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/*-
* Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <math.h>
#include <sys/cdefs.h>
#include "src/fpmath.h"
/*
* XXX These routines belong in libm, but they must remain in libc for
* binary compat until we can bump libm's major version number.
*/
int
__isinf(double d)
{
union IEEEd2bits u;
u.d = d;
return (u.bits.exp == 2047 && u.bits.manl == 0 && u.bits.manh == 0);
}
int
__isinff(float f)
{
union IEEEf2bits u;
u.f = f;
return (u.bits.exp == 255 && u.bits.man == 0);
}
int
__isinfl(long double e)
{
union IEEEl2bits u;
u.e = e;
mask_nbit_l(u);
#ifndef __alpha__
return (u.bits.exp == 32767 && u.bits.manl == 0 && u.bits.manh == 0);
#else
return (u.bits.exp == 2047 && u.bits.manl == 0 && u.bits.manh == 0);
#endif
}
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