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 DEFAULT REL 33 SECTION .text 34 35 ;------------------------------------------------------------------------------ 36 ; INTN 37 ; EFIAPI 38 ; InternalMemCompareMem ( 39 ; IN CONST VOID *DestinationBuffer, 40 ; IN CONST VOID *SourceBuffer, 41 ; IN UINTN Length 42 ; ); 43 ;------------------------------------------------------------------------------ 44 global ASM_PFX(InternalMemCompareMem) 45 ASM_PFX(InternalMemCompareMem): 46 push rsi 47 push rdi 48 mov rsi, rcx 49 mov rdi, rdx 50 mov rcx, r8 51 repe cmpsb 52 movzx rax, byte [rsi - 1] 53 movzx rdx, byte [rdi - 1] 54 sub rax, rdx 55 pop rdi 56 pop rsi 57 ret 58 59
