summaryrefslogtreecommitdiff
path: root/MdePkg/Library/BaseMemoryLibMmx/X64/SetMem64.nasm
blob: fcc44294a8641760c3b2ded00f1ad2859f61d2e7 (plain)
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
;------------------------------------------------------------------------------
;
; Copyright (c) 2006 - 2022, Intel Corporation. All rights reserved.<BR>
; SPDX-License-Identifier: BSD-2-Clause-Patent
;
; Module Name:
;
;   SetMem64.nasm
;
; Abstract:
;
;   SetMem64 function
;
; Notes:
;
;------------------------------------------------------------------------------

    DEFAULT REL
    SECTION .text

;------------------------------------------------------------------------------
;  VOID *
;  InternalMemSetMem64 (
;    IN VOID   *Buffer,
;    IN UINTN  Count,
;    IN UINT64 Value
;    )
;------------------------------------------------------------------------------
global ASM_PFX(InternalMemSetMem64)
ASM_PFX(InternalMemSetMem64):
    movq    mm0, r8
    mov     rax, rcx                    ; rax <- Buffer
    xchg    rcx, rdx                    ; rcx <- Count
.0:
    movntq  [rdx], mm0
    add     rdx, 8
    loop    .0
    mfence
    ret