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/**CFile****************************************************************
FileName [mapperCore.c]
PackageName [MVSIS 1.3: Multi-valued logic synthesis system.]
Synopsis [Generic technology mapping engine.]
Author [MVSIS Group]
Affiliation [UC Berkeley]
Date [Ver. 2.0. Started - June 1, 2004.]
Revision [$Id: mapperCore.c,v 1.7 2004/10/01 23:41:04 satrajit Exp $]
***********************************************************************/
#include "mapperInt.h"
//#include "resm.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Performs technology mapping for the given object graph.]
Description [The object graph is stored in the mapping manager.
First, the AND nodes that fanout into POs are collected in the DFS order.
Two preprocessing steps are performed: the k-feasible cuts are computed
for each node and the truth tables are computed for each cut. Next, the
delay-optimal matches are assigned for each node, followed by several
iterations of area recoveryd: using area flow (global optimization)
and using exact area at a node (local optimization).]
SideEffects []
SeeAlso []
***********************************************************************/
int Map_Mapping( Map_Man_t * p )
{
int fUseAreaFlow = 1;
int fUseExactArea = 1;
int fUseExactAreaWithPhase = 1;
int clk;
//////////////////////////////////////////////////////////////////////
// perform pre-mapping computations
// collect the nodes reachable from POs in the DFS order (including the choices)
p->vAnds = Map_MappingDfs( p, 1 );
if ( p->fVerbose )
Map_MappingReportChoices( p );
Map_MappingSetChoiceLevels( p ); // should always be called before mapping!
// return 1;
// compute the cuts of nodes in the DFS order
clk = clock();
Map_MappingCuts( p );
p->timeCuts = clock() - clk;
// derive the truth tables
clk = clock();
Map_MappingTruths( p );
p->timeTruth = clock() - clk;
//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
// compute the minimum-delay mapping
clk = clock();
p->fMappingMode = 0;
if ( !Map_MappingMatches( p ) )
return 0;
p->timeMatch = clock() - clk;
// compute the references and collect the nodes used in the mapping
Map_MappingSetRefs( p );
p->AreaBase = Map_MappingGetArea( p, p->vMapping );
if ( p->fVerbose )
{
printf( "Delay : FanViols = %5d Flow = %11.1f Area = %11.1f %4.1f %% ",
0, Map_MappingGetAreaFlow(p), p->AreaBase, 0.0 );
PRT( "Time", p->timeMatch );
}
//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
// perform area recovery using area flow
clk = clock();
if ( fUseAreaFlow )
{
// compute the required times and the fanouts
Map_TimeComputeRequiredGlobal( p );
// recover area flow
p->fMappingMode = 1;
Map_MappingMatches( p );
// compute the references and collect the nodes used in the mapping
Map_MappingSetRefs( p );
p->AreaFinal = Map_MappingGetArea( p, p->vMapping );
if ( p->fVerbose )
{
printf( "AreaFlow : FanViols = %5d Flow = %11.1f Area = %11.1f %4.1f %% ",
0, Map_MappingGetAreaFlow(p), p->AreaFinal,
100.0*(p->AreaBase-p->AreaFinal)/p->AreaBase );
PRT( "Time", clock() - clk );
}
}
p->timeArea += clock() - clk;
//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
// perform area recovery using exact area
clk = clock();
if ( fUseExactArea )
{
// compute the required times and the fanouts
Map_TimeComputeRequiredGlobal( p );
// recover area flow
p->fMappingMode = 2;
Map_MappingMatches( p );
// compute the references and collect the nodes used in the mapping
Map_MappingSetRefs( p );
p->AreaFinal = Map_MappingGetArea( p, p->vMapping );
if ( p->fVerbose )
{
printf( "Area : FanViols = %5d Flow = %11.1f Area = %11.1f %4.1f %% ",
0, 0.0, p->AreaFinal,
100.0*(p->AreaBase-p->AreaFinal)/p->AreaBase );
PRT( "Time", clock() - clk );
}
}
p->timeArea += clock() - clk;
//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
// perform area recovery using exact area
clk = clock();
if ( fUseExactAreaWithPhase )
{
// compute the required times and the fanouts
Map_TimeComputeRequiredGlobal( p );
// recover area flow
p->fMappingMode = 3;
Map_MappingMatches( p );
// compute the references and collect the nodes used in the mapping
Map_MappingSetRefs( p );
p->AreaFinal = Map_MappingGetArea( p, p->vMapping );
if ( p->fVerbose )
{
printf( "Area : FanViols = %5d Flow = %11.1f Area = %11.1f %4.1f %% ",
0, 0.0, p->AreaFinal,
100.0*(p->AreaBase-p->AreaFinal)/p->AreaBase );
PRT( "Time", clock() - clk );
}
}
p->timeArea += clock() - clk;
//////////////////////////////////////////////////////////////////////
// print the arrival times of the latest outputs
if ( p->fVerbose )
Map_MappingPrintOutputArrivals( p );
return 1;
}
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