hints.h
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1 //
2 // Copyright 2016 Pixar
3 //
4 // Licensed under the Apache License, Version 2.0 (the "Apache License")
5 // with the following modification; you may not use this file except in
6 // compliance with the Apache License and the following modification to it:
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8 //
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19 // distributed under the Apache License with the above modification is
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24 #ifndef PXR_BASE_ARCH_HINTS_H
25 #define PXR_BASE_ARCH_HINTS_H
26 
27 #include "pxr/base/arch/defines.h"
28 
38 
39 #if defined(ARCH_COMPILER_GCC) || defined(ARCH_COMPILER_CLANG)
40 
41 #define ARCH_LIKELY(x) (__builtin_expect((bool)(x), true))
42 #define ARCH_UNLIKELY(x) (__builtin_expect((bool)(x), false))
43 
44 #else
45 
46 #define ARCH_LIKELY(x) (x)
47 #define ARCH_UNLIKELY(x) (x)
48 
49 #endif
50 
51 #endif // PXR_BASE_ARCH_HINTS_H