glibc/sysdeps/i386/fpu/s_fpclassifyl.c
Andreas Jaeger 41bdb6e20c Update to LGPL v2.1.
2001-07-06  Paul Eggert  <eggert@twinsun.com>

	* manual/argp.texi: Remove ignored LGPL copyright notice; it's
	not appropriate for documentation anyway.
	* manual/libc-texinfo.sh: "Library General Public License" ->
	"Lesser General Public License".

2001-07-06  Andreas Jaeger  <aj@suse.de>

	* All files under GPL/LGPL version 2: Place under LGPL version
	2.1.
2001-07-06 04:58:11 +00:00

43 lines
1.4 KiB
C

/* Return classification value corresponding to argument.
Copyright (C) 1997, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <math.h>
#include "math_private.h"
int
__fpclassifyl (long double x)
{
u_int32_t ex, hx, lx;
int retval = FP_NORMAL;
GET_LDOUBLE_WORDS (ex, hx, lx, x);
ex &= 0x7fff;
if ((ex | lx | hx) == 0)
retval = FP_ZERO;
else if (ex == 0 && (hx & 0x80000000) == 0)
retval = FP_SUBNORMAL;
else if (ex == 0x7fff)
retval = ((hx & 0x7fffffff) | lx) != 0 ? FP_NAN : FP_INFINITE;
return retval;
}