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 ;------------------------------------------------------------------------------
28 ; EfiCommonLibSetMem (
33 ;------------------------------------------------------------------------------
34 EfiCommonLibSetMem PROC USES rdi
35 cmp rdx, 0 ; if Size == 0, do nothing
37 mov rdi, rcx ; rdi <- Buffer
38 mov al, r8b ; al <- Value
41 and rcx, 15 ; rcx + rdi aligns on 16-byte boundary
52 mov ah, al ; ax <- Value repeats twice
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 movdqa [rdi], xmm0 ; rdi should be 16-byte aligned
61 mov ecx, edx ; high 32 bits of rcx are always zero
65 EfiCommonLibSetMem ENDP