[ceph.git] / ceph / src / rocksdb / third-party / folly / folly / portability / Asm.h

//  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
//  This source code is licensed under both the GPLv2 (found in the
//  COPYING file in the root directory) and Apache 2.0 License
//  (found in the LICENSE.Apache file in the root directory).

#pragma once

#include <folly/Portability.h>

#include <cstdint>

#ifdef _MSC_VER
#include <intrin.h>
#endif

namespace folly {
inline void asm_volatile_pause() {
#if defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
  ::_mm_pause();
#elif defined(__i386__) || FOLLY_X64
  asm volatile("pause");
#elif FOLLY_AARCH64 || defined(__arm__)
  asm volatile("yield");
#elif FOLLY_PPC64
  asm volatile("or 27,27,27");
#endif
}
} // namespace folly
Commit	Line	Data
f67539c2 TL	1	// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
	2	// This source code is licensed under both the GPLv2 (found in the
	3	// COPYING file in the root directory) and Apache 2.0 License
	4	// (found in the LICENSE.Apache file in the root directory).
	5
	6	#pragma once
	7
	8	#include <folly/Portability.h>
	9
	10	#include <cstdint>
	11
	12	#ifdef _MSC_VER
	13	#include <intrin.h>
	14	#endif
	15
	16	namespace folly {
	17	inline void asm_volatile_pause() {
	18	#if defined(_MSC_VER) && (defined(_M_IX86) \|\| defined(_M_X64))
	19	::_mm_pause();
	20	#elif defined(__i386__) \|\| FOLLY_X64
	21	asm volatile("pause");
	22	#elif FOLLY_AARCH64 \|\| defined(__arm__)
	23	asm volatile("yield");
	24	#elif FOLLY_PPC64
	25	asm volatile("or 27,27,27");
	26	#endif
	27	}
	28	} // namespace folly