io-writesl.S
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/*
* linux/arch/arm/lib/io-writesl.S
*
* Copyright (C) 1995-2000 Russell King
*
* 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.
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
ENTRY(__raw_writesl)
teq r2, #0 @ do we have to check for the zero len?
moveq pc, lr
ands ip, r1, #3
bne 3f
subs r2, r2, #4
bmi 2f
stmfd sp!, {r4, lr}
1: ldmia r1!, {r3, r4, ip, lr}
subs r2, r2, #4
str r3, [r0, #0]
str r4, [r0, #0]
str ip, [r0, #0]
str lr, [r0, #0]
bpl 1b
ldmfd sp!, {r4, lr}
2: movs r2, r2, lsl #31
ldmcsia r1!, {r3, ip}
strcs r3, [r0, #0]
ldrne r3, [r1, #0]
strcs ip, [r0, #0]
strne r3, [r0, #0]
mov pc, lr
3: bic r1, r1, #3
ldr r3, [r1], #4
cmp ip, #2
blt 5f
bgt 6f
4: mov ip, r3, pull #16
ldr r3, [r1], #4
subs r2, r2, #1
orr ip, ip, r3, push #16
str ip, [r0]
bne 4b
mov pc, lr
5: mov ip, r3, pull #8
ldr r3, [r1], #4
subs r2, r2, #1
orr ip, ip, r3, push #24
str ip, [r0]
bne 5b
mov pc, lr
6: mov ip, r3, pull #24
ldr r3, [r1], #4
subs r2, r2, #1
orr ip, ip, r3, push #8
str ip, [r0]
bne 6b
mov pc, lr
ENDPROC(__raw_writesl)