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author | Alan Mishchenko <alanmi@berkeley.edu> | 2013-08-05 10:45:06 -0700 |
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committer | Alan Mishchenko <alanmi@berkeley.edu> | 2013-08-05 10:45:06 -0700 |
commit | 1558fe6110554c7c732070ef3d6581c963d4ecb3 (patch) | |
tree | ca74ae0d02724f41b99a425ab3b9b536d8902989 /src/map/scl/sclSize.c | |
parent | 9d19598162d0ff91f408eb08cae145a97dcb746c (diff) | |
download | abc-1558fe6110554c7c732070ef3d6581c963d4ecb3.tar.gz abc-1558fe6110554c7c732070ef3d6581c963d4ecb3.tar.bz2 abc-1558fe6110554c7c732070ef3d6581c963d4ecb3.zip |
Adding code to estimate buffer trees.
Diffstat (limited to 'src/map/scl/sclSize.c')
-rw-r--r-- | src/map/scl/sclSize.c | 201 |
1 files changed, 171 insertions, 30 deletions
diff --git a/src/map/scl/sclSize.c b/src/map/scl/sclSize.c index bab095f5..2efa22ee 100644 --- a/src/map/scl/sclSize.c +++ b/src/map/scl/sclSize.c @@ -110,17 +110,17 @@ static inline void Abc_SclTimeNodePrint( SC_Man * p, Abc_Obj_t * pObj, int fRise SC_Cell * pCell = Abc_ObjIsNode(pObj) ? Abc_SclObjCell(p, pObj) : NULL; printf( "%6d : ", Abc_ObjId(pObj) ); printf( "%d ", Abc_ObjFaninNum(pObj) ); - printf( "%2d ", Abc_ObjFanoutNum(pObj) ); + printf( "%4d ", Abc_ObjFanoutNum(pObj) ); printf( "%-*s ", Length, pCell ? pCell->pName : "pi" ); printf( "A =%7.2f ", pCell ? pCell->area : 0.0 ); printf( "D%s =", fRise ? "r" : "f" ); - printf( "%5.0f ", Abc_MaxFloat(Abc_SclObjTimePs(p, pObj, 0), Abc_SclObjTimePs(p, pObj, 1)) ); - printf( "%4.0f ps ", -Abc_AbsFloat(Abc_SclObjTimePs(p, pObj, 0) - Abc_SclObjTimePs(p, pObj, 1)) ); + printf( "%5.0f", Abc_MaxFloat(Abc_SclObjTimePs(p, pObj, 0), Abc_SclObjTimePs(p, pObj, 1)) ); + printf( "%6.0f ps ", -Abc_AbsFloat(Abc_SclObjTimePs(p, pObj, 0) - Abc_SclObjTimePs(p, pObj, 1)) ); printf( "S =%5.0f ps ", Abc_SclObjSlewPs(p, pObj, fRise >= 0 ? fRise : 0 ) ); printf( "Cin =%4.0f ff ", pCell ? Abc_SclGatePinCapAve(p->pLib, pCell) : 0.0 ); printf( "Cout =%5.0f ff ", Abc_SclObjLoadFf(p, pObj, fRise >= 0 ? fRise : 0 ) ); printf( "Cmax =%5.0f ff ", pCell ? SC_CellPin(pCell, pCell->n_inputs)->max_out_cap : 0.0 ); - printf( "G =%4.1f ", pCell ? Abc_SclObjLoadAve(p, pObj) / SC_CellPinCap(pCell, 0) : 0.0 ); + printf( "G =%5.1f ", pCell ? Abc_SclObjLoadAve(p, pObj) / SC_CellPinCap(pCell, 0) : 0.0 ); printf( "SL =%5.1f ps", Abc_SclObjSlack(p, pObj) ); printf( "\n" ); } @@ -208,6 +208,13 @@ void Abc_SclTimeNode( SC_Man * p, Abc_Obj_t * pObj, int fDept ) SC_Pin * pPin; SC_Cell * pCell; int k; + SC_Pair * pLoad = Abc_SclObjLoad( p, pObj ); + float LoadRise = pLoad->rise; + float LoadFall = pLoad->fall; + float DeptRise = 0; + float DeptFall = 0; +// float Value = Abc_MaxFloat(pLoad->fall, pLoad->rise) / (p->EstLoadAve * p->EstLoadMax); + float Value = 0.5 * (pLoad->fall + pLoad->rise) / (p->EstLoadAve * p->EstLoadMax); if ( Abc_ObjIsCo(pObj) ) { if ( !fDept ) @@ -215,6 +222,22 @@ void Abc_SclTimeNode( SC_Man * p, Abc_Obj_t * pObj, int fDept ) return; } assert( Abc_ObjIsNode(pObj) ); +// if ( !(Abc_ObjFaninNum(pObj) == 1 && Abc_ObjIsPi(Abc_ObjFanin0(pObj))) && p->EstLoadMax && Value > 1 ) + if ( p->EstLoadMax && Value > 1 ) + { + pLoad->rise = p->EstLoadAve * p->EstLoadMax; + pLoad->fall = p->EstLoadAve * p->EstLoadMax; + if ( fDept ) + { + SC_Pair * pDepOut = Abc_SclObjDept( p, pObj ); + float EstDelta = p->EstLinear * log( Value ); + DeptRise = pDepOut->rise; + DeptFall = pDepOut->fall; + pDepOut->rise += EstDelta; + pDepOut->fall += EstDelta; + } + p->nEstNodes++; + } // get the library cell pCell = Abc_SclObjCell( p, pObj ); // get the output pin @@ -231,6 +254,24 @@ void Abc_SclTimeNode( SC_Man * p, Abc_Obj_t * pObj, int fDept ) else Abc_SclTimeFanin( p, pTime, pObj, Abc_ObjFanin(pObj, k) ); } + if ( p->EstLoadMax && Value > 1 ) + { + pLoad->rise = LoadRise; + pLoad->fall = LoadFall; + if ( fDept ) + { + SC_Pair * pDepOut = Abc_SclObjDept( p, pObj ); + pDepOut->rise = DeptRise; + pDepOut->fall = DeptFall; + } + else + { + SC_Pair * pArrOut = Abc_SclObjTime( p, pObj ); + float EstDelta = p->EstLinear * log( Value ); + pArrOut->rise += EstDelta; + pArrOut->fall += EstDelta; + } + } } void Abc_SclTimeCone( SC_Man * p, Vec_Int_t * vCone ) { @@ -256,6 +297,7 @@ void Abc_SclTimeNtkRecompute( SC_Man * p, float * pArea, float * pDelay, int fRe int i; Abc_SclComputeLoad( p ); Abc_SclManCleanTime( p ); + p->nEstNodes = 0; Abc_NtkForEachNode1( p->pNtk, pObj, i ) Abc_SclTimeNode( p, pObj, 0 ); Abc_NtkForEachCo( p->pNtk, pObj, i ) @@ -273,11 +315,18 @@ void Abc_SclTimeNtkRecompute( SC_Man * p, float * pArea, float * pDelay, int fRe *pDelay = D; if ( fReverse ) { + p->nEstNodes = 0; Abc_NtkForEachNodeReverse1( p->pNtk, pObj, i ) Abc_SclTimeNode( p, pObj, 1 ); Abc_NtkForEachObj( p->pNtk, pObj, i ) + { +// if ( Abc_SclObjGetSlack(p, pObj, D) < 0 ) +// printf( "%.2f ", Abc_SclObjGetSlack(p, pObj, D) ); p->pSlack[i] = Abc_MaxFloat( 0.0, Abc_SclObjGetSlack(p, pObj, D) ); + } } + if ( p->nEstNodes ) + printf( "Estimated nodes = %d.\n", p->nEstNodes ); } /**Function************************************************************* @@ -379,9 +428,14 @@ void Abc_SclManReadSlewAndLoad( SC_Man * p, Abc_Ntk_t * pNtk ) SeeAlso [] ***********************************************************************/ -SC_Man * Abc_SclManStart( SC_Lib * pLib, Abc_Ntk_t * pNtk, int fUseWireLoads, int fDept, float DUser ) +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 + } assert( p->vGates == NULL ); p->vGates = Abc_SclManFindGates( pLib, pNtk ); Abc_SclManReadSlewAndLoad( p, pNtk ); @@ -403,10 +457,10 @@ SC_Man * Abc_SclManStart( SC_Lib * pLib, Abc_Ntk_t * pNtk, int fUseWireLoads, in SeeAlso [] ***********************************************************************/ -void Abc_SclTimePerform( SC_Lib * pLib, Abc_Ntk_t * pNtk, int fUseWireLoads, int fShowAll, int fPrintPath, int fDumpStats ) +void Abc_SclTimePerform( 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 ); + p = Abc_SclManStart( pLib, pNtk, fUseWireLoads, 1, 0, nTreeCRatio ); Abc_SclTimeNtkPrint( p, fShowAll, fPrintPath ); if ( fDumpStats ) Abc_SclDumpStats( p, "stats.txt", 0 ); @@ -470,63 +524,150 @@ void Abc_SclPrintFaninPairs( SC_Man * p, Abc_Ntk_t * pNtk ) ***********************************************************************/ static inline int Abc_ObjIsBuffer( Abc_Obj_t * pObj ) { return Abc_ObjIsNode(pObj) && Abc_ObjFaninNum(pObj) == 1; } -int Abc_SclCountNonBufferFanouts( Abc_Obj_t * pObj ) +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_SclCountNonBufferFanouts( pFanout ); + Counter += Abc_SclCountNonBufferFanoutsInt( pFanout ); return Counter; } -int Abc_SclHasBufferFanout( Abc_Obj_t * pObj ) +int Abc_SclCountNonBufferFanouts( Abc_Obj_t * pObj ) { Abc_Obj_t * pFanout; - int i; + int i, Counter = 0; Abc_ObjForEachFanout( pObj, pFanout, i ) - if ( Abc_ObjIsBuffer(pFanout) ) - return 1; - return 0; + Counter += Abc_SclCountNonBufferFanoutsInt( pFanout ); + return Counter; } -void Abc_SclPrintBuffersInt( SC_Man * p, Abc_Obj_t * pObj, int nOffset ) +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_SclObjTimePs(p, pObj, 1); + 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(p, pObj), 0)->rise_cap + 0.5 * SC_CellPin(Abc_SclObjCell(p, pObj), 0)->fall_cap; + return Load; +} +float Abc_SclCountNonBufferLoad( SC_Man * p, Abc_Obj_t * pObj ) { -// SC_Cell_t * pCell = Abc_SclObjCell(p, 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; - assert( Abc_ObjIsBuffer(pObj) ); for ( i = 0; i < nOffset; i++ ) printf( " " ); - printf( "%6d: %-16s (%2d:%3d) ", Abc_ObjId(pObj), Mio_GateReadName((Mio_Gate_t *)pObj->pData), - Abc_ObjFanoutNum(pObj), Abc_SclCountNonBufferFanouts(pObj) ); + printf( "%6d: %-16s (%2d:%3d:%3d) ", + 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_SclObjCell(p, pObj)->area ); + printf( "a =%5.2f ", Abc_ObjIsPi(pObj) ? 0 : Abc_SclObjCell(p, pObj)->area ); printf( "d = (" ); - printf( "%7.2f ps; ", Abc_SclObjTimePs(p, pObj, 1) ); - printf( "%7.2f ps) ", Abc_SclObjTimePs(p, pObj, 0) ); - printf( "l =%6.2f ff ", Abc_SclObjLoadFf(p, pObj, 0 ) ); - printf( "s =%6.2f ps ", Abc_SclObjSlewPs(p, pObj, 0 ) ); - printf( "sl =%6.2f ps", Abc_SclObjSlack(p, pObj) ); + printf( "%6.0f ps; ", Abc_SclObjTimePs(p, pObj, 1) ); + printf( "%6.0f ps) ", Abc_SclObjTimePs(p, pObj, 0) ); + printf( "l =%5.0f ff ", Abc_SclObjLoadFf(p, pObj, 0 ) ); + printf( "s =%5.0f ps ", Abc_SclObjSlewPs(p, pObj, 0 ) ); + printf( "sl =%5.0f ps ", Abc_SclObjSlack(p, pObj) ); + if ( nOffset == 0 ) + { + printf( "L =%5.0f ff ", SC_LibCapFf( p->pLib, 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_SclObjTimePs(p, pObj, 1) ); + printf( "Cx =%5.0f ps", (Abc_SclCountNonBufferDelay(p, pObj)/Abc_SclCountNonBufferFanouts(pObj) - Abc_SclObjTimePs(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; - int i; + Abc_Obj_t * pObj, * pFanout; + int i, k; Abc_NtkForEachObj( pNtk, pObj, i ) - if ( Abc_ObjIsBuffer(pObj) && Abc_SclHasBufferFanout(pObj) ) - Abc_SclPrintBuffersInt( p, pObj, 0 ), printf( "\n" ); + { + 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 ); + p = Abc_SclManStart( pLib, pNtk, fUseWireLoads, 1, 0, 10000 ); Abc_SclPrintBufferTrees( p, pNtk ); // Abc_SclPrintFaninPairs( p, pNtk ); Abc_SclManFree( p ); |