d68041cc9f
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>
53 lines
808 B
ArmAsm
53 lines
808 B
ArmAsm
/*
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* Copyright (C) 2004-2006 Atmel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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.text
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.Lnot_word_aligned:
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1: ld.ub r8, r11++
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sub r10, 1
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st.b r12[0], r8
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reteq r12
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tst r11, r9
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brne 1b
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/* fall through */
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.global __raw_writesb
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.type __raw_writesb,@function
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__raw_writesb:
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cp.w r10, 0
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mov r9, 3
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reteq r12
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tst r11, r9
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brne .Lnot_word_aligned
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sub r10, 4
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brlt 2f
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1: ld.w r8, r11++
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bfextu r9, r8, 24, 8
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st.b r12[0], r9
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bfextu r9, r8, 16, 8
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st.b r12[0], r9
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bfextu r9, r8, 8, 8
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st.b r12[0], r9
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st.b r12[0], r8
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sub r10, 4
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brge 1b
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2: sub r10, -4
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reteq r12
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3: ld.ub r8, r11++
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sub r10, 1
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st.b r12[0], r8
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brne 3b
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retal r12
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