mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-27 03:41:23 +08:00
45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
/* Return classification value corresponding to argument.
|
|
Copyright (C) 1997-2013 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997 and
|
|
Jakub Jelinek <jj@ultra.linux.cz>, 1999.
|
|
|
|
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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <math.h>
|
|
|
|
#include <math_private.h>
|
|
|
|
|
|
int
|
|
__fpclassifyl (long double x)
|
|
{
|
|
u_int64_t hx, lx;
|
|
int retval = FP_NORMAL;
|
|
|
|
GET_LDOUBLE_WORDS64 (hx, lx, x);
|
|
lx |= (hx & 0x0000ffffffffffffLL);
|
|
hx &= 0x7fff000000000000LL;
|
|
if ((hx | lx) == 0)
|
|
retval = FP_ZERO;
|
|
else if (hx == 0)
|
|
retval = FP_SUBNORMAL;
|
|
else if (hx == 0x7fff000000000000LL)
|
|
retval = lx != 0 ? FP_NAN : FP_INFINITE;
|
|
|
|
return retval;
|
|
}
|
|
libm_hidden_def (__fpclassifyl)
|