+++ /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
-; CopyMem.asm\r
-;\r
-; Abstract:\r
-;\r
-; CopyMem function\r
-;\r
-; Notes:\r
-;\r
-;------------------------------------------------------------------------------\r
-\r
- .686\r
- .model flat,C\r
- .mmx\r
- .code\r
-\r
-;------------------------------------------------------------------------------\r
-; VOID *\r
-; EFIAPI\r
-; InternalMemCopyMem (\r
-; IN VOID *Destination,\r
-; IN VOID *Source,\r
-; IN UINTN Count\r
-; );\r
-;------------------------------------------------------------------------------\r
-InternalMemCopyMem PROC USES esi edi\r
- mov esi, [esp + 16] ; esi <- Source\r
- mov edi, [esp + 12] ; edi <- Destination\r
- mov edx, [esp + 20] ; edx <- Count\r
- lea eax, [esi + edx - 1] ; eax <- End of Source\r
- cmp esi, edi\r
- jae @F\r
- cmp eax, edi ; Overlapped?\r
- jae @CopyBackward ; Copy backward if overlapped\r
-@@:\r
- mov ecx, edx\r
- and edx, 7\r
- shr ecx, 3 ; ecx <- # of Qwords to copy\r
- jz @CopyBytes\r
- push eax\r
- push eax\r
- movq [esp], mm0 ; save mm0\r
-@@:\r
- movq mm0, [esi]\r
- movq [edi], mm0\r
- add esi, 8\r
- add edi, 8\r
- loop @B\r
- movq mm0, [esp] ; restore mm0\r
- pop ecx ; stack cleanup\r
- pop ecx ; stack cleanup\r
- jmp @CopyBytes\r
-@CopyBackward:\r
- mov esi, eax ; esi <- Last byte in Source\r
- lea edi, [edi + edx - 1] ; edi <- Last byte in Destination\r
- std\r
-@CopyBytes:\r
- mov ecx, edx\r
- rep movsb\r
- cld\r
- mov eax, [esp + 12]\r
- ret\r
-InternalMemCopyMem ENDP\r
-\r
- END\r