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[PATCH] AVR32: Implement and export __raw_{read,write}s[bwl]

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Implement __raw_readsb and __raw_writesb. Export __raw_reads[bwl]
and __raw_writes[bwl] for use by modules.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Haavard Skinnemoen
2006-10-24 10:12:44 +02:00
committed by Linus Torvalds
parent 065834ab39
commit d68041cc9f
4 changed files with 109 additions and 0 deletions
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52
arch/avr32/lib/io-writesb.S Normal file
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/*
* Copyright (C) 2004-2006 Atmel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
.text
.Lnot_word_aligned:
1: ld.ub r8, r11++
sub r10, 1
st.b r12[0], r8
reteq r12
tst r11, r9
brne 1b
/* fall through */
.global __raw_writesb
.type __raw_writesb,@function
__raw_writesb:
cp.w r10, 0
mov r9, 3
reteq r12
tst r11, r9
brne .Lnot_word_aligned
sub r10, 4
brlt 2f
1: ld.w r8, r11++
bfextu r9, r8, 24, 8
st.b r12[0], r9
bfextu r9, r8, 16, 8
st.b r12[0], r9
bfextu r9, r8, 8, 8
st.b r12[0], r9
st.b r12[0], r8
sub r10, 4
brge 1b
2: sub r10, -4
reteq r12
3: ld.ub r8, r11++
sub r10, 1
st.b r12[0], r8
brne 3b
retal r12