1/*===---------------- hresetintrin.h - HRESET intrinsics -------------------===
2 *
3 * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 * See https://llvm.org/LICENSE.txt for license information.
5 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 *
7 *===-----------------------------------------------------------------------===
8 */
9#ifndef __X86GPRINTRIN_H
10#error "Never use <hresetintrin.h> directly; include <x86gprintrin.h> instead."
11#endif
12
13#ifndef __HRESETINTRIN_H
14#define __HRESETINTRIN_H
15
16#if __has_extension(gnu_asm)
17
18/* Define the default attributes for the functions in this file. */
19#define __DEFAULT_FN_ATTRS \
20  __attribute__((__always_inline__, __nodebug__, __target__("hreset")))
21
22/// Provides a hint to the processor to selectively reset the prediction
23///    history of the current logical processor specified by a 32-bit integer
24///    value \a __eax.
25///
26/// This intrinsic corresponds to the <c> HRESET </c> instruction.
27///
28/// \operation
29///    IF __eax == 0
30///      // nop
31///    ELSE
32///      FOR i := 0 to 31
33///        IF __eax[i]
34///          ResetPredictionFeature(i)
35///        FI
36///      ENDFOR
37///    FI
38/// \endoperation
39static __inline void __DEFAULT_FN_ATTRS
40_hreset(int __eax)
41{
42  __asm__ ("hreset $0" :: "a"(__eax));
43}
44
45#undef __DEFAULT_FN_ATTRS
46
47#endif /* __has_extension(gnu_asm) */
48
49#endif /* __HRESETINTRIN_H */
50