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abc/src/opt/dau/dauGia.c

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/**CFile****************************************************************
FileName [dauGia.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [DAG-aware unmapping.]
Synopsis [Coverting DSD into GIA.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: dauGia.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "dauInt.h"
#include "aig/gia/gia.h"
#include "misc/util/utilTruth.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
extern int Kit_TruthToGia( Gia_Man_t * pMan, unsigned * pTruth, int nVars, Vec_Int_t * vMemory, Vec_Int_t * vLeaves, int fHash );
#define DAU_DSD_MAX_VAR 12
static int m_Calls = 0;
static int m_NonDsd = 0;
static int m_Non1Step = 0;
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Derives GIA for the truth table.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Dau_DsdToGiaCompose_rec( Gia_Man_t * pGia, word Func, int * pFanins, int nVars )
{
int t0, t1;
if ( Func == 0 )
return 0;
if ( Func == ~(word)0 )
return 1;
assert( nVars > 0 );
if ( --nVars == 0 )
{
assert( Func == s_Truths6[0] || Func == s_Truths6Neg[0] );
return Abc_LitNotCond( pFanins[0], (int)(Func == s_Truths6Neg[0]) );
}
if ( !Abc_Tt6HasVar(Func, nVars) )
return Dau_DsdToGiaCompose_rec( pGia, Func, pFanins, nVars );
t0 = Dau_DsdToGiaCompose_rec( pGia, Abc_Tt6Cofactor0(Func, nVars), pFanins, nVars );
t1 = Dau_DsdToGiaCompose_rec( pGia, Abc_Tt6Cofactor1(Func, nVars), pFanins, nVars );
if ( pGia->pMuxes )
return Gia_ManHashMuxReal( pGia, pFanins[nVars], t1, t0 );
else
return Gia_ManHashMux( pGia, pFanins[nVars], t1, t0 );
}
/**Function*************************************************************
Synopsis [Derives GIA for the DSD formula.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Dau_DsdToGia2_rec( Gia_Man_t * pGia, char * pStr, char ** p, int * pMatches, int * pLits, Vec_Int_t * vCover )
{
int fCompl = 0;
if ( **p == '!' )
(*p)++, fCompl = 1;
if ( **p >= 'a' && **p < 'a' + DAU_DSD_MAX_VAR ) // var
return Abc_LitNotCond( pLits[**p - 'a'], fCompl );
if ( **p == '(' ) // and/or
{
char * q = pStr + pMatches[ *p - pStr ];
int Res = 1, Lit;
assert( **p == '(' && *q == ')' );
for ( (*p)++; *p < q; (*p)++ )
{
Lit = Dau_DsdToGia2_rec( pGia, pStr, p, pMatches, pLits, vCover );
Res = Gia_ManHashAnd( pGia, Res, Lit );
}
assert( *p == q );
return Abc_LitNotCond( Res, fCompl );
}
if ( **p == '[' ) // xor
{
char * q = pStr + pMatches[ *p - pStr ];
int Res = 0, Lit;
assert( **p == '[' && *q == ']' );
for ( (*p)++; *p < q; (*p)++ )
{
Lit = Dau_DsdToGia2_rec( pGia, pStr, p, pMatches, pLits, vCover );
if ( pGia->pMuxes )
Res = Gia_ManHashXorReal( pGia, Res, Lit );
else
Res = Gia_ManHashXor( pGia, Res, Lit );
}
assert( *p == q );
return Abc_LitNotCond( Res, fCompl );
}
if ( **p == '<' ) // mux
{
int nVars = 0;
int Temp[3], * pTemp = Temp, Res;
int Fanins[DAU_DSD_MAX_VAR], * pLits2;
char * pOld = *p;
char * q = pStr + pMatches[ *p - pStr ];
// read fanins
if ( *(q+1) == '{' )
{
char * q2;
*p = q+1;
q2 = pStr + pMatches[ *p - pStr ];
assert( **p == '{' && *q2 == '}' );
for ( nVars = 0, (*p)++; *p < q2; (*p)++, nVars++ )
Fanins[nVars] = Dau_DsdToGia2_rec( pGia, pStr, p, pMatches, pLits, vCover );
assert( *p == q2 );
pLits2 = Fanins;
}
else
pLits2 = pLits;
// read MUX
*p = pOld;
q = pStr + pMatches[ *p - pStr ];
assert( **p == '<' && *q == '>' );
// verify internal variables
if ( nVars )
for ( ; pOld < q; pOld++ )
if ( *pOld >= 'a' && *pOld <= 'z' )
assert( *pOld - 'a' < nVars );
// derive MUX components
for ( (*p)++; *p < q; (*p)++ )
*pTemp++ = Dau_DsdToGia2_rec( pGia, pStr, p, pMatches, pLits2, vCover );
assert( pTemp == Temp + 3 );
assert( *p == q );
if ( *(q+1) == '{' ) // and/or
{
char * q = pStr + pMatches[ ++(*p) - pStr ];
assert( **p == '{' && *q == '}' );
*p = q;
}
if ( pGia->pMuxes )
Res = Gia_ManHashMuxReal( pGia, Temp[0], Temp[1], Temp[2] );
else
Res = Gia_ManHashMux( pGia, Temp[0], Temp[1], Temp[2] );
return Abc_LitNotCond( Res, fCompl );
}
if ( (**p >= 'A' && **p <= 'F') || (**p >= '0' && **p <= '9') )
{
Vec_Int_t vLeaves; char * q;
word pFunc[DAU_DSD_MAX_VAR > 6 ? (1 << (DAU_DSD_MAX_VAR-6)) : 1];
int Fanins[DAU_DSD_MAX_VAR], Res;
int i, nVars = Abc_TtReadHex( pFunc, *p );
*p += Abc_TtHexDigitNum( nVars );
q = pStr + pMatches[ *p - pStr ];
assert( **p == '{' && *q == '}' );
for ( i = 0, (*p)++; *p < q; (*p)++, i++ )
Fanins[i] = Dau_DsdToGia2_rec( pGia, pStr, p, pMatches, pLits, vCover );
assert( i == nVars );
assert( *p == q );
// Res = Dau_DsdToGia2Compose_rec( pGia, Func, Fanins, nVars );
vLeaves.nCap = nVars;
vLeaves.nSize = nVars;
vLeaves.pArray = Fanins;
Res = Kit_TruthToGia( pGia, (unsigned *)pFunc, nVars, vCover, &vLeaves, 1 );
m_Non1Step++;
return Abc_LitNotCond( Res, fCompl );
}
assert( 0 );
return 0;
}
int Dau_DsdToGia2( Gia_Man_t * pGia, char * p, int * pLits, Vec_Int_t * vCover )
{
int Res;
if ( *p == '0' && *(p+1) == 0 )
Res = 0;
else if ( *p == '1' && *(p+1) == 0 )
Res = 1;
else
Res = Dau_DsdToGia2_rec( pGia, p, &p, Dau_DsdComputeMatches(p), pLits, vCover );
assert( *++p == 0 );
return Res;
}
/**Function*************************************************************
Synopsis [Derives GIA for the DSD formula.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Dau_DsdAddToArray( Gia_Man_t * pGia, int * pFans, int nFans, int iFan )
{
int i;
pFans[nFans] = iFan;
if ( nFans == 0 )
return;
for ( i = nFans; i > 0; i-- )
{
if ( Gia_ObjLevelId(pGia, Abc_Lit2Var(pFans[i])) <= Gia_ObjLevelId(pGia, Abc_Lit2Var(pFans[i-1])) )
return;
ABC_SWAP( int, pFans[i], pFans[i-1] );
}
}
int Dau_DsdBalance( Gia_Man_t * pGia, int * pFans, int nFans, int fAnd )
{
Gia_Obj_t * pObj;
int iFan0, iFan1, iFan;
if ( nFans == 1 )
return pFans[0];
assert( nFans > 1 );
iFan0 = pFans[--nFans];
iFan1 = pFans[--nFans];
if ( Vec_IntSize(&pGia->vHTable) == 0 )
{
if ( fAnd )
iFan = Gia_ManAppendAnd2( pGia, iFan0, iFan1 );
else if ( pGia->pMuxes )
{
int fCompl = Abc_LitIsCompl(iFan0) ^ Abc_LitIsCompl(iFan1);
iFan = Gia_ManAppendXorReal( pGia, Abc_LitRegular(iFan0), Abc_LitRegular(iFan1) );
iFan = Abc_LitNotCond( iFan, fCompl );
}
else
iFan = Gia_ManAppendXor2( pGia, iFan0, iFan1 );
}
else
{
if ( fAnd )
iFan = Gia_ManHashAnd( pGia, iFan0, iFan1 );
else if ( pGia->pMuxes )
iFan = Gia_ManHashXorReal( pGia, iFan0, iFan1 );
else
iFan = Gia_ManHashXor( pGia, iFan0, iFan1 );
}
pObj = Gia_ManObj(pGia, Abc_Lit2Var(iFan));
if ( Gia_ObjIsAnd(pObj) )
{
if ( fAnd )
Gia_ObjSetAndLevel( pGia, pObj );
else if ( pGia->pMuxes )
Gia_ObjSetXorLevel( pGia, pObj );
else
{
if ( Gia_ObjIsAnd(Gia_ObjFanin0(pObj)) )
Gia_ObjSetAndLevel( pGia, Gia_ObjFanin0(pObj) );
if ( Gia_ObjIsAnd(Gia_ObjFanin1(pObj)) )
Gia_ObjSetAndLevel( pGia, Gia_ObjFanin1(pObj) );
Gia_ObjSetAndLevel( pGia, pObj );
}
}
Dau_DsdAddToArray( pGia, pFans, nFans++, iFan );
return Dau_DsdBalance( pGia, pFans, nFans, fAnd );
}
int Dau_DsdToGia_rec( Gia_Man_t * pGia, char * pStr, char ** p, int * pMatches, int * pLits, Vec_Int_t * vCover )
{
int fCompl = 0;
if ( **p == '!' )
(*p)++, fCompl = 1;
if ( **p >= 'a' && **p < 'a' + DAU_DSD_MAX_VAR ) // var
return Abc_LitNotCond( pLits[**p - 'a'], fCompl );
if ( **p == '(' ) // and/or
{
char * q = pStr + pMatches[ *p - pStr ];
int pFans[DAU_DSD_MAX_VAR], nFans = 0, Fan;
assert( **p == '(' && *q == ')' );
for ( (*p)++; *p < q; (*p)++ )
{
Fan = Dau_DsdToGia_rec( pGia, pStr, p, pMatches, pLits, vCover );
Dau_DsdAddToArray( pGia, pFans, nFans++, Fan );
}
Fan = Dau_DsdBalance( pGia, pFans, nFans, 1 );
assert( *p == q );
return Abc_LitNotCond( Fan, fCompl );
}
if ( **p == '[' ) // xor
{
char * q = pStr + pMatches[ *p - pStr ];
int pFans[DAU_DSD_MAX_VAR], nFans = 0, Fan;
assert( **p == '[' && *q == ']' );
for ( (*p)++; *p < q; (*p)++ )
{
Fan = Dau_DsdToGia_rec( pGia, pStr, p, pMatches, pLits, vCover );
Dau_DsdAddToArray( pGia, pFans, nFans++, Fan );
}
Fan = Dau_DsdBalance( pGia, pFans, nFans, 0 );
assert( *p == q );
return Abc_LitNotCond( Fan, fCompl );
}
if ( **p == '<' ) // mux
{
Gia_Obj_t * pObj;
int nVars = 0;
int Temp[3], * pTemp = Temp, Res;
int Fanins[DAU_DSD_MAX_VAR], * pLits2;
char * pOld = *p;
char * q = pStr + pMatches[ *p - pStr ];
// read fanins
if ( *(q+1) == '{' )
{
char * q2;
*p = q+1;
q2 = pStr + pMatches[ *p - pStr ];
assert( **p == '{' && *q2 == '}' );
for ( nVars = 0, (*p)++; *p < q2; (*p)++, nVars++ )
Fanins[nVars] = Dau_DsdToGia_rec( pGia, pStr, p, pMatches, pLits, vCover );
assert( *p == q2 );
pLits2 = Fanins;
}
else
pLits2 = pLits;
// read MUX
*p = pOld;
q = pStr + pMatches[ *p - pStr ];
assert( **p == '<' && *q == '>' );
// verify internal variables
if ( nVars )
for ( ; pOld < q; pOld++ )
if ( *pOld >= 'a' && *pOld <= 'z' )
assert( *pOld - 'a' < nVars );
// derive MUX components
for ( (*p)++; *p < q; (*p)++ )
*pTemp++ = Dau_DsdToGia_rec( pGia, pStr, p, pMatches, pLits2, vCover );
assert( pTemp == Temp + 3 );
assert( *p == q );
if ( *(q+1) == '{' ) // and/or
{
char * q = pStr + pMatches[ ++(*p) - pStr ];
assert( **p == '{' && *q == '}' );
*p = q;
}
if ( Vec_IntSize(&pGia->vHTable) == 0 )
{
if ( pGia->pMuxes )
Res = Gia_ManAppendMux( pGia, Temp[0], Temp[1], Temp[2] );
else
Res = Gia_ManAppendMux2( pGia, Temp[0], Temp[1], Temp[2] );
}
else
{
if ( pGia->pMuxes )
Res = Gia_ManHashMuxReal( pGia, Temp[0], Temp[1], Temp[2] );
else
Res = Gia_ManHashMux( pGia, Temp[0], Temp[1], Temp[2] );
}
pObj = Gia_ManObj(pGia, Abc_Lit2Var(Res));
if ( Gia_ObjIsAnd(pObj) )
{
if ( pGia->pMuxes && Vec_IntSize(&pGia->vHTable) )
Gia_ObjSetMuxLevel( pGia, pObj );
else
{
if ( Gia_ObjIsAnd(Gia_ObjFanin0(pObj)) )
Gia_ObjSetAndLevel( pGia, Gia_ObjFanin0(pObj) );
if ( Gia_ObjIsAnd(Gia_ObjFanin1(pObj)) )
Gia_ObjSetAndLevel( pGia, Gia_ObjFanin1(pObj) );
Gia_ObjSetAndLevel( pGia, pObj );
}
}
return Abc_LitNotCond( Res, fCompl );
}
if ( (**p >= 'A' && **p <= 'F') || (**p >= '0' && **p <= '9') )
{
Vec_Int_t vLeaves; char * q;
word pFunc[DAU_DSD_MAX_VAR > 6 ? (1 << (DAU_DSD_MAX_VAR-6)) : 1];
int Fanins[DAU_DSD_MAX_VAR], Res, nObjOld;
int i, nVars = Abc_TtReadHex( pFunc, *p );
*p += Abc_TtHexDigitNum( nVars );
q = pStr + pMatches[ *p - pStr ];
assert( **p == '{' && *q == '}' );
for ( i = 0, (*p)++; *p < q; (*p)++, i++ )
Fanins[i] = Dau_DsdToGia_rec( pGia, pStr, p, pMatches, pLits, vCover );
assert( i == nVars );
assert( *p == q );
vLeaves.nCap = nVars;
vLeaves.nSize = nVars;
vLeaves.pArray = Fanins;
nObjOld = Gia_ManObjNum(pGia);
Res = Kit_TruthToGia( pGia, (unsigned *)pFunc, nVars, vCover, &vLeaves, Vec_IntSize(&pGia->vHTable) != 0 );
// assert( nVars <= 6 );
// Res = Dau_DsdToGiaCompose_rec( pGia, pFunc[0], Fanins, nVars );
for ( i = nObjOld; i < Gia_ManObjNum(pGia); i++ )
Gia_ObjSetGateLevel( pGia, Gia_ManObj(pGia, i) );
m_Non1Step++;
return Abc_LitNotCond( Res, fCompl );
}
assert( 0 );
return 0;
}
int Dau_DsdToGia( Gia_Man_t * pGia, char * p, int * pLits, Vec_Int_t * vCover )
{
int Res;
if ( *p == '0' && *(p+1) == 0 )
Res = 0;
else if ( *p == '1' && *(p+1) == 0 )
Res = 1;
else
Res = Dau_DsdToGia_rec( pGia, p, &p, Dau_DsdComputeMatches(p), pLits, vCover );
assert( *++p == 0 );
return Res;
}
/**Function*************************************************************
Synopsis [Convert TT to GIA via DSD.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Dsm_ManTruthToGia( void * p, word * pTruth, Vec_Int_t * vLeaves, Vec_Int_t * vCover )
{
int fUseMuxes = 0;
int fDelayBalance = 1;
Gia_Man_t * pGia = (Gia_Man_t *)p;
int nSizeNonDec;
char pDsd[1000];
word pTruthCopy[DAU_MAX_WORD];
Abc_TtCopy( pTruthCopy, pTruth, Abc_TtWordNum(Vec_IntSize(vLeaves)), 0 );
m_Calls++;
assert( Vec_IntSize(vLeaves) <= DAU_DSD_MAX_VAR );
// collect delay information
if ( fDelayBalance && fUseMuxes )
{
int i, iLit, pVarLevels[DAU_DSD_MAX_VAR];
Vec_IntForEachEntry( vLeaves, iLit, i )
pVarLevels[i] = Gia_ObjLevelId( pGia, Abc_Lit2Var(iLit) );
nSizeNonDec = Dau_DsdDecomposeLevel( pTruthCopy, Vec_IntSize(vLeaves), fUseMuxes, 1, pDsd, pVarLevels );
}
else
nSizeNonDec = Dau_DsdDecompose( pTruthCopy, Vec_IntSize(vLeaves), fUseMuxes, 1, pDsd );
if ( nSizeNonDec )
m_NonDsd++;
// printf( "%s\n", pDsd );
if ( fDelayBalance && pGia->vLevels )
return Dau_DsdToGia( pGia, pDsd, Vec_IntArray(vLeaves), vCover );
else
return Dau_DsdToGia2( pGia, pDsd, Vec_IntArray(vLeaves), vCover );
}
/**Function*************************************************************
Synopsis [Convert TT to GIA via DSD.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Dsm_ManReportStats()
{
printf( "Calls = %d. NonDSD = %d. Non1Step = %d.\n", m_Calls, m_NonDsd, m_Non1Step );
m_Calls = m_NonDsd = m_Non1Step = 0;
}
/**Function*************************************************************
Synopsis [Performs structural hashing on the LUT functions.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void * Dsm_ManDeriveGia( void * pGia, int fUseMuxes )
{
Gia_Man_t * p = (Gia_Man_t *)pGia;
Gia_Man_t * pNew, * pTemp;
Vec_Int_t * vCover, * vLeaves;
Gia_Obj_t * pObj;
int k, i, iLut, iVar;
word * pTruth;
assert( Gia_ManHasMapping(p) );
// create new manager
pNew = Gia_ManStart( 6*Gia_ManObjNum(p)/5 + 100 );
pNew->pName = Abc_UtilStrsav( p->pName );
pNew->pSpec = Abc_UtilStrsav( p->pSpec );
pNew->vLevels = Vec_IntStart( 6*Gia_ManObjNum(p)/5 + 100 );
if ( fUseMuxes )
pNew->pMuxes = ABC_CALLOC( unsigned, pNew->nObjsAlloc );
// map primary inputs
Gia_ManFillValue(p);
Gia_ManConst0(p)->Value = 0;
Gia_ManForEachCi( p, pObj, i )
pObj->Value = Gia_ManAppendCi(pNew);
// iterate through nodes used in the mapping
vLeaves = Vec_IntAlloc( 16 );
vCover = Vec_IntAlloc( 1 << 16 );
Gia_ManHashStart( pNew );
Gia_ObjComputeTruthTableStart( p, Gia_ManLutSizeMax(p) );
Gia_ManForEachAnd( p, pObj, iLut )
{
if ( Gia_ObjIsBuf(pObj) )
{
pObj->Value = Gia_ManAppendBuf( pNew, Gia_ObjFanin0Copy(pObj) );
continue;
}
if ( !Gia_ObjIsLut(p, iLut) )
continue;
// collect leaves
Vec_IntClear( vLeaves );
Gia_LutForEachFanin( p, iLut, iVar, k )
Vec_IntPush( vLeaves, iVar );
pTruth = Gia_ObjComputeTruthTableCut( p, Gia_ManObj(p, iLut), vLeaves );
// collect incoming literals
Vec_IntClear( vLeaves );
Gia_LutForEachFanin( p, iLut, iVar, k )
Vec_IntPush( vLeaves, Gia_ManObj(p, iVar)->Value );
Gia_ManObj(p, iLut)->Value = Dsm_ManTruthToGia( pNew, pTruth, vLeaves, vCover );
}
Gia_ObjComputeTruthTableStop( p );
Gia_ManForEachCo( p, pObj, i )
pObj->Value = Gia_ManAppendCo( pNew, Gia_ObjFanin0Copy(pObj) );
Gia_ManHashStop( pNew );
Gia_ManSetRegNum( pNew, Gia_ManRegNum(p) );
Vec_IntFree( vLeaves );
Vec_IntFree( vCover );
/*
Gia_ManForEachAnd( pNew, pObj, i )
{
int iLev = Gia_ObjLevelId(pNew, i);
int iLev0 = Gia_ObjLevelId(pNew, Gia_ObjFaninId0(pObj, i));
int iLev1 = Gia_ObjLevelId(pNew, Gia_ObjFaninId1(pObj, i));
assert( iLev == 1 + Abc_MaxInt(iLev0, iLev1) );
}
*/
// perform cleanup
pNew = Gia_ManCleanup( pTemp = pNew );
Gia_ManStop( pTemp );
return pNew;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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