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f1baef62 | 1 | #------------------------------------------------------------------------------ |
2 | # | |
c2049caa | 3 | # Copyright (c) 2006 - 2008, Intel Corporation |
f1baef62 | 4 | # All rights reserved. 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.S | |
15 | # | |
16 | # Abstract: | |
17 | # | |
18 | # InterlockedCompareExchange64 function | |
19 | # | |
20 | # Notes: | |
21 | # | |
22 | #------------------------------------------------------------------------------ | |
23 | ||
24 | ||
25 | #------------------------------------------------------------------------------ | |
26 | # UINT64 | |
27 | # EFIAPI | |
28 | # InterlockedCompareExchange64 ( | |
29 | # IN UINT64 *Value, | |
30 | # IN UINT64 CompareValue, | |
31 | # IN UINT64 ExchangeValue | |
32 | # ); | |
33 | #------------------------------------------------------------------------------ | |
85c25283 | 34 | .global ASM_PFX(InternalSyncCompareExchange64) |
35 | .align 16 | |
36 | ASM_PFX(InternalSyncCompareExchange64): | |
c2049caa | 37 | mov %rdx, %rax |
38 | lock cmpxchg %r8,(%rcx) | |
f1baef62 | 39 | ret |