Exemple #1
0
/**Function*************************************************************

  Synopsis    [Creates local copy.]

  Description []
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
static inline void Dau_DsdMergeCopy( char * pDsd, int fCompl, char * pRes )
{
    if ( fCompl && pDsd[0] == '!' )
        fCompl = 0, pDsd++;
    if ( Dau_DsdIsConst(pDsd) ) // constant
        pRes[0] = (fCompl ? (char)((int)pDsd[0] ^ 1) : pDsd[0]), pRes[1] = 0;
    else
        sprintf( pRes, "%s%s", fCompl ? "!" : "", pDsd );
}
Exemple #2
0
/**Function*************************************************************

  Synopsis    [Performs merging of two DSD formulas.]

  Description []
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
char * Dau_DsdMerge( char * pDsd0i, int * pPerm0, char * pDsd1i, int * pPerm1, int fCompl0, int fCompl1, int nVars )
{
    int fVerbose = 0;
    int fCheck = 0;
    static int Counter = 0;
    static char pRes[DAU_MAX_STR];
    char pDsd0[DAU_MAX_STR];
    char pDsd1[DAU_MAX_STR];
    int pMatches0[DAU_MAX_STR];
    int pMatches1[DAU_MAX_STR];
    int pVarPres[DAU_MAX_VAR];
    int pOld2New[DAU_MAX_VAR];
    int pNew2Old[DAU_MAX_VAR];
    int pStatus0[DAU_MAX_STR];
    int pStatus1[DAU_MAX_STR];
    int pMatches[DAU_MAX_STR];
    int nVarsShared, nVarsTotal;
    Dau_Sto_t S, * pS = &S;
    word * pTruth, * pt = NULL, * pt0 = NULL, * pt1 = NULL;
    word pParts[3][DAU_MAX_WORD];
    int Status;
    abctime clk = Abc_Clock();
    Counter++;
    // create local copies
    Dau_DsdMergeCopy( pDsd0i, fCompl0, pDsd0 );
    Dau_DsdMergeCopy( pDsd1i, fCompl1, pDsd1 );
if ( fVerbose )
printf( "\nAfter copying:\n" );
if ( fVerbose )
printf( "%s\n", pDsd0 );
if ( fVerbose )
printf( "%s\n", pDsd1 );
    // handle constants
    if ( Dau_DsdIsConst(pDsd0) || Dau_DsdIsConst(pDsd1) )
    {
        if ( Dau_DsdIsConst0(pDsd0) )
            strcpy( pRes, pDsd0 );
        else if ( Dau_DsdIsConst1(pDsd0) )
            strcpy( pRes, pDsd1 );
        else if ( Dau_DsdIsConst0(pDsd1) )
            strcpy( pRes, pDsd1 );
        else if ( Dau_DsdIsConst1(pDsd1) )
            strcpy( pRes, pDsd0 );
        else assert( 0 );
        return pRes;
    }

    // compute matches
    Dau_DsdMergeMatches( pDsd0, pMatches0 );
    Dau_DsdMergeMatches( pDsd1, pMatches1 );
    // implement permutation
    Dau_DsdMergeReplace( pDsd0, pMatches0, pPerm0 );
    Dau_DsdMergeReplace( pDsd1, pMatches1, pPerm1 );
if ( fVerbose )
printf( "After replacement:\n" );
if ( fVerbose )
printf( "%s\n", pDsd0 );
if ( fVerbose )
printf( "%s\n", pDsd1 );


    if ( fCheck )
    {
        pt0 = Dau_DsdToTruth( pDsd0, nVars );
        Abc_TtCopy( pParts[0], pt0, Abc_TtWordNum(nVars), 0 );
    }
    if ( fCheck )
    {
        pt1 = Dau_DsdToTruth( pDsd1, nVars );
        Abc_TtCopy( pParts[1], pt1, Abc_TtWordNum(nVars), 0 );
        Abc_TtAnd( pParts[2], pParts[0], pParts[1], Abc_TtWordNum(nVars), 0 );
    }

    // find shared varaiables
    nVarsShared = Dau_DsdMergeFindShared(pDsd0, pDsd1, pMatches0, pMatches1, pVarPres);
    if ( nVarsShared == 0 )
    {
        sprintf( pRes, "(%s%s)", pDsd0, pDsd1 );
if ( fVerbose )
printf( "Disjoint:\n" );
if ( fVerbose )
printf( "%s\n", pRes );

        Dau_DsdMergeMatches( pRes, pMatches );
        Dau_DsdRemoveBraces( pRes, pMatches );
        Dau_DsdNormalize( pRes );
if ( fVerbose )
printf( "Normalized:\n" );
if ( fVerbose )
printf( "%s\n", pRes );

        s_TimeComp[0] += Abc_Clock() - clk;
        return pRes;
    }
s_TimeComp[3] += Abc_Clock() - clk;
    // create variable mapping
    nVarsTotal = Dau_DsdMergeCreateMaps( pVarPres, nVarsShared, pOld2New, pNew2Old );
    // perform variable replacement
    Dau_DsdMergeReplace( pDsd0, pMatches0, pOld2New );
    Dau_DsdMergeReplace( pDsd1, pMatches1, pOld2New );
    // find uniqueness status
    Dau_DsdMergeStatus( pDsd0, pMatches0, nVarsShared, pStatus0 );
    Dau_DsdMergeStatus( pDsd1, pMatches1, nVarsShared, pStatus1 );
if ( fVerbose )
printf( "Individual status:\n" );
if ( fVerbose )
Dau_DsdMergePrintWithStatus( pDsd0, pStatus0 );
if ( fVerbose )
Dau_DsdMergePrintWithStatus( pDsd1, pStatus1 );
    // prepare storage
    Dau_DsdMergeStoreClean( pS, nVarsShared );
    // perform substitutions
    Dau_DsdMergeStoreCleanOutput( pS );
    Dau_DsdMergeSubstitute( pS, pDsd0, pMatches0, pStatus0 );
    strcpy( pDsd0, pS->pOutput );
if ( fVerbose )
printf( "Substitutions:\n" );
if ( fVerbose )
printf( "%s\n", pDsd0 );

    // perform substitutions
    Dau_DsdMergeStoreCleanOutput( pS );
    Dau_DsdMergeSubstitute( pS, pDsd1, pMatches1, pStatus1 );
    strcpy( pDsd1, pS->pOutput );
if ( fVerbose )
printf( "%s\n", pDsd1 );
if ( fVerbose )
Dau_DsdMergeStorePrintDefs( pS );

    // create new function
//    assert( nVarsTotal <= 6 );
    sprintf( pS->pOutput, "(%s%s)", pDsd0, pDsd1 );
    pTruth = Dau_DsdToTruth( pS->pOutput, nVarsTotal );
    Status = Dau_DsdDecompose( pTruth, nVarsTotal, 0, 1, pS->pOutput );
//printf( "%d ", Status );
    if ( Status == -1 ) // did not find 1-step DSD
        return NULL;
//    if ( Status > 6 ) // non-DSD part is too large
//        return NULL;
    if ( Dau_DsdIsConst(pS->pOutput) )
    {
        strcpy( pRes, pS->pOutput );
        return pRes;
    }
if ( fVerbose )
printf( "Decomposition:\n" );
if ( fVerbose )
printf( "%s\n", pS->pOutput );
    // substitute definitions
    Dau_DsdMergeMatches( pS->pOutput, pMatches );
    Dau_DsdMergeInlineDefinitions( pS->pOutput, pMatches, pS, pRes, nVarsShared );
if ( fVerbose )
printf( "Inlining:\n" );
if ( fVerbose )
printf( "%s\n", pRes );
    // perform variable replacement
    Dau_DsdMergeMatches( pRes, pMatches );
    Dau_DsdMergeReplace( pRes, pMatches, pNew2Old );
    Dau_DsdRemoveBraces( pRes, pMatches );
if ( fVerbose )
printf( "Replaced:\n" );
if ( fVerbose )
printf( "%s\n", pRes );
    Dau_DsdNormalize( pRes );
if ( fVerbose )
printf( "Normalized:\n" );
if ( fVerbose )
printf( "%s\n", pRes );

    if ( fCheck )
    {
        pt = Dau_DsdToTruth( pRes, nVars );
        if ( !Abc_TtEqual( pParts[2], pt, Abc_TtWordNum(nVars) ) )
            printf( "Dau_DsdMerge(): Verification failed!\n" );
    }

    if ( Status == 0 )
        s_TimeComp[1] += Abc_Clock() - clk;
    else
        s_TimeComp[2] += Abc_Clock() - clk;
    return pRes;
}
Exemple #3
0
int Dau_DsdConstruct( char * pDsd, Dau_Dsd_t * pStore )
{
    Dau_Dsd_t * pLevel[DAU_MAX_VAR];
    Dau_Dsd_t * q = pStore;
    int d = -1, fCompl = 0;
    if ( Dau_DsdIsConst(pDsd) )
    {
        Dau_DsdClean( q );
        q->Type   = DAU_DSD_CONST0;
        q->fCompl = Dau_DsdIsConst1(pDsd);
        return 1;
    }
    for ( --q; *pDsd; pDsd++ )
    {
        if ( *pDsd == '!' )
        {
            fCompl ^= 1;
            continue;
        }
        if ( *pDsd == ')' || *pDsd == ']' || *pDsd == '>' || *pDsd == '}' )
        {
            assert( fCompl == 0 );
            if ( --d >= 0 )
            {
                pLevel[d]->nFans++;
                if ( pLevel[d]->Data > pLevel[d+1]->Data )
                    pLevel[d]->Data = pLevel[d+1]->Data;
            }
            continue;
        }
        Dau_DsdClean( ++q );
        q->Data = 31;
        q->fCompl = fCompl;
        fCompl = 0;
        if ( *pDsd >= 'a' && *pDsd <= 'z' )
        {
            q->Type   = DAU_DSD_VAR;
            q->iVar   = *pDsd - 'a';
            q->Depth  = d + 1;
            if ( d >= 0 )
            {
                pLevel[d]->nFans++;
                if ( pLevel[d]->Data > q->iVar )
                    pLevel[d]->Data = q->iVar;
            }
            continue;
        }
        if ( *pDsd == '(' )
            q->Type = DAU_DSD_AND;
        else if ( *pDsd == '[' )
            q->Type = DAU_DSD_XOR;
        else if ( *pDsd == '<' )
            q->Type = DAU_DSD_MUX;
        else if ( *pDsd == '{' )
            q->Type = DAU_DSD_PRIME;
        else assert( 0 );
        pLevel[++d] = q;
        q->Depth = d;
    }
    assert( d == -1 );
    Dau_DsdClean( ++q );
    return q - pStore;
}