/home/jaouen/pok_official/pok/trunk/libpok/libm/isinf.c

/*
 *                               POK header
 * 
 * The following file is a part of the POK project. Any modification should
 * made according to the POK licence. You CANNOT use this file or a part of
 * this file is this part of a file for your own project
 *
 * For more information on the POK licence, please see our LICENCE FILE
 *
 * Please follow the coding guidelines described in doc/CODING_GUIDELINES
 *
 *                                      Copyright (c) 2007-2009 POK team 
 *
 * Created by julien on Fri Jan 30 14:41:34 2009 
 */

/*
 * Written by J.T. Conklin <jtc@NetBSD.org>.
 * Public domain.
 */

#ifdef POK_NEEDS_LIBMATH

/*
 * isinf(x) returns 1 is x is inf, else 0;
 * no branching!
 */

#include <libm.h>
#include "math_private.h"

int
isinf(double x)
{
        int32_t hx,lx;
        EXTRACT_WORDS(hx,lx,x);
        hx &= 0x7fffffff;
        hx ^= 0x7ff00000;
        hx |= lx;
        return (hx == 0);
}

#endif