| # | |
| # ConvertAsm.py: Automatically generated from CopyMem.asm | |
| # | |
| #------------------------------------------------------------------------------ | |
| # | |
| # Copyright (c) 2006 - 2008, Intel Corporation | |
| # All rights reserved. This program and the accompanying materials | |
| # are licensed and made available under the terms and conditions of the BSD License | |
| # which accompanies this distribution. The full text of the license may be found at | |
| # http://opensource.org/licenses/bsd-license.php | |
| # | |
| # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
| # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
| # | |
| # Module Name: | |
| # | |
| # CopyMem.S | |
| # | |
| # Abstract: | |
| # | |
| # CopyMem function | |
| # | |
| # Notes: | |
| # | |
| #------------------------------------------------------------------------------ | |
| #------------------------------------------------------------------------------ | |
| # VOID * | |
| # EFIAPI | |
| # InternalMemCopyMem ( | |
| # IN VOID *Destination, | |
| # IN VOID *Source, | |
| # IN UINTN Count | |
| # ) | |
| #------------------------------------------------------------------------------ | |
| .intel_syntax noprefix | |
| ASM_GLOBAL ASM_PFX(InternalMemCopyMem) | |
| ASM_PFX(InternalMemCopyMem): | |
| push rsi | |
| push rdi | |
| mov rsi, rdx # rsi <- Source | |
| mov rdi, rcx # rdi <- Destination | |
| lea r9, [rsi + r8 - 1] # r9 <- End of Source | |
| cmp rsi, rdi | |
| mov rax, rdi # rax <- Destination as return value | |
| jae L0 | |
| cmp r9, rdi | |
| jae L_CopyBackward # Copy backward if overlapped | |
| L0: | |
| mov rcx, r8 | |
| and r8, 7 | |
| shr rcx, 3 | |
| rep movsq # Copy as many Qwords as possible | |
| jmp L_CopyBytes | |
| L_CopyBackward: | |
| mov rsi, r9 # rsi <- End of Source | |
| lea rdi, [rdi + r8 - 1] # esi <- End of Destination | |
| std # set direction flag | |
| L_CopyBytes: | |
| mov rcx, r8 | |
| rep movsb # Copy bytes backward | |
| cld | |
| pop rdi | |
| pop rsi | |
| ret | |