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Commit 6c19c1df by Alan Mishchenko
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Delay optimization using precomputed library.

parent fce98abf
Showing with 104 additions and 16 deletions
src/base/abc/abc.h
......@@ -772,13 +772,14 @@ extern ABC_DLL void Abc_NtkShow6VarFunc( char * pF0, char * pF1 );
extern ABC_DLL int Abc_NtkMiterProve( Abc_Ntk_t ** ppNtk, void * pParams );
extern ABC_DLL int Abc_NtkIvyProve( Abc_Ntk_t ** ppNtk, void * pPars );
/*=== abcRec.c ==========================================================*/
extern ABC_DLL void Abc_NtkRecStart( Abc_Ntk_t * pNtk, int nVars, int nCuts );
extern ABC_DLL void Abc_NtkRecStart( Abc_Ntk_t * pNtk, int nVars, int nCuts, int fTrim );
extern ABC_DLL void Abc_NtkRecStop();
extern ABC_DLL void Abc_NtkRecAdd( Abc_Ntk_t * pNtk );
extern ABC_DLL void Abc_NtkRecPs();
extern ABC_DLL void Abc_NtkRecFilter( int iVar, int iPlus );
extern ABC_DLL void Abc_NtkRecFilter(int nLimit);
extern ABC_DLL Abc_Ntk_t * Abc_NtkRecUse();
extern ABC_DLL int Abc_NtkRecIsRunning();
extern ABC_DLL int Abc_NtkRecIsInTrimMode();
extern ABC_DLL int Abc_NtkRecVarNum();
extern ABC_DLL Vec_Int_t * Abc_NtkRecMemory();
extern ABC_DLL int Abc_NtkRecStrashNode( Abc_Ntk_t * pNtkNew, Abc_Obj_t * pObj, unsigned * pTruth, int nVars );
......
src/base/abci/abc.c
......@@ -211,6 +211,7 @@ static int Abc_CommandRecStop ( Abc_Frame_t * pAbc, int argc, cha
static int Abc_CommandRecAdd ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRecPs ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRecUse ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandRecFilter ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandMap ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAmap ( Abc_Frame_t * pAbc, int argc, char ** argv );
......@@ -668,6 +669,7 @@ void Abc_Init( Abc_Frame_t * pAbc )
Cmd_CommandAdd( pAbc, "Choicing", "rec_add", Abc_CommandRecAdd, 0 );
Cmd_CommandAdd( pAbc, "Choicing", "rec_ps", Abc_CommandRecPs, 0 );
Cmd_CommandAdd( pAbc, "Choicing", "rec_use", Abc_CommandRecUse, 1 );
Cmd_CommandAdd( pAbc, "Choicing", "rec_filter", Abc_CommandRecFilter, 1 );
Cmd_CommandAdd( pAbc, "SC mapping", "map", Abc_CommandMap, 1 );
Cmd_CommandAdd( pAbc, "SC mapping", "amap", Abc_CommandAmap, 1 );
......@@ -11935,13 +11937,15 @@ int Abc_CommandRecStart( Abc_Frame_t * pAbc, int argc, char ** argv )
int c;
int nVars;
int nCuts;
int fTrim;
pNtk = Abc_FrameReadNtk(pAbc);
// set defaults
nVars = 6;
nCuts = 8;
fTrim = 0;
Extra_UtilGetoptReset();
while ( ( c = Extra_UtilGetopt( argc, argv, "KCh" ) ) != EOF )
while ( ( c = Extra_UtilGetopt( argc, argv, "KCth" ) ) != EOF )
{
switch ( c )
{
......@@ -11967,6 +11971,9 @@ int Abc_CommandRecStart( Abc_Frame_t * pAbc, int argc, char ** argv )
if ( nCuts < 1 )
goto usage;
break;
case 't':
fTrim ^= 1;
break;
case 'h':
goto usage;
default:
......@@ -11988,15 +11995,16 @@ int Abc_CommandRecStart( Abc_Frame_t * pAbc, int argc, char ** argv )
Abc_Print( -1, "This command works only for AIGs; run strashing (\"st\").\n" );
return 0;
}
Abc_NtkRecStart( pNtk, nVars, nCuts );
Abc_NtkRecStart( pNtk, nVars, nCuts, fTrim );
return 0;
usage:
Abc_Print( -2, "usage: rec_start [-K num] [-C num] [-h]\n" );
Abc_Print( -2, "usage: rec_start [-K num] [-C num] [-th]\n" );
Abc_Print( -2, "\t starts recording AIG subgraphs (should be called for\n" );
Abc_Print( -2, "\t an empty network or after reading in a previous record)\n" );
Abc_Print( -2, "\t-K num : the largest number of inputs [default = %d]\n", nVars );
Abc_Print( -2, "\t-C num : the max number of cuts used at a node (0 < num < 2^12) [default = %d]\n", nCuts );
Abc_Print( -2, "\t-t : toggles the use of trimming [default = %s]\n", fTrim? "yes": "no" );
Abc_Print( -2, "\t-h : print the command usage\n");
return 1;
}
......@@ -12195,6 +12203,64 @@ usage:
SeeAlso []
***********************************************************************/
int Abc_CommandRecFilter( Abc_Frame_t * pAbc, int argc, char ** argv )
{
Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc);
int c, nLimit = 0;
// set defaults
Extra_UtilGetoptReset();
while ( ( c = Extra_UtilGetopt( argc, argv, "Fh" ) ) != EOF )
{
switch ( c )
{
case 'F':
if ( globalUtilOptind >= argc )
{
Abc_Print( -1, "Command line switch \"-F\" should be followed by an integer.\n" );
goto usage;
}
nLimit = atoi(argv[globalUtilOptind]);
globalUtilOptind++;
if ( nLimit < 0 )
goto usage;
break;
case 'h':
goto usage;
default:
goto usage;
}
}
if ( !Abc_NtkRecIsRunning() )
{
Abc_Print( -1, "This command works for AIGs only after calling \"rec_start\".\n" );
return 0;
}
if (!Abc_NtkRecIsInTrimMode())
Abc_Print( 0, "This command works fine only in trim mode. Please call \"rec_start -t\" first.\n" );
Abc_NtkRecFilter(nLimit);
return 0;
usage:
Abc_Print( -2, "usage: rec_filter [-h]\n" );
Abc_Print( -2, "\t filter the library of the recorder\n" );
Abc_Print( -2, "\t-F num : the limit number of function class [default = %d]\n", nLimit );
Abc_Print( -2, "\t-h : print the command usage\n");
return 1;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_CommandMap( Abc_Frame_t * pAbc, int argc, char ** argv )
{
Abc_Ntk_t * pNtk, * pNtkRes;
......@@ -13090,7 +13156,7 @@ int Abc_CommandIf( Abc_Frame_t * pAbc, int argc, char ** argv )
fLutMux = 0;
Extra_UtilGetoptReset();
while ( ( c = Extra_UtilGetopt( argc, argv, "KCFADEWSqaflepmrsdbugojikcvh" ) ) != EOF )
while ( ( c = Extra_UtilGetopt( argc, argv, "KCFADEWSqaflepmrsdbugyojikcvh" ) ) != EOF )
{
switch ( c )
{
......@@ -13226,6 +13292,9 @@ int Abc_CommandIf( Abc_Frame_t * pAbc, int argc, char ** argv )
case 'g':
pPars->fDelayOpt ^= 1;
break;
case 'y':
pPars->fUserRecLib ^= 1;
break;
case 'o':
pPars->fUseBuffs ^= 1;
break;
......@@ -13375,7 +13444,7 @@ int Abc_CommandIf( Abc_Frame_t * pAbc, int argc, char ** argv )
}
// modify for global delay optimization
if ( pPars->fDelayOpt )
if ( pPars->fDelayOpt || pPars->fUserRecLib )
{
pPars->fTruth = 1;
pPars->fExpRed = 0;
......@@ -13459,7 +13528,7 @@ usage:
sprintf( LutSize, "library" );
else
sprintf( LutSize, "%d", pPars->nLutSize );
Abc_Print( -2, "usage: if [-KCFA num] [-DEW float] [-S str] [-qarlepmsdbugojikcvh]\n" );
Abc_Print( -2, "usage: if [-KCFA num] [-DEW float] [-S str] [-qarlepmsdbugyojikcvh]\n" );
Abc_Print( -2, "\t performs FPGA technology mapping of the network\n" );
Abc_Print( -2, "\t-K num : the number of LUT inputs (2 < num < %d) [default = %s]\n", IF_MAX_LUTSIZE+1, LutSize );
Abc_Print( -2, "\t-C num : the max number of priority cuts (0 < num < 2^12) [default = %d]\n", pPars->nCutsMax );
......@@ -13482,6 +13551,7 @@ usage:
Abc_Print( -2, "\t-b : toggles the use of one special feature [default = %s]\n", pPars->fUseBat? "yes": "no" );
Abc_Print( -2, "\t-u : toggles the use of MUXes along with LUTs [default = %s]\n", fLutMux? "yes": "no" );
Abc_Print( -2, "\t-g : toggles global delay optimization [default = %s]\n", pPars->fDelayOpt? "yes": "no" );
Abc_Print( -2, "\t-y : toggles delay optimization with recorded library [default = %s]\n", pPars->fUserRecLib? "yes": "no" );
Abc_Print( -2, "\t-o : toggles using buffers to decouple combinational outputs [default = %s]\n", pPars->fUseBuffs? "yes": "no" );
Abc_Print( -2, "\t-j : toggles enabling additional check [default = %s]\n", pPars->fEnableCheck07? "yes": "no" );
Abc_Print( -2, "\t-i : toggles enabling additional check [default = %s]\n", pPars->fEnableCheck08? "yes": "no" );
......
src/base/abci/abcIf.c
......@@ -83,7 +83,7 @@ void Abc_NtkIfComputeSwitching( Abc_Ntk_t * pNtk, If_Man_t * pIfMan )
if ( (pObjAig = (Aig_Obj_t *)pObjAbc->pTemp) )
{
pObjAbc->dTemp = pSwitching[pObjAig->Id];
// J. Anderson and F. N. Najm, Power-Aware Technology Mapping for LUT-Based FPGAs,
// J. Anderson and F. N. Najm, Power-Aware Technology Mapping for LUT-Based FPGAs,
// IEEE Intl. Conf. on Field-Programmable Technology, 2002.
// pObjAbc->dTemp = (1.55 + 1.05 / (float) Abc_ObjFanoutNum(pObjAbc)) * pSwitching[pObjAig->Id];
}
......@@ -436,7 +436,7 @@ Abc_Obj_t * Abc_NodeFromIf_rec( Abc_Ntk_t * pNtkNew, If_Man_t * pIfMan, If_Obj_t
pCutBest = If_ObjCutBest( pIfObj );
// printf( "%d 0x%02X %d\n", pCutBest->nLeaves, 0xff & *If_CutTruth(pCutBest), pIfMan->pPars->pFuncCost(pCutBest) );
// if ( pIfMan->pPars->pLutLib && pIfMan->pPars->pLutLib->fVarPinDelays )
if ( !pIfMan->pPars->fDelayOpt && !pIfMan->pPars->pLutStruct )
if ( !pIfMan->pPars->fDelayOpt && !pIfMan->pPars->pLutStruct && !pIfMan->pPars->fUserRecLib )
If_CutRotatePins( pIfMan, pCutBest );
if ( pIfMan->pPars->fUseCnfs || pIfMan->pPars->fUseMv )
{
......@@ -488,6 +488,11 @@ Abc_Obj_t * Abc_NodeFromIf_rec( Abc_Ntk_t * pNtkNew, If_Man_t * pIfMan, If_Obj_t
extern Hop_Obj_t * Abc_NodeTruthToHop( Hop_Man_t * pMan, If_Man_t * pIfMan, If_Cut_t * pCut );
pNodeNew->pData = Abc_NodeTruthToHop( (Hop_Man_t *)pNtkNew->pManFunc, pIfMan, pCutBest );
}
else if ( pIfMan->pPars->fUserRecLib )
{
extern Hop_Obj_t * Abc_RecToHop( Hop_Man_t * pMan, If_Man_t * pIfMan, If_Cut_t * pCut );
pNodeNew->pData = Abc_RecToHop( (Hop_Man_t *)pNtkNew->pManFunc, pIfMan, pCutBest );
}
else
{
extern Hop_Obj_t * Kit_TruthToHop( Hop_Man_t * pMan, unsigned * pTruth, int nVars, Vec_Int_t * vMemory );
......
src/map/if/if.h
......@@ -105,6 +105,7 @@ struct If_Par_t_
float WireDelay; // wire delay
// internal parameters
int fDelayOpt; // special delay optimization
int fUserRecLib; // use recorded library
int fAreaOnly; // area only mode
int fTruth; // truth table computation enabled
int fUsePerm; // use permutation (delay info)
......@@ -497,6 +498,9 @@ extern Vec_Int_t * If_ManCollectMappingInt( If_Man_t * p );
extern int If_ManCountSpecialPos( If_Man_t * p );
/*=== abcRec.c ============================================================*/
extern int If_CutDelayRecCost(If_Man_t* p, If_Cut_t* pCut);
// othe packages
extern int Bat_ManCellFuncLookup( unsigned * pTruth, int nVars, int nLeaves );
......
src/map/if/ifMap.c
......@@ -20,8 +20,8 @@
#include "if.h"
ABC_NAMESPACE_IMPL_START
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
......@@ -156,8 +156,10 @@ void If_ObjPerformMappingAnd( If_Man_t * p, If_Obj_t * pObj, int Mode, int fPrep
/// if ( p->pPars->pLutStruct )
/// pCut->Delay = If_CutDelayLutStruct( p, pCut, p->pPars->pLutStruct, p->pPars->WireDelay );
// else if ( p->pPars->fDelayOpt )
if ( p->pPars->fDelayOpt )
pCut->Delay = If_CutDelaySopCost( p, pCut );
if ( p->pPars->fUserRecLib )
pCut->Delay = If_CutDelayRecCost(p, pCut);
else if(p->pPars->fDelayOpt)
pCut->Delay = If_CutDelaySopCost(p,pCut);
else
pCut->Delay = If_CutDelay( p, pObj, pCut );
// assert( pCut->Delay <= pObj->Required + p->fEpsilon );
......@@ -224,8 +226,10 @@ void If_ObjPerformMappingAnd( If_Man_t * p, If_Obj_t * pObj, int Mode, int fPrep
/// if ( p->pPars->pLutStruct )
/// pCut->Delay = If_CutDelayLutStruct( p, pCut, p->pPars->pLutStruct, p->pPars->WireDelay );
// else if ( p->pPars->fDelayOpt )
if ( p->pPars->fDelayOpt )
pCut->Delay = If_CutDelaySopCost( p, pCut );
if ( p->pPars->fUserRecLib )
pCut->Delay = If_CutDelayRecCost(p, pCut);
else if (p->pPars->fDelayOpt)
pCut->Delay = If_CutDelaySopCost(p, pCut);
else
pCut->Delay = If_CutDelay( p, pObj, pCut );
// Abc_Print( 1, "%.2f ", pCut->Delay );
......@@ -252,9 +256,12 @@ void If_ObjPerformMappingAnd( If_Man_t * p, If_Obj_t * pObj, int Mode, int fPrep
// update the best cut
if ( !fPreprocess || pCutSet->ppCuts[0]->Delay <= pObj->Required + p->fEpsilon )
{
If_CutCopy( p, If_ObjCutBest(pObj), pCutSet->ppCuts[0] );
if(p->pPars->fUserRecLib)
assert(If_ObjCutBest(pObj)->Cost < IF_COST_MAX && If_ObjCutBest(pObj)->Delay < ABC_INFINITY);
}
assert( p->pPars->fSeqMap || If_ObjCutBest(pObj)->nLeaves > 1 );
// ref the selected cut
if ( Mode && pObj->nRefs > 0 )
If_CutAreaRef( p, If_ObjCutBest(pObj) );
......@@ -266,6 +273,7 @@ void If_ObjPerformMappingAnd( If_Man_t * p, If_Obj_t * pObj, int Mode, int fPrep
If_ObjForEachCut( pObj, pCut, i )
p->pPars->pFuncUser( p, pObj, pCut );
// free the cuts
If_ManDerefNodeCutSet( p, pObj );
}
......
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