sysdeps/alpha/fpu/math-barriers.h

   1 /* Control when floating-point expressions are evaluated.  Alpha version.
   2    Copyright (C) 2014-2024 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 ALPHA_MATH_BARRIERS_H
  20 #define ALPHA_MATH_BARRIERS_H 1
  21
  22 /* Generic code forces values to memory; we don't need to do that.  */
  23 #define math_opt_barrier(x) \
  24   ({ __typeof (x) __x = (x); __asm ("" : "+frm" (__x)); __x; })
  25 #define math_force_eval(x) \
  26   ({ __typeof (x) __x = (x); __asm __volatile__ ("" : : "frm" (__x)); })
  27
  28 #endif