mirror of https://github.com/YosysHQ/abc.git
928 lines
32 KiB
C
928 lines
32 KiB
C
/**CFile****************************************************************
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FileName [sclSize.c]
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SystemName [ABC: Logic synthesis and verification system.]
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PackageName [Standard-cell library representation.]
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Synopsis [Core timing analysis used in gate-sizing.]
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Author [Alan Mishchenko, Niklas Een]
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Affiliation [UC Berkeley]
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Date [Ver. 1.0. Started - August 24, 2012.]
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Revision [$Id: sclSize.c,v 1.0 2012/08/24 00:00:00 alanmi Exp $]
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***********************************************************************/
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#include "sclSize.h"
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#include "map/mio/mio.h"
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#include "misc/vec/vecWec.h"
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#include "base/main/main.h"
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#ifdef WIN32
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#include <windows.h>
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#endif
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ABC_NAMESPACE_IMPL_START
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////////////////////////////////////////////////////////////////////////
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/// DECLARATIONS ///
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////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////
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/// FUNCTION DEFINITIONS ///
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////////////////////////////////////////////////////////////////////////
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/**Function*************************************************************
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Synopsis [Finding most critical objects.]
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Description []
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SideEffects []
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SeeAlso []
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***********************************************************************/
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Abc_Obj_t * Abc_SclFindCriticalCo( SC_Man * p, int * pfRise )
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{
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Abc_Obj_t * pObj, * pPivot = NULL;
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float fMaxArr = 0;
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int i;
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assert( Abc_NtkPoNum(p->pNtk) > 0 );
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Abc_NtkForEachCo( p->pNtk, pObj, i )
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{
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SC_Pair * pArr = Abc_SclObjTime( p, pObj );
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if ( fMaxArr < pArr->rise ) fMaxArr = pArr->rise, *pfRise = 1, pPivot = pObj;
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if ( fMaxArr < pArr->fall ) fMaxArr = pArr->fall, *pfRise = 0, pPivot = pObj;
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}
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if ( fMaxArr == 0 )
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pPivot = Abc_NtkPo(p->pNtk, 0);
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assert( pPivot != NULL );
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return pPivot;
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}
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// assumes that slacks are not available (uses arrival times)
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Abc_Obj_t * Abc_SclFindMostCriticalFanin2( SC_Man * p, int * pfRise, Abc_Obj_t * pNode )
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{
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Abc_Obj_t * pFanin, * pPivot = NULL;
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float fMaxArr = 0;
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int i;
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Abc_ObjForEachFanin( pNode, pFanin, i )
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{
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SC_Pair * pArr = Abc_SclObjTime( p, pFanin );
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if ( fMaxArr < pArr->rise ) fMaxArr = pArr->rise, *pfRise = 1, pPivot = pFanin;
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if ( fMaxArr < pArr->fall ) fMaxArr = pArr->fall, *pfRise = 0, pPivot = pFanin;
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}
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return pPivot;
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}
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// assumes that slack are available
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Abc_Obj_t * Abc_SclFindMostCriticalFanin( SC_Man * p, int * pfRise, Abc_Obj_t * pNode )
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{
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Abc_Obj_t * pFanin, * pPivot = NULL;
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float fMinSlack = ABC_INFINITY;
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SC_Pair * pArr;
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int i;
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*pfRise = 0;
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// find min-slack node
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Abc_ObjForEachFanin( pNode, pFanin, i )
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if ( fMinSlack > Abc_SclObjGetSlack( p, pFanin, p->MaxDelay0 ) )
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{
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fMinSlack = Abc_SclObjGetSlack( p, pFanin, p->MaxDelay0 );
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pPivot = pFanin;
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}
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if ( pPivot == NULL )
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return NULL;
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// find its leading phase
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pArr = Abc_SclObjTime( p, pPivot );
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*pfRise = (pArr->rise >= pArr->fall);
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return pPivot;
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}
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/**Function*************************************************************
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Synopsis [Printing timing information for the node/network.]
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Description []
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SideEffects []
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SeeAlso []
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***********************************************************************/
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static inline void Abc_SclTimeNodePrint( SC_Man * p, Abc_Obj_t * pObj, int fRise, int Length, float maxDelay )
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{
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SC_Cell * pCell = Abc_ObjIsNode(pObj) ? Abc_SclObjCell(pObj) : NULL;
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printf( "%8d : ", Abc_ObjId(pObj) );
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printf( "%d ", Abc_ObjFaninNum(pObj) );
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printf( "%4d ", Abc_ObjFanoutNum(pObj) );
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printf( "%-*s ", Length, pCell ? pCell->pName : "pi" );
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printf( "A =%7.2f ", pCell ? pCell->area : 0.0 );
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printf( "D%s =", fRise ? "r" : "f" );
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printf( "%6.1f", Abc_SclObjTimeMax(p, pObj) );
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printf( "%7.1f ps ", -Abc_AbsFloat(Abc_SclObjTimeOne(p, pObj, 0) - Abc_SclObjTimeOne(p, pObj, 1)) );
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printf( "S =%6.1f ps ", Abc_SclObjSlewMax(p, pObj) );
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printf( "Cin =%5.1f ff ", pCell ? SC_CellPinCapAve(pCell) : 0.0 );
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printf( "Cout =%6.1f ff ", Abc_SclObjLoadMax(p, pObj) );
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printf( "Cmax =%6.1f ff ", pCell ? SC_CellPin(pCell, pCell->n_inputs)->max_out_cap : 0.0 );
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printf( "G =%5d ", pCell ? (int)(100.0 * Abc_SclObjLoadAve(p, pObj) / SC_CellPinCapAve(pCell)) : 0 );
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// printf( "SL =%6.1f ps", Abc_SclObjSlackMax(p, pObj, p->MaxDelay0) );
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printf( "\n" );
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}
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void Abc_SclTimeNtkPrint( SC_Man * p, int fShowAll, int fPrintPath )
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{
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int fReversePath = 1;
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int i, nLength = 0, fRise = 0;
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Abc_Obj_t * pObj, * pPivot = Abc_SclFindCriticalCo( p, &fRise );
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float maxDelay = Abc_SclObjTimeOne( p, pPivot, fRise );
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p->ReportDelay = maxDelay;
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// used for Floyds cycle detection algorithm
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unsigned int tortoiseIndex = 0;
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int tortoiseStep = 0;
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#ifdef WIN32
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printf( "WireLoad = \"%s\" ", p->pWLoadUsed ? p->pWLoadUsed->pName : "none" );
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SetConsoleTextAttribute( GetStdHandle(STD_OUTPUT_HANDLE), 14 ); // yellow
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printf( "Gates =%7d ", Abc_NtkNodeNum(p->pNtk) );
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SetConsoleTextAttribute( GetStdHandle(STD_OUTPUT_HANDLE), 7 ); // normal
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printf( "(%5.1f %%) ", 100.0 * Abc_SclGetBufInvCount(p->pNtk) / Abc_NtkNodeNum(p->pNtk) );
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SetConsoleTextAttribute( GetStdHandle(STD_OUTPUT_HANDLE), 10 ); // green
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printf( "Cap =%5.1f ff ", p->EstLoadAve );
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SetConsoleTextAttribute( GetStdHandle(STD_OUTPUT_HANDLE), 7 ); // normal
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printf( "(%5.1f %%) ", Abc_SclGetAverageSize(p->pNtk) );
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SetConsoleTextAttribute( GetStdHandle(STD_OUTPUT_HANDLE), 11 ); // blue
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printf( "Area =%12.2f ", Abc_SclGetTotalArea(p->pNtk) );
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SetConsoleTextAttribute( GetStdHandle(STD_OUTPUT_HANDLE), 7 ); // normal
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printf( "(%5.1f %%) ", 100.0 * Abc_SclCountMinSize(p->pLib, p->pNtk, 0) / Abc_NtkNodeNum(p->pNtk) );
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SetConsoleTextAttribute( GetStdHandle(STD_OUTPUT_HANDLE), 13 ); // magenta
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printf( "Delay =%9.2f ps ", maxDelay );
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SetConsoleTextAttribute( GetStdHandle(STD_OUTPUT_HANDLE), 7 ); // normal
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printf( "(%5.1f %%) ", 100.0 * Abc_SclCountNearCriticalNodes(p) / Abc_NtkNodeNum(p->pNtk) );
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printf( " \n" );
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#else
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Abc_Print( 1, "WireLoad = \"%s\" ", p->pWLoadUsed ? p->pWLoadUsed->pName : "none" );
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Abc_Print( 1, "%sGates =%7d%s ", "\033[1;33m", Abc_NtkNodeNum(p->pNtk), "\033[0m" ); // yellow
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Abc_Print( 1, "(%5.1f %%) ", 100.0 * Abc_SclGetBufInvCount(p->pNtk) / Abc_NtkNodeNum(p->pNtk) );
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Abc_Print( 1, "%sCap =%5.1f ff%s ", "\033[1;32m", p->EstLoadAve, "\033[0m" ); // green
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Abc_Print( 1, "(%5.1f %%) ", Abc_SclGetAverageSize(p->pNtk) );
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Abc_Print( 1, "%sArea =%12.2f%s ", "\033[1;36m", Abc_SclGetTotalArea(p->pNtk), "\033[0m" ); // blue
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Abc_Print( 1, "(%5.1f %%) ", 100.0 * Abc_SclCountMinSize(p->pLib, p->pNtk, 0) / Abc_NtkNodeNum(p->pNtk) );
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Abc_Print( 1, "%sDelay =%9.2f ps%s ", "\033[1;35m", maxDelay, "\033[0m" ); // magenta
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Abc_Print( 1, "(%5.1f %%) ", 100.0 * Abc_SclCountNearCriticalNodes(p) / Abc_NtkNodeNum(p->pNtk) );
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Abc_Print( 1, " \n" );
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#endif
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if ( fShowAll )
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{
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// printf( "Timing information for all nodes: \n" );
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// find the longest cell name
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Abc_NtkForEachNodeReverse( p->pNtk, pObj, i )
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if ( Abc_ObjFaninNum(pObj) > 0 )
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nLength = Abc_MaxInt( nLength, strlen(Abc_SclObjCell(pObj)->pName) );
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// print timing
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Abc_NtkForEachNodeReverse( p->pNtk, pObj, i )
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if ( Abc_ObjFaninNum(pObj) > 0 )
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Abc_SclTimeNodePrint( p, pObj, -1, nLength, maxDelay );
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}
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if ( fPrintPath )
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{
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Abc_Obj_t * pTemp, * pPrev = NULL;
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int iStart = -1, iEnd = -1;
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Vec_Ptr_t * vPath;
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// printf( "Critical path: \n" );
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// find the longest cell name
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pObj = Abc_ObjFanin0(pPivot);
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i = 0;
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while ( pObj && Abc_ObjIsNode(pObj) )
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{
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i++;
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nLength = Abc_MaxInt( nLength, Abc_SclObjCell(pObj) ? strlen(Abc_SclObjCell(pObj)->pName) : 2 /* strlen("pi") */ );
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pObj = Abc_SclFindMostCriticalFanin( p, &fRise, pObj );
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}
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// print timing
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if ( !fReversePath )
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{
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// print timing
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pObj = Abc_ObjFanin0(pPivot);
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while ( pObj )//&& Abc_ObjIsNode(pObj) )
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{
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printf( "Path%3d --", i-- );
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Abc_SclTimeNodePrint( p, pObj, fRise, nLength, maxDelay );
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pPrev = pObj;
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pObj = Abc_SclFindMostCriticalFanin( p, &fRise, pObj );
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}
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}
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else
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{
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// collect path nodes
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vPath = Vec_PtrAlloc( 100 );
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Vec_PtrPush( vPath, pPivot );
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pObj = Abc_ObjFanin0(pPivot);
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while ( pObj )//&& Abc_ObjIsNode(pObj) )
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{
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Vec_PtrPush( vPath, pObj );
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pPrev = pObj;
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pObj = Abc_SclFindMostCriticalFanin( p, &fRise, pObj );
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// move the tortoise at half the speed (trailing)
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tortoiseStep = (tortoiseStep + 1) % 2;
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tortoiseIndex += tortoiseStep;
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// if they see the same element, we are in a loop
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if(vPath->pArray[tortoiseIndex] == pObj) {
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break;
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}
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}
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Vec_PtrForEachEntryReverse( Abc_Obj_t *, vPath, pObj, i )
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{
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printf( "Path%3d --", Vec_PtrSize(vPath)-1-i );
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Abc_SclTimeNodePrint( p, pObj, fRise, nLength, maxDelay );
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if ( i == 1 )
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break;
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}
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Vec_PtrFree( vPath );
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}
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// print start-point and end-point
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Abc_NtkForEachPi( p->pNtk, pTemp, iStart )
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if ( pTemp == pPrev )
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break;
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Abc_NtkForEachPo( p->pNtk, pTemp, iEnd )
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if ( pTemp == pPivot )
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break;
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printf( "Start-point = pi%0*d. End-point = po%0*d.\n",
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Abc_Base10Log( Abc_NtkPiNum(p->pNtk) ), iStart,
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Abc_Base10Log( Abc_NtkPoNum(p->pNtk) ), iEnd );
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}
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}
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/**Function*************************************************************
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Synopsis [Timing computation for pin/gate/cone/network.]
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Description []
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SideEffects []
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SeeAlso []
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***********************************************************************/
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static inline void Abc_SclTimeFanin( SC_Man * p, SC_Timing * pTime, Abc_Obj_t * pObj, Abc_Obj_t * pFanin )
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{
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SC_Pair * pArrIn = Abc_SclObjTime( p, pFanin );
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SC_Pair * pSlewIn = Abc_SclObjSlew( p, pFanin );
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SC_Pair * pLoad = Abc_SclObjLoad( p, pObj );
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SC_Pair * pArrOut = Abc_SclObjTime( p, pObj ); // modified
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SC_Pair * pSlewOut = Abc_SclObjSlew( p, pObj ); // modified
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Scl_LibPinArrival( pTime, pArrIn, pSlewIn, pLoad, pArrOut, pSlewOut );
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}
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static inline void Abc_SclDeptFanin( SC_Man * p, SC_Timing * pTime, Abc_Obj_t * pObj, Abc_Obj_t * pFanin )
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{
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SC_Pair * pDepIn = Abc_SclObjDept( p, pFanin ); // modified
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SC_Pair * pSlewIn = Abc_SclObjSlew( p, pFanin );
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SC_Pair * pLoad = Abc_SclObjLoad( p, pObj );
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SC_Pair * pDepOut = Abc_SclObjDept( p, pObj );
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Scl_LibPinDeparture( pTime, pDepIn, pSlewIn, pLoad, pDepOut );
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}
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static inline void Abc_SclDeptObj( SC_Man * p, Abc_Obj_t * pObj )
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{
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SC_Timing * pTime;
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Abc_Obj_t * pFanout;
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int i;
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SC_PairClean( Abc_SclObjDept(p, pObj) );
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Abc_ObjForEachFanout( pObj, pFanout, i )
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{
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if ( Abc_ObjIsCo(pFanout) || Abc_ObjIsLatch(pFanout) )
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continue;
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pTime = Scl_CellPinTime( Abc_SclObjCell(pFanout), Abc_NodeFindFanin(pFanout, pObj) );
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Abc_SclDeptFanin( p, pTime, pFanout, pObj );
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}
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}
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static inline float Abc_SclObjLoadValue( SC_Man * p, Abc_Obj_t * pObj )
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{
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// float Value = Abc_MaxFloat(pLoad->fall, pLoad->rise) / (p->EstLoadAve * p->EstLoadMax);
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return (0.5 * Abc_SclObjLoad(p, pObj)->fall + 0.5 * Abc_SclObjLoad(p, pObj)->rise) / (p->EstLoadAve * p->EstLoadMax);
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}
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static inline void Abc_SclTimeCi( SC_Man * p, Abc_Obj_t * pObj )
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{
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if ( p->pPiDrive != NULL )
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{
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SC_Pair * pLoad = Abc_SclObjLoad( p, pObj );
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SC_Pair * pTime = Abc_SclObjTime( p, pObj );
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SC_Pair * pSlew = Abc_SclObjSlew( p, pObj );
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Scl_LibHandleInputDriver( p->pPiDrive, pLoad, pTime, pSlew );
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}
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}
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void Abc_SclTimeNode( SC_Man * p, Abc_Obj_t * pObj, int fDept )
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{
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SC_Timing * pTime;
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SC_Cell * pCell;
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int k;
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SC_Pair * pLoad = Abc_SclObjLoad( p, pObj );
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float LoadRise = pLoad->rise;
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float LoadFall = pLoad->fall;
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float DeptRise = 0;
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float DeptFall = 0;
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float Value = p->EstLoadMax ? Abc_SclObjLoadValue( p, pObj ) : 0;
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Abc_Obj_t * pFanin;
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if ( Abc_ObjIsCi(pObj) )
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{
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assert( !fDept );
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Abc_SclTimeCi( p, pObj );
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return;
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}
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if ( Abc_ObjIsCo(pObj) )
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{
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if ( !fDept )
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{
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Abc_SclObjDupFanin( p, pObj );
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Vec_FltWriteEntry( p->vTimesOut, pObj->iData, Abc_SclObjTimeMax(p, pObj) );
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Vec_QueUpdate( p->vQue, pObj->iData );
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}
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return;
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}
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assert( Abc_ObjIsNode(pObj) );
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// if ( !(Abc_ObjFaninNum(pObj) == 1 && Abc_ObjIsPi(Abc_ObjFanin0(pObj))) && p->EstLoadMax && Value > 1 )
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if ( p->EstLoadMax && Value > 1 )
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{
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pLoad->rise = p->EstLoadAve * p->EstLoadMax;
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pLoad->fall = p->EstLoadAve * p->EstLoadMax;
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if ( fDept )
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{
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SC_Pair * pDepOut = Abc_SclObjDept( p, pObj );
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float EstDelta = p->EstLinear * log( Value );
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DeptRise = pDepOut->rise;
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DeptFall = pDepOut->fall;
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pDepOut->rise += EstDelta;
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pDepOut->fall += EstDelta;
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}
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p->nEstNodes++;
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}
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// get the library cell
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pCell = Abc_SclObjCell( pObj );
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// compute for each fanin
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Abc_ObjForEachFanin( pObj, pFanin, k )
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{
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pTime = Scl_CellPinTime( pCell, k );
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if ( fDept )
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Abc_SclDeptFanin( p, pTime, pObj, pFanin );
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else
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Abc_SclTimeFanin( p, pTime, pObj, pFanin );
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}
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if ( p->EstLoadMax && Value > 1 )
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{
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pLoad->rise = LoadRise;
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pLoad->fall = LoadFall;
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if ( fDept )
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{
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SC_Pair * pDepOut = Abc_SclObjDept( p, pObj );
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pDepOut->rise = DeptRise;
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pDepOut->fall = DeptFall;
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}
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else
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{
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SC_Pair * pArrOut = Abc_SclObjTime( p, pObj );
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float EstDelta = p->EstLinear * log( Value );
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pArrOut->rise += EstDelta;
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pArrOut->fall += EstDelta;
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}
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}
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}
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void Abc_SclTimeCone( SC_Man * p, Vec_Int_t * vCone )
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{
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int fVerbose = 0;
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Abc_Obj_t * pObj;
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int i;
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Abc_SclConeClean( p, vCone );
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Abc_NtkForEachObjVec( vCone, p->pNtk, pObj, i )
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{
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if ( fVerbose && Abc_ObjIsNode(pObj) )
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printf( " Updating node %d with gate %s\n", Abc_ObjId(pObj), Abc_SclObjCell(pObj)->pName );
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if ( fVerbose && Abc_ObjIsNode(pObj) )
|
|
printf( " before (%6.1f ps %6.1f ps) ", Abc_SclObjTimeOne(p, pObj, 1), Abc_SclObjTimeOne(p, pObj, 0) );
|
|
Abc_SclTimeNode( p, pObj, 0 );
|
|
if ( fVerbose && Abc_ObjIsNode(pObj) )
|
|
printf( "after (%6.1f ps %6.1f ps)\n", Abc_SclObjTimeOne(p, pObj, 1), Abc_SclObjTimeOne(p, pObj, 0) );
|
|
}
|
|
}
|
|
void Abc_SclTimeNtkRecompute( SC_Man * p, float * pArea, float * pDelay, int fReverse, float DUser )
|
|
{
|
|
Abc_Obj_t * pObj;
|
|
float D;
|
|
int i;
|
|
Abc_SclComputeLoad( p );
|
|
Abc_SclManCleanTime( p );
|
|
p->nEstNodes = 0;
|
|
Abc_NtkForEachCi( p->pNtk, pObj, i )
|
|
Abc_SclTimeNode( p, pObj, 0 );
|
|
Abc_NtkForEachNode1( p->pNtk, pObj, i )
|
|
Abc_SclTimeNode( p, pObj, 0 );
|
|
Abc_NtkForEachCo( p->pNtk, pObj, i )
|
|
Abc_SclTimeNode( p, pObj, 0 );
|
|
D = Abc_SclReadMaxDelay( p );
|
|
if ( fReverse && DUser > 0 && D < DUser )
|
|
D = DUser;
|
|
if ( pArea )
|
|
*pArea = Abc_SclGetTotalArea(p->pNtk);
|
|
if ( pDelay )
|
|
*pDelay = D;
|
|
if ( fReverse )
|
|
{
|
|
p->nEstNodes = 0;
|
|
Abc_NtkForEachNodeReverse1( p->pNtk, pObj, i )
|
|
Abc_SclTimeNode( p, pObj, 1 );
|
|
}
|
|
}
|
|
|
|
/**Function*************************************************************
|
|
|
|
Synopsis [Incremental timing update.]
|
|
|
|
Description []
|
|
|
|
SideEffects []
|
|
|
|
SeeAlso []
|
|
|
|
***********************************************************************/
|
|
static inline void Abc_SclTimeIncUpdateClean( SC_Man * p )
|
|
{
|
|
Vec_Int_t * vLevel;
|
|
Abc_Obj_t * pObj;
|
|
int i, k;
|
|
Vec_WecForEachLevel( p->vLevels, vLevel, i )
|
|
{
|
|
Abc_NtkForEachObjVec( vLevel, p->pNtk, pObj, k )
|
|
{
|
|
assert( pObj->fMarkC == 1 );
|
|
pObj->fMarkC = 0;
|
|
}
|
|
Vec_IntClear( vLevel );
|
|
}
|
|
}
|
|
static inline void Abc_SclTimeIncAddNode( SC_Man * p, Abc_Obj_t * pObj )
|
|
{
|
|
assert( !Abc_ObjIsLatch(pObj) );
|
|
assert( pObj->fMarkC == 0 );
|
|
pObj->fMarkC = 1;
|
|
Vec_IntPush( Vec_WecEntry(p->vLevels, Abc_ObjLevel(pObj)), Abc_ObjId(pObj) );
|
|
p->nIncUpdates++;
|
|
}
|
|
static inline void Abc_SclTimeIncAddFanins( SC_Man * p, Abc_Obj_t * pObj )
|
|
{
|
|
Abc_Obj_t * pFanin;
|
|
int i;
|
|
Abc_ObjForEachFanin( pObj, pFanin, i )
|
|
// if ( !pFanin->fMarkC && Abc_ObjIsNode(pFanin) )
|
|
if ( !pFanin->fMarkC && !Abc_ObjIsLatch(pFanin) )
|
|
Abc_SclTimeIncAddNode( p, pFanin );
|
|
}
|
|
static inline void Abc_SclTimeIncAddFanouts( SC_Man * p, Abc_Obj_t * pObj )
|
|
{
|
|
Abc_Obj_t * pFanout;
|
|
int i;
|
|
Abc_ObjForEachFanout( pObj, pFanout, i )
|
|
if ( !pFanout->fMarkC && !Abc_ObjIsLatch(pFanout) )
|
|
Abc_SclTimeIncAddNode( p, pFanout );
|
|
}
|
|
static inline void Abc_SclTimeIncUpdateArrival( SC_Man * p )
|
|
{
|
|
Vec_Int_t * vLevel;
|
|
SC_Pair ArrOut, SlewOut;
|
|
SC_Pair * pArrOut, *pSlewOut;
|
|
Abc_Obj_t * pObj;
|
|
float E = (float)0.1;
|
|
int i, k;
|
|
Vec_WecForEachLevel( p->vLevels, vLevel, i )
|
|
{
|
|
Abc_NtkForEachObjVec( vLevel, p->pNtk, pObj, k )
|
|
{
|
|
if ( Abc_ObjIsCo(pObj) )
|
|
{
|
|
Abc_SclObjDupFanin( p, pObj );
|
|
Vec_FltWriteEntry( p->vTimesOut, pObj->iData, Abc_SclObjTimeMax(p, pObj) );
|
|
Vec_QueUpdate( p->vQue, pObj->iData );
|
|
continue;
|
|
}
|
|
pArrOut = Abc_SclObjTime( p, pObj );
|
|
pSlewOut = Abc_SclObjSlew( p, pObj );
|
|
SC_PairMove( &ArrOut, pArrOut );
|
|
SC_PairMove( &SlewOut, pSlewOut );
|
|
Abc_SclTimeNode( p, pObj, 0 );
|
|
// if ( !SC_PairEqual(&ArrOut, pArrOut) || !SC_PairEqual(&SlewOut, pSlewOut) )
|
|
if ( !SC_PairEqualE(&ArrOut, pArrOut, E) || !SC_PairEqualE(&SlewOut, pSlewOut, E) )
|
|
Abc_SclTimeIncAddFanouts( p, pObj );
|
|
}
|
|
}
|
|
p->MaxDelay = Abc_SclReadMaxDelay( p );
|
|
}
|
|
static inline void Abc_SclTimeIncUpdateDeparture( SC_Man * p )
|
|
{
|
|
Vec_Int_t * vLevel;
|
|
SC_Pair DepOut, * pDepOut;
|
|
Abc_Obj_t * pObj;
|
|
float E = (float)0.1;
|
|
int i, k;
|
|
Vec_WecForEachLevelReverse( p->vLevels, vLevel, i )
|
|
{
|
|
Abc_NtkForEachObjVec( vLevel, p->pNtk, pObj, k )
|
|
{
|
|
pDepOut = Abc_SclObjDept( p, pObj );
|
|
SC_PairMove( &DepOut, pDepOut );
|
|
Abc_SclDeptObj( p, pObj );
|
|
// if ( !SC_PairEqual(&DepOut, pDepOut) )
|
|
if ( !SC_PairEqualE(&DepOut, pDepOut, E) )
|
|
Abc_SclTimeIncAddFanins( p, pObj );
|
|
}
|
|
}
|
|
p->MaxDelay = Abc_SclReadMaxDelay( p );
|
|
}
|
|
void Abc_SclTimeIncCheckLevel( Abc_Ntk_t * pNtk )
|
|
{
|
|
Abc_Obj_t * pObj;
|
|
int i;
|
|
Abc_NtkForEachObj( pNtk, pObj, i )
|
|
if ( (int)pObj->Level != Abc_ObjLevelNew(pObj) )
|
|
printf( "Level of node %d is out of date!\n", i );
|
|
}
|
|
int Abc_SclTimeIncUpdate( SC_Man * p )
|
|
{
|
|
Abc_Obj_t * pObj;
|
|
int i, RetValue;
|
|
if ( Vec_IntSize(p->vChanged) == 0 )
|
|
return 0;
|
|
// Abc_SclTimeIncCheckLevel( p->pNtk );
|
|
Abc_NtkForEachObjVec( p->vChanged, p->pNtk, pObj, i )
|
|
{
|
|
Abc_SclTimeIncAddFanins( p, pObj );
|
|
if ( pObj->fMarkC )
|
|
continue;
|
|
Abc_SclTimeIncAddNode( p, pObj );
|
|
}
|
|
Vec_IntClear( p->vChanged );
|
|
Abc_SclTimeIncUpdateArrival( p );
|
|
Abc_SclTimeIncUpdateDeparture( p );
|
|
Abc_SclTimeIncUpdateClean( p );
|
|
RetValue = p->nIncUpdates;
|
|
p->nIncUpdates = 0;
|
|
return RetValue;
|
|
}
|
|
void Abc_SclTimeIncInsert( SC_Man * p, Abc_Obj_t * pObj )
|
|
{
|
|
Vec_IntPush( p->vChanged, Abc_ObjId(pObj) );
|
|
}
|
|
void Abc_SclTimeIncUpdateLevel_rec( Abc_Obj_t * pObj )
|
|
{
|
|
Abc_Obj_t * pFanout;
|
|
int i, LevelNew = Abc_ObjLevelNew(pObj);
|
|
if ( LevelNew == (int)pObj->Level && Abc_ObjIsNode(pObj) && Abc_ObjFaninNum(pObj) > 0 )
|
|
return;
|
|
pObj->Level = LevelNew;
|
|
Abc_ObjForEachFanout( pObj, pFanout, i )
|
|
Abc_SclTimeIncUpdateLevel_rec( pFanout );
|
|
}
|
|
void Abc_SclTimeIncUpdateLevel( Abc_Obj_t * pObj )
|
|
{
|
|
Abc_SclTimeIncUpdateLevel_rec( pObj );
|
|
}
|
|
|
|
|
|
|
|
/**Function*************************************************************
|
|
|
|
Synopsis [Read input slew and output load.]
|
|
|
|
Description []
|
|
|
|
SideEffects []
|
|
|
|
SeeAlso []
|
|
|
|
***********************************************************************/
|
|
void Abc_SclManReadSlewAndLoad( SC_Man * p, Abc_Ntk_t * pNtk )
|
|
{
|
|
if ( Abc_FrameReadMaxLoad() )
|
|
{
|
|
Abc_Obj_t * pObj; int i;
|
|
float MaxLoad = Abc_FrameReadMaxLoad();
|
|
// printf( "Default output load is specified (%.2f ff).\n", MaxLoad );
|
|
Abc_NtkForEachPo( pNtk, pObj, i )
|
|
{
|
|
SC_Pair * pLoad = Abc_SclObjLoad( p, pObj );
|
|
pLoad->rise = pLoad->fall = MaxLoad;
|
|
}
|
|
}
|
|
if ( Abc_FrameReadDrivingCell() )
|
|
{
|
|
int iCell = Abc_SclCellFind( p->pLib, Abc_FrameReadDrivingCell() );
|
|
if ( iCell == -1 )
|
|
printf( "Cannot find the default PI driving cell (%s) in the library.\n", Abc_FrameReadDrivingCell() );
|
|
else
|
|
{
|
|
// printf( "Default PI driving cell is specified (%s).\n", Abc_FrameReadDrivingCell() );
|
|
p->pPiDrive = SC_LibCell( p->pLib, iCell );
|
|
assert( p->pPiDrive != NULL );
|
|
assert( p->pPiDrive->n_inputs == 1 );
|
|
}
|
|
}
|
|
}
|
|
|
|
/**Function*************************************************************
|
|
|
|
Synopsis [Prepare timing manager.]
|
|
|
|
Description []
|
|
|
|
SideEffects []
|
|
|
|
SeeAlso []
|
|
|
|
***********************************************************************/
|
|
SC_Man * Abc_SclManStart( SC_Lib * pLib, Abc_Ntk_t * pNtk, int fUseWireLoads, int fDept, float DUser, int nTreeCRatio )
|
|
{
|
|
SC_Man * p = Abc_SclManAlloc( pLib, pNtk );
|
|
if ( nTreeCRatio )
|
|
{
|
|
p->EstLoadMax = 0.01 * nTreeCRatio; // max ratio of Cout/Cave when the estimation is used
|
|
p->EstLinear = 100; // linear coefficient
|
|
}
|
|
Abc_SclMioGates2SclGates( pLib, pNtk );
|
|
Abc_SclManReadSlewAndLoad( p, pNtk );
|
|
if ( fUseWireLoads )
|
|
{
|
|
if ( pNtk->pWLoadUsed == NULL )
|
|
{
|
|
p->pWLoadUsed = Abc_SclFindWireLoadModel( pLib, Abc_SclGetTotalArea(p->pNtk) );
|
|
if ( p->pWLoadUsed )
|
|
pNtk->pWLoadUsed = Abc_UtilStrsav( p->pWLoadUsed->pName );
|
|
}
|
|
else
|
|
p->pWLoadUsed = Abc_SclFetchWireLoadModel( pLib, pNtk->pWLoadUsed );
|
|
}
|
|
Abc_SclTimeNtkRecompute( p, &p->SumArea0, &p->MaxDelay0, fDept, DUser );
|
|
p->SumArea = p->SumArea0;
|
|
p->MaxDelay = p->MaxDelay0;
|
|
return p;
|
|
}
|
|
|
|
/**Function*************************************************************
|
|
|
|
Synopsis [Printing out timing information for the network.]
|
|
|
|
Description []
|
|
|
|
SideEffects []
|
|
|
|
SeeAlso []
|
|
|
|
***********************************************************************/
|
|
void Abc_SclTimePerformInt( SC_Lib * pLib, Abc_Ntk_t * pNtk, int nTreeCRatio, int fUseWireLoads, int fShowAll, int fPrintPath, int fDumpStats )
|
|
{
|
|
SC_Man * p;
|
|
p = Abc_SclManStart( pLib, pNtk, fUseWireLoads, 1, 0, nTreeCRatio );
|
|
Abc_SclTimeNtkPrint( p, fShowAll, fPrintPath );
|
|
if ( fDumpStats )
|
|
Abc_SclDumpStats( p, "stats.txt", 0 );
|
|
Abc_SclManFree( p );
|
|
}
|
|
|
|
/**Function*************************************************************
|
|
|
|
Synopsis []
|
|
|
|
Description []
|
|
|
|
SideEffects []
|
|
|
|
SeeAlso []
|
|
|
|
***********************************************************************/
|
|
void Abc_SclTimePerform( SC_Lib * pLib, Abc_Ntk_t * pNtk, int nTreeCRatio, int fUseWireLoads, int fShowAll, int fPrintPath, int fDumpStats )
|
|
{
|
|
Abc_Ntk_t * pNtkNew = pNtk;
|
|
if ( pNtk->nBarBufs2 > 0 )
|
|
pNtkNew = Abc_NtkDupDfsNoBarBufs( pNtk );
|
|
Abc_SclTimePerformInt( pLib, pNtkNew, nTreeCRatio, fUseWireLoads, fShowAll, fPrintPath, fDumpStats );
|
|
if ( pNtk->nBarBufs2 > 0 )
|
|
Abc_NtkDelete( pNtkNew );
|
|
}
|
|
|
|
|
|
|
|
/**Function*************************************************************
|
|
|
|
Synopsis [Printing out fanin information.]
|
|
|
|
Description []
|
|
|
|
SideEffects []
|
|
|
|
SeeAlso []
|
|
|
|
***********************************************************************/
|
|
int Abc_SclCheckCommonInputs( Abc_Obj_t * pObj, Abc_Obj_t * pFanin )
|
|
{
|
|
Abc_Obj_t * pTemp;
|
|
int i;
|
|
Abc_ObjForEachFanin( pObj, pTemp, i )
|
|
if ( Abc_NodeFindFanin( pFanin, pTemp ) >= 0 )
|
|
{
|
|
printf( "Node %d and its fanin %d have common fanin %d.\n", Abc_ObjId(pObj), Abc_ObjId(pFanin), Abc_ObjId(pTemp) );
|
|
|
|
printf( "%-16s : ", Mio_GateReadName((Mio_Gate_t *)pObj->pData) );
|
|
Abc_ObjPrint( stdout, pObj );
|
|
|
|
printf( "%-16s : ", Mio_GateReadName((Mio_Gate_t *)pFanin->pData) );
|
|
Abc_ObjPrint( stdout, pFanin );
|
|
|
|
if ( pTemp->pData )
|
|
printf( "%-16s : ", Mio_GateReadName((Mio_Gate_t *)pTemp->pData) );
|
|
Abc_ObjPrint( stdout, pTemp );
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
void Abc_SclPrintFaninPairs( SC_Man * p, Abc_Ntk_t * pNtk )
|
|
{
|
|
Abc_Obj_t * pObj, * pFanin;
|
|
int i, k;
|
|
Abc_NtkForEachNode( pNtk, pObj, i )
|
|
Abc_ObjForEachFanin( pObj, pFanin, k )
|
|
if ( Abc_ObjIsNode(pFanin) && Abc_ObjFanoutNum(pFanin) == 1 )
|
|
Abc_SclCheckCommonInputs( pObj, pFanin );
|
|
}
|
|
|
|
/**Function*************************************************************
|
|
|
|
Synopsis [Printing out buffer information.]
|
|
|
|
Description []
|
|
|
|
SideEffects []
|
|
|
|
SeeAlso []
|
|
|
|
***********************************************************************/
|
|
static inline int Abc_ObjIsBuffer( Abc_Obj_t * pObj ) { return Abc_ObjIsNode(pObj) && Abc_ObjFaninNum(pObj) == 1; }
|
|
int Abc_SclHasBufferFanout( Abc_Obj_t * pObj )
|
|
{
|
|
Abc_Obj_t * pFanout;
|
|
int i;
|
|
Abc_ObjForEachFanout( pObj, pFanout, i )
|
|
if ( Abc_ObjIsBuffer(pFanout) )
|
|
return 1;
|
|
return 0;
|
|
}
|
|
int Abc_SclCountBufferFanoutsInt( Abc_Obj_t * pObj )
|
|
{
|
|
Abc_Obj_t * pFanout;
|
|
int i, Counter = 0;
|
|
Abc_ObjForEachFanout( pObj, pFanout, i )
|
|
if ( Abc_ObjIsBuffer(pFanout) )
|
|
Counter += Abc_SclCountBufferFanoutsInt( pFanout );
|
|
return Counter + Abc_ObjIsBuffer(pObj);
|
|
}
|
|
int Abc_SclCountBufferFanouts( Abc_Obj_t * pObj )
|
|
{
|
|
return Abc_SclCountBufferFanoutsInt(pObj) - Abc_ObjIsBuffer(pObj);
|
|
}
|
|
int Abc_SclCountNonBufferFanoutsInt( Abc_Obj_t * pObj )
|
|
{
|
|
Abc_Obj_t * pFanout;
|
|
int i, Counter = 0;
|
|
if ( !Abc_ObjIsBuffer(pObj) )
|
|
return 1;
|
|
Abc_ObjForEachFanout( pObj, pFanout, i )
|
|
Counter += Abc_SclCountNonBufferFanoutsInt( pFanout );
|
|
return Counter;
|
|
}
|
|
int Abc_SclCountNonBufferFanouts( Abc_Obj_t * pObj )
|
|
{
|
|
Abc_Obj_t * pFanout;
|
|
int i, Counter = 0;
|
|
Abc_ObjForEachFanout( pObj, pFanout, i )
|
|
Counter += Abc_SclCountNonBufferFanoutsInt( pFanout );
|
|
return Counter;
|
|
}
|
|
float Abc_SclCountNonBufferDelayInt( SC_Man * p, Abc_Obj_t * pObj )
|
|
{
|
|
Abc_Obj_t * pFanout;
|
|
float Delay = 0;
|
|
int i;
|
|
if ( !Abc_ObjIsBuffer(pObj) )
|
|
return Abc_SclObjTimeMax(p, pObj);
|
|
Abc_ObjForEachFanout( pObj, pFanout, i )
|
|
Delay += Abc_SclCountNonBufferDelayInt( p, pFanout );
|
|
return Delay;
|
|
}
|
|
float Abc_SclCountNonBufferDelay( SC_Man * p, Abc_Obj_t * pObj )
|
|
{
|
|
Abc_Obj_t * pFanout;
|
|
float Delay = 0;
|
|
int i;
|
|
Abc_ObjForEachFanout( pObj, pFanout, i )
|
|
Delay += Abc_SclCountNonBufferDelayInt( p, pFanout );
|
|
return Delay;
|
|
}
|
|
float Abc_SclCountNonBufferLoadInt( SC_Man * p, Abc_Obj_t * pObj )
|
|
{
|
|
Abc_Obj_t * pFanout;
|
|
float Load = 0;
|
|
int i;
|
|
if ( !Abc_ObjIsBuffer(pObj) )
|
|
return 0;
|
|
Abc_ObjForEachFanout( pObj, pFanout, i )
|
|
Load += Abc_SclCountNonBufferLoadInt( p, pFanout );
|
|
Load += 0.5 * Abc_SclObjLoad(p, pObj)->rise + 0.5 * Abc_SclObjLoad(p, pObj)->fall;
|
|
Load -= 0.5 * SC_CellPin(Abc_SclObjCell(pObj), 0)->rise_cap + 0.5 * SC_CellPin(Abc_SclObjCell(pObj), 0)->fall_cap;
|
|
return Load;
|
|
}
|
|
float Abc_SclCountNonBufferLoad( SC_Man * p, Abc_Obj_t * pObj )
|
|
{
|
|
Abc_Obj_t * pFanout;
|
|
float Load = 0;
|
|
int i;
|
|
Abc_ObjForEachFanout( pObj, pFanout, i )
|
|
Load += Abc_SclCountNonBufferLoadInt( p, pFanout );
|
|
Load += 0.5 * Abc_SclObjLoad(p, pObj)->rise + 0.5 * Abc_SclObjLoad(p, pObj)->fall;
|
|
return Load;
|
|
}
|
|
void Abc_SclPrintBuffersOne( SC_Man * p, Abc_Obj_t * pObj, int nOffset )
|
|
{
|
|
int i;
|
|
for ( i = 0; i < nOffset; i++ )
|
|
printf( " " );
|
|
printf( "%6d: %-16s (%2d:%3d:%3d) ",
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|
Abc_ObjId(pObj),
|
|
Abc_ObjIsPi(pObj) ? "pi" : Mio_GateReadName((Mio_Gate_t *)pObj->pData),
|
|
Abc_ObjFanoutNum(pObj),
|
|
Abc_SclCountBufferFanouts(pObj),
|
|
Abc_SclCountNonBufferFanouts(pObj) );
|
|
for ( ; i < 4; i++ )
|
|
printf( " " );
|
|
printf( "a =%5.2f ", Abc_ObjIsPi(pObj) ? 0 : Abc_SclObjCell(pObj)->area );
|
|
printf( "d = (" );
|
|
printf( "%6.0f ps; ", Abc_SclObjTimeOne(p, pObj, 1) );
|
|
printf( "%6.0f ps) ", Abc_SclObjTimeOne(p, pObj, 0) );
|
|
printf( "l =%5.0f ff ", Abc_SclObjLoadMax(p, pObj) );
|
|
printf( "s =%5.0f ps ", Abc_SclObjSlewMax(p, pObj) );
|
|
printf( "sl =%5.0f ps ", Abc_SclObjSlackMax(p, pObj, p->MaxDelay0) );
|
|
if ( nOffset == 0 )
|
|
{
|
|
printf( "L =%5.0f ff ", Abc_SclCountNonBufferLoad(p, pObj) );
|
|
printf( "Lx =%5.0f ff ", 100.0*Abc_SclCountNonBufferLoad(p, pObj)/p->EstLoadAve );
|
|
printf( "Dx =%5.0f ps ", Abc_SclCountNonBufferDelay(p, pObj)/Abc_SclCountNonBufferFanouts(pObj) - Abc_SclObjTimeOne(p, pObj, 1) );
|
|
printf( "Cx =%5.0f ps", (Abc_SclCountNonBufferDelay(p, pObj)/Abc_SclCountNonBufferFanouts(pObj) - Abc_SclObjTimeOne(p, pObj, 1))/log(Abc_SclCountNonBufferLoad(p, pObj)/p->EstLoadAve) );
|
|
}
|
|
printf( "\n" );
|
|
}
|
|
void Abc_SclPrintBuffersInt( SC_Man * p, Abc_Obj_t * pObj, int nOffset )
|
|
{
|
|
Abc_Obj_t * pFanout;
|
|
int i;
|
|
Abc_SclPrintBuffersOne( p, pObj, nOffset );
|
|
assert( Abc_ObjIsBuffer(pObj) );
|
|
Abc_ObjForEachFanout( pObj, pFanout, i )
|
|
if ( Abc_ObjIsBuffer(pFanout) )
|
|
Abc_SclPrintBuffersInt( p, pFanout, nOffset + 1 );
|
|
}
|
|
void Abc_SclPrintBufferTrees( SC_Man * p, Abc_Ntk_t * pNtk )
|
|
{
|
|
Abc_Obj_t * pObj, * pFanout;
|
|
int i, k;
|
|
Abc_NtkForEachObj( pNtk, pObj, i )
|
|
{
|
|
if ( !Abc_ObjIsBuffer(pObj) && Abc_SclCountBufferFanouts(pObj) > 3 )
|
|
{
|
|
Abc_SclPrintBuffersOne( p, pObj, 0 );
|
|
Abc_ObjForEachFanout( pObj, pFanout, k )
|
|
if ( Abc_ObjIsBuffer(pFanout) )
|
|
Abc_SclPrintBuffersInt( p, pFanout, 1 );
|
|
printf( "\n" );
|
|
}
|
|
}
|
|
}
|
|
void Abc_SclPrintBuffers( SC_Lib * pLib, Abc_Ntk_t * pNtk, int fVerbose )
|
|
{
|
|
int fUseWireLoads = 0;
|
|
SC_Man * p;
|
|
assert( Abc_NtkIsMappedLogic(pNtk) );
|
|
p = Abc_SclManStart( pLib, pNtk, fUseWireLoads, 1, 0, 10000 );
|
|
Abc_SclPrintBufferTrees( p, pNtk );
|
|
// Abc_SclPrintFaninPairs( p, pNtk );
|
|
Abc_SclManFree( p );
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
/// END OF FILE ///
|
|
////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
ABC_NAMESPACE_IMPL_END
|
|
|
|
|