usermsrintrin.h (1572B) - Raw
1 /*===--------------- usermsrintrin.h - USERMSR 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 <usermsrintrin.h> directly; include <x86gprintrin.h> instead." 11 #endif // __X86GPRINTRIN_H 12 13 #ifndef __USERMSRINTRIN_H 14 #define __USERMSRINTRIN_H 15 #ifdef __x86_64__ 16 17 /// Reads the contents of a 64-bit MSR specified in \a __A into \a dst. 18 /// 19 /// This intrinsic corresponds to the <c> URDMSR </c> instruction. 20 /// \param __A 21 /// An unsigned long long. 22 /// 23 /// \code{.operation} 24 /// DEST := MSR[__A] 25 /// \endcode 26 static __inline__ unsigned long long 27 __attribute__((__always_inline__, __nodebug__, __target__("usermsr"))) 28 _urdmsr(unsigned long long __A) { 29 return __builtin_ia32_urdmsr(__A); 30 } 31 32 /// Writes the contents of \a __B into the 64-bit MSR specified in \a __A. 33 /// 34 /// This intrinsic corresponds to the <c> UWRMSR </c> instruction. 35 /// 36 /// \param __A 37 /// An unsigned long long. 38 /// \param __B 39 /// An unsigned long long. 40 /// 41 /// \code{.operation} 42 /// MSR[__A] := __B 43 /// \endcode 44 static __inline__ void 45 __attribute__((__always_inline__, __nodebug__, __target__("usermsr"))) 46 _uwrmsr(unsigned long long __A, unsigned long long __B) { 47 return __builtin_ia32_uwrmsr(__A, __B); 48 } 49 50 #endif // __x86_64__ 51 #endif // __USERMSRINTRIN_H