--- /dev/null
+;------------------------------------------------------------------------------\r
+;\r
+; Copyright (c) 2006, Intel Corporation\r
+; All rights reserved. This program and the accompanying materials\r
+; are licensed and made available under the terms and conditions of the BSD License\r
+; which accompanies this distribution. The full text of the license may be found at\r
+; http://opensource.org/licenses/bsd-license.php\r
+;\r
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+;\r
+; Module Name:\r
+;\r
+; CompareMem.Asm\r
+;\r
+; Abstract:\r
+;\r
+; CompareMem function\r
+;\r
+; Notes:\r
+;\r
+; The following BaseMemoryLib instances share the same version of this file:\r
+;\r
+; BaseMemoryLibRepStr\r
+; BaseMemoryLibMmx\r
+; BaseMemoryLibSse2\r
+;\r
+;------------------------------------------------------------------------------\r
+\r
+ .code\r
+\r
+;------------------------------------------------------------------------------\r
+; INTN\r
+; EFIAPI\r
+; InternalMemCompareMem (\r
+; IN CONST VOID *DestinationBuffer,\r
+; IN CONST VOID *SourceBuffer,\r
+; IN UINTN Length\r
+; );\r
+;------------------------------------------------------------------------------\r
+InternalMemCompareMem PROC USES rsi rdi\r
+ mov rsi, rcx\r
+ mov rdi, rdx\r
+ mov rcx, r8\r
+ repe cmpsb\r
+ movzx rax, byte ptr [rsi - 1]\r
+ movzx rdx, byte ptr [rdi - 1]\r
+ sub rax, rdx\r
+ ret\r
+InternalMemCompareMem ENDP\r
+\r
+ END\r