sysdeps/aarch64/fpu/math-barriers.h

   1 /* Control when floating-point expressions are evaluated.  AArch64 version.
   2    Copyright (C) 2014-2021 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    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifndef AARCH64_MATH_BARRIERS_H
  20 #define AARCH64_MATH_BARRIERS_H 1
  21
  22 #define math_opt_barrier(x)                                     \
  23   ({ __typeof (x) __x = (x); __asm ("" : "+w" (__x)); __x; })
  24 #define math_force_eval(x)                                              \
  25   ({ __typeof (x) __x = (x); __asm __volatile__ ("" : : "w" (__x)); })
  26
  27 #endif