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f1baef62 | 1 | #------------------------------------------------------------------------------\r |
2 | #\r | |
c2049caa | 3 | # Copyright (c) 2006 - 2008, Intel Corporation\r |
f1baef62 | 4 | # All rights reserved. This program and the accompanying materials\r |
5 | # are licensed and made available under the terms and conditions of the BSD License\r | |
6 | # which accompanies this distribution. The full text of the license may be found at\r | |
7 | # http://opensource.org/licenses/bsd-license.php\r | |
8 | #\r | |
9 | # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
10 | # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
11 | #\r | |
12 | # Module Name:\r | |
13 | #\r | |
c2049caa | 14 | # InterlockedCompareExchange32.S\r |
f1baef62 | 15 | #\r |
16 | # Abstract:\r | |
17 | #\r | |
18 | # InterlockedCompareExchange32 function\r | |
19 | #\r | |
20 | # Notes:\r | |
21 | #\r | |
22 | #------------------------------------------------------------------------------\r | |
23 | \r | |
24 | #------------------------------------------------------------------------------\r | |
25 | # UINT32\r | |
26 | # EFIAPI\r | |
27 | # InterlockedCompareExchange32 (\r | |
28 | # IN UINT32 *Value,\r | |
29 | # IN UINT32 CompareValue,\r | |
30 | # IN UINT32 ExchangeValue\r | |
31 | # );\r | |
32 | #------------------------------------------------------------------------------\r | |
85c25283 | 33 | .global ASM_PFX(InternalSyncCompareExchange32)\r |
34 | ASM_PFX(InternalSyncCompareExchange32):\r | |
f1baef62 | 35 | mov %edx, %eax\r |
36 | lock cmpxchg %r8d, (%rcx)\r | |
37 | ret\r |