1 files changed, 38 insertions, 0 deletions
diff --git a/contrib/llvm-project/clang/lib/Headers/clwbintrin.h b/contrib/llvm-project/clang/lib/Headers/clwbintrin.h
new file mode 100644
index 000000000000..3360d203f7d7
--- /dev/null
+++ b/contrib/llvm-project/clang/lib/Headers/clwbintrin.h
@@ -0,0 +1,38 @@
+/*===---- clwbintrin.h - CLWB intrinsic ------------------------------------===
+ *
+ * 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 __IMMINTRIN_H
+#error "Never use <clwbintrin.h> directly; include <immintrin.h> instead."
+#endif
+
+#ifndef __CLWBINTRIN_H
+#define __CLWBINTRIN_H
+
+/* Define the default attributes for the functions in this file. */
+#define __DEFAULT_FN_ATTRS __attribute__((__always_inline__, __nodebug__,  __target__("clwb")))
+
+/// Writes back to memory the cache line (if modified) that contains the
+/// linear address specified in \a __p from any level of the cache hierarchy in
+/// the cache coherence domain
+///
+/// \headerfile <immintrin.h>
+///
+/// This intrinsic corresponds to the <c> CLWB </c> instruction.
+///
+/// \param __p
+///    A pointer to the memory location used to identify the cache line to be
+///    written back.
+static __inline__ void __DEFAULT_FN_ATTRS
+_mm_clwb(void const *__p) {
+  __builtin_ia32_clwb(__p);
+}
+
+#undef __DEFAULT_FN_ATTRS
+
+#endif