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3eb9473e | 1 | ;------------------------------------------------------------------------------\r |
2 | ;\r | |
3 | ; Copyright (c) 2007, Intel Corporation\r | |
4 | ; All rights reserved. This program and the accompanying materials\r | |
5 | ; are licensed and made available under the terms and conditions of the BSD License\r | |
6 | ; which accompanies this distribution. The full text of the license may be found at\r | |
7 | ; http://opensource.org/licenses/bsd-license.php\r | |
8 | ;\r | |
9 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
10 | ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
11 | ;\r | |
12 | ; Module Name:\r | |
13 | ;\r | |
14 | ; SetMem.asm\r | |
15 | ;\r | |
16 | ; Abstract:\r | |
17 | ;\r | |
18 | ; SetMem function\r | |
19 | ;\r | |
20 | ; Notes:\r | |
21 | ;\r | |
22 | ;------------------------------------------------------------------------------\r | |
23 | \r | |
24 | .code\r | |
25 | \r | |
26 | ;------------------------------------------------------------------------------\r | |
27 | ; VOID *\r | |
28 | ; EFIAPI\r | |
29 | ; EfiCommonLibSetMem (\r | |
30 | ; OUT VOID *Buffer,\r | |
31 | ; IN UINTN Size,\r | |
32 | ; IN UINT8 Value\r | |
33 | ; );\r | |
34 | ;------------------------------------------------------------------------------\r | |
35 | EfiCommonLibSetMem PROC USES rdi\r | |
36 | cmp rdx, 0 ; if Size == 0, do nothing\r | |
37 | je @SetDone\r | |
38 | mov rax, r8\r | |
39 | mov ah, al\r | |
40 | DB 48h, 0fh, 6eh, 0c0h ; movd mm0, rax\r | |
41 | mov r8, rcx\r | |
42 | mov rdi, r8 ; rdi <- Buffer\r | |
43 | mov rcx, rdx\r | |
44 | and edx, 7\r | |
45 | shr rcx, 3\r | |
46 | jz @SetBytes\r | |
47 | DB 0fh, 70h, 0C0h, 00h ; pshufw mm0, mm0, 0h\r | |
48 | @@:\r | |
49 | DB 48h, 0fh, 7eh, 07h ; movd [rdi], mm0\r | |
50 | add rdi, 8\r | |
51 | loop @B\r | |
52 | @SetBytes:\r | |
53 | mov ecx, edx\r | |
54 | rep stosb\r | |
55 | mov rax, r8\r | |
56 | @SetDone:\r | |
57 | ret\r | |
58 | EfiCommonLibSetMem ENDP\r | |
59 | \r | |
60 | END\r |