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.S 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 ASM_GLOBAL ASM_PFX(InternalMemCompareMem) 33 34 #------------------------------------------------------------------------------ 35 # INTN 36 # EFIAPI 37 # InternalMemCompareMem ( 38 # IN CONST VOID *DestinationBuffer, 39 # IN CONST VOID *SourceBuffer, 40 # IN UINTN Length 41 # ); 42 #------------------------------------------------------------------------------ 43 ASM_PFX(InternalMemCompareMem): 44 push %esi 45 push %edi 46 movl 12(%esp), %esi 47 movl 16(%esp), %edi 48 movl 20(%esp), %ecx 49 repe cmpsb 50 movzbl -1(%esi), %eax 51 movzbl -1(%edi), %edx 52 subl %edx, %eax 53 pop %edi 54 pop %esi 55 ret 56
