43 lines
1.4 KiB
C
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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. 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;
|
|
}
|