projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| c1ea912c | 1 | ;/*++\r |
| 2 | ;\r | |
| 4ea9375a HT |
3 | ;Copyright (c) 2007, Intel Corporation. All rights reserved.<BR>\r |
| 4 | ;This program and the accompanying materials \r | |
| c1ea912c | 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 | |
| 7 | ;http://opensource.org/licenses/bsd-license.php \r | |
| 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 | ; EfiCopyMemRep1.asm\r | |
| 15 | ;\r | |
| 16 | ;Abstract:\r | |
| 17 | ;\r | |
| 18 | ; This is the code that uses rep movsb CopyMem service\r | |
| 19 | ;\r | |
| 20 | ;--*/\r | |
| 21 | ;\r | |
| 22 | ;---------------------------------------------------------------------------\r | |
| 23 | .686\r | |
| 24 | .model flat,C\r | |
| 25 | .code\r | |
| 26 | \r | |
| 27 | ;---------------------------------------------------------------------------\r | |
| 28 | ;#include "Tiano.h"\r | |
| 29 | ;\r | |
| 30 | ;VOID\r | |
| 31 | ;EfiCommonLibCopyMem (\r | |
| 32 | ; IN VOID *Destination,\r | |
| 33 | ; IN VOID *Source,\r | |
| 34 | ; IN UINTN Count\r | |
| 35 | ; )\r | |
| 36 | ;/*++\r | |
| 37 | ;\r | |
| 38 | ;Routine Description:\r | |
| 39 | ;\r | |
| 40 | ; Copy Length bytes from Source to Destination.\r | |
| 41 | ;\r | |
| 42 | ;Arguments:\r | |
| 43 | ;\r | |
| 44 | ; Destination - Target of copy\r | |
| 45 | ;\r | |
| 46 | ; Source - Place to copy from\r | |
| 47 | ;\r | |
| 48 | ; Length - Number of bytes to copy\r | |
| 49 | ;\r | |
| 50 | ;Returns:\r | |
| 51 | ;\r | |
| 52 | ; None\r | |
| 53 | ;\r | |
| 54 | ;--*/\r | |
| 55 | EfiCommonLibCopyMem PROC\r | |
| 56 | push ebp\r | |
| 57 | mov ebp, esp\r | |
| 58 | push esi\r | |
| 59 | push edi\r | |
| 60 | mov esi, dword ptr[ebp + 0Ch] ; esi <- Source\r | |
| 61 | mov edi, dword ptr[ebp + 8] ; edi <- Destination\r | |
| 62 | mov edx, dword ptr[ebp + 10h] ; edx <- Count\r | |
| 63 | cmp esi, edi\r | |
| 64 | je _CopyDone\r | |
| 65 | cmp edx, 0\r | |
| 66 | je _CopyDone\r | |
| 67 | lea eax, [esi + edx - 1] ; eax <- End of Source\r | |
| 68 | cmp esi, edi\r | |
| 69 | jae _CopyBytes\r | |
| 70 | cmp eax, edi\r | |
| 71 | jb _CopyBytes ; Copy backward if overlapped\r | |
| 72 | mov esi, eax ; esi <- End of Source\r | |
| 73 | lea edi, [edi + edx - 1] ; edi <- End of Destination\r | |
| 74 | std\r | |
| 75 | _CopyBytes:\r | |
| 76 | mov ecx, edx\r | |
| 77 | rep movsb ; Copy bytes backward\r | |
| 78 | cld\r | |
| 79 | _CopyDone:\r | |
| 80 | pop edi\r | |
| 81 | pop esi\r | |
| 82 | pop ebp\r | |
| 83 | ret\r | |
| 84 | EfiCommonLibCopyMem ENDP\r | |
| 85 | END\r | |
| 86 | \r |