/usr/include/dpdk/rte_branch_prediction.h is in libdpdk-dev 2.2.0-0ubuntu7.
This file is owned by root:root, with mode 0o644.
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* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* @file
* Branch Prediction Helpers in RTE
*/
#ifndef _RTE_BRANCH_PREDICTION_H_
#define _RTE_BRANCH_PREDICTION_H_
/**
* 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();
*
*/
#ifndef likely
#define likely(x) __builtin_expect((x),1)
#endif /* likely */
/**
* 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();
*
*/
#ifndef unlikely
#define unlikely(x) __builtin_expect((x),0)
#endif /* unlikely */
#endif /* _RTE_BRANCH_PREDICTION_H_ */
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