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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/] [avr32/] [lib/] [findbit.S] - Blame information for rev 3

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/*
 * Copyright (C) 2006 Atmel Corporation
 *
 * 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 
 
        .text
        /*
         * unsigned long find_first_zero_bit(const unsigned long *addr,
         *                                   unsigned long size)
         */
ENTRY(find_first_zero_bit)
        cp.w    r11, 0
        reteq   r11
        mov     r9, r11
1:      ld.w    r8, r12[0]
        com     r8
        brne    .L_found
        sub     r12, -4
        sub     r9, 32
        brgt    1b
        retal   r11
 
        /*
         * unsigned long find_next_zero_bit(const unsigned long *addr,
         *                                  unsigned long size,
         *                                  unsigned long offset)
         */
ENTRY(find_next_zero_bit)
        lsr     r8, r10, 5
        sub     r9, r11, r10
        retle   r11
 
        lsl     r8, 2
        add     r12, r8
        andl    r10, 31, COH
        breq    1f
 
        /* offset is not word-aligned. Handle the first (32 - r10) bits */
        ld.w    r8, r12[0]
        com     r8
        sub     r12, -4
        lsr     r8, r8, r10
        brne    .L_found
 
        /* r9 = r9 - (32 - r10) = r9 + r10 - 32 */
        add     r9, r10
        sub     r9, 32
        retle   r11
 
        /* Main loop. offset must be word-aligned */
1:      ld.w    r8, r12[0]
        com     r8
        brne    .L_found
        sub     r12, -4
        sub     r9, 32
        brgt    1b
        retal   r11
 
        /* Common return path for when a bit is actually found. */
.L_found:
        brev    r8
        clz     r10, r8
        rsub    r9, r11
        add     r10, r9
 
        /* XXX: If we don't have to return exactly "size" when the bit
           is not found, we may drop this "min" thing */
        min     r12, r11, r10
        retal   r12
 
        /*
         * unsigned long find_first_bit(const unsigned long *addr,
         *                              unsigned long size)
         */
ENTRY(find_first_bit)
        cp.w    r11, 0
        reteq   r11
        mov     r9, r11
1:      ld.w    r8, r12[0]
        cp.w    r8, 0
        brne    .L_found
        sub     r12, -4
        sub     r9, 32
        brgt    1b
        retal   r11
 
        /*
         * unsigned long find_next_bit(const unsigned long *addr,
         *                             unsigned long size,
         *                             unsigned long offset)
         */
ENTRY(find_next_bit)
        lsr     r8, r10, 5
        sub     r9, r11, r10
        retle   r11
 
        lsl     r8, 2
        add     r12, r8
        andl    r10, 31, COH
        breq    1f
 
        /* offset is not word-aligned. Handle the first (32 - r10) bits */
        ld.w    r8, r12[0]
        sub     r12, -4
        lsr     r8, r8, r10
        brne    .L_found
 
        /* r9 = r9 - (32 - r10) = r9 + r10 - 32 */
        add     r9, r10
        sub     r9, 32
        retle   r11
 
        /* Main loop. offset must be word-aligned */
1:      ld.w    r8, r12[0]
        cp.w    r8, 0
        brne    .L_found
        sub     r12, -4
        sub     r9, 32
        brgt    1b
        retal   r11
 
ENTRY(generic_find_next_zero_le_bit)
        lsr     r8, r10, 5
        sub     r9, r11, r10
        retle   r11
 
        lsl     r8, 2
        add     r12, r8
        andl    r10, 31, COH
        breq    1f
 
        /* offset is not word-aligned. Handle the first (32 - r10) bits */
        ldswp.w r8, r12[0]
        sub     r12, -4
        com     r8
        lsr     r8, r8, r10
        brne    .L_found
 
        /* r9 = r9 - (32 - r10) = r9 + r10 - 32 */
        add     r9, r10
        sub     r9, 32
        retle   r11
 
        /* Main loop. offset must be word-aligned */
1:      ldswp.w r8, r12[0]
        com     r8
        brne    .L_found
        sub     r12, -4
        sub     r9, 32
        brgt    1b
        retal   r11

Line No.	Rev	Author	Line
1	3	xianfeng	`/*`
2			`* Copyright (C) 2006 Atmel Corporation`
3			`*`
4			`* This program is free software; you can redistribute it and/or modify`
5			`* it under the terms of the GNU General Public License version 2 as`
6			`* published by the Free Software Foundation.`
7			`*/`
8			`#include`
9
10			`.text`
11			`/*`
12			`* unsigned long find_first_zero_bit(const unsigned long *addr,`
13			`* unsigned long size)`
14			`*/`
15			`ENTRY(find_first_zero_bit)`
16			`cp.w r11, 0`
17			`reteq r11`
18			`mov r9, r11`
19			`1: ld.w r8, r12[0]`
20			`com r8`
21			`brne .L_found`
22			`sub r12, -4`
23			`sub r9, 32`
24			`brgt 1b`
25			`retal r11`
26
27			`/*`
28			`* unsigned long find_next_zero_bit(const unsigned long *addr,`
29			`* unsigned long size,`
30			`* unsigned long offset)`
31			`*/`
32			`ENTRY(find_next_zero_bit)`
33			`lsr r8, r10, 5`
34			`sub r9, r11, r10`
35			`retle r11`
36
37			`lsl r8, 2`
38			`add r12, r8`
39			`andl r10, 31, COH`
40			`breq 1f`
41
42			`/* offset is not word-aligned. Handle the first (32 - r10) bits */`
43			`ld.w r8, r12[0]`
44			`com r8`
45			`sub r12, -4`
46			`lsr r8, r8, r10`
47			`brne .L_found`
48
49			`/* r9 = r9 - (32 - r10) = r9 + r10 - 32 */`
50			`add r9, r10`
51			`sub r9, 32`
52			`retle r11`
53
54			`/* Main loop. offset must be word-aligned */`
55			`1: ld.w r8, r12[0]`
56			`com r8`
57			`brne .L_found`
58			`sub r12, -4`
59			`sub r9, 32`
60			`brgt 1b`
61			`retal r11`
62
63			`/* Common return path for when a bit is actually found. */`
64			`.L_found:`
65			`brev r8`
66			`clz r10, r8`
67			`rsub r9, r11`
68			`add r10, r9`
69
70			`/* XXX: If we don't have to return exactly "size" when the bit`
71			`is not found, we may drop this "min" thing */`
72			`min r12, r11, r10`
73			`retal r12`
74
75			`/*`
76			`* unsigned long find_first_bit(const unsigned long *addr,`
77			`* unsigned long size)`
78			`*/`
79			`ENTRY(find_first_bit)`
80			`cp.w r11, 0`
81			`reteq r11`
82			`mov r9, r11`
83			`1: ld.w r8, r12[0]`
84			`cp.w r8, 0`
85			`brne .L_found`
86			`sub r12, -4`
87			`sub r9, 32`
88			`brgt 1b`
89			`retal r11`
90
91			`/*`
92			`* unsigned long find_next_bit(const unsigned long *addr,`
93			`* unsigned long size,`
94			`* unsigned long offset)`
95			`*/`
96			`ENTRY(find_next_bit)`
97			`lsr r8, r10, 5`
98			`sub r9, r11, r10`
99			`retle r11`
100
101			`lsl r8, 2`
102			`add r12, r8`
103			`andl r10, 31, COH`
104			`breq 1f`
105
106			`/* offset is not word-aligned. Handle the first (32 - r10) bits */`
107			`ld.w r8, r12[0]`
108			`sub r12, -4`
109			`lsr r8, r8, r10`
110			`brne .L_found`
111
112			`/* r9 = r9 - (32 - r10) = r9 + r10 - 32 */`
113			`add r9, r10`
114			`sub r9, 32`
115			`retle r11`
116
117			`/* Main loop. offset must be word-aligned */`
118			`1: ld.w r8, r12[0]`
119			`cp.w r8, 0`
120			`brne .L_found`
121			`sub r12, -4`
122			`sub r9, 32`
123			`brgt 1b`
124			`retal r11`
125
126			`ENTRY(generic_find_next_zero_le_bit)`
127			`lsr r8, r10, 5`
128			`sub r9, r11, r10`
129			`retle r11`
130
131			`lsl r8, 2`
132			`add r12, r8`
133			`andl r10, 31, COH`
134			`breq 1f`
135
136			`/* offset is not word-aligned. Handle the first (32 - r10) bits */`
137			`ldswp.w r8, r12[0]`
138			`sub r12, -4`
139			`com r8`
140			`lsr r8, r8, r10`
141			`brne .L_found`
142
143			`/* r9 = r9 - (32 - r10) = r9 + r10 - 32 */`
144			`add r9, r10`
145			`sub r9, 32`
146			`retle r11`
147
148			`/* Main loop. offset must be word-aligned */`
149			`1: ldswp.w r8, r12[0]`
150			`com r8`
151			`brne .L_found`
152			`sub r12, -4`
153			`sub r9, 32`
154			`brgt 1b`
155			`retal r11`

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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/] [avr32/] [lib/] [findbit.S] - Blame information for rev 3