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|
/**CFile****************************************************************
FileName [abcSop.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Network and node package.]
Synopsis [Implementation of a simple SOP representation of nodes.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: abcSop.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "abc.h"
/*
The SOPs in this package are represented using char * strings.
For example, the SOP of the node:
.names c d0 d1 MUX
01- 1
1-1 1
is the string: "01- 1/n1-1 1/n" where '/n' is a single char.
*/
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Registers the cube string with the network.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
char * Abc_SopRegister( Extra_MmFlex_t * pMan, char * pName )
{
char * pRegName;
if ( pName == NULL ) return NULL;
pRegName = Extra_MmFlexEntryFetch( pMan, strlen(pName) + 1 );
strcpy( pRegName, pName );
return pRegName;
}
/**Function*************************************************************
Synopsis [Reads the number of cubes in the cover.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_SopGetCubeNum( char * pSop )
{
char * pCur;
int nCubes = 0;
if ( pSop == NULL )
return 0;
for ( pCur = pSop; *pCur; pCur++ )
nCubes += (*pCur == '\n');
return nCubes;
}
/**Function*************************************************************
Synopsis [Reads the number of SOP literals in the cover.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_SopGetLitNum( char * pSop )
{
char * pCur;
int nLits = 0;
if ( pSop == NULL )
return 0;
for ( pCur = pSop; *pCur; pCur++ )
{
nLits -= (*pCur == '\n');
nLits += (*pCur == '0' || *pCur == '1');
}
return nLits;
}
/**Function*************************************************************
Synopsis [Reads the number of variables in the cover.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_SopGetVarNum( char * pSop )
{
char * pCur;
for ( pCur = pSop; *pCur != '\n'; pCur++ );
return pCur - pSop - 2;
}
/**Function*************************************************************
Synopsis [Reads the phase of the cover.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_SopGetPhase( char * pSop )
{
int nVars = Abc_SopGetVarNum( pSop );
if ( pSop[nVars+1] == '0' )
return 0;
if ( pSop[nVars+1] == '1' )
return 1;
assert( 0 );
return -1;
}
/**Function*************************************************************
Synopsis [Checks if the cover is constant 0.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
bool Abc_SopIsConst0( char * pSop )
{
return pSop[0] == ' ' && pSop[1] == '0';
}
/**Function*************************************************************
Synopsis [Checks if the cover is constant 1.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
bool Abc_SopIsConst1( char * pSop )
{
return pSop[0] == ' ' && pSop[1] == '1';
}
/**Function*************************************************************
Synopsis [Checks if the cover is constant 1.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
bool Abc_SopIsBuf( char * pSop )
{
if ( pSop[4] != 0 )
return 0;
if ( (pSop[0] == '1' && pSop[2] == '1') || (pSop[0] == '0' && pSop[2] == '0') )
return 1;
return 0;
}
/**Function*************************************************************
Synopsis [Checks if the cover is constant 1.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
bool Abc_SopIsInv( char * pSop )
{
if ( pSop[4] != 0 )
return 0;
if ( (pSop[0] == '0' && pSop[2] == '1') || (pSop[0] == '1' && pSop[2] == '0') )
return 1;
return 0;
}
/**Function*************************************************************
Synopsis [Checks if the cover is AND with possibly complemented inputs.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
bool Abc_SopIsAndType( char * pSop )
{
char * pCur;
if ( Abc_SopGetCubeNum(pSop) != 1 )
return 0;
for ( pCur = pSop; *pCur != ' '; pCur++ )
if ( *pCur == '-' )
return 0;
return 1;
}
/**Function*************************************************************
Synopsis [Checks if the cover is OR with possibly complemented inputs.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
bool Abc_SopIsOrType( char * pSop )
{
char * pCube, * pCur;
int nVars, nLits, c;
nVars = Abc_SopGetVarNum( pSop );
for ( c = 0; ; c++ )
{
// get the cube
pCube = pSop + c * (nVars + 3);
if ( *pCube == 0 )
break;
// count the number of literals in the cube
nLits = 0;
for ( pCur = pCube; *pCur != ' '; pCur++ )
nLits += ( *pCur != '-' );
if ( nLits != 1 )
return 0;
}
return 1;
}
/**Function*************************************************************
Synopsis [Returns the i-th literal of the cover.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_SopGetIthCareLit( char * pSop, int i )
{
char * pCube;
int nVars, c;
nVars = Abc_SopGetVarNum( pSop );
for ( c = 0; ; c++ )
{
// get the cube
pCube = pSop + c * (nVars + 3);
if ( *pCube == 0 )
break;
// get the literal
if ( pCube[i] != '-' )
return pCube[i] - '0';
}
return -1;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_SopComplement( char * pSop )
{
char * pCur;
for ( pCur = pSop; *pCur; pCur++ )
if ( *pCur == '\n' )
{
if ( *(pCur - 1) == '0' )
*(pCur - 1) = '1';
else if ( *(pCur - 1) == '1' )
*(pCur - 1) = '0';
else
assert( 0 );
}
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
bool Abc_SopCheck( char * pSop, int nFanins )
{
char * pCubes, * pCubesOld;
int fFound0 = 0, fFound1 = 0;
// check the logic function of the node
for ( pCubes = pSop; *pCubes; pCubes++ )
{
// get the end of the next cube
for ( pCubesOld = pCubes; *pCubes != ' '; pCubes++ );
// compare the distance
if ( pCubes - pCubesOld != nFanins )
{
fprintf( stdout, "Abc_SopCheck: SOP has a mismatch between its cover and its fanins.\n" );
return 0;
}
// check the output values for this cube
pCubes++;
if ( *pCubes == '0' )
fFound0 = 1;
else if ( *pCubes == '1' )
fFound1 = 1;
else
{
fprintf( stdout, "Abc_SopCheck: SOP has a strange character in the output part of its cube.\n" );
return 0;
}
// check the last symbol (new line)
pCubes++;
if ( *pCubes != '\n' )
{
fprintf( stdout, "Abc_SopCheck: SOP has a cube without new line in the end.\n" );
return 0;
}
}
if ( fFound0 && fFound1 )
{
fprintf( stdout, "Abc_SopCheck: SOP has cubes in both phases.\n" );
return 0;
}
return 1;
}
/**Function*************************************************************
Synopsis [Writes the CNF of the SOP into file.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_SopWriteCnf( FILE * pFile, char * pClauses, Vec_Int_t * vVars )
{
char * pChar;
int i;
// check the logic function of the node
for ( pChar = pClauses; *pChar; pChar++ )
{
// write the clause
for ( i = 0; i < vVars->nSize; i++, pChar++ )
if ( *pChar == '0' )
fprintf( pFile, "%d ", vVars->pArray[i] );
else if ( *pChar == '1' )
fprintf( pFile, "%d ", -vVars->pArray[i] );
fprintf( pFile, "0\n" );
// check that the remainig part is fine
assert( *pChar == ' ' );
pChar++;
assert( *pChar == '1' );
pChar++;
assert( *pChar == '\n' );
}
}
/**Function*************************************************************
Synopsis [Adds the clauses of for the CNF to the solver.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_SopAddCnfToSolver( solver * pSat, char * pClauses, Vec_Int_t * vVars, Vec_Int_t * vTemp )
{
char * pChar;
int i, RetValue;
// check the logic function of the node
for ( pChar = pClauses; *pChar; pChar++ )
{
// add the clause
vTemp->nSize = 0;
for ( i = 0; i < vVars->nSize; i++, pChar++ )
if ( *pChar == '0' )
Vec_IntPush( vTemp, toLit(vVars->pArray[i]) );
else if ( *pChar == '1' )
Vec_IntPush( vTemp, neg(toLit(vVars->pArray[i])) );
// add the clause to the solver
RetValue = solver_addclause( pSat, vTemp->pArray, vTemp->pArray + vTemp->nSize );
assert( RetValue != 1 );
// check that the remainig part is fine
assert( *pChar == ' ' );
pChar++;
assert( *pChar == '1' );
pChar++;
assert( *pChar == '\n' );
}
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
|
