sysdeps/s390/fpu/bits/mathinline.h

   1 /* Inline math functions for s390.
   2    Copyright (C) 2004-2017 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _MATH_H
  20 # error "Never use <bits/mathinline.h> directly; include <math.h> instead."
  21 #endif
  22
  23 #ifndef __extern_inline
  24 # define __MATH_INLINE __inline
  25 #else
  26 # define __MATH_INLINE __extern_inline
  27 #endif
  28
  29 #if (!defined __NO_MATH_INLINES || defined __LIBC_INTERNAL_MATH_INLINES) \
  30     && defined __OPTIMIZE__
  31
  32 /* This code is used internally in the GNU libc.  */
  33 #ifdef __LIBC_INTERNAL_MATH_INLINES
  34
  35 __MATH_INLINE double
  36 __NTH (__ieee754_sqrt (double x))
  37 {
  38   double res;
  39
  40   __asm__ ( "sqdbr %0,%1" : "=f" (res) : "f" (x) );
  41   return res;
  42 }
  43
  44 __MATH_INLINE float
  45 __NTH (__ieee754_sqrtf (float x))
  46 {
  47   float res;
  48
  49   __asm__ ( "sqebr %0,%1" : "=f" (res) : "f" (x) );
  50   return res;
  51 }
  52
  53 # if !defined __NO_LONG_DOUBLE_MATH
  54 __MATH_INLINE long double
  55 __NTH (sqrtl (long double __x))
  56 {
  57   long double res;
  58
  59   __asm__ ( "sqxbr %0,%1" : "=f" (res) : "f" (__x) );
  60   return res;
  61 }
  62 # endif /* !__NO_LONG_DOUBLE_MATH */
  63
  64 #endif /* __LIBC_INTERNAL_MATH_INLINES */
  65
  66 #endif /* __NO_MATH_INLINES */