diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm26/lib/io-readsb.S |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/arm26/lib/io-readsb.S')
-rw-r--r-- | arch/arm26/lib/io-readsb.S | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/arch/arm26/lib/io-readsb.S b/arch/arm26/lib/io-readsb.S new file mode 100644 index 000000000000..4c4d99c05856 --- /dev/null +++ b/arch/arm26/lib/io-readsb.S | |||
@@ -0,0 +1,116 @@ | |||
1 | /* | ||
2 | * linux/arch/arm26/lib/io-readsb.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 | #include <asm/hardware.h> | ||
13 | |||
14 | .insb_align: rsb ip, ip, #4 | ||
15 | cmp ip, r2 | ||
16 | movgt ip, r2 | ||
17 | cmp ip, #2 | ||
18 | ldrb r3, [r0] | ||
19 | strb r3, [r1], #1 | ||
20 | ldrgeb r3, [r0] | ||
21 | strgeb r3, [r1], #1 | ||
22 | ldrgtb r3, [r0] | ||
23 | strgtb r3, [r1], #1 | ||
24 | subs r2, r2, ip | ||
25 | bne .insb_aligned | ||
26 | |||
27 | ENTRY(__raw_readsb) | ||
28 | teq r2, #0 @ do we have to check for the zero len? | ||
29 | moveq pc, lr | ||
30 | ands ip, r1, #3 | ||
31 | bne .insb_align | ||
32 | |||
33 | .insb_aligned: stmfd sp!, {r4 - r6, lr} | ||
34 | |||
35 | subs r2, r2, #16 | ||
36 | bmi .insb_no_16 | ||
37 | |||
38 | .insb_16_lp: ldrb r3, [r0] | ||
39 | ldrb r4, [r0] | ||
40 | orr r3, r3, r4, lsl #8 | ||
41 | ldrb r4, [r0] | ||
42 | orr r3, r3, r4, lsl #16 | ||
43 | ldrb r4, [r0] | ||
44 | orr r3, r3, r4, lsl #24 | ||
45 | ldrb r4, [r0] | ||
46 | ldrb r5, [r0] | ||
47 | orr r4, r4, r5, lsl #8 | ||
48 | ldrb r5, [r0] | ||
49 | orr r4, r4, r5, lsl #16 | ||
50 | ldrb r5, [r0] | ||
51 | orr r4, r4, r5, lsl #24 | ||
52 | ldrb r5, [r0] | ||
53 | ldrb r6, [r0] | ||
54 | orr r5, r5, r6, lsl #8 | ||
55 | ldrb r6, [r0] | ||
56 | orr r5, r5, r6, lsl #16 | ||
57 | ldrb r6, [r0] | ||
58 | orr r5, r5, r6, lsl #24 | ||
59 | ldrb r6, [r0] | ||
60 | ldrb ip, [r0] | ||
61 | orr r6, r6, ip, lsl #8 | ||
62 | ldrb ip, [r0] | ||
63 | orr r6, r6, ip, lsl #16 | ||
64 | ldrb ip, [r0] | ||
65 | orr r6, r6, ip, lsl #24 | ||
66 | stmia r1!, {r3 - r6} | ||
67 | |||
68 | subs r2, r2, #16 | ||
69 | bpl .insb_16_lp | ||
70 | |||
71 | tst r2, #15 | ||
72 | LOADREGS(eqfd, sp!, {r4 - r6, pc}) | ||
73 | |||
74 | .insb_no_16: tst r2, #8 | ||
75 | beq .insb_no_8 | ||
76 | |||
77 | ldrb r3, [r0] | ||
78 | ldrb r4, [r0] | ||
79 | orr r3, r3, r4, lsl #8 | ||
80 | ldrb r4, [r0] | ||
81 | orr r3, r3, r4, lsl #16 | ||
82 | ldrb r4, [r0] | ||
83 | orr r3, r3, r4, lsl #24 | ||
84 | ldrb r4, [r0] | ||
85 | ldrb r5, [r0] | ||
86 | orr r4, r4, r5, lsl #8 | ||
87 | ldrb r5, [r0] | ||
88 | orr r4, r4, r5, lsl #16 | ||
89 | ldrb r5, [r0] | ||
90 | orr r4, r4, r5, lsl #24 | ||
91 | stmia r1!, {r3, r4} | ||
92 | |||
93 | .insb_no_8: tst r2, #4 | ||
94 | beq .insb_no_4 | ||
95 | |||
96 | ldrb r3, [r0] | ||
97 | ldrb r4, [r0] | ||
98 | orr r3, r3, r4, lsl #8 | ||
99 | ldrb r4, [r0] | ||
100 | orr r3, r3, r4, lsl #16 | ||
101 | ldrb r4, [r0] | ||
102 | orr r3, r3, r4, lsl #24 | ||
103 | str r3, [r1], #4 | ||
104 | |||
105 | .insb_no_4: ands r2, r2, #3 | ||
106 | LOADREGS(eqfd, sp!, {r4 - r6, pc}) | ||
107 | |||
108 | cmp r2, #2 | ||
109 | ldrb r3, [r0] | ||
110 | strb r3, [r1], #1 | ||
111 | ldrgeb r3, [r0] | ||
112 | strgeb r3, [r1], #1 | ||
113 | ldrgtb r3, [r0] | ||
114 | strgtb r3, [r1] | ||
115 | |||
116 | LOADREGS(fd, sp!, {r4 - r6, pc}) | ||