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Improvements to the truth table computations.

This commit is contained in:
Alan Mishchenko 2012-11-01 14:23:05 -07:00
parent ce3f8cb1d1
commit d56570f235
5 changed files with 953 additions and 1164 deletions
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1
src/base/abci/abc.c
View File

@ -4937,6 +4937,7 @@ usage:
Abc_Print( -2, "\t 2: semi-canonical form by counting 1s in cofactors\n" );
Abc_Print( -2, "\t 3: Jake's hybrid semi-canonical form (fast)\n" );
Abc_Print( -2, "\t 4: Jake's hybrid semi-canonical form (high-effort)\n" );
Abc_Print( -2, "\t 5: new fast hybrid semi-canonical form\n" );
Abc_Print( -2, "\t-N <num> : the number of support variables (binary files only) [default = unused]\n" );
Abc_Print( -2, "\t-d : toggle dumping resulting functions into a file [default = %s]\n", fDumpRes? "yes": "no" );
Abc_Print( -2, "\t-b : toggle dumping in binary format [default = %s]\n", fBinary? "yes": "no" );

18
src/base/abci/abcNpn.c
View File

@ -23,6 +23,7 @@
#include "bool/kit/kit.h"
#include "bool/lucky/lucky.h"
#include "opt/dau/dau.h"
ABC_NAMESPACE_IMPL_START
@ -190,6 +191,8 @@ void Abc_TruthNpnPerform( Abc_TtStore_t * p, int NpnType, int fVerbose )
pAlgoName = "Jake's hybrid fast ";
else if ( NpnType == 4 )
pAlgoName = "Jake's hybrid good ";
else if ( NpnType == 5 )
pAlgoName = "new hybrid fast ";
assert( p->nVars <= 16 );
if ( pAlgoName )
@ -202,10 +205,8 @@ void Abc_TruthNpnPerform( Abc_TtStore_t * p, int NpnType, int fVerbose )
{
for ( i = 0; i < p->nFuncs; i++ )
{
extern void Abc_TtCofactorTest( word * pTruth, int nVars, int i );
if ( fVerbose )
printf( "%7d : ", i );
Abc_TtCofactorTest( p->pFuncs[i], p->nVars, i );
if ( fVerbose )
Extra_PrintHex( stdout, (unsigned *)p->pFuncs[i], p->nVars ), printf( "\n" );
}
@ -261,6 +262,17 @@ void Abc_TruthNpnPerform( Abc_TtStore_t * p, int NpnType, int fVerbose )
Extra_PrintHex( stdout, (unsigned *)p->pFuncs[i], p->nVars ), Abc_TruthNpnPrint(pCanonPerm, uCanonPhase, p->nVars), printf( "\n" );
}
}
else if ( NpnType == 5 )
{
for ( i = 0; i < p->nFuncs; i++ )
{
if ( fVerbose )
printf( "%7d : ", i );
uCanonPhase = Abc_TtCanonicize( p->pFuncs[i], p->nVars, pCanonPerm );
if ( fVerbose )
Extra_PrintHex( stdout, (unsigned *)p->pFuncs[i], p->nVars ), Abc_TruthNpnPrint(pCanonPerm, uCanonPhase, p->nVars), printf( "\n" );
}
}
else assert( 0 );
clk = clock() - clk;
printf( "Classes =%9d ", Abc_TruthNpnCountUnique(p) );
@ -324,7 +336,7 @@ int Abc_NpnTest( char * pFileName, int NpnType, int nVarNum, int fDumpRes, int f
{
if ( fVerbose )
printf( "Using truth tables from file \"%s\"...\n", pFileName );
if ( NpnType >= 0 && NpnType <= 4 )
if ( NpnType >= 0 && NpnType <= 5 )
Abc_TruthNpnTest( pFileName, NpnType, nVarNum, fDumpRes, fBinary, fVerbose );
else
printf( "Unknown canonical form value (%d).\n", NpnType );

531
src/misc/util/utilTruth.h
View File

@ -61,6 +61,14 @@ static word s_CMasks6[5] = {
0x000000000000FFFF
};
static word s_PMasks[5][3] = {
{ 0x9999999999999999, 0x2222222222222222, 0x4444444444444444 },
{ 0xC3C3C3C3C3C3C3C3, 0x0C0C0C0C0C0C0C0C, 0x3030303030303030 },
{ 0xF00FF00FF00FF00F, 0x00F000F000F000F0, 0x0F000F000F000F00 },
{ 0xFF0000FFFF0000FF, 0x0000FF000000FF00, 0x00FF000000FF0000 },
{ 0xFFFF00000000FFFF, 0x00000000FFFF0000, 0x0000FFFF00000000 }
};
////////////////////////////////////////////////////////////////////////
/// MACRO DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
@ -161,10 +169,9 @@ static inline int Abc_TtIsConst1( word * pIn1, int nWords )
return 1;
}
/**Function*************************************************************
Synopsis [Compares Cof0 and Cof1.]
Synopsis []
Description []
@ -173,217 +180,42 @@ static inline int Abc_TtIsConst1( word * pIn1, int nWords )
SeeAlso []
***********************************************************************/
static inline int Abc_TtCompare1VarCofs( word * pTruth, int nWords, int iVar )
static inline void Abc_TtCofactor0( word * pTruth, int nWords, int iVar )
{
if ( nWords == 1 )
pTruth[0] = ((pTruth[0] & s_Truths6Neg[iVar]) << (1 << iVar)) | (pTruth[0] & s_Truths6Neg[iVar]);
else if ( iVar <= 5 )
{
word Cof0 = pTruth[0] & s_Truths6Neg[iVar];
word Cof1 = (pTruth[0] >> (1 << iVar)) & s_Truths6Neg[iVar];
if ( Cof0 != Cof1 )
return Cof0 < Cof1 ? -1 : 1;
return 0;
}
if ( iVar <= 5 )
{
word Cof0, Cof1;
int w, shift = (1 << iVar);
for ( w = 0; w < nWords; w++ )
{
Cof0 = pTruth[w] & s_Truths6Neg[iVar];
Cof1 = (pTruth[w] >> shift) & s_Truths6Neg[iVar];
if ( Cof0 != Cof1 )
return Cof0 < Cof1 ? -1 : 1;
}
return 0;
pTruth[w] = ((pTruth[w] & s_Truths6Neg[iVar]) << shift) | (pTruth[w] & s_Truths6Neg[iVar]);
}
// if ( iVar > 5 )
else // if ( iVar > 5 )
{
word * pLimit = pTruth + nWords;
int i, iStep = Abc_TtWordNum(iVar);
assert( nWords >= 2 );
for ( ; pTruth < pLimit; pTruth += 2*iStep )
for ( i = 0; i < iStep; i++ )
if ( pTruth[i] != pTruth[i + iStep] )
return pTruth[i] < pTruth[i + iStep] ? -1 : 1;
return 0;
pTruth[i + iStep] = pTruth[i];
}
}
static inline int Abc_TtCompare1VarCofsRev( word * pTruth, int nWords, int iVar )
static inline void Abc_TtCofactor1( word * pTruth, int nWords, int iVar )
{
if ( nWords == 1 )
{
word Cof0 = pTruth[0] & s_Truths6Neg[iVar];
word Cof1 = (pTruth[0] >> (1 << iVar)) & s_Truths6Neg[iVar];
if ( Cof0 != Cof1 )
return Cof0 < Cof1 ? -1 : 1;
return 0;
}
if ( iVar <= 5 )
{
word Cof0, Cof1;
int w, shift = (1 << iVar);
for ( w = nWords - 1; w >= 0; w-- )
{
Cof0 = pTruth[w] & s_Truths6Neg[iVar];
Cof1 = (pTruth[w] >> shift) & s_Truths6Neg[iVar];
if ( Cof0 != Cof1 )
return Cof0 < Cof1 ? -1 : 1;
}
return 0;
}
// if ( iVar > 5 )
{
word * pLimit = pTruth + nWords;
int i, iStep = Abc_TtWordNum(iVar);
assert( nWords >= 2 );
for ( pLimit -= 2*iStep; pLimit >= pTruth; pLimit -= 2*iStep )
for ( i = iStep - 1; i >= 0; i-- )
if ( pLimit[i] != pLimit[i + iStep] )
return pLimit[i] < pLimit[i + iStep] ? -1 : 1;
return 0;
}
}
/**Function*************************************************************
Synopsis [Checks pairs of cofactors w.r.t. adjacent variables.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int Abc_TtCheckEqual2VarCofs( word * pTruth, int nWords, int iVar, int Num1, int Num2 )
{
assert( Num1 < Num2 && Num2 < 4 );
if ( nWords == 1 )
return ((pTruth[0] >> (Num2 * (1 << iVar))) & s_CMasks6[iVar]) == ((pTruth[0] >> (Num1 * (1 << iVar))) & s_CMasks6[iVar]);
if ( iVar <= 4 )
pTruth[0] = (pTruth[0] & s_Truths6[iVar]) | ((pTruth[0] & s_Truths6[iVar]) >> (1 << iVar));
else if ( iVar <= 5 )
{
int w, shift = (1 << iVar);
for ( w = 0; w < nWords; w++ )
if ( ((pTruth[w] >> Num2 * shift) & s_CMasks6[iVar]) != ((pTruth[w] >> Num1 * shift) & s_CMasks6[iVar]) )
return 0;
return 1;
pTruth[w] = (pTruth[w] & s_Truths6[iVar]) | ((pTruth[w] & s_Truths6[iVar]) >> shift);
}
if ( iVar == 5 )
{
unsigned * pTruthU = (unsigned *)pTruth;
unsigned * pLimitU = (unsigned *)(pTruth + nWords);
assert( nWords >= 2 );
for ( ; pTruthU < pLimitU; pTruthU += 4 )
if ( pTruthU[Num2] != pTruthU[Num1] )
return 0;
return 1;
}
// if ( iVar > 5 )
else // if ( iVar > 5 )
{
word * pLimit = pTruth + nWords;
int i, iStep = Abc_TtWordNum(iVar);
assert( nWords >= 4 );
for ( ; pTruth < pLimit; pTruth += 4*iStep )
for ( ; pTruth < pLimit; pTruth += 2*iStep )
for ( i = 0; i < iStep; i++ )
if ( pTruth[i+Num2*iStep] != pTruth[i+Num1*iStep] )
return 0;
return 1;
}
}
static inline int Abc_TtCompare2VarCofs( word * pTruth, int nWords, int iVar, int Num1, int Num2 )
{
assert( Num1 < Num2 && Num2 < 4 );
if ( nWords == 1 )
{
word Cof1 = (pTruth[0] >> (Num1 * (1 << iVar))) & s_CMasks6[iVar];
word Cof2 = (pTruth[0] >> (Num2 * (1 << iVar))) & s_CMasks6[iVar];
if ( Cof1 != Cof2 )
return Cof1 < Cof2 ? -1 : 1;
return 0;
}
if ( iVar <= 4 )
{
word Cof1, Cof2;
int w, shift = (1 << iVar);
for ( w = 0; w < nWords; w++ )
{
Cof1 = (pTruth[w] >> Num1 * shift) & s_CMasks6[iVar];
Cof2 = (pTruth[w] >> Num2 * shift) & s_CMasks6[iVar];
if ( Cof1 != Cof2 )
return Cof1 < Cof2 ? -1 : 1;
}
return 0;
}
if ( iVar == 5 )
{
unsigned * pTruthU = (unsigned *)pTruth;
unsigned * pLimitU = (unsigned *)(pTruth + nWords);
assert( nWords >= 2 );
for ( ; pTruthU < pLimitU; pTruthU += 4 )
if ( pTruthU[Num1] != pTruthU[Num2] )
return pTruthU[Num1] < pTruthU[Num2] ? -1 : 1;
return 0;
}
// if ( iVar > 5 )
{
word * pLimit = pTruth + nWords;
int i, iStep = Abc_TtWordNum(iVar);
int Offset1 = Num1*iStep;
int Offset2 = Num2*iStep;
assert( nWords >= 4 );
for ( ; pTruth < pLimit; pTruth += 4*iStep )
for ( i = 0; i < iStep; i++ )
if ( pTruth[i + Offset1] != pTruth[i + Offset2] )
return pTruth[i + Offset1] < pTruth[i + Offset2] ? -1 : 1;
return 0;
}
}
static inline int Abc_TtCompare2VarCofsRev( word * pTruth, int nWords, int iVar, int Num1, int Num2 )
{
assert( Num1 < Num2 && Num2 < 4 );
if ( nWords == 1 )
{
word Cof1 = (pTruth[0] >> (Num1 * (1 << iVar))) & s_CMasks6[iVar];
word Cof2 = (pTruth[0] >> (Num2 * (1 << iVar))) & s_CMasks6[iVar];
if ( Cof1 != Cof2 )
return Cof1 < Cof2 ? -1 : 1;
return 0;
}
if ( iVar <= 4 )
{
word Cof1, Cof2;
int w, shift = (1 << iVar);
for ( w = nWords - 1; w >= 0; w-- )
{
Cof1 = (pTruth[w] >> Num1 * shift) & s_CMasks6[iVar];
Cof2 = (pTruth[w] >> Num2 * shift) & s_CMasks6[iVar];
if ( Cof1 != Cof2 )
return Cof1 < Cof2 ? -1 : 1;
}
return 0;
}
if ( iVar == 5 )
{
unsigned * pTruthU = (unsigned *)pTruth;
unsigned * pLimitU = (unsigned *)(pTruth + nWords);
assert( nWords >= 2 );
for ( pLimitU -= 4; pLimitU >= pTruthU; pLimitU -= 4 )
if ( pLimitU[Num1] != pLimitU[Num2] )
return pLimitU[Num1] < pLimitU[Num2] ? -1 : 1;
return 0;
}
// if ( iVar > 5 )
{
word * pLimit = pTruth + nWords;
int i, iStep = Abc_TtWordNum(iVar);
int Offset1 = Num1*iStep;
int Offset2 = Num2*iStep;
assert( nWords >= 4 );
for ( pLimit -= 4*iStep; pLimit >= pTruth; pLimit -= 4*iStep )
for ( i = iStep - 1; i >= 0; i-- )
if ( pLimit[i + Offset1] != pLimit[i + Offset2] )
return pLimit[i + Offset1] < pLimit[i + Offset2] ? -1 : 1;
return 0;
pTruth[i] = pTruth[i + iStep];
}
}
@ -449,56 +281,6 @@ static inline int Abc_TtCheckEqualCofs( word * pTruth, int nWords, int iVar, int
}
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Abc_TtCofactor0( word * pTruth, int nWords, int iVar )
{
if ( nWords == 1 )
pTruth[0] = ((pTruth[0] & s_Truths6Neg[iVar]) << (1 << iVar)) | (pTruth[0] & s_Truths6Neg[iVar]);
else if ( iVar <= 5 )
{
int w, shift = (1 << iVar);
for ( w = 0; w < nWords; w++ )
pTruth[w] = ((pTruth[w] & s_Truths6Neg[iVar]) << shift) | (pTruth[w] & s_Truths6Neg[iVar]);
}
else // if ( iVar > 5 )
{
word * pLimit = pTruth + nWords;
int i, iStep = Abc_TtWordNum(iVar);
for ( ; pTruth < pLimit; pTruth += 2*iStep )
for ( i = 0; i < iStep; i++ )
pTruth[i + iStep] = pTruth[i];
}
}
static inline void Abc_TtCofactor1( word * pTruth, int nWords, int iVar )
{
if ( nWords == 1 )
pTruth[0] = (pTruth[0] & s_Truths6[iVar]) | ((pTruth[0] & s_Truths6[iVar]) >> (1 << iVar));
else if ( iVar <= 5 )
{
int w, shift = (1 << iVar);
for ( w = 0; w < nWords; w++ )
pTruth[w] = (pTruth[w] & s_Truths6[iVar]) | ((pTruth[w] & s_Truths6[iVar]) >> shift);
}
else // if ( iVar > 5 )
{
word * pLimit = pTruth + nWords;
int i, iStep = Abc_TtWordNum(iVar);
for ( ; pTruth < pLimit; pTruth += 2*iStep )
for ( i = 0; i < iStep; i++ )
pTruth[i] = pTruth[i + iStep];
}
}
/**Function*************************************************************
@ -826,6 +608,10 @@ static inline int Abc_Tt6SupportAndSize( word t, int nVars, int * pSuppSize )
SeeAlso []
***********************************************************************/
static inline word Abc_Tt6Flip( word Truth, int iVar )
{
return Truth = ((Truth << (1 << iVar)) & s_Truths6[iVar]) | ((Truth & s_Truths6[iVar]) >> (1 << iVar));
}
static inline void Abc_TtFlip( word * pTruth, int nWords, int iVar )
{
if ( nWords == 1 )
@ -857,9 +643,13 @@ static inline void Abc_TtFlip( word * pTruth, int nWords, int iVar )
SeeAlso []
***********************************************************************/
static inline word Abc_Tt6SwapAdjacent( word Truth, int iVar )
{
return (Truth & s_PMasks[iVar][0]) | ((Truth & s_PMasks[iVar][1]) << (1 << iVar)) | ((Truth & s_PMasks[iVar][2]) >> (1 << iVar));
}
static inline void Abc_TtSwapAdjacent( word * pTruth, int nWords, int iVar )
{
static word PMasks[5][3] = {
static word s_PMasks[5][3] = {
{ 0x9999999999999999, 0x2222222222222222, 0x4444444444444444 },
{ 0xC3C3C3C3C3C3C3C3, 0x0C0C0C0C0C0C0C0C, 0x3030303030303030 },
{ 0xF00FF00FF00FF00F, 0x00F000F000F000F0, 0x0F000F000F000F00 },
@ -870,7 +660,7 @@ static inline void Abc_TtSwapAdjacent( word * pTruth, int nWords, int iVar )
{
int i, Shift = (1 << iVar);
for ( i = 0; i < nWords; i++ )
pTruth[i] = (pTruth[i] & PMasks[iVar][0]) | ((pTruth[i] & PMasks[iVar][1]) << Shift) | ((pTruth[i] & PMasks[iVar][2]) >> Shift);
pTruth[i] = (pTruth[i] & s_PMasks[iVar][0]) | ((pTruth[i] & s_PMasks[iVar][1]) << Shift) | ((pTruth[i] & s_PMasks[iVar][2]) >> Shift);
}
else if ( iVar == 5 )
{
@ -888,10 +678,9 @@ static inline void Abc_TtSwapAdjacent( word * pTruth, int nWords, int iVar )
ABC_SWAP( word, pTruth[i + iStep], pTruth[i + 2*iStep] );
}
}
static inline void Abc_TtSwapVars( word * pTruth, int nVars, int iVar, int jVar )
{
static word PPMasks[5][6][3] = {
static word Ps_PMasks[5][6][3] = {
{
{ 0x0000000000000000, 0x0000000000000000, 0x0000000000000000 }, // 0 0
{ 0x9999999999999999, 0x2222222222222222, 0x4444444444444444 }, // 0 1
@ -940,18 +729,18 @@ static inline void Abc_TtSwapVars( word * pTruth, int nVars, int iVar, int jVar
assert( iVar < jVar && jVar < nVars );
if ( nVars <= 6 )
{
word * pMasks = PPMasks[iVar][jVar];
word * s_PMasks = Ps_PMasks[iVar][jVar];
int shift = (1 << jVar) - (1 << iVar);
pTruth[0] = (pTruth[0] & pMasks[0]) | ((pTruth[0] & pMasks[1]) << shift) | ((pTruth[0] & pMasks[2]) >> shift);
pTruth[0] = (pTruth[0] & s_PMasks[0]) | ((pTruth[0] & s_PMasks[1]) << shift) | ((pTruth[0] & s_PMasks[2]) >> shift);
return;
}
if ( jVar <= 5 )
{
word * pMasks = PPMasks[iVar][jVar];
word * s_PMasks = Ps_PMasks[iVar][jVar];
int nWords = Abc_TtWordNum(nVars);
int w, shift = (1 << jVar) - (1 << iVar);
for ( w = 0; w < nWords; w++ )
pTruth[w] = (pTruth[w] & pMasks[0]) | ((pTruth[w] & pMasks[1]) << shift) | ((pTruth[w] & pMasks[2]) >> shift);
pTruth[w] = (pTruth[w] & s_PMasks[0]) | ((pTruth[w] & s_PMasks[1]) << shift) | ((pTruth[w] & s_PMasks[2]) >> shift);
return;
}
if ( iVar <= 5 && jVar > 5 )
@ -982,6 +771,38 @@ static inline void Abc_TtSwapVars( word * pTruth, int nVars, int iVar, int jVar
}
}
/**Function*************************************************************
Synopsis [Implemeting given NPN config.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Abc_TtImplementNpnConfig( word * pTruth, int nVars, char * pCanonPerm, unsigned uCanonPhase )
{
int i, k, nWords = Abc_TtWordNum( nVars );
if ( (uCanonPhase >> nVars) & 1 )
Abc_TtNot( pTruth, nWords );
for ( i = 0; i < nVars; i++ )
if ( (uCanonPhase >> i) & 1 )
Abc_TtFlip( pTruth, nWords, i );
for ( i = 0; i < nVars; i++ )
{
for ( k = i; k < nVars; k++ )
if ( pCanonPerm[k] == i )
break;
assert( k < nVars );
if ( i == k )
continue;
Abc_TtSwapVars( pTruth, nVars, i, k );
ABC_SWAP( int, pCanonPerm[i], pCanonPerm[k] );
}
}
/**Function*************************************************************
Synopsis []
@ -1013,220 +834,6 @@ static inline int Abc_TtCountOnes( word x )
return (int)(x & 0xFF);
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int Abc_TtCountOnesInTruth( word * pTruth, int nVars )
{
int nWords = Abc_TtWordNum( nVars );
int k, Counter = 0;
for ( k = 0; k < nWords; k++ )
if ( pTruth[k] )
Counter += Abc_TtCountOnes( pTruth[k] );
return Counter;
}
static inline void Abc_TtCountOnesInCofs( word * pTruth, int nVars, int * pStore )
{
word Temp;
int i, k, Counter, nWords;
if ( nVars <= 6 )
{
for ( i = 0; i < nVars; i++ )
if ( pTruth[0] & s_Truths6Neg[i] )
pStore[i] = Abc_TtCountOnes( pTruth[0] & s_Truths6Neg[i] );
else
pStore[i] = 0;
return;
}
assert( nVars > 6 );
nWords = Abc_TtWordNum( nVars );
memset( pStore, 0, sizeof(int) * nVars );
for ( k = 0; k < nWords; k++ )
{
// count 1's for the first six variables
for ( i = 0; i < 6; i++ )
if ( (Temp = (pTruth[k] & s_Truths6Neg[i]) | ((pTruth[k+1] & s_Truths6Neg[i]) << (1 << i))) )
pStore[i] += Abc_TtCountOnes( Temp );
// count 1's for all other variables
if ( pTruth[k] )
{
Counter = Abc_TtCountOnes( pTruth[k] );
for ( i = 6; i < nVars; i++ )
if ( (k & (1 << (i-6))) == 0 )
pStore[i] += Counter;
}
k++;
// count 1's for all other variables
if ( pTruth[k] )
{
Counter = Abc_TtCountOnes( pTruth[k] );
for ( i = 6; i < nVars; i++ )
if ( (k & (1 << (i-6))) == 0 )
pStore[i] += Counter;
}
}
}
static inline void Abc_TtCountOnesInCofsSlow( word * pTruth, int nVars, int * pStore )
{
static int bit_count[256] = {
0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4,1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,4,5,5,6,5,6,6,7,5,6,6,7,6,7,7,8
};
int i, k, nBytes;
unsigned char * pTruthC = (unsigned char *)pTruth;
nBytes = 8 * Abc_TtWordNum( nVars );
memset( pStore, 0, sizeof(int) * nVars );
for ( k = 0; k < nBytes; k++ )
{
pStore[0] += bit_count[ pTruthC[k] & 0x55 ];
pStore[1] += bit_count[ pTruthC[k] & 0x33 ];
pStore[2] += bit_count[ pTruthC[k] & 0x0F ];
for ( i = 3; i < nVars; i++ )
if ( (k & (1 << (i-3))) == 0 )
pStore[i] += bit_count[pTruthC[k]];
}
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline unsigned Abc_TtSemiCanonicize( word * pTruth, int nVars, char * pCanonPerm, int * pStoreOut )
{
extern int Abc_TtCountOnesInCofsFast( word * pTruth, int nVars, int * pStore );
int fOldSwap = 0;
int pStoreIn[17];
int * pStore = pStoreOut ? pStoreOut : pStoreIn;
// int pStore2[17];
int nWords = Abc_TtWordNum( nVars );
int i, Temp, nOnes;//, fChange;//, nSwaps = 0;//;
int k, BestK;
unsigned uCanonPhase = 0;
assert( nVars <= 16 );
for ( i = 0; i < nVars; i++ )
pCanonPerm[i] = i;
// normalize polarity
nOnes = Abc_TtCountOnesInTruth( pTruth, nVars );
if ( nOnes > nWords * 32 )
{
Abc_TtNot( pTruth, nWords );
nOnes = nWords*64 - nOnes;
uCanonPhase |= (1 << nVars);
}
// normalize phase
Abc_TtCountOnesInCofs( pTruth, nVars, pStore );
pStore[nVars] = nOnes;
// Abc_TtCountOnesInCofsFast( pTruth, nVars, pStore );
// Abc_TtCountOnesInCofsFast( pTruth, nVars, pStore2 );
// for ( i = 0; i < nVars; i++ )
// assert( pStore[i] == pStore2[i] );
for ( i = 0; i < nVars; i++ )
{
if ( pStore[i] >= nOnes - pStore[i] )
continue;
Abc_TtFlip( pTruth, nWords, i );
uCanonPhase |= (1 << i);
pStore[i] = nOnes - pStore[i];
}
if ( fOldSwap )
{
int fChange;
do {
fChange = 0;
for ( i = 0; i < nVars-1; i++ )
{
// if ( pStore[i] <= pStore[i+1] )
if ( pStore[i] >= pStore[i+1] )
continue;
Temp = pCanonPerm[i];
pCanonPerm[i] = pCanonPerm[i+1];
pCanonPerm[i+1] = Temp;
Temp = pStore[i];
pStore[i] = pStore[i+1];
pStore[i+1] = Temp;
if ( ((uCanonPhase >> i) & 1) != ((uCanonPhase >> (i+1)) & 1) )
{
uCanonPhase ^= (1 << i);
uCanonPhase ^= (1 << (i+1));
}
Abc_TtSwapAdjacent( pTruth, nWords, i );
fChange = 1;
// nSwaps++;
}
} while ( fChange );
}
else
{
for ( i = 0; i < nVars - 1; i++ )
{
BestK = i + 1;
for ( k = i + 2; k < nVars; k++ )
// if ( pStore[BestK] > pStore[k] )
if ( pStore[BestK] < pStore[k] )
BestK = k;
// if ( pStore[i] <= pStore[BestK] )
if ( pStore[i] >= pStore[BestK] )
continue;
Temp = pCanonPerm[i];
pCanonPerm[i] = pCanonPerm[BestK];
pCanonPerm[BestK] = Temp;
Temp = pStore[i];
pStore[i] = pStore[BestK];
pStore[BestK] = Temp;
if ( ((uCanonPhase >> i) & 1) != ((uCanonPhase >> BestK) & 1) )
{
uCanonPhase ^= (1 << i);
uCanonPhase ^= (1 << BestK);
}
Abc_TtSwapVars( pTruth, nVars, i, BestK );
// nSwaps++;
}
}
// printf( "%d ", nSwaps );
/*
printf( "Minterms: " );
for ( i = 0; i < nVars; i++ )
printf( "%d ", pStore[i] );
printf( "\n" );
*/
return uCanonPhase;
}
/**Function*************************************************************
Synopsis []

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/**CFile****************************************************************
FileName [dau.h]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [DAG-aware unmapping.]
Synopsis [External declarations.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: dau.h,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#ifndef ABC__DAU___h
#define ABC__DAU___h
////////////////////////////////////////////////////////////////////////
/// INCLUDES ///
////////////////////////////////////////////////////////////////////////
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <time.h>
#include "misc/vec/vec.h"
////////////////////////////////////////////////////////////////////////
/// PARAMETERS ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_HEADER_START
////////////////////////////////////////////////////////////////////////
/// BASIC TYPES ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// MACRO DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
/*=== dauCanon.c ==========================================================*/
extern unsigned Abc_TtCanonicize( word * pTruth, int nVars, char * pCanonPerm );
ABC_NAMESPACE_HEADER_END
#endif
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////

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