sysdeps/m68k/m680x0/fpu/math-barriers.h

   1 /* Control when floating-point expressions are evaluated.  M68k version.
   2    Copyright (C) 2011-2022 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 M68K_MATH_BARRIERS_H
  20 #define M68K_MATH_BARRIERS_H 1
  21
  22 #define math_opt_barrier(x) \
  23 ({ __typeof (x) __x;                                    \
  24    __asm ("" : "=f" (__x) : "0" (x));                   \
  25    __x; })
  26 #define math_force_eval(x) \
  27 do                                                      \
  28   {                                                     \
  29     __typeof (x) __x = (x);                             \
  30     if (sizeof (x) <= sizeof (double))                  \
  31       __asm __volatile ("" : : "m" (__x));              \
  32     else                                                \
  33       __asm __volatile ("" : : "f" (__x));              \
  34   }                                                     \
  35 while (0)
  36
  37 #endif