1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
;------------------------------------------------------------------------------
;
; Copyright (c) 2006, Intel Corporation
; All rights reserved. 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:
;
; SetMem64.asm
;
; Abstract:
;
; SetMem64 function
;
; Notes:
;
;------------------------------------------------------------------------------
.code
;------------------------------------------------------------------------------
; VOID *
; InternalMemSetMem64 (
; IN VOID *Buffer,
; IN UINTN Count,
; IN UINT64 Value
; )
;------------------------------------------------------------------------------
InternalMemSetMem64 PROC
mov rax, rcx ; rax <- Buffer
xchg rcx, rdx ; rcx <- Count & rdx <- Buffer
test dl, 8
movd xmm0, r8
jz @F
mov [rdx], r8
add rdx, 8
dec rcx
@@:
shr rcx, 1
jz @SetQwords
movlhps xmm0, xmm0
@@:
movntdq [rdx], xmm0
lea rdx, [rdx + 16]
loop @B
mfence
@SetQwords:
jnc @F
mov [rdx], r8
@@:
ret
InternalMemSetMem64 ENDP
END
|
