mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-21 11:13:30 +00:00
94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
/*-
|
|
* Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
|
|
* Copyright (c) 2002, 2003 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 <sys/endian.h>
|
|
|
|
#include <math.h>
|
|
#include <stdint.h>
|
|
|
|
#include "fpmath.h"
|
|
|
|
int
|
|
__fpclassifyf(float f)
|
|
{
|
|
union IEEEf2bits u;
|
|
|
|
u.f = f;
|
|
if (u.bits.exp == 0) {
|
|
if (u.bits.man == 0)
|
|
return (FP_ZERO);
|
|
return (FP_SUBNORMAL);
|
|
}
|
|
if (u.bits.exp == 255) {
|
|
if (u.bits.man == 0)
|
|
return (FP_INFINITE);
|
|
return (FP_NAN);
|
|
}
|
|
return (FP_NORMAL);
|
|
}
|
|
|
|
int
|
|
__fpclassifyd(double d)
|
|
{
|
|
union IEEEd2bits u;
|
|
|
|
u.d = d;
|
|
if (u.bits.exp == 0) {
|
|
if ((u.bits.manl | u.bits.manh) == 0)
|
|
return (FP_ZERO);
|
|
return (FP_SUBNORMAL);
|
|
}
|
|
if (u.bits.exp == 2047) {
|
|
if ((u.bits.manl | u.bits.manh) == 0)
|
|
return (FP_INFINITE);
|
|
return (FP_NAN);
|
|
}
|
|
return (FP_NORMAL);
|
|
}
|
|
|
|
int
|
|
__fpclassifyl(long double e)
|
|
{
|
|
union IEEEl2bits u;
|
|
|
|
u.e = e;
|
|
if (u.bits.exp == 0) {
|
|
if ((u.bits.manl | u.bits.manh) == 0)
|
|
return (FP_ZERO);
|
|
return (FP_SUBNORMAL);
|
|
}
|
|
mask_nbit_l(u); /* Mask normalization bit if applicable. */
|
|
if (u.bits.exp == 32767) {
|
|
if ((u.bits.manl | u.bits.manh) == 0)
|
|
return (FP_INFINITE);
|
|
return (FP_NAN);
|
|
}
|
|
return (FP_NORMAL);
|
|
}
|