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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [arm/] [lib/] [io-readsl.S] - Blame information for rev 3

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/*
 *  linux/arch/arm/lib/io-readsl.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 
#include 
 
ENTRY(__raw_readsl)
                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:              ldr     r3, [r0, #0]
                ldr     r4, [r0, #0]
                ldr     ip, [r0, #0]
                ldr     lr, [r0, #0]
                subs    r2, r2, #4
                stmia   r1!, {r3, r4, ip, lr}
                bpl     1b
                ldmfd   sp!, {r4, lr}
2:              movs    r2, r2, lsl #31
                ldrcs   r3, [r0, #0]
                ldrcs   ip, [r0, #0]
                stmcsia r1!, {r3, ip}
                ldrne   r3, [r0, #0]
                strne   r3, [r1, #0]
                mov     pc, lr
 
3:              ldr     r3, [r0]
                cmp     ip, #2
                mov     ip, r3, get_byte_0
                strb    ip, [r1], #1
                bgt     6f
                mov     ip, r3, get_byte_1
                strb    ip, [r1], #1
                beq     5f
                mov     ip, r3, get_byte_2
                strb    ip, [r1], #1
 
4:              subs    r2, r2, #1
                mov     ip, r3, pull #24
                ldrne   r3, [r0]
                orrne   ip, ip, r3, push #8
                strne   ip, [r1], #4
                bne     4b
                b       8f
 
5:              subs    r2, r2, #1
                mov     ip, r3, pull #16
                ldrne   r3, [r0]
                orrne   ip, ip, r3, push #16
                strne   ip, [r1], #4
                bne     5b
                b       7f
 
6:              subs    r2, r2, #1
                mov     ip, r3, pull #8
                ldrne   r3, [r0]
                orrne   ip, ip, r3, push #24
                strne   ip, [r1], #4
                bne     6b
 
                mov     r3, ip, get_byte_2
                strb    r3, [r1, #2]
7:              mov     r3, ip, get_byte_1
                strb    r3, [r1, #1]
8:              mov     r3, ip, get_byte_0
                strb    r3, [r1, #0]
                mov     pc, lr

Line No.	Rev	Author	Line
1	3	xianfeng	`/*`
2			`* linux/arch/arm/lib/io-readsl.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`
11			`#include`
12
13			`ENTRY(__raw_readsl)`
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: ldr r3, [r0, #0]`
23			`ldr r4, [r0, #0]`
24			`ldr ip, [r0, #0]`
25			`ldr lr, [r0, #0]`
26			`subs r2, r2, #4`
27			`stmia r1!, {r3, r4, ip, lr}`
28			`bpl 1b`
29			`ldmfd sp!, {r4, lr}`
30			`2: movs r2, r2, lsl #31`
31			`ldrcs r3, [r0, #0]`
32			`ldrcs ip, [r0, #0]`
33			`stmcsia r1!, {r3, ip}`
34			`ldrne r3, [r0, #0]`
35			`strne r3, [r1, #0]`
36			`mov pc, lr`
37
38			`3: ldr r3, [r0]`
39			`cmp ip, #2`
40			`mov ip, r3, get_byte_0`
41			`strb ip, [r1], #1`
42			`bgt 6f`
43			`mov ip, r3, get_byte_1`
44			`strb ip, [r1], #1`
45			`beq 5f`
46			`mov ip, r3, get_byte_2`
47			`strb ip, [r1], #1`
48
49			`4: subs r2, r2, #1`
50			`mov ip, r3, pull #24`
51			`ldrne r3, [r0]`
52			`orrne ip, ip, r3, push #8`
53			`strne ip, [r1], #4`
54			`bne 4b`
55			`b 8f`
56
57			`5: subs r2, r2, #1`
58			`mov ip, r3, pull #16`
59			`ldrne r3, [r0]`
60			`orrne ip, ip, r3, push #16`
61			`strne ip, [r1], #4`
62			`bne 5b`
63			`b 7f`
64
65			`6: subs r2, r2, #1`
66			`mov ip, r3, pull #8`
67			`ldrne r3, [r0]`
68			`orrne ip, ip, r3, push #24`
69			`strne ip, [r1], #4`
70			`bne 6b`
71
72			`mov r3, ip, get_byte_2`
73			`strb r3, [r1, #2]`
74			`7: mov r3, ip, get_byte_1`
75			`strb r3, [r1, #1]`
76			`8: mov r3, ip, get_byte_0`
77			`strb r3, [r1, #0]`
78			`mov pc, lr`

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Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [arm/] [lib/] [io-readsl.S] - Blame information for rev 3