1 files changed, 49 insertions, 0 deletions
diff --git a/contrib/llvm-project/clang/lib/Headers/hresetintrin.h b/contrib/llvm-project/clang/lib/Headers/hresetintrin.h
new file mode 100644
index 000000000000..646f6c130961
--- /dev/null
+++ b/contrib/llvm-project/clang/lib/Headers/hresetintrin.h
@@ -0,0 +1,49 @@
+/*===---------------- hresetintrin.h - HRESET 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 <hresetintrin.h> directly; include <x86gprintrin.h> instead."
+#endif
+
+#ifndef __HRESETINTRIN_H
+#define __HRESETINTRIN_H
+
+#if __has_extension(gnu_asm)
+
+/* Define the default attributes for the functions in this file. */
+#define __DEFAULT_FN_ATTRS \
+  __attribute__((__always_inline__, __nodebug__, __target__("hreset")))
+
+/// Provides a hint to the processor to selectively reset the prediction
+///    history of the current logical processor specified by a 32-bit integer
+///    value \a __eax.
+///
+/// This intrinsic corresponds to the <c> HRESET </c> instruction.
+///
+/// \code{.operation}
+///    IF __eax == 0
+///      // nop
+///    ELSE
+///      FOR i := 0 to 31
+///        IF __eax[i]
+///          ResetPredictionFeature(i)
+///        FI
+///      ENDFOR
+///    FI
+/// \endcode
+static __inline void __DEFAULT_FN_ATTRS
+_hreset(int __eax)
+{
+  __asm__ ("hreset $0" :: "a"(__eax));
+}
+
+#undef __DEFAULT_FN_ATTRS
+
+#endif /* __has_extension(gnu_asm) */
+
+#endif /* __HRESETINTRIN_H */