| #------------------------------------------------------------------------------ | |
| # | |
| # Copyright (c) 2008, 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: | |
| # | |
| # EfiCopyMemRep1.S | |
| # | |
| # Abstract: | |
| # | |
| # CopyMem function | |
| # | |
| # Notes: | |
| # | |
| #------------------------------------------------------------------------------ | |
| #include <EfiBind.h> | |
| .code: | |
| .globl ASM_PFX(EfiCommonLibCopyMem) | |
| #------------------------------------------------------------------------------ | |
| # VOID | |
| # EfiCommonLibCopyMem ( | |
| # OUT VOID *Destination, | |
| # IN VOID *Source, | |
| # IN UINTN Count | |
| # ); | |
| #------------------------------------------------------------------------------ | |
| ASM_PFX(EfiCommonLibCopyMem): | |
| push %rsi | |
| push %rdi | |
| cmp %rcx,%rdx | |
| je CopyMemDone | |
| cmp $0x0,%r8 | |
| je CopyMemDone | |
| mov %rdx,%rsi | |
| mov %rcx,%rdi | |
| lea -1(%r8,%rsi,1),%r9 | |
| cmp %rdi,%rsi | |
| jae CopyBytes | |
| cmp %rdi,%r9 | |
| jb CopyBytes | |
| mov %r9,%rsi | |
| lea -1(%r8,%rdi,1),%rdi | |
| std | |
| CopyBytes: | |
| mov %r8,%rcx | |
| rep movsb %ds:(%rsi),%es:(%rdi) | |
| cld | |
| CopyMemDone: | |
| pop %rdi | |
| pop %rsi | |
| retq | |