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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [arch/] [arm/] [lib/] [io-readsw-armv4.S] - Blame information for rev 1765

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/*
 *  linux/arch/arm/lib/io-readsw-armv4.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 
#include 
 
.insw_bad_alignment:
                adr     r0, .insw_bad_align_msg
                mov     r2, lr
                b       SYMBOL_NAME(panic)
.insw_bad_align_msg:
                .asciz  "insw: bad buffer alignment (0x%p, lr=0x%08lX)\n"
                .align
 
.insw_align:    tst     r1, #1
                bne     .insw_bad_alignment
 
                ldrh    r3, [r0]
                strh    r3, [r1], #2
 
                subs    r2, r2, #1
                RETINSTR(moveq, pc, lr)
 
ENTRY(__raw_readsw)
                teq     r2, #0          @ do we have to check for the zero len?
                moveq   pc, lr
                tst     r1, #3
                bne     .insw_align
 
                stmfd   sp!, {r4, r5, lr}
 
                subs    r2, r2, #8
                bmi     .no_insw_8
 
.insw_8_lp:     ldrh    r3, [r0]
                ldrh    r4, [r0]
                orr     r3, r3, r4, lsl #16
 
                ldrh    r4, [r0]
                ldrh    r5, [r0]
                orr     r4, r4, r5, lsl #16
 
                ldrh    r5, [r0]
                ldrh    ip, [r0]
                orr     r5, r5, ip, lsl #16
 
                ldrh    ip, [r0]
                ldrh    lr, [r0]
                orr     ip, ip, lr, lsl #16
 
                stmia   r1!, {r3 - r5, ip}
 
                subs    r2, r2, #8
                bpl     .insw_8_lp
 
                tst     r2, #7
                LOADREGS(eqfd, sp!, {r4, r5, pc})
 
.no_insw_8:     tst     r2, #4
                beq     .no_insw_4
 
                ldrh    r3, [r0]
                ldrh    r4, [r0]
                orr     r3, r3, r4, lsl #16
 
                ldrh    r4, [r0]
                ldrh    ip, [r0]
                orr     r4, r4, ip, lsl #16
 
                stmia   r1!, {r3, r4}
 
.no_insw_4:     tst     r2, #2
                beq     .no_insw_2
 
                ldrh    r3, [r0]
                ldrh    ip, [r0]
                orr     r3, r3, ip, lsl #16
 
                str     r3, [r1], #4
 
.no_insw_2:     tst     r2, #1
                ldrneh  r3, [r0]
                strneh  r3, [r1]
 
                LOADREGS(fd, sp!, {r4, r5, pc})

Line No.	Rev	Author	Line
1	1275	phoenix	`/*`
2			`* linux/arch/arm/lib/io-readsw-armv4.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			`#include`
13
14			`.insw_bad_alignment:`
15			`adr r0, .insw_bad_align_msg`
16			`mov r2, lr`
17			`b SYMBOL_NAME(panic)`
18			`.insw_bad_align_msg:`
19			`.asciz "insw: bad buffer alignment (0x%p, lr=0x%08lX)\n"`
20			`.align`
21
22			`.insw_align: tst r1, #1`
23			`bne .insw_bad_alignment`
24
25			`ldrh r3, [r0]`
26			`strh r3, [r1], #2`
27
28			`subs r2, r2, #1`
29			`RETINSTR(moveq, pc, lr)`
30
31			`ENTRY(__raw_readsw)`
32			`teq r2, #0 @ do we have to check for the zero len?`
33			`moveq pc, lr`
34			`tst r1, #3`
35			`bne .insw_align`
36
37			`stmfd sp!, {r4, r5, lr}`
38
39			`subs r2, r2, #8`
40			`bmi .no_insw_8`
41
42			`.insw_8_lp: ldrh r3, [r0]`
43			`ldrh r4, [r0]`
44			`orr r3, r3, r4, lsl #16`
45
46			`ldrh r4, [r0]`
47			`ldrh r5, [r0]`
48			`orr r4, r4, r5, lsl #16`
49
50			`ldrh r5, [r0]`
51			`ldrh ip, [r0]`
52			`orr r5, r5, ip, lsl #16`
53
54			`ldrh ip, [r0]`
55			`ldrh lr, [r0]`
56			`orr ip, ip, lr, lsl #16`
57
58			`stmia r1!, {r3 - r5, ip}`
59
60			`subs r2, r2, #8`
61			`bpl .insw_8_lp`
62
63			`tst r2, #7`
64			`LOADREGS(eqfd, sp!, {r4, r5, pc})`
65
66			`.no_insw_8: tst r2, #4`
67			`beq .no_insw_4`
68
69			`ldrh r3, [r0]`
70			`ldrh r4, [r0]`
71			`orr r3, r3, r4, lsl #16`
72
73			`ldrh r4, [r0]`
74			`ldrh ip, [r0]`
75			`orr r4, r4, ip, lsl #16`
76
77			`stmia r1!, {r3, r4}`
78
79			`.no_insw_4: tst r2, #2`
80			`beq .no_insw_2`
81
82			`ldrh r3, [r0]`
83			`ldrh ip, [r0]`
84			`orr r3, r3, ip, lsl #16`
85
86			`str r3, [r1], #4`
87
88			`.no_insw_2: tst r2, #1`
89			`ldrneh r3, [r0]`
90			`strneh r3, [r1]`
91
92			`LOADREGS(fd, sp!, {r4, r5, pc})`

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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [arch/] [arm/] [lib/] [io-readsw-armv4.S] - Blame information for rev 1765