Bumping gaia.json for 1 gaia revision(s) a=gaia-bump
[gecko.git] / mfbt / Likely.h
blob4f21609295447f4668e3b45d1f84e72185261f93
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
7 /*
8 * MOZ_LIKELY and MOZ_UNLIKELY macros to hint to the compiler how a
9 * boolean predicate should be branch-predicted.
12 #ifndef mozilla_Likely_h
13 #define mozilla_Likely_h
15 #if defined(__clang__) || defined(__GNUC__)
16 # define MOZ_LIKELY(x) (__builtin_expect(!!(x), 1))
17 # define MOZ_UNLIKELY(x) (__builtin_expect(!!(x), 0))
18 #else
19 # define MOZ_LIKELY(x) (!!(x))
20 # define MOZ_UNLIKELY(x) (!!(x))
21 #endif
23 #endif /* mozilla_Likely_h */