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Add a new module which implements the fast extract with cube hashing (fxch) algorithm. 

Removes old partial implementation of this algorithm from the "pla" module.
This commit is contained in:
Bruno Schmitt 2016-05-11 19:41:31 -03:00
parent 8745fa8163
commit 3cf495c831
11 changed files with 2080 additions and 39 deletions
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2
Makefile
View File

@ -20,7 +20,7 @@ MODULES := \
src/misc/extra src/misc/mvc src/misc/st src/misc/util src/misc/nm \ src/misc/extra src/misc/mvc src/misc/st src/misc/util src/misc/nm \
src/misc/vec src/misc/hash src/misc/tim src/misc/bzlib src/misc/zlib \ src/misc/vec src/misc/hash src/misc/tim src/misc/bzlib src/misc/zlib \
src/misc/mem src/misc/bar src/misc/bbl src/misc/parse \ src/misc/mem src/misc/bar src/misc/bbl src/misc/parse \
src/opt/cut src/opt/fxu src/opt/rwr src/opt/mfs src/opt/sim \ src/opt/cut src/opt/fxu src/opt/fxch src/opt/rwr src/opt/mfs src/opt/sim \
src/opt/ret src/opt/fret src/opt/res src/opt/lpk src/opt/nwk src/opt/rwt \ src/opt/ret src/opt/fret src/opt/res src/opt/lpk src/opt/nwk src/opt/rwt \
src/opt/cgt src/opt/csw src/opt/dar src/opt/dau src/opt/sfm \ src/opt/cgt src/opt/csw src/opt/dar src/opt/dau src/opt/sfm \
src/sat/bsat src/sat/csat src/sat/msat src/sat/psat src/sat/cnf src/sat/bmc \ src/sat/bsat src/sat/csat src/sat/msat src/sat/psat src/sat/cnf src/sat/bmc \

100
src/base/abci/abc.c
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@ -23,6 +23,7 @@
#include "base/main/mainInt.h" #include "base/main/mainInt.h"
#include "proof/fraig/fraig.h" #include "proof/fraig/fraig.h"
#include "opt/fxu/fxu.h" #include "opt/fxu/fxu.h"
#include "opt/fxch/Fxch.h"
#include "opt/cut/cut.h" #include "opt/cut/cut.h"
#include "map/fpga/fpga.h" #include "map/fpga/fpga.h"
#include "map/if/if.h" #include "map/if/if.h"
@ -106,6 +107,7 @@ static int Abc_CommandRenode ( Abc_Frame_t * pAbc, int argc, cha
static int Abc_CommandCleanup ( Abc_Frame_t * pAbc, int argc, char ** argv ); static int Abc_CommandCleanup ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSweep ( Abc_Frame_t * pAbc, int argc, char ** argv ); static int Abc_CommandSweep ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandFastExtract ( Abc_Frame_t * pAbc, int argc, char ** argv ); static int Abc_CommandFastExtract ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandFxch ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandEliminate ( Abc_Frame_t * pAbc, int argc, char ** argv ); static int Abc_CommandEliminate ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandDisjoint ( Abc_Frame_t * pAbc, int argc, char ** argv ); static int Abc_CommandDisjoint ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandSparsify ( Abc_Frame_t * pAbc, int argc, char ** argv ); static int Abc_CommandSparsify ( Abc_Frame_t * pAbc, int argc, char ** argv );
@ -740,6 +742,7 @@ void Abc_Init( Abc_Frame_t * pAbc )
Cmd_CommandAdd( pAbc, "Synthesis", "cleanup", Abc_CommandCleanup, 1 ); Cmd_CommandAdd( pAbc, "Synthesis", "cleanup", Abc_CommandCleanup, 1 );
Cmd_CommandAdd( pAbc, "Synthesis", "sweep", Abc_CommandSweep, 1 ); Cmd_CommandAdd( pAbc, "Synthesis", "sweep", Abc_CommandSweep, 1 );
Cmd_CommandAdd( pAbc, "Synthesis", "fx", Abc_CommandFastExtract, 1 ); Cmd_CommandAdd( pAbc, "Synthesis", "fx", Abc_CommandFastExtract, 1 );
Cmd_CommandAdd( pAbc, "Synthesis", "fxch", Abc_CommandFxch, 1 );
Cmd_CommandAdd( pAbc, "Synthesis", "eliminate", Abc_CommandEliminate, 1 ); Cmd_CommandAdd( pAbc, "Synthesis", "eliminate", Abc_CommandEliminate, 1 );
Cmd_CommandAdd( pAbc, "Synthesis", "dsd", Abc_CommandDisjoint, 1 ); Cmd_CommandAdd( pAbc, "Synthesis", "dsd", Abc_CommandDisjoint, 1 );
Cmd_CommandAdd( pAbc, "Synthesis", "sparsify", Abc_CommandSparsify, 1 ); Cmd_CommandAdd( pAbc, "Synthesis", "sparsify", Abc_CommandSparsify, 1 );
@ -4119,6 +4122,103 @@ usage:
return 1; return 1;
} }
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static int Abc_CommandFxch( Abc_Frame_t * pAbc, int argc, char ** argv )
{
extern int Abc_NtkFxchPerform( Abc_Ntk_t * pNtk, int nMaxDivExt, int SMode, int fVerbose, int fVeryVerbose );
Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
int c,
nMaxDivExt,
SMode = 0,
fVerbose = 0,
fVeryVerbose = 0;
Extra_UtilGetoptReset();
while ( (c = Extra_UtilGetopt(argc, argv, "NSvwh")) != EOF )
{
switch (c)
{
case 'N':
if ( globalUtilOptind >= argc )
{
Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
goto usage;
}
nMaxDivExt = atoi( argv[globalUtilOptind] );
globalUtilOptind++;
if ( nMaxDivExt < 0 )
goto usage;
break;
case 'S':
SMode ^= 1;
break;
case 'v':
fVerbose ^= 1;
break;
case 'w':
fVeryVerbose ^= 1;
break;
case 'h':
goto usage;
break;
default:
goto usage;
}
}
if ( pNtk == NULL )
{
Abc_Print( -1, "Empty network.\n" );
return 1;
}
if ( Abc_NtkNodeNum( pNtk ) == 0 )
{
Abc_Print( -1, "The network does not have internal nodes.\n" );
return 1;
}
if ( !Abc_NtkIsLogic( pNtk ) )
{
Abc_Print( -1, "Fast extract can only be applied to a logic network (run \"renode\" or \"if\").\n" );
return 1;
}
if ( !Abc_NtkIsSopLogic( pNtk ) )
{
Abc_Print( -1, "Fast extract can only be applied to a logic network with SOP local functions (run \"bdd; sop\").\n" );
return 1;
}
Abc_NtkFxchPerform( pNtk, nMaxDivExt, SMode, fVerbose, fVeryVerbose );
return 0;
usage:
Abc_Print( -2, "usage: fxch [-N <num>] [-vwh]\n");
Abc_Print( -2, "\t performs fast extract with cube hashing on the current network\n");
Abc_Print( -2, "\t-N <num> : max number of divisors to extract during this run [default = %d]\n", nMaxDivExt );
Abc_Print( -2, "\t-S : memory saving mode (slower) [default = %d]\n", SMode );
Abc_Print( -2, "\t-v : print verbose information [default = %s]\n", fVerbose? "yes": "no" );
Abc_Print( -2, "\t-w : print additional information [default = %s]\n", fVeryVerbose? "yes": "no" );
Abc_Print( -2, "\t-h : print the command usage\n");
return 1;
}
/**Function************************************************************* /**Function*************************************************************
Synopsis [] Synopsis []

1
src/base/pla/module.make
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@ -1,6 +1,5 @@
SRC += src/base/pla/plaCom.c \ SRC += src/base/pla/plaCom.c \
src/base/pla/plaHash.c \ src/base/pla/plaHash.c \
src/base/pla/plaFxch.c \
src/base/pla/plaMan.c \ src/base/pla/plaMan.c \
src/base/pla/plaMerge.c \ src/base/pla/plaMerge.c \
src/base/pla/plaSimple.c \ src/base/pla/plaSimple.c \

4
src/base/pla/pla.h
View File

@ -268,8 +268,7 @@ static inline void Pla_ManPrintStats( Pla_Man_t * p, int fVerbose )
} }
/*=== plaFxch.c ========================================================*/
extern int Pla_ManPerformFxch( Pla_Man_t * p );
/*=== plaHash.c ========================================================*/ /*=== plaHash.c ========================================================*/
extern int Pla_ManHashDist1NumTest( Pla_Man_t * p ); extern int Pla_ManHashDist1NumTest( Pla_Man_t * p );
extern void Pla_ManComputeDist1Test( Pla_Man_t * p ); extern void Pla_ManComputeDist1Test( Pla_Man_t * p );
@ -296,4 +295,3 @@ ABC_NAMESPACE_HEADER_END
//////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////
/// END OF FILE /// /// END OF FILE ///
//////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////

3
src/base/pla/plaCom.c
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@ -488,7 +488,7 @@ int Abc_CommandTest( Abc_Frame_t * pAbc, int argc, char ** argv )
//Pla_ManFxPerformSimple( nVars ); //Pla_ManFxPerformSimple( nVars );
//Pla_ManConvertFromBits( p ); //Pla_ManConvertFromBits( p );
//Pla_ManConvertToBits( p ); //Pla_ManConvertToBits( p );
Pla_ManPerformFxch( p ); //Pla_ManPerformFxch( p );
return 0; return 0;
usage: usage:
Abc_Print( -2, "usage: |test [-N num] [-vh]\n" ); Abc_Print( -2, "usage: |test [-N num] [-vh]\n" );
@ -505,4 +505,3 @@ usage:
ABC_NAMESPACE_IMPL_END ABC_NAMESPACE_IMPL_END

140
src/opt/fxch/Fxch.c Normal file
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@ -0,0 +1,140 @@
/**CFile****************************************************************
FileName [ Fxch.c ]
PackageName [ Fast eXtract with Cube Hashing (FXCH) ]
Synopsis [ The entrance into the fast extract module. ]
Author [ Bruno Schmitt - boschmitt at inf.ufrgs.br ]
Affiliation [ UFRGS ]
Date [ Ver. 1.0. Started - March 6, 2016. ]
Revision []
***********************************************************************/
#include "Fxch.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [ Performs fast extract with cube hashing on a set
of covers. ]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Fxch_FastExtract( Vec_Wec_t* vCubes,
int ObjIdMax,
int nMaxDivExt,
int SMode,
int fVerbose,
int fVeryVerbose )
{
abctime TempTime;
Fxch_Man_t* pFxchMan = Fxch_ManAlloc( vCubes, SMode );
TempTime = Abc_Clock();
Fxch_ManMapLiteralsIntoCubes( pFxchMan, ObjIdMax );
Fxch_ManGenerateLitHashKeys( pFxchMan );
Fxch_ManComputeLevel( pFxchMan );
Fxch_ManSCHashTablesInit( pFxchMan );
Fxch_ManDivCreate( pFxchMan );
pFxchMan->timeInit = Abc_Clock() - TempTime;
if ( fVeryVerbose )
Fxch_ManPrintDivs( pFxchMan );
if ( fVerbose )
Fxch_ManPrintStats( pFxchMan );
TempTime = Abc_Clock();
for ( int i = 0; i < nMaxDivExt && Vec_QueTopPriority( pFxchMan->vDivPrio ) > 0.0; i++ )
{
int iDiv = Vec_QuePop( pFxchMan->vDivPrio );
if ( fVeryVerbose )
Fxch_DivPrint( pFxchMan, iDiv );
Fxch_ManUpdate( pFxchMan, iDiv );
}
pFxchMan->timeExt = Abc_Clock() - TempTime;
if ( fVerbose )
{
Fxch_ManPrintStats( pFxchMan );
Abc_PrintTime( 1, "\n[FXCH] Elapsed Time", pFxchMan->timeInit + pFxchMan->timeExt );
Abc_PrintTime( 1, "[FXCH] +-> Init", pFxchMan->timeInit );
Abc_PrintTime( 1, "[FXCH] +-> Extr", pFxchMan->timeExt );
}
Fxch_ManSCHashTablesFree( pFxchMan );
Fxch_ManFree( pFxchMan );
Vec_WecRemoveEmpty( vCubes );
return 1;
}
/**Function*************************************************************
Synopsis [ Retrives the necessary information for the fast extract
with cube hashing. ]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkFxchPerform( Abc_Ntk_t* pNtk,
int nMaxDivExt,
int SMode,
int fVerbose,
int fVeryVerbose )
{
Vec_Wec_t* vCubes;
assert( Abc_NtkIsSopLogic( pNtk ) );
if ( !Abc_NtkFxCheck( pNtk ) )
{
printf( "Abc_NtkFxchPerform(): Nodes have duplicated fanins. FXCH is not performed.\n" );
return 0;
}
vCubes = Abc_NtkFxRetrieve( pNtk );
if ( Fxch_FastExtract( vCubes, Abc_NtkObjNumMax( pNtk ), nMaxDivExt, SMode, fVerbose, fVeryVerbose ) > 0 )
{
Abc_NtkFxInsert( pNtk, vCubes );
Vec_WecFree( vCubes );
if ( !Abc_NtkCheck( pNtk ) )
printf( "Abc_NtkFxchPerform(): The network check has failed.\n" );
return 1;
}
else
printf( "Warning: The network has not been changed by \"fxch\".\n" );
Vec_WecFree( vCubes );
return 0;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END

218
src/opt/fxch/Fxch.h Normal file
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@ -0,0 +1,218 @@
/**CFile****************************************************************
FileName [ Fxch.h ]
PackageName [ Fast eXtract with Cube Hashing (FXCH) ]
Synopsis [ External declarations of fast extract with cube hashing. ]
Author [ Bruno Schmitt - boschmitt at inf.ufrgs.br ]
Affiliation [ UFRGS ]
Date [ Ver. 1.0. Started - March 6, 2016. ]
Revision []
***********************************************************************/
#ifndef ABC__opt__fxch__fxch_h
#define ABC__opt__fxch__fxch_h
#include "base/abc/abc.h"
#include "misc/vec/vecHsh.h"
#include "misc/vec/vecQue.h"
#include "misc/vec/vecVec.h"
#include "misc/vec/vecWec.h"
ABC_NAMESPACE_HEADER_START
////////////////////////////////////////////////////////////////////////
/// TYPEDEF DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
typedef struct Fxch_Man_t_ Fxch_Man_t;
typedef struct Fxch_SubCube_t_ Fxch_SubCube_t;
typedef struct Fxch_SCHashTable_t_ Fxch_SCHashTable_t;
typedef struct Fxch_SCHashTable_Entry_t_ Fxch_SCHashTable_Entry_t;
////////////////////////////////////////////////////////////////////////
/// STRUCTURES DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/* Sub-Cube Structure
*
* In the context of this program, a sub-cube is a cube derived from
* another cube by removing one or two literals. Since a cube is represented
* as a vector of literals, one might think that a sub-cube would also be
* represented in the same way. However, in order to same memory, we only
* store a sub-cube identifier and the data necessary to generate the sub-cube:
* - The index number of the orignal cube in the cover. (iCube)
* - Identifiers of which literal(s) was(were) removed. (iLit0, iLit1)
*
* The sub-cube identifier is generated by adding the unique identifiers of
* its literals.
*
*/
struct Fxch_SubCube_t_
{
unsigned int Id,
iCube;
unsigned int iLit0 : 16,
iLit1 : 16;
};
/* Sub-cube Hash Table
*
*/
struct Fxch_SCHashTable_Entry_t_
{
Fxch_SubCube_t SCData;
unsigned int iTable : 31,
Used : 1;
unsigned int iPrev,
iNext;
};
struct Fxch_SCHashTable_t_
{
Fxch_Man_t* pFxchMan;
/* Internal data */
Fxch_SCHashTable_Entry_t* pBins;
unsigned int nEntries,
SizeMask;
Vec_Int_t* vCubeLinks;
/* Temporary data */
Vec_Int_t vSubCube0;
Vec_Int_t vSubCube1;
};
struct Fxch_Man_t_
{
/* user's data */
Vec_Wec_t* vCubes;
int LitCountMax;
/* internal data */
Fxch_SCHashTable_t* pSCHashTable;
Vec_Wec_t* vLits; /* lit -> cube */
Vec_Int_t* vLitCount; /* literal counts (currently not used) */
Vec_Int_t* vLitHashKeys; /* Literal hash keys used to generate subcube hash */
Hsh_VecMan_t* pDivHash;
Vec_Flt_t* vDivWeights; /* divisor weights */
Vec_Que_t* vDivPrio; /* priority queue for divisors by weight */
Vec_Wec_t* vDivCubePairs; /* cube pairs for each div */
Vec_Int_t* vLevels; /* variable levels */
// temporary data to update the data-structure when a divisor is extracted
Vec_Int_t* vCubesS; /* cubes for the given single cube divisor */
Vec_Int_t* vPairs; /* cube pairs for the given double cube divisor */
Vec_Int_t* vCubeFree; // cube-free divisor
Vec_Int_t* vDiv; // selected divisor
/* Config */
char SMode; /* Saving Memory mode */
/* Statistics */
abctime timeInit; /* Initialization time */
abctime timeExt; /* Extraction time */
int nVars; // original problem variables
int nLits; // the number of SOP literals
int nPairsS; // number of lit pairs
int nPairsD; // number of cube pairs
int nExtDivs; /* Number of extracted divisor */
};
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/* The following functions are from abcFx.c
* They are use in order to retrive SOP information for fast_extract
* Since I want an implementation that change only the core part of
* the algorithm I'm using this */
extern Vec_Wec_t* Abc_NtkFxRetrieve( Abc_Ntk_t* pNtk );
extern void Abc_NtkFxInsert( Abc_Ntk_t* pNtk, Vec_Wec_t* vCubes );
extern int Abc_NtkFxCheck( Abc_Ntk_t* pNtk );
/*===== Fxch.c =======================================================*/
int Abc_NtkFxchPerform( Abc_Ntk_t* pNtk, int nMaxDivExt, int SMode, int fVerbose, int fVeryVerbose );
int Fxch_FastExtract( Vec_Wec_t* vCubes, int ObjIdMax, int nMaxDivExt, int SMode, int fVerbose, int fVeryVerbose );
/*===== FxchDiv.c ====================================================================================================*/
int Fxch_DivCreate( Fxch_Man_t* pFxchMan, Fxch_SubCube_t* pSubCube0, Fxch_SubCube_t* pSubCube1 );
int Fxch_DivAdd( Fxch_Man_t* pFxchMan, int fUpdate, int fSingleCube, int fBase );
int Fxch_DivRemove( Fxch_Man_t* pFxchMan, int fUpdate, int fSingleCube, int fBase );
void Fxch_DivSepareteCubes( Vec_Int_t* vDiv, Vec_Int_t* vCube0, Vec_Int_t* vCube1 );
int Fxch_DivRemoveLits( Vec_Int_t* vCube0, Vec_Int_t* vCube1, Vec_Int_t* vDiv, int *fCompl );
void Fxch_DivPrint( Fxch_Man_t* pFxchMan, int iDiv );
/* XXX: The following functions were adapted from "fx" to be used by the Saving Memory mode */
void Fxch_DivFindPivots( Vec_Int_t* vDiv, int* pLit0, int* pLit1 );
int Fxch_DivFind( Vec_Int_t* vCube0, Vec_Int_t* vCube1, Vec_Int_t* vCubeFree );
void Fxch_DivFindCubePairs( Fxch_Man_t* pFxchMan, Vec_Int_t* vCubes_Lit0, Vec_Int_t* vCubes_Lit1 );
/*===== FxchMan.c ====================================================================================================*/
Fxch_Man_t* Fxch_ManAlloc( Vec_Wec_t* vCubes, char SMode );
void Fxch_ManFree( Fxch_Man_t* pFxchMan );
void Fxch_ManMapLiteralsIntoCubes( Fxch_Man_t* pFxchMan, int nVars );
void Fxch_ManGenerateLitHashKeys( Fxch_Man_t* pFxchMan );
void Fxch_ManSCHashTablesInit( Fxch_Man_t* pFxchMan );
void Fxch_ManSCHashTablesFree( Fxch_Man_t* pFxchMan );
void Fxch_ManDivCreate( Fxch_Man_t* pFxchMan );
int Fxch_ManComputeLevelDiv( Fxch_Man_t* pFxchMan, Vec_Int_t* vCubeFree );
int Fxch_ManComputeLevelCube( Fxch_Man_t* pFxchMan, Vec_Int_t* vCube );
void Fxch_ManComputeLevel( Fxch_Man_t* pFxchMan );
void Fxch_ManUpdate( Fxch_Man_t* pFxchMan, int iDiv );
void Fxch_ManPrintDivs( Fxch_Man_t* pFxchMan );
void Fxch_ManPrintStats( Fxch_Man_t* pFxchMan );
static inline Vec_Int_t* Fxch_ManGetCube( Fxch_Man_t* pFxchMan,
int iCube )
{
return Vec_WecEntry( pFxchMan->vCubes, iCube );
}
static inline int Fxch_ManGetLit( Fxch_Man_t* pFxchMan,
int iCube,
int iLit )
{
return Vec_IntEntry( Vec_WecEntry(pFxchMan->vCubes, iCube), iLit );
}
/*===== FxchSCHashTable.c ============================================*/
Fxch_SCHashTable_t* Fxch_SCHashTableCreate( Fxch_Man_t* pFxchMan, Vec_Int_t* vCubeLinks, int nEntries );
void Fxch_SCHashTableDelete( Fxch_SCHashTable_t* );
int Fxch_SCHashTableInsert( Fxch_SCHashTable_t* pSCHashTable,
Vec_Wec_t* vCubes,
unsigned int SubCubeID,
unsigned int iSubCube,
unsigned int iCube,
unsigned int iLit0,
unsigned int iLit1,
char fUpdate );
int Fxch_SCHashTableRemove( Fxch_SCHashTable_t* pSCHashTable,
Vec_Wec_t* vCubes,
unsigned int SubCubeID,
unsigned int iSubCube,
unsigned int iCube,
unsigned int iLit0,
unsigned int iLit1,
char fUpdate );
unsigned int Fxch_SCHashTableMemory( Fxch_SCHashTable_t* );
void Fxch_SCHashTablePrint( Fxch_SCHashTable_t* );
ABC_NAMESPACE_HEADER_END
#endif
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////

582
src/opt/fxch/FxchDiv.c Normal file
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@ -0,0 +1,582 @@
/**CFile****************************************************************************************************************
FileName [ FxchDiv.c ]
PackageName [ Fast eXtract with Cube Hashing (FXCH) ]
Synopsis [ Divisor handling functions ]
Author [ Bruno Schmitt - boschmitt at inf.ufrgs.br ]
Affiliation [ UFRGS ]
Date [ Ver. 1.0. Started - March 6, 2016. ]
Revision []
***********************************************************************************************************************/
#include "Fxch.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// FUNCTION DEFINITIONS
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
static inline int Fxch_DivNormalize( Vec_Int_t* vCubeFree )
{
int * L = Vec_IntArray(vCubeFree);
int RetValue = 0, LitA0 = -1, LitB0 = -1, LitA1 = -1, LitB1 = -1;
assert( Vec_IntSize(vCubeFree) == 4 );
if ( Abc_LitIsCompl(L[0]) != Abc_LitIsCompl(L[1]) && (L[0] >> 2) == (L[1] >> 2) ) // diff cubes, same vars
{
if ( Abc_LitIsCompl(L[2]) == Abc_LitIsCompl(L[3]) )
return -1;
LitA0 = Abc_Lit2Var(L[0]), LitB0 = Abc_Lit2Var(L[1]);
if ( Abc_LitIsCompl(L[0]) == Abc_LitIsCompl(L[2]) )
{
assert( Abc_LitIsCompl(L[1]) == Abc_LitIsCompl(L[3]) );
LitA1 = Abc_Lit2Var(L[2]), LitB1 = Abc_Lit2Var(L[3]);
}
else
{
assert( Abc_LitIsCompl(L[0]) == Abc_LitIsCompl(L[3]) );
assert( Abc_LitIsCompl(L[1]) == Abc_LitIsCompl(L[2]) );
LitA1 = Abc_Lit2Var(L[3]), LitB1 = Abc_Lit2Var(L[2]);
}
}
else if ( Abc_LitIsCompl(L[1]) != Abc_LitIsCompl(L[2]) && (L[1] >> 2) == (L[2] >> 2) )
{
if ( Abc_LitIsCompl(L[0]) == Abc_LitIsCompl(L[3]) )
return -1;
LitA0 = Abc_Lit2Var(L[1]), LitB0 = Abc_Lit2Var(L[2]);
if ( Abc_LitIsCompl(L[1]) == Abc_LitIsCompl(L[0]) )
LitA1 = Abc_Lit2Var(L[0]), LitB1 = Abc_Lit2Var(L[3]);
else
LitA1 = Abc_Lit2Var(L[3]), LitB1 = Abc_Lit2Var(L[0]);
}
else if ( Abc_LitIsCompl(L[2]) != Abc_LitIsCompl(L[3]) && (L[2] >> 2) == (L[3] >> 2) )
{
if ( Abc_LitIsCompl(L[0]) == Abc_LitIsCompl(L[1]) )
return -1;
LitA0 = Abc_Lit2Var(L[2]), LitB0 = Abc_Lit2Var(L[3]);
if ( Abc_LitIsCompl(L[2]) == Abc_LitIsCompl(L[0]) )
LitA1 = Abc_Lit2Var(L[0]), LitB1 = Abc_Lit2Var(L[1]);
else
LitA1 = Abc_Lit2Var(L[1]), LitB1 = Abc_Lit2Var(L[0]);
}
else
return -1;
assert( LitA0 == Abc_LitNot(LitB0) );
if ( Abc_LitIsCompl(LitA0) )
{
ABC_SWAP( int, LitA0, LitB0 );
ABC_SWAP( int, LitA1, LitB1 );
}
assert( !Abc_LitIsCompl(LitA0) );
if ( Abc_LitIsCompl(LitA1) )
{
LitA1 = Abc_LitNot(LitA1);
LitB1 = Abc_LitNot(LitB1);
RetValue = 1;
}
assert( !Abc_LitIsCompl(LitA1) );
// arrange literals in such as a way that
// - the first two literals are control literals from different cubes
// - the third literal is non-complented data input
// - the forth literal is possibly complemented data input
L[0] = Abc_Var2Lit( LitA0, 0 );
L[1] = Abc_Var2Lit( LitB0, 1 );
L[2] = Abc_Var2Lit( LitA1, 0 );
L[3] = Abc_Var2Lit( LitB1, 1 );
return RetValue;
}
/**Function*************************************************************
Synopsis [ Creates a Divisor. ]
Description [ This functions receive as input two sub-cubes and creates
a divisor using their information. The divisor is stored
in vCubeFree vector of the pFxchMan structure.
It returns the base value, which is the number of elements
that the cubes pair used to generate the devisor have in
common. ]
SideEffects []
SeeAlso []
***********************************************************************/
int Fxch_DivCreate( Fxch_Man_t* pFxchMan,
Fxch_SubCube_t* pSubCube0,
Fxch_SubCube_t* pSubCube1 )
{
int Base = 0;
Vec_IntClear( pFxchMan->vCubeFree );
int SC0_Lit0,
SC0_Lit1,
SC1_Lit0,
SC1_Lit1;
SC0_Lit0 = Fxch_ManGetLit( pFxchMan, pSubCube0->iCube, pSubCube0->iLit0 );
SC0_Lit1 = 0;
SC1_Lit0 = Fxch_ManGetLit( pFxchMan, pSubCube1->iCube, pSubCube1->iLit0 );
SC1_Lit1 = 0;
if ( pSubCube0->iLit1 == 0 && pSubCube1->iLit1 == 0 )
{
Vec_IntPush( pFxchMan->vCubeFree, SC0_Lit0 );
Vec_IntPush( pFxchMan->vCubeFree, SC1_Lit0 );
}
else if ( pSubCube0->iLit1 > 0 && pSubCube1->iLit1 > 0 )
{
SC0_Lit1 = Fxch_ManGetLit( pFxchMan, pSubCube0->iCube, pSubCube0->iLit1 );
SC1_Lit1 = Fxch_ManGetLit( pFxchMan, pSubCube1->iCube, pSubCube1->iLit1 );
Vec_IntPush( pFxchMan->vCubeFree, Abc_Var2Lit( SC0_Lit0, 0 ) );
Vec_IntPush( pFxchMan->vCubeFree, Abc_Var2Lit( SC1_Lit0, 1 ) );
Vec_IntPush( pFxchMan->vCubeFree, Abc_Var2Lit( SC0_Lit1, 0 ) );
Vec_IntPush( pFxchMan->vCubeFree, Abc_Var2Lit( SC1_Lit1, 1 ) );
int RetValue = Fxch_DivNormalize( pFxchMan->vCubeFree );
if ( RetValue == -1 )
return -1;
}
else
{
if ( pSubCube0->iLit1 > 0 )
{
SC0_Lit1 = Fxch_ManGetLit( pFxchMan, pSubCube0->iCube, pSubCube0->iLit1 );
Vec_IntPush( pFxchMan->vCubeFree, SC1_Lit0 );
if ( SC0_Lit0 == Abc_LitNot( SC1_Lit0 ) )
Vec_IntPush( pFxchMan->vCubeFree, SC0_Lit1 );
else if ( SC0_Lit1 == Abc_LitNot( SC1_Lit0 ) )
Vec_IntPush( pFxchMan->vCubeFree, SC0_Lit0 );
}
else
{
SC1_Lit1 = Fxch_ManGetLit( pFxchMan, pSubCube1->iCube, pSubCube1->iLit1 );
Vec_IntPush( pFxchMan->vCubeFree, SC0_Lit0 );
if ( SC1_Lit0 == Abc_LitNot( SC0_Lit0 ) )
Vec_IntPush( pFxchMan->vCubeFree, SC1_Lit1 );
else if ( SC1_Lit1 == Abc_LitNot( SC0_Lit0 ) )
Vec_IntPush( pFxchMan->vCubeFree, SC1_Lit0 );
}
}
if ( Vec_IntSize( pFxchMan->vCubeFree ) == 0 )
return -1;
if ( Vec_IntSize ( pFxchMan->vCubeFree ) == 2 )
{
Vec_IntSort( pFxchMan->vCubeFree, 0 );
Vec_IntWriteEntry( pFxchMan->vCubeFree, 0, Abc_Var2Lit( Vec_IntEntry( pFxchMan->vCubeFree, 0 ), 0 ) );
Vec_IntWriteEntry( pFxchMan->vCubeFree, 1, Abc_Var2Lit( Vec_IntEntry( pFxchMan->vCubeFree, 1 ), 1 ) );
}
int Cube0Size = Vec_IntSize( Fxch_ManGetCube( pFxchMan, pSubCube0->iCube ) ),
Cube1Size = Vec_IntSize( Fxch_ManGetCube( pFxchMan, pSubCube1->iCube ) );
if ( Vec_IntSize( pFxchMan->vCubeFree ) % 2 == 0 )
{
Base = Abc_MinInt( Cube0Size, Cube1Size )
-( Vec_IntSize( pFxchMan->vCubeFree ) / 2) - 1; /* 1 or 2 Lits, 1 SOP NodeID */
}
else
return -1;
return Base;
}
/**Function*************************************************************
Synopsis [ Add a divisor to the divisors hash table. ]
Description [ This functions will try to add the divisor store in
vCubeFree to the divisor hash table. If the divisor
is already present in the hash table it will just
increment its weight, otherwise it will add the divisor
and asign an initial weight. ]
SideEffects [ If the fUpdate option is set, the function will also
update the divisor priority queue. ]
SeeAlso []
***********************************************************************/
int Fxch_DivAdd( Fxch_Man_t* pFxchMan,
int fUpdate,
int fSingleCube,
int fBase )
{
int iDiv = Hsh_VecManAdd( pFxchMan->pDivHash, pFxchMan->vCubeFree );
/* Verify if the divisor already exist */
if ( iDiv == Vec_FltSize( pFxchMan->vDivWeights ) )
{
if ( pFxchMan->SMode == 0 )
Vec_WecPushLevel( pFxchMan->vDivCubePairs );
/* Assign initial weight */
if ( fSingleCube )
{
Vec_FltPush( pFxchMan->vDivWeights,
-Vec_IntSize( pFxchMan->vCubeFree ) + 0.9
-0.001 * Fxch_ManComputeLevelDiv( pFxchMan, pFxchMan->vCubeFree ) );
}
else
{
Vec_FltPush( pFxchMan->vDivWeights,
-Vec_IntSize( pFxchMan->vCubeFree ) + 0.9
-0.0009 * Fxch_ManComputeLevelDiv( pFxchMan, pFxchMan->vCubeFree ) );
}
}
/* Increment weight */
if ( fSingleCube )
Vec_FltAddToEntry( pFxchMan->vDivWeights, iDiv, 1 );
else
Vec_FltAddToEntry( pFxchMan->vDivWeights, iDiv, fBase + Vec_IntSize( pFxchMan->vCubeFree ) - 1 );
assert( iDiv < Vec_FltSize( pFxchMan->vDivWeights ) );
if ( fUpdate )
if ( pFxchMan->vDivPrio )
{
if ( Vec_QueIsMember( pFxchMan->vDivPrio, iDiv ) )
Vec_QueUpdate( pFxchMan->vDivPrio, iDiv );
else
Vec_QuePush( pFxchMan->vDivPrio, iDiv );
}
return iDiv;
}
/**Function*************************************************************
Synopsis [ Removes a divisor to the divisors hash table. ]
Description [ This function don't effectively removes a divisor from
the hash table (the hash table implementation don't
support such operation). It only assures its existence
and decrement its weight. ]
SideEffects [ If the fUpdate option is set, the function will also
update the divisor priority queue. ]
SeeAlso []
***********************************************************************/
int Fxch_DivRemove( Fxch_Man_t* pFxchMan,
int fUpdate,
int fSingleCube,
int fBase )
{
int iDiv = Hsh_VecManAdd( pFxchMan->pDivHash, pFxchMan->vCubeFree );
assert( iDiv < Vec_FltSize( pFxchMan->vDivWeights ) );
/* Decrement weight */
if ( fSingleCube )
Vec_FltAddToEntry( pFxchMan->vDivWeights, iDiv, -1 );
else
Vec_FltAddToEntry( pFxchMan->vDivWeights, iDiv, -( fBase + Vec_IntSize( pFxchMan->vCubeFree ) - 1 ) );
if ( fUpdate )
if ( pFxchMan->vDivPrio )
{
if ( Vec_QueIsMember( pFxchMan->vDivPrio, iDiv ) )
Vec_QueUpdate( pFxchMan->vDivPrio, iDiv );
}
return iDiv;
}
/**Function*************************************************************
Synopsis [ Separete the cubes in present in a divisor ]
Description [ In this implementation *all* stored divsors are composed
of two cubes.
In order to save space and to be able to use the Vec_Int_t
hash table both cubes are stored in the same vector - using
a little hack to differentiate which literal belongs to each
cube.
This function separetes the two cubes in their own vectors
so that they can be added to the cover.
*Note* that this also applies to single cube
divisors beacuse of the DeMorgan Law: ab = ( a! + !b )! ]
SideEffects []
SeeAlso []
***********************************************************************/
void Fxch_DivSepareteCubes( Vec_Int_t* vDiv,
Vec_Int_t* vCube0,
Vec_Int_t* vCube1 )
{
int* pArray;
int i,
Lit;
Vec_IntForEachEntry( vDiv, Lit, i )
if ( Abc_LitIsCompl(Lit) )
Vec_IntPush( vCube1, Abc_Lit2Var( Lit ) );
else
Vec_IntPush( vCube0, Abc_Lit2Var( Lit ) );
if ( ( Vec_IntSize( vDiv ) == 4 ) && ( Vec_IntSize( vCube0 ) == 3 ) )
{
assert( Vec_IntSize( vCube1 ) == 3 );
pArray = Vec_IntArray( vCube0 );
if ( pArray[1] > pArray[2] )
ABC_SWAP( int, pArray[1], pArray[2] );
pArray = Vec_IntArray( vCube1 );
if ( pArray[1] > pArray[2] )
ABC_SWAP( int, pArray[1], pArray[2] );
}
}
/**Function*************************************************************
Synopsis [ Removes the literals present in the divisor from their
original cubes. ]
Description [ This function returns the numeber of removed literals
which should be equal to the size of the divisor. ]
SideEffects []
SeeAlso []
***********************************************************************/
int Fxch_DivRemoveLits( Vec_Int_t* vCube0,
Vec_Int_t* vCube1,
Vec_Int_t* vDiv,
int *fCompl )
{
int i,
Lit,
CountP = 0,
CountN = 0,
Count = 0,
ret = 0;
Vec_IntForEachEntry( vDiv, Lit, i )
if ( Abc_LitIsCompl( Abc_Lit2Var( Lit ) ) )
CountN += Vec_IntRemove1( vCube0, Abc_Lit2Var( Lit ) );
else
CountP += Vec_IntRemove1( vCube0, Abc_Lit2Var( Lit ) );
Vec_IntForEachEntry( vDiv, Lit, i )
Count += Vec_IntRemove1( vCube1, Abc_Lit2Var( Lit ) );
if ( Vec_IntSize( vDiv ) == 2 )
Vec_IntForEachEntry( vDiv, Lit, i )
{
Vec_IntRemove1( vCube0, Abc_LitNot( Abc_Lit2Var( Lit ) ) );
Vec_IntRemove1( vCube1, Abc_LitNot( Abc_Lit2Var( Lit ) ) );
}
ret = Count + CountP + CountN;
if ( Vec_IntSize( vDiv ) == 4 )
{
int Lit0 = Abc_Lit2Var( Vec_IntEntry( vDiv, 0 ) ),
Lit1 = Abc_Lit2Var( Vec_IntEntry( vDiv, 1 ) ),
Lit2 = Abc_Lit2Var( Vec_IntEntry( vDiv, 2 ) ),
Lit3 = Abc_Lit2Var( Vec_IntEntry( vDiv, 3 ) );
if ( Lit0 == Abc_LitNot( Lit1 ) && Lit2 == Abc_LitNot( Lit3 ) && CountN == 1 )
*fCompl = 1;
if ( Lit0 == Abc_LitNot( Lit1 ) && ret == 2 )
{
*fCompl = 1;
Vec_IntForEachEntry( vDiv, Lit, i )
ret += Vec_IntRemove1( vCube0, ( Abc_Lit2Var( Lit ) ^ (fCompl && i > 1) ) );
Vec_IntForEachEntry( vDiv, Lit, i )
ret += Vec_IntRemove1( vCube1, ( Abc_Lit2Var( Lit ) ^ (fCompl && i > 1) ) );
}
}
return ret;
}
/**Function*************************************************************
Synopsis [ Print the divisor identified by iDiv. ]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Fxch_DivPrint( Fxch_Man_t* pFxchMan,
int iDiv )
{
Vec_Int_t* vDiv = Hsh_VecReadEntry( pFxchMan->pDivHash, iDiv );
int i,
Lit;
printf( "Div %7d : ", iDiv );
printf( "Weight %12.5f ", Vec_FltEntry( pFxchMan->vDivWeights, iDiv ) );
Vec_IntForEachEntry( vDiv, Lit, i )
if ( !Abc_LitIsCompl( Lit ) )
printf( "%d(1)", Abc_Lit2Var( Lit ) );
printf( " + " );
Vec_IntForEachEntry( vDiv, Lit, i )
if ( Abc_LitIsCompl( Lit ) )
printf( "%d(2)", Abc_Lit2Var( Lit ) );
printf( " Lits =%7d ", pFxchMan->nLits );
printf( "Divs =%8d \n", Hsh_VecSize( pFxchMan->pDivHash ) );
}
/* XXX: The following functions were adapted from "fx" to be used by the Saving Memory mode */
void Fxch_DivFindPivots( Vec_Int_t* vDiv,
int* pLit0,
int* pLit1 )
{
int i,
Lit;
* pLit0 = -1;
* pLit1 = -1;
Vec_IntForEachEntry( vDiv, Lit, i )
{
if ( Abc_LitIsCompl( Lit ) )
{
if ( *pLit1 == -1 )
*pLit1 = Abc_Lit2Var( Lit );
}
else
{
if ( *pLit0 == -1 )
*pLit0 = Abc_Lit2Var( Lit );
}
if ( *pLit0 >= 0 && *pLit1 >= 0 )
return;
}
}
int Fxch_DivFind( Vec_Int_t* vCube0,
Vec_Int_t* vCube1,
Vec_Int_t* vCubeFree )
{
int Counter = 0,
fAttr0 = 0,
fAttr1 = 1;
int* pBeg1 = vCube0->pArray + 1,
* pBeg2 = vCube1->pArray + 1,
* pEnd1 = vCube0->pArray + vCube0->nSize,
* pEnd2 = vCube1->pArray + vCube1->nSize;
Vec_IntClear( vCubeFree );
while ( pBeg1 < pEnd1 && pBeg2 < pEnd2 )
{
if ( *pBeg1 == *pBeg2 )
{
pBeg1++;
pBeg2++;
Counter++;
}
else if ( *pBeg1 < *pBeg2 )
Vec_IntPush( vCubeFree, Abc_Var2Lit( *pBeg1++, fAttr0 ) );
else
{
if ( Vec_IntSize( vCubeFree ) == 0 )
fAttr0 = 1, fAttr1 = 0;
Vec_IntPush( vCubeFree, Abc_Var2Lit( *pBeg2++, fAttr1) );
}
}
while ( pBeg1 < pEnd1 )
Vec_IntPush( vCubeFree, Abc_Var2Lit( *pBeg1++, fAttr0 ) );
while ( pBeg2 < pEnd2 )
Vec_IntPush( vCubeFree, Abc_Var2Lit( *pBeg2++, fAttr1 ) );
assert( !Abc_LitIsCompl( Vec_IntEntry(vCubeFree, 0) ) );
return Counter;
}
void Fxch_DivFindCubePairs( Fxch_Man_t* pFxchMan,
Vec_Int_t* vCubes_Lit0,
Vec_Int_t* vCubes_Lit1 )
{
int* pBeg1 = vCubes_Lit0->pArray + 1,
* pBeg2 = vCubes_Lit1->pArray + 1,
* pEnd1 = vCubes_Lit0->pArray + vCubes_Lit0->nSize,
* pEnd2 = vCubes_Lit1->pArray + vCubes_Lit1->nSize;
Vec_IntClear( pFxchMan->vPairs );
while ( pBeg1 < pEnd1 && pBeg2 < pEnd2 )
{
int CubeId1 = Fxch_ManGetLit( pFxchMan, *pBeg1, 0 ),
CubeId2 = Fxch_ManGetLit( pFxchMan, *pBeg2, 0 ),
i, k;
if ( CubeId1 == CubeId2 )
{
for ( i = 1; pBeg1+i < pEnd1; i++ )
if ( CubeId1 != Fxch_ManGetLit( pFxchMan, pBeg1[i], 0) )
break;
for ( k = 1; pBeg2+k < pEnd2; k++ )
if ( CubeId1 != Fxch_ManGetLit( pFxchMan, pBeg2[k], 0) )
break;
for ( int i_ = 0; i_ < i; i_++ )
for ( int k_ = 0; k_ < k; k_++ )
{
if ( pBeg1[i_] == pBeg2[k_] )
continue;
Fxch_DivFind( Vec_WecEntry( pFxchMan->vCubes, pBeg1[i_] ),
Vec_WecEntry( pFxchMan->vCubes, pBeg2[k_] ),
pFxchMan->vCubeFree );
if ( Vec_IntSize( pFxchMan->vCubeFree ) == 4 )
Fxch_DivNormalize( pFxchMan->vCubeFree );
if ( !Vec_IntEqual( pFxchMan->vDiv, pFxchMan->vCubeFree ) )
continue;
Vec_IntPush( pFxchMan->vPairs, pBeg1[i_] );
Vec_IntPush( pFxchMan->vPairs, pBeg2[k_] );
}
pBeg1 += i;
pBeg2 += k;
}
else if ( CubeId1 < CubeId2 )
pBeg1++;
else
pBeg2++;
}
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END

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/**CFile****************************************************************
FileName [ FxchMan.c ]
PackageName [ Fast eXtract with Cube Hashing (FXCH) ]
Synopsis [ Fxch Manager implementation ]
Author [ Bruno Schmitt - boschmitt at inf.ufrgs.br ]
Affiliation [ UFRGS ]
Date [ Ver. 1.0. Started - March 6, 2016. ]
Revision []
***********************************************************************/
#include "Fxch.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// LOCAL FUNCTIONS DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
static inline int Fxch_ManSCAddRemove( Fxch_Man_t* pFxchMan,
unsigned int SubCubeID,
unsigned int iSubCube,
unsigned int iCube,
unsigned int iLit0,
unsigned int iLit1,
char fAdd,
char fUpdate )
{
int ret = 0;
if ( fAdd )
{
ret = Fxch_SCHashTableInsert( pFxchMan->pSCHashTable, pFxchMan->vCubes,
SubCubeID, iSubCube,
iCube, iLit0, iLit1, fUpdate );
}
else
{
ret = Fxch_SCHashTableRemove( pFxchMan->pSCHashTable, pFxchMan->vCubes,
SubCubeID, iSubCube,
iCube, iLit0, iLit1, fUpdate );
}
return ret;
}
static inline int Fxch_ManDivSingleCube( Fxch_Man_t* pFxchMan,
int iCube,
int fAdd,
int fUpdate )
{
Vec_Int_t* vCube = Vec_WecEntry( pFxchMan->vCubes, iCube );
int i, k,
Lit0,
Lit1,
fSingleCube = 1,
fBase = 0;
if ( Vec_IntSize(vCube) < 2 )
return 0;
Vec_IntForEachEntryStart( vCube, Lit0, i, 1)
Vec_IntForEachEntryStart( vCube, Lit1, k, (i + 1) )
{
assert( Lit0 < Lit1 );
Vec_IntClear( pFxchMan->vCubeFree );
Vec_IntPush( pFxchMan->vCubeFree, Abc_Var2Lit( Abc_LitNot( Lit0 ), 0 ) );
Vec_IntPush( pFxchMan->vCubeFree, Abc_Var2Lit( Abc_LitNot( Lit1 ), 1 ) );
if (fAdd)
{
Fxch_DivAdd( pFxchMan, fUpdate, fSingleCube, fBase );
pFxchMan->nPairsS++;
}
else
{
Fxch_DivRemove( pFxchMan, fUpdate, fSingleCube, fBase );
pFxchMan->nPairsS--;
}
}
return Vec_IntSize( vCube ) * ( Vec_IntSize( vCube ) - 1 ) / 2;
}
static inline void Fxch_ManDivDoubleCube( Fxch_Man_t* pFxchMan,
int iCube,
int fAdd,
int fUpdate )
{
Vec_Int_t* vLitHashKeys = pFxchMan->vLitHashKeys,
* vCube = Vec_WecEntry( pFxchMan->vCubes, iCube );
int SubCubeID = 0,
nHashedSC = 0,
iLit0,
Lit0;
Vec_IntForEachEntryStart( vCube, Lit0, iLit0, 1)
SubCubeID += Vec_IntEntry( vLitHashKeys, Lit0 );
Fxch_ManSCAddRemove( pFxchMan,
SubCubeID, nHashedSC++,
iCube, 0, 0,
fAdd, fUpdate );
Vec_IntForEachEntryStart( vCube, Lit0, iLit0, 1)
{
/* 1 Lit remove */
SubCubeID -= Vec_IntEntry( vLitHashKeys, Lit0 );
pFxchMan->nPairsD += Fxch_ManSCAddRemove( pFxchMan,
SubCubeID, nHashedSC++,
iCube, iLit0, 0,
fAdd, fUpdate );
if ( Vec_IntSize( vCube ) > 3 )
{
int Lit1,
iLit1;
Vec_IntForEachEntryStart( vCube, Lit1, iLit1, iLit0 + 1)
{
/* 2 Lit remove */
SubCubeID -= Vec_IntEntry( vLitHashKeys, Lit1 );
pFxchMan->nPairsD += Fxch_ManSCAddRemove( pFxchMan,
SubCubeID, nHashedSC++,
iCube, iLit0, iLit1,
fAdd, fUpdate );
SubCubeID += Vec_IntEntry( vLitHashKeys, Lit1 );
}
}
SubCubeID += Vec_IntEntry( vLitHashKeys, Lit0 );
}
}
static inline void Fxch_ManCompressCubes( Vec_Wec_t* vCubes,
Vec_Int_t* vLit2Cube )
{
int i,
k = 0,
CubeId;
Vec_IntForEachEntry( vLit2Cube, CubeId, i )
if ( Vec_IntSize(Vec_WecEntry(vCubes, CubeId)) > 0 )
Vec_IntWriteEntry( vLit2Cube, k++, CubeId );
Vec_IntShrink( vLit2Cube, k );
}
////////////////////////////////////////////////////////////////////////
/// PUBLIC INTERFACE ///
////////////////////////////////////////////////////////////////////////
Fxch_Man_t* Fxch_ManAlloc( Vec_Wec_t* vCubes,
char SMode )
{
Fxch_Man_t* pFxchMan = ABC_CALLOC( Fxch_Man_t, 1 );
pFxchMan->vCubes = vCubes;
pFxchMan->pDivHash = Hsh_VecManStart( 1000 );
pFxchMan->vDivWeights = Vec_FltAlloc( 1000 );
pFxchMan->SMode = SMode;
if ( pFxchMan->SMode == 0 )
pFxchMan->vDivCubePairs = Vec_WecAlloc( 1000 );
pFxchMan->vCubeFree = Vec_IntAlloc( 100 );
pFxchMan->vDiv = Vec_IntAlloc( 100 );
pFxchMan->vCubesS = Vec_IntAlloc( 100 );
pFxchMan->vPairs = Vec_IntAlloc( 100 );
return pFxchMan;
}
void Fxch_ManFree( Fxch_Man_t* pFxchMan )
{
Vec_WecFree( pFxchMan->vLits );
Vec_IntFree( pFxchMan->vLitCount );
Vec_IntFree( pFxchMan->vLitHashKeys );
Hsh_VecManStop( pFxchMan->pDivHash );
Vec_FltFree( pFxchMan->vDivWeights );
Vec_QueFree( pFxchMan->vDivPrio );
if ( pFxchMan->SMode == 0 )
Vec_WecFree( pFxchMan->vDivCubePairs );
Vec_IntFree( pFxchMan->vLevels );
Vec_IntFree( pFxchMan->vCubeFree );
Vec_IntFree( pFxchMan->vDiv );
Vec_IntFree( pFxchMan->vCubesS );
Vec_IntFree( pFxchMan->vPairs );
ABC_FREE( pFxchMan );
}
void Fxch_ManMapLiteralsIntoCubes( Fxch_Man_t* pFxchMan,
int nVars )
{
Vec_Int_t* vCube;
int i, k,
Lit,
Count;
pFxchMan->nVars = 0;
pFxchMan->nLits = 0;
Vec_WecForEachLevel( pFxchMan->vCubes, vCube, i )
{
assert( Vec_IntSize(vCube) > 0 );
pFxchMan->nVars = Abc_MaxInt( pFxchMan->nVars, Vec_IntEntry( vCube, 0 ) );
pFxchMan->nLits += Vec_IntSize(vCube) - 1;
Vec_IntForEachEntryStart( vCube, Lit, k, 1 )
pFxchMan->nVars = Abc_MaxInt( pFxchMan->nVars, Abc_Lit2Var( Lit ) );
}
assert( pFxchMan->nVars < nVars );
pFxchMan->nVars = nVars;
/* Count the number of time each literal appears on the SOP */
pFxchMan->vLitCount = Vec_IntStart( 2 * pFxchMan->nVars );
Vec_WecForEachLevel( pFxchMan->vCubes, vCube, i )
Vec_IntForEachEntryStart( vCube, Lit, k, 1 )
Vec_IntAddToEntry( pFxchMan->vLitCount, Lit, 1 );
/* Allocate space to the array of arrays wich maps Literals into cubes which uses them */
pFxchMan->vLits = Vec_WecStart( 2 * pFxchMan->nVars );
Vec_IntForEachEntry( pFxchMan->vLitCount, Count, Lit )
Vec_IntGrow( Vec_WecEntry( pFxchMan->vLits, Lit ), Count );
/* Maps Literals into cubes which uses them */
Vec_WecForEachLevel( pFxchMan->vCubes, vCube, i )
Vec_IntForEachEntryStart( vCube, Lit, k, 1 )
Vec_WecPush( pFxchMan->vLits, Lit, i );
}
void Fxch_ManGenerateLitHashKeys( Fxch_Man_t* pFxchMan )
{
/* Generates the random number which will be used for hashing cubes */
Gia_ManRandom( 1 );
pFxchMan->vLitHashKeys = Vec_IntAlloc( ( 2 * pFxchMan->nVars ) );
for ( int i = 0; i < (2 * pFxchMan->nVars); i++ )
Vec_IntPush( pFxchMan->vLitHashKeys, Gia_ManRandom(0) & 0x3FFFFFF );
}
void Fxch_ManSCHashTablesInit( Fxch_Man_t* pFxchMan )
{
Vec_Wec_t* vCubes = pFxchMan->vCubes;
Vec_Int_t* vCube,
* vCubeLinks;
int iCube,
nTotalHashed = 0;
vCubeLinks = Vec_IntAlloc( Vec_WecSize( vCubes ) + 1 );
Vec_WecForEachLevel( vCubes, vCube, iCube )
{
int nLits = Vec_IntSize( vCube ) - 1,
nSubCubes = nLits == 2? nLits : ( nLits * nLits + nLits ) / 2;
Vec_IntPush( vCubeLinks, ( nTotalHashed + 1 ) );
nTotalHashed += nSubCubes + 1;
}
pFxchMan->pSCHashTable = Fxch_SCHashTableCreate( pFxchMan, vCubeLinks, nTotalHashed );
}
void Fxch_ManSCHashTablesFree( Fxch_Man_t* pFxchMan )
{
Fxch_SCHashTableDelete( pFxchMan->pSCHashTable );
}
void Fxch_ManDivCreate( Fxch_Man_t* pFxchMan )
{
Vec_Int_t* vCube;
float Weight;
int fAdd = 1,
fUpdate = 0,
iCube;
Vec_WecForEachLevel( pFxchMan->vCubes, vCube, iCube )
{
Fxch_ManDivSingleCube( pFxchMan, iCube, fAdd, fUpdate );
Fxch_ManDivDoubleCube( pFxchMan, iCube, fAdd, fUpdate );
}
pFxchMan->vDivPrio = Vec_QueAlloc( Vec_FltSize( pFxchMan->vDivWeights ) );
Vec_QueSetPriority( pFxchMan->vDivPrio, Vec_FltArrayP( pFxchMan->vDivWeights ) );
Vec_FltForEachEntry( pFxchMan->vDivWeights, Weight, iCube )
{
if ( Weight > 0.0 )
Vec_QuePush( pFxchMan->vDivPrio, iCube );
}
}
/* Level Computation */
int Fxch_ManComputeLevelDiv( Fxch_Man_t* pFxchMan,
Vec_Int_t* vCubeFree )
{
int i,
Lit,
Level = 0;
Vec_IntForEachEntry( vCubeFree, Lit, i )
Level = Abc_MaxInt( Level, Vec_IntEntry( pFxchMan->vLevels, Abc_Lit2Var( Abc_Lit2Var( Lit ) ) ) );
return Abc_MinInt( Level, 800 );
}
int Fxch_ManComputeLevelCube( Fxch_Man_t* pFxchMan,
Vec_Int_t * vCube )
{
int k,
Lit,
Level = 0;
Vec_IntForEachEntryStart( vCube, Lit, k, 1 )
Level = Abc_MaxInt( Level, Vec_IntEntry( pFxchMan->vLevels, Abc_Lit2Var( Lit ) ) );
return Level;
}
void Fxch_ManComputeLevel( Fxch_Man_t* pFxchMan )
{
Vec_Int_t* vCube;
int i,
iVar,
iFirst = 0;
iVar = Vec_IntEntry( Vec_WecEntry( pFxchMan->vCubes, 0 ), 0 );
pFxchMan->vLevels = Vec_IntStart( pFxchMan->nVars );
Vec_WecForEachLevel( pFxchMan->vCubes, vCube, i )
{
if ( iVar != Vec_IntEntry( vCube, 0 ) )
{
Vec_IntAddToEntry( pFxchMan->vLevels, iVar, i - iFirst );
iVar = Vec_IntEntry( vCube, 0 );
iFirst = i;
}
Vec_IntUpdateEntry( pFxchMan->vLevels, iVar, Fxch_ManComputeLevelCube( pFxchMan, vCube ) );
}
}
void Fxch_ManUpdate( Fxch_Man_t* pFxchMan,
int iDiv )
{
int i,
iCube0,
iCube1,
Lit0 = -1,
Lit1 = -1;
Vec_Int_t* vCube0,
* vCube1,
* vLitP,
* vLitN,
* vDivCubePairs;
/* Get the selected candidate (divisor) */
Vec_IntClear( pFxchMan->vDiv );
Vec_IntAppend( pFxchMan->vDiv, Hsh_VecReadEntry( pFxchMan->pDivHash, iDiv ) );
/* Find cubes associated with the single divisor */
Vec_IntClear( pFxchMan->vCubesS );
if ( Vec_IntSize( pFxchMan->vDiv ) == 2 )
{
Lit0 = Abc_Lit2Var( Vec_IntEntry( pFxchMan->vDiv, 0 ) );
Lit1 = Abc_Lit2Var( Vec_IntEntry( pFxchMan->vDiv, 1 ) );
Fxch_ManCompressCubes( pFxchMan->vCubes, Vec_WecEntry( pFxchMan->vLits, Abc_LitNot( Lit0 ) ) );
Fxch_ManCompressCubes( pFxchMan->vCubes, Vec_WecEntry( pFxchMan->vLits, Abc_LitNot( Lit1 ) ) );
Vec_IntTwoRemoveCommon( Vec_WecEntry( pFxchMan->vLits, Abc_LitNot( Lit0 ) ),
Vec_WecEntry( pFxchMan->vLits, Abc_LitNot( Lit1 ) ),
pFxchMan->vCubesS );
}
else
Fxch_DivFindPivots( pFxchMan->vDiv, &Lit0, &Lit1 );
assert( Lit0 >= 0 && Lit1 >= 0 );
/* Find pairs associated with the divisor */
Vec_IntClear( pFxchMan->vPairs );
if ( pFxchMan->SMode == 1 )
{
Fxch_ManCompressCubes( pFxchMan->vCubes, Vec_WecEntry(pFxchMan->vLits, Lit0) );
Fxch_ManCompressCubes( pFxchMan->vCubes, Vec_WecEntry(pFxchMan->vLits, Lit1) );
Fxch_DivFindCubePairs( pFxchMan, Vec_WecEntry( pFxchMan->vLits, Lit0 ), Vec_WecEntry( pFxchMan->vLits, Lit1 ) );
}
else
{
vDivCubePairs = Vec_WecEntry( pFxchMan->vDivCubePairs, iDiv );
Vec_IntAppend( pFxchMan->vPairs, vDivCubePairs );
Vec_IntErase( vDivCubePairs );
}
Vec_IntForEachEntryDouble( pFxchMan->vPairs, iCube0, iCube1, i )
{
assert( Fxch_ManGetLit( pFxchMan, iCube0, 0) == Fxch_ManGetLit( pFxchMan, iCube1, 0) );
if (iCube0 > iCube1)
{
Vec_IntSetEntry( pFxchMan->vPairs, i, iCube1);
Vec_IntSetEntry( pFxchMan->vPairs, i+1, iCube0);
}
}
Vec_IntUniqifyPairs( pFxchMan->vPairs );
assert( Vec_IntSize( pFxchMan->vPairs ) % 2 == 0 );
/* subtract cost of single-cube divisors */
Vec_IntForEachEntry( pFxchMan->vCubesS, iCube0, i )
Fxch_ManDivSingleCube( pFxchMan, iCube0, 0, 1); /* remove (fAdd = 0) - fUpdate = 1 */
Vec_IntForEachEntryDouble( pFxchMan->vPairs, iCube0, iCube1, i )
Fxch_ManDivSingleCube( pFxchMan, iCube0, 0, 1), /* remove (fAdd = 0) - fUpdate = 1 */
Fxch_ManDivSingleCube( pFxchMan, iCube1, 0, 1); /* remove (fAdd = 0) - fUpdate = 1 */
/* subtract cost of double-cube divisors */
Vec_IntForEachEntry( pFxchMan->vCubesS, iCube0, i )
{
if ( iCube0 < Vec_IntSize(pFxchMan->pSCHashTable->vCubeLinks) )
Fxch_ManDivDoubleCube( pFxchMan, iCube0, 0, 1 ); /* remove (fAdd = 0) - fUpdate = 1 */
}
Vec_IntForEachEntry( pFxchMan->vPairs, iCube0, i )
{
if ( iCube0 < Vec_IntSize(pFxchMan->pSCHashTable->vCubeLinks) )
Fxch_ManDivDoubleCube( pFxchMan, iCube0, 0, 1 ); /* remove (fAdd = 0) - fUpdate = 1 */
}
/* Create a new variable */
int iVarNew = pFxchMan->nVars;
pFxchMan->nVars++;
/* Create new Lit hash keys */
Vec_IntPush( pFxchMan->vLitHashKeys, Gia_ManRandom(0) & 0x3FFFFFF );
Vec_IntPush( pFxchMan->vLitHashKeys, Gia_ManRandom(0) & 0x3FFFFFF );
/* Create new Cube */
vCube0 = Vec_WecPushLevel( pFxchMan->vCubes );
Vec_IntPush( vCube0, iVarNew );
int Level;
if ( Vec_IntSize( pFxchMan->vDiv ) == 2 )
{
if ( Lit0 > Lit1 )
ABC_SWAP(int, Lit0, Lit1);
Vec_IntPush( vCube0, Abc_LitNot( Lit0 ) );
Vec_IntPush( vCube0, Abc_LitNot( Lit1 ) );
Level = 1 + Fxch_ManComputeLevelCube( pFxchMan, vCube0 );
}
else
{
vCube1 = Vec_WecPushLevel( pFxchMan->vCubes );
vCube0 = Fxch_ManGetCube( pFxchMan, Vec_WecSize( pFxchMan->vCubes ) - 2 );
Vec_IntPush( vCube1, iVarNew );
Fxch_DivSepareteCubes( pFxchMan->vDiv, vCube0, vCube1 );
Level = 2 + Abc_MaxInt( Fxch_ManComputeLevelCube( pFxchMan, vCube0 ),
Fxch_ManComputeLevelCube( pFxchMan, vCube1 ) );
}
assert( Vec_IntSize( pFxchMan->vLevels ) == iVarNew );
Vec_IntPush( pFxchMan->vLevels, Level );
pFxchMan->nLits += Vec_IntSize( pFxchMan->vDiv );
/* Create new literals */
vLitP = Vec_WecPushLevel( pFxchMan->vLits );
vLitN = Vec_WecPushLevel( pFxchMan->vLits );
vLitP = Vec_WecEntry( pFxchMan->vLits, Vec_WecSize( pFxchMan->vLits ) - 2 );
/* Extract divisor from single-cubes */
Vec_IntForEachEntry( pFxchMan->vCubesS, iCube0, i )
{
int RetValue;
vCube0 = Fxch_ManGetCube( pFxchMan, iCube0 );
RetValue = Vec_IntRemove1( vCube0, Abc_LitNot( Lit0 ) );
RetValue += Vec_IntRemove1( vCube0, Abc_LitNot( Lit1 ) );
assert( RetValue == 2 );
Vec_IntPush( vCube0, Abc_Var2Lit( iVarNew, 0 ) );
Vec_IntPush( vLitP, Vec_WecLevelId( pFxchMan->vCubes, vCube0 ) );
pFxchMan->nLits--;
}
/* For each pair (Ci, Cj) */
/* Extract divisor from cube pairs */
int k = 0,
nCompls = 0;
Vec_IntForEachEntryDouble( pFxchMan->vPairs, iCube0, iCube1, i )
{
int RetValue, fCompl = 0;
vCube0 = Fxch_ManGetCube( pFxchMan, iCube0 );
vCube1 = Fxch_ManGetCube( pFxchMan, iCube1 );
RetValue = Fxch_DivRemoveLits( vCube0, vCube1, pFxchMan->vDiv, &fCompl );
nCompls += fCompl;
assert( RetValue == Vec_IntSize( pFxchMan->vDiv ) );
if ( Vec_IntSize( pFxchMan->vDiv ) == 2 || fCompl )
{
Vec_IntPush( vCube0, Abc_Var2Lit( iVarNew, 1 ) );
Vec_IntPush( vLitN, Vec_WecLevelId( pFxchMan->vCubes, vCube0 ) );
}
else
{
Vec_IntPush( vCube0, Abc_Var2Lit( iVarNew, 0 ) );
Vec_IntPush( vLitP, Vec_WecLevelId( pFxchMan->vCubes, vCube0 ) );
}
pFxchMan->nLits -= Vec_IntSize( pFxchMan->vDiv ) + Vec_IntSize( vCube1 ) - 2;
/* Remove second cube */
Vec_IntClear( vCube1 );
Vec_IntWriteEntry( pFxchMan->vPairs, k++, Vec_WecLevelId( pFxchMan->vCubes, vCube0 ) );
}
assert( k == Vec_IntSize( pFxchMan->vPairs ) / 2 );
Vec_IntShrink( pFxchMan->vPairs, k );
/* Add cost of single-cube divisors */
Vec_IntForEachEntry( pFxchMan->vCubesS, iCube0, i )
Fxch_ManDivSingleCube( pFxchMan, iCube0, 1, 1 ); /* fAdd = 1 - fUpdate = 1 */
Vec_IntForEachEntry( pFxchMan->vPairs, iCube0, i )
Fxch_ManDivSingleCube( pFxchMan, iCube0, 1, 1 ); /* fAdd = 1 - fUpdate = 1 */
/* Add cost of double-cube divisors */
Vec_IntForEachEntry( pFxchMan->vCubesS, iCube0, i )
if ( iCube0 < Vec_IntSize(pFxchMan->pSCHashTable->vCubeLinks) )
Fxch_ManDivDoubleCube( pFxchMan, iCube0, 1, 1 ); /* fAdd = 1 - fUpdate = 1 */
Vec_IntForEachEntry( pFxchMan->vPairs, iCube0, i )
if ( iCube0 < Vec_IntSize(pFxchMan->pSCHashTable->vCubeLinks) )
Fxch_ManDivDoubleCube( pFxchMan, iCube0, 1, 1 ); /* fAdd = 1 - fUpdate = 1 */
/* If it's a double-cube devisor add its cost */
if ( Vec_IntSize( pFxchMan->vDiv ) > 2 )
{
iCube0 = Vec_WecSize( pFxchMan->vCubes ) - 2;
iCube1 = Vec_WecSize( pFxchMan->vCubes ) - 1;
Fxch_ManDivSingleCube( pFxchMan, iCube0, 1, 1 ); /* fAdd = 1 - fUpdate = 1 */
Fxch_ManDivSingleCube( pFxchMan, iCube1, 1, 1 ); /* fAdd = 1 - fUpdate = 1 */
vCube0 = Vec_WecEntry( pFxchMan->vCubes, iCube0 );
Vec_IntForEachEntryStart( vCube0, Lit0, i, 1 )
Vec_WecPush( pFxchMan->vLits, Lit0, Vec_WecLevelId( pFxchMan->vCubes, vCube0 ) );
vCube1 = Vec_WecEntry( pFxchMan->vCubes, iCube1 );
Vec_IntForEachEntryStart( vCube1, Lit0, i, 1 )
Vec_WecPush( pFxchMan->vLits, Lit0, Vec_WecLevelId( pFxchMan->vCubes, vCube1 ) );
}
/* remove these cubes from the lit array of the divisor */
Vec_IntForEachEntry( pFxchMan->vDiv, Lit0, i )
{
Vec_IntTwoRemove( Vec_WecEntry( pFxchMan->vLits, Abc_Lit2Var( Lit0 ) ), pFxchMan->vPairs );
Vec_IntTwoRemove( Vec_WecEntry( pFxchMan->vLits, Abc_LitNot( Abc_Lit2Var( Lit0 ) ) ), pFxchMan->vPairs );
}
pFxchMan->nExtDivs++;
}
/* Print */
void Fxch_ManPrintDivs( Fxch_Man_t* pFxchMan )
{
int iDiv;
for ( iDiv = 0; iDiv < Vec_FltSize( pFxchMan->vDivWeights ); iDiv++ )
Fxch_DivPrint( pFxchMan, iDiv );
}
void Fxch_ManPrintStats( Fxch_Man_t* pFxchMan )
{
printf( "[FXCH] ");
printf( "Cubes =%8d ", Vec_WecSizeUsed( pFxchMan->vCubes ) );
printf( "Lits =%8d ", Vec_WecSizeUsed( pFxchMan->vLits ) );
printf( "Divs =%8d ", Hsh_VecSize( pFxchMan->pDivHash ) );
printf( "Divs+ =%8d ", Vec_QueSize( pFxchMan->vDivPrio ) );
printf( "Extr =%7d \n", pFxchMan->nExtDivs );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END

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src/opt/fxch/FxchSCHashTable.c Normal file
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/**CFile****************************************************************
FileName [ FxchSCHashTable.c ]
PackageName [ Fast eXtract with Cube Hashing (FXCH) ]
Synopsis [ Sub-cubes hash table implementation ]
Author [ Bruno Schmitt - boschmitt at inf.ufrgs.br ]
Affiliation [ UFRGS ]
Date [ Ver. 1.0. Started - March 6, 2016. ]
Revision []
***********************************************************************/
#include "Fxch.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
static inline void MurmurHash3_x86_32 ( const void* key,
int len,
uint32_t seed,
void* out )
{
const uint8_t* data = (const uint8_t*)key;
const int nblocks = len / 4;
uint32_t h1 = seed;
const uint32_t c1 = 0xcc9e2d51;
const uint32_t c2 = 0x1b873593;
//----------
// body
const uint32_t * blocks = (const uint32_t *)(data + nblocks*4);
for(int i = -nblocks; i; i++)
{
uint32_t k1 = blocks[i];
k1 *= c1;
k1 = (k1 << 15) | (k1 >> (32 - 15));
k1 *= c2;
h1 ^= k1;
h1 = (h1 << 13) | (h1 >> (32 - 13));
h1 = h1*5+0xe6546b64;
}
//----------
// tail
const uint8_t * tail = (const uint8_t*)(data + nblocks*4);
uint32_t k1 = 0;
switch(len & 3)
{
case 3: k1 ^= tail[2] << 16;
case 2: k1 ^= tail[1] << 8;
case 1: k1 ^= tail[0];
k1 *= c1; k1 = (k1 << 15) | (k1 >> (32 - 15)); k1 *= c2; h1 ^= k1;
};
//----------
// finalization
h1 ^= len;
h1 ^= h1 >> 16;
h1 *= 0x85ebca6b;
h1 ^= h1 >> 13;
h1 *= 0xc2b2ae35;
h1 ^= h1 >> 16;
*(uint32_t*)out = h1;
}
Fxch_SCHashTable_t* Fxch_SCHashTableCreate( Fxch_Man_t* pFxchMan,
Vec_Int_t* vCubeLinks,
int nEntries )
{
Fxch_SCHashTable_t* pSCHashTable = ABC_CALLOC( Fxch_SCHashTable_t, 1 );
int nBits = Abc_Base2Log( nEntries + 1 ) + 1;
pSCHashTable->pFxchMan = pFxchMan;
pSCHashTable->SizeMask = (1 << nBits) - 1;
pSCHashTable->vCubeLinks = vCubeLinks;
pSCHashTable->pBins = ABC_CALLOC( Fxch_SCHashTable_Entry_t, pSCHashTable->SizeMask + 1 );
return pSCHashTable;
}
void Fxch_SCHashTableDelete( Fxch_SCHashTable_t* pSCHashTable )
{
Vec_IntFree( pSCHashTable->vCubeLinks );
Vec_IntErase( &pSCHashTable->vSubCube0 );
Vec_IntErase( &pSCHashTable->vSubCube1 );
ABC_FREE( pSCHashTable->pBins );
ABC_FREE( pSCHashTable );
}
static inline Fxch_SCHashTable_Entry_t* Fxch_SCHashTableBin( Fxch_SCHashTable_t* pSCHashTable,
unsigned int SubCubeID )
{
return pSCHashTable->pBins + (SubCubeID & pSCHashTable->SizeMask);
}
static inline Fxch_SCHashTable_Entry_t* Fxch_SCHashTableEntry( Fxch_SCHashTable_t* pSCHashTable,
unsigned int iEntry )
{
if ( ( iEntry > 0 ) && ( iEntry < ( pSCHashTable->SizeMask + 1 ) ) )
return pSCHashTable->pBins + iEntry;
return NULL;
}
static inline void Fxch_SCHashTableInsertLink( Fxch_SCHashTable_t* pSCHashTable,
unsigned int iEntry0,
unsigned int iEntry1 )
{
Fxch_SCHashTable_Entry_t* pEntry0 = Fxch_SCHashTableEntry( pSCHashTable, iEntry0 ),
* pEntry1 = Fxch_SCHashTableEntry( pSCHashTable, iEntry1 ),
* pEntry0Next = Fxch_SCHashTableEntry( pSCHashTable, pEntry0->iNext );
assert( pEntry0Next->iPrev == iEntry0 );
pEntry1->iNext = pEntry0->iNext;
pEntry0->iNext = iEntry1;
pEntry1->iPrev = iEntry0;
pEntry0Next->iPrev = iEntry1;
}
static inline void Fxch_SCHashTableRemoveLink( Fxch_SCHashTable_t* pSCHashTable,
int iEntry0,
int iEntry1 )
{
Fxch_SCHashTable_Entry_t* pEntry0 = Fxch_SCHashTableEntry( pSCHashTable, iEntry0 ),
* pEntry1 = Fxch_SCHashTableEntry( pSCHashTable, iEntry1 ),
* pEntry1Next = Fxch_SCHashTableEntry( pSCHashTable, pEntry1->iNext );
assert( pEntry0->iNext == iEntry1 );
assert( pEntry1->iPrev == iEntry0 );
assert( pEntry1Next->iPrev == iEntry1 );
pEntry0->iNext = pEntry1->iNext;
pEntry1->iNext = 0;
pEntry1Next->iPrev = pEntry1->iPrev;
pEntry1->iPrev = 0;
}
static inline int Fxch_SCHashTableEntryCompare( Fxch_SCHashTable_t* pSCHashTable,
Vec_Wec_t* vCubes,
Fxch_SubCube_t* pSCData0,
Fxch_SubCube_t* pSCData1 )
{
Vec_Int_t* vCube0 = Vec_WecEntry( vCubes, pSCData0->iCube ),
* vCube1 = Vec_WecEntry( vCubes, pSCData1->iCube );
if ( !Vec_IntSize( vCube0 ) ||
!Vec_IntSize( vCube1 ) ||
Vec_IntEntry( vCube0, 0 ) != Vec_IntEntry( vCube1, 0 ) ||
pSCData0->Id != pSCData1->Id )
return 0;
Vec_IntClear( &pSCHashTable->vSubCube0 );
Vec_IntClear( &pSCHashTable->vSubCube1 );
if ( pSCData0->iLit1 == 0 && pSCData1->iLit1 == 0 &&
Vec_IntEntry( vCube0, pSCData0->iLit0 ) == Abc_LitNot( Vec_IntEntry( vCube1, pSCData1->iLit0 ) ) )
return 0;
if ( pSCData0->iLit1 > 0 && pSCData1->iLit1 > 0 &&
( Vec_IntEntry( vCube0, pSCData0->iLit0 ) == Vec_IntEntry( vCube1, pSCData1->iLit0 ) ||
Vec_IntEntry( vCube0, pSCData0->iLit0 ) == Vec_IntEntry( vCube1, pSCData1->iLit1 ) ||
Vec_IntEntry( vCube0, pSCData0->iLit1 ) == Vec_IntEntry( vCube1, pSCData1->iLit0 ) ||
Vec_IntEntry( vCube0, pSCData0->iLit1 ) == Vec_IntEntry( vCube1, pSCData1->iLit1 ) ) )
return 0;
if ( pSCData0->iLit0 > 0 )
Vec_IntAppendSkip( &pSCHashTable->vSubCube0, vCube0, pSCData0->iLit0 );
else
Vec_IntAppend( &pSCHashTable->vSubCube0, vCube0 );
if ( pSCData1->iLit0 > 0 )
Vec_IntAppendSkip( &pSCHashTable->vSubCube1, vCube1, pSCData1->iLit0 );
else
Vec_IntAppend( &pSCHashTable->vSubCube1, vCube1 );
if ( pSCData0->iLit1 > 0)
Vec_IntDrop( &pSCHashTable->vSubCube0,
pSCData0->iLit0 < pSCData0->iLit1 ? pSCData0->iLit1 - 1 : pSCData0->iLit1 );
if ( pSCData1->iLit1 > 0 )
Vec_IntDrop( &pSCHashTable->vSubCube1,
pSCData1->iLit0 < pSCData1->iLit1 ? pSCData1->iLit1 - 1 : pSCData1->iLit1 );
Vec_IntDrop( &pSCHashTable->vSubCube0, 0 );
Vec_IntDrop( &pSCHashTable->vSubCube1, 0 );
return Vec_IntEqual( &pSCHashTable->vSubCube0, &pSCHashTable->vSubCube1 );
}
int Fxch_SCHashTableInsert( Fxch_SCHashTable_t* pSCHashTable,
Vec_Wec_t* vCubes,
unsigned int SubCubeID,
unsigned int iSubCube,
unsigned int iCube,
unsigned int iLit0,
unsigned int iLit1,
char fUpdate )
{
unsigned int BinID;
MurmurHash3_x86_32( ( void* ) &SubCubeID, sizeof( int ), 0x9747b28c, &BinID);
unsigned int iNewEntry = ( unsigned int )( Vec_IntEntry( pSCHashTable->vCubeLinks, iCube ) ) + iSubCube;
Fxch_SCHashTable_Entry_t* pBin = Fxch_SCHashTableBin( pSCHashTable, BinID ),
* pNewEntry = Fxch_SCHashTableEntry( pSCHashTable, iNewEntry );
assert( pNewEntry->Used == 0 );
pNewEntry->SCData.Id = SubCubeID;
pNewEntry->SCData.iCube = iCube;
pNewEntry->SCData.iLit0 = iLit0;
pNewEntry->SCData.iLit1 = iLit1;
pNewEntry->Used = 1;
pSCHashTable->nEntries++;
if ( pBin->iTable == 0 )
{
pBin->iTable = iNewEntry;
pNewEntry->iNext = iNewEntry;
pNewEntry->iPrev = iNewEntry;
return 0;
}
Fxch_SCHashTable_Entry_t* pEntry;
unsigned int iEntry;
char Pairs = 0,
fStart = 1;
for ( iEntry = pBin->iTable; iEntry != pBin->iTable || fStart; iEntry = pEntry->iNext, fStart = 0 )
{
pEntry = Fxch_SCHashTableBin( pSCHashTable, iEntry );
if ( !Fxch_SCHashTableEntryCompare( pSCHashTable, vCubes, &( pEntry->SCData ), &( pNewEntry->SCData ) ) )
continue;
if ( pEntry->SCData.iLit0 == 0 )
{
printf("[FXCH] SCC detected\n");
continue;
}
if ( pNewEntry->SCData.iLit0 == 0 )
{
printf("[FXCH] SCC detected\n");
continue;
}
int Base;
if ( pEntry->SCData.iCube < pNewEntry->SCData.iCube )
Base = Fxch_DivCreate( pSCHashTable->pFxchMan, &( pEntry->SCData ), &( pNewEntry->SCData ) );
else
Base = Fxch_DivCreate( pSCHashTable->pFxchMan, &( pNewEntry->SCData ), &( pEntry->SCData ) );
if ( Base < 0 )
continue;
int iNewDiv = Fxch_DivAdd( pSCHashTable->pFxchMan, fUpdate, 0, Base );
if ( pSCHashTable->pFxchMan->SMode == 0 )
{
Vec_WecPush( pSCHashTable->pFxchMan->vDivCubePairs, iNewDiv, pEntry->SCData.iCube );
Vec_WecPush( pSCHashTable->pFxchMan->vDivCubePairs, iNewDiv, pNewEntry->SCData.iCube );
}
Pairs++;
}
assert( iEntry == (unsigned int)( pBin->iTable ) );
pEntry = Fxch_SCHashTableBin( pSCHashTable, iEntry );
Fxch_SCHashTableInsertLink( pSCHashTable, pEntry->iPrev, iNewEntry );
return Pairs;
}
int Fxch_SCHashTableRemove( Fxch_SCHashTable_t* pSCHashTable,
Vec_Wec_t* vCubes,
unsigned int SubCubeID,
unsigned int iSubCube,
unsigned int iCube,
unsigned int iLit0,
unsigned int iLit1,
char fUpdate )
{
unsigned int BinID;
MurmurHash3_x86_32( ( void* ) &SubCubeID, sizeof( int ), 0x9747b28c, &BinID);
unsigned int iEntry = ( unsigned int )( Vec_IntEntry( pSCHashTable->vCubeLinks, iCube ) ) + iSubCube;
Fxch_SCHashTable_Entry_t* pBin = Fxch_SCHashTableBin( pSCHashTable, BinID ),
* pEntry = Fxch_SCHashTableEntry( pSCHashTable, iEntry );
assert( pEntry->Used == 1 );
assert( pEntry->SCData.iCube == iCube );
if ( pEntry->iNext == iEntry )
{
assert( pEntry->iPrev == iEntry );
pBin->iTable = 0;
pEntry->iNext = 0;
pEntry->iPrev = 0;
pEntry->Used = 0;
return 0;
}
Fxch_SCHashTable_Entry_t* pNextEntry;
int iNextEntry,
Pairs = 0,
fStart = 1;
for ( iNextEntry = pEntry->iNext; iNextEntry != iEntry; iNextEntry = pNextEntry->iNext, fStart = 0 )
{
pNextEntry = Fxch_SCHashTableBin( pSCHashTable, iNextEntry );
if ( !Fxch_SCHashTableEntryCompare( pSCHashTable, vCubes, &( pEntry->SCData ), &( pNextEntry->SCData ) )
|| pEntry->SCData.iLit0 == 0
|| pNextEntry->SCData.iLit0 == 0 )
continue;
int Base;
if ( pNextEntry->SCData.iCube < pEntry->SCData.iCube )
Base = Fxch_DivCreate( pSCHashTable->pFxchMan, &( pNextEntry->SCData ), &( pEntry->SCData ) );
else
Base = Fxch_DivCreate( pSCHashTable->pFxchMan, &( pEntry->SCData ), &( pNextEntry->SCData ) );
if ( Base < 0 )
continue;
int iDiv = Fxch_DivRemove( pSCHashTable->pFxchMan, fUpdate, 0, Base );
if ( pSCHashTable->pFxchMan->SMode == 0 )
{
int i,
iCube0,
iCube1;
Vec_Int_t* vDivCubePairs = Vec_WecEntry( pSCHashTable->pFxchMan->vDivCubePairs, iDiv );
Vec_IntForEachEntryDouble( vDivCubePairs, iCube0, iCube1, i )
if ( ( iCube0 == pNextEntry->SCData.iCube && iCube1 == pEntry->SCData.iCube ) ||
( iCube0 == pEntry->SCData.iCube && iCube1 == pNextEntry->SCData.iCube ) )
{
Vec_IntDrop( vDivCubePairs, i+1 );
Vec_IntDrop( vDivCubePairs, i );
}
if ( Vec_IntSize( vDivCubePairs ) == 0 )
Vec_IntErase( vDivCubePairs );
}
Pairs++;
}
if ( pBin->iTable == iEntry )
pBin->iTable = ( pEntry->iNext != iEntry ) ? pEntry->iNext : 0;
pEntry->Used = 0;
Fxch_SCHashTableRemoveLink( pSCHashTable, pEntry->iPrev, iEntry );
return Pairs;
}
unsigned int Fxch_SCHashTableMemory( Fxch_SCHashTable_t* pHashTable )
{
unsigned int Memory = sizeof ( Fxch_SCHashTable_t );
Memory += Vec_IntMemory( pHashTable->vCubeLinks );
Memory += sizeof( Fxch_SubCube_t ) * ( pHashTable->SizeMask + 1 );
return Memory;
}
void Fxch_SCHashTablePrint( Fxch_SCHashTable_t* pHashTable )
{
printf( "SubCube Hash Table at %p\n", ( void* )pHashTable );
printf("%20s %20s\n", "nEntries",
"Memory Usage (MB)" );
int Memory = Fxch_SCHashTableMemory( pHashTable );
printf("%20d %18.2f\n", pHashTable->nEntries,
( ( double ) Memory / 1048576 ) );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END

4
src/opt/fxch/module.make Normal file
View File

@ -0,0 +1,4 @@
SRC += src/opt/fxch/Fxch.c \
src/opt/fxch/FxchDiv.c \
src/opt/fxch/FxchMan.c \
src/opt/fxch/FxchSCHashTable.c \