projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 053a51bd JJ |
1 | ;------------------------------------------------------------------------------\r |
| 2 | ;\r | |
| 3 | ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>\r | |
| 4 | ; This program and the accompanying materials\r | |
| 5 | ; are licensed and made available under the terms and conditions of the BSD License\r | |
| 6 | ; which accompanies this distribution. The full text of the license may be found at\r | |
| 7 | ; http://opensource.org/licenses/bsd-license.php.\r | |
| 8 | ;\r | |
| 9 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 10 | ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 11 | ;\r | |
| 12 | ; Module Name:\r | |
| 13 | ;\r | |
| 14 | ; ZeroMem.Asm\r | |
| 15 | ;\r | |
| 16 | ; Abstract:\r | |
| 17 | ;\r | |
| 18 | ; ZeroMem function\r | |
| 19 | ;\r | |
| 20 | ; Notes:\r | |
| 21 | ;\r | |
| 22 | ;------------------------------------------------------------------------------\r | |
| 23 | \r | |
| 24 | DEFAULT REL\r | |
| 25 | SECTION .text\r | |
| 26 | \r | |
| 27 | ;------------------------------------------------------------------------------\r | |
| 28 | ; VOID *\r | |
| 29 | ; InternalMemZeroMem (\r | |
| 30 | ; IN VOID *Buffer,\r | |
| 31 | ; IN UINTN Count\r | |
| 32 | ; );\r | |
| 33 | ;------------------------------------------------------------------------------\r | |
| 34 | global ASM_PFX(InternalMemZeroMem)\r | |
| 35 | ASM_PFX(InternalMemZeroMem):\r | |
| 36 | push rdi\r | |
| 37 | push rcx ; push Buffer\r | |
| 38 | xor rax, rax ; rax = 0\r | |
| 39 | mov rdi, rcx ; rdi = Buffer\r | |
| 40 | mov rcx, rdx ; rcx = Count\r | |
| 41 | shr rcx, 3 ; rcx = rcx / 8\r | |
| 42 | and rdx, 7 ; rdx = rdx & 7\r | |
| 43 | cld\r | |
| 44 | rep stosq\r | |
| 45 | mov rcx, rdx ; rcx = rdx\r | |
| 46 | rep stosb\r | |
| 47 | pop rax ; rax = Buffer\r | |
| 48 | pop rdi\r | |
| 49 | ret\r | |
| 50 | \r |