MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange64.nasm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
   4 ; This program and the accompanying materials
   5 ; are licensed and made available under the terms and conditions of the BSD License
   6 ; which accompanies this distribution.  The full text of the license may be found at
   7 ; http://opensource.org/licenses/bsd-license.php.
   8 ;
   9 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11 ;
  12 ; Module Name:
  13 ;
  14 ;   InterlockedCompareExchange64.Asm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;   InterlockedCompareExchange64 function
  19 ;
  20 ; Notes:
  21 ;
  22 ;------------------------------------------------------------------------------
  23
  24     SECTION .text
  25
  26 ;------------------------------------------------------------------------------
  27 ; UINT64
  28 ; EFIAPI
  29 ; InternalSyncCompareExchange64 (
  30 ;   IN      volatile UINT64           *Value,
  31 ;   IN      UINT64                    CompareValue,
  32 ;   IN      UINT64                    ExchangeValue
  33 ;   );
  34 ;------------------------------------------------------------------------------
  35 global ASM_PFX(InternalSyncCompareExchange64)
  36 ASM_PFX(InternalSyncCompareExchange64):
  37     push    esi
  38     push    ebx
  39     mov     esi, [esp + 12]
  40     mov     eax, [esp + 16]
  41     mov     edx, [esp + 20]
  42     mov     ebx, [esp + 24]
  43     mov     ecx, [esp + 28]
  44     lock    cmpxchg8b [esi]
  45     pop     ebx
  46     pop     esi
  47     ret
  48