as_arch.h

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/*
 * Copyright 2023 Aerospike, Inc.
 *
 * Portions may be licensed to Aerospike, Inc. under one or more contributor
 * license agreements.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
 
#pragma once
 
#if defined _MSC_VER
 
#define as_arch_prefetch_nt(_p)
#define as_arch_pause() YieldProcessor()
 
#else // gcc & clang
 
#define as_arch_compiler_barrier() asm volatile ("" : : : "memory")
 
#define as_arch_prefetch_nt(_p) __builtin_prefetch((_p), 0, 0)
 
#if defined __x86_64__
 
#define as_arch_pause() asm volatile("pause" : : : "memory")
 
#elif defined __aarch64__
 
#define as_arch_pause() asm volatile("isb" : : : "memory")
 
#endif
 
#endif // gcc & clang