diff options
Diffstat (limited to 'MdePkg/Library/BaseSynchronizationLib/X64/InterlockedCompareExchange16.nasm')
| -rw-r--r-- | MdePkg/Library/BaseSynchronizationLib/X64/InterlockedCompareExchange16.nasm | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedCompareExchange16.nasm b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedCompareExchange16.nasm new file mode 100644 index 000000000000..b9ef3d4f9def --- /dev/null +++ b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedCompareExchange16.nasm @@ -0,0 +1,42 @@ +;------------------------------------------------------------------------------ +; +; Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR> +; Copyright (c) 2015, Linaro Ltd. All rights reserved.<BR> +; This program and the accompanying materials +; are licensed and made available under the terms and conditions of the BSD License +; which accompanies this distribution. The full text of the license may be found at +; http://opensource.org/licenses/bsd-license.php. +; +; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +; +; Module Name: +; +; InterlockedCompareExchange16.Asm +; +; Abstract: +; +; InterlockedCompareExchange16 function +; +; Notes: +; +;------------------------------------------------------------------------------ + + DEFAULT REL + SECTION .text + +;------------------------------------------------------------------------------ +; UINT16 +; EFIAPI +; InternalSyncCompareExchange16 ( +; IN volatile UINT16 *Value, +; IN UINT16 CompareValue, +; IN UINT16 ExchangeValue +; ); +;------------------------------------------------------------------------------ +global ASM_PFX(InternalSyncCompareExchange16) +ASM_PFX(InternalSyncCompareExchange16): + mov ax, dx + lock cmpxchg [rcx], r8w + ret + |