1  /* Control when floating-point expressions are evaluated.  M68k version.
       2     Copyright (C) 2011-2023 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