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631f060b | 1 | #------------------------------------------------------------------------------ |
2 | # | |
3 | # Copyright (c) 2006, Intel Corporation | |
4 | # All rights reserved. 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 | # | |
5da37dda | 14 | # CompareMem.S |
631f060b | 15 | # |
16 | # Abstract: | |
17 | # | |
18 | # CompareMem function | |
19 | # | |
20 | # Notes: | |
21 | # | |
2bfb6009 | 22 | # The following BaseMemoryLib instances contain the same copy of this file: |
631f060b | 23 | # |
24 | # BaseMemoryLibRepStr | |
25 | # BaseMemoryLibMmx | |
26 | # BaseMemoryLibSse2 | |
2bfb6009 LG |
27 | # BaseMemoryLibOptDxe |
28 | # BaseMemoryLibOptPei | |
631f060b | 29 | # |
30 | #------------------------------------------------------------------------------ | |
31 | ||
85c25283 | 32 | .globl ASM_PFX(InternalMemCompareMem) |
631f060b | 33 | |
34 | #------------------------------------------------------------------------------ | |
35 | # INTN | |
36 | # EFIAPI | |
37 | # InternalMemCompareMem ( | |
38 | # IN CONST VOID *DestinationBuffer, | |
39 | # IN CONST VOID *SourceBuffer, | |
40 | # IN UINTN Length | |
41 | # ); | |
42 | #------------------------------------------------------------------------------ | |
85c25283 | 43 | ASM_PFX(InternalMemCompareMem): |
631f060b | 44 | push %esi |
45 | push %edi | |
46 | movl 12(%esp), %esi | |
47 | movl 16(%esp), %edi | |
48 | movl 20(%esp), %ecx | |
49 | repe cmpsb | |
50 | movzbl -1(%esi), %eax | |
51 | movzbl -1(%edi), %edx | |
52 | subl %edx, %eax | |
53 | pop %edi | |
54 | pop %esi | |
55 | ret |