EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/InterlockedCompareExchange64.asm

   1 ; Copyright (c) 2004, Intel Corporation. All rights reserved.<BR>
   2 ; This program and the accompanying materials
   3 ; are licensed and made available under the terms and conditions of the BSD License
   4 ; which accompanies this distribution.  The full text of the license may be found at
   5 ; http://opensource.org/licenses/bsd-license.php
   6 ;
   7 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
   8 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
   9 ;
  10 ; Module Name:
  11 ;
  12 ;   InterlockedCompareExchange64.Asm
  13 ;
  14 ; Abstract:
  15 ;
  16 ;   InterlockedCompareExchange64 function
  17 ;
  18 ; Notes:
  19 ;
  20 ;------------------------------------------------------------------------------
  21
  22     .code
  23
  24 ;------------------------------------------------------------------------------
  25 ; UINT64
  26 ; EFIAPI
  27 ; InterlockedCompareExchange64 (
  28 ;   IN      UINT64                    *Value,
  29 ;   IN      UINT64                    CompareValue,
  30 ;   IN      UINT64                    ExchangeValue
  31 ;   );
  32 ;------------------------------------------------------------------------------
  33 InternalSyncCompareExchange64   PROC
  34     mov     rax, rdx
  35     lock    cmpxchg [rcx], r8
  36     ret
  37 InternalSyncCompareExchange64   ENDP
  38
  39     END