1 /* Inline math functions for ia64.
2 Copyright (C) 2004 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
20 # error "Never use <bits/mathinline.h> directly; include <math.h> instead."
24 # define __MATH_INLINE __inline
26 # define __MATH_INLINE extern __inline
29 #if defined __USE_ISOC99 && defined __GNUC__ && __GNUC__ >= 2
30 /* The gcc, version 2.7 or below, has problems with all this inlining
31 code. So disable it for this version of the compiler. */
32 # if __GNUC_PREREQ (2, 8)
33 /* Test for negative number. Used in the signbit() macro. */
35 __NTH (__signbitf (float __x))
37 __extension__ union { float __f; int __i; } __u = { __f: __x };
41 __NTH (__signbit (double __x))
43 __extension__ union { double __d; int __i[2]; } __u = { __d: __x };
44 return __u.__i[1] < 0;
47 __NTH (__signbitl (long double __x))
49 __extension__ union { long double __l; int __i[3]; } __u = { __l: __x };
50 return (__u.__i[2] & 0x8000) != 0;