derek.holloway
7502bf64a4
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95 lines
3.0 KiB
C
95 lines
3.0 KiB
C
//===-- cpu_model/aarch64.c - Support for __cpu_model builtin ----*- C -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is based on LLVM's lib/Support/Host.cpp.
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// It implements __aarch64_have_lse_atomics, __aarch64_cpu_features for
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// AArch64.
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//
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//===----------------------------------------------------------------------===//
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#include "aarch64.h"
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#if !defined(__aarch64__) && !defined(__arm64__) && !defined(_M_ARM64) && \
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!defined(__arm64ec__) && !defined(_M_ARM64EC)
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#error This file is intended only for aarch64-based targets
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#endif
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#if __has_include(<sys/ifunc.h>)
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#include <sys/ifunc.h>
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#else
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typedef struct __ifunc_arg_t {
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unsigned long _size;
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unsigned long _hwcap;
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unsigned long _hwcap2;
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} __ifunc_arg_t;
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#endif // __has_include(<sys/ifunc.h>)
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// LSE support detection for out-of-line atomics
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// using HWCAP and Auxiliary vector
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_Bool __aarch64_have_lse_atomics
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__attribute__((visibility("hidden"), nocommon)) = false;
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// The formatter wants to re-order these includes, but doing so is incorrect:
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// clang-format off
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#if defined(__FreeBSD__) || defined(__OpenBSD__)
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#include <sys/auxv.h>
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#include "aarch64/hwcap.inc"
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#include "aarch64/lse_atomics/elf_aux_info.inc"
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#elif defined(__Fuchsia__)
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#include "aarch64/hwcap.inc"
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#include "aarch64/lse_atomics/fuchsia.inc"
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#elif defined(__ANDROID__)
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#include <sys/auxv.h>
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#include "aarch64/hwcap.inc"
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#include "aarch64/lse_atomics/android.inc"
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#elif defined(__linux__)
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#include <sys/auxv.h>
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#include "aarch64/hwcap.inc"
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#include "aarch64/lse_atomics/getauxval.inc"
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#elif defined(_WIN32)
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#include "aarch64/lse_atomics/windows.inc"
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#else
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// When unimplemented, we leave __aarch64_have_lse_atomics initialized to false.
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#endif
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// clang-format on
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#if !defined(DISABLE_AARCH64_FMV)
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// Architecture features used
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// in Function Multi Versioning
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struct {
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unsigned long long features;
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// As features grows new fields could be added
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} __aarch64_cpu_features __attribute__((visibility("hidden"), nocommon));
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// The formatter wants to re-order these includes, but doing so is incorrect:
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// clang-format off
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#if defined(TARGET_BAREMETAL_AARCH64)
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#include "aarch64/fmv/baremetal.inc"
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#elif defined(__APPLE__)
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#include "aarch64/fmv/apple.inc"
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#elif defined(__FreeBSD__) || defined(__OpenBSD__)
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#include "aarch64/fmv/hwcap.inc"
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#include "aarch64/fmv/elf_aux_info.inc"
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#elif defined(__Fuchsia__)
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#include "aarch64/fmv/fuchsia.inc"
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#elif defined(__ANDROID__)
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#include "aarch64/fmv/hwcap.inc"
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#include "aarch64/fmv/android.inc"
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#elif defined(__linux__)
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#include "aarch64/fmv/hwcap.inc"
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#include "aarch64/fmv/getauxval.inc"
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#elif defined(_WIN32)
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#include "aarch64/fmv/windows.inc"
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#else
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#include "aarch64/fmv/unimplemented.inc"
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#endif
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// clang-format on
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#endif // !defined(DISABLE_AARCH64_FMV)
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