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/**CFile****************************************************************
FileName [dau.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: dau.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 ///
////////////////////////////////////////////////////////////////////////
#define USE4VARS 1
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Dau_TruthEnum()
{
int fUseTable = 1;
abctime clk = Abc_Clock();
#ifdef USE4VARS
int nVars = 4;
int nSizeW = 1 << 14;
char * pFileName = "tableW14.data";
#else
int nVars = 5;
int nSizeW = 1 << 30;
char * pFileName = "tableW30.data";
#endif
int nPerms = Extra_Factorial( nVars );
int nMints = 1 << nVars;
int * pPerm = Extra_PermSchedule( nVars );
int * pComp = Extra_GreyCodeSchedule( nVars );
word nFuncs = ((word)1 << (((word)1 << nVars)-1));
word * pPres = ABC_CALLOC( word, 1 << ((1<<nVars)-7) );
unsigned * pTable = fUseTable ? (unsigned *)ABC_CALLOC(word, nSizeW) : NULL;
Vec_Int_t * vNpns = Vec_IntAlloc( 1000 );
word tMask = Abc_Tt6Mask( 1 << nVars );
word tTemp, tCur;
int i, k;
if ( pPres == NULL )
{
printf( "Cannot alloc memory for marks.\n" );
return;
}
if ( pTable == NULL )
printf( "Cannot alloc memory for table.\n" );
for ( tCur = 0; tCur < nFuncs; tCur++ )
{
if ( (tCur & 0xFFFF) == 0 )
printf( "Finished %08x\n", (int)tCur ), fflush(stdout);
if ( Abc_TtGetBit(pPres, (int)tCur) )
continue;
//Extra_PrintBinary( stdout, (unsigned *)&tCur, 16 ); printf( " %04x\n", (int)tCur );
//Dau_DsdPrintFromTruth( &tCur, 4 ); printf( "\n" );
Vec_IntPush( vNpns, (int)tCur );
tTemp = tCur;
for ( i = 0; i < nPerms; i++ )
{
for ( k = 0; k < nMints; k++ )
{
if ( tCur < nFuncs )
{
if ( pTable ) pTable[(int)tCur] = tTemp;
Abc_TtSetBit( pPres, (int)tCur );
}
if ( (tMask & ~tCur) < nFuncs )
{
if ( pTable ) pTable[(int)(tMask & ~tCur)] = tTemp;
Abc_TtSetBit( pPres, (int)(tMask & ~tCur) );
}
tCur = Abc_Tt6Flip( tCur, pComp[k] );
}
tCur = Abc_Tt6SwapAdjacent( tCur, pPerm[i] );
}
assert( tTemp == tCur );
}
printf( "Computed %d NPN classes of %d variables. ", Vec_IntSize(vNpns), nVars );
Abc_PrintTime( 1, "Time", Abc_Clock() - clk );
fflush(stdout);
Vec_IntFree( vNpns );
ABC_FREE( pPres );
ABC_FREE( pPerm );
ABC_FREE( pComp );
// write into file
if ( pTable )
{
FILE * pFile = fopen( pFileName, "wb" );
int RetValue = fwrite( pTable, 8, nSizeW, pFile );
fclose( pFile );
ABC_FREE( pTable );
}
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
unsigned * Dau_ReadFile( char * pFileName, int nSizeW )
{
FILE * pFile = fopen( pFileName, "rb" );
unsigned * p = (unsigned *)ABC_CALLOC(word, nSizeW);
int RetValue = fread( p, sizeof(word), nSizeW, pFile );
fclose( pFile );
return p;
}
void Dau_AddFunction( word tCur, int nVars, unsigned * pTable, Vec_Int_t * vNpns )
{
int Digit = (1 << nVars)-1;
word tMask = Abc_Tt6Mask( 1 << nVars );
word tNorm = (tCur >> Digit) & 1 ? ~tCur : tCur;
unsigned t = (unsigned)tNorm & tMask;
unsigned tRep = pTable[t];
unsigned tRep2 = pTable[tRep & tMask];
assert( ((tNorm >> Digit) & 1) == 0 );
assert( (tRep & tMask) == (tRep2 & tMask) );
if ( (tRep2 >> 31) == 0 ) // first time
{
Vec_IntPush( vNpns, tRep2 );
pTable[tRep2] |= (1 << 31);
}
}
void Dau_NetworkEnum()
{
abctime clk = Abc_Clock();
int Limit = 1;
#ifdef USE4VARS
int nVars = 4;
int nSizeW = 1 << 14;
char * pFileName = "tableW14.data";
#else
int nVars = 5;
int nSizeW = 1 << 30;
char * pFileName = "tableW30.data";
#endif
unsigned * pTable = Dau_ReadFile( pFileName, nSizeW );
Vec_Int_t * vNpns = Vec_IntAlloc( 1000 );
int i, v, g, k, m, Entry, Count = 1, iPrev = 0, iLast = 1;
unsigned Inv = (unsigned)Abc_Tt6Mask(1 << (nVars-1));
pTable[0] |= (1 << 31);
pTable[Inv] |= (1 << 31);
Vec_IntPushTwo( vNpns, 0, Inv );
Vec_IntForEachEntryStart( vNpns, Entry, i, 1 )
{
word uTruth = (((word)Entry) << 32) | (word)Entry;
int nSupp = Abc_TtSupportSize( &uTruth, nVars );
//printf( "Exploring function %4d with %d vars: ", i, nSupp );
//printf( " %04x\n", (int)uTruth );
//Dau_DsdPrintFromTruth( &uTruth, 4 );
for ( v = 0; v < nSupp; v++ )
{
word Cof0 = Abc_Tt6Cofactor0( uTruth, nVars-1-v );
word Cof1 = Abc_Tt6Cofactor1( uTruth, nVars-1-v );
for ( g = 0; g < Limit; g++ )
{
if ( nSupp < nVars )
{
word tGate = g ? s_Truths6[nVars-1-v] ^ s_Truths6[nVars-1-nSupp] : s_Truths6[nVars-1-v] & s_Truths6[nVars-1-nSupp];
word tCur = (tGate & Cof1) | (~tGate & Cof0);
Dau_AddFunction( tCur, nVars, pTable, vNpns );
}
}
for ( g = 0; g < Limit; g++ )
{
// add one cross bar
for ( k = 0; k < nSupp; k++ ) if ( k != v )
{
word tGate = g ? s_Truths6[nVars-1-v] ^ s_Truths6[nVars-1-k] : s_Truths6[nVars-1-v] & s_Truths6[nVars-1-k];
word tCur = (tGate & Cof1) | (~tGate & Cof0);
Dau_AddFunction( tCur, nVars, pTable, vNpns );
if ( g == 0 ) // skip XOR
{
word tGate = s_Truths6[nVars-1-v] & ~s_Truths6[nVars-1-k];
word tCur = (tGate & Cof1) | (~tGate & Cof0);
Dau_AddFunction( tCur, nVars, pTable, vNpns );
}
}
}
for ( g = 0; g < Limit; g++ )
{
// add two cross bars
for ( k = 0; k < nSupp; k++ ) if ( k != v )
for ( m = k+1; m < nSupp; m++ ) if ( m != v )
{
word tGate = g ? s_Truths6[nVars-1-m] ^ s_Truths6[nVars-1-k] : s_Truths6[nVars-1-m] & s_Truths6[nVars-1-k];
word tCur = (tGate & Cof1) | (~tGate & Cof0);
Dau_AddFunction( tCur, nVars, pTable, vNpns );
if ( g == 0 ) // skip XOR
{
tGate = s_Truths6[nVars-1-m] & ~s_Truths6[nVars-1-k];
tCur = (tGate & Cof1) | (~tGate & Cof0);
Dau_AddFunction( tCur, nVars, pTable, vNpns );
tGate = ~s_Truths6[nVars-1-m] & s_Truths6[nVars-1-k];
tCur = (tGate & Cof1) | (~tGate & Cof0);
Dau_AddFunction( tCur, nVars, pTable, vNpns );
tGate = ~s_Truths6[nVars-1-m] & ~s_Truths6[nVars-1-k];
tCur = (tGate & Cof1) | (~tGate & Cof0);
Dau_AddFunction( tCur, nVars, pTable, vNpns );
}
}
}
}
if ( i == iLast )
{
//printf("Finished %d nodes with %d functions.\n", Count++, Vec_IntSize(vNpns) );
iPrev = iLast;
iLast = Vec_IntSize(vNpns)-1;
printf("Finished %d nodes with %d functions. ", Count++, iLast - iPrev );
Abc_PrintTime( 1, "Time", Abc_Clock() - clk );
fflush(stdout);
}
}
Vec_IntFree( vNpns );
ABC_FREE( pTable );
Abc_PrintTime( 1, "Time", Abc_Clock() - clk );
fflush(stdout);
}
void Dau_NetworkEnumTest()
{
Dau_TruthEnum();
Dau_NetworkEnum();
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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