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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 | /// \code{.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 | /// \endcode |
39 | static __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 |
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