diff options
Diffstat (limited to 'roms/edk2/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange32.nasm')
| -rw-r--r-- | roms/edk2/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange32.nasm | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange32.nasm b/roms/edk2/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange32.nasm new file mode 100644 index 000000000..2591418e4 --- /dev/null +++ b/roms/edk2/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange32.nasm @@ -0,0 +1,36 @@ +;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+; Module Name:
+;
+; InterlockedCompareExchange32.Asm
+;
+; Abstract:
+;
+; InterlockedCompareExchange32 function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+ SECTION .text
+
+;------------------------------------------------------------------------------
+; UINT32
+; EFIAPI
+; InternalSyncCompareExchange32 (
+; IN volatile UINT32 *Value,
+; IN UINT32 CompareValue,
+; IN UINT32 ExchangeValue
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalSyncCompareExchange32)
+ASM_PFX(InternalSyncCompareExchange32):
+ mov ecx, [esp + 4]
+ mov eax, [esp + 8]
+ mov edx, [esp + 12]
+ lock cmpxchg [ecx], edx
+ ret
+
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