Pirama Arumuga Nainar | 986b880 | 2021-06-03 16:00:34 -0700 | [diff] [blame] | 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 |
| 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 */ |