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Diffstat (limited to 'src/aig/kit/kitSop.c')
-rw-r--r-- | src/aig/kit/kitSop.c | 570 |
1 files changed, 0 insertions, 570 deletions
diff --git a/src/aig/kit/kitSop.c b/src/aig/kit/kitSop.c deleted file mode 100644 index 3fa81351..00000000 --- a/src/aig/kit/kitSop.c +++ /dev/null @@ -1,570 +0,0 @@ -/**CFile**************************************************************** - - FileName [kitSop.c] - - SystemName [ABC: Logic synthesis and verification system.] - - PackageName [Computation kit.] - - Synopsis [Procedures involving SOPs.] - - Author [Alan Mishchenko] - - Affiliation [UC Berkeley] - - Date [Ver. 1.0. Started - Dec 6, 2006.] - - Revision [$Id: kitSop.c,v 1.00 2006/12/06 00:00:00 alanmi Exp $] - -***********************************************************************/ - -#include "kit.h" - -//////////////////////////////////////////////////////////////////////// -/// DECLARATIONS /// -//////////////////////////////////////////////////////////////////////// - -//////////////////////////////////////////////////////////////////////// -/// FUNCTION DEFINITIONS /// -//////////////////////////////////////////////////////////////////////// - -/**Function************************************************************* - - Synopsis [Creates SOP from the cube array.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Kit_SopCreate( Kit_Sop_t * cResult, Vec_Int_t * vInput, int nVars, Vec_Int_t * vMemory ) -{ - unsigned uCube; - int i; - // start the cover - cResult->nCubes = 0; - cResult->pCubes = Vec_IntFetch( vMemory, Vec_IntSize(vInput) ); - // add the cubes - Vec_IntForEachEntry( vInput, uCube, i ) - Kit_SopPushCube( cResult, uCube ); -} - -/**Function************************************************************* - - Synopsis [Creates SOP from the cube array.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Kit_SopCreateInverse( Kit_Sop_t * cResult, Vec_Int_t * vInput, int nLits, Vec_Int_t * vMemory ) -{ - unsigned uCube, uMask = 0; - int i, nCubes = Vec_IntSize(vInput); - // start the cover - cResult->nCubes = 0; - cResult->pCubes = Vec_IntFetch( vMemory, nCubes ); - // add the cubes -// Vec_IntForEachEntry( vInput, uCube, i ) - for ( i = 0; i < nCubes; i++ ) - { - uCube = Vec_IntEntry( vInput, i ); - uMask = ((uCube | (uCube >> 1)) & 0x55555555); - uMask |= (uMask << 1); - Kit_SopPushCube( cResult, uCube ^ uMask ); - } -} - -/**Function************************************************************* - - Synopsis [Duplicates SOP.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Kit_SopDup( Kit_Sop_t * cResult, Kit_Sop_t * cSop, Vec_Int_t * vMemory ) -{ - unsigned uCube; - int i; - // start the cover - cResult->nCubes = 0; - cResult->pCubes = Vec_IntFetch( vMemory, Kit_SopCubeNum(cSop) ); - // add the cubes - Kit_SopForEachCube( cSop, uCube, i ) - Kit_SopPushCube( cResult, uCube ); -} - -/**Function************************************************************* - - Synopsis [Derives the quotient of division by literal.] - - Description [Reduces the cover to be equal to the result of - division of the given cover by the literal.] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Kit_SopDivideByLiteralQuo( Kit_Sop_t * cSop, int iLit ) -{ - unsigned uCube; - int i, k = 0; - Kit_SopForEachCube( cSop, uCube, i ) - { - if ( Kit_CubeHasLit(uCube, iLit) ) - Kit_SopWriteCube( cSop, Kit_CubeRemLit(uCube, iLit), k++ ); - } - Kit_SopShrink( cSop, k ); -} - - -/**Function************************************************************* - - Synopsis [Divides cover by one cube.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Kit_SopDivideByCube( Kit_Sop_t * cSop, Kit_Sop_t * cDiv, Kit_Sop_t * vQuo, Kit_Sop_t * vRem, Vec_Int_t * vMemory ) -{ - unsigned uCube, uDiv; - int i; - // get the only cube - assert( Kit_SopCubeNum(cDiv) == 1 ); - uDiv = Kit_SopCube(cDiv, 0); - // allocate covers - vQuo->nCubes = 0; - vQuo->pCubes = Vec_IntFetch( vMemory, Kit_SopCubeNum(cSop) ); - vRem->nCubes = 0; - vRem->pCubes = Vec_IntFetch( vMemory, Kit_SopCubeNum(cSop) ); - // sort the cubes - Kit_SopForEachCube( cSop, uCube, i ) - { - if ( Kit_CubeContains( uCube, uDiv ) ) - Kit_SopPushCube( vQuo, Kit_CubeSharp(uCube, uDiv) ); - else - Kit_SopPushCube( vRem, uCube ); - } -} - -/**Function************************************************************* - - Synopsis [Divides cover by one cube.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Kit_SopDivideInternal( Kit_Sop_t * cSop, Kit_Sop_t * cDiv, Kit_Sop_t * vQuo, Kit_Sop_t * vRem, Vec_Int_t * vMemory ) -{ - unsigned uCube, uDiv, uCube2, uDiv2, uQuo; - int i, i2, k, k2, nCubesRem; - assert( Kit_SopCubeNum(cSop) >= Kit_SopCubeNum(cDiv) ); - // consider special case - if ( Kit_SopCubeNum(cDiv) == 1 ) - { - Kit_SopDivideByCube( cSop, cDiv, vQuo, vRem, vMemory ); - return; - } - // allocate quotient - vQuo->nCubes = 0; - vQuo->pCubes = Vec_IntFetch( vMemory, Kit_SopCubeNum(cSop) / Kit_SopCubeNum(cDiv) ); - // for each cube of the cover - // it either belongs to the quotient or to the remainder - Kit_SopForEachCube( cSop, uCube, i ) - { - // skip taken cubes - if ( Kit_CubeIsMarked(uCube) ) - continue; - // find a matching cube in the divisor - Kit_SopForEachCube( cDiv, uDiv, k ) - if ( Kit_CubeContains( uCube, uDiv ) ) - break; - // the cube is not found - if ( k == Kit_SopCubeNum(cDiv) ) - continue; - // the quotient cube exists - uQuo = Kit_CubeSharp( uCube, uDiv ); - // find corresponding cubes for other cubes of the divisor - Kit_SopForEachCube( cDiv, uDiv2, k2 ) - { - if ( k2 == k ) - continue; - // find a matching cube - Kit_SopForEachCube( cSop, uCube2, i2 ) - { - // skip taken cubes - if ( Kit_CubeIsMarked(uCube2) ) - continue; - // check if the cube can be used - if ( Kit_CubeContains( uCube2, uDiv2 ) && uQuo == Kit_CubeSharp( uCube2, uDiv2 ) ) - break; - } - // the case when the cube is not found - if ( i2 == Kit_SopCubeNum(cSop) ) - break; - } - // we did not find some cubes - continue looking at other cubes - if ( k2 != Kit_SopCubeNum(cDiv) ) - continue; - // we found all cubes - add the quotient cube - Kit_SopPushCube( vQuo, uQuo ); - - // mark the first cube - Kit_SopWriteCube( cSop, Kit_CubeMark(uCube), i ); - // mark other cubes that have this quotient - Kit_SopForEachCube( cDiv, uDiv2, k2 ) - { - if ( k2 == k ) - continue; - // find a matching cube - Kit_SopForEachCube( cSop, uCube2, i2 ) - { - // skip taken cubes - if ( Kit_CubeIsMarked(uCube2) ) - continue; - // check if the cube can be used - if ( Kit_CubeContains( uCube2, uDiv2 ) && uQuo == Kit_CubeSharp( uCube2, uDiv2 ) ) - break; - } - assert( i2 < Kit_SopCubeNum(cSop) ); - // the cube is found, mark it - // (later we will add all unmarked cubes to the remainder) - Kit_SopWriteCube( cSop, Kit_CubeMark(uCube2), i2 ); - } - } - // determine the number of cubes in the remainder - nCubesRem = Kit_SopCubeNum(cSop) - Kit_SopCubeNum(vQuo) * Kit_SopCubeNum(cDiv); - // allocate remainder - vRem->nCubes = 0; - vRem->pCubes = Vec_IntFetch( vMemory, nCubesRem ); - // finally add the remaining unmarked cubes to the remainder - // and clean the marked cubes in the cover - Kit_SopForEachCube( cSop, uCube, i ) - { - if ( !Kit_CubeIsMarked(uCube) ) - { - Kit_SopPushCube( vRem, uCube ); - continue; - } - Kit_SopWriteCube( cSop, Kit_CubeUnmark(uCube), i ); - } - assert( nCubesRem == Kit_SopCubeNum(vRem) ); -} - -/**Function************************************************************* - - Synopsis [Returns the common cube.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -static inline unsigned Kit_SopCommonCube( Kit_Sop_t * cSop ) -{ - unsigned uMask, uCube; - int i; - uMask = ~(unsigned)0; - Kit_SopForEachCube( cSop, uCube, i ) - uMask &= uCube; - return uMask; -} - -/**Function************************************************************* - - Synopsis [Makes the cover cube-free.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Kit_SopMakeCubeFree( Kit_Sop_t * cSop ) -{ - unsigned uMask, uCube; - int i; - uMask = Kit_SopCommonCube( cSop ); - if ( uMask == 0 ) - return; - // remove the common cube - Kit_SopForEachCube( cSop, uCube, i ) - Kit_SopWriteCube( cSop, Kit_CubeSharp(uCube, uMask), i ); -} - -/**Function************************************************************* - - Synopsis [Checks if the cover is cube-free.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Kit_SopIsCubeFree( Kit_Sop_t * cSop ) -{ - return Kit_SopCommonCube( cSop ) == 0; -} - -/**Function************************************************************* - - Synopsis [Creates SOP composes of the common cube of the given SOP.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Kit_SopCommonCubeCover( Kit_Sop_t * cResult, Kit_Sop_t * cSop, Vec_Int_t * vMemory ) -{ - assert( Kit_SopCubeNum(cSop) > 0 ); - cResult->nCubes = 0; - cResult->pCubes = Vec_IntFetch( vMemory, 1 ); - Kit_SopPushCube( cResult, Kit_SopCommonCube(cSop) ); -} - - -/**Function************************************************************* - - Synopsis [Find any literal that occurs more than once.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Kit_SopAnyLiteral( Kit_Sop_t * cSop, int nLits ) -{ - unsigned uCube; - int i, k, nLitsCur; - // go through each literal - for ( i = 0; i < nLits; i++ ) - { - // go through all the cubes - nLitsCur = 0; - Kit_SopForEachCube( cSop, uCube, k ) - if ( Kit_CubeHasLit(uCube, i) ) - nLitsCur++; - if ( nLitsCur > 1 ) - return i; - } - return -1; -} - -/**Function************************************************************* - - Synopsis [Find the least often occurring literal.] - - Description [Find the least often occurring literal among those - that occur more than once.] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Kit_SopWorstLiteral( Kit_Sop_t * cSop, int nLits ) -{ - unsigned uCube; - int i, k, iMin, nLitsMin, nLitsCur; - int fUseFirst = 1; - - // go through each literal - iMin = -1; - nLitsMin = 1000000; - for ( i = 0; i < nLits; i++ ) - { - // go through all the cubes - nLitsCur = 0; - Kit_SopForEachCube( cSop, uCube, k ) - if ( Kit_CubeHasLit(uCube, i) ) - 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 [Find the least often occurring literal.] - - Description [Find the least often occurring literal among those - that occur more than once.] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Kit_SopBestLiteral( Kit_Sop_t * cSop, int nLits, unsigned uMask ) -{ - unsigned uCube; - int i, k, iMax, nLitsMax, nLitsCur; - int fUseFirst = 1; - - // go through each literal - iMax = -1; - nLitsMax = -1; - for ( i = 0; i < nLits; i++ ) - { - if ( !Kit_CubeHasLit(uMask, i) ) - continue; - // go through all the cubes - nLitsCur = 0; - Kit_SopForEachCube( cSop, uCube, k ) - if ( Kit_CubeHasLit(uCube, i) ) - 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 ( nLitsMax < nLitsCur ) - { - nLitsMax = nLitsCur; - iMax = i; - } - } - else - { - if ( nLitsMax <= nLitsCur ) - { - nLitsMax = nLitsCur; - iMax = i; - } - } - } - if ( nLitsMax >= 0 ) - return iMax; - return -1; -} - -/**Function************************************************************* - - Synopsis [Computes a level-zero kernel.] - - Description [Modifies the cover to contain one level-zero kernel.] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Kit_SopDivisorZeroKernel_rec( Kit_Sop_t * cSop, int nLits ) -{ - int iLit; - // find any literal that occurs at least two times - iLit = Kit_SopWorstLiteral( cSop, nLits ); - if ( iLit == -1 ) - return; - // derive the cube-free quotient - Kit_SopDivideByLiteralQuo( cSop, iLit ); // the same cover - Kit_SopMakeCubeFree( cSop ); // the same cover - // call recursively - Kit_SopDivisorZeroKernel_rec( cSop, nLits ); // the same cover -} - -/**Function************************************************************* - - Synopsis [Computes the quick divisor of the cover.] - - Description [Returns 0, if there is no divisor other than trivial.] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -int Kit_SopDivisor( Kit_Sop_t * cResult, Kit_Sop_t * cSop, int nLits, Vec_Int_t * vMemory ) -{ - if ( Kit_SopCubeNum(cSop) <= 1 ) - return 0; - if ( Kit_SopAnyLiteral( cSop, nLits ) == -1 ) - return 0; - // duplicate the cover - Kit_SopDup( cResult, cSop, vMemory ); - // perform the kerneling - Kit_SopDivisorZeroKernel_rec( cResult, nLits ); - assert( Kit_SopCubeNum(cResult) > 0 ); - return 1; -} - - -/**Function************************************************************* - - Synopsis [Create the one-literal cover with the best literal from cSop.] - - Description [] - - SideEffects [] - - SeeAlso [] - -***********************************************************************/ -void Kit_SopBestLiteralCover( Kit_Sop_t * cResult, Kit_Sop_t * cSop, unsigned uCube, int nLits, Vec_Int_t * vMemory ) -{ - int iLitBest; - // get the best literal - iLitBest = Kit_SopBestLiteral( cSop, nLits, uCube ); - // start the cover - cResult->nCubes = 0; - cResult->pCubes = Vec_IntFetch( vMemory, 1 ); - // set the cube - Kit_SopPushCube( cResult, Kit_CubeSetLit(0, iLitBest) ); -} - - -//////////////////////////////////////////////////////////////////////// -/// END OF FILE /// -//////////////////////////////////////////////////////////////////////// - - |