;------------------------------------------------------------------------------ | |
; | |
; 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 |