MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange64.nasm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
   4 ; SPDX-License-Identifier: BSD-2-Clause-Patent
   5 ;
   6 ; Module Name:
   7 ;
   8 ;   InterlockedCompareExchange64.Asm
   9 ;
  10 ; Abstract:
  11 ;
  12 ;   InterlockedCompareExchange64 function
  13 ;
  14 ; Notes:
  15 ;
  16 ;------------------------------------------------------------------------------
  17
  18     SECTION .text
  19
  20 ;------------------------------------------------------------------------------
  21 ; UINT64
  22 ; EFIAPI
  23 ; InternalSyncCompareExchange64 (
  24 ;   IN      volatile UINT64           *Value,
  25 ;   IN      UINT64                    CompareValue,
  26 ;   IN      UINT64                    ExchangeValue
  27 ;   );
  28 ;------------------------------------------------------------------------------
  29 global ASM_PFX(InternalSyncCompareExchange64)
  30 ASM_PFX(InternalSyncCompareExchange64):
  31     push    esi
  32     push    ebx
  33     mov     esi, [esp + 12]
  34     mov     eax, [esp + 16]
  35     mov     edx, [esp + 20]
  36     mov     ebx, [esp + 24]
  37     mov     ecx, [esp + 28]
  38     lock    cmpxchg8b [esi]
  39     pop     ebx
  40     pop     esi
  41     ret
  42