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