branch.h File Reference

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Macros
#define	PRISM_LIKELY(x)   __builtin_expect(!!(x), 1)
	Branch prediction hints.
#define	PRISM_UNLIKELY(x)   __builtin_expect(!!(x), 0)
	The compiler should predicate that this branch will not be taken.

Macro Definition Documentation

PRISM_LIKELY

#define PRISM_LIKELY

(

x

)

__builtin_expect(!!(x), 1)

Branch prediction hints.

These tell the compiler which side of a branch to predicate the fast path through, so it can lay out instructions to favour that side and steer the static branch predictor. The compiler should predicate that this branch will be taken.

Definition at line 14 of file branch.h.

PRISM_UNLIKELY

#define PRISM_UNLIKELY

(

x

)

__builtin_expect(!!(x), 0)

The compiler should predicate that this branch will not be taken.

Definition at line 17 of file branch.h.