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42 lines
846 B
C
42 lines
846 B
C
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/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2014 Intel Corporation
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*/
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/**
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* @file
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* Branch Prediction Helpers in RTE
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*/
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#ifndef _RTE_BRANCH_PREDICTION_H_
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#define _RTE_BRANCH_PREDICTION_H_
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/**
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* Check if a branch is likely to be taken.
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*
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* This compiler builtin allows the developer to indicate if a branch is
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* likely to be taken. Example:
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*
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* if (likely(x > 1))
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* do_stuff();
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*
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*/
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#ifndef likely
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#define likely(x) __builtin_expect(!!(x), 1)
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#endif /* likely */
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/**
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* Check if a branch is unlikely to be taken.
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*
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* This compiler builtin allows the developer to indicate if a branch is
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* unlikely to be taken. Example:
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*
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* if (unlikely(x < 1))
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* do_stuff();
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*
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*/
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#ifndef unlikely
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#define unlikely(x) __builtin_expect(!!(x), 0)
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#endif /* unlikely */
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#endif /* _RTE_BRANCH_PREDICTION_H_ */
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