MdePkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / MdePkg / Library / BaseSynchronizationLib / X64 / InterlockedDecrement.nasm

diff --git a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm
index e140e44e5533aca2edf24586e6c6094fb15a3b8b..945043da9a222495dbb07fefae22175aa94e0048 100644 (file)
--- a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm
+++ b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm
@@ -1,13 +1,7 @@
 ;------------------------------------------------------------------------------\r
 ;\r
-; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>\r
-; This program and the accompanying materials\r
-; are licensed and made available under the terms and conditions of the BSD License\r
-; which accompanies this distribution.  The full text of the license may be found at\r
-; http://opensource.org/licenses/bsd-license.php.\r
-;\r
-; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
-; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+; Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
+; SPDX-License-Identifier: BSD-2-Clause-Patent\r
 ;\r
 ; Module Name:\r
 ;\r
@@ -27,13 +21,13 @@
 ;------------------------------------------------------------------------------\r
 ; UINT32\r
 ; EFIAPI\r
-; InterlockedDecrement (\r
-;   IN      UINT32                    *Value\r
+; InternalSyncDecrement (\r
+;   IN      volatile UINT32           *Value\r
 ;   );\r
 ;------------------------------------------------------------------------------\r
 global ASM_PFX(InternalSyncDecrement)\r
 ASM_PFX(InternalSyncDecrement):\r
-    lock    dec     dword [rcx]\r
-    mov     eax, [rcx]\r
+    mov       eax, 0FFFFFFFFh\r
+    lock xadd dword [rcx], eax\r
+    dec       eax\r
     ret\r
-\r