15f757f3fSDimitry Andric /*===--------------- usermsrintrin.h - USERMSR intrinsics -----------------=== 25f757f3fSDimitry Andric * 35f757f3fSDimitry Andric * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 45f757f3fSDimitry Andric * See https://llvm.org/LICENSE.txt for license information. 55f757f3fSDimitry Andric * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 65f757f3fSDimitry Andric * 75f757f3fSDimitry Andric *===-----------------------------------------------------------------------=== 85f757f3fSDimitry Andric */ 95f757f3fSDimitry Andric #ifndef __X86GPRINTRIN_H 105f757f3fSDimitry Andric #error "Never use <usermsrintrin.h> directly; include <x86gprintrin.h> instead." 115f757f3fSDimitry Andric #endif // __X86GPRINTRIN_H 125f757f3fSDimitry Andric 135f757f3fSDimitry Andric #ifndef __USERMSRINTRIN_H 145f757f3fSDimitry Andric #define __USERMSRINTRIN_H 155f757f3fSDimitry Andric #ifdef __x86_64__ 165f757f3fSDimitry Andric 17*647cbc5dSDimitry Andric /// Reads the contents of a 64-bit MSR specified in \a __A into \a dst. 18*647cbc5dSDimitry Andric /// 19*647cbc5dSDimitry Andric /// This intrinsic corresponds to the <c> URDMSR </c> instruction. 20*647cbc5dSDimitry Andric /// \param __A 21*647cbc5dSDimitry Andric /// An unsigned long long. 22*647cbc5dSDimitry Andric /// 23*647cbc5dSDimitry Andric /// \code{.operation} 24*647cbc5dSDimitry Andric /// DEST := MSR[__A] 25*647cbc5dSDimitry Andric /// \endcode 265f757f3fSDimitry Andric static __inline__ unsigned long long 275f757f3fSDimitry Andric __attribute__((__always_inline__, __nodebug__, __target__("usermsr"))) 285f757f3fSDimitry Andric _urdmsr(unsigned long long __A) { 295f757f3fSDimitry Andric return __builtin_ia32_urdmsr(__A); 305f757f3fSDimitry Andric } 315f757f3fSDimitry Andric 32*647cbc5dSDimitry Andric /// Writes the contents of \a __B into the 64-bit MSR specified in \a __A. 33*647cbc5dSDimitry Andric /// 34*647cbc5dSDimitry Andric /// This intrinsic corresponds to the <c> UWRMSR </c> instruction. 35*647cbc5dSDimitry Andric /// 36*647cbc5dSDimitry Andric /// \param __A 37*647cbc5dSDimitry Andric /// An unsigned long long. 38*647cbc5dSDimitry Andric /// \param __B 39*647cbc5dSDimitry Andric /// An unsigned long long. 40*647cbc5dSDimitry Andric /// 41*647cbc5dSDimitry Andric /// \code{.operation} 42*647cbc5dSDimitry Andric /// MSR[__A] := __B 43*647cbc5dSDimitry Andric /// \endcode 445f757f3fSDimitry Andric static __inline__ void 455f757f3fSDimitry Andric __attribute__((__always_inline__, __nodebug__, __target__("usermsr"))) 465f757f3fSDimitry Andric _uwrmsr(unsigned long long __A, unsigned long long __B) { 475f757f3fSDimitry Andric return __builtin_ia32_uwrmsr(__A, __B); 485f757f3fSDimitry Andric } 495f757f3fSDimitry Andric 505f757f3fSDimitry Andric #endif // __x86_64__ 515f757f3fSDimitry Andric #endif // __USERMSRINTRIN_H 52