1;------------------------------------------------------------------------------
2;
3; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
4; This program and the accompanying materials
5; are licensed and made available under the terms and conditions of the BSD License
6; which accompanies this distribution.  The full text of the license may be found at
7; http://opensource.org/licenses/bsd-license.php.
8;
9; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
10; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
11;
12; Module Name:
13;
14;   SetMem.asm
15;
16; Abstract:
17;
18;   SetMem function
19;
20; Notes:
21;
22;------------------------------------------------------------------------------
23
24    .code
25
26;------------------------------------------------------------------------------
27; VOID *
28; EFIAPI
29; InternalMemSetMem (
30;   OUT     VOID                      *Buffer,
31;   IN      UINTN                     Length,
32;   IN      UINT8                     Value
33;   );
34;------------------------------------------------------------------------------
35InternalMemSetMem   PROC    USES    rdi
36    mov     rax, r8
37    mov     ah, al
38    DB      48h, 0fh, 6eh, 0c0h         ; movd mm0, rax
39    mov     r8, rcx
40    mov     rdi, r8                     ; rdi <- Buffer
41    mov     rcx, rdx
42    and     edx, 7
43    shr     rcx, 3
44    jz      @SetBytes
45    DB      0fh, 70h, 0C0h, 00h         ; pshufw mm0, mm0, 0h
46@@:
47    DB      0fh, 0e7h, 07h              ; movntq [rdi], mm0
48    add     rdi, 8
49    loop    @B
50    mfence
51@SetBytes:
52    mov     ecx, edx
53    rep     stosb
54    mov     rax, r8
55    ret
56InternalMemSetMem   ENDP
57
58    END
59