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Implemented __swap_int16/32/64() (float/double are missing right now, but should

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be the same as __swap_int32/64()).


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4527 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2003-09-07 17:22:15 +00:00
parent bc981e9a90
commit 7cde8a9d7f
2 changed files with 35 additions and 0 deletions
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2
src/kernel/libroot/os/arch/x86/Jamfile
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@ -2,6 +2,7 @@ SubDir OBOS_TOP src kernel libroot os arch x86 ;
KernelMergeObject os_arch_$(OBOS_ARCH).o :
<$(SOURCE_GRIST)>atomic.S
<$(SOURCE_GRIST)>byteorder.S
<$(SOURCE_GRIST)>cpuid.S
<$(SOURCE_GRIST)>systeminfo.c
<$(SOURCE_GRIST)>system_time.S
@ -13,6 +14,7 @@ KernelMergeObject os_arch_$(OBOS_ARCH).o :
MergeObjectFromObjects kernel_os_arch_$(OBOS_ARCH).o :
<$(SOURCE_GRIST)>atomic.o
<$(SOURCE_GRIST)>byteorder.S
<$(SOURCE_GRIST)>cpuid.o
<$(SOURCE_GRIST)>system_time.o
;

33
src/kernel/libroot/os/arch/x86/byteorder.S Normal file
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@ -0,0 +1,33 @@
/*
** 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
/* uint16 __swap_int16(uint16 value) */
FUNCTION(__swap_int16):
movl 4(%esp), %eax
bswap %eax
shr $16, %eax
ret
/* uint32 __swap_int32(uint32 value) */
FUNCTION(__swap_int32):
movl 4(%esp), %eax
bswap %eax
ret
/* uint64 __swap_int64(uint64 value) */
FUNCTION(__swap_int64):
movl 4(%esp), %edx /* the 32-bits registers are swapped here */
movl 8(%esp), %eax
bswap %eax
bswap %edx
ret
/* float __swap_float(float value) */
/* double __swap_double(double value) */