| # | |
| # ConvertAsm.py: Automatically generated from CopyMem.asm | |
| # | |
| #------------------------------------------------------------------------------ | |
| # | |
| # Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR> | |
| # 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 | |
| # ) | |
| #------------------------------------------------------------------------------ | |
| ASM_GLOBAL ASM_PFX(InternalMemCopyMem) | |
| ASM_PFX(InternalMemCopyMem): | |
| pushq %rsi | |
| pushq %rdi | |
| movq %rdx, %rsi # rsi <- Source | |
| movq %rcx, %rdi # rdi <- Destination | |
| leaq -1(%rsi, %r8,), %r9 # r9 <- End of Source | |
| cmpq %rdi, %rsi | |
| movq %rdi, %rax # rax <- Destination as return value | |
| jae L0 | |
| cmpq %rdi, %r9 | |
| jae L_CopyBackward # Copy backward if overlapped | |
| L0: | |
| movq %r8, %rcx | |
| andq $7, %r8 | |
| shrq $3, %rcx # rcx <- # of Qwords to copy | |
| jz L_CopyBytes | |
| movd %mm0, %r10 # (Save mm0 in r10) | |
| L1: | |
| movq (%rsi), %mm0 | |
| movntq %mm0, (%rdi) | |
| addq $8, %rsi | |
| addq $8, %rdi | |
| loop L1 | |
| mfence | |
| movd %r10, %mm0 # (Restore mm0) | |
| jmp L_CopyBytes | |
| L_CopyBackward: | |
| movq %r9, %rsi # rsi <- End of Source | |
| leaq -1(%rdi, %r8,), %rdi # rdi <- End of Destination | |
| std # set direction flag | |
| L_CopyBytes: | |
| movq %r8, %rcx | |
| rep movsb # Copy bytes backward | |
| cld | |
| popq %rdi | |
| popq %rsi | |
| ret |