Support for IEEE754

JOLY Loic loic.joly@renault.com
Thu Apr 15 17:29:00 GMT 2004


Hello,

I recently tried the following code (platform : PC/Linux, gcc version 3.2) :

#include <limits>
#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
	cout << "is IEEE754   = " << numeric_limits<double>::is_iec559<<endl;
	cout << "has infinity = " << numeric_limits<double>::has_infinity<<endl;

	cout << "infinity > 100 ? " << (numeric_limits<double>::infinity() 
 >100) <<endl;
	cout << "infinity= " <<numeric_limits<double>::infinity()<<endl;
	
	return 1;
}

It shows that gcc does not handle the IEEE 754 standard on this 
platform, even if support for this standard is available on this 
processor (The same program run on win/mscv on the same computer shows 
handling for IEEE754).

Is there any compiler flag, or anything, to make gcc compatible with 
this standard? Is there any (good) reason why gcc is not and will never 
be compliant?

Best regards,

-- 
Loïc



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