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Commit 1558fe61 by Alan Mishchenko
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Adding code to estimate buffer trees.

parent 9d195981
Showing with 78 additions and 13 deletions
src/map/scl/scl.c
......@@ -422,12 +422,24 @@ int Scl_CommandStime( Abc_Frame_t * pAbc, int argc, char **argv )
int fUseWireLoads = 1;
int fPrintPath = 0;
int fDumpStats = 0;
int nTreeCRatio = 0;
Extra_UtilGetoptReset();
while ( ( c = Extra_UtilGetopt( argc, argv, "capdh" ) ) != EOF )
while ( ( c = Extra_UtilGetopt( argc, argv, "Xcapdh" ) ) != EOF )
{
switch ( c )
{
case 'X':
if ( globalUtilOptind >= argc )
{
Abc_Print( -1, "Command line switch \"-X\" should be followed by a positive integer.\n" );
goto usage;
}
nTreeCRatio = atoi(argv[globalUtilOptind]);
globalUtilOptind++;
if ( nTreeCRatio < 0 )
goto usage;
break;
case 'c':
fUseWireLoads ^= 1;
break;
......@@ -468,12 +480,13 @@ int Scl_CommandStime( Abc_Frame_t * pAbc, int argc, char **argv )
return 1;
}
Abc_SclTimePerform( (SC_Lib *)pAbc->pLibScl, Abc_FrameReadNtk(pAbc), fUseWireLoads, fShowAll, fPrintPath, fDumpStats );
Abc_SclTimePerform( (SC_Lib *)pAbc->pLibScl, Abc_FrameReadNtk(pAbc), nTreeCRatio, fUseWireLoads, fShowAll, fPrintPath, fDumpStats );
return 0;
usage:
fprintf( pAbc->Err, "usage: stime [-capdh]\n" );
fprintf( pAbc->Err, "usage: stime [-X num] [-capdth]\n" );
fprintf( pAbc->Err, "\t performs STA using Liberty library\n" );
fprintf( pAbc->Err, "\t-X : min Cout/Cave ratio for tree estimations [default = %d]\n", nTreeCRatio );
fprintf( pAbc->Err, "\t-c : toggle using wire-loads if specified [default = %s]\n", fUseWireLoads? "yes": "no" );
fprintf( pAbc->Err, "\t-a : display timing information for all nodes [default = %s]\n", fShowAll? "yes": "no" );
fprintf( pAbc->Err, "\t-p : display timing information for critical path [default = %s]\n", fPrintPath? "yes": "no" );
......@@ -856,13 +869,14 @@ int Scl_CommandUpsize( Abc_Frame_t * pAbc, int argc, char **argv )
pPars->DelayUser = 0;
pPars->DelayGap = 0;
pPars->TimeOut = 0;
pPars->BuffTreeEst = 0;
pPars->fUseDept = 1;
pPars->fUseWireLoads = 1;
pPars->fDumpStats = 0;
pPars->fVerbose = 0;
pPars->fVeryVerbose = 0;
Extra_UtilGetoptReset();
while ( ( c = Extra_UtilGetopt( argc, argv, "IJWRNDGTcsdvwh" ) ) != EOF )
while ( ( c = Extra_UtilGetopt( argc, argv, "IJWRNDGTXcsdvwh" ) ) != EOF )
{
switch ( c )
{
......@@ -952,6 +966,17 @@ int Scl_CommandUpsize( Abc_Frame_t * pAbc, int argc, char **argv )
if ( pPars->TimeOut < 0 )
goto usage;
break;
case 'X':
if ( globalUtilOptind >= argc )
{
Abc_Print( -1, "Command line switch \"-X\" should be followed by a positive integer.\n" );
goto usage;
}
pPars->BuffTreeEst = atoi(argv[globalUtilOptind]);
globalUtilOptind++;
if ( pPars->BuffTreeEst < 0 )
goto usage;
break;
case 'c':
pPars->fUseWireLoads ^= 1;
break;
......@@ -999,7 +1024,7 @@ int Scl_CommandUpsize( Abc_Frame_t * pAbc, int argc, char **argv )
return 0;
usage:
fprintf( pAbc->Err, "usage: upsize [-IJWRNDGT num] [-csdvwh]\n" );
fprintf( pAbc->Err, "usage: upsize [-IJWRNDGTX num] [-csdvwh]\n" );
fprintf( pAbc->Err, "\t selectively increases gate sizes on the critical path\n" );
fprintf( pAbc->Err, "\t-I <num> : the number of upsizing iterations to perform [default = %d]\n", pPars->nIters );
fprintf( pAbc->Err, "\t-J <num> : the number of iterations without improvement to stop [default = %d]\n", pPars->nIterNoChange );
......@@ -1009,6 +1034,7 @@ usage:
fprintf( pAbc->Err, "\t-D <num> : delay target set by the user, in picoseconds [default = %d]\n", pPars->DelayUser );
fprintf( pAbc->Err, "\t-G <num> : delay gap during updating, in picoseconds [default = %d]\n", pPars->DelayGap );
fprintf( pAbc->Err, "\t-T <num> : approximate timeout in seconds [default = %d]\n", pPars->TimeOut );
fprintf( pAbc->Err, "\t-X <num> : ratio for buffer tree estimation [default = %d]\n", pPars->BuffTreeEst );
fprintf( pAbc->Err, "\t-c : toggle using wire-loads if specified [default = %s]\n", pPars->fUseWireLoads? "yes": "no" );
fprintf( pAbc->Err, "\t-s : toggle using slack based on departure times [default = %s]\n", pPars->fUseDept? "yes": "no" );
fprintf( pAbc->Err, "\t-d : toggle dumping statistics into a file [default = %s]\n", pPars->fDumpStats? "yes": "no" );
......@@ -1041,13 +1067,14 @@ int Scl_CommandDnsize( Abc_Frame_t * pAbc, int argc, char **argv )
pPars->DelayUser = 0;
pPars->DelayGap = 1000;
pPars->TimeOut = 0;
pPars->BuffTreeEst = 0;
pPars->fUseDept = 1;
pPars->fUseWireLoads = 1;
pPars->fDumpStats = 0;
pPars->fVerbose = 0;
pPars->fVeryVerbose = 0;
Extra_UtilGetoptReset();
while ( ( c = Extra_UtilGetopt( argc, argv, "IJNDGTcsdvwh" ) ) != EOF )
while ( ( c = Extra_UtilGetopt( argc, argv, "IJNDGTXcsdvwh" ) ) != EOF )
{
switch ( c )
{
......@@ -1115,6 +1142,17 @@ int Scl_CommandDnsize( Abc_Frame_t * pAbc, int argc, char **argv )
if ( pPars->TimeOut < 0 )
goto usage;
break;
case 'X':
if ( globalUtilOptind >= argc )
{
Abc_Print( -1, "Command line switch \"-X\" should be followed by a positive integer.\n" );
goto usage;
}
pPars->BuffTreeEst = atoi(argv[globalUtilOptind]);
globalUtilOptind++;
if ( pPars->BuffTreeEst < 0 )
goto usage;
break;
case 'c':
pPars->fUseWireLoads ^= 1;
break;
......@@ -1162,7 +1200,7 @@ int Scl_CommandDnsize( Abc_Frame_t * pAbc, int argc, char **argv )
return 0;
usage:
fprintf( pAbc->Err, "usage: dnsize [-IJNDGT num] [-csdvwh]\n" );
fprintf( pAbc->Err, "usage: dnsize [-IJNDGTX num] [-csdvwh]\n" );
fprintf( pAbc->Err, "\t selectively decreases gate sizes while maintaining delay\n" );
fprintf( pAbc->Err, "\t-I <num> : the number of upsizing iterations to perform [default = %d]\n", pPars->nIters );
fprintf( pAbc->Err, "\t-J <num> : the number of iterations without improvement to stop [default = %d]\n", pPars->nIterNoChange );
......@@ -1170,6 +1208,7 @@ usage:
fprintf( pAbc->Err, "\t-D <num> : delay target set by the user, in picoseconds [default = %d]\n", pPars->DelayUser );
fprintf( pAbc->Err, "\t-G <num> : delay gap during updating, in picoseconds [default = %d]\n", pPars->DelayGap );
fprintf( pAbc->Err, "\t-T <num> : approximate timeout in seconds [default = %d]\n", pPars->TimeOut );
fprintf( pAbc->Err, "\t-X <num> : ratio for buffer tree estimation [default = %d]\n", pPars->BuffTreeEst );
fprintf( pAbc->Err, "\t-c : toggle using wire-loads if specified [default = %s]\n", pPars->fUseWireLoads? "yes": "no" );
fprintf( pAbc->Err, "\t-s : toggle using slack based on departure times [default = %s]\n", pPars->fUseDept? "yes": "no" );
fprintf( pAbc->Err, "\t-d : toggle dumping statistics into a file [default = %s]\n", pPars->fDumpStats? "yes": "no" );
......@@ -1234,8 +1273,8 @@ int Scl_CommandPrintBuf( Abc_Frame_t * pAbc, int argc, char **argv )
return 0;
usage:
fprintf( pAbc->Err, "usage: minsize [-vh]\n" );
fprintf( pAbc->Err, "\t downsized all gates to their minimum size\n" );
fprintf( pAbc->Err, "usage: print_buf [-vh]\n" );
fprintf( pAbc->Err, "\t prints buffers trees of the current design\n" );
fprintf( pAbc->Err, "\t-v : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
fprintf( pAbc->Err, "\t-h : print the command usage\n");
return 1;
......
src/map/scl/sclDnsize.c
......@@ -264,7 +264,7 @@ void Abc_SclDnsizePerform( SC_Lib * pLib, Abc_Ntk_t * pNtk, SC_SizePars * pPars
}
// prepare the manager; collect init stats
p = Abc_SclManStart( pLib, pNtk, pPars->fUseWireLoads, pPars->fUseDept, SC_LibTimeFromPs(pLib, pPars->DelayUser) );
p = Abc_SclManStart( pLib, pNtk, pPars->fUseWireLoads, pPars->fUseDept, SC_LibTimeFromPs(pLib, pPars->DelayUser), pPars->BuffTreeEst );
p->timeTotal = Abc_Clock();
assert( p->vGatesBest == NULL );
p->vGatesBest = Vec_IntDup( p->vGates );
......
src/map/scl/sclLib.h
......@@ -70,6 +70,7 @@ struct SC_SizePars_
int DelayUser;
int DelayGap;
int TimeOut;
int BuffTreeEst; // ratio for buffer tree estimation
int fUseDept;
int fDumpStats;
int fUseWireLoads;
......
src/map/scl/sclLoad.c
......@@ -141,6 +141,26 @@ void Abc_SclComputeLoad( SC_Man * p )
printf( "Maximum input drive strength is exceeded at primary input %d.\n", i );
}
}
// calculate average load
if ( p->EstLoadMax )
{
double TotalLoad = 0;
int nObjs = 0;
Abc_NtkForEachNode1( p->pNtk, pObj, i )
{
SC_Pair * pLoad = Abc_SclObjLoad( p, pObj );
TotalLoad += 0.5 * pLoad->fall + 0.5 * pLoad->rise;
nObjs++;
}
Abc_NtkForEachPi( p->pNtk, pObj, i )
{
SC_Pair * pLoad = Abc_SclObjLoad( p, pObj );
TotalLoad += 0.5 * pLoad->fall + 0.5 * pLoad->rise;
nObjs++;
}
p->EstLoadAve = (float)(TotalLoad / nObjs);
// printf( "Average load = %.2f\n", p->EstLoadAve );
}
}
/**Function*************************************************************
......
src/map/scl/sclSize.h
......@@ -63,6 +63,11 @@ struct SC_Man_
Vec_Flt_t * vTimesOut; // output arrival times
Vec_Que_t * vQue; // outputs by their time
SC_WireLoad * pWLoadUsed; // name of the used WireLoad model
// buffer trees
float EstLoadMax; // max ratio of Cout/Cin when this kicks in
float EstLoadAve; // average load of the gate
float EstLinear; // linear coefficient
int nEstNodes; // the number of estimations
// intermediate data
Vec_Que_t * vNodeByGain; // nodes by gain
Vec_Flt_t * vNode2Gain; // mapping node into its gain
......@@ -401,10 +406,10 @@ extern void Abc_SclUpdateLoad( SC_Man * p, Abc_Obj_t * pObj, SC_Cell *
extern Abc_Obj_t * Abc_SclFindCriticalCo( SC_Man * p, int * pfRise );
extern Abc_Obj_t * Abc_SclFindMostCriticalFanin( SC_Man * p, int * pfRise, Abc_Obj_t * pNode );
extern void Abc_SclTimeNtkPrint( SC_Man * p, int fShowAll, int fPrintPath );
extern SC_Man * Abc_SclManStart( SC_Lib * pLib, Abc_Ntk_t * pNtk, int fUseWireLoads, int fDept, float DUser );
extern SC_Man * Abc_SclManStart( SC_Lib * pLib, Abc_Ntk_t * pNtk, int fUseWireLoads, int fDept, float DUser, int nTreeCRatio );
extern void Abc_SclTimeCone( SC_Man * p, Vec_Int_t * vCone );
extern void Abc_SclTimeNtkRecompute( SC_Man * p, float * pArea, float * pDelay, int fReverse, float DUser );
extern void Abc_SclTimePerform( SC_Lib * pLib, Abc_Ntk_t * pNtk, int fUseWireLoads, int fShowAll, int fPrintPath, int fDumpStats );
extern void Abc_SclTimePerform( SC_Lib * pLib, Abc_Ntk_t * pNtk, int nTreeCRatio, int fUseWireLoads, int fShowAll, int fPrintPath, int fDumpStats );
extern void Abc_SclPrintBuffers( SC_Lib * pLib, Abc_Ntk_t * pNtk, int fVerbose );
extern int Abc_SclInputDriveOk( SC_Man * p, Abc_Obj_t * pObj, SC_Cell * pCell );
/*=== sclUpsize.c ===============================================================*/
......
src/map/scl/sclUpsize.c
......@@ -488,7 +488,7 @@ void Abc_SclUpsizePerform( SC_Lib * pLib, Abc_Ntk_t * pNtk, SC_SizePars * pPars
}
// prepare the manager; collect init stats
p = Abc_SclManStart( pLib, pNtk, pPars->fUseWireLoads, pPars->fUseDept, 0 );
p = Abc_SclManStart( pLib, pNtk, pPars->fUseWireLoads, pPars->fUseDept, 0, pPars->BuffTreeEst );
p->timeTotal = Abc_Clock();
assert( p->vGatesBest == NULL );
p->vGatesBest = Vec_IntDup( p->vGates );
......
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