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1//===-- cpu_model/aarch64.c - Support for __cpu_model builtin ----*- C -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file is based on LLVM's lib/Support/Host.cpp.10// It implements __aarch64_have_lse_atomics, __aarch64_cpu_features for11// AArch64.12//13//===----------------------------------------------------------------------===//14 15#include "aarch64.h"16 17#if !defined(__aarch64__) && !defined(__arm64__) && !defined(_M_ARM64) && \18 !defined(__arm64ec__) && !defined(_M_ARM64EC)19#error This file is intended only for aarch64-based targets20#endif21 22typedef struct __ifunc_arg_t {23 unsigned long _size;24 unsigned long _hwcap;25 unsigned long _hwcap2;26 unsigned long _hwcap3;27 unsigned long _hwcap4;28} __ifunc_arg_t;29 30// LSE support detection for out-of-line atomics31// using HWCAP and Auxiliary vector32_Bool __aarch64_have_lse_atomics33 __attribute__((visibility("hidden"), nocommon)) = false;34 35// The formatter wants to re-order these includes, but doing so is incorrect:36// clang-format off37#if defined(__FreeBSD__) || defined(__OpenBSD__)38#include <sys/auxv.h>39#include "aarch64/hwcap.inc"40#include "aarch64/lse_atomics/elf_aux_info.inc"41#elif defined(__Fuchsia__)42#include "aarch64/hwcap.inc"43#include "aarch64/lse_atomics/fuchsia.inc"44#elif defined(__ANDROID__)45#include <sys/auxv.h>46#include "aarch64/hwcap.inc"47#include "aarch64/lse_atomics/android.inc"48#elif defined(__linux__)49#include <sys/auxv.h>50#include "aarch64/hwcap.inc"51#include "aarch64/lse_atomics/getauxval.inc"52#elif defined(_WIN32)53#include "aarch64/lse_atomics/windows.inc"54#else55// When unimplemented, we leave __aarch64_have_lse_atomics initialized to false.56#endif57// clang-format on58 59#if !defined(DISABLE_AARCH64_FMV)60 61// Architecture features used62// in Function Multi Versioning63struct {64 unsigned long long features;65 // As features grows new fields could be added66} __aarch64_cpu_features __attribute__((visibility("hidden"), nocommon));67 68// The formatter wants to re-order these includes, but doing so is incorrect:69// clang-format off70#if defined(__APPLE__)71#include "aarch64/fmv/apple.inc"72#elif defined(__FreeBSD__) || defined(__OpenBSD__)73#include "aarch64/fmv/hwcap.inc"74#include "aarch64/fmv/elf_aux_info.inc"75#elif defined(__Fuchsia__)76#include "aarch64/fmv/fuchsia.inc"77#elif defined(__ANDROID__)78#include "aarch64/fmv/hwcap.inc"79#include "aarch64/fmv/android.inc"80#elif defined(__linux__)81#include "aarch64/fmv/hwcap.inc"82#include "aarch64/fmv/getauxval.inc"83#elif defined(_WIN32)84#include "aarch64/fmv/windows.inc"85#elif defined(ENABLE_BAREMETAL_AARCH64_FMV)86#include "aarch64/fmv/baremetal.inc"87#else88#include "aarch64/fmv/unimplemented.inc"89#endif90// clang-format on91 92#endif // !defined(DISABLE_AARCH64_FMV)93