1;------------------------------------------------------------------------------
2;
3; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
4; 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;
14;   CompareMem.Asm
15;
16; Abstract:
17;
18;   CompareMem function
19;
20; Notes:
21;
22;   The following BaseMemoryLib instances contain the same copy of this file:
23;
24;       BaseMemoryLibRepStr
25;       BaseMemoryLibMmx
26;       BaseMemoryLibSse2
27;       BaseMemoryLibOptDxe
28;       BaseMemoryLibOptPei
29;
30;------------------------------------------------------------------------------
31
32    .code
33
34;------------------------------------------------------------------------------
35; INTN
36; EFIAPI
37; InternalMemCompareMem (
38;   IN      CONST VOID                *DestinationBuffer,
39;   IN      CONST VOID                *SourceBuffer,
40;   IN      UINTN                     Length
41;   );
42;------------------------------------------------------------------------------
43InternalMemCompareMem   PROC    USES    rsi rdi
44    mov     rsi, rcx
45    mov     rdi, rdx
46    mov     rcx, r8
47    repe    cmpsb
48    movzx   rax, byte ptr [rsi - 1]
49    movzx   rdx, byte ptr [rdi - 1]
50    sub     rax, rdx
51    ret
52InternalMemCompareMem   ENDP
53
54    END
55