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/**CFile****************************************************************
FileName [lpkInt.h]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Fast Boolean matching for LUT structures.]
Synopsis [Internal declarations.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - April 28, 2007.]
Revision [$Id: lpkInt.h,v 1.00 2007/04/28 00:00:00 alanmi Exp $]
***********************************************************************/
#ifndef ABC__opt__lpk__lpkInt_h
#define ABC__opt__lpk__lpkInt_h
////////////////////////////////////////////////////////////////////////
/// INCLUDES ///
////////////////////////////////////////////////////////////////////////
#include "src/base/abc/abc.h"
#include "src/bool/kit/kit.h"
#include "src/map/if/if.h"
#include "lpk.h"
////////////////////////////////////////////////////////////////////////
/// PARAMETERS ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_HEADER_START
////////////////////////////////////////////////////////////////////////
/// BASIC TYPES ///
////////////////////////////////////////////////////////////////////////
#define LPK_SIZE_MAX 24 // the largest size of the function
#define LPK_CUTS_MAX 512 // the largest number of cuts considered
typedef struct Lpk_Man_t_ Lpk_Man_t;
typedef struct Lpk_Cut_t_ Lpk_Cut_t;
struct Lpk_Cut_t_
{
unsigned nLeaves : 6; // (L) the number of leaves
unsigned nNodes : 6; // (M) the number of nodes
unsigned nNodesDup : 6; // (Q) nodes outside of MFFC
unsigned nLuts : 6; // (N) the number of LUTs to try
unsigned unused : 6; // unused
unsigned fHasDsd : 1; // set to 1 if the cut has structural DSD (and so cannot be used)
unsigned fMark : 1; // multipurpose mark
unsigned uSign[2]; // the signature
float Weight; // the weight of the cut: (M - Q)/N(V) (the larger the better)
int Gain; // the gain achieved using this cut
int pLeaves[LPK_SIZE_MAX]; // the leaves of the cut
int pNodes[LPK_SIZE_MAX]; // the nodes of the cut
};
struct Lpk_Man_t_
{
// parameters
Lpk_Par_t * pPars; // the set of parameters
// current representation
Abc_Ntk_t * pNtk; // the network
Abc_Obj_t * pObj; // the node to resynthesize
// cut representation
int nMffc; // the size of MFFC of the node
int nCuts; // the total number of cuts
int nCutsMax; // the largest possible number of cuts
int nEvals; // the number of good cuts
Lpk_Cut_t pCuts[LPK_CUTS_MAX]; // the storage for cuts
int pEvals[LPK_CUTS_MAX]; // the good cuts
// visited nodes
Vec_Vec_t * vVisited;
// mapping manager
If_Man_t * pIfMan;
Vec_Int_t * vCover;
Vec_Vec_t * vLevels;
// temporary variables
int fCofactoring; // working in the cofactoring mode
int fCalledOnce; // limits the depth of MUX cofactoring
int nCalledSRed; // the number of called to SRed
int pRefs[LPK_SIZE_MAX]; // fanin reference counters
int pCands[LPK_SIZE_MAX]; // internal nodes pointing only to the leaves
Vec_Ptr_t * vLeaves;
// truth table representation
Vec_Ptr_t * vTtElems; // elementary truth tables
Vec_Ptr_t * vTtNodes; // storage for temporary truth tables of the nodes
Vec_Int_t * vMemory;
Vec_Int_t * vBddDir;
Vec_Int_t * vBddInv;
unsigned puSupps[32]; // the supports of the cofactors
unsigned * ppTruths[5][16];
// variable sets
Vec_Int_t * vSets[8];
Kit_DsdMan_t* pDsdMan;
// statistics
int nNodesTotal; // total number of nodes
int nNodesOver; // nodes with cuts over the limit
int nCutsTotal; // total number of cuts
int nCutsUseful; // useful cuts
int nGainTotal; // the gain in LUTs
int nChanges; // the number of changed nodes
int nBenefited; // the number of gainful that benefited from decomposition
int nMuxes;
int nDsds;
int nTotalNets;
int nTotalNets2;
int nTotalNodes;
int nTotalNodes2;
// counter of non-DSD blocks
int nBlocks[17];
// runtime
clock_t timeCuts;
clock_t timeTruth;
clock_t timeSupps;
clock_t timeTruth2;
clock_t timeTruth3;
clock_t timeEval;
clock_t timeMap;
clock_t timeOther;
clock_t timeTotal;
// runtime of eval
clock_t timeEvalMuxAn;
clock_t timeEvalMuxSp;
clock_t timeEvalDsdAn;
clock_t timeEvalDsdSp;
};
// internal representation of the function to be decomposed
typedef struct Lpk_Fun_t_ Lpk_Fun_t;
struct Lpk_Fun_t_
{
Vec_Ptr_t * vNodes; // the array of leaves and decomposition nodes
unsigned Id : 7; // the ID of this node
unsigned nVars : 5; // the number of variables
unsigned nLutK : 4; // the number of LUT inputs
unsigned nAreaLim : 5; // the area limit (the largest allowed)
unsigned nDelayLim : 9; // the delay limit (the largest allowed)
unsigned fSupports : 1; // supports of cofactors were precomputed
unsigned fMark : 1; // marks the MUX-based dec
unsigned uSupp; // the support of this component
unsigned puSupps[32]; // the supports of the cofactors
char pDelays[16]; // the delays of the inputs
char pFanins[16]; // the fanins of this function
unsigned pTruth[0]; // the truth table (contains room for three truth tables)
};
// preliminary decomposition result
typedef struct Lpk_Res_t_ Lpk_Res_t;
struct Lpk_Res_t_
{
int nBSVars; // the number of bound set variables
unsigned BSVars; // the bound set
int nCofVars; // the number of cofactoring variables
char pCofVars[4]; // the cofactoring variables
int nSuppSizeS; // support size of the smaller (decomposed) function
int nSuppSizeL; // support size of the larger (composition) function
int DelayEst; // estimated delay of the decomposition
int AreaEst; // estimated area of the decomposition
int Variable; // variable in MUX decomposition
int Polarity; // polarity in MUX decomposition
};
static inline int Lpk_LutNumVars( int nLutsLim, int nLutK ) { return nLutsLim * (nLutK - 1) + 1; }
static inline int Lpk_LutNumLuts( int nVarsMax, int nLutK ) { return (nVarsMax - 1) / (nLutK - 1) + (int)((nVarsMax - 1) % (nLutK - 1) > 0); }
static inline unsigned * Lpk_FunTruth( Lpk_Fun_t * p, int Num ) { assert( Num < 3 ); return p->pTruth + Kit_TruthWordNum(p->nVars) * Num; }
////////////////////////////////////////////////////////////////////////
/// MACRO DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// ITERATORS ///
////////////////////////////////////////////////////////////////////////
#define Lpk_CutForEachLeaf( pNtk, pCut, pObj, i ) \
for ( i = 0; (i < (int)(pCut)->nLeaves) && (((pObj) = Abc_NtkObj(pNtk, (pCut)->pLeaves[i])), 1); i++ )
#define Lpk_CutForEachNode( pNtk, pCut, pObj, i ) \
for ( i = 0; (i < (int)(pCut)->nNodes) && (((pObj) = Abc_NtkObj(pNtk, (pCut)->pNodes[i])), 1); i++ )
#define Lpk_CutForEachNodeReverse( pNtk, pCut, pObj, i ) \
for ( i = (int)(pCut)->nNodes - 1; (i >= 0) && (((pObj) = Abc_NtkObj(pNtk, (pCut)->pNodes[i])), 1); i-- )
#define Lpk_SuppForEachVar( Supp, Var )\
for ( Var = 0; Var < 16; Var++ )\
if ( !(Supp & (1<<Var)) ) {} else
////////////////////////////////////////////////////////////////////////
/// FUNCTION DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
/*=== lpkAbcDec.c ============================================================*/
extern Abc_Obj_t * Lpk_Decompose( Lpk_Man_t * pMan, Abc_Ntk_t * pNtk, Vec_Ptr_t * vLeaves, unsigned * pTruth, unsigned * puSupps, int nLutK, int AreaLim, int DelayLim );
/*=== lpkAbcDsd.c ============================================================*/
extern Lpk_Res_t * Lpk_DsdAnalize( Lpk_Man_t * pMan, Lpk_Fun_t * p, int nShared );
extern Lpk_Fun_t * Lpk_DsdSplit( Lpk_Man_t * pMan, Lpk_Fun_t * p, char * pCofVars, int nCofVars, unsigned uBoundSet );
/*=== lpkAbcMux.c ============================================================*/
extern Lpk_Res_t * Lpk_MuxAnalize( Lpk_Man_t * pMan, Lpk_Fun_t * p );
extern Lpk_Fun_t * Lpk_MuxSplit( Lpk_Man_t * pMan, Lpk_Fun_t * p, int Var, int Pol );
/*=== lpkAbcUtil.c ============================================================*/
extern Lpk_Fun_t * Lpk_FunAlloc( int nVars );
extern void Lpk_FunFree( Lpk_Fun_t * p );
extern Lpk_Fun_t * Lpk_FunCreate( Abc_Ntk_t * pNtk, Vec_Ptr_t * vLeaves, unsigned * pTruth, int nLutK, int AreaLim, int DelayLim );
extern Lpk_Fun_t * Lpk_FunDup( Lpk_Fun_t * p, unsigned * pTruth );
extern int Lpk_FunSuppMinimize( Lpk_Fun_t * p );
extern void Lpk_FunComputeCofSupps( Lpk_Fun_t * p );
extern int Lpk_SuppDelay( unsigned uSupp, char * pDelays );
extern int Lpk_SuppToVars( unsigned uBoundSet, char * pVars );
/*=== lpkCut.c =========================================================*/
extern unsigned * Lpk_CutTruth( Lpk_Man_t * p, Lpk_Cut_t * pCut, int fInv );
extern int Lpk_NodeCuts( Lpk_Man_t * p );
/*=== lpkMap.c =========================================================*/
extern Lpk_Man_t * Lpk_ManStart( Lpk_Par_t * pPars );
extern void Lpk_ManStop( Lpk_Man_t * p );
/*=== lpkMap.c =========================================================*/
extern If_Obj_t * Lpk_MapPrime( Lpk_Man_t * p, unsigned * pTruth, int nVars, If_Obj_t ** ppLeaves );
extern If_Obj_t * Lpk_MapTree_rec( Lpk_Man_t * p, Kit_DsdNtk_t * pNtk, If_Obj_t ** ppLeaves, int iLit, If_Obj_t * pResult );
/*=== lpkMulti.c =======================================================*/
extern If_Obj_t * Lpk_MapTreeMulti( Lpk_Man_t * p, unsigned * pTruth, int nLeaves, If_Obj_t ** ppLeaves );
/*=== lpkMux.c =========================================================*/
extern If_Obj_t * Lpk_MapTreeMux_rec( Lpk_Man_t * p, unsigned * pTruth, int nVars, If_Obj_t ** ppLeaves );
extern If_Obj_t * Lpk_MapSuppRedDec_rec( Lpk_Man_t * p, unsigned * pTruth, int nVars, If_Obj_t ** ppLeaves );
/*=== lpkSets.c =========================================================*/
extern unsigned Lpk_MapSuppRedDecSelect( Lpk_Man_t * p, unsigned * pTruth, int nVars, int * piVar, int * piVarReused );
ABC_NAMESPACE_HEADER_END
#endif
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
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