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/**CFile****************************************************************
FileName [plaSimple.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [SOP manager.]
Synopsis [Scalable SOP transformations.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - March 18, 2015.]
Revision [$Id: plaSimple.c,v 1.00 2014/09/12 00:00:00 alanmi Exp $]
***********************************************************************/
#include "pla.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Dump PLA manager into a BLIF file.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Pla_ManDumpPla( Pla_Man_t * p, char * pFileName )
{
// find the number of original variables
//int nVarsInit = Pla_ManDivNum(p) ? Vec_IntCountZero(&p->vDivs) : Pla_ManInNum(p);
FILE * pFile = fopen( pFileName, "wb" );
if ( pFile == NULL )
printf( "Cannot open file \"%s\" for writing.\n", pFileName );
else
{
//char * pLits = "-01?";
Vec_Str_t * vStr;
Vec_Int_t * vCube;
int i, k, Lit;
// comment
fprintf( pFile, "# PLA file written via PLA package in ABC on " );
fprintf( pFile, "%s", Extra_TimeStamp() );
fprintf( pFile, "\n\n" );
// header
fprintf( pFile, ".i %d\n", Pla_ManInNum(p) );
fprintf( pFile, ".o %d\n", 1 );
fprintf( pFile, ".p %d\n", Vec_WecSize(&p->vCubeLits) );
// SOP
vStr = Vec_StrStart( Pla_ManInNum(p) + 1 );
Vec_WecForEachLevel( &p->vCubeLits, vCube, i )
{
if ( !Vec_IntSize(vCube) )
continue;
for ( k = 0; k < Pla_ManInNum(p); k++ )
Vec_StrWriteEntry( vStr, k, '-' );
Vec_IntForEachEntry( vCube, Lit, k )
Vec_StrWriteEntry( vStr, Abc_Lit2Var(Lit), (char)(Abc_LitIsCompl(Lit) ? '0' : '1') );
fprintf( pFile, "%s 1\n", Vec_StrArray(vStr) );
}
Vec_StrFree( vStr );
fprintf( pFile, ".e\n\n" );
fclose( pFile );
printf( "Written file \"%s\".\n", pFileName );
}
}
void Pla_ManDumpBlif( Pla_Man_t * p, char * pFileName )
{
// find the number of original variables
int nVarsInit = Pla_ManDivNum(p) ? Vec_IntCountZero(&p->vDivs) : Pla_ManInNum(p);
FILE * pFile = fopen( pFileName, "wb" );
if ( pFile == NULL )
printf( "Cannot open file \"%s\" for writing.\n", pFileName );
else
{
//char * pLits = "-01?";
Vec_Str_t * vStr;
Vec_Int_t * vCube;
int i, k, Lit, Div;
// comment
fprintf( pFile, "# BLIF file written via PLA package in ABC on " );
fprintf( pFile, "%s", Extra_TimeStamp() );
fprintf( pFile, "\n\n" );
// header
fprintf( pFile, ".model %s\n", Pla_ManName(p) );
fprintf( pFile, ".inputs" );
for ( i = 0; i < nVarsInit; i++ )
fprintf( pFile, " i%d", i );
fprintf( pFile, "\n" );
fprintf( pFile, ".outputs o" );
fprintf( pFile, "\n" );
// SOP
fprintf( pFile, ".names" );
for ( i = 0; i < Pla_ManInNum(p); i++ )
fprintf( pFile, " i%d", i );
fprintf( pFile, " o\n" );
vStr = Vec_StrStart( Pla_ManInNum(p) + 1 );
Vec_WecForEachLevel( &p->vCubeLits, vCube, i )
{
for ( k = 0; k < Pla_ManInNum(p); k++ )
Vec_StrWriteEntry( vStr, k, '-' );
Vec_IntForEachEntry( vCube, Lit, k )
Vec_StrWriteEntry( vStr, Abc_Lit2Var(Lit), (char)(Abc_LitIsCompl(Lit) ? '0' : '1') );
fprintf( pFile, "%s 1\n", Vec_StrArray(vStr) );
}
Vec_StrFree( vStr );
// divisors
Vec_IntForEachEntryStart( &p->vDivs, Div, i, nVarsInit )
{
int pLits[3] = { (Div >> 2) & 0x3FF, (Div >> 12) & 0x3FF, (Div >> 22) & 0x3FF };
fprintf( pFile, ".names" );
fprintf( pFile, " i%d", Abc_Lit2Var(pLits[0]) );
fprintf( pFile, " i%d", Abc_Lit2Var(pLits[1]) );
if ( (Div & 3) == 3 ) // MUX
fprintf( pFile, " i%d", Abc_Lit2Var(pLits[2]) );
fprintf( pFile, " i%d\n", i );
if ( (Div & 3) == 1 ) // AND
fprintf( pFile, "%d%d 1\n", !Abc_LitIsCompl(pLits[0]), !Abc_LitIsCompl(pLits[1]) );
else if ( (Div & 3) == 2 ) // XOR
{
assert( !Abc_LitIsCompl(pLits[0]) );
assert( !Abc_LitIsCompl(pLits[1]) );
fprintf( pFile, "10 1\n01 1\n" );
}
else if ( (Div & 3) == 3 ) // MUX
{
assert( !Abc_LitIsCompl(pLits[1]) );
assert( !Abc_LitIsCompl(pLits[2]) );
fprintf( pFile, "%d-0 1\n-11 1\n", !Abc_LitIsCompl(pLits[0]) );
}
else assert( 0 );
}
fprintf( pFile, ".end\n\n" );
fclose( pFile );
printf( "Written file \"%s\".\n", pFileName );
}
}
/**Function*************************************************************
Synopsis [Transforms truth table into an SOP manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Pla_ManExpendDirNum( word * pOn, int nBits, int iMint, int * pVars )
{
int v, nVars = 0;
for ( v = 0; v < nBits; v++ )
if ( Pla_TtGetBit(pOn, iMint ^ (1 << v)) )
pVars[nVars++] = v;
return nVars;
}
void Pla_PrintBinary( word * pT, int nBits )
{
int v;
for ( v = 0; v < nBits; v++ )
printf( "%d", Pla_TtGetBit(pT, v) );
printf( "\n" );
}
Vec_Wrd_t * Pla_ManFxMinimize( word * pOn, int nVars )
{
int i, v, iMint, iVar, nMints = (1 << nVars);
int nWords = Abc_Bit6WordNum( nMints );
Vec_Wrd_t * vCubes = Vec_WrdAlloc( 1000 );
word * pDc = ABC_CALLOC( word, nWords );
int Count[32] = {0};
int Cubes[32] = {0};
Vec_Int_t * vStore = Vec_IntAlloc( 1000 );
// count the number of expansion directions
for ( i = 0; i < nMints; i++ )
if ( Pla_TtGetBit(pOn, i) && !Pla_TtGetBit(pDc, i) )
{
int pDirs[32], nDirs = Pla_ManExpendDirNum(pOn, nVars, i, pDirs);
Count[nDirs]++;
if ( nDirs == 0 )
{
Pla_TtSetBit(pDc, i);
Cubes[0]++;
// save
Vec_IntPushTwo( vStore, i, -1 );
continue;
}
if ( nDirs == 1 )
{
//Pla_PrintBinary( (word *)&i, nVars );
//printf( " %d \n", pDirs[0] );
Pla_TtSetBit(pDc, i);
Pla_TtSetBit(pDc, i ^ (1 << pDirs[0]));
Cubes[1]++;
// save
Vec_IntPushTwo( vStore, i, pDirs[0] );
continue;
}
if ( nDirs == 2 && Pla_TtGetBit(pOn, i ^ (1 << pDirs[0]) ^ (1 << pDirs[1])) )
{
assert( 0 );
Pla_TtSetBit(pDc, i);
Pla_TtSetBit(pDc, i ^ (1 << pDirs[0]));
Pla_TtSetBit(pDc, i ^ (1 << pDirs[1]));
Pla_TtSetBit(pDc, i ^ (1 << pDirs[0]) ^ (1 << pDirs[1]));
Cubes[2]++;
continue;
}
}
// go through the remaining cubes
for ( i = 0; i < nMints; i++ )
if ( Pla_TtGetBit(pOn, i) && !Pla_TtGetBit(pDc, i) )
{
int pDirs[32], nDirs = Pla_ManExpendDirNum(pOn, nVars, i, pDirs);
// find direction, which is not taken
for ( v = 0; v < nDirs; v++ )
if ( Pla_TtGetBit(pOn, i ^ (1 << pDirs[v])) && !Pla_TtGetBit(pDc, i ^ (1 << pDirs[v])) )
break;
// if there is no open directions, use any one
if ( v == nDirs )
v = 0;
// mark this one
Pla_TtSetBit(pDc, i);
Pla_TtSetBit(pDc, i ^ (1 << pDirs[v]));
Cubes[10]++;
// save
Vec_IntPushTwo( vStore, i, pDirs[v] );
continue;
}
printf( "\n" );
printf( "Truth = %d. ", Pla_TtCountOnes(pOn, nWords) );
printf( "Cover = %d. ", Pla_TtCountOnes(pDc, nWords) );
printf( "\n" );
printf( "Count: " );
for ( i = 0; i < 16; i++ )
if ( Count[i] )
printf( "%d=%d ", i, Count[i] );
printf( "\n" );
printf( "Cubes: " );
for ( i = 0; i < 16; i++ )
if ( Cubes[i] )
printf( "%d=%d ", i, Cubes[i] );
printf( "\n" );
/*
// extract cubes one at a time
for ( i = 0; i < nMints; i++ )
if ( Pla_TtGetBit(pOn, i) )
{
word Cube = 0;
for ( v = 0; v < nVars; v++ )
if ( (i >> v) & 1 )
Pla_CubeSetLit( &Cube, v, PLA_LIT_ONE );
else
Pla_CubeSetLit( &Cube, v, PLA_LIT_ZERO );
Vec_WrdPush( vCubes, Cube );
}
*/
Vec_IntForEachEntryDouble( vStore, iMint, iVar, i )
{
word Cube = 0;
for ( v = 0; v < nVars; v++ )
{
if ( v == iVar )
continue;
if ( (iMint >> v) & 1 )
Pla_CubeSetLit( &Cube, v, PLA_LIT_ONE );
else
Pla_CubeSetLit( &Cube, v, PLA_LIT_ZERO );
}
Vec_WrdPush( vCubes, Cube );
}
Vec_IntFree( vStore );
// collect the minterms
ABC_FREE( pDc );
return vCubes;
}
Pla_Man_t * Pla_ManFxPrepare( int nVars )
{
Pla_Man_t * p; char Buffer[1000];
Vec_Bit_t * vFunc = Pla_ManPrimesTable( nVars );
Vec_Wrd_t * vSop = Pla_ManFxMinimize( (word *)Vec_BitArray(vFunc), nVars );
word Cube, * pCube = &Cube; int i, k, Lit;
sprintf( Buffer, "primes%02d", nVars );
p = Pla_ManAlloc( Buffer, nVars, 1, Vec_WrdSize(vSop) );
Vec_WecInit( &p->vCubeLits, Pla_ManCubeNum(p) );
Vec_WecInit( &p->vOccurs, 2*Pla_ManInNum(p) );
Vec_WrdForEachEntry( vSop, Cube, i )
Pla_CubeForEachLit( nVars, pCube, Lit, k )
if ( Lit != PLA_LIT_DASH )
{
Lit = Abc_Var2Lit( k, Lit == PLA_LIT_ZERO );
Vec_WecPush( &p->vCubeLits, i, Lit );
Vec_WecPush( &p->vOccurs, Lit, i );
}
Vec_BitFree( vFunc );
Vec_WrdFree( vSop );
return p;
}
int Pla_ManFxPerformSimple( int nVars )
{
char Buffer[100];
Pla_Man_t * p = Pla_ManFxPrepare( nVars );
sprintf( Buffer, "primesmin%02d.pla", nVars );
Pla_ManDumpPla( p, Buffer );
Pla_ManFree( p );
return 1;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
|
