mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-27 12:15:19 +01:00
34 lines
888 B
NASM
34 lines
888 B
NASM
|
;------------------------------------------------------------------------------
|
||
|
|
;
|
||
|
|
; Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
|
||
|
|
; SPDX-License-Identifier: BSD-2-Clause-Patent
|
||
|
|
;
|
||
|
|
; Module Name:
|
||
|
|
;
|
||
|
|
; InterlockedDecrement.Asm
|
||
|
|
;
|
||
|
|
; Abstract:
|
||
|
|
;
|
||
|
|
; InterlockedDecrement function
|
||
|
|
;
|
||
|
|
; Notes:
|
||
|
|
;
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
SECTION .text
|
||
|
|
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
; UINT32
|
||
|
|
; EFIAPI
|
||
|
|
; InternalSyncDecrement (
|
||
|
|
; IN volatile UINT32 *Value
|
||
|
|
; );
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
global ASM_PFX(InternalSyncDecrement)
|
||
|
|
ASM_PFX(InternalSyncDecrement):
|
||
|
|
mov ecx, [esp + 4]
|
||
|
|
mov eax, 0FFFFFFFFh
|
||
|
|
lock xadd dword [ecx], eax
|
||
|
|
dec eax
|
||
|
|
ret
|