1;------------------------------------------------------------------------------
2;
3; Copyright (c) 2007, 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; EfiCommonLibSetMem (
30;   OUT     VOID                      *Buffer,
31;   IN      UINTN                     Size,
32;   IN      UINT8                     Value
33;   );
34;------------------------------------------------------------------------------
35EfiCommonLibSetMem   PROC    USES    rdi
36    cmp     rdx, 0                      ; if Size == 0, do nothing
37    je      @SetDone
38    mov     rax, r8
39    mov     ah, al
40    DB      48h, 0fh, 6eh, 0c0h         ; movd mm0, rax
41    mov     r8, rcx
42    mov     rdi, r8                     ; rdi <- Buffer
43    mov     rcx, rdx
44    and     edx, 7
45    shr     rcx, 3
46    jz      @SetBytes
47    DB      0fh, 70h, 0C0h, 00h         ; pshufw mm0, mm0, 0h
48@@:
49    DB      48h, 0fh, 7eh, 07h          ; movd [rdi], mm0
50    add     rdi, 8
51    loop    @B
52@SetBytes:
53    mov     ecx, edx
54    rep     stosb
55    mov     rax, r8
56@SetDone:
57    ret
58EfiCommonLibSetMem   ENDP
59
60    END
61