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c5ecf6c1 | 1 | ;------------------------------------------------------------------------------\r |
2 | ;\r | |
085c3968 HT |
3 | ; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r |
4 | ; This program and the accompanying materials\r | |
c5ecf6c1 | 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 | |
2fc59a00 | 7 | ; http://opensource.org/licenses/bsd-license.php.\r |
c5ecf6c1 | 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 | ; CompareMem.Asm\r | |
15 | ;\r | |
16 | ; Abstract:\r | |
17 | ;\r | |
18 | ; CompareMem function\r | |
19 | ;\r | |
20 | ; Notes:\r | |
21 | ;\r | |
2bfb6009 | 22 | ; The following BaseMemoryLib instances contain the same copy of this file:\r |
c5ecf6c1 | 23 | ;\r |
24 | ; BaseMemoryLibRepStr\r | |
25 | ; BaseMemoryLibMmx\r | |
26 | ; BaseMemoryLibSse2\r | |
2bfb6009 LG |
27 | ; BaseMemoryLibOptDxe\r |
28 | ; BaseMemoryLibOptPei\r | |
c5ecf6c1 | 29 | ;\r |
30 | ;------------------------------------------------------------------------------\r | |
31 | \r | |
32 | .code\r | |
33 | \r | |
34 | ;------------------------------------------------------------------------------\r | |
35 | ; INTN\r | |
36 | ; EFIAPI\r | |
37 | ; InternalMemCompareMem (\r | |
38 | ; IN CONST VOID *DestinationBuffer,\r | |
39 | ; IN CONST VOID *SourceBuffer,\r | |
40 | ; IN UINTN Length\r | |
41 | ; );\r | |
42 | ;------------------------------------------------------------------------------\r | |
43 | InternalMemCompareMem PROC USES rsi rdi\r | |
44 | mov rsi, rcx\r | |
45 | mov rdi, rdx\r | |
46 | mov rcx, r8\r | |
47 | repe cmpsb\r | |
48 | movzx rax, byte ptr [rsi - 1]\r | |
49 | movzx rdx, byte ptr [rdi - 1]\r | |
50 | sub rax, rdx\r | |
51 | ret\r | |
52 | InternalMemCompareMem ENDP\r | |
53 | \r | |
54 | END\r |