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bdfb1261 | 1 | # |
2 | # ConvertAsm.py: Automatically generated from CompareMem.asm | |
3 | # | |
4 | #------------------------------------------------------------------------------ | |
5 | # | |
6 | # Copyright (c) 2006, Intel Corporation | |
7 | # All rights reserved. This program and the accompanying materials | |
8 | # are licensed and made available under the terms and conditions of the BSD License | |
9 | # which accompanies this distribution. The full text of the license may be found at | |
10 | # http://opensource.org/licenses/bsd-license.php | |
11 | # | |
12 | # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
13 | # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
14 | # | |
15 | # Module Name: | |
16 | # | |
17 | # CompareMem.S | |
18 | # | |
19 | # Abstract: | |
20 | # | |
21 | # CompareMem function | |
22 | # | |
23 | # Notes: | |
24 | # | |
2bfb6009 | 25 | # The following BaseMemoryLib instances contain the same copy of this file: |
bdfb1261 | 26 | # |
27 | # BaseMemoryLibRepStr | |
28 | # BaseMemoryLibMmx | |
29 | # BaseMemoryLibSse2 | |
2bfb6009 LG |
30 | # BaseMemoryLibOptDxe |
31 | # BaseMemoryLibOptPei | |
bdfb1261 | 32 | # |
33 | #------------------------------------------------------------------------------ | |
34 | ||
35 | ||
36 | #------------------------------------------------------------------------------ | |
37 | # INTN | |
38 | # EFIAPI | |
39 | # InternalMemCompareMem ( | |
40 | # IN CONST VOID *DestinationBuffer, | |
41 | # IN CONST VOID *SourceBuffer, | |
42 | # IN UINTN Length | |
43 | # ); | |
44 | #------------------------------------------------------------------------------ | |
4df876ad | 45 | .intel_syntax noprefix |
46 | .globl ASM_PFX(InternalMemCompareMem) | |
47 | ASM_PFX(InternalMemCompareMem): | |
bdfb1261 | 48 | push rsi |
49 | push rdi | |
50 | mov rsi, rcx | |
51 | mov rdi, rdx | |
52 | mov rcx, r8 | |
53 | repe cmpsb | |
54 | movzx rax, byte ptr [rsi - 1] | |
55 | movzx rdx, byte ptr [rdi - 1] | |
56 | sub rax, rdx | |
57 | pop rdi | |
58 | pop rsi | |
59 | ret | |
60 |