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