2012-02-29 18:40:47 -08:00
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* MOZ_LIKELY and MOZ_UNLIKELY macros to hint to the compiler how a
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* boolean predicate should be branch-predicted.
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*/
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2012-03-05 10:09:05 -08:00
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#ifndef Likely_h_
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#define Likely_h_
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2012-02-29 18:40:47 -08:00
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#if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 2))
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# define MOZ_LIKELY(x) (__builtin_expect((x), 1))
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# define MOZ_UNLIKELY(x) (__builtin_expect((x), 0))
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#else
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# define MOZ_LIKELY(x) (x)
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# define MOZ_UNLIKELY(x) (x)
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#endif
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2012-03-05 10:09:05 -08:00
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#endif /* Likely_h_ */
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