1;------------------------------------------------------------------------------
2;
3; Copyright (c) 2006 - 2008, 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;    IN VOID   *Buffer,
31;    IN UINTN  Count,
32;    IN UINT8  Value
33;    )
34;------------------------------------------------------------------------------
35InternalMemSetMem   PROC    USES    rdi rbx
36    push    rcx       ; push Buffer
37    mov     rax, r8   ; rax = Value
38    and     rax, 0ffh ; rax = lower 8 bits of r8, upper 56 bits are 0
39    mov     ah,  al   ; ah  = al
40    mov     bx,  ax   ; bx  = ax
41    shl     rax, 10h  ; rax = ax << 16
42    mov     ax,  bx   ; ax  = bx
43    mov     rbx, rax  ; ebx = eax
44    shl     rax, 20h  ; rax = rax << 32
45    or      rax, rbx  ; eax = ebx
46    mov     rdi, rcx  ; rdi = Buffer
47    mov     rcx, rdx  ; rcx = Count
48    shr     rcx, 3    ; rcx = rcx / 8
49    cld
50    rep     stosq
51    mov     rcx, rdx  ; rcx = rdx
52    and     rcx, 7    ; rcx = rcx & 7
53    rep     stosb
54    pop     rax       ; rax = Buffer
55    ret
56InternalMemSetMem   ENDP
57
58    END
59