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Added features 'map -M <float>' to control the use of large gates.

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This commit is contained in:
Alan Mishchenko
2012-08-27 14:29:32 -07:00
parent 9abe8b66c9
commit da6838463f
7 changed files with 76 additions and 23 deletions
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src/base/abci/abc.c
+19 -5
View File
@@ -13256,25 +13256,27 @@ int Abc_CommandMap( Abc_Frame_t * pAbc, int argc, char ** argv )
Abc_Ntk_t * pNtk, * pNtkRes;
char Buffer[100];
double DelayTarget;
double AreaMulti;
int fAreaOnly;
int fRecovery;
int fSweep;
int fSwitching;
int fVerbose;
int c;
extern Abc_Ntk_t * Abc_NtkMap( Abc_Ntk_t * pNtk, double DelayTarget, int fRecovery, int fSwitching, int fVerbose );
extern Abc_Ntk_t * Abc_NtkMap( Abc_Ntk_t * pNtk, double DelayTarget, double AreaMulti, int fRecovery, int fSwitching, int fVerbose );
extern int Abc_NtkFraigSweep( Abc_Ntk_t * pNtk, int fUseInv, int fExdc, int fVerbose, int fVeryVerbose );
pNtk = Abc_FrameReadNtk(pAbc);
// set defaults
DelayTarget =-1;
AreaMulti = 0;
fAreaOnly = 0;
fRecovery = 1;
fSweep = 1;
fSwitching = 0;
fVerbose = 0;
Extra_UtilGetoptReset();
while ( ( c = Extra_UtilGetopt( argc, argv, "Darspvh" ) ) != EOF )
while ( ( c = Extra_UtilGetopt( argc, argv, "DMarspvh" ) ) != EOF )
{
switch ( c )
{
@@ -13289,6 +13291,17 @@ int Abc_CommandMap( Abc_Frame_t * pAbc, int argc, char ** argv )
if ( DelayTarget <= 0.0 )
goto usage;
break;
case 'M':
if ( globalUtilOptind >= argc )
{
Abc_Print( -1, "Command line switch \"-M\" should be followed by a floating point number.\n" );
goto usage;
}
AreaMulti = (float)atof(argv[globalUtilOptind]);
globalUtilOptind++;
if ( AreaMulti < 0.0 )
goto usage;
break;
case 'a':
fAreaOnly ^= 1;
break;
@@ -13337,7 +13350,7 @@ int Abc_CommandMap( Abc_Frame_t * pAbc, int argc, char ** argv )
}
Abc_Print( 0, "The network was strashed and balanced before mapping.\n" );
// get the new network
pNtkRes = Abc_NtkMap( pNtk, DelayTarget, fRecovery, fSwitching, fVerbose );
pNtkRes = Abc_NtkMap( pNtk, DelayTarget, AreaMulti, fRecovery, fSwitching, fVerbose );
if ( pNtkRes == NULL )
{
Abc_NtkDelete( pNtk );
@@ -13349,7 +13362,7 @@ int Abc_CommandMap( Abc_Frame_t * pAbc, int argc, char ** argv )
else
{
// get the new network
pNtkRes = Abc_NtkMap( pNtk, DelayTarget, fRecovery, fSwitching, fVerbose );
pNtkRes = Abc_NtkMap( pNtk, DelayTarget, AreaMulti, fRecovery, fSwitching, fVerbose );
if ( pNtkRes == NULL )
{
Abc_Print( -1, "Mapping has failed.\n" );
@@ -13369,9 +13382,10 @@ usage:
sprintf( Buffer, "not used" );
else
sprintf( Buffer, "%.3f", DelayTarget );
Abc_Print( -2, "usage: map [-D float] [-arspvh]\n" );
Abc_Print( -2, "usage: map [-DM float] [-arspvh]\n" );
Abc_Print( -2, "\t performs standard cell mapping of the current network\n" );
Abc_Print( -2, "\t-D float : sets the global required times [default = %s]\n", Buffer );
Abc_Print( -2, "\t-M float : \"area multiplier\" to discourage large gates [default = %.2f]\n", AreaMulti );
Abc_Print( -2, "\t-a : toggles area-only mapping [default = %s]\n", fAreaOnly? "yes": "no" );
Abc_Print( -2, "\t-r : toggles area recovery [default = %s]\n", fRecovery? "yes": "no" );
Abc_Print( -2, "\t-s : toggles sweep after mapping [default = %s]\n", fSweep? "yes": "no" );
src/base/abci/abcMap.c
+13 -4
View File
@@ -57,7 +57,7 @@ static Abc_Obj_t * Abc_NodeFromMapSuperChoice_rec( Abc_Ntk_t * pNtkNew, Map_Sup
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkMap( Abc_Ntk_t * pNtk, double DelayTarget, int fRecovery, int fSwitching, int fVerbose )
Abc_Ntk_t * Abc_NtkMap( Abc_Ntk_t * pNtk, double DelayTarget, double AreaMulti, int fRecovery, int fSwitching, int fVerbose )
{
int fShowSwitching = 1;
Abc_Ntk_t * pNtkNew;
@@ -65,22 +65,31 @@ Abc_Ntk_t * Abc_NtkMap( Abc_Ntk_t * pNtk, double DelayTarget, int fRecovery, int
Vec_Int_t * vSwitching = NULL;
float * pSwitching = NULL;
clock_t clk, clkTotal = clock();
Mio_Library_t * pLib = Abc_FrameReadLibGen();
assert( Abc_NtkIsStrash(pNtk) );
// check that the library is available
if ( Abc_FrameReadLibGen() == NULL )
if ( pLib == NULL )
{
printf( "The current library is not available.\n" );
return 0;
}
// derive the supergate library
if ( Abc_FrameReadLibSuper() == NULL && Abc_FrameReadLibGen() )
if ( Abc_FrameReadLibSuper() == NULL && pLib )
{
// printf( "A simple supergate library is derived from gate library \"%s\".\n",
// Mio_LibraryReadName((Mio_Library_t *)Abc_FrameReadLibGen()) );
Map_SuperLibDeriveFromGenlib( (Mio_Library_t *)Abc_FrameReadLibGen() );
// penalize large gates by increasing their area
Mio_LibraryShiftArea( pLib, AreaMulti );
// compute supergate library to be used for mapping
Map_SuperLibDeriveFromGenlib( pLib );
// return the library to normal
Mio_LibraryShiftArea( Abc_FrameReadLibGen(), -AreaMulti );
if ( AreaMulti != 0.0 )
printf( "The cell areas are multiplied by the factor: <num_fanins> ^ (%.2f).\n", AreaMulti );
}
// print a warning about choice nodes