mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-03 13:13:30 +01:00
63 lines
1.7 KiB
NASM
63 lines
1.7 KiB
NASM
|
;------------------------------------------------------------------------------
|
||
|
|
;
|
||
|
|
; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
|
||
|
|
; SPDX-License-Identifier: BSD-2-Clause-Patent
|
||
|
|
;
|
||
|
|
; Module Name:
|
||
|
|
;
|
||
|
|
; SetMem.nasm
|
||
|
|
;
|
||
|
|
; Abstract:
|
||
|
|
;
|
||
|
|
; SetMem function
|
||
|
|
;
|
||
|
|
; Notes:
|
||
|
|
;
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
SECTION .text
|
||
|
|
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
; VOID *
|
||
|
|
; EFIAPI
|
||
|
|
; InternalMemSetMem (
|
||
|
|
; IN VOID *Buffer,
|
||
|
|
; IN UINTN Count,
|
||
|
|
; IN UINT8 Value
|
||
|
|
; )
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
global ASM_PFX(InternalMemSetMem)
|
||
|
|
ASM_PFX(InternalMemSetMem):
|
||
|
|
push edi
|
||
|
|
mov al, [esp + 16]
|
||
|
|
mov ah, al
|
||
|
|
shrd edx, eax, 16
|
||
|
|
shld eax, edx, 16
|
||
|
|
mov ecx, [esp + 12] ; ecx <- Count
|
||
|
|
mov edi, [esp + 8] ; edi <- Buffer
|
||
|
|
mov edx, ecx
|
||
|
|
and edx, 7
|
||
|
|
shr ecx, 3 ; # of Qwords to set
|
||
|
|
jz @SetBytes
|
||
|
|
add esp, -0x10
|
||
|
|
movq [esp], mm0 ; save mm0
|
||
|
|
movq [esp + 8], mm1 ; save mm1
|
||
|
|
movd mm0, eax
|
||
|
|
movd mm1, eax
|
||
|
|
psllq mm0, 32
|
||
|
|
por mm0, mm1 ; fill mm0 with 8 Value's
|
||
|
|
.0:
|
||
|
|
movq [edi], mm0
|
||
|
|
add edi, 8
|
||
|
|
loop .0
|
||
|
|
movq mm0, [esp] ; restore mm0
|
||
|
|
movq mm1, [esp + 8] ; restore mm1
|
||
|
|
add esp, 0x10 ; stack cleanup
|
||
|
|
@SetBytes:
|
||
|
|
mov ecx, edx
|
||
|
|
rep stosb
|
||
|
|
mov eax, [esp + 8] ; eax <- Buffer as return value
|
||
|
|
pop edi
|
||
|
|
ret
|
||
|
|
|