luke
/
abc
mirror of https://github.com/YosysHQ/abc.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Experiments with LUT mapping for small functions.

This commit is contained in:
Alan Mishchenko 2021-05-01 22:44:29 -07:00
parent 645752f7d6
commit 7d90895dcf
4 changed files with 226 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

152
src/aig/gia/giaMinLut.c Normal file
View File

@ -0,0 +1,152 @@
/**CFile****************************************************************
FileName [giaMinLut.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Scalable AIG package.]
Synopsis [Collapsing AIG.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: giaMinLut.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "gia.h"
#include "giaAig.h"
#include "base/main/mainInt.h"
#include "opt/sfm/sfm.h"
#ifdef ABC_USE_CUDD
#include "bdd/extrab/extraBdd.h"
#include "bdd/dsd/dsd.h"
#endif
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
#ifdef ABC_USE_CUDD
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Gia_Man_t * Gia_ManDoMuxMapping( Gia_Man_t * p )
{
extern Gia_Man_t * Gia_ManPerformMfs( Gia_Man_t * p, Sfm_Par_t * pPars );
Gia_Man_t * pTemp, * pNew = Gia_ManDup( p );
Jf_Par_t Pars, * pPars = &Pars; int c, nIters = 2;
Sfm_Par_t Pars2, * pPars2 = &Pars2;
Lf_ManSetDefaultPars( pPars );
Sfm_ParSetDefault( pPars2 );
pPars2->nTfoLevMax = 5;
pPars2->nDepthMax = 100;
pPars2->nWinSizeMax = 2000;
for ( c = 0; c < nIters; c++ )
{
pNew = Lf_ManPerformMapping( pTemp = pNew, pPars );
Gia_ManStop( pTemp );
pNew = Gia_ManPerformMfs( pTemp = pNew, pPars2 );
Gia_ManStop( pTemp );
if ( c == nIters-1 )
break;
pNew = (Gia_Man_t *)Dsm_ManDeriveGia( pTemp = pNew, 0 );
Gia_ManStop( pTemp );
}
return pNew;
}
Gia_Man_t * Gia_ManDoMuxTransform( Gia_Man_t * p, int fReorder )
{
extern Gia_Man_t * Abc_NtkStrashToGia( Abc_Ntk_t * pNtk );
extern Abc_Ntk_t * Abc_NtkFromAigPhase( Aig_Man_t * pMan );
extern int Abc_NtkBddToMuxesPerformGlo( Abc_Ntk_t * pNtk, Abc_Ntk_t * pNtkNew, int Limit, int fReorder );
Gia_Man_t * pRes = NULL;
Aig_Man_t * pMan = Gia_ManToAig( p, 0 );
Abc_Ntk_t * pNtk = Abc_NtkFromAigPhase( pMan );
Abc_Ntk_t * pNtkNew = Abc_NtkStartFrom( pNtk, ABC_NTK_LOGIC, ABC_FUNC_SOP );
pNtk->pName = Extra_UtilStrsav( pMan->pName );
Aig_ManStop( pMan );
if ( Abc_NtkBddToMuxesPerformGlo( pNtk, pNtkNew, 1000000, fReorder ) )
{
Abc_Ntk_t * pStrash = Abc_NtkStrash( pNtkNew, 1, 1, 0 );
pRes = Abc_NtkStrashToGia( pStrash );
Abc_NtkDelete( pStrash );
}
Abc_NtkDelete( pNtkNew );
Abc_NtkDelete( pNtk );
return pRes;
}
int Gia_ManDoTest1( Gia_Man_t * p, int fReorder )
{
Gia_Man_t * pTemp, * pNew; int Res;
pNew = Gia_ManDoMuxTransform( p, fReorder );
pNew = Gia_ManDoMuxMapping( pTemp = pNew );
Gia_ManStop( pTemp );
Res = Gia_ManLutNum( pNew );
Gia_ManStop( pNew );
return Res;
}
Gia_Man_t * Gia_ManPerformMinLut( Gia_Man_t * p, int GroupSize, int LutSize, int fVerbose )
{
Gia_Man_t * pNew = NULL;
int Res1, Res2, Result = 0;
int g, nGroups = Gia_ManCoNum(p) / GroupSize;
assert( Gia_ManCoNum(p) % GroupSize == 0 );
assert( GroupSize <= 64 );
for ( g = 0; g < nGroups; g++ )
{
Gia_Man_t * pNew;//, * pTemp;
int fTrimPis = 0;
int o, pPos[64];
for ( o = 0; o < GroupSize; o++ )
pPos[o] = g*GroupSize+o;
pNew = Gia_ManDupCones( p, pPos, GroupSize, fTrimPis );
printf( "%3d / %3d : ", g, nGroups );
printf( "Test1 = %4d ", Res1 = Gia_ManDoTest1(pNew, 0) );
printf( "Test2 = %4d ", Res2 = Gia_ManDoTest1(pNew, 1) );
printf( "Test = %4d ", Abc_MinInt(Res1, Res2) );
printf( "\n" );
Result += Abc_MinInt(Res1, Res2);
//Gia_ManPrintStats( pNew, NULL );
Gia_ManStop( pNew );
}
printf( "Total LUT count = %d.\n", Result );
return pNew;
}
#else
Gia_Man_t * Gia_ManPerformMinLut( Gia_Man_t * p, int GroupSize, int LutSize, int fVerbose )
{
return NULL;
}
#endif
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END

1
src/aig/gia/module.make
View File

@ -51,6 +51,7 @@ SRC += src/aig/gia/giaAig.c \
src/aig/gia/giaMem.c \
src/aig/gia/giaMfs.c \
src/aig/gia/giaMini.c \
src/aig/gia/giaMinLut.c \
src/aig/gia/giaMuxes.c \
src/aig/gia/giaNf.c \
src/aig/gia/giaOf.c \

68
src/base/abci/abc.c
View File

@ -485,6 +485,7 @@ static int Abc_CommandAbc9Of ( Abc_Frame_t * pAbc, int argc, cha
static int Abc_CommandAbc9Pack ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Edge ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9SatLut ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9MinLut ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Unmap ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Struct ( Abc_Frame_t * pAbc, int argc, char ** argv );
static int Abc_CommandAbc9Trace ( Abc_Frame_t * pAbc, int argc, char ** argv );
@ -1208,6 +1209,7 @@ void Abc_Init( Abc_Frame_t * pAbc )
Cmd_CommandAdd( pAbc, "ABC9", "&pack", Abc_CommandAbc9Pack, 0 );
Cmd_CommandAdd( pAbc, "ABC9", "&edge", Abc_CommandAbc9Edge, 0 );
Cmd_CommandAdd( pAbc, "ABC9", "&satlut", Abc_CommandAbc9SatLut, 0 );
Cmd_CommandAdd( pAbc, "ABC9", "&minlut", Abc_CommandAbc9MinLut, 0 );
Cmd_CommandAdd( pAbc, "ABC9", "&unmap", Abc_CommandAbc9Unmap, 0 );
Cmd_CommandAdd( pAbc, "ABC9", "&struct", Abc_CommandAbc9Struct, 0 );
Cmd_CommandAdd( pAbc, "ABC9", "&trace", Abc_CommandAbc9Trace, 0 );
@ -40810,6 +40812,72 @@ usage:
return 1;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_CommandAbc9MinLut( Abc_Frame_t * pAbc, int argc, char ** argv )
{
extern Gia_Man_t * Gia_ManPerformMinLut( Gia_Man_t * p, int GroupSize, int LutSize, int fVerbose );
Gia_Man_t * pTemp;
int c, LutSize = 6, GroupSize = 3, fVerbose = 0;
Extra_UtilGetoptReset();
while ( ( c = Extra_UtilGetopt( argc, argv, "KGvh" ) ) != EOF )
{
switch ( c )
{
case 'K':
if ( globalUtilOptind >= argc )
{
Abc_Print( -1, "Command line switch \"-K\" should be followed by a positive integer.\n" );
goto usage;
}
LutSize = atoi(argv[globalUtilOptind]);
globalUtilOptind++;
break;
case 'G':
if ( globalUtilOptind >= argc )
{
Abc_Print( -1, "Command line switch \"-G\" should be followed by a positive integer.\n" );
goto usage;
}
GroupSize = atoi(argv[globalUtilOptind]);
globalUtilOptind++;
break;
case 'v':
fVerbose ^= 1;
break;
case 'h':
default:
goto usage;
}
}
if ( pAbc->pGia == NULL )
{
Abc_Print( -1, "Empty GIA network.\n" );
return 1;
}
pTemp = Gia_ManPerformMinLut( pAbc->pGia, GroupSize, LutSize, fVerbose );
//Abc_FrameUpdateGia( pAbc, pTemp );
return 0;
usage:
Abc_Print( -2, "usage: &minlut [-KG num] [-vh]\n" );
Abc_Print( -2, "\t performs specialized LUT mapping\n" );
Abc_Print( -2, "\t-K num : the LUT size for mapping [default = %d]\n", LutSize );
Abc_Print( -2, "\t-G num : the output group size [default = %d]\n", GroupSize );
Abc_Print( -2, "\t-v : toggles verbose output [default = %s]\n", fVerbose? "yes": "no" );
Abc_Print( -2, "\t-h : prints the command usage\n");
return 1;
}
/**Function*************************************************************
Synopsis []

9
src/base/abci/abcNtbdd.c
View File

@ -34,7 +34,7 @@ ABC_NAMESPACE_IMPL_START
#ifdef ABC_USE_CUDD
static int Abc_NtkBddToMuxesPerformGlo( Abc_Ntk_t * pNtk, Abc_Ntk_t * pNtkNew, int Limit );
int Abc_NtkBddToMuxesPerformGlo( Abc_Ntk_t * pNtk, Abc_Ntk_t * pNtkNew, int Limit, int fReorder );
static void Abc_NtkBddToMuxesPerform( Abc_Ntk_t * pNtk, Abc_Ntk_t * pNtkNew );
static Abc_Obj_t * Abc_NodeBddToMuxes( Abc_Obj_t * pNodeOld, Abc_Ntk_t * pNtkNew );
static Abc_Obj_t * Abc_NodeBddToMuxes_rec( DdManager * dd, DdNode * bFunc, Abc_Ntk_t * pNtkNew, st__table * tBdd2Node );
@ -135,7 +135,7 @@ Abc_Ntk_t * Abc_NtkBddToMuxes( Abc_Ntk_t * pNtk, int fGlobal, int Limit )
pNtkNew = Abc_NtkStartFrom( pNtk, ABC_NTK_LOGIC, ABC_FUNC_SOP );
if ( fGlobal )
{
if ( !Abc_NtkBddToMuxesPerformGlo( pNtk, pNtkNew, Limit ) )
if ( !Abc_NtkBddToMuxesPerformGlo( pNtk, pNtkNew, Limit, 0 ) )
{
Abc_NtkDelete( pNtkNew );
return NULL;
@ -265,13 +265,13 @@ Abc_Obj_t * Abc_NodeBddToMuxes_rec( DdManager * dd, DdNode * bFunc, Abc_Ntk_t *
SeeAlso []
***********************************************************************/
int Abc_NtkBddToMuxesPerformGlo( Abc_Ntk_t * pNtk, Abc_Ntk_t * pNtkNew, int Limit )
int Abc_NtkBddToMuxesPerformGlo( Abc_Ntk_t * pNtk, Abc_Ntk_t * pNtkNew, int Limit, int fReorder )
{
DdManager * dd;
Abc_Obj_t * pObj, * pObjNew; int i;
st__table * tBdd2Node;
assert( Abc_NtkIsStrash(pNtk) );
dd = (DdManager *)Abc_NtkBuildGlobalBdds( pNtk, Limit, 1, 1, 0, 0 );
dd = (DdManager *)Abc_NtkBuildGlobalBdds( pNtk, Limit, 1, 1, fReorder, 0 );
if ( dd == NULL )
{
printf( "Construction of global BDDs has failed.\n" );
@ -410,6 +410,7 @@ void * Abc_NtkBuildGlobalBdds( Abc_Ntk_t * pNtk, int nBddSizeMax, int fDropInter
if ( fReorder )
{
Cudd_ReduceHeap( dd, CUDD_REORDER_SYMM_SIFT, 1 );
// Cudd_ReduceHeap( dd, CUDD_REORDER_SYMM_SIFT, 1 );
Cudd_AutodynDisable( dd );
}
// Cudd_PrintInfo( dd, stdout );