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arch/ppc/common/compiler_extensions.h

 

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/*

 

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 * ---------------------------------------------------

 

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 * Use compiler builtins for better compilation

 

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 * results. Taken from the linux kernel source

 

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 * ---------------------------------------------------

 

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 */

 

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#ifndef COMPILER_EXTENSIONS_H

 

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#define COMPILER_EXTENSIONS_H

 

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#if __GNUC__ > 2

 

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#define likely(x)       __builtin_expect(!!(x), 1)

 

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#define unlikely(x)     __builtin_expect(!!(x), 0)

 

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#else

 

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#define likely(x)       x 

 

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#define unlikely(x)     x 

 

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#endif

 

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#ifdef __GNUC__

 

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#define UNUSED __attribute__((unused))

 

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#else

 

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#define UNUSED

 

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#endif

 

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#endif

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