projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| b1ff428c | 1 | #\r |
| 2 | # ConvertAsm.py: Automatically generated from CopyMem.asm\r | |
| 3 | #\r | |
| 4 | #------------------------------------------------------------------------------\r | |
| 5 | #\r | |
| 84b5877f HT |
6 | # Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>\r |
| 7 | # This program and the accompanying materials\r | |
| b1ff428c | 8 | # are licensed and made available under the terms and conditions of the BSD License\r |
| 9 | # which accompanies this distribution. The full text of the license may be found at\r | |
| 10 | # http://opensource.org/licenses/bsd-license.php\r | |
| 11 | #\r | |
| 12 | # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 13 | # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 14 | #\r | |
| 15 | # Module Name:\r | |
| 16 | #\r | |
| 17 | # CopyMem.S\r | |
| 18 | #\r | |
| 19 | # Abstract:\r | |
| 20 | #\r | |
| 21 | # CopyMem function\r | |
| 22 | #\r | |
| 23 | # Notes:\r | |
| 24 | #\r | |
| 25 | #------------------------------------------------------------------------------\r | |
| 26 | \r | |
| 27 | \r | |
| 28 | #------------------------------------------------------------------------------\r | |
| 29 | # VOID *\r | |
| 30 | # EFIAPI\r | |
| 31 | # InternalMemCopyMem (\r | |
| 32 | # IN VOID *Destination,\r | |
| 33 | # IN VOID *Source,\r | |
| 34 | # IN UINTN Count\r | |
| 35 | # )\r | |
| 36 | #------------------------------------------------------------------------------\r | |
| 132f41f0 | 37 | ASM_GLOBAL ASM_PFX(InternalMemCopyMem)\r |
| b1ff428c | 38 | ASM_PFX(InternalMemCopyMem):\r |
| 1fef058f | 39 | pushq %rsi\r |
| 40 | pushq %rdi\r | |
| 41 | movq %rdx, %rsi # rsi <- Source\r | |
| 42 | movq %rcx, %rdi # rdi <- Destination\r | |
| 43 | leaq -1(%rsi, %r8,), %r9 # r9 <- End of Source\r | |
| 44 | cmpq %rdi, %rsi\r | |
| 45 | movq %rdi, %rax # rax <- Destination as return value\r | |
| b1ff428c | 46 | jae _InternalMemCopyMem_al_0000\r |
| 1fef058f | 47 | cmpq %rdi, %r9\r |
| b1ff428c | 48 | jae _atSym_CopyBackward # Copy backward if overlapped\r |
| 49 | _InternalMemCopyMem_al_0000:\r | |
| 1fef058f | 50 | movq %r8, %rcx\r |
| 51 | andq $7, %r8\r | |
| 52 | shrq $3, %rcx\r | |
| b1ff428c | 53 | rep movsq # Copy as many Qwords as possible\r |
| 54 | jmp _atSym_CopyBytes\r | |
| 55 | _atSym_CopyBackward:\r | |
| 1fef058f | 56 | movq %r9, %rsi # rsi <- End of Source\r |
| 57 | leaq -1(%rdi, %r8), %rdi # rdi <- End of Destination\r | |
| b1ff428c | 58 | std # set direction flag\r |
| 59 | _atSym_CopyBytes:\r | |
| 1fef058f | 60 | movq %r8, %rcx\r |
| b1ff428c | 61 | rep movsb # Copy bytes backward\r |
| 62 | cld\r | |
| 1fef058f | 63 | popq %rdi\r |
| 64 | popq %rsi\r | |
| b1ff428c | 65 | ret\r |
| 66 | \r |