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Commit 657f2acd by Alan Mishchenko
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Changes to the matching procedure.

parent 9daabedf
Showing with 307 additions and 62 deletions
src/map/if/if.h
......@@ -192,12 +192,10 @@ struct If_Man_t_
Tim_Man_t * pManTim;
Vec_Int_t * vCoAttrs; // CO attributes 0=optimize; 1=keep; 2=relax
// hash table for functions
int nTableSize; // hash table size
int nTableEntries; // hash table entries
void ** pHashTable; // hash table bins
int nTableSize[2]; // hash table size
int nTableEntries[2]; // hash table entries
void ** pHashTable[2]; // hash table bins
Mem_Fixed_t * pMemEntries; // memory manager for hash table entries
// statistics
// int timeTruth;
};
......
src/map/if/ifDec16.c
......@@ -29,7 +29,8 @@ ABC_NAMESPACE_IMPL_START
#define CLU_VAR_MAX 16
#define CLU_WRD_MAX (1 << ((CLU_VAR_MAX)-6))
#define CLU_UNUSED 99
#define CLU_MEM_MAX 1000 // 1 Gb
#define CLU_UNUSED 0xff
// decomposition
typedef struct If_Grp_t_ If_Grp_t;
......@@ -45,7 +46,8 @@ typedef struct If_Hte_t_ If_Hte_t;
struct If_Hte_t_
{
If_Hte_t * pNext;
If_Grp_t Group;
unsigned Group;
unsigned Counter;
word pTruth[1];
};
......@@ -82,11 +84,30 @@ static word TruthAll[CLU_VAR_MAX][CLU_WRD_MAX] = {{0}};
extern void Kit_DsdPrintFromTruth( unsigned * pTruth, int nVars );
extern void Extra_PrintBinary( FILE * pFile, unsigned Sign[], int nBits );
extern int If_CluSupportSize( word * t, int nVars );
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
static inline unsigned If_CluGrp2Uns( If_Grp_t * pG )
{
char * pChar = (char *)pG;
unsigned Res = 0;
int i;
for ( i = 0; i < 8; i++ )
Res |= ((pChar[i] & 15) << (i << 2));
return Res;
}
static inline void If_CluUns2Grp( unsigned Group, If_Grp_t * pG )
{
char * pChar = (char *)pG;
int i;
for ( i = 0; i < 8; i++ )
pChar[i] = ((Group >> (i << 2)) & 15);
}
unsigned int If_CluPrimeCudd( unsigned int p )
{
int i,pn;
......@@ -126,60 +147,187 @@ static inline int If_CluCountOnes( word t )
t = (t & 0x0000FFFF0000FFFF) + ((t>>16) & 0x0000FFFF0000FFFF);
return (t & 0x00000000FFFFFFFF) + (t>>32);
}
void If_CluHashTableCheck( If_Man_t * p )
{
int t = 1;
If_Hte_t * pEntry;
int i, RetValue, Status;
for ( i = 0; i < p->nTableSize[t]; i++ )
{
for ( pEntry = ((If_Hte_t **)p->pHashTable[t])[i]; pEntry; pEntry = pEntry->pNext )
{
Status = ((pEntry->Group & 15) > 0);
RetValue = If_CutPerformCheck16( NULL, (unsigned *)pEntry->pTruth, 13, If_CluSupportSize(pEntry->pTruth, 13), "555" );
if ( RetValue != Status )
{
Kit_DsdPrintFromTruth( (unsigned*)pEntry->pTruth, 13 ); printf( "\n" );
RetValue = If_CutPerformCheck16( NULL, (unsigned *)pEntry->pTruth, 13, If_CluSupportSize(pEntry->pTruth, 13), "555" );
printf( "Hash table problem!!!\n" );
}
}
}
}
void If_CluHashPrintStats( If_Man_t * p, int t )
{
If_Hte_t * pEntry;
int i, Counter;
for ( i = 0; i < p->nTableSize[t]; i++ )
{
Counter = 0;
for ( pEntry = ((If_Hte_t **)p->pHashTable[t])[i]; pEntry; pEntry = pEntry->pNext )
Counter++;
if ( Counter == 0 )
continue;
if ( Counter < 10 )
continue;
printf( "%d=%d ", i, Counter );
}
}
int If_CluHashFindMedian( If_Man_t * p, int t )
{
If_Hte_t * pEntry;
Vec_Int_t * vCounters;
int i, Max = 0, Total = 0, Half = 0;
vCounters = Vec_IntStart( 1000 );
for ( i = 0; i < p->nTableSize[t]; i++ )
{
for ( pEntry = ((If_Hte_t **)p->pHashTable[t])[i]; pEntry; pEntry = pEntry->pNext )
{
if ( Max < (int)pEntry->Counter )
{
Max = pEntry->Counter;
Vec_IntSetEntry( vCounters, pEntry->Counter, 0 );
}
Vec_IntAddToEntry( vCounters, pEntry->Counter, 1 );
Total++;
}
}
for ( i = Max; i > 0; i-- )
{
Half += Vec_IntEntry( vCounters, i );
if ( Half > Total/2 )
break;
}
/*
printf( "total = %d ", Total );
printf( "half = %d ", Half );
printf( "i = %d ", i );
printf( "Max = %d.\n", Max );
*/
Vec_IntFree( vCounters );
return Abc_MaxInt( i, 1 );
}
int If_CluHashKey( word * pTruth, int nWords, int Size )
{
static unsigned BigPrimes[8] = {12582917, 25165843, 50331653, 100663319, 201326611, 402653189, 805306457, 1610612741};
unsigned char * s = (unsigned char *)pTruth;
unsigned Value = 0;
int i;
if ( nWords < 4 )
{
unsigned char * s = (unsigned char *)pTruth;
for ( i = 0; i < 8 * nWords; i++ )
Value ^= BigPrimes[i % 7] * s[i];
}
else
{
unsigned * s = (unsigned *)pTruth;
for ( i = 0; i < 2 * nWords; i++ )
Value ^= BigPrimes[i % 7] * s[i];
}
return Value % Size;
}
If_Grp_t * If_CluHashLookup( If_Man_t * p, word * pTruth )
unsigned * If_CluHashLookup( If_Man_t * p, word * pTruth, int t )
{
If_Hte_t * pEntry;
If_Hte_t * pEntry, * pPrev;
int nWords, HashKey;
if ( p == NULL )
return NULL;
nWords = If_CluWordNum(p->pPars->nLutSize);
if ( p->pMemEntries == NULL )
{
p->pMemEntries = Mem_FixedStart( sizeof(If_Hte_t) + sizeof(word) * (If_CluWordNum(p->pPars->nLutSize) - 1) );
p->nTableSize = If_CluPrimeCudd( Vec_PtrSize(p->vObjs) * p->pPars->nCutsMax * 2 );
p->pHashTable = ABC_CALLOC( void *, p->nTableSize );
if ( p->pHashTable[t] == NULL )
{
// decide how large should be the table
int nEntriesMax1 = 4 * If_CluPrimeCudd( Vec_PtrSize(p->vObjs) * p->pPars->nCutsMax );
int nEntriesMax2 = (int)(((double)CLU_MEM_MAX * (1 << 20)) / If_CluWordNum(p->pPars->nLutSize) / 8);
// int nEntriesMax2 = 10000;
// create table
p->nTableSize[t] = If_CluPrimeCudd( Abc_MinInt(nEntriesMax1, nEntriesMax2)/2 );
p->pHashTable[t] = ABC_CALLOC( void *, p->nTableSize[t] );
}
// check if this entry exists
HashKey = If_CluHashKey( pTruth, nWords, p->nTableSize );
for ( pEntry = ((If_Hte_t **)p->pHashTable)[HashKey]; pEntry; pEntry = pEntry->pNext )
HashKey = If_CluHashKey( pTruth, nWords, p->nTableSize[t] );
for ( pEntry = ((If_Hte_t **)p->pHashTable[t])[HashKey]; pEntry; pEntry = pEntry->pNext )
if ( memcmp(pEntry->pTruth, pTruth, sizeof(word) * nWords) == 0 )
{
pEntry->Counter++;
return &pEntry->Group;
}
// resize the hash table
if ( p->nTableEntries[t] >= 2 * p->nTableSize[t] )
{
// collect useful entries
If_Hte_t * pPrev;
Vec_Ptr_t * vUseful = Vec_PtrAlloc( p->nTableEntries[t] );
int i, Median = If_CluHashFindMedian( p, t );
for ( i = 0; i < p->nTableSize[t]; i++ )
{
for ( pEntry = ((If_Hte_t **)p->pHashTable[t])[i]; pEntry; )
{
if ( (int)pEntry->Counter > Median )
{
Vec_PtrPush( vUseful, pEntry );
pEntry = pEntry->pNext;
}
else
{
pPrev = pEntry->pNext;
Mem_FixedEntryRecycle( p->pMemEntries, (char *)pEntry );
pEntry = pPrev;
}
}
}
// add useful entries
memset( p->pHashTable[t], 0, sizeof(void *) * p->nTableSize[t] );
Vec_PtrForEachEntry( If_Hte_t *, vUseful, pEntry, i )
{
HashKey = If_CluHashKey( pEntry->pTruth, nWords, p->nTableSize[t] );
pPrev = ((If_Hte_t **)p->pHashTable[t])[HashKey];
if ( pPrev == NULL || pEntry->Counter >= pPrev->Counter )
{
pEntry->pNext = pPrev;
((If_Hte_t **)p->pHashTable[t])[HashKey] = pEntry;
}
else
{
while ( pPrev->pNext && pEntry->Counter < pPrev->pNext->Counter )
pPrev = pPrev->pNext;
pEntry->pNext = pPrev->pNext;
pPrev->pNext = pEntry;
}
}
p->nTableEntries[t] = Vec_PtrSize( vUseful );
Vec_PtrFree( vUseful );
}
// create entry
p->nTableEntries++;
p->nTableEntries[t]++;
pEntry = (If_Hte_t *)Mem_FixedEntryFetch( p->pMemEntries );
memcpy( pEntry->pTruth, pTruth, sizeof(word) * nWords );
memset( &pEntry->Group, 0, sizeof(If_Grp_t) );
pEntry->Group.nVars = CLU_UNUSED;
pEntry->pNext = ((If_Hte_t **)p->pHashTable)[HashKey];
((If_Hte_t **)p->pHashTable)[HashKey] = pEntry;
pEntry->Group = CLU_UNUSED;
pEntry->Counter = 1;
// insert at the beginning
// pEntry->pNext = ((If_Hte_t **)p->pHashTable[t])[HashKey];
// ((If_Hte_t **)p->pHashTable[t])[HashKey] = pEntry;
// insert at the end
pEntry->pNext = NULL;
for ( pPrev = ((If_Hte_t **)p->pHashTable[t])[HashKey]; pPrev && pPrev->pNext; pPrev = pPrev->pNext );
if ( pPrev == NULL )
((If_Hte_t **)p->pHashTable[t])[HashKey] = pEntry;
else
pPrev->pNext = pEntry;
return &pEntry->Group;
}
void If_CluHashPrintStats( If_Man_t * p )
{
If_Hte_t * pEntry;
int i, Counter;
for ( i = 0; i < p->nTableSize; i++ )
{
Counter = 0;
for ( pEntry = ((If_Hte_t **)p->pHashTable)[i]; pEntry; pEntry = pEntry->pNext )
Counter++;
if ( Counter == 0 )
continue;
if ( Counter < 10 )
continue;
printf( "%d=%d ", i, Counter );
}
}
// variable permutation for large functions
static inline void If_CluClear( word * pIn, int nVars )
......@@ -440,10 +588,10 @@ void If_CluPrintGroup( If_Grp_t * g )
{
int i;
printf( "Vars = %d ", g->nVars );
printf( "Myu = %d ", g->nMyu );
printf( "Myu = %d {", g->nMyu );
for ( i = 0; i < g->nVars; i++ )
printf( "%d ", g->pVars[i] );
printf( "\n" );
printf( " %c", 'a' + g->pVars[i] );
printf( " }\n" );
}
void If_CluPrintConfig( int nVars, If_Grp_t * g, If_Grp_t * r, word BStruth, word * pFStruth )
......@@ -966,7 +1114,7 @@ If_Grp_t If_CluFindGroup( word * pF, int nVars, int iVarStart, int * V2P, int *
{
int fVerbose = 0;
int nRounds = 2;//nBSsize;
If_Grp_t G = {0}, * g = &G;
If_Grp_t G = {0}, * g = &G, BestG = {0};
int i, r, v, nCofs, VarBest, nCofsBest2;
assert( nVars > nBSsize && nVars >= nBSsize + iVarStart && nVars <= CLU_VAR_MAX );
assert( nBSsize >= 3 && nBSsize <= 6 );
......@@ -979,7 +1127,10 @@ If_Grp_t If_CluFindGroup( word * pF, int nVars, int iVarStart, int * V2P, int *
if ( g->nMyu == 2 )
return G;
if ( !fDisjoint && If_CluCheckNonDisjointGroup( pF, nVars, V2P, P2V, g ) )
{
// BestG = G;
return G;
}
if ( fVerbose )
{
......@@ -1049,12 +1200,16 @@ If_Grp_t If_CluFindGroup( word * pF, int nVars, int iVarStart, int * V2P, int *
if ( g->nMyu == 2 )
return G;
if ( !fDisjoint && If_CluCheckNonDisjointGroup( pF, nVars, V2P, P2V, g ) )
{
// BestG = G;
return G;
}
}
assert( r == nRounds );
g->nVars = 0;
return G;
// return BestG;
}
......@@ -1142,6 +1297,14 @@ static inline int If_CluSupport( word * t, int nVars )
Supp |= (1 << v);
return Supp;
}
int If_CluSupportSize( word * t, int nVars )
{
int v, SuppSize = 0;
for ( v = 0; v < nVars; v++ )
if ( If_CluHasVar( t, nVars, v ) )
SuppSize++;
return SuppSize;
}
static inline void If_CluTruthShrink( word * pF, int nVars, int nVarsAll, unsigned Phase )
{
word pG[CLU_WRD_MAX], * pIn = pF, * pOut = pG, * pTemp;
......@@ -1187,8 +1350,9 @@ int If_CluMinimumBase( word * t, int * pSupp, int nVarsAll, int * pnVars )
If_Grp_t If_CluCheck( If_Man_t * p, word * pTruth0, int nVars, int iVarStart, int nLutLeaf, int nLutRoot,
If_Grp_t * pR, word * pFunc0, word * pFunc1, word * pLeftOver )
{
int fEnableHashing = 1;
If_Grp_t G1 = {0}, R = {0}, * pHashed = NULL;
int fEnableHashing = 0;
If_Grp_t G1 = {0}, R = {0};
unsigned * pHashed = NULL;
word Truth, pTruth[CLU_WRD_MAX], pF[CLU_WRD_MAX];//, pG[CLU_WRD_MAX];
int V2P[CLU_VAR_MAX+2], P2V[CLU_VAR_MAX+2], pCanonPerm[CLU_VAR_MAX];
int i, nSupp, uCanonPhase;
......@@ -1234,14 +1398,17 @@ If_Grp_t If_CluCheck( If_Man_t * p, word * pTruth0, int nVars, int iVarStart, in
nSupp = If_CluSupport( pF, nVars );
//Extra_PrintBinary( stdout, &nSupp, 16 ); printf( "\n" );
if ( !nSupp || !If_CluSuppIsMinBase(nSupp) )
{
// assert( 0 );
return G1;
}
// check hash table
if ( p && fEnableHashing )
{
pHashed = If_CluHashLookup( p, pTruth );
if ( pHashed && pHashed->nVars != CLU_UNUSED )
G1 = *pHashed;
pHashed = If_CluHashLookup( p, pTruth, 0 );
if ( pHashed && *pHashed != CLU_UNUSED )
If_CluUns2Grp( *pHashed, &G1 );
}
if ( G1.nVars == 0 )
......@@ -1262,6 +1429,15 @@ If_Grp_t If_CluCheck( If_Man_t * p, word * pTruth0, int nVars, int iVarStart, in
G1 = If_CluFindGroup( pF, nVars, iVarStart, V2P, P2V, nLutLeaf, nLutLeaf + nLutRoot == nVars + 1 );
nLutLeaf++;
}
// perform testing with a smaller set
if ( nLutLeaf > 3 && nVars < nLutLeaf + nLutRoot - 3 )
{
nLutLeaf--;
nLutLeaf--;
G1 = If_CluFindGroup( pF, nVars, iVarStart, V2P, P2V, nLutLeaf, nLutLeaf + nLutRoot == nVars + 1 );
nLutLeaf++;
nLutLeaf++;
}
if ( G1.nVars == 0 )
{
// perform testing with a different order
......@@ -1281,7 +1457,9 @@ If_Grp_t If_CluCheck( If_Man_t * p, word * pTruth0, int nVars, int iVarStart, in
printf( "no\n" );
}
*/
return pHashed ? (*pHashed = G1) : G1;
if ( pHashed )
*pHashed = If_CluGrp2Uns( &G1 );
return G1;
}
}
}
......@@ -1319,28 +1497,70 @@ If_Grp_t If_CluCheck( If_Man_t * p, word * pTruth0, int nVars, int iVarStart, in
}
*pR = R;
}
return pHashed ? (*pHashed = G1) : G1;
if ( pHashed )
*pHashed = If_CluGrp2Uns( &G1 );
return G1;
}
// returns the best group found
If_Grp_t If_CluCheck3( If_Man_t * p, word * pTruth0, int nVars, int nLutLeaf, int nLutLeaf2, int nLutRoot,
If_Grp_t * pR, If_Grp_t * pG2, word * pFunc0, word * pFunc1, word * pFunc2 )
{
int fEnableHashing = 1;
static int Counter = 0;
unsigned * pHashed = NULL;
word pLeftOver[CLU_WRD_MAX], Func0, Func1, Func2;
If_Grp_t G1 = {0}, G2 = {0}, R = {0}, R2 = {0};
int i;
Counter++;
if ( Counter == 37590 )
// if ( Counter == 37590 )
// {
// int ns = 0;
// }
// check hash table
if ( p && fEnableHashing )
{
int ns = 0;
pHashed = If_CluHashLookup( p, pTruth0, 1 );
if ( pHashed && *pHashed != CLU_UNUSED )
{
If_CluUns2Grp( *pHashed, &G1 );
return G1;
}
}
// check two-node decomposition
G1 = If_CluCheck( p, pTruth0, nVars, 0, nLutLeaf, nLutRoot + nLutLeaf2 - 1, &R2, &Func0, &Func1, pLeftOver );
// decomposition does not exist
if ( G1.nVars == 0 )
{
// check for decomposition with two outputs
if ( (G1.nMyu == 3 || G1.nMyu == 4) && nLutLeaf == nLutLeaf2 )
{
if ( nVars - nLutLeaf + 2 <= nLutRoot )
{
G1.nVars = nLutLeaf;
if ( pHashed )
*pHashed = If_CluGrp2Uns( &G1 );
// Kit_DsdPrintFromTruth( (unsigned*)pTruth0, nVars ); printf( "\n" );
// If_CluPrintGroup( &G1 );
return G1;
}
}
/*
// if ( nVars == 6 )
{
// Extra_PrintHex( stdout, (unsigned *)pTruth0, nVars ); printf( " " );
Kit_DsdPrintFromTruth( (unsigned*)pTruth0, nVars ); printf( "\n" );
if ( p != NULL )
If_CluCheck3( NULL, pTruth0, nVars, nLutLeaf, nLutLeaf2, nLutRoot, pR, pG2, pFunc0, pFunc1, pFunc2 );
}
*/
if ( pHashed )
*pHashed = If_CluGrp2Uns( &G1 );
return G1;
}
// decomposition exists and sufficient
if ( R2.nVars <= nLutRoot || R2.nVars <= nLutLeaf2 )
{
......@@ -1349,14 +1569,27 @@ If_Grp_t If_CluCheck3( If_Man_t * p, word * pTruth0, int nVars, int nLutLeaf, in
if ( pFunc0 ) *pFunc0 = Func0;
if ( pFunc1 ) *pFunc1 = Func1;
if ( pFunc2 ) *pFunc2 = 0;
if ( pHashed )
*pHashed = If_CluGrp2Uns( &G1 );
return G1;
}
// update iVarStart here!!!
// try second decomposition
{
int Test = 0;
if ( Test )
{
Kit_DsdPrintFromTruth( (unsigned*)&pLeftOver, R2.nVars ); printf( "\n" );
}
}
G2 = If_CluCheck( p, pLeftOver, R2.nVars, 0, nLutLeaf2, nLutRoot, &R, &Func0, &Func2, NULL );
if ( G2.nVars == 0 )
{
if ( pHashed )
*pHashed = If_CluGrp2Uns( &G2 );
return G2;
}
// remap variables
for ( i = 0; i < G2.nVars; i++ )
{
......@@ -1378,6 +1611,8 @@ If_Grp_t If_CluCheck3( If_Man_t * p, word * pTruth0, int nVars, int nLutLeaf, in
if ( pFunc0 ) *pFunc0 = Func0;
if ( pFunc1 ) *pFunc1 = Func1;
if ( pFunc2 ) *pFunc2 = Func2;
if ( pHashed )
*pHashed = If_CluGrp2Uns( &G1 );
return G1;
}
......@@ -1566,19 +1801,21 @@ void If_CluTest()
// word t = 0x0100200000000001;
// word t2[4] = { 0x0000800080008000, 0x8000000000008000, 0x8000000080008000, 0x0000000080008000 };
// word t = 0x07770FFF07770FFF;
word t = 0x002000D000D00020;
// word t = 0x002000D000D00020;
// word t = 0x000F000E000F000F;
// word t = 0xF7FFF7F7F7F7F7F7;
// word t = 0x0234AFDE23400BCE;
word t = 0x0080008880A088FF;
word s = t;
word t2[2] = { 0x7f807f807f80807f, 0x7f807f807f807f80 };
int nVars = 7;
int nLutLeaf = 3;
int nLutLeaf2 = 3;
int nLutRoot = 3;
If_Grp_t G, G2, R;
word Func0, Func1, Func2;
return ;
int nVars = 6;
int nLutLeaf = 5;
int nLutLeaf2 = 5;
int nLutRoot = 5;
If_Grp_t G;
// If_Grp_t G2, R;
// word Func0, Func1, Func2;
return;
/*
int pCanonPerm[CLU_VAR_MAX];
......@@ -1590,6 +1827,7 @@ void If_CluTest()
If_CluSemiCanonicizeVerify( &s, &t, nVars, pCanonPerm, uCanonPhase );
*/
/*
Kit_DsdPrintFromTruth( (unsigned*)t2, nVars ); printf( "\n" );
G = If_CluCheck3( NULL, t2, nVars, nLutLeaf, nLutLeaf2, nLutRoot, &R, &G2, &Func0, &Func1, &Func2 );
......@@ -1603,7 +1841,7 @@ void If_CluTest()
If_CutPerformCheck07( NULL, (unsigned *)&t, 6, 6, NULL );
// return;
*/
Kit_DsdPrintFromTruth( (unsigned*)&t, nVars ); printf( "\n" );
G = If_CluCheck( NULL, &t, nVars, 0, nLutLeaf, nLutRoot, NULL, NULL, NULL, NULL );
......
src/map/if/ifMan.c
......@@ -127,6 +127,12 @@ void If_ManRestart( If_Man_t * p )
***********************************************************************/
void If_ManStop( If_Man_t * p )
{
{
// extern void If_CluHashFindMedian( If_Man_t * p );
// extern void If_CluHashTableCheck( If_Man_t * p );
// If_CluHashFindMedian( p );
// If_CluHashTableCheck( p );
}
if ( p->pPars->fVerbose && p->nCutsUselessAll )
{
int i;
......@@ -160,9 +166,12 @@ void If_ManStop( If_Man_t * p )
if ( p->vSwitching )
Vec_IntFree( p->vSwitching );
// hash table
if ( p->pPars->fVerbose && p->nTableEntries )
printf( "Hash table: Entries = %7d. Size = %7d.\n", p->nTableEntries, p->nTableSize );
ABC_FREE( p->pHashTable );
// if ( p->pPars->fVerbose && p->nTableEntries[0] )
// printf( "Hash table 2: Entries = %7d. Size = %7d.\n", p->nTableEntries[0], p->nTableSize[0] );
// if ( p->pPars->fVerbose && p->nTableEntries[1] )
// printf( "Hash table 3: Entries = %7d. Size = %7d.\n", p->nTableEntries[1], p->nTableSize[1] );
ABC_FREE( p->pHashTable[0] );
ABC_FREE( p->pHashTable[1] );
if ( p->pMemEntries )
Mem_FixedStop( p->pMemEntries, 0 );
ABC_FREE( p );
......
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