1 ;------------------------------------------------------------------------------
3 ; Copyright (c) 2006, Intel Corporation
4 ; All rights reserved. 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
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.
22 ;------------------------------------------------------------------------------
26 ;------------------------------------------------------------------------------
33 ;------------------------------------------------------------------------------
34 InternalMemSetMem PROC USES rdi
35 mov rdi, rcx ; rdi <- Buffer
36 mov al, r8b ; al <- Value
37 mov r9, rdi ; r9 <- Buffer as return value
40 and rcx, 15 ; rcx + rdi aligns on 16-byte boundary
51 mov ah, al ; ax <- Value repeats twice
52 movdqa [rsp + 10h], xmm0 ; save xmm0
53 movd xmm0, eax ; xmm0[0..16] <- Value repeats twice
54 pshuflw xmm0, xmm0, 0 ; xmm0[0..63] <- Value repeats 8 times
55 movlhps xmm0, xmm0 ; xmm0 <- Value repeats 16 times
57 movntdq [rdi], xmm0 ; rdi should be 16-byte aligned
61 movdqa xmm0, [rsp + 10h] ; restore xmm0
63 mov ecx, edx ; high 32 bits of rcx are always zero
65 mov rax, r9 ; rax <- Return value
67 InternalMemSetMem ENDP