diff options
Diffstat (limited to 'sysdeps/ieee754/isinf.c')
-rw-r--r-- | sysdeps/ieee754/isinf.c | 40 |
1 files changed, 0 insertions, 40 deletions
diff --git a/sysdeps/ieee754/isinf.c b/sysdeps/ieee754/isinf.c deleted file mode 100644 index 79be916..0000000 --- a/sysdeps/ieee754/isinf.c +++ /dev/null @@ -1,40 +0,0 @@ -/* Copyright (C) 1991, 1992, 1995 Free Software Foundation, Inc. -This file is part of the GNU C Library. - -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., 675 Mass Ave, -Cambridge, MA 02139, USA. */ - -#include <ansidecl.h> -#include <math.h> -#include "ieee754.h" - -/* Return 0 if VALUE is finite or NaN, +1 if it - is +Infinity, -1 if it is -Infinity. */ -int -DEFUN(__isinf, (value), double value) -{ - union ieee754_double u; - - u.d = value; - /* An IEEE 754 infinity has an exponent with the - maximum possible value and a zero mantissa. */ - if ((u.ieee.exponent & 0x7ff) == 0x7ff && - u.ieee.mantissa0 == 0 && u.ieee.mantissa1 == 0) - return u.ieee.negative ? -1 : 1; - - return 0; -} - -weak_alias (__isinf, isinf) |