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author | Alan Mishchenko <alanmi@berkeley.edu> | 2005-09-04 08:01:00 -0700 |
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committer | Alan Mishchenko <alanmi@berkeley.edu> | 2005-09-04 08:01:00 -0700 |
commit | 33012d9530c40817e1fc5230b3e663f7690b2e94 (patch) | |
tree | 4b782c372b9647ad8490103ee98d0affa54a3952 /src/misc/mvc/mvcLits.c | |
parent | dce73ade2fa0c7a01b58d4a6c592e0e07cbb5499 (diff) | |
download | abc-33012d9530c40817e1fc5230b3e663f7690b2e94.tar.gz abc-33012d9530c40817e1fc5230b3e663f7690b2e94.tar.bz2 abc-33012d9530c40817e1fc5230b3e663f7690b2e94.zip |
Version abc50904
Diffstat (limited to 'src/misc/mvc/mvcLits.c')
-rw-r--r-- | src/misc/mvc/mvcLits.c | 345 |
1 files changed, 345 insertions, 0 deletions
diff --git a/src/misc/mvc/mvcLits.c b/src/misc/mvc/mvcLits.c new file mode 100644 index 00000000..98211719 --- /dev/null +++ b/src/misc/mvc/mvcLits.c @@ -0,0 +1,345 @@ +/**CFile**************************************************************** + + FileName [mvcLits.c] + + PackageName [MVSIS 2.0: Multi-valued logic synthesis system.] + + Synopsis [Literal counting/updating procedures.] + + Author [MVSIS Group] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - February 1, 2003.] + + Revision [$Id: mvcLits.c,v 1.4 2003/04/03 06:31:50 alanmi Exp $] + +***********************************************************************/ + +#include "mvc.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Find the any literal that occurs more than once.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Mvc_CoverAnyLiteral( Mvc_Cover_t * pCover, Mvc_Cube_t * pMask ) +{ + Mvc_Cube_t * pCube; + int nWord, nBit, i; + int nLitsCur; + int fUseFirst = 0; + + // go through each literal + if ( fUseFirst ) + { + for ( i = 0; i < pCover->nBits; i++ ) + if ( !pMask || Mvc_CubeBitValue(pMask,i) ) + { + // get the word and bit of this literal + nWord = Mvc_CubeWhichWord(i); + nBit = Mvc_CubeWhichBit(i); + // go through all the cubes + nLitsCur = 0; + Mvc_CoverForEachCube( pCover, pCube ) + if ( pCube->pData[nWord] & (1<<nBit) ) + { + nLitsCur++; + if ( nLitsCur > 1 ) + return i; + } + } + } + else + { + for ( i = pCover->nBits - 1; i >=0; i-- ) + if ( !pMask || Mvc_CubeBitValue(pMask,i) ) + { + // get the word and bit of this literal + nWord = Mvc_CubeWhichWord(i); + nBit = Mvc_CubeWhichBit(i); + // go through all the cubes + nLitsCur = 0; + Mvc_CoverForEachCube( pCover, pCube ) + if ( pCube->pData[nWord] & (1<<nBit) ) + { + nLitsCur++; + if ( nLitsCur > 1 ) + return i; + } + } + } + return -1; +} + +/**Function************************************************************* + + Synopsis [Find the most often occurring literal.] + + Description [Find the most often occurring literal among those + that occur more than once.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Mvc_CoverBestLiteral( Mvc_Cover_t * pCover, Mvc_Cube_t * pMask ) +{ + Mvc_Cube_t * pCube; + int nWord, nBit; + int i, iMax, nLitsMax, nLitsCur; + int fUseFirst = 1; + + // go through each literal + iMax = -1; + nLitsMax = -1; + for ( i = 0; i < pCover->nBits; i++ ) + if ( !pMask || Mvc_CubeBitValue(pMask,i) ) + { + // get the word and bit of this literal + nWord = Mvc_CubeWhichWord(i); + nBit = Mvc_CubeWhichBit(i); + // go through all the cubes + nLitsCur = 0; + Mvc_CoverForEachCube( pCover, pCube ) + if ( pCube->pData[nWord] & (1<<nBit) ) + nLitsCur++; + + // check if this is the best literal + if ( fUseFirst ) + { + if ( nLitsMax < nLitsCur ) + { + nLitsMax = nLitsCur; + iMax = i; + } + } + else + { + if ( nLitsMax <= nLitsCur ) + { + nLitsMax = nLitsCur; + iMax = i; + } + } + } + + if ( nLitsMax > 1 ) + return iMax; + return -1; +} + +/**Function************************************************************* + + Synopsis [Find the most often occurring literal.] + + Description [Find the most often occurring literal among those + that occur more than once.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Mvc_CoverWorstLiteral( Mvc_Cover_t * pCover, Mvc_Cube_t * pMask ) +{ + Mvc_Cube_t * pCube; + int nWord, nBit; + int i, iMin, nLitsMin, nLitsCur; + int fUseFirst = 1; + + // go through each literal + iMin = -1; + nLitsMin = 1000000; + for ( i = 0; i < pCover->nBits; i++ ) + if ( !pMask || Mvc_CubeBitValue(pMask,i) ) + { + // get the word and bit of this literal + nWord = Mvc_CubeWhichWord(i); + nBit = Mvc_CubeWhichBit(i); + // go through all the cubes + nLitsCur = 0; + Mvc_CoverForEachCube( pCover, pCube ) + if ( pCube->pData[nWord] & (1<<nBit) ) + nLitsCur++; + + // skip the literal that does not occur or occurs once + if ( nLitsCur < 2 ) + continue; + + // check if this is the best literal + if ( fUseFirst ) + { + if ( nLitsMin > nLitsCur ) + { + nLitsMin = nLitsCur; + iMin = i; + } + } + else + { + if ( nLitsMin >= nLitsCur ) + { + nLitsMin = nLitsCur; + iMin = i; + } + } + } + + if ( nLitsMin < 1000000 ) + return iMin; + return -1; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Mvc_Cover_t * Mvc_CoverBestLiteralCover( Mvc_Cover_t * pCover, Mvc_Cover_t * pSimple ) +{ + Mvc_Cover_t * pCoverNew; + Mvc_Cube_t * pCubeNew; + Mvc_Cube_t * pCubeS; + int iLitBest; + + // create the new cover + pCoverNew = Mvc_CoverClone( pCover ); + // get the new cube + pCubeNew = Mvc_CubeAlloc( pCoverNew ); + // clean the cube + Mvc_CubeBitClean( pCubeNew ); + + // get the first cube of pSimple + assert( Mvc_CoverReadCubeNum(pSimple) == 1 ); + pCubeS = Mvc_CoverReadCubeHead( pSimple ); + // find the best literal among those of pCubeS + iLitBest = Mvc_CoverBestLiteral( pCover, pCubeS ); + + // insert this literal into the cube + Mvc_CubeBitInsert( pCubeNew, iLitBest ); + // add the cube to the cover + Mvc_CoverAddCubeTail( pCoverNew, pCubeNew ); + return pCoverNew; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Mvc_CoverFirstCubeFirstLit( Mvc_Cover_t * pCover ) +{ + Mvc_Cube_t * pCube; + int iBit, Value; + + // get the first cube + pCube = Mvc_CoverReadCubeHead( pCover ); + // get the first literal + Mvc_CubeForEachBit( pCover, pCube, iBit, Value ) + if ( Value ) + return iBit; + return -1; +} + +/**Function************************************************************* + + Synopsis [Returns the number of literals in the cover.] + + Description [Allocates storage for literal counters and fills it up + using the current information.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Mvc_CoverCountLiterals( Mvc_Cover_t * pCover ) +{ + Mvc_Cube_t * pCube; + int nWord, nBit; + int i, CounterTot, CounterCur; + + // allocate/clean the storage for literals +// Mvc_CoverAllocateArrayLits( pCover ); +// memset( pCover->pLits, 0, pCover->nBits * sizeof(int) ); + // go through each literal + CounterTot = 0; + for ( i = 0; i < pCover->nBits; i++ ) + { + // get the word and bit of this literal + nWord = Mvc_CubeWhichWord(i); + nBit = Mvc_CubeWhichBit(i); + // go through all the cubes + CounterCur = 0; + Mvc_CoverForEachCube( pCover, pCube ) + if ( pCube->pData[nWord] & (1<<nBit) ) + CounterCur++; + CounterTot += CounterCur; + } + return CounterTot; +} + +/**Function************************************************************* + + Synopsis [Returns the number of literals in the cover.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Mvc_CoverIsOneLiteral( Mvc_Cover_t * pCover ) +{ + Mvc_Cube_t * pCube; + int iBit, Counter, Value; + if ( Mvc_CoverReadCubeNum(pCover) != 1 ) + return 0; + pCube = Mvc_CoverReadCubeHead(pCover); + // count literals + Counter = 0; + Mvc_CubeForEachBit( pCover, pCube, iBit, Value ) + { + if ( Value ) + { + if ( Counter++ ) + return 0; + } + } + return 1; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + |