sysdeps/ia64/fpu/bits/mathinline.h

   1 /* Inline math functions for ia64.
   2    Copyright (C) 2004, 2007 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   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.
   9
  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.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifndef _MATH_H
  21 # error "Never use <bits/mathinline.h> directly; include <math.h> instead."
  22 #endif
  23
  24 #ifndef __extern_inline
  25 # define __MATH_INLINE __inline
  26 #else
  27 # define __MATH_INLINE __extern_inline
  28 #endif
  29
  30 #if defined __USE_ISOC99 && defined __GNUC__ && __GNUC__ >= 2
  31 /* The gcc, version 2.7 or below, has problems with all this inlining
  32    code.  So disable it for this version of the compiler.  */
  33 # if __GNUC_PREREQ (2, 8)
  34 /* Test for negative number.  Used in the signbit() macro.  */
  35 __MATH_INLINE int
  36 __NTH (__signbitf (float __x))
  37 {
  38   __extension__ union { float __f; int __i; } __u = { __f: __x };
  39   return __u.__i < 0;
  40 }
  41 __MATH_INLINE int
  42 __NTH (__signbit (double __x))
  43 {
  44   __extension__ union { double __d; int __i[2]; } __u = { __d: __x };
  45   return __u.__i[1] < 0;
  46 }
  47 __MATH_INLINE int
  48 __NTH (__signbitl (long double __x))
  49 {
  50   __extension__ union { long double __l; int __i[3]; } __u = { __l: __x };
  51   return (__u.__i[2] & 0x8000) != 0;
  52 }
  53 # endif
  54 #endif