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;------------------------------------------------------------------------------ 34InternalMemSetMem32 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 51InternalMemSetMem32 ENDP 52 53 END 54