1 ;------------------------------------------------------------------------------ 2 ; 3 ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR> 4 ; This program and the accompanying materials 5 ; are licensed and made available under the terms and conditions of the BSD License 6 ; which accompanies this distribution. The full text of the license may be found at 7 ; http://opensource.org/licenses/bsd-license.php. 8 ; 9 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11 ; 12 ; Module Name: 13 ; 14 ; SetMem32.asm 15 ; 16 ; Abstract: 17 ; 18 ; SetMem32 function 19 ; 20 ; Notes: 21 ; 22 ;------------------------------------------------------------------------------ 23 24 .code 25 26 ;------------------------------------------------------------------------------ 27 ; VOID * 28 ; InternalMemSetMem32 ( 29 ; IN VOID *Buffer, 30 ; IN UINTN Count, 31 ; IN UINT32 Value 32 ; ) 33 ;------------------------------------------------------------------------------ 34 InternalMemSetMem32 PROC 35 DB 49h, 0fh, 6eh, 0c0h ; movd mm0, r8 (Value) 36 mov rax, rcx ; rax <- Buffer 37 xchg rcx, rdx ; rcx <- Count rdx <- Buffer 38 shr rcx, 1 ; rcx <- # of qwords to set 39 jz @SetDwords 40 DB 0fh, 70h, 0C0h, 44h ; pshufw mm0, mm0, 44h 41 @@: 42 DB 0fh, 0e7h, 02h ; movntq [rdx], mm0 43 lea rdx, [rdx + 8] ; use "lea" to avoid flag changes 44 loop @B 45 mfence 46 @SetDwords: 47 jnc @F 48 DB 0fh, 7eh, 02h ; movd [rdx], mm0 49 @@: 50 ret 51 InternalMemSetMem32 ENDP 52 53 END 54
