1 files changed, 84 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/builtins/cpu_model/aarch64.c b/contrib/llvm-project/compiler-rt/lib/builtins/cpu_model/aarch64.c
new file mode 100644
index 000000000000..b868caa991b2
--- /dev/null
+++ b/contrib/llvm-project/compiler-rt/lib/builtins/cpu_model/aarch64.c
@@ -0,0 +1,84 @@
+//===-- cpu_model/aarch64.c - Support for __cpu_model builtin  ----*- C -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file is based on LLVM's lib/Support/Host.cpp.
+//  It implements __aarch64_have_lse_atomics, __aarch64_cpu_features for
+//  AArch64.
+//
+//===----------------------------------------------------------------------===//
+
+#include "aarch64.h"
+
+#if !defined(__aarch64__)
+#error This file is intended only for aarch64-based targets
+#endif
+
+#if __has_include(<sys/ifunc.h>)
+#include <sys/ifunc.h>
+#else
+typedef struct __ifunc_arg_t {
+  unsigned long _size;
+  unsigned long _hwcap;
+  unsigned long _hwcap2;
+} __ifunc_arg_t;
+#endif // __has_include(<sys/ifunc.h>)
+
+// LSE support detection for out-of-line atomics
+// using HWCAP and Auxiliary vector
+_Bool __aarch64_have_lse_atomics
+    __attribute__((visibility("hidden"), nocommon)) = false;
+
+#if defined(__FreeBSD__)
+// clang-format off: should not reorder sys/auxv.h alphabetically
+#include <sys/auxv.h>
+// clang-format on
+#include "aarch64/hwcap.inc"
+#include "aarch64/lse_atomics/freebsd.inc"
+#elif defined(__Fuchsia__)
+#include "aarch64/hwcap.inc"
+#include "aarch64/lse_atomics/fuchsia.inc"
+#elif defined(__ANDROID__)
+#include "aarch64/hwcap.inc"
+#include "aarch64/lse_atomics/android.inc"
+#elif __has_include(<sys/auxv.h>)
+#include "aarch64/hwcap.inc"
+#include "aarch64/lse_atomics/sysauxv.inc"
+#else
+// When unimplemented, we leave __aarch64_have_lse_atomics initialized to false.
+#endif
+
+#if !defined(DISABLE_AARCH64_FMV)
+
+// Architecture features used
+// in Function Multi Versioning
+struct {
+  unsigned long long features;
+  // As features grows new fields could be added
+} __aarch64_cpu_features __attribute__((visibility("hidden"), nocommon));
+
+// The formatter wants to re-order these includes, but doing so is incorrect:
+// clang-format off
+#if defined(__APPLE__)
+#include "aarch64/fmv/apple.inc"
+#elif defined(__FreeBSD__)
+#include "aarch64/fmv/mrs.inc"
+#include "aarch64/fmv/freebsd.inc"
+#elif defined(__Fuchsia__)
+#include "aarch64/fmv/fuchsia.inc"
+#elif defined(__ANDROID__)
+#include "aarch64/fmv/mrs.inc"
+#include "aarch64/fmv/android.inc"
+#elif __has_include(<sys/auxv.h>)
+#include "aarch64/fmv/mrs.inc"
+#include "aarch64/fmv/sysauxv.inc"
+#else
+#include "aarch64/fmv/unimplemented.inc"
+#endif
+// clang-format on
+
+#endif // !defined(DISABLE_AARCH64_FMV)