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|
/**CFile****************************************************************
FileName [esop.h]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Cover manipulation package.]
Synopsis [Internal declarations.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: esop.h,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#ifndef __ESOP_H__
#define __ESOP_H__
#ifdef __cplusplus
extern "C" {
#endif
#include "stdio.h"
#include "vec.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
typedef struct Esop_Man_t_ Esop_Man_t;
typedef struct Esop_Cube_t_ Esop_Cube_t;
typedef struct Esop_MmFixed_t_ Esop_MmFixed_t;
struct Esop_Man_t_
{
int nVars; // the number of vars
int nWords; // the number of words
Esop_MmFixed_t * pMemMan1; // memory manager for cubes
Esop_MmFixed_t * pMemMan2; // memory manager for cubes
Esop_MmFixed_t * pMemMan4; // memory manager for cubes
Esop_MmFixed_t * pMemMan8; // memory manager for cubes
// temporary cubes
Esop_Cube_t * pOne0; // tautology cube
Esop_Cube_t * pOne1; // tautology cube
Esop_Cube_t * pTriv0; // trivial cube
Esop_Cube_t * pTriv1; // trivial cube
Esop_Cube_t * pTemp; // cube for computing the distance
Esop_Cube_t * pBubble; // cube used as a separator
// temporary storage for the new cover
int nCubes; // the number of cubes
Esop_Cube_t ** ppStore; // storage for cubes by number of literals
};
struct Esop_Cube_t_
{
Esop_Cube_t * pNext; // the pointer to the next cube in the cover
unsigned nVars : 10; // the number of variables
unsigned nWords : 12; // the number of machine words
unsigned nLits : 10; // the number of literals in the cube
unsigned uData[1]; // the bit-data for the cube
};
#define ALLOC(type, num) ((type *) malloc(sizeof(type) * (num)))
#define FREE(obj) ((obj) ? (free((char *) (obj)), (obj) = 0) : 0)
#define REALLOC(type, obj, num) \
((obj) ? ((type *) realloc((char *)(obj), sizeof(type) * (num))) : \
((type *) malloc(sizeof(type) * (num))))
// iterators through the entries in the linked lists of cubes
#define Esop_CoverForEachCube( pCover, pCube ) \
for ( pCube = pCover; \
pCube; \
pCube = pCube->pNext )
#define Esop_CoverForEachCubeSafe( pCover, pCube, pCube2 ) \
for ( pCube = pCover, \
pCube2 = pCube? pCube->pNext: NULL; \
pCube; \
pCube = pCube2, \
pCube2 = pCube? pCube->pNext: NULL )
#define Esop_CoverForEachCubePrev( pCover, pCube, ppPrev ) \
for ( pCube = pCover, \
ppPrev = &(pCover); \
pCube; \
ppPrev = &pCube->pNext, \
pCube = pCube->pNext )
// macros to get hold of bits and values in the cubes
static inline int Esop_CubeHasBit( Esop_Cube_t * p, int i ) { return (p->uData[i >> 5] & (1<<(i & 31))) > 0; }
static inline void Esop_CubeSetBit( Esop_Cube_t * p, int i ) { p->uData[i >> 5] |= (1<<(i & 31)); }
static inline void Esop_CubeXorBit( Esop_Cube_t * p, int i ) { p->uData[i >> 5] ^= (1<<(i & 31)); }
static inline int Esop_CubeGetVar( Esop_Cube_t * p, int Var ) { return 3 & (p->uData[(Var<<1)>>5] >> ((Var<<1) & 31)); }
static inline void Esop_CubeXorVar( Esop_Cube_t * p, int Var, int Value ) { p->uData[(Var<<1)>>5] ^= (Value<<((Var<<1) & 31)); }
static inline int Esop_BitWordNum( int nBits ) { return (nBits>>5) + ((nBits&31) > 0); }
/*=== esopMem.c ===========================================================*/
extern Esop_MmFixed_t * Esop_MmFixedStart( int nEntrySize );
extern void Esop_MmFixedStop( Esop_MmFixed_t * p, int fVerbose );
extern char * Esop_MmFixedEntryFetch( Esop_MmFixed_t * p );
extern void Esop_MmFixedEntryRecycle( Esop_MmFixed_t * p, char * pEntry );
extern void Esop_MmFixedRestart( Esop_MmFixed_t * p );
extern int Esop_MmFixedReadMemUsage( Esop_MmFixed_t * p );
/*=== esopMin.c ===========================================================*/
extern void Esop_EsopMinimize( Esop_Man_t * p );
extern void Esop_EsopAddCube( Esop_Man_t * p, Esop_Cube_t * pCube );
/*=== esopMan.c ===========================================================*/
extern Esop_Man_t * Esop_ManAlloc( int nVars );
extern void Esop_ManClean( Esop_Man_t * p, int nSupp );
extern void Esop_ManFree( Esop_Man_t * p );
/*=== esopUtil.c ===========================================================*/
extern void Esop_CubeWrite( FILE * pFile, Esop_Cube_t * pCube );
extern void Esop_CoverWrite( FILE * pFile, Esop_Cube_t * pCover );
extern void Esop_CoverWriteStore( FILE * pFile, Esop_Man_t * p );
extern void Esop_CoverWriteFile( Esop_Cube_t * pCover, char * pName, int fEsop );
extern void Esop_CoverCheck( Esop_Man_t * p );
extern int Esop_CubeCheck( Esop_Cube_t * pCube );
extern Esop_Cube_t * Esop_CoverCollect( Esop_Man_t * p, int nSuppSize );
extern void Esop_CoverExpand( Esop_Man_t * p, Esop_Cube_t * pCover );
extern int Esop_CoverSuppVarNum( Esop_Man_t * p, Esop_Cube_t * pCover );
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Creates the cube.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline Esop_Cube_t * Esop_CubeAlloc( Esop_Man_t * p )
{
Esop_Cube_t * pCube;
if ( p->nWords <= 1 )
pCube = (Esop_Cube_t *)Esop_MmFixedEntryFetch( p->pMemMan1 );
else if ( p->nWords <= 2 )
pCube = (Esop_Cube_t *)Esop_MmFixedEntryFetch( p->pMemMan2 );
else if ( p->nWords <= 4 )
pCube = (Esop_Cube_t *)Esop_MmFixedEntryFetch( p->pMemMan4 );
else if ( p->nWords <= 8 )
pCube = (Esop_Cube_t *)Esop_MmFixedEntryFetch( p->pMemMan8 );
pCube->pNext = NULL;
pCube->nVars = p->nVars;
pCube->nWords = p->nWords;
pCube->nLits = 0;
memset( pCube->uData, 0xff, sizeof(unsigned) * p->nWords );
return pCube;
}
/**Function*************************************************************
Synopsis [Creates the cube representing elementary var.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline Esop_Cube_t * Esop_CubeAllocVar( Esop_Man_t * p, int iVar, int fCompl )
{
Esop_Cube_t * pCube;
pCube = Esop_CubeAlloc( p );
Esop_CubeXorBit( pCube, iVar*2+fCompl );
pCube->nLits = 1;
return pCube;
}
/**Function*************************************************************
Synopsis [Creates the cube.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline Esop_Cube_t * Esop_CubeDup( Esop_Man_t * p, Esop_Cube_t * pCopy )
{
Esop_Cube_t * pCube;
pCube = Esop_CubeAlloc( p );
memcpy( pCube->uData, pCopy->uData, sizeof(unsigned) * p->nWords );
pCube->nLits = pCopy->nLits;
return pCube;
}
/**Function*************************************************************
Synopsis [Recycles the cube.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Esop_CubeRecycle( Esop_Man_t * p, Esop_Cube_t * pCube )
{
if ( pCube->nWords <= 1 )
Esop_MmFixedEntryRecycle( p->pMemMan1, (char *)pCube );
else if ( pCube->nWords <= 2 )
Esop_MmFixedEntryRecycle( p->pMemMan2, (char *)pCube );
else if ( pCube->nWords <= 4 )
Esop_MmFixedEntryRecycle( p->pMemMan4, (char *)pCube );
else if ( pCube->nWords <= 8 )
Esop_MmFixedEntryRecycle( p->pMemMan8, (char *)pCube );
}
/**Function*************************************************************
Synopsis [Recycles the cube cover.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Esop_CoverRecycle( Esop_Man_t * p, Esop_Cube_t * pCover )
{
Esop_Cube_t * pCube, * pCube2;
if ( pCover == NULL )
return;
if ( pCover->nWords <= 1 )
Esop_CoverForEachCubeSafe( pCover, pCube, pCube2 )
Esop_MmFixedEntryRecycle( p->pMemMan1, (char *)pCube );
else if ( pCover->nWords <= 2 )
Esop_CoverForEachCubeSafe( pCover, pCube, pCube2 )
Esop_MmFixedEntryRecycle( p->pMemMan2, (char *)pCube );
else if ( pCover->nWords <= 4 )
Esop_CoverForEachCubeSafe( pCover, pCube, pCube2 )
Esop_MmFixedEntryRecycle( p->pMemMan4, (char *)pCube );
else if ( pCover->nWords <= 8 )
Esop_CoverForEachCubeSafe( pCover, pCube, pCube2 )
Esop_MmFixedEntryRecycle( p->pMemMan8, (char *)pCube );
}
/**Function*************************************************************
Synopsis [Recycles the cube cover.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline Esop_Cube_t * Esop_CoverDup( Esop_Man_t * p, Esop_Cube_t * pCover )
{
Esop_Cube_t * pCube, * pCubeNew;
Esop_Cube_t * pCoverNew = NULL, ** ppTail = &pCoverNew;
Esop_CoverForEachCube( pCover, pCube )
{
pCubeNew = Esop_CubeDup( p, pCube );
*ppTail = pCubeNew;
ppTail = &pCubeNew->pNext;
}
*ppTail = NULL;
return pCoverNew;
}
/**Function*************************************************************
Synopsis [Counts the number of cubes in the cover.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int Esop_CubeCountLits( Esop_Cube_t * pCube )
{
unsigned uData;
int Count = 0, i, w;
for ( w = 0; w < (int)pCube->nWords; w++ )
{
uData = pCube->uData[w] ^ (pCube->uData[w] >> 1);
for ( i = 0; i < 32; i += 2 )
if ( uData & (1 << i) )
Count++;
}
return Count;
}
/**Function*************************************************************
Synopsis [Counts the number of cubes in the cover.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Esop_CubeGetLits( Esop_Cube_t * pCube, Vec_Int_t * vLits )
{
unsigned uData;
int i, w;
Vec_IntClear( vLits );
for ( w = 0; w < (int)pCube->nWords; w++ )
{
uData = pCube->uData[w] ^ (pCube->uData[w] >> 1);
for ( i = 0; i < 32; i += 2 )
if ( uData & (1 << i) )
Vec_IntPush( vLits, w*16 + i/2 );
}
}
/**Function*************************************************************
Synopsis [Counts the number of cubes in the cover.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int Esop_CoverCountCubes( Esop_Cube_t * pCover )
{
Esop_Cube_t * pCube;
int Count = 0;
Esop_CoverForEachCube( pCover, pCube )
Count++;
return Count;
}
/**Function*************************************************************
Synopsis [Checks if two cubes are disjoint.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int Esop_CubesDisjoint( Esop_Cube_t * pCube0, Esop_Cube_t * pCube1 )
{
unsigned uData;
int i;
assert( pCube0->nVars == pCube1->nVars );
for ( i = 0; i < (int)pCube0->nWords; i++ )
{
uData = pCube0->uData[i] & pCube1->uData[i];
uData = (uData | (uData >> 1)) & 0x55555555;
if ( uData != 0x55555555 )
return 1;
}
return 0;
}
/**Function*************************************************************
Synopsis [Collects the disjoint variables of the two cubes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Esop_CoverGetDisjVars( Esop_Cube_t * pThis, Esop_Cube_t * pCube, Vec_Int_t * vVars )
{
unsigned uData;
int i, w;
Vec_IntClear( vVars );
for ( w = 0; w < (int)pCube->nWords; w++ )
{
uData = pThis->uData[w] & (pThis->uData[w] >> 1) & 0x55555555;
uData &= (pCube->uData[w] ^ (pCube->uData[w] >> 1));
if ( uData == 0 )
continue;
for ( i = 0; i < 32; i += 2 )
if ( uData & (1 << i) )
Vec_IntPush( vVars, w*16 + i/2 );
}
}
/**Function*************************************************************
Synopsis [Checks if two cubes are disjoint.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int Esop_CubesDistOne( Esop_Cube_t * pCube0, Esop_Cube_t * pCube1, Esop_Cube_t * pTemp )
{
unsigned uData;
int i, fFound = 0;
for ( i = 0; i < (int)pCube0->nWords; i++ )
{
uData = pCube0->uData[i] ^ pCube1->uData[i];
if ( uData == 0 )
{
if ( pTemp ) pTemp->uData[i] = 0;
continue;
}
if ( fFound )
return 0;
uData = (uData | (uData >> 1)) & 0x55555555;
if ( (uData & (uData-1)) > 0 ) // more than one 1
return 0;
if ( pTemp ) pTemp->uData[i] = uData | (uData << 1);
fFound = 1;
}
if ( fFound == 0 )
{
printf( "\n" );
Esop_CubeWrite( stdout, pCube0 );
Esop_CubeWrite( stdout, pCube1 );
printf( "Error: Esop_CubesDistOne() looks at two equal cubes!\n" );
}
return 1;
}
/**Function*************************************************************
Synopsis [Checks if two cubes are disjoint.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int Esop_CubesDistTwo( Esop_Cube_t * pCube0, Esop_Cube_t * pCube1, int * pVar0, int * pVar1 )
{
unsigned uData;//, uData2;
int i, k, Var0 = -1, Var1 = -1;
for ( i = 0; i < (int)pCube0->nWords; i++ )
{
uData = pCube0->uData[i] ^ pCube1->uData[i];
if ( uData == 0 )
continue;
if ( Var0 >= 0 && Var1 >= 0 ) // more than two 1s
return 0;
uData = (uData | (uData >> 1)) & 0x55555555;
if ( (Var0 >= 0 || Var1 >= 0) && (uData & (uData-1)) > 0 )
return 0;
for ( k = 0; k < 32; k += 2 )
if ( uData & (1 << k) )
{
if ( Var0 == -1 )
Var0 = 16 * i + k/2;
else if ( Var1 == -1 )
Var1 = 16 * i + k/2;
else
return 0;
}
/*
if ( Var0 >= 0 )
{
uData &= 0xFFFF;
uData2 = (uData >> 16);
if ( uData && uData2 )
return 0;
if ( uData )
{
}
uData }= uData2;
uData &= 0x
}
*/
}
if ( Var0 >= 0 && Var1 >= 0 )
{
*pVar0 = Var0;
*pVar1 = Var1;
return 1;
}
if ( Var0 == -1 || Var1 == -1 )
{
printf( "\n" );
Esop_CubeWrite( stdout, pCube0 );
Esop_CubeWrite( stdout, pCube1 );
printf( "Error: Esop_CubesDistTwo() looks at two equal cubes or dist1 cubes!\n" );
}
return 0;
}
/**Function*************************************************************
Synopsis [Makes the produce of two cubes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline Esop_Cube_t * Esop_CubesProduct( Esop_Man_t * p, Esop_Cube_t * pCube0, Esop_Cube_t * pCube1 )
{
Esop_Cube_t * pCube;
int i;
assert( pCube0->nVars == pCube1->nVars );
pCube = Esop_CubeAlloc( p );
for ( i = 0; i < p->nWords; i++ )
pCube->uData[i] = pCube0->uData[i] & pCube1->uData[i];
pCube->nLits = Esop_CubeCountLits( pCube );
return pCube;
}
/**Function*************************************************************
Synopsis [Makes the produce of two cubes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline Esop_Cube_t * Esop_CubesXor( Esop_Man_t * p, Esop_Cube_t * pCube0, Esop_Cube_t * pCube1 )
{
Esop_Cube_t * pCube;
int i;
assert( pCube0->nVars == pCube1->nVars );
pCube = Esop_CubeAlloc( p );
for ( i = 0; i < p->nWords; i++ )
pCube->uData[i] = pCube0->uData[i] ^ pCube1->uData[i];
pCube->nLits = Esop_CubeCountLits( pCube );
return pCube;
}
/**Function*************************************************************
Synopsis [Makes the produce of two cubes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int Esop_CubesAreEqual( Esop_Cube_t * pCube0, Esop_Cube_t * pCube1 )
{
int i;
for ( i = 0; i < (int)pCube0->nWords; i++ )
if ( pCube0->uData[i] != pCube1->uData[i] )
return 0;
return 1;
}
/**Function*************************************************************
Synopsis [Returns 1 if pCube1 is contained in pCube0, bitwise.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int Esop_CubeIsContained( Esop_Cube_t * pCube0, Esop_Cube_t * pCube1 )
{
int i;
for ( i = 0; i < (int)pCube0->nWords; i++ )
if ( (pCube0->uData[i] & pCube1->uData[i]) != pCube1->uData[i] )
return 0;
return 1;
}
/**Function*************************************************************
Synopsis [Transforms the cube into the result of merging.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Esop_CubesTransform( Esop_Cube_t * pCube, Esop_Cube_t * pDist, Esop_Cube_t * pMask )
{
int w;
for ( w = 0; w < (int)pCube->nWords; w++ )
{
pCube->uData[w] = pCube->uData[w] ^ pDist->uData[w];
pCube->uData[w] |= (pDist->uData[w] & ~pMask->uData[w]);
}
}
/**Function*************************************************************
Synopsis [Transforms the cube into the result of distance-1 merging.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Esop_CubesTransformOr( Esop_Cube_t * pCube, Esop_Cube_t * pDist )
{
int w;
for ( w = 0; w < (int)pCube->nWords; w++ )
pCube->uData[w] |= pDist->uData[w];
}
/**Function*************************************************************
Synopsis [Sorts the cover in the increasing number of literals.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Esop_CoverExpandRemoveEqual( Esop_Man_t * p, Esop_Cube_t * pCover )
{
Esop_Cube_t * pCube, * pCube2, * pThis;
if ( pCover == NULL )
{
Esop_ManClean( p, p->nVars );
return;
}
Esop_ManClean( p, pCover->nVars );
Esop_CoverForEachCubeSafe( pCover, pCube, pCube2 )
{
// go through the linked list
Esop_CoverForEachCube( p->ppStore[pCube->nLits], pThis )
if ( Esop_CubesAreEqual( pCube, pThis ) )
{
Esop_CubeRecycle( p, pCube );
break;
}
if ( pThis != NULL )
continue;
pCube->pNext = p->ppStore[pCube->nLits];
p->ppStore[pCube->nLits] = pCube;
p->nCubes++;
}
}
/**Function*************************************************************
Synopsis [Returns 1 if the given cube is contained in one of the cubes of the cover.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int Esop_CoverContainsCube( Esop_Man_t * p, Esop_Cube_t * pCube )
{
Esop_Cube_t * pThis;
int i;
/*
// this cube cannot be equal to any cube
Esop_CoverForEachCube( p->ppStore[pCube->nLits], pThis )
{
if ( Esop_CubesAreEqual( pCube, pThis ) )
{
Esop_CubeWrite( stdout, pCube );
assert( 0 );
}
}
*/
// try to find a containing cube
for ( i = 0; i <= (int)pCube->nLits; i++ )
Esop_CoverForEachCube( p->ppStore[i], pThis )
{
// skip the bubble
if ( pThis != p->pBubble && Esop_CubeIsContained( pThis, pCube ) )
return 1;
}
return 0;
}
#ifdef __cplusplus
}
#endif
#endif
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
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