/**CFile**************************************************************** FileName [utilTruth.h] SystemName [ABC: Logic synthesis and verification system.] PackageName [Truth table manipulation.] Synopsis [Truth table manipulation.] Author [Alan Mishchenko] Affiliation [UC Berkeley] Date [Ver. 1.0. Started - October 28, 2012.] Revision [$Id: utilTruth.h,v 1.00 2012/10/28 00:00:00 alanmi Exp $] ***********************************************************************/ #ifndef ABC__misc__util__utilTruth_h #define ABC__misc__util__utilTruth_h //////////////////////////////////////////////////////////////////////// /// INCLUDES /// //////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////// /// PARAMETERS /// //////////////////////////////////////////////////////////////////////// ABC_NAMESPACE_HEADER_START //////////////////////////////////////////////////////////////////////// /// BASIC TYPES /// //////////////////////////////////////////////////////////////////////// static word s_Truths6[6] = { ABC_CONST(0xAAAAAAAAAAAAAAAA), ABC_CONST(0xCCCCCCCCCCCCCCCC), ABC_CONST(0xF0F0F0F0F0F0F0F0), ABC_CONST(0xFF00FF00FF00FF00), ABC_CONST(0xFFFF0000FFFF0000), ABC_CONST(0xFFFFFFFF00000000) }; static word s_Truths6Neg[6] = { ABC_CONST(0x5555555555555555), ABC_CONST(0x3333333333333333), ABC_CONST(0x0F0F0F0F0F0F0F0F), ABC_CONST(0x00FF00FF00FF00FF), ABC_CONST(0x0000FFFF0000FFFF), ABC_CONST(0x00000000FFFFFFFF) }; static word s_PMasks[5][3] = { { ABC_CONST(0x9999999999999999), ABC_CONST(0x2222222222222222), ABC_CONST(0x4444444444444444) }, { ABC_CONST(0xC3C3C3C3C3C3C3C3), ABC_CONST(0x0C0C0C0C0C0C0C0C), ABC_CONST(0x3030303030303030) }, { ABC_CONST(0xF00FF00FF00FF00F), ABC_CONST(0x00F000F000F000F0), ABC_CONST(0x0F000F000F000F00) }, { ABC_CONST(0xFF0000FFFF0000FF), ABC_CONST(0x0000FF000000FF00), ABC_CONST(0x00FF000000FF0000) }, { ABC_CONST(0xFFFF00000000FFFF), ABC_CONST(0x00000000FFFF0000), ABC_CONST(0x0000FFFF00000000) } }; //////////////////////////////////////////////////////////////////////// /// MACRO DEFINITIONS /// //////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////// /// FUNCTION DECLARATIONS /// //////////////////////////////////////////////////////////////////////// /**Function************************************************************* Synopsis [] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ // read/write/flip i-th bit of a bit string table: static inline int Abc_TtGetBit( word * p, int i ) { return (int)(p[i>>6] >> (i & 63)) & 1; } static inline void Abc_TtSetBit( word * p, int i ) { p[i>>6] |= (((word)1)<<(i & 63)); } static inline void Abc_TtXorBit( word * p, int i ) { p[i>>6] ^= (((word)1)<<(i & 63)); } // read/write k-th digit d of a hexadecimal number: static inline int Abc_TtGetHex( word * p, int k ) { return (int)(p[k>>4] >> ((k<<2) & 63)) & 15; } static inline void Abc_TtSetHex( word * p, int k, int d ) { p[k>>4] |= (((word)d)<<((k<<2) & 63)); } static inline void Abc_TtXorHex( word * p, int k, int d ) { p[k>>4] ^= (((word)d)<<((k<<2) & 63)); } /**Function************************************************************* Synopsis [] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline int Abc_TtWordNum( int nVars ) { return nVars <= 6 ? 1 : 1 << (nVars-6); } static inline int Abc_TtByteNum( int nVars ) { return nVars <= 3 ? 1 : 1 << (nVars-3); } static inline int Abc_TtHexDigitNum( int nVars ) { return nVars <= 2 ? 1 : 1 << (nVars-2); } /**Function************************************************************* Synopsis [] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline void Abc_TtClear( word * pOut, int nWords ) { int w; for ( w = 0; w < nWords; w++ ) pOut[w] = 0; } static inline void Abc_TtFill( word * pOut, int nWords ) { int w; for ( w = 0; w < nWords; w++ ) pOut[w] = ~(word)0; } static inline void Abc_TtUnit( word * pOut, int nWords ) { int w; for ( w = 0; w < nWords; w++ ) pOut[w] = s_Truths6[0]; } static inline void Abc_TtNot( word * pOut, int nWords ) { int w; for ( w = 0; w < nWords; w++ ) pOut[w] = ~pOut[w]; } static inline void Abc_TtCopy( word * pOut, word * pIn, int nWords, int fCompl ) { int w; if ( fCompl ) for ( w = 0; w < nWords; w++ ) pOut[w] = ~pIn[w]; else for ( w = 0; w < nWords; w++ ) pOut[w] = pIn[w]; } static inline void Abc_TtAnd( word * pOut, word * pIn1, word * pIn2, int nWords, int fCompl ) { int w; if ( fCompl ) for ( w = 0; w < nWords; w++ ) pOut[w] = ~(pIn1[w] & pIn2[w]); else for ( w = 0; w < nWords; w++ ) pOut[w] = pIn1[w] & pIn2[w]; } static inline void Abc_TtSharp( word * pOut, word * pIn1, word * pIn2, int nWords ) { int w; for ( w = 0; w < nWords; w++ ) pOut[w] = pIn1[w] & ~pIn2[w]; } static inline void Abc_TtOr( word * pOut, word * pIn1, word * pIn2, int nWords ) { int w; for ( w = 0; w < nWords; w++ ) pOut[w] = pIn1[w] | pIn2[w]; } static inline void Abc_TtXor( word * pOut, word * pIn1, word * pIn2, int nWords, int fCompl ) { int w; if ( fCompl ) for ( w = 0; w < nWords; w++ ) pOut[w] = pIn1[w] ^ ~pIn2[w]; else for ( w = 0; w < nWords; w++ ) pOut[w] = pIn1[w] ^ pIn2[w]; } static inline void Abc_TtMux( word * pOut, word * pCtrl, word * pIn1, word * pIn0, int nWords ) { int w; for ( w = 0; w < nWords; w++ ) pOut[w] = (pCtrl[w] & pIn1[w]) | (~pCtrl[w] & pIn0[w]); } static inline int Abc_TtEqual( word * pIn1, word * pIn2, int nWords ) { int w; for ( w = 0; w < nWords; w++ ) if ( pIn1[w] != pIn2[w] ) return 0; return 1; } static inline int Abc_TtCompare( word * pIn1, word * pIn2, int nWords ) { int w; for ( w = 0; w < nWords; w++ ) if ( pIn1[w] != pIn2[w] ) return (pIn1[w] < pIn2[w]) ? -1 : 1; return 0; } static inline int Abc_TtCompareRev( word * pIn1, word * pIn2, int nWords ) { int w; for ( w = nWords - 1; w >= 0; w-- ) if ( pIn1[w] != pIn2[w] ) return (pIn1[w] < pIn2[w]) ? -1 : 1; return 0; } static inline int Abc_TtIsConst0( word * pIn1, int nWords ) { int w; for ( w = 0; w < nWords; w++ ) if ( pIn1[w] ) return 0; return 1; } static inline int Abc_TtIsConst1( word * pIn1, int nWords ) { int w; for ( w = 0; w < nWords; w++ ) if ( ~pIn1[w] ) return 0; return 1; } static inline void Abc_TtConst0( word * pIn1, int nWords ) { int w; for ( w = 0; w < nWords; w++ ) pIn1[w] = 0; } static inline void Abc_TtConst1( word * pIn1, int nWords ) { int w; for ( w = 0; w < nWords; w++ ) pIn1[w] = ~(word)0; } /**Function************************************************************* Synopsis [Compute elementary truth tables.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline void Abc_TtElemInit( word ** pTtElems, int nVars ) { int i, k, nWords = Abc_TtWordNum( nVars ); for ( i = 0; i < nVars; i++ ) if ( i < 6 ) for ( k = 0; k < nWords; k++ ) pTtElems[i][k] = s_Truths6[i]; else for ( k = 0; k < nWords; k++ ) pTtElems[i][k] = (k & (1 << (i-6))) ? ~(word)0 : 0; } /**Function************************************************************* Synopsis [] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline word Abc_Tt6Cofactor0( word t, int iVar ) { assert( iVar >= 0 && iVar < 6 ); return (t &s_Truths6Neg[iVar]) | ((t &s_Truths6Neg[iVar]) << (1<= 0 && iVar < 6 ); return (t & s_Truths6[iVar]) | ((t & s_Truths6[iVar]) >> (1< 5 ) { word * pLimit = pIn + nWords; int i, iStep = Abc_TtWordNum(iVar); for ( ; pIn < pLimit; pIn += 2*iStep, pOut += 2*iStep ) for ( i = 0; i < iStep; i++ ) { pOut[i] = pIn[i]; pOut[i + iStep] = pIn[i]; } } } static inline void Abc_TtCofactor1p( word * pOut, word * pIn, int nWords, int iVar ) { if ( nWords == 1 ) pOut[0] = (pIn[0] & s_Truths6[iVar]) | ((pIn[0] & s_Truths6[iVar]) >> (1 << iVar)); else if ( iVar <= 5 ) { int w, shift = (1 << iVar); for ( w = 0; w < nWords; w++ ) pOut[w] = (pIn[w] & s_Truths6[iVar]) | ((pIn[w] & s_Truths6[iVar]) >> shift); } else // if ( iVar > 5 ) { word * pLimit = pIn + nWords; int i, iStep = Abc_TtWordNum(iVar); for ( ; pIn < pLimit; pIn += 2*iStep, pOut += 2*iStep ) for ( i = 0; i < iStep; i++ ) { pOut[i] = pIn[i + iStep]; pOut[i + iStep] = pIn[i + iStep]; } } } 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************************************************************* Synopsis [Checks pairs of cofactors w.r.t. two variables.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline int Abc_TtCheckEqualCofs( word * pTruth, int nWords, int iVar, int jVar, int Num1, int Num2 ) { assert( Num1 < Num2 && Num2 < 4 ); assert( iVar < jVar ); if ( nWords == 1 ) { word Mask = s_Truths6Neg[jVar] & s_Truths6Neg[iVar]; int shift1 = (Num1 >> 1) * (1 << jVar) + (Num1 & 1) * (1 << iVar); int shift2 = (Num2 >> 1) * (1 << jVar) + (Num2 & 1) * (1 << iVar); return ((pTruth[0] >> shift1) & Mask) == ((pTruth[0] >> shift2) & Mask); } if ( jVar <= 5 ) { word Mask = s_Truths6Neg[jVar] & s_Truths6Neg[iVar]; int shift1 = (Num1 >> 1) * (1 << jVar) + (Num1 & 1) * (1 << iVar); int shift2 = (Num2 >> 1) * (1 << jVar) + (Num2 & 1) * (1 << iVar); int w; for ( w = 0; w < nWords; w++ ) if ( ((pTruth[w] >> shift1) & Mask) != ((pTruth[w] >> shift2) & Mask) ) return 0; return 1; } if ( iVar <= 5 && jVar > 5 ) { word * pLimit = pTruth + nWords; int j, jStep = Abc_TtWordNum(jVar); int shift1 = (Num1 & 1) * (1 << iVar); int shift2 = (Num2 & 1) * (1 << iVar); int Offset1 = (Num1 >> 1) * jStep; int Offset2 = (Num2 >> 1) * jStep; for ( ; pTruth < pLimit; pTruth += 2*jStep ) for ( j = 0; j < jStep; j++ ) if ( ((pTruth[j + Offset1] >> shift1) & s_Truths6Neg[iVar]) != ((pTruth[j + Offset2] >> shift2) & s_Truths6Neg[iVar]) ) return 0; return 1; } { word * pLimit = pTruth + nWords; int j, jStep = Abc_TtWordNum(jVar); int i, iStep = Abc_TtWordNum(iVar); int Offset1 = (Num1 >> 1) * jStep + (Num1 & 1) * iStep; int Offset2 = (Num2 >> 1) * jStep + (Num2 & 1) * iStep; for ( ; pTruth < pLimit; pTruth += 2*jStep ) for ( i = 0; i < jStep; i += 2*iStep ) for ( j = 0; j < iStep; j++ ) if ( pTruth[Offset1 + i + j] != pTruth[Offset2 + i + j] ) return 0; return 1; } } /**Function************************************************************* Synopsis [] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline int Abc_Tt6Cof0IsConst0( word t, int iVar ) { return (t & s_Truths6Neg[iVar]) == 0; } static inline int Abc_Tt6Cof0IsConst1( word t, int iVar ) { return (t & s_Truths6Neg[iVar]) == s_Truths6Neg[iVar]; } static inline int Abc_Tt6Cof1IsConst0( word t, int iVar ) { return (t & s_Truths6[iVar]) == 0; } static inline int Abc_Tt6Cof1IsConst1( word t, int iVar ) { return (t & s_Truths6[iVar]) == s_Truths6[iVar]; } static inline int Abc_Tt6CofsOpposite( word t, int iVar ) { return (~t & s_Truths6Neg[iVar]) == ((t >> (1 << iVar)) & s_Truths6Neg[iVar]); } static inline int Abc_Tt6Cof0EqualCof1( word t1, word t2, int iVar ) { return (t1 & s_Truths6Neg[iVar]) == ((t2 >> (1 << iVar)) & s_Truths6Neg[iVar]); } static inline int Abc_Tt6Cof0EqualCof0( word t1, word t2, int iVar ) { return (t1 & s_Truths6Neg[iVar]) == (t2 & s_Truths6Neg[iVar]); } static inline int Abc_Tt6Cof1EqualCof1( word t1, word t2, int iVar ) { return (t1 & s_Truths6[iVar]) == (t2 & s_Truths6[iVar]); } /**Function************************************************************* Synopsis [] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline int Abc_TtTruthIsConst0( word * p, int nWords ) { int w; for ( w = 0; w < nWords; w++ ) if ( p[w] != 0 ) return 0; return 1; } static inline int Abc_TtTruthIsConst1( word * p, int nWords ) { int w; for ( w = 0; w < nWords; w++ ) if ( p[w] != ~(word)0 ) return 0; return 1; } static inline int Abc_TtCof0IsConst0( word * t, int nWords, int iVar ) { if ( iVar < 6 ) { int i; for ( i = 0; i < nWords; i++ ) if ( t[i] & s_Truths6Neg[iVar] ) return 0; return 1; } else { int i, Step = (1 << (iVar - 6)); word * tLimit = t + nWords; for ( ; t < tLimit; t += 2*Step ) for ( i = 0; i < Step; i++ ) if ( t[i] ) return 0; return 1; } } static inline int Abc_TtCof0IsConst1( word * t, int nWords, int iVar ) { if ( iVar < 6 ) { int i; for ( i = 0; i < nWords; i++ ) if ( (t[i] & s_Truths6Neg[iVar]) != s_Truths6Neg[iVar] ) return 0; return 1; } else { int i, Step = (1 << (iVar - 6)); word * tLimit = t + nWords; for ( ; t < tLimit; t += 2*Step ) for ( i = 0; i < Step; i++ ) if ( ~t[i] ) return 0; return 1; } } static inline int Abc_TtCof1IsConst0( word * t, int nWords, int iVar ) { if ( iVar < 6 ) { int i; for ( i = 0; i < nWords; i++ ) if ( t[i] & s_Truths6[iVar] ) return 0; return 1; } else { int i, Step = (1 << (iVar - 6)); word * tLimit = t + nWords; for ( ; t < tLimit; t += 2*Step ) for ( i = 0; i < Step; i++ ) if ( t[i+Step] ) return 0; return 1; } } static inline int Abc_TtCof1IsConst1( word * t, int nWords, int iVar ) { if ( iVar < 6 ) { int i; for ( i = 0; i < nWords; i++ ) if ( (t[i] & s_Truths6[iVar]) != s_Truths6[iVar] ) return 0; return 1; } else { int i, Step = (1 << (iVar - 6)); word * tLimit = t + nWords; for ( ; t < tLimit; t += 2*Step ) for ( i = 0; i < Step; i++ ) if ( ~t[i+Step] ) return 0; return 1; } } static inline int Abc_TtCofsOpposite( word * t, int nWords, int iVar ) { if ( iVar < 6 ) { int i, Shift = (1 << iVar); for ( i = 0; i < nWords; i++ ) if ( ((t[i] << Shift) & s_Truths6[iVar]) != (~t[i] & s_Truths6[iVar]) ) return 0; return 1; } else { int i, Step = (1 << (iVar - 6)); word * tLimit = t + nWords; for ( ; t < tLimit; t += 2*Step ) for ( i = 0; i < Step; i++ ) if ( t[i] != ~t[i+Step] ) return 0; return 1; } } /**Function************************************************************* Synopsis [Stretch truthtable to have more input variables.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline void Abc_TtStretch5( unsigned * pInOut, int nVarS, int nVarB ) { int w, i, step, nWords; if ( nVarS == nVarB ) return; assert( nVarS < nVarB ); step = Abc_TruthWordNum(nVarS); nWords = Abc_TruthWordNum(nVarB); if ( step == nWords ) return; assert( step < nWords ); for ( w = 0; w < nWords; w += step ) for ( i = 0; i < step; i++ ) pInOut[w + i] = pInOut[i]; } static inline void Abc_TtStretch6( word * pInOut, int nVarS, int nVarB ) { int w, i, step, nWords; if ( nVarS == nVarB ) return; assert( nVarS < nVarB ); step = Abc_Truth6WordNum(nVarS); nWords = Abc_Truth6WordNum(nVarB); if ( step == nWords ) return; assert( step < nWords ); for ( w = 0; w < nWords; w += step ) for ( i = 0; i < step; i++ ) pInOut[w + i] = pInOut[i]; } static inline word Abc_Tt6Stretch( word t, int nVars ) { assert( nVars >= 0 ); if ( nVars == 0 ) nVars++, t = (t & 0x1) | ((t & 0x1) << 1); if ( nVars == 1 ) nVars++, t = (t & 0x3) | ((t & 0x3) << 2); if ( nVars == 2 ) nVars++, t = (t & 0xF) | ((t & 0xF) << 4); if ( nVars == 3 ) nVars++, t = (t & 0xFF) | ((t & 0xFF) << 8); if ( nVars == 4 ) nVars++, t = (t & 0xFFFF) | ((t & 0xFFFF) << 16); if ( nVars == 5 ) nVars++, t = (t & 0xFFFFFFFF) | ((t & 0xFFFFFFFF) << 32); assert( nVars == 6 ); return t; } /**Function************************************************************* Synopsis [] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline int Abc_TtIsHexDigit( char HexChar ) { return (HexChar >= '0' && HexChar <= '9') || (HexChar >= 'A' && HexChar <= 'F') || (HexChar >= 'a' && HexChar <= 'f'); } static inline char Abc_TtPrintDigit( int Digit ) { assert( Digit >= 0 && Digit < 16 ); if ( Digit < 10 ) return '0' + Digit; return 'A' + Digit-10; } static inline int Abc_TtReadHexDigit( char HexChar ) { if ( HexChar >= '0' && HexChar <= '9' ) return HexChar - '0'; if ( HexChar >= 'A' && HexChar <= 'F' ) return HexChar - 'A' + 10; if ( HexChar >= 'a' && HexChar <= 'f' ) return HexChar - 'a' + 10; assert( 0 ); // not a hexadecimal symbol return -1; // return value which makes no sense } /**Function************************************************************* Synopsis [] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline void Abc_TtPrintHex( word * pTruth, int nVars ) { word * pThis, * pLimit = pTruth + Abc_TtWordNum(nVars); int k; assert( nVars >= 2 ); for ( pThis = pTruth; pThis < pLimit; pThis++ ) for ( k = 0; k < 16; k++ ) printf( "%c", Abc_TtPrintDigit((int)(pThis[0] >> (k << 2)) & 15) ); printf( "\n" ); } static inline void Abc_TtPrintHexRev( FILE * pFile, word * pTruth, int nVars ) { word * pThis; int k, StartK = nVars >= 6 ? 16 : (1 << (nVars - 2)); assert( nVars >= 2 ); for ( pThis = pTruth + Abc_TtWordNum(nVars) - 1; pThis >= pTruth; pThis-- ) for ( k = StartK - 1; k >= 0; k-- ) fprintf( pFile, "%c", Abc_TtPrintDigit((int)(pThis[0] >> (k << 2)) & 15) ); // printf( "\n" ); } static inline void Abc_TtPrintHexSpecial( word * pTruth, int nVars ) { word * pThis; int k; assert( nVars >= 2 ); for ( pThis = pTruth + Abc_TtWordNum(nVars) - 1; pThis >= pTruth; pThis-- ) for ( k = 0; k < 16; k++ ) printf( "%c", Abc_TtPrintDigit((int)(pThis[0] >> (k << 2)) & 15) ); printf( "\n" ); } static inline int Abc_TtWriteHexRev( char * pStr, word * pTruth, int nVars ) { word * pThis; char * pStrInit = pStr; int k, StartK = nVars >= 6 ? 16 : (1 << (nVars - 2)); assert( nVars >= 2 ); for ( pThis = pTruth + Abc_TtWordNum(nVars) - 1; pThis >= pTruth; pThis-- ) for ( k = StartK - 1; k >= 0; k-- ) *pStr++ = Abc_TtPrintDigit( (int)(pThis[0] >> (k << 2)) & 15 ); return pStr - pStrInit; } /**Function************************************************************* Synopsis [Reads hex truth table from a string.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline int Abc_TtReadHex( word * pTruth, char * pString ) { int k, nVars, Digit, nDigits; // skip the first 2 symbols if they are "0x" if ( pString[0] == '0' && pString[1] == 'x' ) pString += 2; // count the number of hex digits nDigits = 0; for ( k = 0; Abc_TtIsHexDigit(pString[k]); k++ ) nDigits++; if ( nDigits == 1 ) { if ( pString[0] == '0' || pString[0] == 'F' ) { pTruth[0] = (pString[0] == '0') ? 0 : ~(word)0; return 0; } if ( pString[0] == '5' || pString[0] == 'A' ) { pTruth[0] = (pString[0] == '5') ? s_Truths6Neg[0] : s_Truths6[0]; return 1; } } // determine the number of variables nVars = 2 + Abc_Base2Log( nDigits ); // clean storage for ( k = Abc_TtWordNum(nVars) - 1; k >= 0; k-- ) pTruth[k] = 0; // read hexadecimal digits in the reverse order // (the last symbol in the string is the least significant digit) for ( k = 0; k < nDigits; k++ ) { Digit = Abc_TtReadHexDigit( pString[nDigits - 1 - k] ); assert( Digit >= 0 && Digit < 16 ); Abc_TtSetHex( pTruth, k, Digit ); } if ( nVars < 6 ) pTruth[0] = Abc_Tt6Stretch( pTruth[0], nVars ); return nVars; } /**Function************************************************************* Synopsis [] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline void Abc_TtPrintBinary( word * pTruth, int nVars ) { word * pThis, * pLimit = pTruth + Abc_TtWordNum(nVars); int k, Limit = Abc_MinInt( 64, (1 << nVars) ); assert( nVars >= 2 ); for ( pThis = pTruth; pThis < pLimit; pThis++ ) for ( k = 0; k < Limit; k++ ) printf( "%d", Abc_InfoHasBit( (unsigned *)pThis, k ) ); printf( "\n" ); } /**Function************************************************************* Synopsis [] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline int Abc_TtSuppFindFirst( int Supp ) { int i; assert( Supp > 0 ); for ( i = 0; i < 32; i++ ) if ( Supp & (1 << i) ) return i; return -1; } static inline int Abc_TtSuppOnlyOne( int Supp ) { if ( Supp == 0 ) return 0; return (Supp & (Supp-1)) == 0; } static inline int Abc_TtSuppIsMinBase( int Supp ) { assert( Supp > 0 ); return (Supp & (Supp+1)) == 0; } static inline int Abc_Tt6HasVar( word t, int iVar ) { return ((t >> (1<> Shift) & s_Truths6Neg[iVar]) != (t[i] & s_Truths6Neg[iVar]) ) return 1; return 0; } else { int i, Step = (1 << (iVar - 6)); word * tLimit = t + Abc_TtWordNum( nVars ); for ( ; t < tLimit; t += 2*Step ) for ( i = 0; i < Step; i++ ) if ( t[i] != t[Step+i] ) return 1; return 0; } } static inline int Abc_TtSupport( word * t, int nVars ) { int v, Supp = 0; for ( v = 0; v < nVars; v++ ) if ( Abc_TtHasVar( t, nVars, v ) ) Supp |= (1 << v); return Supp; } static inline int Abc_TtSupportSize( word * t, int nVars ) { int v, SuppSize = 0; for ( v = 0; v < nVars; v++ ) if ( Abc_TtHasVar( t, nVars, v ) ) SuppSize++; return SuppSize; } static inline int Abc_TtSupportAndSize( word * t, int nVars, int * pSuppSize ) { int v, Supp = 0; *pSuppSize = 0; for ( v = 0; v < nVars; v++ ) if ( Abc_TtHasVar( t, nVars, v ) ) Supp |= (1 << v), (*pSuppSize)++; return Supp; } static inline int Abc_Tt6SupportAndSize( word t, int nVars, int * pSuppSize ) { int v, Supp = 0; *pSuppSize = 0; assert( nVars <= 6 ); for ( v = 0; v < nVars; v++ ) if ( Abc_Tt6HasVar( t, v ) ) Supp |= (1 << v), (*pSuppSize)++; return Supp; } /**Function************************************************************* Synopsis [] Description [] SideEffects [] 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 ) pTruth[0] = ((pTruth[0] << (1 << iVar)) & 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] << shift) & 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++ ) ABC_SWAP( word, pTruth[i], pTruth[i + iStep] ); } } /**Function************************************************************* Synopsis [] Description [] SideEffects [] 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 s_PMasks[5][3] = { { ABC_CONST(0x9999999999999999), ABC_CONST(0x2222222222222222), ABC_CONST(0x4444444444444444) }, { ABC_CONST(0xC3C3C3C3C3C3C3C3), ABC_CONST(0x0C0C0C0C0C0C0C0C), ABC_CONST(0x3030303030303030) }, { ABC_CONST(0xF00FF00FF00FF00F), ABC_CONST(0x00F000F000F000F0), ABC_CONST(0x0F000F000F000F00) }, { ABC_CONST(0xFF0000FFFF0000FF), ABC_CONST(0x0000FF000000FF00), ABC_CONST(0x00FF000000FF0000) }, { ABC_CONST(0xFFFF00000000FFFF), ABC_CONST(0x00000000FFFF0000), ABC_CONST(0x0000FFFF00000000) } }; if ( iVar < 5 ) { int i, Shift = (1 << iVar); for ( i = 0; i < nWords; i++ ) 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 ) { unsigned * pTruthU = (unsigned *)pTruth; unsigned * pLimitU = (unsigned *)(pTruth + nWords); for ( ; pTruthU < pLimitU; pTruthU += 4 ) ABC_SWAP( unsigned, pTruthU[1], pTruthU[2] ); } else // if ( iVar > 5 ) { word * pLimit = pTruth + nWords; int i, iStep = Abc_TtWordNum(iVar); for ( ; pTruth < pLimit; pTruth += 4*iStep ) for ( i = 0; i < iStep; i++ ) 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 Ps_PMasks[5][6][3] = { { { ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000) }, // 0 0 { ABC_CONST(0x9999999999999999), ABC_CONST(0x2222222222222222), ABC_CONST(0x4444444444444444) }, // 0 1 { ABC_CONST(0xA5A5A5A5A5A5A5A5), ABC_CONST(0x0A0A0A0A0A0A0A0A), ABC_CONST(0x5050505050505050) }, // 0 2 { ABC_CONST(0xAA55AA55AA55AA55), ABC_CONST(0x00AA00AA00AA00AA), ABC_CONST(0x5500550055005500) }, // 0 3 { ABC_CONST(0xAAAA5555AAAA5555), ABC_CONST(0x0000AAAA0000AAAA), ABC_CONST(0x5555000055550000) }, // 0 4 { ABC_CONST(0xAAAAAAAA55555555), ABC_CONST(0x00000000AAAAAAAA), ABC_CONST(0x5555555500000000) } // 0 5 }, { { ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000) }, // 1 0 { ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000) }, // 1 1 { ABC_CONST(0xC3C3C3C3C3C3C3C3), ABC_CONST(0x0C0C0C0C0C0C0C0C), ABC_CONST(0x3030303030303030) }, // 1 2 { ABC_CONST(0xCC33CC33CC33CC33), ABC_CONST(0x00CC00CC00CC00CC), ABC_CONST(0x3300330033003300) }, // 1 3 { ABC_CONST(0xCCCC3333CCCC3333), ABC_CONST(0x0000CCCC0000CCCC), ABC_CONST(0x3333000033330000) }, // 1 4 { ABC_CONST(0xCCCCCCCC33333333), ABC_CONST(0x00000000CCCCCCCC), ABC_CONST(0x3333333300000000) } // 1 5 }, { { ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000) }, // 2 0 { ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000) }, // 2 1 { ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000) }, // 2 2 { ABC_CONST(0xF00FF00FF00FF00F), ABC_CONST(0x00F000F000F000F0), ABC_CONST(0x0F000F000F000F00) }, // 2 3 { ABC_CONST(0xF0F00F0FF0F00F0F), ABC_CONST(0x0000F0F00000F0F0), ABC_CONST(0x0F0F00000F0F0000) }, // 2 4 { ABC_CONST(0xF0F0F0F00F0F0F0F), ABC_CONST(0x00000000F0F0F0F0), ABC_CONST(0x0F0F0F0F00000000) } // 2 5 }, { { ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000) }, // 3 0 { ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000) }, // 3 1 { ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000) }, // 3 2 { ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000) }, // 3 3 { ABC_CONST(0xFF0000FFFF0000FF), ABC_CONST(0x0000FF000000FF00), ABC_CONST(0x00FF000000FF0000) }, // 3 4 { ABC_CONST(0xFF00FF0000FF00FF), ABC_CONST(0x00000000FF00FF00), ABC_CONST(0x00FF00FF00000000) } // 3 5 }, { { ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000) }, // 4 0 { ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000) }, // 4 1 { ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000) }, // 4 2 { ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000) }, // 4 3 { ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000), ABC_CONST(0x0000000000000000) }, // 4 4 { ABC_CONST(0xFFFF00000000FFFF), ABC_CONST(0x00000000FFFF0000), ABC_CONST(0x0000FFFF00000000) } // 4 5 } }; if ( iVar == jVar ) return; if ( jVar < iVar ) ABC_SWAP( int, iVar, jVar ); assert( iVar < jVar && jVar < nVars ); if ( nVars <= 6 ) { word * s_PMasks = Ps_PMasks[iVar][jVar]; int shift = (1 << jVar) - (1 << iVar); pTruth[0] = (pTruth[0] & s_PMasks[0]) | ((pTruth[0] & s_PMasks[1]) << shift) | ((pTruth[0] & s_PMasks[2]) >> shift); return; } if ( jVar <= 5 ) { 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] & s_PMasks[0]) | ((pTruth[w] & s_PMasks[1]) << shift) | ((pTruth[w] & s_PMasks[2]) >> shift); return; } if ( iVar <= 5 && jVar > 5 ) { word low2High, high2Low; word * pLimit = pTruth + Abc_TtWordNum(nVars); int j, jStep = Abc_TtWordNum(jVar); int shift = 1 << iVar; for ( ; pTruth < pLimit; pTruth += 2*jStep ) for ( j = 0; j < jStep; j++ ) { low2High = (pTruth[j] & s_Truths6[iVar]) >> shift; high2Low = (pTruth[j+jStep] << shift) & s_Truths6[iVar]; pTruth[j] = (pTruth[j] & ~s_Truths6[iVar]) | high2Low; pTruth[j+jStep] = (pTruth[j+jStep] & s_Truths6[iVar]) | low2High; } return; } { word * pLimit = pTruth + Abc_TtWordNum(nVars); int i, iStep = Abc_TtWordNum(iVar); int j, jStep = Abc_TtWordNum(jVar); for ( ; pTruth < pLimit; pTruth += 2*jStep ) for ( i = 0; i < jStep; i += 2*iStep ) for ( j = 0; j < iStep; j++ ) ABC_SWAP( word, pTruth[iStep + i + j], pTruth[jStep + i + j] ); return; } } /**Function************************************************************* Synopsis [Support minimization.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline void Abc_TtShrink( word * pF, int nVars, int nVarsAll, unsigned Phase ) { int i, k, Var = 0; assert( nVarsAll <= 16 ); for ( i = 0; i < nVarsAll; i++ ) if ( Phase & (1 << i) ) { for ( k = i-1; k >= Var; k-- ) Abc_TtSwapAdjacent( pF, Abc_TtWordNum(nVarsAll), k ); Var++; } assert( Var == nVars ); } static inline int Abc_TtMinimumBase( word * t, int * pSupp, int nVarsAll, int * pnVars ) { int v, iVar = 0, uSupp = 0; assert( nVarsAll <= 16 ); for ( v = 0; v < nVarsAll; v++ ) if ( Abc_TtHasVar( t, nVarsAll, v ) ) { uSupp |= (1 << v); if ( pSupp ) pSupp[iVar] = pSupp[v]; iVar++; } if ( pnVars ) *pnVars = iVar; if ( uSupp == 0 || Abc_TtSuppIsMinBase( uSupp ) ) return 0; Abc_TtShrink( t, iVar, nVarsAll, uSupp ); return 1; } /**Function************************************************************* Synopsis [Cut minimization.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline int Abc_TtMinBase( word * pTruth, int * pVars, int nVars ) { int i, k; for ( i = k = 0; i < nVars; i++ ) { if ( !Abc_TtHasVar( pTruth, nVars, i ) ) continue; if ( k < i ) { pVars[k] = pVars[i]; Abc_TtSwapVars( pTruth, nVars, k, i ); } k++; } if ( k == nVars ) return k; assert( k < nVars ); // assert( k == Abc_TtSupportSize(pTruth, nVars) ); return k; } static inline void Abc_TtStretch( word * pTruth0, int nVars, int * pCut0, int nCutSize0, int * pCut, int nCutSize ) { int i, k; for ( i = nCutSize - 1, k = nCutSize0 - 1; i >= 0 && k >= 0; i-- ) { if ( pCut[i] > pCut0[k] ) continue; assert( pCut[i] == pCut0[k] ); if ( k < i ) Abc_TtSwapVars( pTruth0, nVars, k, i ); k--; } assert( k == -1 ); } /**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 [] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline int Abc_TtCountOnesSlow( word t ) { t = (t & ABC_CONST(0x5555555555555555)) + ((t>> 1) & ABC_CONST(0x5555555555555555)); t = (t & ABC_CONST(0x3333333333333333)) + ((t>> 2) & ABC_CONST(0x3333333333333333)); t = (t & ABC_CONST(0x0F0F0F0F0F0F0F0F)) + ((t>> 4) & ABC_CONST(0x0F0F0F0F0F0F0F0F)); t = (t & ABC_CONST(0x00FF00FF00FF00FF)) + ((t>> 8) & ABC_CONST(0x00FF00FF00FF00FF)); t = (t & ABC_CONST(0x0000FFFF0000FFFF)) + ((t>>16) & ABC_CONST(0x0000FFFF0000FFFF)); return (t & ABC_CONST(0x00000000FFFFFFFF)) + (t>>32); } static inline int Abc_TtCountOnes( word x ) { x = x - ((x >> 1) & ABC_CONST(0x5555555555555555)); x = (x & ABC_CONST(0x3333333333333333)) + ((x >> 2) & ABC_CONST(0x3333333333333333)); x = (x + (x >> 4)) & ABC_CONST(0x0F0F0F0F0F0F0F0F); x = x + (x >> 8); x = x + (x >> 16); x = x + (x >> 32); return (int)(x & 0xFF); } /**Function************************************************************* Synopsis [] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline int Abc_Tt6FirstBit( word t ) { int n = 0; if ( t == 0 ) return -1; if ( (t & 0x00000000FFFFFFFF) == 0 ) { n += 32; t >>= 32; } if ( (t & 0x000000000000FFFF) == 0 ) { n += 16; t >>= 16; } if ( (t & 0x00000000000000FF) == 0 ) { n += 8; t >>= 8; } if ( (t & 0x000000000000000F) == 0 ) { n += 4; t >>= 4; } if ( (t & 0x0000000000000003) == 0 ) { n += 2; t >>= 2; } if ( (t & 0x0000000000000001) == 0 ) { n++; } return n; } static inline int Abc_Tt6LastBit( word t ) { int n = 0; if ( t == 0 ) return -1; if ( (t & 0xFFFFFFFF00000000) == 0 ) { n += 32; t <<= 32; } if ( (t & 0xFFFF000000000000) == 0 ) { n += 16; t <<= 16; } if ( (t & 0xFF00000000000000) == 0 ) { n += 8; t <<= 8; } if ( (t & 0xF000000000000000) == 0 ) { n += 4; t <<= 4; } if ( (t & 0xC000000000000000) == 0 ) { n += 2; t <<= 2; } if ( (t & 0x8000000000000000) == 0 ) { n++; } return 63-n; } static inline int Abc_TtFindFirstBit( word * pIn, int nVars ) { int w, nWords = Abc_TtWordNum(nVars); for ( w = 0; w < nWords; w++ ) if ( pIn[w] ) return 64*w + Abc_Tt6FirstBit(pIn[w]); return -1; } static inline int Abc_TtFindFirstZero( word * pIn, int nVars ) { int w, nWords = Abc_TtWordNum(nVars); for ( w = 0; w < nWords; w++ ) if ( ~pIn[w] ) return 64*w + Abc_Tt6FirstBit(~pIn[w]); return -1; } static inline int Abc_TtFindLastBit( word * pIn, int nVars ) { int w, nWords = Abc_TtWordNum(nVars); for ( w = nWords - 1; w >= 0; w-- ) if ( pIn[w] ) return 64*w + Abc_Tt6LastBit(pIn[w]); return -1; } static inline int Abc_TtFindLastZero( word * pIn, int nVars ) { int w, nWords = Abc_TtWordNum(nVars); for ( w = nWords - 1; w >= 0; w-- ) if ( ~pIn[w] ) return 64*w + Abc_Tt6LastBit(~pIn[w]); return -1; } /**Function************************************************************* Synopsis [] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline void Abc_TtReverseVars( word * pTruth, int nVars ) { int k; for ( k = 0; k < nVars/2 ; k++ ) Abc_TtSwapVars( pTruth, nVars, k, nVars - 1 - k ); } static inline void Abc_TtReverseBits( word * pTruth, int nVars ) { static unsigned char pMirror[256] = { 0, 128, 64, 192, 32, 160, 96, 224, 16, 144, 80, 208, 48, 176, 112, 240, 8, 136, 72, 200, 40, 168, 104, 232, 24, 152, 88, 216, 56, 184, 120, 248, 4, 132, 68, 196, 36, 164, 100, 228, 20, 148, 84, 212, 52, 180, 116, 244, 12, 140, 76, 204, 44, 172, 108, 236, 28, 156, 92, 220, 60, 188, 124, 252, 2, 130, 66, 194, 34, 162, 98, 226, 18, 146, 82, 210, 50, 178, 114, 242, 10, 138, 74, 202, 42, 170, 106, 234, 26, 154, 90, 218, 58, 186, 122, 250, 6, 134, 70, 198, 38, 166, 102, 230, 22, 150, 86, 214, 54, 182, 118, 246, 14, 142, 78, 206, 46, 174, 110, 238, 30, 158, 94, 222, 62, 190, 126, 254, 1, 129, 65, 193, 33, 161, 97, 225, 17, 145, 81, 209, 49, 177, 113, 241, 9, 137, 73, 201, 41, 169, 105, 233, 25, 153, 89, 217, 57, 185, 121, 249, 5, 133, 69, 197, 37, 165, 101, 229, 21, 149, 85, 213, 53, 181, 117, 245, 13, 141, 77, 205, 45, 173, 109, 237, 29, 157, 93, 221, 61, 189, 125, 253, 3, 131, 67, 195, 35, 163, 99, 227, 19, 147, 83, 211, 51, 179, 115, 243, 11, 139, 75, 203, 43, 171, 107, 235, 27, 155, 91, 219, 59, 187, 123, 251, 7, 135, 71, 199, 39, 167, 103, 231, 23, 151, 87, 215, 55, 183, 119, 247, 15, 143, 79, 207, 47, 175, 111, 239, 31, 159, 95, 223, 63, 191, 127, 255 }; unsigned char Temp, * pTruthC = (unsigned char *)pTruth; int i, nBytes = (nVars > 6) ? (1 << (nVars - 3)) : 8; for ( i = 0; i < nBytes/2; i++ ) { Temp = pMirror[pTruthC[i]]; pTruthC[i] = pMirror[pTruthC[nBytes-1-i]]; pTruthC[nBytes-1-i] = Temp; } } /**Function************************************************************* Synopsis [Computes ISOP for 6 variables or less.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline word Abc_Tt6Isop( word uOn, word uOnDc, int nVars ) { word uOn0, uOn1, uOnDc0, uOnDc1, uRes0, uRes1, uRes2; int Var; assert( nVars <= 5 ); assert( (uOn & ~uOnDc) == 0 ); if ( uOn == 0 ) return 0; if ( uOnDc == ~(word)0 ) return ~(word)0; assert( nVars > 0 ); // find the topmost var for ( Var = nVars-1; Var >= 0; Var-- ) if ( Abc_Tt6HasVar( uOn, Var ) || Abc_Tt6HasVar( uOnDc, Var ) ) break; assert( Var >= 0 ); // cofactor uOn0 = Abc_Tt6Cofactor0( uOn, Var ); uOn1 = Abc_Tt6Cofactor1( uOn , Var ); uOnDc0 = Abc_Tt6Cofactor0( uOnDc, Var ); uOnDc1 = Abc_Tt6Cofactor1( uOnDc, Var ); // solve for cofactors uRes0 = Abc_Tt6Isop( uOn0 & ~uOnDc1, uOnDc0, Var ); uRes1 = Abc_Tt6Isop( uOn1 & ~uOnDc0, uOnDc1, Var ); uRes2 = Abc_Tt6Isop( (uOn0 & ~uRes0) | (uOn1 & ~uRes1), uOnDc0 & uOnDc1, Var ); // derive the final truth table uRes2 |= (uRes0 & s_Truths6Neg[Var]) | (uRes1 & s_Truths6[Var]); assert( (uOn & ~uRes2) == 0 ); assert( (uRes2 & ~uOnDc) == 0 ); return uRes2; } /*=== utilTruth.c ===========================================================*/ ABC_NAMESPACE_HEADER_END #endif //////////////////////////////////////////////////////////////////////// /// END OF FILE /// ////////////////////////////////////////////////////////////////////////