/**CFile**************************************************************** FileName [giaAiger.c] SystemName [ABC: Logic synthesis and verification system.] PackageName [Scalable AIG package.] Synopsis [Procedures to read/write binary AIGER format developed by Armin Biere, Johannes Kepler University (http://fmv.jku.at/)] Author [Alan Mishchenko] Affiliation [UC Berkeley] Date [Ver. 1.0. Started - June 20, 2005.] Revision [$Id: giaAiger.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $] ***********************************************************************/ #include "gia.h" ABC_NAMESPACE_IMPL_START //////////////////////////////////////////////////////////////////////// /// DECLARATIONS /// //////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////// /// FUNCTION DEFINITIONS /// //////////////////////////////////////////////////////////////////////// /**Function************************************************************* Synopsis [Extracts one unsigned AIG edge from the input buffer.] Description [This procedure is a slightly modified version of Armin Biere's procedure "unsigned decode (FILE * file)". ] SideEffects [Updates the current reading position.] SeeAlso [] ***********************************************************************/ unsigned Gia_ReadAigerDecode( unsigned char ** ppPos ) { unsigned x = 0, i = 0; unsigned char ch; while ((ch = *(*ppPos)++) & 0x80) x |= (ch & 0x7f) << (7 * i++); return x | (ch << (7 * i)); } /**Function************************************************************* Synopsis [Decodes the encoded array of literals.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ Vec_Int_t * Gia_WriteDecodeLiterals( unsigned char ** ppPos, int nEntries ) { Vec_Int_t * vLits; int Lit, LitPrev, Diff, i; vLits = Vec_IntAlloc( nEntries ); LitPrev = Gia_ReadAigerDecode( ppPos ); Vec_IntPush( vLits, LitPrev ); for ( i = 1; i < nEntries; i++ ) { // Diff = Lit - LitPrev; // Diff = (Lit < LitPrev)? -Diff : Diff; // Diff = ((2 * Diff) << 1) | (int)(Lit < LitPrev); Diff = Gia_ReadAigerDecode( ppPos ); Diff = (Diff & 1)? -(Diff >> 1) : Diff >> 1; Lit = Diff + LitPrev; Vec_IntPush( vLits, Lit ); LitPrev = Lit; } return vLits; } /**Function************************************************************* Synopsis [Returns the file size.] Description [The file should be closed.] SideEffects [] SeeAlso [] ***********************************************************************/ void Gia_FixFileName( char * pFileName ) { char * pName; for ( pName = pFileName; *pName; pName++ ) if ( *pName == '>' ) *pName = '\\'; } /**Function************************************************************* Synopsis [Returns the file size.] Description [The file should be closed.] SideEffects [] SeeAlso [] ***********************************************************************/ int Gia_FileSize( char * pFileName ) { FILE * pFile; int nFileSize; pFile = fopen( pFileName, "r" ); if ( pFile == NULL ) { printf( "Gia_FileSize(): The file is unavailable (absent or open).\n" ); return 0; } fseek( pFile, 0, SEEK_END ); nFileSize = ftell( pFile ); fclose( pFile ); return nFileSize; } /**Function************************************************************* Synopsis [] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ char * Gia_FileNameGeneric( char * FileName ) { char * pDot, * pRes; pRes = Gia_UtilStrsav( FileName ); if ( (pDot = strrchr( pRes, '.' )) ) *pDot = 0; return pRes; } /**Function************************************************************* Synopsis [Read integer from the string.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ int Gia_ReadInt( unsigned char * pPos ) { int i, Value = 0; for ( i = 0; i < 4; i++ ) Value = (Value << 8) | *pPos++; return Value; } /**Function************************************************************* Synopsis [Reads decoded value.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ unsigned Gia_ReadDiffValue( unsigned char ** ppPos, int iPrev ) { int Item = Gia_ReadAigerDecode( ppPos ); if ( Item & 1 ) return iPrev + (Item >> 1); return iPrev - (Item >> 1); } /**Function************************************************************* Synopsis [Read equivalence classes from the string.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ Gia_Rpr_t * Gia_ReadEquivClasses( unsigned char ** ppPos, int nSize ) { Gia_Rpr_t * pReprs; unsigned char * pStop; int i, Item, fProved, iRepr, iNode; pStop = *ppPos; pStop += Gia_ReadInt( *ppPos ); *ppPos += 4; pReprs = ABC_CALLOC( Gia_Rpr_t, nSize ); for ( i = 0; i < nSize; i++ ) pReprs[i].iRepr = GIA_VOID; iRepr = iNode = 0; while ( *ppPos < pStop ) { Item = Gia_ReadAigerDecode( ppPos ); if ( Item & 1 ) { iRepr += (Item >> 1); iNode = iRepr; //printf( "\nRepr = %d ", iRepr ); continue; } Item >>= 1; fProved = (Item & 1); Item >>= 1; iNode += Item; pReprs[iNode].fProved = fProved; pReprs[iNode].iRepr = iRepr; assert( iRepr < iNode ); //printf( "Node = %d ", iNode ); } return pReprs; } /**Function************************************************************* Synopsis [Read flop classes from the string.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ void Gia_ReadFlopClasses( unsigned char ** ppPos, Vec_Int_t * vClasses, int nSize ) { int nAlloc = Gia_ReadInt( *ppPos ); *ppPos += 4; assert( nAlloc/4 == nSize ); assert( Vec_IntSize(vClasses) == nSize ); memcpy( Vec_IntArray(vClasses), *ppPos, 4*nSize ); *ppPos += 4 * nSize; } /**Function************************************************************* Synopsis [Read equivalence classes from the string.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ int * Gia_ReadMapping( unsigned char ** ppPos, int nSize ) { int * pMapping; unsigned char * pStop; int k, j, nFanins, nAlloc, iNode = 0, iOffset = nSize; pStop = *ppPos; pStop += Gia_ReadInt( *ppPos ); *ppPos += 4; nAlloc = nSize + pStop - *ppPos; pMapping = ABC_CALLOC( int, nAlloc ); while ( *ppPos < pStop ) { k = iOffset; pMapping[k++] = nFanins = Gia_ReadAigerDecode( ppPos ); for ( j = 0; j <= nFanins; j++ ) pMapping[k++] = iNode = Gia_ReadDiffValue( ppPos, iNode ); pMapping[iNode] = iOffset; iOffset = k; } assert( iOffset <= nAlloc ); return pMapping; } /**Function************************************************************* Synopsis [Read switching from the string.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ unsigned char * Gia_ReadSwitching( unsigned char ** ppPos, int nSize ) { unsigned char * pSwitching; int nAlloc = Gia_ReadInt( *ppPos ); *ppPos += 4; assert( nAlloc == nSize ); pSwitching = ABC_ALLOC( unsigned char, nSize ); memcpy( pSwitching, *ppPos, nSize ); *ppPos += nSize; return pSwitching; } /**Function************************************************************* Synopsis [Read placement from the string.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ Gia_Plc_t * Gia_ReadPlacement( unsigned char ** ppPos, int nSize ) { Gia_Plc_t * pPlacement; int nAlloc = Gia_ReadInt( *ppPos ); *ppPos += 4; assert( nAlloc/4 == nSize ); pPlacement = ABC_ALLOC( Gia_Plc_t, nSize ); memcpy( pPlacement, *ppPos, 4*nSize ); *ppPos += 4 * nSize; return pPlacement; } /**Function************************************************************* Synopsis [Reads the AIG in the binary AIGER format.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ Gia_Man_t * Gia_ReadAiger2( char * pFileName, int fCheck ) { FILE * pFile; Gia_Man_t * pNew; Vec_Int_t * vLits = NULL; Vec_Int_t * vNodes, * vDrivers;//, * vTerms; int iObj, iNode0, iNode1; int nTotal, nInputs, nOutputs, nLatches, nAnds, nFileSize, i;//, iTerm, nDigits; unsigned char * pDrivers, * pSymbols, * pCur;//, * pType; char * pContents, * pName; unsigned uLit0, uLit1, uLit; // read the file into the buffer Gia_FixFileName( pFileName ); nFileSize = Gia_FileSize( pFileName ); pFile = fopen( pFileName, "rb" ); pContents = ABC_ALLOC( char, nFileSize ); fread( pContents, nFileSize, 1, pFile ); fclose( pFile ); // check if the input file format is correct if ( strncmp(pContents, "aig", 3) != 0 || (pContents[3] != ' ' && pContents[3] != '2') ) { ABC_FREE( pContents ); fprintf( stdout, "Wrong input file format.\n" ); return NULL; } // read the file type pCur = (unsigned char *)pContents; while ( *pCur++ != ' ' ); // read the number of objects nTotal = atoi( (char *)pCur ); while ( *pCur++ != ' ' ); // read the number of inputs nInputs = atoi( (char *)pCur ); while ( *pCur++ != ' ' ); // read the number of latches nLatches = atoi( (char *)pCur ); while ( *pCur++ != ' ' ); // read the number of outputs nOutputs = atoi( (char *)pCur ); while ( *pCur++ != ' ' ); // read the number of nodes nAnds = atoi( (char *)pCur ); while ( *pCur++ != '\n' ); // check the parameters if ( nTotal != nInputs + nLatches + nAnds ) { ABC_FREE( pContents ); fprintf( stdout, "The paramters are wrong.\n" ); return NULL; } // allocate the empty AIG pNew = Gia_ManStart( nTotal + nLatches + nOutputs + 1 ); pName = Gia_FileNameGeneric( pFileName ); pNew->pName = Gia_UtilStrsav( pName ); // pNew->pSpec = Gia_UtilStrsav( pFileName ); ABC_FREE( pName ); // prepare the array of nodes vNodes = Vec_IntAlloc( 1 + nTotal ); Vec_IntPush( vNodes, 0 ); // create the PIs for ( i = 0; i < nInputs + nLatches; i++ ) { iObj = Gia_ManAppendCi(pNew); Vec_IntPush( vNodes, iObj ); } // remember the beginning of latch/PO literals pDrivers = pCur; if ( pContents[3] == ' ' ) // standard AIGER { // scroll to the beginning of the binary data for ( i = 0; i < nLatches + nOutputs; ) if ( *pCur++ == '\n' ) i++; } else // modified AIGER { vLits = Gia_WriteDecodeLiterals( &pCur, nLatches + nOutputs ); } // create the AND gates for ( i = 0; i < nAnds; i++ ) { uLit = ((i + 1 + nInputs + nLatches) << 1); uLit1 = uLit - Gia_ReadAigerDecode( &pCur ); uLit0 = uLit1 - Gia_ReadAigerDecode( &pCur ); // assert( uLit1 > uLit0 ); iNode0 = Gia_LitNotCond( Vec_IntEntry(vNodes, uLit0 >> 1), uLit0 & 1 ); iNode1 = Gia_LitNotCond( Vec_IntEntry(vNodes, uLit1 >> 1), uLit1 & 1 ); assert( Vec_IntSize(vNodes) == i + 1 + nInputs + nLatches ); // Vec_IntPush( vNodes, Gia_And(pNew, iNode0, iNode1) ); Vec_IntPush( vNodes, Gia_ManAppendAnd(pNew, iNode0, iNode1) ); } // remember the place where symbols begin pSymbols = pCur; // read the latch driver literals vDrivers = Vec_IntAlloc( nLatches + nOutputs ); if ( pContents[3] == ' ' ) // standard AIGER { pCur = pDrivers; for ( i = 0; i < nLatches; i++ ) { uLit0 = atoi( (char *)pCur ); while ( *pCur++ != '\n' ); iNode0 = Gia_LitNotCond( Vec_IntEntry(vNodes, uLit0 >> 1), (uLit0 & 1) ); Vec_IntPush( vDrivers, iNode0 ); } // read the PO driver literals for ( i = 0; i < nOutputs; i++ ) { uLit0 = atoi( (char *)pCur ); while ( *pCur++ != '\n' ); iNode0 = Gia_LitNotCond( Vec_IntEntry(vNodes, uLit0 >> 1), (uLit0 & 1) ); Vec_IntPush( vDrivers, iNode0 ); } } else { // read the latch driver literals for ( i = 0; i < nLatches; i++ ) { uLit0 = Vec_IntEntry( vLits, i ); iNode0 = Gia_LitNotCond( Vec_IntEntry(vNodes, uLit0 >> 1), (uLit0 & 1) ); Vec_IntPush( vDrivers, iNode0 ); } // read the PO driver literals for ( i = 0; i < nOutputs; i++ ) { uLit0 = Vec_IntEntry( vLits, i+nLatches ); iNode0 = Gia_LitNotCond( Vec_IntEntry(vNodes, uLit0 >> 1), (uLit0 & 1) ); Vec_IntPush( vDrivers, iNode0 ); } Vec_IntFree( vLits ); } // create the POs for ( i = 0; i < nOutputs; i++ ) Gia_ManAppendCo( pNew, Vec_IntEntry(vDrivers, nLatches + i) ); for ( i = 0; i < nLatches; i++ ) Gia_ManAppendCo( pNew, Vec_IntEntry(vDrivers, i) ); Vec_IntFree( vDrivers ); // create the latches Gia_ManSetRegNum( pNew, nLatches ); // check if there are other types of information to read pCur = pSymbols; if ( (char *)pCur + 1 < pContents + nFileSize && *pCur == 'c' ) { pCur++; if ( *pCur == 'e' ) { pCur++; // read equivalence classes pNew->pReprs = Gia_ReadEquivClasses( &pCur, Gia_ManObjNum(pNew) ); pNew->pNexts = Gia_ManDeriveNexts( pNew ); } if ( *pCur == 'f' ) { pCur++; // read flop classes pNew->vFlopClasses = Vec_IntStart( Gia_ManRegNum(pNew) ); Gia_ReadFlopClasses( &pCur, pNew->vFlopClasses, Gia_ManRegNum(pNew) ); } if ( *pCur == 'm' ) { pCur++; // read mapping pNew->pMapping = Gia_ReadMapping( &pCur, Gia_ManObjNum(pNew) ); } if ( *pCur == 'p' ) { pCur++; // read placement pNew->pPlacement = Gia_ReadPlacement( &pCur, Gia_ManObjNum(pNew) ); } if ( *pCur == 's' ) { pCur++; // read switching activity pNew->pSwitching = Gia_ReadSwitching( &pCur, Gia_ManObjNum(pNew) ); } if ( *pCur == 'c' ) { pCur++; // read number of constraints pNew->nConstrs = Gia_ReadInt( pCur ); pCur += 4; } if ( *pCur == 'n' ) { pCur++; // read model name ABC_FREE( pNew->pName ); pNew->pName = Gia_UtilStrsav( (char *)pCur ); } } Vec_IntFree( vNodes ); // skipping the comments /* // check the result if ( fCheck && !Gia_ManCheck( pNew ) ) { printf( "Gia_ReadAiger: The network check has failed.\n" ); Gia_ManStop( pNew ); return NULL; } */ return pNew; } /**Function************************************************************* Synopsis [Reads the AIG in the binary AIGER format.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ Gia_Man_t * Gia_ReadAigerFromMemory( char * pContents, int nFileSize, int fCheck ) { Gia_Man_t * pNew, * pTemp; Vec_Int_t * vLits = NULL; Vec_Int_t * vNodes, * vDrivers;//, * vTerms; int iObj, iNode0, iNode1; int nTotal, nInputs, nOutputs, nLatches, nAnds, i;//, iTerm, nDigits; unsigned char * pDrivers, * pSymbols, * pCur;//, * pType; unsigned uLit0, uLit1, uLit; // read the file type pCur = (unsigned char *)pContents; while ( *pCur++ != ' ' ); // read the number of objects nTotal = atoi( (char *)pCur ); while ( *pCur++ != ' ' ); // read the number of inputs nInputs = atoi( (char *)pCur ); while ( *pCur++ != ' ' ); // read the number of latches nLatches = atoi( (char *)pCur ); while ( *pCur++ != ' ' ); // read the number of outputs nOutputs = atoi( (char *)pCur ); while ( *pCur++ != ' ' ); // read the number of nodes nAnds = atoi( (char *)pCur ); while ( *pCur++ != '\n' ); // check the parameters if ( nTotal != nInputs + nLatches + nAnds ) { ABC_FREE( pContents ); fprintf( stdout, "The paramters are wrong.\n" ); return NULL; } // allocate the empty AIG pNew = Gia_ManStart( nTotal + nLatches + nOutputs + 1 ); // prepare the array of nodes vNodes = Vec_IntAlloc( 1 + nTotal ); Vec_IntPush( vNodes, 0 ); // create the PIs for ( i = 0; i < nInputs + nLatches; i++ ) { iObj = Gia_ManAppendCi(pNew); Vec_IntPush( vNodes, iObj ); } // remember the beginning of latch/PO literals pDrivers = pCur; if ( pContents[3] == ' ' ) // standard AIGER { // scroll to the beginning of the binary data for ( i = 0; i < nLatches + nOutputs; ) if ( *pCur++ == '\n' ) i++; } else // modified AIGER { vLits = Gia_WriteDecodeLiterals( &pCur, nLatches + nOutputs ); } // create the AND gates for ( i = 0; i < nAnds; i++ ) { uLit = ((i + 1 + nInputs + nLatches) << 1); uLit1 = uLit - Gia_ReadAigerDecode( &pCur ); uLit0 = uLit1 - Gia_ReadAigerDecode( &pCur ); // assert( uLit1 > uLit0 ); iNode0 = Gia_LitNotCond( Vec_IntEntry(vNodes, uLit0 >> 1), uLit0 & 1 ); iNode1 = Gia_LitNotCond( Vec_IntEntry(vNodes, uLit1 >> 1), uLit1 & 1 ); assert( Vec_IntSize(vNodes) == i + 1 + nInputs + nLatches ); // Vec_IntPush( vNodes, Gia_And(pNew, iNode0, iNode1) ); Vec_IntPush( vNodes, Gia_ManAppendAnd(pNew, iNode0, iNode1) ); } // remember the place where symbols begin pSymbols = pCur; // read the latch driver literals vDrivers = Vec_IntAlloc( nLatches + nOutputs ); if ( pContents[3] == ' ' ) // standard AIGER { pCur = pDrivers; for ( i = 0; i < nLatches; i++ ) { uLit0 = atoi( (char *)pCur ); while ( *pCur++ != '\n' ); iNode0 = Gia_LitNotCond( Vec_IntEntry(vNodes, uLit0 >> 1), (uLit0 & 1) ); Vec_IntPush( vDrivers, iNode0 ); } // read the PO driver literals for ( i = 0; i < nOutputs; i++ ) { uLit0 = atoi( (char *)pCur ); while ( *pCur++ != '\n' ); iNode0 = Gia_LitNotCond( Vec_IntEntry(vNodes, uLit0 >> 1), (uLit0 & 1) ); Vec_IntPush( vDrivers, iNode0 ); } } else { // read the latch driver literals for ( i = 0; i < nLatches; i++ ) { uLit0 = Vec_IntEntry( vLits, i ); iNode0 = Gia_LitNotCond( Vec_IntEntry(vNodes, uLit0 >> 1), (uLit0 & 1) ); Vec_IntPush( vDrivers, iNode0 ); } // read the PO driver literals for ( i = 0; i < nOutputs; i++ ) { uLit0 = Vec_IntEntry( vLits, i+nLatches ); iNode0 = Gia_LitNotCond( Vec_IntEntry(vNodes, uLit0 >> 1), (uLit0 & 1) ); Vec_IntPush( vDrivers, iNode0 ); } Vec_IntFree( vLits ); } // check if there are other types of information to read pCur = pSymbols; if ( (char *)pCur + 1 < pContents + nFileSize && *pCur == 'c' ) { pCur++; if ( *pCur == 'e' ) { pCur++; // read equivalence classes pNew->pReprs = Gia_ReadEquivClasses( &pCur, Gia_ManObjNum(pNew) ); pNew->pNexts = Gia_ManDeriveNexts( pNew ); } if ( *pCur == 'f' ) { pCur++; // read flop classes pNew->vFlopClasses = Vec_IntStart( Gia_ManRegNum(pNew) ); Gia_ReadFlopClasses( &pCur, pNew->vFlopClasses, Gia_ManRegNum(pNew) ); } if ( *pCur == 'm' ) { pCur++; // read mapping pNew->pMapping = Gia_ReadMapping( &pCur, Gia_ManObjNum(pNew) ); } if ( *pCur == 'p' ) { pCur++; // read placement pNew->pPlacement = Gia_ReadPlacement( &pCur, Gia_ManObjNum(pNew) ); } if ( *pCur == 's' ) { pCur++; // read switching activity pNew->pSwitching = Gia_ReadSwitching( &pCur, Gia_ManObjNum(pNew) ); } if ( *pCur == 'c' ) { pCur++; // read number of constraints pNew->nConstrs = Gia_ReadInt( pCur ); pCur += 4; } if ( *pCur == 'n' ) { pCur++; // read model name ABC_FREE( pNew->pName ); pNew->pName = Gia_UtilStrsav( (char *)pCur ); } } // read signal names if they are of the special type if ( *pCur != 'c' ) { int fBreakUsed = 0; char * pCurOld = pCur; pNew->vUserPiIds = Vec_IntStartFull( Gia_ManPiNum(pNew) ); pNew->vUserPoIds = Vec_IntStartFull( Gia_ManPoNum(pNew) ); pNew->vUserFfIds = Vec_IntStartFull( Gia_ManRegNum(pNew) ); while ( (char *)pCur < pContents + nFileSize && *pCur != 'c' ) { int iTerm; char * pType = (char *)pCur; // check terminal type if ( *pCur != 'i' && *pCur != 'o' && *pCur != 'l' ) { // fprintf( stdout, "Wrong terminal type.\n" ); fBreakUsed = 1; break; } // get terminal number iTerm = atoi( (char *)++pCur ); while ( *pCur++ != ' ' ); // skip spaces while ( *pCur == ' ' ) pCur++; // decode the user numbers: // flops are named: @l // PIs are named: @i // POs are named: @o if ( *pCur++ != '@' ) { fBreakUsed = 1; break; } if ( *pCur == 'i' && *pType == 'i' ) Vec_IntWriteEntry( pNew->vUserPiIds, iTerm, atoi((char *)pCur+1) ); else if ( *pCur == 'o' && *pType == 'o' ) Vec_IntWriteEntry( pNew->vUserPoIds, iTerm, atoi((char *)pCur+1) ); else if ( *pCur == 'l' && *pType == 'l' ) Vec_IntWriteEntry( pNew->vUserFfIds, iTerm, atoi((char *)pCur+1) ); else { fprintf( stdout, "Wrong name format.\n" ); fBreakUsed = 1; break; } // skip digits while ( *pCur++ != '\n' ); } // in case of abnormal termination, remove the arrays if ( fBreakUsed ) { char * pName; int Entry, nInvars, nConstr, iTerm; Vec_Int_t * vPoNames = Vec_IntStartFull( nOutputs ); Vec_IntFreeP( &pNew->vUserPiIds ); Vec_IntFreeP( &pNew->vUserPoIds ); Vec_IntFreeP( &pNew->vUserFfIds ); // try to figure out signal names fBreakUsed = 0; pCur = pCurOld; while ( pCur < pContents + nFileSize && *pCur != 'c' ) { // get the terminal type if ( *pCur == 'i' || *pCur == 'l' ) continue; if ( *pCur != 'o' ) { fprintf( stdout, "Wrong terminal type.\n" ); fBreakUsed = 1; break; } // get the terminal number iTerm = atoi( ++pCur ); while ( *pCur++ != ' ' ); // get the node if ( iTerm < 0 || iTerm >= nOutputs ) { fprintf( stdout, "The output number (%d) is out of range.\n", iTerm ); fBreakUsed = 1; break; } if ( Vec_IntEntry(vPoNames, iTerm) != ~0 ) { fprintf( stdout, "The output number (%d) is listed twice.\n", iTerm ); fBreakUsed = 1; break; } // get the name pName = pCur; while ( *pCur++ != '\n' ); *(pCur-1) = 0; // assign the name Vec_IntWriteEntry( vPoNames, iTerm, pName - pContents ); } // check that all names are assigned if ( !fBreakUsed ) { nInvars = nConstr = 0; Vec_IntForEachEntry( vPoNames, Entry, i ) { if ( Entry == ~0 ) continue; if ( strncmp( pContents+Entry, "constraint:", 11 ) == 0 ) nConstr++; if ( strncmp( pContents+Entry, "invariant:", 10 ) == 0 ) nInvars++; } // move constraints forward in the PO list if ( nConstr || nInvars ) { int k = nLatches; Vec_Int_t * vDriversCopy = Vec_IntDup( vDrivers ); Vec_IntForEachEntry( vPoNames, Entry, i ) if ( Entry == ~0 || (strncmp( pContents+Entry, "constraint:", 11 ) != 0 && strncmp( pContents+Entry, "invariant:", 10 ) != 0) ) Vec_IntWriteEntry( vDrivers, k++, Vec_IntEntry(vDriversCopy, nLatches + i) ); Vec_IntForEachEntry( vPoNames, Entry, i ) if ( Entry != ~0 && strncmp( pContents+Entry, "constraint:", 11 ) == 0 ) Vec_IntWriteEntry( vDrivers, k++, Vec_IntEntry(vDriversCopy, nLatches + i) ^ 1 ); // flip polarity!!! // update the PO count nOutputs -= nInvars; assert( k == nLatches + nOutputs ); Vec_IntFree( vDriversCopy ); // mark constraints pNew->nConstrs = nConstr; } if ( nConstr ) fprintf( stdout, "Recognized and added %d constraints.\n", nConstr ); if ( nInvars ) fprintf( stdout, "Recognized and skipped %d invariants.\n", nInvars ); } Vec_IntFree( vPoNames ); } } // create the POs for ( i = 0; i < nOutputs; i++ ) Gia_ManAppendCo( pNew, Vec_IntEntry(vDrivers, nLatches + i) ); for ( i = 0; i < nLatches; i++ ) Gia_ManAppendCo( pNew, Vec_IntEntry(vDrivers, i) ); Vec_IntFree( vDrivers ); // create the latches Gia_ManSetRegNum( pNew, nLatches ); // skipping the comments Vec_IntFree( vNodes ); /* // check the result if ( fCheck && !Gia_ManCheck( pNew ) ) { printf( "Gia_ReadAiger: The network check has failed.\n" ); Gia_ManStop( pNew ); return NULL; } */ pNew = Gia_ManCleanup( pTemp = pNew ); Gia_ManStop( pTemp ); return pNew; } /**Function************************************************************* Synopsis [Reads the AIG in the binary AIGER format.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ Gia_Man_t * Gia_ReadAiger( char * pFileName, int fCheck ) { FILE * pFile; Gia_Man_t * pNew; char * pName, * pContents; int nFileSize; // read the file into the buffer Gia_FixFileName( pFileName ); nFileSize = Gia_FileSize( pFileName ); pFile = fopen( pFileName, "rb" ); pContents = ABC_ALLOC( char, nFileSize ); fread( pContents, nFileSize, 1, pFile ); fclose( pFile ); pNew = Gia_ReadAigerFromMemory( pContents, nFileSize, fCheck ); ABC_FREE( pContents ); if ( pNew ) { ABC_FREE( pNew->pName ); pName = Gia_FileNameGeneric( pFileName ); pNew->pName = Gia_UtilStrsav( pName ); // pNew->pSpec = Ioa_UtilStrsav( pFileName ); ABC_FREE( pName ); } return pNew; } /**Function************************************************************* Synopsis [Adds one unsigned AIG edge to the output buffer.] Description [This procedure is a slightly modified version of Armin Biere's procedure "void encode (FILE * file, unsigned x)" ] SideEffects [Returns the current writing position.] SeeAlso [] ***********************************************************************/ int Gia_WriteAigerEncode( unsigned char * pBuffer, int Pos, unsigned x ) { unsigned char ch; while (x & ~0x7f) { ch = (x & 0x7f) | 0x80; pBuffer[Pos++] = ch; x >>= 7; } ch = x; pBuffer[Pos++] = ch; return Pos; } /**Function************************************************************* Synopsis [Create the array of literals to be written.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ Vec_Int_t * Gia_WriteAigerLiterals( Gia_Man_t * p ) { Vec_Int_t * vLits; Gia_Obj_t * pObj; int i; vLits = Vec_IntAlloc( Gia_ManPoNum(p) ); Gia_ManForEachRi( p, pObj, i ) Vec_IntPush( vLits, Gia_ObjFaninLit0p(p, pObj) ); Gia_ManForEachPo( p, pObj, i ) Vec_IntPush( vLits, Gia_ObjFaninLit0p(p, pObj) ); return vLits; } /**Function************************************************************* Synopsis [Creates the binary encoded array of literals.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ Vec_Str_t * Gia_WriteEncodeLiterals( Vec_Int_t * vLits ) { Vec_Str_t * vBinary; int Pos = 0, Lit, LitPrev, Diff, i; vBinary = Vec_StrAlloc( 2 * Vec_IntSize(vLits) ); LitPrev = Vec_IntEntry( vLits, 0 ); Pos = Gia_WriteAigerEncode( (unsigned char *)Vec_StrArray(vBinary), Pos, LitPrev ); Vec_IntForEachEntryStart( vLits, Lit, i, 1 ) { Diff = Lit - LitPrev; Diff = (Lit < LitPrev)? -Diff : Diff; Diff = (Diff << 1) | (int)(Lit < LitPrev); Pos = Gia_WriteAigerEncode( (unsigned char *)Vec_StrArray(vBinary), Pos, Diff ); LitPrev = Lit; if ( Pos + 10 > vBinary->nCap ) Vec_StrGrow( vBinary, vBinary->nCap+1 ); } vBinary->nSize = Pos; /* // verify { extern Vec_Int_t * Gia_WriteDecodeLiterals( char ** ppPos, int nEntries ); char * pPos = Vec_StrArray( vBinary ); Vec_Int_t * vTemp = Gia_WriteDecodeLiterals( &pPos, Vec_IntSize(vLits) ); for ( i = 0; i < Vec_IntSize(vLits); i++ ) { int Entry1 = Vec_IntEntry(vLits,i); int Entry2 = Vec_IntEntry(vTemp,i); assert( Entry1 == Entry2 ); } Vec_IntFree( vTemp ); } */ return vBinary; } /**Function************************************************************* Synopsis [Write integer into the string.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ void Gia_WriteInt( unsigned char * pPos, int Value ) { int i; for ( i = 3; i >= 0; i-- ) *pPos++ = (Value >> (8*i)) & 255; } /**Function************************************************************* Synopsis [Read equivalence classes from the string.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ unsigned char * Gia_WriteEquivClasses( Gia_Man_t * p, int * pEquivSize ) { unsigned char * pBuffer; int iRepr, iNode, iPrevRepr, iPrevNode, iLit, nItems, iPos; assert( p->pReprs && p->pNexts ); // count the number of entries to be written nItems = 0; for ( iRepr = 1; iRepr < Gia_ManObjNum(p); iRepr++ ) { nItems += Gia_ObjIsConst( p, iRepr ); if ( !Gia_ObjIsHead(p, iRepr) ) continue; Gia_ClassForEachObj( p, iRepr, iNode ) nItems++; } pBuffer = ABC_ALLOC( unsigned char, sizeof(int) * (nItems + 1) ); // write constant class iPos = Gia_WriteAigerEncode( pBuffer, 4, Gia_Var2Lit(0, 1) ); //printf( "\nRepr = %d ", 0 ); iPrevNode = 0; for ( iNode = 1; iNode < Gia_ManObjNum(p); iNode++ ) if ( Gia_ObjIsConst(p, iNode) ) { //printf( "Node = %d ", iNode ); iLit = Gia_Var2Lit( iNode - iPrevNode, Gia_ObjProved(p, iNode) ); iPrevNode = iNode; iPos = Gia_WriteAigerEncode( pBuffer, iPos, Gia_Var2Lit(iLit, 0) ); } // write non-constant classes iPrevRepr = 0; Gia_ManForEachClass( p, iRepr ) { //printf( "\nRepr = %d ", iRepr ); iPos = Gia_WriteAigerEncode( pBuffer, iPos, Gia_Var2Lit(iRepr - iPrevRepr, 1) ); iPrevRepr = iPrevNode = iRepr; Gia_ClassForEachObj1( p, iRepr, iNode ) { //printf( "Node = %d ", iNode ); iLit = Gia_Var2Lit( iNode - iPrevNode, Gia_ObjProved(p, iNode) ); iPrevNode = iNode; iPos = Gia_WriteAigerEncode( pBuffer, iPos, Gia_Var2Lit(iLit, 0) ); } } Gia_WriteInt( pBuffer, iPos ); *pEquivSize = iPos; return pBuffer; } /**Function************************************************************* Synopsis [Reads decoded value.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ int Gia_WriteDiffValue( unsigned char * pPos, int iPos, int iPrev, int iThis ) { if ( iPrev < iThis ) return Gia_WriteAigerEncode( pPos, iPos, Gia_Var2Lit(iThis - iPrev, 1) ); return Gia_WriteAigerEncode( pPos, iPos, Gia_Var2Lit(iPrev - iThis, 0) ); } /**Function************************************************************* Synopsis [Read equivalence classes from the string.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ unsigned char * Gia_WriteMapping( Gia_Man_t * p, int * pMapSize ) { unsigned char * pBuffer; int i, k, iPrev, iFan, nItems, iPos = 4; assert( p->pMapping ); // count the number of entries to be written nItems = 0; Gia_ManForEachLut( p, i ) nItems += 2 + Gia_ObjLutSize( p, i ); pBuffer = ABC_ALLOC( unsigned char, sizeof(int) * (nItems + 1) ); // write non-constant classes iPrev = 0; Gia_ManForEachLut( p, i ) { //printf( "\nSize = %d ", Gia_ObjLutSize(p, i) ); iPos = Gia_WriteAigerEncode( pBuffer, iPos, Gia_ObjLutSize(p, i) ); Gia_LutForEachFanin( p, i, iFan, k ) { //printf( "Fan = %d ", iFan ); iPos = Gia_WriteDiffValue( pBuffer, iPos, iPrev, iFan ); iPrev = iFan; } iPos = Gia_WriteDiffValue( pBuffer, iPos, iPrev, i ); iPrev = i; //printf( "Node = %d ", i ); } //printf( "\n" ); Gia_WriteInt( pBuffer, iPos ); *pMapSize = iPos; return pBuffer; } /**Function************************************************************* Synopsis [Writes the AIG in the binary AIGER format.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ void Gia_WriteAiger( Gia_Man_t * pInit, char * pFileName, int fWriteSymbols, int fCompact ) { FILE * pFile; Gia_Man_t * p; Gia_Obj_t * pObj; int i, nBufferSize, Pos; unsigned char * pBuffer; unsigned uLit0, uLit1, uLit; if ( Gia_ManCoNum(pInit) == 0 ) { printf( "AIG cannot be written because it has no POs.\n" ); return; } // start the output stream pFile = fopen( pFileName, "wb" ); if ( pFile == NULL ) { fprintf( stdout, "Gia_WriteAiger(): Cannot open the output file \"%s\".\n", pFileName ); return; } // create normalized AIG if ( !Gia_ManIsNormalized(pInit) ) { // printf( "Gia_WriteAiger(): Normalizing AIG for writing.\n" ); p = Gia_ManDupNormalized( pInit ); } else p = pInit; // write the header "M I L O A" where M = I + L + A fprintf( pFile, "aig%s %u %u %u %u %u\n", fCompact? "2" : "", Gia_ManCiNum(p) + Gia_ManAndNum(p), Gia_ManPiNum(p), Gia_ManRegNum(p), Gia_ManPoNum(p), Gia_ManAndNum(p) ); if ( !fCompact ) { // write latch drivers Gia_ManForEachRi( p, pObj, i ) fprintf( pFile, "%u\n", Gia_ObjFaninLit0p(p, pObj) ); // write PO drivers Gia_ManForEachPo( p, pObj, i ) fprintf( pFile, "%u\n", Gia_ObjFaninLit0p(p, pObj) ); } else { Vec_Int_t * vLits = Gia_WriteAigerLiterals( p ); Vec_Str_t * vBinary = Gia_WriteEncodeLiterals( vLits ); fwrite( Vec_StrArray(vBinary), 1, Vec_StrSize(vBinary), pFile ); Vec_StrFree( vBinary ); Vec_IntFree( vLits ); } // write the nodes into the buffer Pos = 0; nBufferSize = 6 * Gia_ManAndNum(p) + 100; // skeptically assuming 3 chars per one AIG edge pBuffer = ABC_ALLOC( unsigned char, nBufferSize ); Gia_ManForEachAnd( p, pObj, i ) { uLit = Gia_Var2Lit( i, 0 ); uLit0 = Gia_ObjFaninLit0( pObj, i ); uLit1 = Gia_ObjFaninLit1( pObj, i ); assert( uLit0 < uLit1 ); Pos = Gia_WriteAigerEncode( pBuffer, Pos, uLit - uLit1 ); Pos = Gia_WriteAigerEncode( pBuffer, Pos, uLit1 - uLit0 ); if ( Pos > nBufferSize - 10 ) { printf( "Gia_WriteAiger(): AIGER generation has failed because the allocated buffer is too small.\n" ); fclose( pFile ); if ( p != pInit ) Gia_ManStop( p ); return; } } assert( Pos < nBufferSize ); // write the buffer fwrite( pBuffer, 1, Pos, pFile ); ABC_FREE( pBuffer ); // write the symbol table if ( p->vNamesIn && p->vNamesOut ) { assert( Vec_PtrSize(p->vNamesIn) == Gia_ManCiNum(p) ); assert( Vec_PtrSize(p->vNamesOut) == Gia_ManCoNum(p) ); // write PIs Gia_ManForEachPi( p, pObj, i ) fprintf( pFile, "i%d %s\n", i, Vec_PtrEntry(p->vNamesIn, i) ); // write latches Gia_ManForEachRo( p, pObj, i ) fprintf( pFile, "l%d %s\n", i, Vec_PtrEntry(p->vNamesIn, Gia_ManPiNum(p) + i) ); // write POs Gia_ManForEachPo( p, pObj, i ) fprintf( pFile, "o%d %s\n", i, Vec_PtrEntry(p->vNamesOut, i) ); } // write the comment fprintf( pFile, "c" ); // write equivalences if ( p->pReprs && p->pNexts ) { int nEquivSize; unsigned char * pEquivs = Gia_WriteEquivClasses( p, &nEquivSize ); fprintf( pFile, "e" ); fwrite( pEquivs, 1, nEquivSize, pFile ); ABC_FREE( pEquivs ); } // write flop classes if ( p->vFlopClasses ) { unsigned char Buffer[10]; int nSize = 4*Gia_ManRegNum(p); Gia_WriteInt( Buffer, nSize ); fprintf( pFile, "f" ); fwrite( Buffer, 1, 4, pFile ); fwrite( Vec_IntArray(p->vFlopClasses), 1, nSize, pFile ); } // write mapping if ( p->pMapping ) { int nMapSize; unsigned char * pMaps = Gia_WriteMapping( p, &nMapSize ); fprintf( pFile, "m" ); fwrite( pMaps, 1, nMapSize, pFile ); ABC_FREE( pMaps ); } // write placement if ( p->pPlacement ) { unsigned char Buffer[10]; int nSize = 4*Gia_ManObjNum(p); Gia_WriteInt( Buffer, nSize ); fprintf( pFile, "p" ); fwrite( Buffer, 1, 4, pFile ); fwrite( p->pPlacement, 1, nSize, pFile ); } // write flop classes if ( p->pSwitching ) { unsigned char Buffer[10]; int nSize = Gia_ManObjNum(p); Gia_WriteInt( Buffer, nSize ); fprintf( pFile, "s" ); fwrite( Buffer, 1, 4, pFile ); fwrite( p->pSwitching, 1, nSize, pFile ); } // write constraints if ( p->nConstrs ) { unsigned char Buffer[10]; Gia_WriteInt( Buffer, p->nConstrs ); fprintf( pFile, "c" ); fwrite( Buffer, 1, 4, pFile ); } // write name if ( p->pName ) fprintf( pFile, "n%s%c", p->pName, '\0' ); fprintf( pFile, "\nThis file was produced by the GIA package in ABC on %s\n", Gia_TimeStamp() ); fprintf( pFile, "For information about AIGER format, refer to %s\n", "http://fmv.jku.at/aiger" ); fclose( pFile ); if ( p != pInit ) Gia_ManStop( p ); } /**Function************************************************************* Synopsis [Writes the AIG in the binary AIGER format.] Description [] SideEffects [] SeeAlso [] ***********************************************************************/ void Gia_DumpAiger( Gia_Man_t * p, char * pFilePrefix, int iFileNum, int nFileNumDigits ) { char Buffer[100]; sprintf( Buffer, "%s%0*d.aig", pFilePrefix, nFileNumDigits, iFileNum ); Gia_WriteAiger( p, Buffer, 0, 0 ); } //////////////////////////////////////////////////////////////////////// /// END OF FILE /// //////////////////////////////////////////////////////////////////////// ABC_NAMESPACE_IMPL_END