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|
/**CFile****************************************************************
FileName [kitPla.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Computation kit.]
Synopsis [Manipulating SOP in the form of a C-string.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - Dec 6, 2006.]
Revision [$Id: kitPla.c,v 1.00 2006/12/06 00:00:00 alanmi Exp $]
***********************************************************************/
#include "kit.h"
#include "aig.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Checks if the cover is constant 0.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Kit_PlaIsConst0( char * pSop )
{
return pSop[0] == ' ' && pSop[1] == '0';
}
/**Function*************************************************************
Synopsis [Checks if the cover is constant 1.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Kit_PlaIsConst1( char * pSop )
{
return pSop[0] == ' ' && pSop[1] == '1';
}
/**Function*************************************************************
Synopsis [Checks if the cover is a buffer.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Kit_PlaIsBuf( 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 an inverter.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Kit_PlaIsInv( 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 [Reads the number of variables in the cover.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Kit_PlaGetVarNum( char * pSop )
{
char * pCur;
for ( pCur = pSop; *pCur != '\n'; pCur++ );
return pCur - pSop - 2;
}
/**Function*************************************************************
Synopsis [Reads the number of cubes in the cover.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Kit_PlaGetCubeNum( char * pSop )
{
char * pCur;
int nCubes = 0;
if ( pSop == NULL )
return 0;
for ( pCur = pSop; *pCur; pCur++ )
nCubes += (*pCur == '\n');
return nCubes;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Kit_PlaIsComplement( char * pSop )
{
char * pCur;
for ( pCur = pSop; *pCur; pCur++ )
if ( *pCur == '\n' )
return (int)(*(pCur - 1) == '0' || *(pCur - 1) == 'n');
assert( 0 );
return 0;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Kit_PlaComplement( 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 if ( *(pCur - 1) == 'x' )
*(pCur - 1) = 'n';
else if ( *(pCur - 1) == 'n' )
*(pCur - 1) = 'x';
else
assert( 0 );
}
}
/**Function*************************************************************
Synopsis [Creates the constant 1 cover with the given number of variables and cubes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
char * Kit_PlaStart( void * p, int nCubes, int nVars )
{
Aig_MmFlex_t * pMan = p;
char * pSopCover, * pCube;
int i, Length;
Length = nCubes * (nVars + 3);
pSopCover = Aig_MmFlexEntryFetch( pMan, Length + 1 );
memset( pSopCover, '-', Length );
pSopCover[Length] = 0;
for ( i = 0; i < nCubes; i++ )
{
pCube = pSopCover + i * (nVars + 3);
pCube[nVars + 0] = ' ';
pCube[nVars + 1] = '1';
pCube[nVars + 2] = '\n';
}
return pSopCover;
}
/**Function*************************************************************
Synopsis [Creates the cover from the ISOP computed from TT.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
char * Kit_PlaCreateFromIsop( void * p, int nVars, Vec_Int_t * vCover )
{
Aig_MmFlex_t * pMan = p;
char * pSop, * pCube;
int i, k, Entry, Literal;
assert( Vec_IntSize(vCover) > 0 );
if ( Vec_IntSize(vCover) == 0 )
return NULL;
// start the cover
pSop = Kit_PlaStart( pMan, Vec_IntSize(vCover), nVars );
// create cubes
Vec_IntForEachEntry( vCover, Entry, i )
{
pCube = pSop + i * (nVars + 3);
for ( k = 0; k < nVars; k++ )
{
Literal = 3 & (Entry >> (k << 1));
if ( Literal == 1 )
pCube[k] = '0';
else if ( Literal == 2 )
pCube[k] = '1';
else if ( Literal != 0 )
assert( 0 );
}
}
return pSop;
}
/**Function*************************************************************
Synopsis [Creates the cover from the ISOP computed from TT.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Kit_PlaToIsop( char * pSop, Vec_Int_t * vCover )
{
char * pCube;
int k, nVars, Entry;
nVars = Kit_PlaGetVarNum( pSop );
assert( nVars > 0 );
// create cubes
Vec_IntClear( vCover );
for ( pCube = pSop; *pCube; pCube += nVars + 3 )
{
Entry = 0;
for ( k = nVars - 1; k >= 0; k-- )
if ( pCube[k] == '0' )
Entry = (Entry << 2) | 1;
else if ( pCube[k] == '1' )
Entry = (Entry << 2) | 2;
else if ( pCube[k] == '-' )
Entry = (Entry << 2);
else
assert( 0 );
Vec_IntPush( vCover, Entry );
}
}
/**Function*************************************************************
Synopsis [Allocates memory and copies the SOP into it.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
char * Kit_PlaStoreSop( void * p, char * pSop )
{
Aig_MmFlex_t * pMan = p;
char * pStore;
pStore = Aig_MmFlexEntryFetch( pMan, strlen(pSop) + 1 );
strcpy( pStore, pSop );
return pStore;
}
/**Function*************************************************************
Synopsis [Transforms truth table into the SOP.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
char * Kit_PlaFromTruth( void * p, unsigned * pTruth, int nVars, Vec_Int_t * vCover )
{
Aig_MmFlex_t * pMan = p;
char * pSop;
int RetValue;
if ( Kit_TruthIsConst0(pTruth, nVars) )
return Kit_PlaStoreSop( pMan, " 0\n" );
if ( Kit_TruthIsConst1(pTruth, nVars) )
return Kit_PlaStoreSop( pMan, " 1\n" );
RetValue = Kit_TruthIsop( pTruth, nVars, vCover, 0 ); // 1 );
assert( RetValue == 0 || RetValue == 1 );
pSop = Kit_PlaCreateFromIsop( pMan, nVars, vCover );
if ( RetValue )
Kit_PlaComplement( pSop );
return pSop;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
|
