/**CFile**************************************************************** FileName [dauNonDsd.c] SystemName [ABC: Logic synthesis and verification system.] PackageName [DAG-aware unmapping.] Synopsis [] Author [Alan Mishchenko] Affiliation [UC Berkeley] Date [Ver. 1.0. Started - June 20, 2005.] Revision [$Id: dauNonDsd.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $] ***********************************************************************/ #include "dauInt.h" #include "misc/util/utilTruth.h" #include "misc/extra/extra.h" ABC_NAMESPACE_IMPL_START //////////////////////////////////////////////////////////////////////// /// DECLARATIONS /// //////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////// /// FUNCTION DEFINITIONS /// //////////////////////////////////////////////////////////////////////// /**Function************************************************************* Synopsis [Checks decomposability with given variable set.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ int Dau_DecCheckSetTop5( word * p, int nVars, int nVarsF, int nVarsB, int nVarsS, int uMaskS, int * pSched, word * pDec, word * pComp ) { word Cof[2][64], Value; word MaskFF = (((word)1) << (1 << nVarsF)) - 1; int ShiftF = 6 - nVarsF, MaskF = (1 << ShiftF) - 1; int pVarsS[16], pVarsB[16]; int nMints = (1 << nVarsB); int nMintsB = (1 <<(nVarsB-nVarsS)); int nMintsS = (1 << nVarsS); int s, b, v, m, Mint, MintB, MintS; assert( nVars == nVarsB + nVarsF ); assert( nVars <= 16 ); assert( nVarsS <= 6 ); assert( nVarsF >= 1 && nVarsF <= 5 ); // collect bound/shared variables for ( s = b = v = 0; v < nVarsB; v++ ) if ( (uMaskS >> v) & 1 ) pVarsB[v] = -1, pVarsS[v] = s++; else pVarsS[v] = -1, pVarsB[v] = b++; assert( s == nVarsS ); assert( b == nVarsB-nVarsS ); // clean minterm storage for ( s = 0; s < nMintsS; s++ ) Cof[0][s] = Cof[1][s] = ~(word)0; // iterate through bound set minters for ( MintS = MintB = Mint = m = 0; m < nMints; m++ ) { // find minterm value Value = (p[Mint>>ShiftF] >> ((Mint&MaskF)<>6] |= (((word)1)<<(iMintB & 63)); } } else return 0; // find next minterm v = pSched[m]; Mint ^= (1 << v); if ( (uMaskS >> v) & 1 ) // shared variable MintS ^= (1 << pVarsS[v]); else MintB ^= (1 << pVarsB[v]); } // create composition function if ( pComp ) { for ( s = 0; s < nMintsS; s++ ) { pComp[s>>ShiftF] |= (Cof[0][s] << ((s&MaskF) << nVarsF)); if ( ~Cof[1][s] ) pComp[(s+nMintsS)>>ShiftF] |= (Cof[1][s] << (((s+nMintsS)&MaskF) << nVarsF)); else pComp[(s+nMintsS)>>ShiftF] |= (Cof[0][s] << (((s+nMintsS)&MaskF) << nVarsF)); } if ( nVarsF + nVarsS + 1 < 6 ) pComp[0] = Abc_Tt6Stretch( pComp[0], nVarsF + nVarsS + 1 ); } if ( pDec && nVarsB < 6 ) pDec[0] = Abc_Tt6Stretch( pDec[0], nVarsB ); return 1; } int Dau_DecCheckSetTop6( word * p, int nVars, int nVarsF, int nVarsB, int nVarsS, int uMaskS, int * pSched, word * pDec, word * pComp ) { word * Cof[2][64]; int nWordsF = Abc_TtWordNum(nVarsF); int pVarsS[16], pVarsB[16]; int nMints = (1 << nVarsB); int nMintsB = (1 <<(nVarsB-nVarsS)); int nMintsS = (1 << nVarsS); int s, b, v, m, Mint, MintB, MintS; assert( nVars == nVarsB + nVarsF ); assert( nVars <= 16 ); assert( nVarsS <= 6 ); assert( nVarsF >= 6 ); // collect bound/shared variables for ( s = b = v = 0; v < nVarsB; v++ ) if ( (uMaskS >> v) & 1 ) pVarsB[v] = -1, pVarsS[v] = s++; else pVarsS[v] = -1, pVarsB[v] = b++; assert( s == nVarsS ); assert( b == nVarsB-nVarsS ); // clean minterm storage for ( s = 0; s < nMintsS; s++ ) Cof[0][s] = Cof[1][s] = NULL; // iterate through bound set minters for ( MintS = MintB = Mint = m = 0; m < nMints; m++ ) { // check if this cof already appeared if ( !Cof[0][MintS] || !memcmp(Cof[0][MintS], p + Mint * nWordsF, sizeof(word) * nWordsF) ) Cof[0][MintS] = p + Mint * nWordsF; else if ( !Cof[1][MintS] || !memcmp(Cof[1][MintS], p + Mint * nWordsF, sizeof(word) * nWordsF) ) { Cof[1][MintS] = p + Mint * nWordsF; if ( pDec ) { int iMintB = MintS * nMintsB + MintB; pDec[iMintB>>6] |= (((word)1)<<(iMintB & 63)); } } else return 0; // find next minterm v = pSched[m]; Mint ^= (1 << v); if ( (uMaskS >> v) & 1 ) // shared variable MintS ^= (1 << pVarsS[v]); else MintB ^= (1 << pVarsB[v]); } // create composition function if ( pComp ) { for ( s = 0; s < nMintsS; s++ ) { memcpy( pComp + s * nWordsF, Cof[0][s], sizeof(word) * nWordsF ); if ( Cof[1][s] ) memcpy( pComp + (s+nMintsS) * nWordsF, Cof[1][s], sizeof(word) * nWordsF ); else memcpy( pComp + (s+nMintsS) * nWordsF, Cof[0][s], sizeof(word) * nWordsF ); } } if ( pDec && nVarsB < 6 ) pDec[0] = Abc_Tt6Stretch( pDec[0], nVarsB ); return 1; } static inline int Dau_DecCheckSetTop( word * p, int nVars, int nVarsF, int nVarsB, int nVarsS, int uMaskS, int * pSched, word * pDec, word * pComp ) { if ( nVarsF < 6 ) return Dau_DecCheckSetTop5( p, nVars, nVarsF, nVarsB, nVarsS, uMaskS, pSched, pDec, pComp ); else return Dau_DecCheckSetTop6( p, nVars, nVarsF, nVarsB, nVarsS, uMaskS, pSched, pDec, pComp ); } /**Function************************************************************* Synopsis [Checks decomposability with given BS variables.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline void Dau_DecGetMinterm( word * p, int g, int nVarsS, int uMaskAll ) { int m, c, v; for ( m = c = v = 0; v < nVarsS; v++ ) if ( !((uMaskAll >> v) & 1) ) // not shared bound set variable { if ( (g >> v) & 1 ) m |= (1 << c); c++; } assert( c >= 2 ); p[m>>6] |= (((word)1)<<(m & 63)); } static inline int Dau_DecCheckSet5( word * p, int nVars, int nVarsF, int uMaskAll, int uMaskValue, word * pCof0, word * pCof1, word * pDec ) { int fFound0 = 0, fFound1 = 0; int g, gMax = (1 << (nVars - nVarsF)); int Shift = 6 - nVarsF, Mask = (1 << Shift) - 1; word Mask2 = (((word)1) << (1 << nVarsF)) - 1; word Cof0 = 0, Cof1 = 0, Value; assert( nVarsF >= 1 && nVarsF <= 5 ); if ( pDec ) *pDec = 0; for ( g = 0; g < gMax; g++ ) if ( (g & uMaskAll) == uMaskValue ) // this minterm g matches shared variable minterm uMaskValue { Value = (p[g>>Shift] >> ((g&Mask)<= 6 && nVarsF <= nVars - 2 ); if ( pDec ) *pDec = 0; for ( g = 0; g < gMax; g++ ) if ( (g & uMaskAll) == uMaskValue ) { if ( !fFound0 ) Cof0 = p + g * nWords, fFound0 = 1; else if ( !memcmp(Cof0, p + g * nWords, sizeof(word) * nWords) ) continue; else if ( !fFound1 ) { Cof1 = p + g * nWords, fFound1 = 1; if ( pDec ) Dau_DecGetMinterm( pDec, g, nVars-nVarsF, uMaskAll ); } else if ( !memcmp(Cof1, p + g * nWords, sizeof(word) * nWords) ) { if ( pDec ) Dau_DecGetMinterm( pDec, g, nVars-nVarsF, uMaskAll ); continue; } else return 0; } if ( pCof0 ) { assert( fFound0 ); Cof1 = fFound1 ? Cof1 : Cof0; memcpy( pCof0, Cof0, sizeof(word) * nWords ); memcpy( pCof1, Cof1, sizeof(word) * nWords ); } return 1; } static inline int Dau_DecCheckSetAny( word * p, int nVars, int nVarsF, int uMaskAll, int uMaskValue, word * pCof0, word * pCof1, word * pDec ) { assert( nVarsF >= 1 && nVarsF <= nVars - 2 ); if ( nVarsF < 6 ) return Dau_DecCheckSet5( p, nVars, nVarsF, uMaskAll, uMaskValue, pCof0, pCof1, pDec ); else return Dau_DecCheckSet6( p, nVars, nVarsF, uMaskAll, uMaskValue, pCof0, pCof1, pDec ); } int Dau_DecCheckSetTopOld( word * p, int nVars, int nVarsF, int nVarsB, int nVarsS, int maskS, word ** pCof0, word ** pCof1, word ** pDec ) { int i, pVarsS[16]; int v, m, mMax = (1 << nVarsS), uMaskValue; assert( nVars >= 3 && nVars <= 16 ); assert( nVars == nVarsF + nVarsB ); assert( nVarsF >= 1 && nVarsF <= nVars - 2 ); assert( nVarsB >= 2 && nVarsB <= nVars - 1 ); assert( nVarsS >= 0 && nVarsS <= nVarsB - 2 ); if ( nVarsS == 0 ) return Dau_DecCheckSetAny( p, nVars, nVarsF, 0, 0, pCof0? pCof0[0] : 0, pCof1? pCof1[0] : 0, pDec? pDec[0] : 0 ); // collect shared variables assert( maskS > 0 && maskS < (1 << nVarsB) ); for ( i = 0, v = 0; v < nVarsB; v++ ) if ( (maskS >> v) & 1 ) pVarsS[i++] = v; assert( i == nVarsS ); // go through shared set minterms for ( m = 0; m < mMax; m++ ) { // generate share set mask uMaskValue = 0; for ( v = 0; v < nVarsS; v++ ) if ( (m >> v) & 1 ) uMaskValue |= (1 << pVarsS[v]); assert( (maskS & uMaskValue) == uMaskValue ); // check decomposition if ( !Dau_DecCheckSetAny( p, nVars, nVarsF, maskS, uMaskValue, pCof0? pCof0[m] : 0, pCof1? pCof1[m] : 0, pDec? pDec[m] : 0 ) ) return 0; } return 1; } /**Function************************************************************* Synopsis [Variable sets.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ static inline unsigned Dau_DecCreateSet( int * pVarsB, int sizeB, int maskS ) { unsigned uSet = 0; int v; for ( v = 0; v < sizeB; v++ ) { uSet |= (1 << (pVarsB[v] << 1)); if ( (maskS >> v) & 1 ) uSet |= (1 << ((pVarsB[v] << 1)+1)); } return uSet; } static inline int Dau_DecSetHas01( unsigned Mask ) { return (Mask & ((~Mask) >> 1) & 0x55555555); } static inline int Dau_DecSetIsContained( Vec_Int_t * vSets, unsigned New ) // Old=abcD contains New=abcDE // Old=abcD contains New=abCD { unsigned Old; int i, Entry; Vec_IntForEachEntry( vSets, Entry, i ) { Old = (unsigned)Entry; if ( (Old & ~New) == 0 && !Dau_DecSetHas01(~Old & New)) return 1; } return 0; } void Dau_DecSortSet( unsigned set, int nVars, int * pnUnique, int * pnShared, int * pnFree ) { int v; int nUnique = 0, nShared = 0, nFree = 0; for ( v = 0; v < nVars; v++ ) { int Value = ((set >> (v << 1)) & 3); if ( Value == 1 ) nUnique++; else if ( Value == 3 ) nShared++; else if ( Value == 0 ) nFree++; else assert( 0 ); } *pnUnique = nUnique; *pnShared = nShared; *pnFree = nFree; } void Dau_DecPrintSet( unsigned set, int nVars, int fNewLine ) { int v, Counter = 0; int nUnique = 0, nShared = 0, nFree = 0; Dau_DecSortSet( set, nVars, &nUnique, &nShared, &nFree ); printf( "S =%2d D =%2d C =%2d ", nShared, nUnique+nShared, nShared+nFree+1 ); printf( "x=" ); for ( v = 0; v < nVars; v++ ) { int Value = ((set >> (v << 1)) & 3); if ( Value == 1 ) printf( "%c", 'a' + v ), Counter++; else if ( Value == 3 ) printf( "%c", 'A' + v ), Counter++; else assert( Value == 0 ); } printf( " y=x" ); for ( v = 0; v < nVars; v++ ) { int Value = ((set >> (v << 1)) & 3); if ( Value == 0 ) printf( "%c", 'a' + v ), Counter++; else if ( Value == 3 ) printf( "%c", 'A' + v ), Counter++; } for ( ; Counter < 15; Counter++ ) printf( " " ); if ( fNewLine ) printf( "\n" ); } unsigned Dau_DecReadSet( char * pStr ) { unsigned uSet = 0; int v; for ( v = 0; pStr[v]; v++ ) { if ( pStr[v] >= 'a' && pStr[v] <= 'z' ) uSet |= (1 << ((pStr[v] - 'a') << 1)); else if ( pStr[v] >= 'A' && pStr[v] <= 'Z' ) uSet |= (1 << ((pStr[v] - 'a') << 1)) | (1 << (((pStr[v] - 'a') << 1)+1)); else break; } return uSet; } void Dau_DecPrintSets( Vec_Int_t * vSets, int nVars ) { int i, Entry; printf( "The %d-variable set family contains %d sets:\n", nVars, Vec_IntSize(vSets) ); Vec_IntForEachEntry( vSets, Entry, i ) Dau_DecPrintSet( (unsigned)Entry, nVars, 1 ); printf( "\n" ); } /**Function************************************************************* Synopsis [Find decomposable bound-sets of the given function.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ void Dau_DecMoveFreeToLSB( word * p, int nVars, int * V2P, int * P2V, int maskB, int sizeB ) { int v, c = 0; for ( v = 0; v < nVars; v++ ) if ( !((maskB >> v) & 1) ) Abc_TtMoveVar( p, nVars, V2P, P2V, v, c++ ); assert( c == nVars - sizeB ); } Vec_Int_t * Dau_DecFindSets_int( word * pInit, int nVars, int * pSched[16] ) { Vec_Int_t * vSets = Vec_IntAlloc( 32 ); int V2P[16], P2V[16], pVarsB[16]; int Limit = (1 << nVars); int c, v, sizeB, sizeS, maskB, maskS; unsigned setMixed; word p[1<<10]; memcpy( p, pInit, sizeof(word) * Abc_TtWordNum(nVars) ); for ( v = 0; v < nVars; v++ ) assert( Abc_TtHasVar( p, nVars, v ) ); // initialize permutation for ( v = 0; v < nVars; v++ ) V2P[v] = P2V[v] = v; // iterate through bound sets of each size in increasing order for ( sizeB = 2; sizeB < nVars; sizeB++ ) // bound set size for ( maskB = 0; maskB < Limit; maskB++ ) // bound set if ( Abc_TtBitCount16(maskB) == sizeB ) { // permute variables to have bound set on top Dau_DecMoveFreeToLSB( p, nVars, V2P, P2V, maskB, sizeB ); // collect bound set vars on levels nVars-sizeB to nVars-1 for ( c = 0; c < sizeB; c++ ) pVarsB[c] = P2V[nVars-sizeB+c]; // check disjoint // if ( Dau_DecCheckSetTopOld(p, nVars, nVars-sizeB, sizeB, 0, 0, NULL, NULL, NULL) ) if ( Dau_DecCheckSetTop(p, nVars, nVars-sizeB, sizeB, 0, 0, pSched[sizeB], NULL, NULL) ) { Vec_IntPush( vSets, Dau_DecCreateSet(pVarsB, sizeB, 0) ); continue; } if ( sizeB == 2 ) continue; // iterate through shared sets of each size in the increasing order for ( sizeS = 1; sizeS <= sizeB - 2; sizeS++ ) // shared set size if ( sizeS <= 3 ) // sizeS = 1; for ( maskS = 0; maskS < (1 << sizeB); maskS++ ) // shared set if ( Abc_TtBitCount16(maskS) == sizeS ) { setMixed = Dau_DecCreateSet( pVarsB, sizeB, maskS ); // printf( "Considering %10d ", setMixed ); // Dau_DecPrintSet( setMixed, nVars ); // check if it exists if ( Dau_DecSetIsContained(vSets, setMixed) ) continue; // check if it can be added // if ( Dau_DecCheckSetTopOld(p, nVars, nVars-sizeB, sizeB, sizeS, maskS, NULL, NULL, NULL) ) if ( Dau_DecCheckSetTop(p, nVars, nVars-sizeB, sizeB, sizeS, maskS, pSched[sizeB], NULL, NULL) ) Vec_IntPush( vSets, setMixed ); } } return vSets; } Vec_Int_t * Dau_DecFindSets( word * pInit, int nVars ) { Vec_Int_t * vSets; int v, * pSched[16] = {NULL}; for ( v = 2; v < nVars; v++ ) pSched[v] = Extra_GreyCodeSchedule( v ); vSets = Dau_DecFindSets_int( pInit, nVars, pSched ); for ( v = 2; v < nVars; v++ ) ABC_FREE( pSched[v] ); return vSets; } void Dau_DecFindSetsTest2() { Vec_Int_t * vSets; word a0 = (~s_Truths6[1] & s_Truths6[2]) | (s_Truths6[1] & s_Truths6[3]); word a1 = (~s_Truths6[1] & s_Truths6[4]) | (s_Truths6[1] & s_Truths6[5]); word t = (~s_Truths6[0] & a0) | (s_Truths6[0] & a1); // word t = ABC_CONST(0x7EFFFFFFFFFFFF7E); // and(gam1,gam2) // word t = ABC_CONST(0xB0F0BBFFB0F0BAFE); // some funct // word t = ABC_CONST(0x2B0228022B022802); // 5-var non-dec0x0F7700000F770000 // word t = ABC_CONST(0x0F7700000F770000); // (!<(ab)cd>e) // word t = ABC_CONST(0x7F00000000000000); // (!(abc)def) int nVars = 5; vSets = Dau_DecFindSets( &t, nVars ); Dau_DecPrintSets( vSets, nVars ); Vec_IntFree( vSets ); } /**Function************************************************************* Synopsis [Replaces variables in the string.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ void Dau_DecVarReplace( char * pStr, int * pPerm, int nVars ) { int v; for ( v = 0; pStr[v]; v++ ) if ( pStr[v] >= 'a' && pStr[v] <= 'z' ) { assert( pStr[v] - 'a' < nVars ); pStr[v] = 'a' + pPerm[pStr[v] - 'a']; } } /**Function************************************************************* Synopsis [Decomposes with the given bound-set.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ int Dau_DecDecomposeSet( word * pInit, int nVars, unsigned uSet, word * pComp, word * pDec, int * pPermC, int * pPermD, int * pnVarsC, int * pnVarsD, int * pnVarsS ) { word p[1<<13], Cof[64], Cof0[64], Cof1[64], Decs[64]; word * pCof0[64], * pCof1[64], * pDecs[64], MintC, MintD; int V2P[16], P2V[16], pVarsU[16], pVarsS[16], pVarsF[16]; int nVarsU = 0, nVarsS = 0, nVarsF = 0; int nWords = Abc_TtWordNum(nVars); int v, d, c, Status, nDecs; assert( nVars <= 16 ); for ( v = 0; v < nVars; v++ ) V2P[v] = P2V[v] = v; memcpy( p, pInit, sizeof(word) * nWords ); // sort variables for ( v = 0; v < nVars; v++ ) { int Value = (uSet >> (v<<1)) & 3; if ( Value == 0 ) pVarsF[nVarsF++] = v; else if ( Value == 1 ) pVarsU[nVarsU++] = v; else if ( Value == 3 ) pVarsS[nVarsS++] = v; else assert(0); } assert( nVarsS >= 0 && nVarsS <= 6 ); assert( nVarsF + nVarsS + 1 <= 6 ); assert( nVarsU + nVarsS <= 6 ); // init space for decomposition functions nDecs = (1 << nVarsS); for ( d = 0; d < nDecs; d++ ) { pCof0[d] = Cof0 + d; pCof1[d] = Cof1 + d; pDecs[d] = Decs + d; } // permute variables c = 0; for ( v = 0; v < nVarsF; v++ ) Abc_TtMoveVar( p, nVars, V2P, P2V, pVarsF[v], c++ ); for ( v = 0; v < nVarsS; v++ ) Abc_TtMoveVar( p, nVars, V2P, P2V, pVarsS[v], c++ ); for ( v = 0; v < nVarsU; v++ ) Abc_TtMoveVar( p, nVars, V2P, P2V, pVarsU[v], c++ ); assert( c == nVars ); // check decomposition Status = Dau_DecCheckSetTopOld( p, nVars, nVarsF, nVarsS+nVarsU, nVarsS, Abc_InfoMask(nVarsS), pCof0, pCof1, pDecs ); if ( !Status ) return 0; // compute cofactors assert( nVarsF + nVarsS < 6 ); for ( d = 0; d < nDecs; d++ ) { Cof[d] = (pCof1[d][0] & s_Truths6[nVarsF + nVarsS]) | (pCof0[d][0] & ~s_Truths6[nVarsF + nVarsS]); pDecs[d][0] = Abc_Tt6Stretch( pDecs[d][0], nVarsU ); } // compute the resulting functions pComp[0] = 0; pDec[0] = 0; for ( d = 0; d < nDecs; d++ ) { // compute minterms for composition/decomposition function MintC = MintD = ~((word)0); for ( v = 0; v < nVarsS; v++ ) { MintC &= ((d >> v) & 1) ? s_Truths6[nVarsF+v] : ~s_Truths6[nVarsF+v]; MintD &= ((d >> v) & 1) ? s_Truths6[nVarsU+v] : ~s_Truths6[nVarsU+v]; } // derive functions pComp[0] |= MintC & Cof[d]; pDec[0] |= MintD & pDecs[d][0]; } // derive variable permutations if ( pPermC ) { for ( v = 0; v < nVarsF; v++ ) pPermC[v] = pVarsF[v]; for ( v = 0; v < nVarsS; v++ ) pPermC[nVarsF+v] = pVarsS[v]; pPermC[nVarsF + nVarsS] = nVars; } if ( pPermD ) { for ( v = 0; v < nVarsU; v++ ) pPermD[v] = pVarsU[v]; for ( v = 0; v < nVarsS; v++ ) pPermD[nVarsU+v] = pVarsS[v]; } if ( pnVarsC ) *pnVarsC = nVarsF + nVarsS + 1; if ( pnVarsD ) *pnVarsD = nVarsU + nVarsS; if ( pnVarsS ) *pnVarsS = nVarsS; return 1; } /**Function************************************************************* Synopsis [Testing procedures.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ int Dau_DecVerify( word * pInit, int nVars, char * pDsdC, char * pDsdD ) { word pC[1<<13], pD[1<<13], pRes[1<<13]; // max = 16 int nWordsC = Abc_TtWordNum(nVars+1); int nWordsD = Abc_TtWordNum(nVars); assert( nVars < 16 ); memcpy( pC, Dau_DsdToTruth(pDsdC, nVars+1), sizeof(word) * nWordsC ); memcpy( pD, Dau_DsdToTruth(pDsdD, nVars), sizeof(word) * nWordsD ); if ( nVars >= 6 ) { assert( nWordsD >= 1 ); assert( nWordsC > 1 ); Abc_TtMux( pRes, pD, pC + nWordsD, pC, nWordsD ); } else { word pC0 = Abc_Tt6Stretch( pC[0], nVars ); word pC1 = Abc_Tt6Stretch( (pC[0] >> (1 << nVars)), nVars ); Abc_TtMux( pRes, pD, &pC1, &pC0, nWordsD ); } if ( !Abc_TtEqual(pInit, pRes, nWordsD) ) printf( " Verification failed" ); // else // printf( " Verification successful" ); printf( "\n" ); return 1; } int Dau_DecPerform6( word * p, int nVars, unsigned uSet ) { word tComp = 0, tDec = 0, tDec0, tComp0, tComp1, FuncC, FuncD; char pDsdC[1000], pDsdD[1000]; int pPermC[16], pPermD[16]; int nVarsC, nVarsD, nVarsS, nVarsU, nVarsF, nPairs; int i, m, v, status, ResC, ResD, Counter = 0; status = Dau_DecDecomposeSet( p, nVars, uSet, &tComp, &tDec0, pPermC, pPermD, &nVarsC, &nVarsD, &nVarsS ); if ( !status ) { printf( " Decomposition does not exist\n" ); return 0; } nVarsU = nVarsD - nVarsS; nVarsF = nVarsC - nVarsS - 1; tComp0 = Abc_Tt6Cofactor0( tComp, nVarsF + nVarsS ); tComp1 = Abc_Tt6Cofactor1( tComp, nVarsF + nVarsS ); nPairs = 1 << (1 << nVarsS); for ( i = 0; i < nPairs; i++ ) { if ( i & 1 ) continue; // create miterms with this polarity FuncC = FuncD = 0; for ( m = 0; m < (1 << nVarsS); m++ ) { word MintC, MintD; if ( !((i >> m) & 1) ) continue; MintC = MintD = ~(word)0; for ( v = 0; v < nVarsS; v++ ) { MintC &= ((m >> v) & 1) ? s_Truths6[nVarsF+v] : ~s_Truths6[nVarsF+v]; MintD &= ((m >> v) & 1) ? s_Truths6[nVarsU+v] : ~s_Truths6[nVarsU+v]; } FuncC |= MintC; FuncD |= MintD; } // uncomplement given variables tComp = (~s_Truths6[nVarsF + nVarsS] & ((tComp0 & ~FuncC) | (tComp1 & FuncC))) | (s_Truths6[nVarsF + nVarsS] & ((tComp1 & ~FuncC) | (tComp0 & FuncC))); tDec = tDec0 ^ FuncD; // decompose ResC = Dau_DsdDecompose( &tComp, nVarsC, 0, 1, pDsdC ); ResD = Dau_DsdDecompose( &tDec, nVarsD, 0, 1, pDsdD ); // replace variables Dau_DecVarReplace( pDsdD, pPermD, nVarsD ); Dau_DecVarReplace( pDsdC, pPermC, nVarsC ); // report // printf( " " ); printf( "%3d : ", Counter++ ); printf( "%24s ", pDsdD ); printf( "%24s ", pDsdC ); Dau_DecVerify( p, nVars, pDsdC, pDsdD ); } return 1; } int Dau_DecPerform( word * pInit, int nVars, unsigned uSet ) { word p[1<<10], pDec[1<<10], pComp[1<<10]; // at most 2^10 words char pDsdC[5000], pDsdD[5000]; // at most 2^12 hex digits int nVarsU, nVarsS, nVarsF, nVarsC = 0, nVarsD = 0; int V2P[16], P2V[16], pPermC[16], pPermD[16], * pSched; int v, i, status, ResC, ResD; int nWords = Abc_TtWordNum(nVars); assert( nVars <= 16 ); // backup the function memcpy( p, pInit, sizeof(word) * nWords ); // get variable numbers Dau_DecSortSet( uSet, nVars, &nVarsU, &nVarsS, &nVarsF ); // permute function and order variables for ( v = 0; v < nVars; v++ ) V2P[v] = P2V[v] = v; for ( i = v = 0; v < nVars; v++ ) if ( ((uSet >> (v<<1)) & 3) == 0 ) // free first Abc_TtMoveVar( p, nVars, V2P, P2V, v, i++ ), pPermC[nVarsC++] = v; for ( v = 0; v < nVars; v++ ) if ( ((uSet >> (v<<1)) & 3) == 3 ) // share second Abc_TtMoveVar( p, nVars, V2P, P2V, v, i++ ), pPermC[nVarsC++] = v; pPermC[nVarsC++] = nVars; for ( v = 0; v < nVars; v++ ) if ( ((uSet >> (v<<1)) & 3) == 1 ) // unique last Abc_TtMoveVar( p, nVars, V2P, P2V, v, i++ ), pPermD[nVarsD++] = v; for ( v = 0; v < nVarsS; v++ ) pPermD[nVarsD++] = pPermC[nVarsF+v]; assert( nVarsD == nVarsU + nVarsS ); assert( nVarsC == nVarsF + nVarsS + 1 ); assert( i == nVars ); // decompose pSched = Extra_GreyCodeSchedule( nVarsU + nVarsS ); memset( pDec, 0, sizeof(word) * Abc_TtWordNum(nVarsD) ); memset( pComp, 0, sizeof(word) * Abc_TtWordNum(nVarsC) ); status = Dau_DecCheckSetTop( p, nVars, nVarsF, nVarsU + nVarsS, nVarsS, nVarsS ? Abc_InfoMask(nVarsS) : 0, pSched, pDec, pComp ); ABC_FREE( pSched ); if ( !status ) { printf( " Decomposition does not exist\n" ); return 0; } // Dau_DsdPrintFromTruth( stdout, pC, nVars+1 ); //printf( "\n" ); // Dau_DsdPrintFromTruth( stdout, pD, nVars ); //printf( "\n" ); // Kit_DsdPrintFromTruth( (unsigned *)pComp, 6 ); printf( "\n" ); // Kit_DsdPrintFromTruth( (unsigned *)pDec, 6 ); printf( "\n" ); // decompose ResC = Dau_DsdDecompose( pComp, nVarsC, 0, 1, pDsdC ); ResD = Dau_DsdDecompose( pDec, nVarsD, 0, 1, pDsdD ); // replace variables Dau_DecVarReplace( pDsdD, pPermD, nVarsD ); Dau_DecVarReplace( pDsdC, pPermC, nVarsC ); // report printf( " " ); printf( "%3d : ", 0 ); printf( "%24s ", pDsdD ); printf( "%24s ", pDsdC ); Dau_DecVerify( pInit, nVars, pDsdC, pDsdD ); return 1; } void Dau_DecTrySets( word * pInit, int nVars, int fVerbose ) { Vec_Int_t * vSets; int i, Entry; assert( nVars <= 16 ); vSets = Dau_DecFindSets( pInit, nVars ); if ( !fVerbose ) { Vec_IntFree( vSets ); return; } Dau_DsdPrintFromTruth( pInit, nVars ); printf( "This %d-variable function has %d decomposable variable sets:\n", nVars, Vec_IntSize(vSets) ); Vec_IntForEachEntry( vSets, Entry, i ) { unsigned uSet = (unsigned)Entry; printf( "Set %4d : ", i ); if ( nVars > 6 ) { Dau_DecPrintSet( uSet, nVars, 0 ); Dau_DecPerform( pInit, nVars, uSet ); } else { Dau_DecPrintSet( uSet, nVars, 1 ); Dau_DecPerform6( pInit, nVars, uSet ); } } Vec_IntFree( vSets ); // printf( "\n" ); } void Dau_DecFindSetsTest3() { word a0 = (~s_Truths6[1] & s_Truths6[2]) | (s_Truths6[1] & s_Truths6[3]); word a1 = (~s_Truths6[1] & s_Truths6[4]) | (s_Truths6[1] & s_Truths6[5]); word t = (~s_Truths6[0] & a0) | (s_Truths6[0] & a1); // word t = ABC_CONST(0x0F7700000F770000); // (!<(ab)cd>e) int nVars = 6; char * pStr = "Bcd"; // char * pStr = "Abcd"; // char * pStr = "ab"; unsigned uSet = Dau_DecReadSet( pStr ); Dau_DecPerform6( &t, nVars, uSet ); } void Dau_DecFindSetsTest() { int nVars = 6; // word a0 = (~s_Truths6[1] & s_Truths6[2]) | (s_Truths6[1] & s_Truths6[3]); // word a1 = (~s_Truths6[1] & s_Truths6[4]) | (s_Truths6[1] & s_Truths6[5]); // word t = (~s_Truths6[0] & a0) | (s_Truths6[0] & a1); // word t = ABC_CONST(0x7EFFFFFFFFFFFF7E); // and(gam1,gam2) // word t = ABC_CONST(0xB0F0BBFFB0F0BAFE); // some funct // word t = ABC_CONST(0x00000000901FFFFF); // some funct word t = ABC_CONST(0x000030F00D0D3FFF); // some funct // word t = ABC_CONST(0x00000000690006FF); // some funct // word t = ABC_CONST(0x7000F80007FF0FFF); // some funct // word t = ABC_CONST(0x4133CB334133CB33); // some funct 5 var // word t = ABC_CONST(0x2B0228022B022802); // 5-var non-dec0x0F7700000F770000 // word t = ABC_CONST(0x0F7700000F770000); // (!<(ab)cd>e) // word t = ABC_CONST(0x7F00000000000000); // (!(abc)def) Dau_DecTrySets( &t, nVars, 1 ); } //////////////////////////////////////////////////////////////////////// /// END OF FILE /// //////////////////////////////////////////////////////////////////////// ABC_NAMESPACE_IMPL_END