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[ARM]

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- fixed copyright,
- added a naive armv5 implementation for __swap_int{16,32}.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32294 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
François Revol 2009-08-13 04:32:05 +00:00
parent 68b6dce107
commit f4e0ad68b3
1 changed files with 19 additions and 3 deletions
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22
src/system/libroot/os/arch/arm/byteorder.S
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@ -1,7 +1,7 @@
/*
** Copyright 2003, Axel D<EFBFBD>fler, axeld@pinc-software.de. All rights reserved.
** Distributed under the terms of the OpenBeOS License.
*/
* Copyright 2009, Johannes Wischert. All rights reserved.
* Distributed under the terms of the MIT License.
*/
#include <asm_defs.h>
@ -14,7 +14,13 @@ FUNCTION(__swap_int16):
rev16 r0,r0;
#else
#warning IMPLEMENT_ME
and r1,r0,#0x000000ff
and r2,r0,#0x0000ff00
mov r1,r1,LSL #8
mov r2,r2,ROR #8
orr r0,r1,r2
#endif
mov pc,lr
FUNCTION_END(__swap_int16)
/* uint32 __swap_int32(uint32 value)
@ -24,7 +30,16 @@ FUNCTION(__swap_int32):
rev r0,r0;
#else
#warning IMPLEMENT_ME
mov r3,#0xff000000
orr r3,#0x0000ff00
and r1,r0,r3
mov r1,r1,ROR #24
mov r3,r3,ROR #8
and r2,r0,r3
mov r2,r2,ROR #8
orr r0,r1,r2
#endif
mov pc,lr
FUNCTION_END(__swap_int32)
/* uint64 __swap_int64(uint64 value)
@ -39,6 +54,7 @@ FUNCTION(__swap_int64):
#else
#warning IMPLEMENT_ME
#endif
mov pc,lr
FUNCTION_END(__swap_int64)
/* TODO: The following functions can surely be optimized. A simple optimization