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| author | Alan Mishchenko <alanmi@berkeley.edu> | 2005-09-05 08:01:00 -0700 |
|---|---|---|
| committer | Alan Mishchenko <alanmi@berkeley.edu> | 2005-09-05 08:01:00 -0700 |
| commit | 1260d20cc05fe2d21088cc047c460e85ccdb3b14 (patch) | |
| tree | f10ccc3333f78b6e2e089a88c8cf61a47b2f2dcd /src/base/abci/abcRewrite.c | |
| parent | 33012d9530c40817e1fc5230b3e663f7690b2e94 (diff) | |
| download | abc-1260d20cc05fe2d21088cc047c460e85ccdb3b14.tar.gz abc-1260d20cc05fe2d21088cc047c460e85ccdb3b14.tar.bz2 abc-1260d20cc05fe2d21088cc047c460e85ccdb3b14.zip | |
Version abc50905
Diffstat (limited to 'src/base/abci/abcRewrite.c')
| -rw-r--r-- | src/base/abci/abcRewrite.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/src/base/abci/abcRewrite.c b/src/base/abci/abcRewrite.c index 75fe1627..ea221296 100644 --- a/src/base/abci/abcRewrite.c +++ b/src/base/abci/abcRewrite.c @@ -1,12 +1,12 @@ /**CFile**************************************************************** - FileName [abcRes.c] + FileName [abcRewrite.c] SystemName [ABC: Logic synthesis and verification system.] PackageName [Network and node package.] - Synopsis [Technology-independent resynthesis of the AIG.] + Synopsis [Technology-independent resynthesis of the AIG based on DAG aware rewriting.] Author [Alan Mishchenko] @@ -14,7 +14,7 @@ Date [Ver. 1.0. Started - June 20, 2005.] - Revision [$Id: abcRes.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $] + Revision [$Id: abcRewrite.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $] ***********************************************************************/ @@ -22,6 +22,12 @@ #include "rwr.h" #include "dec.h" +/* + The ideas realized in this package are inspired by the paper: + Per Bjesse, Arne Boralv, "DAG-aware circuit compression for + formal verification", Proc. ICCAD 2004, pp. 42-49. +*/ + //////////////////////////////////////////////////////////////////////// /// DECLARATIONS /// //////////////////////////////////////////////////////////////////////// @@ -46,7 +52,6 @@ static void Abc_NodePrintCuts( Abc_Obj_t * pNode ); ***********************************************************************/ int Abc_NtkRewrite( Abc_Ntk_t * pNtk, int fUseZeros, int fVerbose ) { - int fCheck = 1; int fDrop = 0; ProgressBar * pProgress; Cut_Man_t * pManCut; @@ -81,6 +86,9 @@ Rwr_ManAddTimeCuts( pManRwr, clock() - clk ); // skip the constant node if ( Abc_NodeIsConst(pNode) ) continue; + // skip the nodes with many fanouts + if ( Abc_ObjFanoutNum(pNode) > 1000 ) + continue; // for each cut, try to resynthesize it nGain = Rwr_NodeRewrite( pManRwr, pManCut, pNode, fUseZeros ); if ( nGain > 0 || nGain == 0 && fUseZeros ) @@ -104,7 +112,7 @@ Rwr_ManAddTimeTotal( pManRwr, clock() - clkStart ); pNtk->pManCut = NULL; Abc_NtkStopReverseLevels( pNtk ); // check - if ( fCheck && !Abc_NtkCheck( pNtk ) ) + if ( !Abc_NtkCheck( pNtk ) ) { printf( "Abc_NtkRewrite: The network check has failed.\n" ); return 0; |