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Diffstat (limited to 'src/base/abci/abcSymm.c')
| -rw-r--r-- | src/base/abci/abcSymm.c | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/src/base/abci/abcSymm.c b/src/base/abci/abcSymm.c new file mode 100644 index 00000000..f9229639 --- /dev/null +++ b/src/base/abci/abcSymm.c @@ -0,0 +1,221 @@ +/**CFile**************************************************************** + + FileName [abcSymm.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Network and node package.] + + Synopsis [Computation of two-variable symmetries.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 20, 2005.] + + Revision [$Id: abcSymm.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "abc.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static void Abc_NtkSymmetriesUsingBdds( Abc_Ntk_t * pNtk, int fNaive, int fVerbose ); +static void Abc_NtkSymmetriesUsingSandS( Abc_Ntk_t * pNtk, int fVerbose ); +static void Ntk_NetworkSymmsBdd( DdManager * dd, Abc_Ntk_t * pNtk, int fNaive, int fVerbose ); +static void Ntk_NetworkSymmsPrint( Abc_Ntk_t * pNtk, Extra_SymmInfo_t * pSymms ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [The top level procedure to compute symmetries.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Abc_NtkSymmetries( Abc_Ntk_t * pNtk, int fUseBdds, int fNaive, int fVerbose ) +{ + if ( fUseBdds || fNaive ) + Abc_NtkSymmetriesUsingBdds( pNtk, fNaive, fVerbose ); + else + Abc_NtkSymmetriesUsingSandS( pNtk, fVerbose ); +} + +/**Function************************************************************* + + Synopsis [Symmetry computation using simulation and SAT.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Abc_NtkSymmetriesUsingSandS( Abc_Ntk_t * pNtk, int fVerbose ) +{ + extern int Sim_ComputeTwoVarSymms( Abc_Ntk_t * pNtk ); + int nSymms = Sim_ComputeTwoVarSymms( pNtk ); + printf( "The total number of symmetries is %d.\n", nSymms ); +} + +/**Function************************************************************* + + Synopsis [Symmetry computation using BDDs (both naive and smart).] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Abc_NtkSymmetriesUsingBdds( Abc_Ntk_t * pNtk, int fNaive, int fVerbose ) +{ + DdManager * dd; + int clk, clkBdd, clkSym; + + // compute the global functions +clk = clock(); + dd = Abc_NtkGlobalBdds( pNtk, 0 ); + Cudd_AutodynDisable( dd ); + Cudd_zddVarsFromBddVars( dd, 2 ); +clkBdd = clock() - clk; + // create the collapsed network +clk = clock(); + Ntk_NetworkSymmsBdd( dd, pNtk, fNaive, fVerbose ); +clkSym = clock() - clk; + // undo the global functions + Abc_NtkFreeGlobalBdds( pNtk ); + Extra_StopManager( dd ); + pNtk->pManGlob = NULL; + +PRT( "Constructing BDDs", clkBdd ); +PRT( "Computing symms ", clkSym ); +PRT( "TOTAL ", clkBdd + clkSym ); +} + +/**Function************************************************************* + + Synopsis [Symmetry computation using BDDs (both naive and smart).] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ntk_NetworkSymmsBdd( DdManager * dd, Abc_Ntk_t * pNtk, int fNaive, int fVerbose ) +{ + Extra_SymmInfo_t * pSymms; + Abc_Obj_t * pNode; + DdNode * bFunc; + int nSymms = 0; + int i; + + // compute symmetry info for each PO + Abc_NtkForEachCo( pNtk, pNode, i ) + { + bFunc = pNtk->vFuncsGlob->pArray[i]; + if ( Cudd_IsConstant(bFunc) ) + continue; + if ( fNaive ) + pSymms = Extra_SymmPairsComputeNaive( dd, bFunc ); + else + pSymms = Extra_SymmPairsCompute( dd, bFunc ); + nSymms += pSymms->nSymms; + if ( fVerbose ) + { + printf( "Output %6s (%d): ", Abc_ObjName(pNode), pSymms->nSymms ); + Ntk_NetworkSymmsPrint( pNtk, pSymms ); + } +//Extra_SymmPairsPrint( pSymms ); + Extra_SymmPairsDissolve( pSymms ); + } + printf( "The total number of symmetries is %d.\n", nSymms ); +} + +/**Function************************************************************* + + Synopsis [Printing symmetry groups from the symmetry data structure.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ntk_NetworkSymmsPrint( Abc_Ntk_t * pNtk, Extra_SymmInfo_t * pSymms ) +{ + char ** pInputNames; + int * pVarTaken; + int i, k, nVars, nSize, fStart; + + // get variable names + nVars = Abc_NtkCiNum(pNtk); + pInputNames = Abc_NtkCollectCioNames( pNtk, 0 ); + + // alloc the array of marks + pVarTaken = ALLOC( int, nVars ); + memset( pVarTaken, 0, sizeof(int) * nVars ); + + // print the groups + fStart = 1; + nSize = pSymms->nVars; + for ( i = 0; i < nSize; i++ ) + { + // skip the variable already considered + if ( pVarTaken[i] ) + continue; + // find all the vars symmetric with this one + for ( k = 0; k < nSize; k++ ) + { + if ( k == i ) + continue; + if ( pSymms->pSymms[i][k] == 0 ) + continue; + // vars i and k are symmetric + assert( pVarTaken[k] == 0 ); + // there is a new symmetry pair + if ( fStart == 1 ) + { // start a new symmetry class + fStart = 0; + printf( " { %s", pInputNames[ pSymms->pVars[i] ] ); + // mark the var as taken + pVarTaken[i] = 1; + } + printf( " %s", pInputNames[ pSymms->pVars[k] ] ); + // mark the var as taken + pVarTaken[k] = 1; + } + if ( fStart == 0 ) + { + printf( " }" ); + fStart = 1; + } + } + printf( "\n" ); + + free( pInputNames ); + free( pVarTaken ); +} + + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + |