blob: 9b5aa95d069b2a72bccb413f6d0ff69a563a7818 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* insl_sw.S: input array of 4b words from device port with byte swapping
2 *
3 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12
13 .text
14 .p2align 4
15
16###############################################################################
17#
18# void __insl_sw(unsigned int port, void *buf, int n)
19#
20###############################################################################
21 .globl __insl_sw
22 .type __insl_sw,@function
23__insl_sw:
24 subi.p gr9,#1,gr9
25 setlos #1,gr4
260:
27 ldi.p @(gr8,#0),gr5 ; get 0xAABBCCDD
28 subicc gr10,#1,gr10,icc0
29
30 stbu.p gr5,@(gr9,gr4) ; write 0xDD
31 srli gr5,#8,gr5
32 stbu.p gr5,@(gr9,gr4) ; write 0xCC
33 srli gr5,#8,gr5
34 stbu.p gr5,@(gr9,gr4) ; write 0xBB
35 srli gr5,#8,gr5
36 stbu.p gr5,@(gr9,gr4) ; write 0xAA
37 bhi icc0,#2,0b
38 bralr
39
40 .size __insl_sw, .-__insl_sw