2 # ConvertAsm.py: Automatically generated from CopyMem.asm
4 #------------------------------------------------------------------------------
6 # Copyright (c) 2006 - 2009, Intel Corporation
7 # All rights reserved. This program and the accompanying materials
8 # are licensed and made available under the terms and conditions of the BSD License
9 # which accompanies this distribution. The full text of the license may be found at
10 # http://opensource.org/licenses/bsd-license.php
12 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
25 #------------------------------------------------------------------------------
27 #------------------------------------------------------------------------------
30 # InternalMemCopyMem (
31 # IN VOID *Destination,
35 #------------------------------------------------------------------------------
36 ASM_GLOBAL ASM_PFX(InternalMemCopyMem)
37 ASM_PFX(InternalMemCopyMem):
40 movq %rdx, %rsi # rsi <- Source
41 movq %rcx, %rdi # rdi <- Destination
42 leaq -1(%rsi,%r8,), %r9 # r9 <- Last byte of Source
44 movq %rdi, %rax # rax <- Destination as return value
45 jae L0 # Copy forward if Source > Destination
46 cmpq %rdi, %r9 # Overlapped?
47 jae L_CopyBackward # Copy backward if overlapped
50 subq %rdi, %rcx # rcx <- -rdi
51 andq $15, %rcx # rcx + rsi should be 16 bytes aligned
52 jz L1 # skip if rcx == 0
60 shrq $4, %rcx # rcx <- # of DQwords to copy
62 movdqu %xmm0, 0x18(%rsp) # save xmm0 on stack
64 movdqu (%rsi), %xmm0 # rsi may not be 16-byte aligned
65 movntdq %xmm0, (%rdi) # rdi should be 16-byte aligned
70 movdqa 0x18(%rsp), %xmm0 # restore xmm0
71 jmp L_CopyBytes # copy remaining bytes
73 movq %r9, %rsi # rsi <- Last byte of Source
74 leaq -1(%rdi, %r8,), %rdi # rdi <- Last byte of Destination