| ;------------------------------------------------------------------------------ | |
| ; | |
| ; Copyright (c) 2006, 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: | |
| ; | |
| ; SetMem32.asm | |
| ; | |
| ; Abstract: | |
| ; | |
| ; SetMem32 function | |
| ; | |
| ; Notes: | |
| ; | |
| ;------------------------------------------------------------------------------ | |
| .code | |
| ;------------------------------------------------------------------------------ | |
| ; VOID * | |
| ; InternalMemSetMem32 ( | |
| ; IN VOID *Buffer, | |
| ; IN UINTN Count, | |
| ; IN UINT32 Value | |
| ; ) | |
| ;------------------------------------------------------------------------------ | |
| InternalMemSetMem32 PROC | |
| DB 49h, 0fh, 6eh, 0c0h ; movd mm0, r8 (Value) | |
| mov rax, rcx ; rax <- Buffer | |
| xchg rcx, rdx ; rcx <- Count rdx <- Buffer | |
| shr rcx, 1 ; rcx <- # of qwords to set | |
| jz @SetDwords | |
| DB 0fh, 70h, 0C0h, 44h ; pshufw mm0, mm0, 44h | |
| @@: | |
| DB 0fh, 0e7h, 02h ; movntq [rdx], mm0 | |
| lea rdx, [rdx + 8] ; use "lea" to avoid flag changes | |
| loop @B | |
| mfence | |
| @SetDwords: | |
| jnc @F | |
| DB 0fh, 7eh, 02h ; movd [rdx], mm0 | |
| @@: | |
| ret | |
| InternalMemSetMem32 ENDP | |
| END |