1 files changed, 36 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange32.nasm b/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedCompareExchange32.nasm
new file mode 100644
index 00000000..945bdce6
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/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
+