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/**CFile****************************************************************
FileName [fretime.h]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Flow-based retiming package.]
Synopsis [Header file for retiming package.]
Author [Aaron Hurst]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - January 1, 2008.]
Revision [$Id: fretime.h,v 1.00 2008/01/01 00:00:00 ahurst Exp $]
***********************************************************************/
#if !defined(RETIME_H_)
#define RETIME_H_
#include "abc.h"
ABC_NAMESPACE_HEADER_START
// #define IGNORE_TIMING
// #define DEBUG_PRINT_FLOWS
// #define DEBUG_VISITED
// #define DEBUG_PREORDER
#define DEBUG_CHECK
// #define DEBUG_PRINT_LEVELS
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
#define MAX_DIST 30000
// flags in Flow_Data structure...
#define VISITED_E 0x001
#define VISITED_R 0x002
#define VISITED (VISITED_E | VISITED_R)
#define FLOW 0x004
#define CROSS_BOUNDARY 0x008
#define BLOCK 0x010
#define INIT_0 0x020
#define INIT_1 0x040
#define INIT_CARE (INIT_0 | INIT_1)
#define CONSERVATIVE 0x080
#define BLOCK_OR_CONS (BLOCK | CONSERVATIVE)
#define BIAS_NODE 0x100
typedef struct Flow_Data_t_ {
unsigned int mark : 16;
union {
Abc_Obj_t *pred;
/* unsigned int var; */
Abc_Obj_t *pInitObj;
Abc_Obj_t *pCopy;
Vec_Ptr_t *vNodes;
};
unsigned int e_dist : 16;
unsigned int r_dist : 16;
} Flow_Data_t;
// useful macros for manipulating Flow_Data structure...
#define FDATA( x ) (pManMR->pDataArray+Abc_ObjId(x))
#define FSET( x, y ) FDATA(x)->mark |= y
#define FUNSET( x, y ) FDATA(x)->mark &= ~y
#define FTEST( x, y ) (FDATA(x)->mark & y)
#define FTIMEEDGES( x ) &(pManMR->vTimeEdges[Abc_ObjId( x )])
typedef struct NodeLag_T_ {
int id;
int lag;
} NodeLag_t;
typedef struct InitConstraint_t_ {
Abc_Obj_t *pBiasNode;
Vec_Int_t vNodes;
Vec_Int_t vLags;
} InitConstraint_t;
typedef struct MinRegMan_t_ {
// problem description:
int maxDelay;
int fComputeInitState, fGuaranteeInitState, fBlockConst;
int nNodes, nLatches;
int fForwardOnly, fBackwardOnly;
int fConservTimingOnly;
int nMaxIters;
int fVerbose;
Abc_Ntk_t *pNtk;
int nPreRefine;
// problem state
int fIsForward;
int fSinkDistTerminate;
int nExactConstraints, nConservConstraints;
int fSolutionIsDc;
int constraintMask;
int iteration, subIteration;
Vec_Int_t *vLags;
// problem data
Vec_Int_t *vSinkDistHist;
Flow_Data_t *pDataArray;
Vec_Ptr_t *vTimeEdges;
Vec_Ptr_t *vExactNodes;
Vec_Ptr_t *vInitConstraints;
Abc_Ntk_t *pInitNtk;
Vec_Ptr_t *vNodes; // re-useable struct
NodeLag_t *pInitToOrig;
int sizeInitToOrig;
} MinRegMan_t ;
extern MinRegMan_t *pManMR;
#define vprintf if (pManMR->fVerbose) printf
static inline void FSETPRED(Abc_Obj_t *pObj, Abc_Obj_t *pPred) {
assert(!Abc_ObjIsLatch(pObj)); // must preserve field to maintain init state linkage
FDATA(pObj)->pred = pPred;
}
static inline Abc_Obj_t * FGETPRED(Abc_Obj_t *pObj) {
return FDATA(pObj)->pred;
}
/*=== fretMain.c ==========================================================*/
Abc_Ntk_t * Abc_FlowRetime_MinReg( Abc_Ntk_t * pNtk, int fVerbose,
int fComputeInitState, int fGuaranteeInitState, int fBlockConst,
int fForward, int fBackward, int nMaxIters,
int maxDelay, int fFastButConservative);
void print_node(Abc_Obj_t *pObj);
void Abc_ObjBetterTransferFanout( Abc_Obj_t * pFrom, Abc_Obj_t * pTo, int compl );
int Abc_FlowRetime_PushFlows( Abc_Ntk_t * pNtk, int fVerbose );
int Abc_FlowRetime_IsAcrossCut( Abc_Obj_t *pCur, Abc_Obj_t *pNext );
void Abc_FlowRetime_ClearFlows( int fClearAll );
int Abc_FlowRetime_GetLag( Abc_Obj_t *pObj );
void Abc_FlowRetime_SetLag( Abc_Obj_t *pObj, int lag );
void Abc_FlowRetime_UpdateLags( );
void Abc_ObjPrintNeighborhood( Abc_Obj_t *pObj, int depth );
Abc_Ntk_t * Abc_FlowRetime_NtkSilentRestrash( Abc_Ntk_t * pNtk, int fCleanup );
/*=== fretFlow.c ==========================================================*/
int dfsplain_e( Abc_Obj_t *pObj, Abc_Obj_t *pPred );
int dfsplain_r( Abc_Obj_t *pObj, Abc_Obj_t *pPred );
void dfsfast_preorder( Abc_Ntk_t *pNtk );
int dfsfast_e( Abc_Obj_t *pObj, Abc_Obj_t *pPred );
int dfsfast_r( Abc_Obj_t *pObj, Abc_Obj_t *pPred );
/*=== fretInit.c ==========================================================*/
void Abc_FlowRetime_PrintInitStateInfo( Abc_Ntk_t * pNtk );
void Abc_FlowRetime_InitState( Abc_Ntk_t * pNtk );
void Abc_FlowRetime_UpdateForwardInit( Abc_Ntk_t * pNtk );
void Abc_FlowRetime_UpdateBackwardInit( Abc_Ntk_t * pNtk );
void Abc_FlowRetime_SetupBackwardInit( Abc_Ntk_t * pNtk );
int Abc_FlowRetime_SolveBackwardInit( Abc_Ntk_t * pNtk );
void Abc_FlowRetime_ConstrainInit( );
void Abc_FlowRetime_AddInitBias( );
void Abc_FlowRetime_RemoveInitBias( );
/*=== fretTime.c ==========================================================*/
void Abc_FlowRetime_InitTiming( Abc_Ntk_t *pNtk );
void Abc_FlowRetime_FreeTiming( Abc_Ntk_t *pNtk );
int Abc_FlowRetime_RefineConstraints( );
void Abc_FlowRetime_ConstrainConserv( Abc_Ntk_t * pNtk );
void Abc_FlowRetime_ConstrainExact( Abc_Obj_t * pObj );
void Abc_FlowRetime_ConstrainExactAll( Abc_Ntk_t * pNtk );
ABC_NAMESPACE_HEADER_END
#endif
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