]> git.proxmox.com Git - mirror_edk2.git/blame - MdePkg/Library/BaseMemoryLibMmx/Ia32/CompareMem.asm
ArmPkg/ArmDisassemblerLib: fix check for MSR instruction
[mirror_edk2.git] / MdePkg / Library / BaseMemoryLibMmx / Ia32 / CompareMem.asm
CommitLineData
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 .686\r
33 .model flat,C\r
34 .code\r
35\r
36;------------------------------------------------------------------------------\r
37; INTN\r
38; EFIAPI\r
39; InternalMemCompareMem (\r
40; IN CONST VOID *DestinationBuffer,\r
41; IN CONST VOID *SourceBuffer,\r
42; IN UINTN Length\r
43; );\r
44;------------------------------------------------------------------------------\r
45InternalMemCompareMem PROC USES esi edi\r
46 mov esi, [esp + 12]\r
47 mov edi, [esp + 16]\r
48 mov ecx, [esp + 20]\r
49 repe cmpsb\r
50 movzx eax, byte ptr [esi - 1]\r
51 movzx edx, byte ptr [edi - 1]\r
52 sub eax, edx\r
53 ret\r
54InternalMemCompareMem ENDP\r
55\r
56 END\r