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An improvement to 'twoexact' and 'lutexact'.

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This commit is contained in:
Alan Mishchenko
2017-12-06 13:00:08 -08:00
parent 9e515ae363
commit e37bbba72d
4 changed files with 39 additions and 3 deletions
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src/base/abci/abc.c
+27
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@@ -8229,6 +8229,16 @@ int Abc_CommandTwoExact( Abc_Frame_t * pAbc, int argc, char ** argv )
Abc_Print( -1, "Truth table should be given on the command line.\n" );
return 1;
}
if ( (1 << (nVars-2)) != (int)strlen(pTtStr) )
{
Abc_Print( -1, "Truth table is expected to have %d hex digits (instead of %d).\n", (1 << (nVars-2)), strlen(pTtStr) );
return 1;
}
if ( nVars > nNodes * (2 - 1) + 1 )
{
Abc_Print( -1, "Function with %d variales cannot be implemented with %d two-input gates.\n", nVars, nNodes );
return 1;
}
if ( nVars > 10 )
{
Abc_Print( -1, "Function should not have more than 10 inputs.\n" );
@@ -8250,6 +8260,13 @@ usage:
Abc_Print( -2, "\t-v : toggle verbose printout [default = %s]\n", fVerbose ? "yes" : "no" );
Abc_Print( -2, "\t-h : print the command usage\n" );
Abc_Print( -2, "\t<hex> : truth table in hex notation\n" );
Abc_Print( -2, "\t \n" );
Abc_Print( -2, "\t For example, command line \"twoexact -g -I 5 -N 12 169AE443\"\n" );
Abc_Print( -2, "\t synthesizes the smallest circuit composed of two-input gates\n" );
Abc_Print( -2, "\t for the only NPN class of 5-input functions that requires 12 gates;\n" );
Abc_Print( -2, "\t all other functions can be realized with 11 two-input gates or less\n" );
Abc_Print( -2, "\t (see Section 7.1.2 \"Boolean evaluation\" in the book by Donald Knuth\n" );
Abc_Print( -2, "\t http://www.cs.utsa.edu/~wagner/knuth/fasc0c.pdf)\n" );
return 1;
}
@@ -8329,6 +8346,16 @@ int Abc_CommandLutExact( Abc_Frame_t * pAbc, int argc, char ** argv )
Abc_Print( -1, "Truth table should be given on the command line.\n" );
return 1;
}
if ( (1 << (nVars-2)) != (int)strlen(pTtStr) )
{
Abc_Print( -1, "Truth table is expected to have %d hex digits (instead of %d).\n", (1 << (nVars-2)), strlen(pTtStr) );
return 1;
}
if ( nVars > nNodes * (nLutSize - 1) + 1 )
{
Abc_Print( -1, "Function with %d variales cannot be implemented with %d %d-input LUTs.\n", nVars, nNodes, nLutSize );
return 1;
}
if ( nVars > 10 )
{
Abc_Print( -1, "Function should not have more than 10 inputs.\n" );