1 /* Control when floating-point expressions are evaluated. M68k version. 2 Copyright (C) 2011-2021 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 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 38