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/arm/lib/testsetbit.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/testsetbit.S')
-rw-r--r-- | arch/arm/lib/testsetbit.S | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/arm/lib/testsetbit.S b/arch/arm/lib/testsetbit.S new file mode 100644 index 000000000000..a570fc74cddd --- /dev/null +++ b/arch/arm/lib/testsetbit.S | |||
@@ -0,0 +1,29 @@ | |||
1 | /* | ||
2 | * linux/arch/arm/lib/testsetbit.S | ||
3 | * | ||
4 | * Copyright (C) 1995-1996 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 | .text | ||
13 | |||
14 | ENTRY(_test_and_set_bit_be) | ||
15 | eor r0, r0, #0x18 @ big endian byte ordering | ||
16 | ENTRY(_test_and_set_bit_le) | ||
17 | add r1, r1, r0, lsr #3 @ Get byte offset | ||
18 | and r3, r0, #7 @ Get bit offset | ||
19 | mov r0, #1 | ||
20 | save_and_disable_irqs ip, r2 | ||
21 | ldrb r2, [r1] | ||
22 | tst r2, r0, lsl r3 | ||
23 | orr r2, r2, r0, lsl r3 | ||
24 | strb r2, [r1] | ||
25 | restore_irqs ip | ||
26 | moveq r0, #0 | ||
27 | RETINSTR(mov,pc,lr) | ||
28 | |||
29 | |||