sysdeps/powerpc/fpu/math-barriers.h

   1 /* Control when floating-point expressions are evaluated.  PowerPC version.
   2    Copyright (C) 2017-2018 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 POWERPC_MATH_BARRIERS_H
  20 #define POWERPC_MATH_BARRIERS_H 1
  21
  22 /* Avoid putting floating point values in memory.  */
  23 # define math_opt_barrier(x)                                    \
  24   ({ __typeof (x) __x = (x); __asm ("" : "+dwa" (__x)); __x; })
  25 # define math_force_eval(x)                                             \
  26   ({ __typeof (x) __x = (x); __asm __volatile__ ("" : : "dwa" (__x)); })
  27
  28 #endif