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ab1096fd | 1 | ;------------------------------------------------------------------------------\r |
2 | ;\r | |
3 | ; Copyright (c) 2006, 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 | ; SetMem32.asm\r | |
15 | ;\r | |
16 | ; Abstract:\r | |
17 | ;\r | |
18 | ; SetMem32 function\r | |
19 | ;\r | |
20 | ; Notes:\r | |
21 | ;\r | |
22 | ;------------------------------------------------------------------------------\r | |
23 | \r | |
24 | .code\r | |
25 | \r | |
eb227e96 | 26 | ;------------------------------------------------------------------------------\r |
27 | ; VOID *\r | |
28 | ; InternalMemSetMem32 (\r | |
29 | ; IN VOID *Buffer,\r | |
30 | ; IN UINTN Count,\r | |
31 | ; IN UINT32 Value\r | |
32 | ; )\r | |
33 | ;------------------------------------------------------------------------------\r | |
34 | InternalMemSetMem32 PROC\r | |
35 | DB 49h, 0fh, 6eh, 0c0h ; movd mm0, r8 (Value)\r | |
36 | mov rax, rcx ; rax <- Buffer\r | |
37 | xchg rcx, rdx ; rcx <- Count rdx <- Buffer\r | |
38 | shr rcx, 1 ; rcx <- # of qwords to set\r | |
ab1096fd | 39 | jz @SetDwords\r |
eb227e96 | 40 | DB 0fh, 70h, 0C0h, 44h ; pshufw mm0, mm0, 44h\r |
ab1096fd | 41 | @@:\r |
eb227e96 | 42 | DB 0fh, 0e7h, 02h ; movntq [rdx], mm0\r |
43 | lea rdx, [rdx + 8] ; use "lea" to avoid flag changes\r | |
ab1096fd | 44 | loop @B\r |
45 | mfence\r | |
46 | @SetDwords:\r | |
eb227e96 | 47 | jnc @F\r |
48 | DB 0fh, 7eh, 02h ; movd [rdx], mm0\r | |
ab1096fd | 49 | @@:\r |
50 | ret\r | |
51 | InternalMemSetMem32 ENDP\r | |
52 | \r | |
53 | END\r |