hresetintrin.h (1395B) - Raw
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 */