdd( ddTemp, (char *)pNode->pData, NULL );
if ( pFunc == NULL )
{
printf( "Abc_NtkSopToBdd: Error while converting SOP into BDD.\n" );
return 0;
}
Cudd_Ref( pFunc );
// find variable mapping
Vec_IntFill( vFanins, Abc_ObjFaninNum(pNode), -1 );
for ( k = iVar = 0; k < nFaninsMax; k++ )
if ( ddTemp->invperm[k] < Abc_ObjFaninNum(pNode) )
Vec_IntWriteEntry( vFanins, ddTemp->invperm[k], iVar++ );
assert( iVar == Abc_ObjFaninNum(pNode) );
// transfer to the main manager
pNode->pData = Extra_TransferPermute( ddTemp, dd, pFunc, Vec_IntArray(vFanins) );
Cudd_Ref( (DdNode *)pNode->pData );
Cudd_RecursiveDeref( ddTemp, pFunc );
// update variable order
Vec_IntClear( vFanins );
for ( k = 0; k < nFaninsMax; k++ )
if ( ddTemp->invperm[k] < Abc_ObjFaninNum(pNode) )
Vec_IntPush( vFanins, Vec_IntEntry(&pNode->vFanins, ddTemp->invperm[k]) );
for ( k = 0; k < Abc_ObjFaninNum(pNode); k++ )
Vec_IntWriteEntry( &pNode->vFanins, k, Vec_IntEntry(vFanins, k) );
}
else
{
pNode->pData = Abc_ConvertSopToBdd( dd, (char *)pNode->pData, NULL );
if ( pNode->pData == NULL )
{
printf( "Abc_NtkSopToBdd: Error while converting SOP into BDD.\n" );
return 0;
}
Cudd_Ref( (DdNode *)pNode->pData );
}
}
if ( ddTemp )
{
// printf( "Reorderings performed = %d.\n", Cudd_ReadReorderings(ddTemp) );
Extra_StopManager( ddTemp );
}
Vec_IntFreeP( &vFanins );
Mem_FlexStop( (Mem_Flex_t *)pNtk->pManFunc, 0 );
pNtk->pManFunc = dd;
// update the network type
pNtk->ntkFunc = ABC_FUNC_BDD;
return 1;
}
/**Function*************************************************************
Synopsis [Converts the node from BDD to SOP representation.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
char * Abc_ConvertBddToSop( Mem_Flex_t * pMan, DdManager * dd, DdNode * bFuncOn, DdNode * bFuncOnDc, int nFanins, int fAllPrimes, Vec_Str_t * vCube, int fMode )
{
int fVerify = 0;
char * pSop;
DdNode * bFuncNew, * bCover, * zCover, * zCover0, * zCover1;
int nCubes, nCubes0, nCubes1, fPhase;
assert( bFuncOn == bFuncOnDc || Cudd_bddLeq( dd, bFuncOn, bFuncOnDc ) );
if ( Cudd_IsConstant(bFuncOn) || Cudd_IsConstant(bFuncOnDc) )
{
if ( fMode == -1 ) // if the phase is not known, write constant 1
fMode = 1;
Vec_StrFill( vCube, nFanins, '-' );
Vec_StrPush( vCube, '\0' );
if ( pMan )
pSop = Mem_FlexEntryFetch( pMan, nFanins + 4 );
else
pSop = ABC_ALLOC( char, nFanins + 4 );
if ( bFuncOn == Cudd_ReadOne(dd) )
sprintf( pSop, "%s %d\n", vCube->pArray, fMode );
else
sprintf( pSop, "%s %d\n", vCube->pArray, !fMode );
return pSop;
}
if ( fMode == -1 )
{ // try both phases
assert( fAllPrimes == 0 );
// get the ZDD of the negative polarity
bCover = Cudd_zddIsop( dd, Cudd_Not(bFuncOnDc), Cudd_Not(bFuncOn), &zCover0 );
Cudd_Ref( zCover0 );
Cudd_Ref( bCover );
Cudd_RecursiveDeref( dd, bCover );
nCubes0 = Abc_CountZddCubes( dd, zCover0 );
// get the ZDD of the positive polarity
bCover = Cudd_zddIsop( dd, bFuncOn, bFuncOnDc, &zCover1 );
Cudd_Ref( zCover1 );
Cudd_Ref( bCover );
Cudd_RecursiveDeref( dd, bCover );
nCubes1 = Abc_CountZddCubes( dd, zCover1 );
// compare the number of cubes
if ( nCubes1 <= nCubes0 )
{ // use positive polarity
nCubes = nCubes1;
zCover = zCover1;
Cudd_RecursiveDerefZdd( dd, zCover0 );
fPhase = 1;
}
else
{ // use negative polarity
nCubes = nCubes0;
zCover = zCover0;
Cudd_RecursiveDerefZdd( dd, zCover1 );
fPhase = 0;
}
}
else if ( fMode == 0 )
{
// get the ZDD of the negative polarity
if ( fAllPrimes )
{
zCover = Extra_zddPrimes( dd, Cudd_Not(bFuncOnDc) );
Cudd_Ref( zCover );
}
else
{
bCover = Cudd_zddIsop( dd, Cudd_Not(bFuncOnDc), Cudd_Not(bFuncOn), &zCover );
Cudd_Ref( zCover );
Cudd_Ref( bCover );
Cudd_RecursiveDeref( dd, bCover );
}
nCubes = Abc_CountZddCubes( dd, zCover );
fPhase = 0;
}
else if ( fMode == 1 )
{
// get the ZDD of the positive polarity
if ( fAllPrimes )
{
zCover = Extra_zddPrimes( dd, bFuncOnDc );
Cudd_Ref( zCover );
}
else
{
bCover = Cudd_zddIsop( dd, bFuncOn, bFuncOnDc, &zCover );
Cudd_Ref( zCover );
Cudd_Ref( bCover );
Cudd_RecursiveDeref( dd, bCover );
}
nCubes = Abc_CountZddCubes( dd, zCover );
fPhase = 1;
}
else
{
assert( 0 );
}
if ( nCubes > ABC_MUX_CUBES )
{
Cudd_RecursiveDerefZdd( dd, zCover );
printf( "The number of cubes exceeded the predefined limit (%d).\n", ABC_MUX_CUBES );
return NULL;
}
// allocate memory for the cover
if ( pMan )
pSop = Mem_FlexEntryFetch( pMan, (nFanins + 3) * nCubes + 1 );
else
pSop = ABC_ALLOC( char, (nFanins + 3) * nCubes + 1 );
pSop[(nFanins + 3) * nCubes] = 0;
// create the SOP
Vec_StrFill( vCube, nFanins, '-' );
Vec_StrPush( vCube, '\0' );
Abc_ConvertZddToSop( dd, zCover, pSop, nFanins, vCube, fPhase );
Cudd_RecursiveDerefZdd( dd, zCover );
// verify
if ( fVerify )
{
bFuncNew = Abc_ConvertSopToBdd( dd, pSop, NULL ); Cudd_Ref( bFuncNew );
if ( bFuncOn == bFuncOnDc )
{
if ( bFuncNew != bFuncOn )
printf( "Verification failed.\n" );
}
else
{
if ( !Cudd_bddLeq(dd, bFuncOn, bFuncNew) || !Cudd_bddLeq(dd, bFuncNew, bFuncOnDc) )
printf( "Verification failed.\n" );
}
Cudd_RecursiveDeref( dd, bFuncNew );
}
return pSop;
}
/**Function*************************************************************
Synopsis [Converts the network from BDD to SOP representation.]
Description [If the flag is set to 1, forces the direct phase of all covers.]
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkBddToSop( Abc_Ntk_t * pNtk, int fDirect )
{
extern void Abc_NtkSortSops( Abc_Ntk_t * pNtk );
Abc_Obj_t * pNode;
Mem_Flex_t * pManNew;
DdManager * dd = (DdManager *)pNtk->pManFunc;
DdNode * bFunc;
Vec_Str_t * vCube;
int i, fMode;
if ( fDirect )
fMode = 1;
else
fMode = -1;
assert( Abc_NtkHasBdd(pNtk) );
if ( dd->size > 0 )
Cudd_zddVarsFromBddVars( dd, 2 );
// create the new manager
pManNew = Mem_FlexStart();
// go through the objects
vCube = Vec_StrAlloc( 100 );
Abc_NtkForEachNode( pNtk, pNode, i )
{
assert( pNode->pData );
bFunc = (DdNode *)pNode->pData;
pNode->pNext = (Abc_Obj_t *)Abc_ConvertBddToSop( pManNew, dd, bFunc, bFunc, Abc_ObjFaninNum(pNode), 0, vCube, fMode );
if ( pNode->pNext == NULL )
{
Mem_FlexStop( pManNew, 0 );
Abc_NtkCleanNext( pNtk );
// printf( "Converting from BDDs to SOPs has failed.\n" );
Vec_StrFree( vCube );
return 0;
}
}
Vec_StrFree( vCube );
// update the network type
pNtk->ntkFunc = ABC_FUNC_SOP;
// set the new manager
pNtk->pManFunc = pManNew;
// transfer from next to data
Abc_NtkForEachNode( pNtk, pNode, i )
{
Cudd_RecursiveDeref( dd, (DdNode *)pNode->pData );
pNode->pData = pNode->pNext;
pNode->pNext = NULL;
}
// check for remaining references in the package
Extra_StopManager( dd );
// reorder fanins and cubes to make SOPs more human-readable
Abc_NtkSortSops( pNtk );
return 1;
}
/**Function*************************************************************
Synopsis [Derive the SOP from the ZDD representation of the cubes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_ConvertZddToSop_rec( DdManager * dd, DdNode * zCover, char * pSop, int nFanins, Vec_Str_t * vCube, int fPhase, int * pnCubes )
{
DdNode * zC0, * zC1, * zC2;
int Index;
if ( zCover == dd->zero )
return;
if ( zCover == dd->one )
{
char * pCube;
pCube = pSop + (*pnCubes) * (nFanins + 3);
sprintf( pCube, "%s %d\n", vCube->pArray, fPhase );
(*pnCubes)++;
return;
}
Index = zCover->index/2;
assert( Index < nFanins );
extraDecomposeCover( dd, zCover, &zC0, &zC1, &zC2 );
vCube->pArray[Index] = '0';
Abc_ConvertZddToSop_rec( dd, zC0, pSop, nFanins, vCube, fPhase, pnCubes );
vCube->pArray[Index] = '1';
Abc_ConvertZddToSop_rec( dd, zC1, pSop, nFanins, vCube, fPhase, pnCubes );
vCube->pArray[Index] = '-';
Abc_ConvertZddToSop_rec( dd, zC2, pSop, nFanins, vCube, fPhase, pnCubes );
}
/**Function*************************************************************
Synopsis [Derive the BDD for the function in the cut.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_ConvertZddToSop( DdManager * dd, DdNode * zCover, char * pSop, int nFanins, Vec_Str_t * vCube, int fPhase )
{
int nCubes = 0;
Abc_ConvertZddToSop_rec( dd, zCover, pSop, nFanins, vCube, fPhase, &nCubes );
return nCubes;
}
/**Function*************************************************************
Synopsis [Computes the SOPs of the negative and positive phase of the node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NodeBddToCnf( Abc_Obj_t * pNode, Mem_Flex_t * pMmMan, Vec_Str_t * vCube, int fAllPrimes, char ** ppSop0, char ** ppSop1 )
{
assert( Abc_NtkHasBdd(pNode->pNtk) );
*ppSop0 = Abc_ConvertBddToSop( pMmMan, (DdManager *)pNode->pNtk->pManFunc, (DdNode *)pNode->pData, (DdNode *)pNode->pData, Abc_ObjFaninNum(pNode), fAllPrimes, vCube, 0 );
*ppSop1 = Abc_ConvertBddToSop( pMmMan, (DdManager *)pNode->pNtk->pManFunc, (DdNode *)pNode->pData, (DdNode *)pNode->pData, Abc_ObjFaninNum(pNode), fAllPrimes, vCube, 1 );
}
/**Function*************************************************************
Synopsis [Removes complemented SOP covers.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkLogicMakeDirectSops( Abc_Ntk_t * pNtk )
{
DdManager * dd;
DdNode * bFunc;
Vec_Str_t * vCube;
Abc_Obj_t * pNode;
int nFaninsMax, fFound, i;
assert( Abc_NtkHasSop(pNtk) );
// check if there are nodes with complemented SOPs
fFound = 0;
Abc_NtkForEachNode( pNtk, pNode, i )
if ( Abc_SopIsComplement((char *)pNode->pData) )
{
fFound = 1;
break;
}
if ( !fFound )
return;
// start the BDD package
nFaninsMax = Abc_NtkGetFaninMax( pNtk );
if ( nFaninsMax == 0 )
printf( "Warning: The network has only constant nodes.\n" );
dd = Cudd_Init( nFaninsMax, 0, CUDD_UNIQUE_SLOTS, CUDD_CACHE_SLOTS, 0 );
// change the cover of negated nodes
vCube = Vec_StrAlloc( 100 );
Abc_NtkForEachNode( pNtk, pNode, i )
if ( Abc_SopIsComplement((char *)pNode->pData) )
{
bFunc = Abc_ConvertSopToBdd( dd, (char *)pNode->pData, NULL ); Cudd_Ref( bFunc );
pNode->pData = Abc_ConvertBddToSop( (Mem_Flex_t *)pNtk->pManFunc, dd, bFunc, bFunc, Abc_ObjFaninNum(pNode), 0, vCube, 1 );
Cudd_RecursiveDeref( dd, bFunc );
assert( !Abc_SopIsComplement((char *)pNode->pData) );
}
Vec_StrFree( vCube );
Extra_StopManager( dd );
}
/**Function*************************************************************
Synopsis [Count the number of paths in the ZDD.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_CountZddCubes_rec( DdManager * dd, DdNode * zCover, int * pnCubes )
{
DdNode * zC0, * zC1, * zC2;
if ( zCover == dd->zero )
return;
if ( zCover == dd->one )
{
(*pnCubes)++;
return;
}
if ( (*pnCubes) > ABC_MUX_CUBES )
return;
extraDecomposeCover( dd, zCover, &zC0, &zC1, &zC2 );
Abc_CountZddCubes_rec( dd, zC0, pnCubes );
Abc_CountZddCubes_rec( dd, zC1, pnCubes );
Abc_CountZddCubes_rec( dd, zC2, pnCubes );
}
/**Function*************************************************************
Synopsis [Count the number of paths in the ZDD.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_CountZddCubes( DdManager * dd, DdNode * zCover )
{
int nCubes = 0;
Abc_CountZddCubes_rec( dd, zCover, &nCubes );
return nCubes;
}
/**Function*************************************************************
Synopsis [Converts the network from SOP to AIG representation.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkSopToAig( Abc_Ntk_t * pNtk )
{
extern int Abc_NtkMakeLegit( Abc_Ntk_t * pNtk );
Abc_Obj_t * pNode;
Hop_Man_t * pMan;
int i;
assert( Abc_NtkHasSop(pNtk) );
// make dist1-free and SCC-free
// Abc_NtkMakeLegit( pNtk );
// start the functionality manager
pMan = Hop_ManStart();
// convert each node from SOP to BDD
Abc_NtkForEachNode( pNtk, pNode, i )
{
assert( pNode->pData );
pNode->pData = Abc_ConvertSopToAig( pMan, (char *)pNode->pData );
if ( pNode->pData == NULL )
{
Hop_ManStop( pMan );
printf( "Abc_NtkSopToAig: Error while converting SOP into AIG.\n" );
return 0;
}
}
Mem_FlexStop( (Mem_Flex_t *)pNtk->pManFunc, 0 );
pNtk->pManFunc = pMan;
// update the network type
pNtk->ntkFunc = ABC_FUNC_AIG;
return 1;
}
/**Function*************************************************************
Synopsis [Strashes one logic node using its SOP.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Hop_Obj_t * Abc_ConvertSopToAigInternal( Hop_Man_t * pMan, char * pSop )
{
Hop_Obj_t * pAnd, * pSum;
int i, Value, nFanins;
char * pCube;
// get the number of variables
nFanins = Abc_SopGetVarNum(pSop);
if ( Abc_SopIsExorType(pSop) )
{
pSum = Hop_ManConst0(pMan);
for ( i = 0; i < nFanins; i++ )
pSum = Hop_Exor( pMan, pSum, Hop_IthVar(pMan,i) );
}
else
{
// go through the cubes of the node's SOP
pSum = Hop_ManConst0(pMan);
Abc_SopForEachCube( pSop, nFanins, pCube )
{
// create the AND of literals
pAnd = Hop_ManConst1(pMan);
Abc_CubeForEachVar( pCube, Value, i )
{
if ( Value == '1' )
pAnd = Hop_And( pMan, pAnd, Hop_IthVar(pMan,i) );
else if ( Value == '0' )
pAnd = Hop_And( pMan, pAnd, Hop_Not(Hop_IthVar(pMan,i)) );
}
// add to the sum of cubes
pSum = Hop_Or( pMan, pSum, pAnd );
}
}
// decide whether to complement the result
if ( Abc_SopIsComplement(pSop) )
pSum = Hop_Not(pSum);
return pSum;
}
/**Function*************************************************************
Synopsis [Converts the network from AIG to BDD representation.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Hop_Obj_t * Abc_ConvertSopToAig( Hop_Man_t * pMan, char * pSop )
{
extern Hop_Obj_t * Dec_GraphFactorSop( Hop_Man_t * pMan, char * pSop );
int fUseFactor = 1;
// consider the constant node
if ( Abc_SopGetVarNum(pSop) == 0 )
return Hop_NotCond( Hop_ManConst1(pMan), Abc_SopIsConst0(pSop) );
// decide when to use factoring
if ( fUseFactor && Abc_SopGetVarNum(pSop) > 2 && Abc_SopGetCubeNum(pSop) > 1 && !Abc_SopIsExorType(pSop) )
return Dec_GraphFactorSop( pMan, pSop );
return Abc_ConvertSopToAigInternal( pMan, pSop );
}
/**Function*************************************************************
Synopsis [Converts the network from AIG to BDD representation.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkAigToBdd( Abc_Ntk_t * pNtk )
{
Abc_Obj_t * pNode;
Hop_Man_t * pMan;
DdManager * dd, * ddTemp = NULL;
Vec_Int_t * vFanins = NULL;
int nFaninsMax, i, k, iVar;
assert( Abc_NtkHasAig(pNtk) );
// start the functionality manager
nFaninsMax = Abc_NtkGetFaninMax( pNtk );
if ( nFaninsMax == 0 )
printf( "Warning: The network has only constant nodes.\n" );
dd = Cudd_Init( nFaninsMax, 0, CUDD_UNIQUE_SLOTS, CUDD_CACHE_SLOTS, 0 );
// start temporary manager for reordered local functions
ddTemp = Cudd_Init( nFaninsMax, 0, CUDD_UNIQUE_SLOTS, CUDD_CACHE_SLOTS, 0 );
Cudd_AutodynEnable( ddTemp, CUDD_REORDER_SYMM_SIFT );
vFanins = Vec_IntAlloc( nFaninsMax );
// set the mapping of elementary AIG nodes into the elementary BDD nodes
pMan = (Hop_Man_t *)pNtk->pManFunc;
assert( Hop_ManPiNum(pMan) >= nFaninsMax );
for ( i = 0; i < nFaninsMax; i++ )
Hop_ManPi(pMan, i)->pData = Cudd_bddIthVar(ddTemp, i);
// convert each node from SOP to BDD
Abc_NtkForEachNode( pNtk, pNode, i )
{
DdNode * pFunc = Abc_ConvertAigToBdd( ddTemp, (Hop_Obj_t *)pNode->pData );
if ( pFunc == NULL )
{
printf( "Abc_NtkAigToBdd: Error while converting AIG into BDD.\n" );
return 0;
}
Cudd_Ref( pFunc );
// find variable mapping
Vec_IntFill( vFanins, Abc_ObjFaninNum(pNode), -1 );
for ( k = iVar = 0; k < nFaninsMax; k++ )
if ( ddTemp->invperm[k] < Abc_ObjFaninNum(pNode) )
Vec_IntWriteEntry( vFanins, ddTemp->invperm[k], iVar++ );
assert( iVar == Abc_ObjFaninNum(pNode) );
// transfer to the main manager
pNode->pData = Extra_TransferPermute( ddTemp, dd, pFunc, Vec_IntArray(vFanins) );
Cudd_Ref( (DdNode *)pNode->pData );
Cudd_RecursiveDeref( ddTemp, pFunc );
// update variable order
Vec_IntClear( vFanins );
for ( k = 0; k < nFaninsMax; k++ )
if ( ddTemp->invperm[k] < Abc_ObjFaninNum(pNode) )
Vec_IntPush( vFanins, Vec_IntEntry(&pNode->vFanins, ddTemp->invperm[k]) );
for ( k = 0; k < Abc_ObjFaninNum(pNode); k++ )
Vec_IntWriteEntry( &pNode->vFanins, k, Vec_IntEntry(vFanins, k) );
}
// printf( "Reorderings performed = %d.\n", Cudd_ReadReorderings(ddTemp) );
Extra_StopManager( ddTemp );
Vec_IntFreeP( &vFanins );
Hop_ManStop( (Hop_Man_t *)pNtk->pManFunc );
pNtk->pManFunc = dd;
// update the network type
pNtk->ntkFunc = ABC_FUNC_BDD;
return 1;
}
/**Function*************************************************************
Synopsis [Construct BDDs and mark AIG nodes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_ConvertAigToBdd_rec1( DdManager * dd, Hop_Obj_t * pObj )
{
assert( !Hop_IsComplement(pObj) );
if ( !Hop_ObjIsNode(pObj) || Hop_ObjIsMarkA(pObj) )
return;
Abc_ConvertAigToBdd_rec1( dd, Hop_ObjFanin0(pObj) );
Abc_ConvertAigToBdd_rec1( dd, Hop_ObjFanin1(pObj) );
pObj->pData = Cudd_bddAnd( dd, (DdNode *)Hop_ObjChild0Copy(pObj), (DdNode *)Hop_ObjChild1Copy(pObj) );
Cudd_Ref( (DdNode *)pObj->pData );
assert( !Hop_ObjIsMarkA(pObj) ); // loop detection
Hop_ObjSetMarkA( pObj );
}
/**Function*************************************************************
Synopsis [Dereference BDDs and unmark AIG nodes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_ConvertAigToBdd_rec2( DdManager * dd, Hop_Obj_t * pObj )
{
assert( !Hop_IsComplement(pObj) );
if ( !Hop_ObjIsNode(pObj) || !Hop_ObjIsMarkA(pObj) )
return;
Abc_ConvertAigToBdd_rec2( dd, Hop_ObjFanin0(pObj) );
Abc_ConvertAigToBdd_rec2( dd, Hop_ObjFanin1(pObj) );
Cudd_RecursiveDeref( dd, (DdNode *)pObj->pData );
pObj->pData = NULL;
assert( Hop_ObjIsMarkA(pObj) ); // loop detection
Hop_ObjClearMarkA( pObj );
}
/**Function*************************************************************
Synopsis [Converts the network from AIG to BDD representation.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
DdNode * Abc_ConvertAigToBdd( DdManager * dd, Hop_Obj_t * pRoot )
{
DdNode * bFunc;
// check the case of a constant
if ( Hop_ObjIsConst1( Hop_Regular(pRoot) ) )
return Cudd_NotCond( Cudd_ReadOne(dd), Hop_IsComplement(pRoot) );
// construct BDD
Abc_ConvertAigToBdd_rec1( dd, Hop_Regular(pRoot) );
// hold on to the result
bFunc = Cudd_NotCond( Hop_Regular(pRoot)->pData, Hop_IsComplement(pRoot) ); Cudd_Ref( bFunc );
// dereference BDD
Abc_ConvertAigToBdd_rec2( dd, Hop_Regular(pRoot) );
// return the result
Cudd_Deref( bFunc );
return bFunc;
}
/**Function*************************************************************
Synopsis [Construct BDDs and mark AIG nodes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_ConvertAigToAig_rec( Abc_Ntk_t * pNtkAig, Hop_Obj_t * pObj )
{
assert( !Hop_IsComplement(pObj) );
if ( !Hop_ObjIsNode(pObj) || Hop_ObjIsMarkA(pObj) )
return;
Abc_ConvertAigToAig_rec( pNtkAig, Hop_ObjFanin0(pObj) );
Abc_ConvertAigToAig_rec( pNtkAig, Hop_ObjFanin1(pObj) );
pObj->pData = Abc_AigAnd( (Abc_Aig_t *)pNtkAig->pManFunc, (Abc_Obj_t *)Hop_ObjChild0Copy(pObj), (Abc_Obj_t *)Hop_ObjChild1Copy(pObj) );
assert( !Hop_ObjIsMarkA(pObj) ); // loop detection
Hop_ObjSetMarkA( pObj );
}
/**Function*************************************************************
Synopsis [Converts the network from AIG to BDD representation.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Obj_t * Abc_ConvertAigToAig( Abc_Ntk_t * pNtkAig, Abc_Obj_t * pObjOld )
{
Hop_Man_t * pHopMan;
Hop_Obj_t * pRoot;
Abc_Obj_t * pFanin;
int i;
// get the local AIG
pHopMan = (Hop_Man_t *)pObjOld->pNtk->pManFunc;
pRoot = (Hop_Obj_t *)pObjOld->pData;
// check the case of a constant
if ( Hop_ObjIsConst1( Hop_Regular(pRoot) ) )
return Abc_ObjNotCond( Abc_AigConst1(pNtkAig), Hop_IsComplement(pRoot) );
// assign the fanin nodes
Abc_ObjForEachFanin( pObjOld, pFanin, i )
{
assert( pFanin->pCopy != NULL );
Hop_ManPi(pHopMan, i)->pData = pFanin->pCopy;
}
// construct the AIG
Abc_ConvertAigToAig_rec( pNtkAig, Hop_Regular(pRoot) );
Hop_ConeUnmark_rec( Hop_Regular(pRoot) );
// return the result
return Abc_ObjNotCond( (Abc_Obj_t *)Hop_Regular(pRoot)->pData, Hop_IsComplement(pRoot) );
}
/**Function*************************************************************
Synopsis [Unmaps the network.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkMapToSop( Abc_Ntk_t * pNtk )
{
extern void * Abc_FrameReadLibGen();
Abc_Obj_t * pNode;
char * pSop;
int i;
assert( Abc_NtkHasMapping(pNtk) );
// update the functionality manager
assert( pNtk->pManFunc == Abc_FrameReadLibGen() );
pNtk->pManFunc = Mem_FlexStart();
pNtk->ntkFunc = ABC_FUNC_SOP;
// update the nodes
Abc_NtkForEachNode( pNtk, pNode, i )
{
pSop = Mio_GateReadSop((Mio_Gate_t *)pNode->pData);
assert( Abc_SopGetVarNum(pSop) == Abc_ObjFaninNum(pNode) );
pNode->pData = Abc_SopRegister( (Mem_Flex_t *)pNtk->pManFunc, pSop );
}
return 1;
}
/**Function*************************************************************
Synopsis [Converts SOP functions into BLIF-MV functions.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkSopToBlifMv( Abc_Ntk_t * pNtk )
{
return 1;
}
/**Function*************************************************************
Synopsis [Convers logic network to the SOP form.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkToSop( Abc_Ntk_t * pNtk, int fDirect )
{
assert( !Abc_NtkIsStrash(pNtk) );
if ( Abc_NtkHasSop(pNtk) )
{
if ( !fDirect )
return 1;
if ( !Abc_NtkSopToBdd(pNtk) )
return 0;
return Abc_NtkBddToSop(pNtk, fDirect);
}
if ( Abc_NtkHasMapping(pNtk) )
return Abc_NtkMapToSop(pNtk);
if ( Abc_NtkHasBdd(pNtk) )
return Abc_NtkBddToSop(pNtk, fDirect);
if ( Abc_NtkHasAig(pNtk) )
{
if ( !Abc_NtkAigToBdd(pNtk) )
return 0;
return Abc_NtkBddToSop(pNtk, fDirect);
}
assert( 0 );
return 0;
}
/**Function*************************************************************
Synopsis [Convers logic network to the SOP form.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkToBdd( Abc_Ntk_t * pNtk )
{
assert( !Abc_NtkIsStrash(pNtk) );
if ( Abc_NtkHasBdd(pNtk) )
return 1;
if ( Abc_NtkHasMapping(pNtk) )
{
Abc_NtkMapToSop(pNtk);
return Abc_NtkSopToBdd(pNtk);
}
if ( Abc_NtkHasSop(pNtk) )
{
Abc_NtkSopToAig(pNtk);
return Abc_NtkAigToBdd(pNtk);
}
if ( Abc_NtkHasAig(pNtk) )
return Abc_NtkAigToBdd(pNtk);
assert( 0 );
return 0;
}
/**Function*************************************************************
Synopsis [Convers logic network to the SOP form.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkToAig( Abc_Ntk_t * pNtk )
{
assert( !Abc_NtkIsStrash(pNtk) );
if ( Abc_NtkHasAig(pNtk) )
return 1;
if ( Abc_NtkHasMapping(pNtk) )
{
Abc_NtkMapToSop(pNtk);
return Abc_NtkSopToAig(pNtk);
}
if ( Abc_NtkHasBdd(pNtk) )
{
if ( !Abc_NtkBddToSop(pNtk,0) )
return 0;
return Abc_NtkSopToAig(pNtk);
}
if ( Abc_NtkHasSop(pNtk) )
return Abc_NtkSopToAig(pNtk);
assert( 0 );
return 0;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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