1 ;------------------------------------------------------------------------------
3 ; Copyright (c) 2007, 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 ;------------------------------------------------------------------------------
29 ; OUT VOID *Buffer, --> rcx
30 ; IN UINT8 Value, --> rdx
31 ; IN UINTN Length --> r8
33 ;------------------------------------------------------------------------------
36 cmp r8, 0 ; if Size == 0, do nothing
38 mov rax, rdx ; rdx <-> r8
39 mov rdx, r8 ; rdx <- Length
40 mov r8, rax ; r8 <- Value
42 mov rdi, rcx ; rdi <- Buffer
43 mov al, r8b ; al <- Value
44 mov r9, rdi ; r9 <- Buffer as return value
47 and rcx, 15 ; rcx + rdi aligns on 16-byte boundary
58 mov ah, al ; ax <- Value repeats twice
59 movd xmm0, eax ; xmm0[0..16] <- Value repeats twice
60 pshuflw xmm0, xmm0, 0 ; xmm0[0..63] <- Value repeats 8 times
61 movlhps xmm0, xmm0 ; xmm0 <- Value repeats 16 times
63 movdqa [rdi], xmm0 ; rdi should be 16-byte aligned
67 mov ecx, edx ; high 32 bits of rcx are always zero
69 mov rax, r9 ; rax <- Return value