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- /* Control when floating-point expressions are evaluated. x86 version.
- Copyright (C) 2007-2019 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
- #ifndef X86_MATH_BARRIERS_H
- #define X86_MATH_BARRIERS_H 1
- #ifdef __SSE2_MATH__
- # define math_opt_barrier(x) \
- ({ __typeof(x) __x; \
- if (sizeof (x) <= sizeof (double) \
- || __builtin_types_compatible_p (__typeof (x), _Float128)) \
- __asm ("" : "=x" (__x) : "0" (x)); \
- else \
- __asm ("" : "=t" (__x) : "0" (x)); \
- __x; })
- # define math_force_eval(x) \
- do { \
- if (sizeof (x) <= sizeof (double) \
- || __builtin_types_compatible_p (__typeof (x), _Float128)) \
- __asm __volatile ("" : : "x" (x)); \
- else \
- __asm __volatile ("" : : "f" (x)); \
- } while (0)
- #else
- # define math_opt_barrier(x) \
- ({ __typeof (x) __x; \
- if (__builtin_types_compatible_p (__typeof (x), _Float128)) \
- { \
- __x = (x); \
- __asm ("" : "+m" (__x)); \
- } \
- else \
- __asm ("" : "=t" (__x) : "0" (x)); \
- __x; })
- # define math_force_eval(x) \
- do { \
- __typeof (x) __x = (x); \
- if (sizeof (x) <= sizeof (double) \
- || __builtin_types_compatible_p (__typeof (x), _Float128)) \
- __asm __volatile ("" : : "m" (__x)); \
- else \
- __asm __volatile ("" : : "f" (__x)); \
- } while (0)
- #endif
- #endif
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