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Since g++ 2.95.x on our solaris server doesn't have macros to check

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for infinity and NaN these checks have been removed from the source code
and a protected divided function node is now used.
This commit is contained in:
jeggermo 2001-10-05 09:32:49 +00:00
commit 8f1af522a6
2 changed files with 9 additions and 32 deletions
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35
eo/app/gpsymreg/fitness.h
View file

@ -77,9 +77,13 @@ double _multiplies(double arg1, double arg2)
return arg1 * arg2;
}
// the function for a protected divide looks a little bit different
double _divides(double arg1, double arg2)
{
return arg1 / arg2;
if (arg2 ==0)
return 0;
else
return arg1 / arg2;
}
double _negate(double arg1)
@ -103,12 +107,8 @@ void init(vector<TreeNode> &initSequence)
Operation OpPLUS ( _plus, string("+"));
Operation OpMINUS( _minus,string("-"));
Operation OpMULTIPLIES(_multiplies,string("*"));
// We can use the normal divide function because there is a check for finite numbers in the node class
// so PDIV (protected divided) is enforced there so: (x/0 -> nan -> 0)
// We can use a protected divide function.
Operation OpDIVIDE( _divides, string("/") );
// we can also use the standard 'pow' function from cmath or math because of the check for nan is
// in the node class so: (-3^3.1) -> nan -> 0)
Operation OpPOW( pow, string("^") );
// Now the functions as binary functions
@ -116,23 +116,15 @@ void init(vector<TreeNode> &initSequence)
Operation MINUS( string("minus"), _minus);
Operation MULTIPLIES( string("multiply"), _multiplies);
Operation DIVIDE( string("divide"), _divides);
Operation POW(string("pow"), pow);
// and some unary functions
Operation NEGATE( _negate,string("-"));
Operation SIN ( sin, string("sin"));
Operation COS ( cos, string("cos"));
// all functions are "protected" inside the Node class so can also use tan(x)
// resulting values of -inf, inf or NaN (not-a-number) are converted to 0
Operation TAN ( tan, string("tan"));
Operation EXP ( exp, string("e^"));
Operation LOG ( log, string("ln"));
// Now we are ready to add the possible nodes to our initSequence (which is used by the eoDepthInitializer)
// always add the leaves (nodes with arity 0) first (or the program will crash)
// so lets start with our variable
initSequence.push_back(varX);
@ -152,16 +144,12 @@ void init(vector<TreeNode> &initSequence)
initSequence.push_back( NEGATE );
initSequence.push_back( SIN );
initSequence.push_back( COS );
initSequence.push_back( TAN );
initSequence.push_back( EXP );
initSequence.push_back( LOG );
// and the binary functions
initSequence.push_back( PLUS);
initSequence.push_back( MINUS );
initSequence.push_back( MULTIPLIES );
initSequence.push_back( DIVIDE );
initSequence.push_back( POW );
// and the binary operators
initSequence.push_back( OpPLUS);
@ -170,8 +158,6 @@ void init(vector<TreeNode> &initSequence)
initSequence.push_back( OpMULTIPLIES );
initSequence.push_back( OpDIVIDE );
initSequence.push_back( OpPOW );
};
@ -202,11 +188,8 @@ class RegFitness: public eoEvalFunc< eoParseTree<FType, TreeNode> >
fit += pow(target - output, 2);
}
// some versions of gcc (e.g. 2.95.2 on solaris) don't have isinf(x) defined
if (isinf(fit) == 0)
fitness[NORMAL] = fit;
else
fitness[NORMAL] = MAXFLOAT;
fitness[NORMAL] = fit;
fitness[SMALLESTSIZE] = _eo.size() / (1.0*parameter.MaxSize);
_eo.fitness(fitness);

6
eo/app/gpsymreg/node.h
View file

@ -160,12 +160,6 @@ class Node
}
// if the result is infinite (positive or negative) or not_a_number (nan) then result becomes 0
// however some versions of gcc (e.g. 2.95.2 on solaris) don't have the finite(x) defined
#ifdef finite
if (!finite(result))
result=0;
#endif
}
template<class Children>