1 #------------------------------------------------------------------------------
3 # Copyright (c) 2006, Intel Corporation
4 # All rights reserved. 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
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.
22 #------------------------------------------------------------------------------
24 .globl _InternalMemCopyMem
26 #------------------------------------------------------------------------------
29 # InternalMemCopyMem (
30 # IN VOID *Destination,
34 #------------------------------------------------------------------------------
38 movl 16(%esp), %esi # esi <- Source
39 movl 12(%esp), %edi # edi <- Destination
40 movl 20(%esp), %edx # edx <- Count
41 leal -1(%esi,%edx,), %eax # eax <- End of Source
44 cmpl %edi, %eax # Overlapped?
45 jae L_CopyBackward # Copy backward if overlapped
49 andl $7, %ecx # ecx + esi aligns on 8-byte boundary
53 subl %ecx, %edx # edx <- remaining bytes to copy
59 shrl $3, %ecx # ecx <- # of Qwords to copy
63 movq %mm0, (%esp) # save mm0
70 movq (%esp), %mm0 # restore mm0
71 popl %ecx # stack cleanup
72 popl %ecx # stack cleanup
75 movl %eax, %esi # esi <- Last byte in Source
76 leal -1(%edi,%edx,), %edi # edi <- Last byte in Destination