MdePkg/Library/BaseLib/Ipf/InterlockedCompareExchange64.s

   1 /// @file
   2 ///   Contains an implementation of InterlockedCompareExchange64 on Itanium-
   3 ///   based architecture.
   4 ///
   5 /// Copyright (c) 2006, Intel Corporation
   6 /// All rights reserved. This program and the accompanying materials
   7 /// are licensed and made available under the terms and conditions of the BSD License
   8 /// which accompanies this distribution.  The full text of the license may be found at
   9 /// http://opensource.org/licenses/bsd-license.php
  10 ///
  11 /// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12 /// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13 ///
  14 /// Module Name:  InterlockedCompareExchange64.s
  15 ///
  16 ///
  17
  18 .auto
  19 .text
  20
  21 .proc   InternalSyncCompareExchange64
  22 .type   InternalSyncCompareExchange64, @function
  23 InternalSyncCompareExchange64::
  24         mov                 ar.ccv = r33
  25         cmpxchg8.rel        r8  = [r64], r34
  26         mf
  27         br.ret.sptk.many    b0
  28 .endp   InternalSyncCompareExchange64