Merge branch 'topic/jack-mechanical' into to-push
[linux-2.6] / arch / arm / lib / io-writesl.S
1 /*
2  *  linux/arch/arm/lib/io-writesl.S
3  *
4  *  Copyright (C) 1995-2000 Russell King
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 as
8  * published by the Free Software Foundation.
9  */
10 #include <linux/linkage.h>
11 #include <asm/assembler.h>
12
13 ENTRY(__raw_writesl)
14                 teq     r2, #0          @ do we have to check for the zero len?
15                 moveq   pc, lr
16                 ands    ip, r1, #3
17                 bne     3f
18
19                 subs    r2, r2, #4
20                 bmi     2f
21                 stmfd   sp!, {r4, lr}
22 1:              ldmia   r1!, {r3, r4, ip, lr}
23                 subs    r2, r2, #4
24                 str     r3, [r0, #0]
25                 str     r4, [r0, #0]
26                 str     ip, [r0, #0]
27                 str     lr, [r0, #0]
28                 bpl     1b
29                 ldmfd   sp!, {r4, lr}
30 2:              movs    r2, r2, lsl #31
31                 ldmcsia r1!, {r3, ip}
32                 strcs   r3, [r0, #0]
33                 ldrne   r3, [r1, #0]
34                 strcs   ip, [r0, #0]
35                 strne   r3, [r0, #0]
36                 mov     pc, lr
37
38 3:              bic     r1, r1, #3
39                 ldr     r3, [r1], #4
40                 cmp     ip, #2
41                 blt     5f
42                 bgt     6f
43
44 4:              mov     ip, r3, pull #16
45                 ldr     r3, [r1], #4
46                 subs    r2, r2, #1
47                 orr     ip, ip, r3, push #16
48                 str     ip, [r0]
49                 bne     4b
50                 mov     pc, lr
51
52 5:              mov     ip, r3, pull #8
53                 ldr     r3, [r1], #4
54                 subs    r2, r2, #1
55                 orr     ip, ip, r3, push #24
56                 str     ip, [r0]
57                 bne     5b
58                 mov     pc, lr
59
60 6:              mov     ip, r3, pull #24
61                 ldr     r3, [r1], #4
62                 subs    r2, r2, #1
63                 orr     ip, ip, r3, push #8
64                 str     ip, [r0]
65                 bne     6b
66                 mov     pc, lr
67 ENDPROC(__raw_writesl)