1 files changed, 51 insertions, 0 deletions
diff --git a/contrib/llvm-project/clang/lib/Headers/usermsrintrin.h b/contrib/llvm-project/clang/lib/Headers/usermsrintrin.h
new file mode 100644
index 000000000000..61388376706d
--- /dev/null
+++ b/contrib/llvm-project/clang/lib/Headers/usermsrintrin.h
@@ -0,0 +1,51 @@
+/*===--------------- usermsrintrin.h - USERMSR intrinsics -----------------===
+ *
+ * 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
+ *
+ *===-----------------------------------------------------------------------===
+ */
+#ifndef __X86GPRINTRIN_H
+#error "Never use <usermsrintrin.h> directly; include <x86gprintrin.h> instead."
+#endif // __X86GPRINTRIN_H
+
+#ifndef __USERMSRINTRIN_H
+#define __USERMSRINTRIN_H
+#ifdef __x86_64__
+
+/// Reads the contents of a 64-bit MSR specified in \a __A into \a dst.
+///
+/// This intrinsic corresponds to the <c> URDMSR </c> instruction.
+/// \param __A
+///    An unsigned long long.
+///
+/// \code{.operation}
+///    DEST := MSR[__A]
+/// \endcode
+static __inline__ unsigned long long
+    __attribute__((__always_inline__, __nodebug__, __target__("usermsr")))
+    _urdmsr(unsigned long long __A) {
+  return __builtin_ia32_urdmsr(__A);
+}
+
+/// Writes the contents of \a __B into the 64-bit MSR specified in \a __A.
+///
+/// This intrinsic corresponds to the <c> UWRMSR </c> instruction.
+///
+/// \param __A
+///    An unsigned long long.
+/// \param __B
+///    An unsigned long long.
+///
+/// \code{.operation}
+///    MSR[__A] := __B
+/// \endcode
+static __inline__ void
+    __attribute__((__always_inline__, __nodebug__, __target__("usermsr")))
+    _uwrmsr(unsigned long long __A, unsigned long long __B) {
+  return __builtin_ia32_uwrmsr(__A, __B);
+}
+
+#endif // __x86_64__
+#endif // __USERMSRINTRIN_H