MdePkg/Library/BaseLib/Ia32/InterlockedCompareExchange64.S

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