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Implemented PPC optimized byte order functions, and added them to the build.

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4665 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2003-09-13 00:02:54 +00:00
parent 75352278ce
commit a7091d52fa
2 changed files with 45 additions and 0 deletions
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2
src/kernel/libroot/os/arch/ppc/Jamfile
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@ -2,6 +2,7 @@ SubDir OBOS_TOP src kernel libroot os arch ppc ;
KernelMergeObject os_arch_$(OBOS_ARCH).o :
<$(SOURCE_GRIST)>atomic.S
<$(SOURCE_GRIST)>byteorder.S
# <$(SOURCE_GRIST)>systeminfo.c
<$(SOURCE_GRIST)>system_time.S
<$(SOURCE_GRIST)>tls.c
@ -11,5 +12,6 @@ KernelMergeObject os_arch_$(OBOS_ARCH).o :
MergeObjectFromObjects kernel_os_arch_$(OBOS_ARCH).o :
<$(SOURCE_GRIST)>atomic.o
<$(SOURCE_GRIST)>byteorder.o
<$(SOURCE_GRIST)>system_time.o
;

43
src/kernel/libroot/os/arch/ppc/byteorder.S Normal file
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@ -0,0 +1,43 @@
/*
** Copyright 2003, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
** Distributed under the terms of the OpenBeOS License.
*/
#define FUNCTION(x) .global x; .type x,@function; x
.text
/* uint16 __swap_int16(uint16 value)
* r3
*/
FUNCTION(__swap_int16):
rlwinm %r4, %r3, 8, 16, 23 // byte 4 -> byte 3 (clear other bits)
rlwimi %r4, %r3, 24, 24, 31 // byte 3 -> byte 4 (copy into)
mr %r3, %r4 // copy to result register
blr
/* uint32 __swap_int32(uint32 value)
* r3
*/
FUNCTION(__swap_int32):
rlwinm %r4, %r3, 24, 0, 31 // byte 4 to 1, byte 2 to 3
rlwimi %r4, %r3, 8, 8, 15 // byte 3 to 2
rlwimi %r4, %r3, 8, 24, 31 // byte 1 to 4
mr %r3, %r4
blr
/* uint64 __swap_int64(uint64 value)
* r3/r4
*/
FUNCTION(__swap_int64):
rlwinm %r5, %r3, 24, 0, 31 // byte 4 to 5, byte 2 to 7
rlwimi %r5, %r3, 8, 8, 15 // byte 3 to 6
rlwimi %r5, %r3, 8, 24, 31 // byte 1 to 8
rlwinm %r3, %r4, 24, 0, 31 // byte 8 to 1, byte 6 to 3
rlwimi %r3, %r4, 8, 8, 15 // byte 7 to 2
rlwimi %r3, %r4, 8, 24, 31 // byte 5 to 4
mr %r4, %r5 // copy lower 32 bits
blr