diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/lib/io-writesw-armv4.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/arm/lib/io-writesw-armv4.S')
-rw-r--r-- | arch/arm/lib/io-writesw-armv4.S | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/arch/arm/lib/io-writesw-armv4.S b/arch/arm/lib/io-writesw-armv4.S new file mode 100644 index 000000000000..6d1d7c27806e --- /dev/null +++ b/arch/arm/lib/io-writesw-armv4.S | |||
@@ -0,0 +1,95 @@ | |||
1 | /* | ||
2 | * linux/arch/arm/lib/io-writesw-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 <linux/linkage.h> | ||
11 | #include <asm/assembler.h> | ||
12 | |||
13 | .macro outword, rd | ||
14 | #ifndef __ARMEB__ | ||
15 | strh \rd, [r0] | ||
16 | mov \rd, \rd, lsr #16 | ||
17 | strh \rd, [r0] | ||
18 | #else | ||
19 | mov lr, \rd, lsr #16 | ||
20 | strh lr, [r0] | ||
21 | strh \rd, [r0] | ||
22 | #endif | ||
23 | .endm | ||
24 | |||
25 | .outsw_align: movs ip, r1, lsl #31 | ||
26 | bne .outsw_noalign | ||
27 | |||
28 | ldrh r3, [r1], #2 | ||
29 | sub r2, r2, #1 | ||
30 | strh r3, [r0] | ||
31 | |||
32 | ENTRY(__raw_writesw) | ||
33 | teq r2, #0 | ||
34 | moveq pc, lr | ||
35 | ands r3, r1, #3 | ||
36 | bne .outsw_align | ||
37 | |||
38 | stmfd sp!, {r4, r5, lr} | ||
39 | |||
40 | subs r2, r2, #8 | ||
41 | bmi .no_outsw_8 | ||
42 | |||
43 | .outsw_8_lp: ldmia r1!, {r3, r4, r5, ip} | ||
44 | subs r2, r2, #8 | ||
45 | outword r3 | ||
46 | outword r4 | ||
47 | outword r5 | ||
48 | outword ip | ||
49 | bpl .outsw_8_lp | ||
50 | |||
51 | .no_outsw_8: tst r2, #4 | ||
52 | beq .no_outsw_4 | ||
53 | |||
54 | ldmia r1!, {r3, ip} | ||
55 | outword r3 | ||
56 | outword ip | ||
57 | |||
58 | .no_outsw_4: movs r2, r2, lsl #31 | ||
59 | bcc .no_outsw_2 | ||
60 | |||
61 | ldr r3, [r1], #4 | ||
62 | outword r3 | ||
63 | |||
64 | .no_outsw_2: ldrneh r3, [r1] | ||
65 | strneh r3, [r0] | ||
66 | |||
67 | ldmfd sp!, {r4, r5, pc} | ||
68 | |||
69 | #ifdef __ARMEB__ | ||
70 | #define pull_hbyte0 lsl #8 | ||
71 | #define push_hbyte1 lsr #24 | ||
72 | #else | ||
73 | #define pull_hbyte0 lsr #24 | ||
74 | #define push_hbyte1 lsl #8 | ||
75 | #endif | ||
76 | |||
77 | .outsw_noalign: ldr r3, [r1, -r3]! | ||
78 | subcs r2, r2, #1 | ||
79 | bcs 2f | ||
80 | subs r2, r2, #2 | ||
81 | bmi 3f | ||
82 | |||
83 | 1: mov ip, r3, lsr #8 | ||
84 | strh ip, [r0] | ||
85 | 2: mov ip, r3, pull_hbyte0 | ||
86 | ldr r3, [r1, #4]! | ||
87 | subs r2, r2, #2 | ||
88 | orr ip, ip, r3, push_hbyte1 | ||
89 | strh ip, [r0] | ||
90 | bpl 2b | ||
91 | |||
92 | 3: tst r2, #1 | ||
93 | 2: movne ip, r3, lsr #8 | ||
94 | strneh ip, [r0] | ||
95 | mov pc, lr | ||