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Logic sharing for multi-input gates.

This commit is contained in:
Alan Mishchenko 2012-03-25 16:49:29 -07:00
parent 309bcf2dec
commit b4df114e4a
6 changed files with 606 additions and 462 deletions
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4
abclib.dsp
View File

@ -423,10 +423,6 @@ SOURCE=.\src\base\abci\abcSense.c
# End Source File
# Begin Source File
SOURCE=.\src\base\abci\abcShare.c
# End Source File
# Begin Source File
SOURCE=.\src\base\abci\abcSpeedup.c
# End Source File
# Begin Source File

2
src/base/abc/abc.h
View File

@ -572,6 +572,7 @@ extern ABC_DLL void Abc_NodeFreeCuts( void * p, Abc_Obj_t * pObj )
/*=== abcDar.c ============================================================*/
extern ABC_DLL int Abc_NtkPhaseFrameNum( Abc_Ntk_t * pNtk );
extern ABC_DLL int Abc_NtkDarPrintCone( Abc_Ntk_t * pNtk );
extern ABC_DLL Abc_Ntk_t * Abc_NtkBalanceExor( Abc_Ntk_t * pNtk, int fUpdateLevel, int fVerbose );
/*=== abcDelay.c ==========================================================*/
extern ABC_DLL float Abc_NtkDelayTraceLut( Abc_Ntk_t * pNtk, int fUseLutLib );
/*=== abcDfs.c ==========================================================*/
@ -852,6 +853,7 @@ extern ABC_DLL word Abc_SopToTruth( char * pSop, int nInputs );
extern ABC_DLL void Abc_SopToTruth7( char * pSop, int nInputs, word r[2] );
extern ABC_DLL void Abc_SopToTruthBig( char * pSop, int nInputs, word ** pVars, word * pCube, word * pRes );
/*=== abcStrash.c ==========================================================*/
extern ABC_DLL Abc_Ntk_t * Abc_NtkRestrash( Abc_Ntk_t * pNtk, int fCleanup );
extern ABC_DLL Abc_Ntk_t * Abc_NtkStrash( Abc_Ntk_t * pNtk, int fAllNodes, int fCleanup, int fRecord );
extern ABC_DLL Abc_Obj_t * Abc_NodeStrash( Abc_Ntk_t * pNtkNew, Abc_Obj_t * pNode, int fRecord );
extern ABC_DLL int Abc_NtkAppend( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int fAddPos );

95
src/base/abci/abc.c
View File

@ -115,6 +115,7 @@ static int Abc_CommandRestructure ( Abc_Frame_t * pAbc, int argc, cha
static int Abc_CommandResubstitute ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRr ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandCascade ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandExtract ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandLogic ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandComb ( Abc_Frame_t * pAbc, int argc, char ** argv );
@ -560,6 +561,7 @@ void Abc_Init( Abc_Frame_t * pAbc )
Cmd_CommandAdd( pAbc, "Synthesis", "resub", Abc_CommandResubstitute, 1 );
// Cmd_CommandAdd( pAbc, "Synthesis", "rr", Abc_CommandRr, 1 );
Cmd_CommandAdd( pAbc, "Synthesis", "cascade", Abc_CommandCascade, 1 );
Cmd_CommandAdd( pAbc, "Synthesis", "extract", Abc_CommandExtract, 1 );
Cmd_CommandAdd( pAbc, "Various", "logic", Abc_CommandLogic, 1 );
Cmd_CommandAdd( pAbc, "Various", "comb", Abc_CommandComb, 1 );
@ -2805,7 +2807,6 @@ int Abc_CommandBalance( Abc_Frame_t * pAbc, int argc, char ** argv )
int fUpdateLevel;
int fExor;
int fVerbose;
extern Abc_Ntk_t * Abc_NtkBalanceExor( Abc_Ntk_t * pNtk, int fUpdateLevel, int fVerbose );
pNtk = Abc_FrameReadNtk(pAbc);
// set defaults
@ -5381,6 +5382,88 @@ usage:
return 1;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_CommandExtract( Abc_Frame_t * pAbc, int argc, char ** argv )
{
extern Abc_Ntk_t * Abc_NtkShareXor( Abc_Ntk_t * pNtk, int nMultiSize, int fAnd, int fVerbose );
Abc_Ntk_t * pNtk, * pNtkRes;
int c, nMultiSize, fAnd, fVerbose;
pNtk = Abc_FrameReadNtk(pAbc);
// set defaults
nMultiSize = 3;
fAnd = 0;
fVerbose = 0;
Extra_UtilGetoptReset();
while ( ( c = Extra_UtilGetopt( argc, argv, "Kavh" ) ) != EOF )
{
switch ( c )
{
case 'K':
if ( globalUtilOptind >= argc )
{
Abc_Print( -1, "Command line switch \"-K\" should be followed by an integer.\n" );
goto usage;
}
nMultiSize = atoi(argv[globalUtilOptind]);
globalUtilOptind++;
if ( nMultiSize < 0 )
goto usage;
break;
case 'a':
fAnd ^= 1;
break;
case 'v':
fVerbose ^= 1;
break;
case 'h':
goto usage;
default:
goto usage;
}
}
if ( pNtk == NULL )
{
Abc_Print( -1, "Empty network.\n" );
return 1;
}
if ( !Abc_NtkIsStrash(pNtk) )
{
Abc_Print( -1, "Can only collapse a logic network or an AIG.\n" );
return 1;
}
// get the new network
pNtkRes = Abc_NtkShareXor( pNtk, nMultiSize, fAnd, fVerbose );
if ( pNtkRes == NULL )
{
Abc_Print( -1, "Cascade synthesis has failed.\n" );
return 1;
}
// replace the current network
Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
return 0;
usage:
Abc_Print( -2, "usage: extract [-K <num>] [-vh]\n" );
Abc_Print( -2, "\t extracts logic sharing from multi-input XOR gates\n" );
Abc_Print( -2, "\t-K <num> : the min gate size to consider for extraction [default = %d]\n", nMultiSize );
// Abc_Print( -2, "\t-a : toggle multi-input XOR vs multi-input AND [default = %s]\n", fAnd? "AND": "XOR" );
Abc_Print( -2, "\t-v : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
Abc_Print( -2, "\t-h : print the command usage\n");
Abc_Print( -2, "\t \n");
return 1;
}
/**Function*************************************************************
@ -9020,8 +9103,14 @@ int Abc_CommandTest( Abc_Frame_t * pAbc, int argc, char ** argv )
}
Aig_ManStop( pAig );
*/
extern void Abc_NtkShareXor( Abc_Ntk_t * pNtk );
Abc_NtkShareXor( pNtk );
/*
extern Abc_Ntk_t * Abc_NtkShareXor( Abc_Ntk_t * pNtk );
Abc_Ntk_t * pNtkRes = Abc_NtkShareXor( pNtk );
if ( pNtkRes == NULL )
printf( "Transformation has failed.\n" );
else
Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
*/
}
// Abc2_NtkTestGia( "", 1 );

510
src/base/abci/abcExtract.c
View File

@ -1,12 +1,12 @@
/**CFile****************************************************************
FileName [abcMvCost.c]
FileName [abcShare.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Network and node package.]
Synopsis [Calculating the cost of one MV block.]
Synopsis [Shared logic extraction.]
Author [Alan Mishchenko]
@ -14,7 +14,7 @@
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: abcMvCost.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
Revision [$Id: abcShare.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
@ -22,15 +22,141 @@
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
#define SHARE_NUM 2
typedef struct Abc_ShaMan_t_ Abc_ShaMan_t;
struct Abc_ShaMan_t_
{
int nMultiSize;
int fVerbose;
Abc_Ntk_t * pNtk;
Vec_Ptr_t * vBuckets;
Vec_Int_t * vObj2Lit;
int nStartCols;
int nCountXors;
int nFoundXors;
};
static inline word Abc_NtkSharePack( int Lev, int Id ) { return (((word)Lev) << 32) | Id; }
static inline int Abc_NtkShareUnpackLev( word Num ) { return (Num >> 32); }
static inline int Abc_NtkShareUnpackId( word Num ) { return Num & 0xFFFF; }
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Working with the manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_ShaMan_t * Abc_ShaManStart( Abc_Ntk_t * pNtk )
{
Abc_ShaMan_t * p;
p = ABC_CALLOC( Abc_ShaMan_t, 1 );
p->pNtk = pNtk;
p->vObj2Lit = Vec_IntAlloc( 1000 );
return p;
}
void Abc_ShaManStop( Abc_ShaMan_t * p )
{
Vec_Ptr_t * vBucket;
int i;
Vec_PtrForEachEntry( Vec_Ptr_t *, p->vBuckets, vBucket, i )
Vec_VecFree( (Vec_Vec_t *)vBucket );
Vec_PtrFreeP( &p->vBuckets );
Vec_IntFreeP( &p->vObj2Lit );
ABC_FREE( p );
}
/**Function*************************************************************
Synopsis [Collects one multi-input XOR.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Wrd_t * Abc_NtkShareSuperXor( Abc_Obj_t * pObjInit, int * pfCompl, int * pCounter )
{
int fCompl = Abc_ObjIsComplement(pObjInit);
Abc_Obj_t * pObj = Abc_ObjRegular(pObjInit);
Abc_Ntk_t * pNtk = Abc_ObjNtk(pObj);
Abc_Obj_t * pObjC, * pObj0, * pObj1, * pRoot;
Vec_Wrd_t * vSuper;
word Num, NumNext;
int i, k;
assert( Abc_NodeIsExorType(pObj) );
// start iteration
vSuper = Vec_WrdAlloc( 10 );
Vec_WrdPush( vSuper, Abc_NtkSharePack(Abc_ObjLevel(pObj), Abc_ObjId(pObj)) );
while ( Vec_WrdSize(vSuper) > 0 )
{
// make sure there are no duplicates
Num = Vec_WrdEntry( vSuper, 0 );
Vec_WrdForEachEntryStart( vSuper, NumNext, i, 1 )
{
assert( Num != NumNext );
Num = NumNext;
}
// extract XOR gate decomposable on the topmost level
Vec_WrdForEachEntryReverse( vSuper, Num, i )
{
pRoot = Abc_NtkObj( pNtk, Abc_NtkShareUnpackId(Num) );
if ( Abc_NodeIsExorType(pRoot) )
{
Vec_WrdRemove( vSuper, Num );
break;
}
}
if ( i == -1 )
break;
// extract
pObjC = Abc_NodeRecognizeMux( pRoot, &pObj1, &pObj0 );
assert( pObj1 == Abc_ObjNot(pObj0) );
fCompl ^= Abc_ObjIsComplement(pObjC); pObjC = Abc_ObjRegular(pObjC);
fCompl ^= Abc_ObjIsComplement(pObj0); pObj0 = Abc_ObjRegular(pObj0);
Vec_WrdPushOrder( vSuper, Abc_NtkSharePack(Abc_ObjLevel(pObjC), Abc_ObjId(pObjC)) );
Vec_WrdPushOrder( vSuper, Abc_NtkSharePack(Abc_ObjLevel(pObj0), Abc_ObjId(pObj0)) );
(*pCounter)++;
// remove duplicates
k = 0;
Vec_WrdForEachEntry( vSuper, Num, i )
{
if ( i + 1 == Vec_WrdSize(vSuper) )
{
Vec_WrdWriteEntry( vSuper, k++, Num );
break;
}
NumNext = Vec_WrdEntry( vSuper, i+1 );
assert( Num <= NumNext );
if ( Num == NumNext )
i++;
else
Vec_WrdWriteEntry( vSuper, k++, Num );
}
Vec_WrdShrink( vSuper, k );
}
*pfCompl = fCompl;
Vec_WrdForEachEntry( vSuper, Num, i )
Vec_WrdWriteEntry( vSuper, i, Abc_NtkShareUnpackId(Num) );
return vSuper;
}
/**Function*************************************************************
Synopsis []
@ -42,11 +168,385 @@ ABC_NAMESPACE_IMPL_START
SeeAlso []
***********************************************************************/
void Abc_MvCostTest( Abc_Ntk_t * pNtk )
void Abc_NtkSharePrint( Abc_ShaMan_t * p )
{
Vec_Ptr_t * vBucket;
Vec_Int_t * vInput;
int i, k, j, ObjId;
char * pBuffer = ABC_ALLOC( char, Vec_IntSize(p->vObj2Lit) + 1 );
int * pCounters = ABC_CALLOC( int, Vec_IntSize(p->vObj2Lit) + 1 );
int nTotal = 0;
Vec_PtrForEachEntry( Vec_Ptr_t *, p->vBuckets, vBucket, i )
Vec_PtrForEachEntry( Vec_Int_t *, vBucket, vInput, j )
{
for ( k = 0; k < Vec_IntSize(p->vObj2Lit); k++ )
pBuffer[k] = '0';
pBuffer[k] = 0;
Vec_IntForEachEntryStart( vInput, ObjId, k, SHARE_NUM )
{
assert( ObjId < Vec_IntSize(p->vObj2Lit) );
pBuffer[ObjId] = '1';
pCounters[ObjId]++;
}
printf( "%4d%3d: %s\n", Vec_IntEntry(vInput, 0), Vec_IntEntry(vInput, 1), pBuffer );
}
for ( i = 0; i < Vec_IntSize(p->vObj2Lit); i++ )
if ( pCounters[i] > 0 )
printf( "%d=%d ", i, pCounters[i] );
printf( "\n" );
nTotal = 0;
for ( i = 0; i < p->nStartCols; i++ )
nTotal += pCounters[i] - 1;
printf( "Total = %d. ", nTotal );
printf( "Xors = %d.\n", Vec_IntSize(p->vObj2Lit) - p->nStartCols + nTotal );
ABC_FREE( pCounters );
ABC_FREE( pBuffer );
printf( "Bucket contents: " );
Vec_PtrForEachEntry( Vec_Ptr_t *, p->vBuckets, vBucket, i )
printf( "%d ", Vec_PtrSize(vBucket) );
printf( "\n" );
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkShareFindBestMatch( Vec_Ptr_t * vBuckets, Vec_Int_t ** pvInput, Vec_Int_t ** pvInput2 )
{
int nPoolSize = 40;
Vec_Ptr_t * vPool = Vec_PtrAlloc( nPoolSize );
Vec_Ptr_t * vBucket;
Vec_Int_t * vInput, * vInput2, * vInputBest = NULL, * vInputBest2 = NULL;
int i, k, Cost, CostBest = 0, Delay, DelayBest = 0;
Vec_PtrForEachEntryReverse( Vec_Ptr_t *, vBuckets, vBucket, i )
Vec_PtrForEachEntry( Vec_Int_t *, vBucket, vInput, k )
{
Vec_PtrPush( vPool, vInput );
if ( Vec_PtrSize(vPool) == nPoolSize )
goto outside;
}
outside:
Vec_PtrForEachEntryReverse( Vec_Int_t *, vPool, vInput, i )
Vec_PtrForEachEntryReverse( Vec_Int_t *, vPool, vInput2, k )
{
if ( i == k )
continue;
vInput->pArray += SHARE_NUM;
vInput2->pArray += SHARE_NUM;
vInput->nSize -= SHARE_NUM;
vInput2->nSize -= SHARE_NUM;
Cost = Vec_IntTwoCountCommon(vInput, vInput2);
vInput->pArray -= SHARE_NUM;
vInput2->pArray -= SHARE_NUM;
vInput->nSize += SHARE_NUM;
vInput2->nSize += SHARE_NUM;
if ( Cost < 2 )
continue;
Delay = Abc_MaxInt( Vec_IntEntry(vInput, 1), Vec_IntEntry(vInput2, 1) );
if ( CostBest < Cost || (CostBest == Cost && (DelayBest > Delay)) )
{
CostBest = Cost;
DelayBest = Delay;
vInputBest = vInput;
vInputBest2 = vInput2;
}
}
Vec_PtrFree( vPool );
*pvInput = vInputBest;
*pvInput2 = vInputBest2;
if ( vInputBest == NULL )
return;
Vec_PtrRemove( (Vec_Ptr_t *)Vec_PtrEntry(vBuckets, Vec_IntSize(vInputBest)-SHARE_NUM), (Vec_Int_t *)vInputBest );
Vec_PtrRemove( (Vec_Ptr_t *)Vec_PtrEntry(vBuckets, Vec_IntSize(vInputBest2)-SHARE_NUM), (Vec_Int_t *)vInputBest2 );
}
void Abc_NtkShareOptimize( Abc_ShaMan_t * p )
{
Abc_Obj_t * pObj, * pObj0, * pObj1;
Vec_Int_t * vInput, * vInput2;
Vec_Int_t * vNew, * vOld1, * vOld2;
int i;
for ( i = 0; ; i++ )
{
Abc_NtkShareFindBestMatch( p->vBuckets, &vInput, &vInput2 );
if ( vInput == NULL )
break;
// create new node
pObj0 = Abc_ObjFromLit( p->pNtk, Vec_IntEntry(vInput, 0) );
pObj1 = Abc_ObjFromLit( p->pNtk, Vec_IntEntry(vInput2, 0) );
pObj = Abc_AigXor( (Abc_Aig_t *)p->pNtk->pManFunc, pObj0, pObj1 );
p->nCountXors++;
// save new node
vOld1 = Vec_IntAlloc( 16 ); Vec_IntPush( vOld1, Vec_IntEntry(vInput, 0) ); Vec_IntPush( vOld1, Vec_IntEntry(vInput, 1) );
vOld2 = Vec_IntAlloc( 16 ); Vec_IntPush( vOld2, Vec_IntEntry(vInput2, 0) ); Vec_IntPush( vOld2, Vec_IntEntry(vInput2, 1) );
vNew = Vec_IntAlloc( 16 ); Vec_IntPush( vNew, Abc_ObjToLit(pObj) ); Vec_IntPush( vNew, Abc_ObjLevel(Abc_ObjRegular(pObj)) );
// compute new arrays
vInput->pArray += SHARE_NUM;
vInput2->pArray += SHARE_NUM;
vInput->nSize -= SHARE_NUM;
vInput2->nSize -= SHARE_NUM;
Vec_IntTwoSplit( vInput, vInput2, vNew, vOld1, vOld2 );
vInput->pArray -= SHARE_NUM;
vInput2->pArray -= SHARE_NUM;
vInput->nSize += SHARE_NUM;
vInput2->nSize += SHARE_NUM;
// add to the old ones
Vec_IntPush( vOld1, Vec_IntSize(p->vObj2Lit) );
Vec_IntPush( vOld2, Vec_IntSize(p->vObj2Lit) );
Vec_IntPush( p->vObj2Lit, Abc_ObjToLit(pObj) );
Vec_PtrPush( (Vec_Ptr_t *)Vec_PtrEntry(p->vBuckets, Vec_IntSize(vOld1)-SHARE_NUM), vOld1 );
Vec_PtrPush( (Vec_Ptr_t *)Vec_PtrEntry(p->vBuckets, Vec_IntSize(vOld2)-SHARE_NUM), vOld2 );
Vec_PtrPush( (Vec_Ptr_t *)Vec_PtrEntry(p->vBuckets, Vec_IntSize(vNew)-SHARE_NUM), vNew );
Vec_IntFree( vInput );
Vec_IntFree( vInput2 );
}
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkUpdateNetwork( Abc_ShaMan_t * p )
{
Abc_Ntk_t * pNtk;
Vec_Int_t * vInput, * vMap2Repl;
Vec_Ptr_t * vOrig, * vRepl, * vBucket;
Abc_Obj_t * pObj, * pNew;
int i, j, k, ObjId, iLit;
vOrig = Vec_PtrAlloc( p->nStartCols );
vRepl = Vec_PtrAlloc( p->nStartCols );
for ( i = 0; i < p->nStartCols; i++ )
{
iLit = Vec_IntEntry( p->vObj2Lit, i );
pObj = Abc_NtkObj( p->pNtk, Abc_Lit2Var(iLit) );
pNew = Abc_ObjNotCond( Abc_AigConst1(p->pNtk), !Abc_LitIsCompl(iLit) );
Vec_PtrPush( vOrig, pObj );
Vec_PtrPush( vRepl, pNew );
p->nCountXors--;
}
// go through the columns
Vec_PtrForEachEntry( Vec_Ptr_t *, p->vBuckets, vBucket, i )
Vec_PtrForEachEntry( Vec_Int_t *, vBucket, vInput, j )
{
Vec_IntForEachEntryStart( vInput, ObjId, k, SHARE_NUM )
{
assert( ObjId < Vec_IntSize(p->vObj2Lit) );
if ( ObjId >= p->nStartCols )
break;
assert( ObjId < p->nStartCols );
iLit = Vec_IntEntry( vInput, 0 );
pNew = (Abc_Obj_t *)Vec_PtrEntry( vRepl, ObjId );
pNew = Abc_AigXor( (Abc_Aig_t *)p->pNtk->pManFunc, pNew, Abc_ObjFromLit(p->pNtk, iLit) );
Vec_PtrWriteEntry( vRepl, ObjId, pNew );
p->nCountXors++;
}
}
if ( p->fVerbose )
printf( "Total XORs collected = %d. Total XORs constructed = %d.\n", p->nFoundXors, p->nCountXors );
// create map of originals
vMap2Repl = Vec_IntStartFull( Abc_NtkObjNumMax(p->pNtk) );
Vec_PtrForEachEntry( Abc_Obj_t *, vOrig, pObj, i )
Vec_IntWriteEntry( vMap2Repl, Abc_ObjId(pObj), Abc_ObjToLit((Abc_Obj_t *)Vec_PtrEntry(vRepl, i)) );
Vec_PtrFree( vOrig );
Vec_PtrFree( vRepl );
// update fanin pointers
Abc_NtkForEachObj( p->pNtk, pObj, i )
{
if ( Abc_ObjIsCo(pObj) || Abc_ObjIsNode(pObj) )
{
iLit = Vec_IntEntry( vMap2Repl, Abc_ObjFaninId0(pObj) );
if ( iLit >= 0 )
{
pObj->fCompl0 ^= Abc_LitIsCompl(iLit);
Vec_IntWriteEntry( &pObj->vFanins, 0, Abc_Lit2Var(iLit) );
}
}
if ( Abc_ObjIsNode(pObj) )
{
iLit = Vec_IntEntry( vMap2Repl, Abc_ObjFaninId1(pObj) );
if ( iLit >= 0 )
{
pObj->fCompl1 ^= Abc_LitIsCompl(iLit);
Vec_IntWriteEntry( &pObj->vFanins, 1, Abc_Lit2Var(iLit) );
}
}
}
Vec_IntFree( vMap2Repl );
// pNtk = Abc_NtkRestrash( p->pNtk, 1 );
pNtk = Abc_NtkBalanceExor( p->pNtk, 1, 0 );
return pNtk;
}
/**Function*************************************************************
Synopsis [Creates multi-input XOR representation for the nodes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkTraverseSupers_rec( Abc_ShaMan_t * p, Abc_Obj_t * pObj, Vec_Ptr_t * vInputs )
{
if ( Abc_NodeIsTravIdCurrent( pObj ) )
return;
Abc_NodeSetTravIdCurrent( pObj );
if ( Abc_ObjIsCi(pObj) )
return;
assert( Abc_ObjIsNode(pObj) );
if ( Abc_NodeIsExorType(pObj) )
{
Vec_Wrd_t * vSuper;
int k, fCompl;
word Num;
vSuper = Abc_NtkShareSuperXor( pObj, &fCompl, &p->nFoundXors );
if ( Vec_WrdSize(vSuper) >= p->nMultiSize )
{
Vec_WrdForEachEntry( vSuper, Num, k )
{
Vec_Int_t * vInput = (Vec_Int_t *)Vec_PtrEntry( vInputs, (int)Num );
if ( vInput == NULL )
{
vInput = Vec_IntAlloc( 10 );
Vec_IntPush( vInput, Abc_Var2Lit((int)Num, 0) );
Vec_IntPush( vInput, Abc_ObjLevel(Abc_NtkObj(p->pNtk, (int)Num)) );
assert( SHARE_NUM == Vec_IntSize(vInput) );
Vec_PtrWriteEntry( vInputs, (int)Num, vInput );
}
Vec_IntPush( vInput, Vec_IntSize(p->vObj2Lit) );
}
Vec_IntPush( p->vObj2Lit, Abc_Var2Lit(Abc_ObjId(pObj), fCompl) );
}
// call recursively
Vec_WrdForEachEntry( vSuper, Num, k )
Abc_NtkTraverseSupers_rec( p, Abc_NtkObj(p->pNtk, (int)Num), vInputs );
Vec_WrdFree( vSuper );
}
else
{
Abc_NtkTraverseSupers_rec( p, Abc_ObjFanin0(pObj), vInputs );
Abc_NtkTraverseSupers_rec( p, Abc_ObjFanin1(pObj), vInputs );
}
}
void Abc_NtkTraverseSupers( Abc_ShaMan_t * p )
{
Vec_Ptr_t * vInputs;
Vec_Int_t * vInput;
Abc_Obj_t * pObj;
int i, nOnesMax;
// create mapping of nodes into their column vectors
vInputs = Vec_PtrStart( Abc_NtkObjNumMax(p->pNtk) );
Abc_NtkIncrementTravId( p->pNtk );
Abc_NtkForEachCo( p->pNtk, pObj, i )
Abc_NtkTraverseSupers_rec( p, Abc_ObjFanin0(pObj), vInputs );
p->nStartCols = Vec_IntSize(p->vObj2Lit);
// find the largest number of 1s
nOnesMax = 0;
Vec_PtrForEachEntry( Vec_Int_t *, vInputs, vInput, i )
if ( vInput )
nOnesMax = Abc_MaxInt( nOnesMax, Vec_IntSize(vInput)-SHARE_NUM );
// create buckets
assert( p->vBuckets == NULL );
p->vBuckets = Vec_PtrAlloc( nOnesMax + 1 );
for ( i = 0; i <= nOnesMax; i++ )
Vec_PtrPush( p->vBuckets, Vec_PtrAlloc(10) );
// load vectors into buckets
Vec_PtrForEachEntry( Vec_Int_t *, vInputs, vInput, i )
if ( vInput )
Vec_PtrPush( (Vec_Ptr_t *)Vec_PtrEntry(p->vBuckets, Vec_IntSize(vInput)-SHARE_NUM), vInput );
Vec_PtrFree( vInputs );
}
/**Function*************************************************************
Synopsis [Extracts one multi-output XOR.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkShareXor( Abc_Ntk_t * pNtk, int nMultiSize, int fAnd, int fVerbose )
{
Abc_Ntk_t * pNtkNew;
Abc_ShaMan_t * p;
assert( Abc_NtkIsStrash(pNtk) );
p = Abc_ShaManStart( pNtk );
p->nMultiSize = nMultiSize;
p->fVerbose = fVerbose;
Abc_NtkTraverseSupers( p );
if ( p->nStartCols < 2 )
{
Abc_ShaManStop( p );
return Abc_NtkDup( pNtk );
}
if ( fVerbose )
Abc_NtkSharePrint( p );
Abc_NtkShareOptimize( p );
if ( fVerbose )
Abc_NtkSharePrint( p );
pNtkNew = Abc_NtkUpdateNetwork( p );
Abc_ShaManStop( p );
return pNtkNew;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////

448
src/base/abci/abcShare.c
View File

@ -1,448 +0,0 @@
/**CFile****************************************************************
FileName [abcShare.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Network and node package.]
Synopsis [Shared logic extraction.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: abcShare.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "src/base/abc/abc.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
#define SHARE_NUM 2
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
static inline word Abc_NtkSharePack( int Lev, int Id ) { return (((word)Lev) << 32) | Id; }
static inline int Abc_NtkShareUnpackLev( word Num ) { return (Num >> 32); }
static inline int Abc_NtkShareUnpackId( word Num ) { return Num & 0xFFFF; }
/**Function*************************************************************
Synopsis [Collects one multi-input XOR.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Wrd_t * Abc_NtkShareSuperXor( Abc_Obj_t * pObjInit, int * pfCompl )
{
int fCompl = Abc_ObjIsComplement(pObjInit);
Abc_Obj_t * pObj = Abc_ObjRegular(pObjInit);
Abc_Ntk_t * pNtk = Abc_ObjNtk(pObj);
Abc_Obj_t * pObjC, * pObj0, * pObj1, * pRoot;
Vec_Wrd_t * vSuper;
word Num, NumNext;
int i, k;
assert( Abc_NodeIsExorType(pObj) );
// start iteration
vSuper = Vec_WrdAlloc( 10 );
Vec_WrdPush( vSuper, Abc_NtkSharePack(Abc_ObjLevel(pObj), Abc_ObjId(pObj)) );
while ( Vec_WrdSize(vSuper) > 0 )
{
// make sure there are no duplicates
Num = Vec_WrdEntry( vSuper, 0 );
Vec_WrdForEachEntryStart( vSuper, NumNext, i, 1 )
{
assert( Num != NumNext );
Num = NumNext;
}
// extract XOR gate decomposable on the topmost level
Vec_WrdForEachEntryReverse( vSuper, Num, i )
{
pRoot = Abc_NtkObj( pNtk, Abc_NtkShareUnpackId(Num) );
if ( Abc_NodeIsExorType(pRoot) )
{
Vec_WrdRemove( vSuper, Num );
break;
}
}
if ( i == -1 )
break;
// extract
pObjC = Abc_NodeRecognizeMux( pRoot, &pObj1, &pObj0 );
assert( pObj1 == Abc_ObjNot(pObj0) );
fCompl ^= Abc_ObjIsComplement(pObjC); pObjC = Abc_ObjRegular(pObjC);
fCompl ^= Abc_ObjIsComplement(pObj0); pObj0 = Abc_ObjRegular(pObj0);
Vec_WrdPushOrder( vSuper, Abc_NtkSharePack(Abc_ObjLevel(pObjC), Abc_ObjId(pObjC)) );
Vec_WrdPushOrder( vSuper, Abc_NtkSharePack(Abc_ObjLevel(pObj0), Abc_ObjId(pObj0)) );
// remove duplicates
k = 0;
Vec_WrdForEachEntry( vSuper, Num, i )
{
if ( i + 1 == Vec_WrdSize(vSuper) )
{
Vec_WrdWriteEntry( vSuper, k++, Num );
break;
}
NumNext = Vec_WrdEntry( vSuper, i+1 );
assert( Num <= NumNext );
if ( Num == NumNext )
i++;
else
Vec_WrdWriteEntry( vSuper, k++, Num );
}
Vec_WrdShrink( vSuper, k );
}
*pfCompl = fCompl;
Vec_WrdForEachEntry( vSuper, Num, i )
Vec_WrdWriteEntry( vSuper, i, Abc_NtkShareUnpackId(Num) );
return vSuper;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Int_t * Abc_NtkShareFindBest_( Vec_Ptr_t * vBuckets )
{
Vec_Ptr_t * vBucket;
int i;
Vec_PtrForEachEntryReverse( Vec_Ptr_t *, vBuckets, vBucket, i )
{
if ( Vec_PtrSize(vBucket) == 0 )
continue;
return (Vec_Int_t *)Vec_PtrPop( vBucket );
}
return NULL;
}
Vec_Int_t * Abc_NtkShareFindBestMatch_( Vec_Ptr_t * vBuckets, Vec_Int_t * vInput2 )
{
Vec_Ptr_t * vBucket, * vBucketBest = NULL;
Vec_Int_t * vInput, * vInputBest = NULL;
int i, k, Cost, CostBest = 0;
Vec_PtrForEachEntry( Vec_Ptr_t *, vBuckets, vBucket, i )
Vec_PtrForEachEntry( Vec_Int_t *, vBucket, vInput, k )
{
vInput->pArray += SHARE_NUM;
vInput2->pArray += SHARE_NUM;
vInput->nSize -= SHARE_NUM;
vInput2->nSize -= SHARE_NUM;
Cost = Vec_IntTwoCountCommon(vInput, vInput2);
vInput->pArray -= SHARE_NUM;
vInput2->pArray -= SHARE_NUM;
vInput->nSize += SHARE_NUM;
vInput2->nSize += SHARE_NUM;
if ( Cost < 2 )
continue;
if ( CostBest < Cost )
{
CostBest = Cost;
vInputBest = vInput;
vBucketBest = vBucket;
}
}
if ( vInputBest )
Vec_PtrRemove( vBucketBest, (Vec_Int_t *)vInputBest );
printf( "%d ", CostBest );
return vInputBest;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkShareFindBestMatch( Vec_Ptr_t * vBuckets, Vec_Int_t ** pvInput, Vec_Int_t ** pvInput2 )
{
int nPoolSize = 40;
Vec_Ptr_t * vPool = Vec_PtrAlloc( nPoolSize );
Vec_Ptr_t * vBucket;
Vec_Int_t * vInput, * vInput2, * vInputBest = NULL, * vInputBest2 = NULL;
int i, k, Cost, CostBest = 0, Delay, DelayBest = 0;
Vec_PtrForEachEntryReverse( Vec_Ptr_t *, vBuckets, vBucket, i )
Vec_PtrForEachEntry( Vec_Int_t *, vBucket, vInput, k )
{
Vec_PtrPush( vPool, vInput );
if ( Vec_PtrSize(vPool) == nPoolSize )
goto outside;
}
outside:
Vec_PtrForEachEntryReverse( Vec_Int_t *, vPool, vInput, i )
Vec_PtrForEachEntryReverse( Vec_Int_t *, vPool, vInput2, k )
{
if ( i == k )
continue;
vInput->pArray += SHARE_NUM;
vInput2->pArray += SHARE_NUM;
vInput->nSize -= SHARE_NUM;
vInput2->nSize -= SHARE_NUM;
Cost = Vec_IntTwoCountCommon(vInput, vInput2);
vInput->pArray -= SHARE_NUM;
vInput2->pArray -= SHARE_NUM;
vInput->nSize += SHARE_NUM;
vInput2->nSize += SHARE_NUM;
if ( Cost < 2 )
continue;
Delay = Abc_MaxInt( Vec_IntEntry(vInput, 1), Vec_IntEntry(vInput2, 1) );
if ( CostBest < Cost || (CostBest == Cost && (DelayBest > Delay)) )
{
CostBest = Cost;
DelayBest = Delay;
vInputBest = vInput;
vInputBest2 = vInput2;
}
}
Vec_PtrFree( vPool );
*pvInput = vInputBest;
*pvInput2 = vInputBest2;
if ( vInputBest == NULL )
return;
Vec_PtrRemove( (Vec_Ptr_t *)Vec_PtrEntry(vBuckets, Vec_IntSize(vInputBest)-SHARE_NUM), (Vec_Int_t *)vInputBest );
Vec_PtrRemove( (Vec_Ptr_t *)Vec_PtrEntry(vBuckets, Vec_IntSize(vInputBest2)-SHARE_NUM), (Vec_Int_t *)vInputBest2 );
}
void Abc_NtkSharePrint( Abc_Ntk_t * pNtk, Vec_Ptr_t * vBuckets, int Counter )
{
Vec_Ptr_t * vBucket;
Vec_Int_t * vInput;
int i, k, j, ObjId;
char * pBuffer = ABC_ALLOC( char, Counter + 1 );
int * pCounters = ABC_CALLOC( int, Counter + 1 );
int nTotal = 0;
Vec_PtrForEachEntry( Vec_Ptr_t *, vBuckets, vBucket, i )
Vec_PtrForEachEntry( Vec_Int_t *, vBucket, vInput, j )
{
for ( k = 0; k < Counter; k++ )
pBuffer[k] = '0';
pBuffer[k] = 0;
Vec_IntForEachEntryStart( vInput, ObjId, k, SHARE_NUM )
{
assert( ObjId < Counter );
pBuffer[ObjId] = '1';
pCounters[ObjId]++;
}
printf( "%4d%3d: %s\n", Vec_IntEntry(vInput, 0), Vec_IntEntry(vInput, 1), pBuffer );
}
ABC_FREE( pBuffer );
for ( i = 0; i < Counter; i++ )
if ( pCounters[i] > 0 )
printf( "%d=%d ", i, pCounters[i] );
nTotal = 0;
for ( i = 0; i < Abc_NtkCoNum(pNtk); i++ )
nTotal += pCounters[i] - 1;
printf( "Total = %d.\n", nTotal );
printf( "Xors = %d.\n", Counter - Abc_NtkCoNum(pNtk) + nTotal );
ABC_FREE( pCounters );
}
void Abc_NtkShareOptimize( Abc_Ntk_t * pNtk, Vec_Ptr_t * vBuckets, int * pCounter )
{
Abc_Obj_t * pObj, * pObj0, * pObj1;
Vec_Int_t * vInput, * vInput2;
Vec_Int_t * vNew, * vOld1, * vOld2;
int i, iLit;
for ( i = 0; ; i++ )
{
Abc_NtkShareFindBestMatch( vBuckets, &vInput, &vInput2 );
if ( vInput == NULL )
break;
// create new node
pObj0 = Abc_ObjFromLit( pNtk, Vec_IntEntry(vInput, 0) );
pObj1 = Abc_ObjFromLit( pNtk, Vec_IntEntry(vInput2, 0) );
pObj = Abc_AigXor( (Abc_Aig_t *)pNtk->pManFunc, pObj0, pObj1 );
iLit = Abc_ObjToLit( pObj );
// save new node
vOld1 = Vec_IntAlloc( 16 ); Vec_IntPush( vOld1, Vec_IntEntry(vInput, 0) ); Vec_IntPush( vOld1, Vec_IntEntry(vInput, 1) );
vOld2 = Vec_IntAlloc( 16 ); Vec_IntPush( vOld2, Vec_IntEntry(vInput2, 0) ); Vec_IntPush( vOld2, Vec_IntEntry(vInput2, 1) );
vNew = Vec_IntAlloc( 16 ); Vec_IntPush( vNew, iLit ); Vec_IntPush( vNew, Abc_ObjLevel(Abc_ObjRegular(pObj)) );
// compute new arrays
vInput->pArray += SHARE_NUM;
vInput2->pArray += SHARE_NUM;
vInput->nSize -= SHARE_NUM;
vInput2->nSize -= SHARE_NUM;
Vec_IntTwoSplit( vInput, vInput2, vNew, vOld1, vOld2 );
vInput->pArray -= SHARE_NUM;
vInput2->pArray -= SHARE_NUM;
vInput->nSize += SHARE_NUM;
vInput2->nSize += SHARE_NUM;
// add to the old ones
Vec_IntPush( vOld1, *pCounter );
Vec_IntPush( vOld2, *pCounter );
(*pCounter)++;
Vec_PtrPush( (Vec_Ptr_t *)Vec_PtrEntry(vBuckets, Vec_IntSize(vOld1)-SHARE_NUM), vOld1 );
Vec_PtrPush( (Vec_Ptr_t *)Vec_PtrEntry(vBuckets, Vec_IntSize(vOld2)-SHARE_NUM), vOld2 );
Vec_PtrPush( (Vec_Ptr_t *)Vec_PtrEntry(vBuckets, Vec_IntSize(vNew)-SHARE_NUM), vNew );
Vec_IntFree( vInput );
Vec_IntFree( vInput2 );
}
printf( "\n" );
}
/**Function*************************************************************
Synopsis [Extracts one multi-output XOR.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkShareXor( Abc_Ntk_t * pNtk )
{
Vec_Ptr_t * vBuckets, * vBucket;
Vec_Ptr_t * vInputs;
Vec_Int_t * vInput;
Vec_Wrd_t * vSuper;
Abc_Obj_t * pObj;
word Num;
int i, k, ObjId, fCompl, nOnesMax, Counter;
assert( Abc_NtkIsStrash(pNtk) );
vInputs = Vec_PtrStart( Abc_NtkObjNumMax(pNtk) );
Abc_NtkForEachCo( pNtk, pObj, i )
{
if ( !Abc_NodeIsExorType(Abc_ObjFanin0(pObj)) )
continue;
vSuper = Abc_NtkShareSuperXor( Abc_ObjChild0(pObj), &fCompl );
//printf( "%d ", Vec_WrdSize(vSuper) );
pObj->fMarkA = fCompl;
Vec_WrdForEachEntry( vSuper, Num, k )
{
ObjId = Abc_NtkShareUnpackId(Num);
vInput = (Vec_Int_t *)Vec_PtrEntry( vInputs, ObjId );
if ( vInput == NULL )
{
vInput = Vec_IntAlloc( 10 );
Vec_IntPush( vInput, Abc_Var2Lit(ObjId, 0) );
Vec_IntPush( vInput, Abc_ObjLevel(Abc_NtkObj(pNtk, ObjId)) );
assert( SHARE_NUM == Vec_IntSize(vInput) );
Vec_PtrWriteEntry( vInputs, ObjId, vInput );
}
// Vec_IntPush( vInput, Abc_ObjFaninId0(pObj) );
// Vec_IntPush( vInput, Abc_ObjId(pObj) );
Vec_IntPush( vInput, i );
}
Vec_WrdFree( vSuper );
}
//printf( "\n" );
// find the largest number of 1s
nOnesMax = 0;
Vec_PtrForEachEntry( Vec_Int_t *, vInputs, vInput, i )
if ( vInput )
nOnesMax = Abc_MaxInt( nOnesMax, Vec_IntSize(vInput)-SHARE_NUM );
vBuckets = Vec_PtrAlloc( nOnesMax + 1 );
for ( i = 0; i <= nOnesMax; i++ )
Vec_PtrPush( vBuckets, Vec_PtrAlloc(10) );
Vec_PtrForEachEntry( Vec_Int_t *, vInputs, vInput, i )
if ( vInput )
Vec_PtrPush( (Vec_Ptr_t *)Vec_PtrEntry(vBuckets, Vec_IntSize(vInput)-SHARE_NUM), vInput );
// find the best match
Counter = Abc_NtkCoNum(pNtk);
Abc_NtkShareOptimize( pNtk, vBuckets, &Counter );
Abc_NtkSharePrint( pNtk, vBuckets, Counter );
// clean up
Vec_PtrForEachEntry( Vec_Ptr_t *, vBuckets, vBucket, i )
printf( "%d ", Vec_PtrSize(vBucket) );
printf( "\n" );
Vec_PtrForEachEntry( Vec_Ptr_t *, vBuckets, vBucket, i )
Vec_VecFree( (Vec_Vec_t *)vBucket );
Vec_PtrFree( vBuckets );
/*
// print
Vec_PtrForEachEntry( Vec_Int_t *, vInputs, vInput, i )
{
if ( vInput == NULL )
continue;
pObj = Abc_NtkObj(pNtk, i);
assert( Abc_ObjIsCi(pObj) );
Vec_IntForEachEntryStart( vInput, ObjId, k, SHARE_NUM )
Abc_NtkObj( pNtk, ObjId )->fMarkA = 1;
Abc_NtkForEachCo( pNtk, pObj, k )
printf( "%d", pObj->fMarkA );
printf( "\n" );
Vec_IntForEachEntryStart( vInput, ObjId, k, SHARE_NUM )
Abc_NtkObj( pNtk, ObjId )->fMarkA = 0;
}
Vec_PtrForEachEntry( Vec_Int_t *, vInputs, vInput, i )
Vec_IntFreeP( &vInput );
*/
Vec_PtrFree( vInputs );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END

9
src/base/abci/abcStrash.c
View File

@ -49,6 +49,7 @@ static void Abc_NtkStrashPerform( Abc_Ntk_t * pNtk, Abc_Ntk_t * pNtkNew, int fAl
Abc_Ntk_t * Abc_NtkRestrash( Abc_Ntk_t * pNtk, int fCleanup )
{
// extern int timeRetime;
Vec_Ptr_t * vNodes;
Abc_Ntk_t * pNtkAig;
Abc_Obj_t * pObj;
int i, nNodes;//, RetValue;
@ -60,8 +61,10 @@ Abc_Ntk_t * Abc_NtkRestrash( Abc_Ntk_t * pNtk, int fCleanup )
// start the new network (constants and CIs of the old network will point to the their counterparts in the new network)
pNtkAig = Abc_NtkStartFrom( pNtk, ABC_NTK_STRASH, ABC_FUNC_AIG );
// restrash the nodes (assuming a topological order of the old network)
Abc_NtkForEachNode( pNtk, pObj, i )
vNodes = Abc_NtkDfs( pNtk, 0 );
Vec_PtrForEachEntry( Abc_Obj_t *, vNodes, pObj, i )
pObj->pCopy = Abc_AigAnd( (Abc_Aig_t *)pNtkAig->pManFunc, Abc_ObjChild0Copy(pObj), Abc_ObjChild1Copy(pObj) );
Vec_PtrFree( vNodes );
// finalize the network
Abc_NtkFinalize( pNtk, pNtkAig );
// print warning about self-feed latches
@ -69,7 +72,9 @@ Abc_Ntk_t * Abc_NtkRestrash( Abc_Ntk_t * pNtk, int fCleanup )
// printf( "Warning: The network has %d self-feeding latches.\n", Abc_NtkCountSelfFeedLatches(pNtkAig) );
// perform cleanup if requested
if ( fCleanup && (nNodes = Abc_AigCleanup((Abc_Aig_t *)pNtkAig->pManFunc)) )
printf( "Abc_NtkRestrash(): AIG cleanup removed %d nodes (this is a bug).\n", nNodes );
{
// printf( "Abc_NtkRestrash(): AIG cleanup removed %d nodes (this is a bug).\n", nNodes );
}
// duplicate EXDC
if ( pNtk->pExdc )
pNtkAig->pExdc = Abc_NtkDup( pNtk->pExdc );