michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim: set ts=8 sts=2 et sw=2 tw=80: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /*
michael@0:  * MOZ_LIKELY and MOZ_UNLIKELY macros to hint to the compiler how a
michael@0:  * boolean predicate should be branch-predicted.
michael@0:  */
michael@0: 
michael@0: #ifndef mozilla_Likely_h
michael@0: #define mozilla_Likely_h
michael@0: 
michael@0: #if defined(__clang__) || defined(__GNUC__)
michael@0: #  define MOZ_LIKELY(x)   (__builtin_expect(!!(x), 1))
michael@0: #  define MOZ_UNLIKELY(x) (__builtin_expect(!!(x), 0))
michael@0: #else
michael@0: #  define MOZ_LIKELY(x)   (!!(x))
michael@0: #  define MOZ_UNLIKELY(x) (!!(x))
michael@0: #endif
michael@0: 
michael@0: #endif /* mozilla_Likely_h */