audk/MdePkg/Library/BaseLib/X64/ReadTsc.asm

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;------------------------------------------------------------------------------
;
; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
; This program and the accompanying materials
; are licensed and made available under the terms and conditions of the BSD License
; which accompanies this distribution. The full text of the license may be found at
; http://opensource.org/licenses/bsd-license.php
;
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
;
; Module Name:
;
; ReadTsc.Asm
;
; Abstract:
;
; AsmReadTsc function
;
; Notes:
;
;------------------------------------------------------------------------------
.code
;------------------------------------------------------------------------------
; UINT64
; EFIAPI
; AsmReadTsc (
; VOID
; );
;------------------------------------------------------------------------------
AsmReadTsc PROC
rdtsc
shl rdx, 20h
or rax, rdx
ret
AsmReadTsc ENDP
END