1 /* Control when floating-point expressions are evaluated. Alpha version. 2 Copyright (C) 2014-2021 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 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 29