hresetintrin.h revision 1.1.1.1
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