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Commit b90f1c73 by Alan Mishchenko
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Adding switch -N to 'super' to set an upper bound on the number of supergates generated.

parent b30791ba
Showing with 84 additions and 48 deletions
src/map/super/super.c
......@@ -94,17 +94,17 @@ int Super_CommandSupergatesAnd( Abc_Frame_t * pAbc, int argc, char **argv )
nLevels = 3;
fVerbose = 0;
Extra_UtilGetoptReset();
while ( (c = Extra_UtilGetopt(argc, argv, "ilvh")) != EOF )
while ( (c = Extra_UtilGetopt(argc, argv, "ILvh")) != EOF )
{
switch (c)
{
case 'i':
case 'I':
nVarsMax = atoi(argv[globalUtilOptind]);
globalUtilOptind++;
if ( nVarsMax < 0 )
goto usage;
break;
case 'l':
case 'L':
nLevels = atoi(argv[globalUtilOptind]);
globalUtilOptind++;
if ( nLevels < 0 )
......@@ -126,10 +126,10 @@ int Super_CommandSupergatesAnd( Abc_Frame_t * pAbc, int argc, char **argv )
return 0;
usage:
fprintf( pErr, "usage: super2 [-i num] [-l num] [-vh]\n");
fprintf( pErr, "usage: super2 [-IL num] [-vh]\n");
fprintf( pErr, "\t precomputes the supergates composed of AND2s and INVs\n" );
fprintf( pErr, "\t-i num : the max number of inputs to the supergate [default = %d]\n", nVarsMax );
fprintf( pErr, "\t-l num : the max number of logic levels of gates [default = %d]\n", nLevels );
fprintf( pErr, "\t-I num : the max number of inputs to the supergate [default = %d]\n", nVarsMax );
fprintf( pErr, "\t-L num : the max number of logic levels of gates [default = %d]\n", nLevels );
fprintf( pErr, "\t-v : enable verbose output\n");
fprintf( pErr, "\t-h : print the help message\n");
return 1; /* error exit */
......@@ -157,7 +157,7 @@ int Super_CommandSupergates( Abc_Frame_t * pAbc, int argc, char **argv )
float AreaLimit;
int fSkipInvs;
int fWriteOldFormat;
int nVarsMax, nLevels, TimeLimit;
int nVarsMax, nLevels, nGatesMax, TimeLimit;
int fVerbose;
int c;
......@@ -169,6 +169,7 @@ int Super_CommandSupergates( Abc_Frame_t * pAbc, int argc, char **argv )
nLevels = 3;
DelayLimit = 3.5;
AreaLimit = 9;
nGatesMax = 10000;
TimeLimit = 10;
fSkipInvs = 1;
fVerbose = 0;
......@@ -176,46 +177,52 @@ int Super_CommandSupergates( Abc_Frame_t * pAbc, int argc, char **argv )
ExcludeFile = 0;
Extra_UtilGetoptReset();
while ( (c = Extra_UtilGetopt(argc, argv, "eiltdasovh")) != EOF )
while ( (c = Extra_UtilGetopt(argc, argv, "ILNTDAEsovh")) != EOF )
{
switch (c)
{
case 'e':
ExcludeFile = argv[globalUtilOptind];
if ( ExcludeFile == 0 )
goto usage;
globalUtilOptind++;
break;
case 'i':
case 'I':
nVarsMax = atoi(argv[globalUtilOptind]);
globalUtilOptind++;
if ( nVarsMax < 0 )
goto usage;
break;
case 'l':
case 'L':
nLevels = atoi(argv[globalUtilOptind]);
globalUtilOptind++;
if ( nLevels < 0 )
goto usage;
break;
case 't':
case 'N':
nGatesMax = atoi(argv[globalUtilOptind]);
globalUtilOptind++;
if ( nGatesMax < 0 )
goto usage;
break;
case 'T':
TimeLimit = atoi(argv[globalUtilOptind]);
globalUtilOptind++;
if ( TimeLimit < 0 )
goto usage;
break;
case 'd':
case 'D':
DelayLimit = (float)atof(argv[globalUtilOptind]);
globalUtilOptind++;
if ( DelayLimit <= 0.0 )
goto usage;
break;
case 'a':
case 'A':
AreaLimit = (float)atof(argv[globalUtilOptind]);
globalUtilOptind++;
if ( AreaLimit <= 0.0 )
goto usage;
break;
case 'E':
ExcludeFile = argv[globalUtilOptind];
if ( ExcludeFile == 0 )
goto usage;
globalUtilOptind++;
break;
case 's':
fSkipInvs ^= 1;
break;
......@@ -268,41 +275,42 @@ int Super_CommandSupergates( Abc_Frame_t * pAbc, int argc, char **argv )
}
// compute the gates
Super_Precompute( pLib, nVarsMax, nLevels, DelayLimit, AreaLimit, TimeLimit, fSkipInvs, fWriteOldFormat, fVerbose );
Super_Precompute( pLib, nVarsMax, nLevels, nGatesMax, DelayLimit, AreaLimit, TimeLimit, fSkipInvs, fWriteOldFormat, fVerbose );
// delete the library
Mio_LibraryDelete( pLib );
return 0;
usage:
fprintf( pErr, "usage: super [-i num] [-l num] [-d float] [-a float] [-t num] [-sovh] <genlib_file>\n");
fprintf( pErr, "usage: super [-ILNT num] [-DA float] [-E file] [-sovh] <genlib_file>\n");
fprintf( pErr, "\t precomputes the supergates for the given GENLIB library\n" );
fprintf( pErr, "\t-i num : the max number of supergate inputs [default = %d]\n", nVarsMax );
fprintf( pErr, "\t-l num : the max number of levels of gates [default = %d]\n", nLevels );
fprintf( pErr, "\t-d float : the max delay of the supergates [default = %.2f]\n", DelayLimit );
fprintf( pErr, "\t-a float : the max area of the supergates [default = %.2f]\n", AreaLimit );
fprintf( pErr, "\t-t num : the approximate runtime limit in seconds [default = %d]\n", TimeLimit );
fprintf( pErr, "\t-I num : the max number of supergate inputs [default = %d]\n", nVarsMax );
fprintf( pErr, "\t-L num : the max number of levels of gates [default = %d]\n", nLevels );
fprintf( pErr, "\t-N num : the limit on the number of considered supergates [default = %d]\n", nGatesMax );
fprintf( pErr, "\t-T num : the approximate runtime limit in seconds [default = %d]\n", TimeLimit );
fprintf( pErr, "\t-D float : the max delay of the supergates [default = %.2f]\n", DelayLimit );
fprintf( pErr, "\t-A float : the max area of the supergates [default = %.2f]\n", AreaLimit );
fprintf( pErr, "\t-E file : file contains list of genlib gates to exclude\n" );
fprintf( pErr, "\t-s : toggle the use of inverters at the inputs [default = %s]\n", (fSkipInvs? "no": "yes") );
fprintf( pErr, "\t-o : toggle dumping the supergate library in old format [default = %s]\n", (fWriteOldFormat? "yes": "no") );
fprintf( pErr, "\t-e file : file contains list of genlib gates to exclude\n" );
fprintf( pErr, "\t-v : enable verbose output [default = %s]\n", (fVerbose? "yes" : "no") );
fprintf( pErr, "\t-h : print the help message\n");
fprintf( pErr, "\n");
fprintf( pErr, "\tHere is a piece of advice on precomputing supergate libraries:\n");
fprintf( pErr, "\t\n");
fprintf( pErr, "\tStart with the number of inputs equal to 5 (-i 5), the number of \n");
fprintf( pErr, "\tlevels equal to 3 (-l 3), the delay equal to 2-3 delays of inverter, \n");
fprintf( pErr, "\tthe area equal to 3-4 areas of two input NAND, and runtime limit equal \n");
fprintf( pErr, "\tto 10 seconds (-t 10). Run precomputation and learn from the result.\n");
fprintf( pErr, "\tStart with the number of inputs equal to 5 (-I 5), the number of \n");
fprintf( pErr, "\tlevels equal to 2 (-L 2), the delay equal to 2-3 delays of inverter, \n");
fprintf( pErr, "\tthe area equal to 2-3 areas of two input NAND, and runtime limit equal \n");
fprintf( pErr, "\tto 10 seconds (-T 10). Run precomputation and learn from the result.\n");
fprintf( pErr, "\tDetermine what parameter is most constraining and try to increase \n");
fprintf( pErr, "\tthe value of that parameter. The goal is to have a well-balanced\n");
fprintf( pErr, "\tset of constraints and the resulting supergate library containing\n");
fprintf( pErr, "\tapproximately 100K-200K supergates. Typically, it is better to increase\n");
fprintf( pErr, "\tapproximately 5K-20K supergates. Typically, it is better to increase\n");
fprintf( pErr, "\tdelay limit rather than area limit, because having large-area supergates\n");
fprintf( pErr, "\tmay result in a considerable increase in area.\n");
fprintf( pErr, "\t\n");
fprintf( pErr, "\tNote that a good supergate library for experiments typically can be \n");
fprintf( pErr, "\tprecomputed in 30 sec. Increasing the runtime limit makes sense when\n");
fprintf( pErr, "\tprecomputed in 30 sec or less. Increasing runtime limit makes sense when\n");
fprintf( pErr, "\tother parameters are well-balanced and it is needed to enumerate more\n");
fprintf( pErr, "\tchoices to have a good result. In the end, to compute the final library\n");
fprintf( pErr, "\tthe runtime can be set to 300 sec to ensure the ultimate quality.\n");
......
src/map/super/superInt.h
......@@ -57,7 +57,7 @@ ABC_NAMESPACE_HEADER_START
/*=== superAnd.c =============================================================*/
extern void Super2_Precompute( int nInputs, int nLevels, int fVerbose );
/*=== superGate.c =============================================================*/
extern void Super_Precompute( Mio_Library_t * pLibGen, int nInputs, int nLevels, float tDelayMax, float tAreaMax, int TimeLimit, int fSkipInv, int fWriteOldFormat, int fVerbose );
extern void Super_Precompute( Mio_Library_t * pLibGen, int nInputs, int nLevels, int nGatesMax, float tDelayMax, float tAreaMax, int TimeLimit, int fSkipInv, int fWriteOldFormat, int fVerbose );
......
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