mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-10 14:23:31 +01:00
50 lines
1.3 KiB
NASM
50 lines
1.3 KiB
NASM
|
;------------------------------------------------------------------------------
|
||
|
|
;
|
||
|
|
; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
|
||
|
|
; SPDX-License-Identifier: BSD-2-Clause-Patent
|
||
|
|
;
|
||
|
|
; Module Name:
|
||
|
|
;
|
||
|
|
; SetMem32.nasm
|
||
|
|
;
|
||
|
|
; Abstract:
|
||
|
|
;
|
||
|
|
; SetMem32 function
|
||
|
|
;
|
||
|
|
; Notes:
|
||
|
|
;
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
SECTION .text
|
||
|
|
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
; VOID *
|
||
|
|
; EFIAPI
|
||
|
|
; InternalMemSetMem32 (
|
||
|
|
; IN VOID *Buffer,
|
||
|
|
; IN UINTN Count,
|
||
|
|
; IN UINT32 Value
|
||
|
|
; );
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
global ASM_PFX(InternalMemSetMem32)
|
||
|
|
ASM_PFX(InternalMemSetMem32):
|
||
|
|
mov eax, [esp + 4] ; eax <- Buffer as return value
|
||
|
|
mov ecx, [esp + 8] ; ecx <- Count
|
||
|
|
movd mm0, dword [esp + 12] ; mm0 <- Value
|
||
|
|
shr ecx, 1 ; ecx <- number of qwords to set
|
||
|
|
mov edx, eax ; edx <- Buffer
|
||
|
|
jz @SetDwords
|
||
|
|
movq mm1, mm0
|
||
|
|
psllq mm1, 32
|
||
|
|
por mm0, mm1
|
||
|
|
.0:
|
||
|
|
movq qword [edx], mm0
|
||
|
|
lea edx, [edx + 8] ; use "lea" to avoid change in flags
|
||
|
|
loop .0
|
||
|
|
@SetDwords:
|
||
|
|
jnc .1
|
||
|
|
movd dword [edx], mm0
|
||
|
|
.1:
|
||
|
|
ret
|
||
|
|
|