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;   SetMem32.asm
15;
16; Abstract:
17;
18;   SetMem32 function
19;
20; Notes:
21;
22;------------------------------------------------------------------------------
23
24    .code
25
26;------------------------------------------------------------------------------
27;  VOID *
28;  InternalMemSetMem32 (
29;    IN VOID   *Buffer,
30;    IN UINTN  Count,
31;    IN UINT32 Value
32;    )
33;------------------------------------------------------------------------------
34InternalMemSetMem32 PROC
35    DB      49h, 0fh, 6eh, 0c0h         ; movd mm0, r8 (Value)
36    mov     rax, rcx                    ; rax <- Buffer
37    xchg    rcx, rdx                    ; rcx <- Count  rdx <- Buffer
38    shr     rcx, 1                      ; rcx <- # of qwords to set
39    jz      @SetDwords
40    DB      0fh, 70h, 0C0h, 44h         ; pshufw mm0, mm0, 44h
41@@:
42    DB      0fh, 0e7h, 02h              ; movntq [rdx], mm0
43    lea     rdx, [rdx + 8]              ; use "lea" to avoid flag changes
44    loop    @B
45    mfence
46@SetDwords:
47    jnc     @F
48    DB      0fh, 7eh, 02h               ; movd [rdx], mm0
49@@:
50    ret
51InternalMemSetMem32 ENDP
52
53    END
54