rte_branch_prediction.h File Reference

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Macros
#define	likely(x)   __builtin_expect((x),1)
#define	unlikely(x)   __builtin_expect((x),0)

Detailed Description

Branch Prediction Helpers in RTE

Definition in file rte_branch_prediction.h.

Macro Definition Documentation

#define likely

(

x

)

__builtin_expect((x),1)

Check if a branch is likely to be taken.

This compiler builtin allows the developer to indicate if a branch is likely to be taken. Example:

if (likely(x > 1)) do_stuff();

Definition at line 53 of file rte_branch_prediction.h.

#define unlikely

(

x

)

__builtin_expect((x),0)

Check if a branch is unlikely to be taken.

This compiler builtin allows the developer to indicate if a branch is unlikely to be taken. Example:

if (unlikely(x < 1)) do_stuff();

Definition at line 67 of file rte_branch_prediction.h.