mirror of
https://github.com/ApfelTeeSaft/reactos.git
synced 2026-09-01 12:23:29 +00:00
Timo Kreuzer
d0d304b342
On x86 builds use the asm versions of the byte swap functions. This is neccessary for RtlUlonglongByteswap, because the function breaks the calling convention on Windows, not cleaning up the stack. Make the asm compatible to ML and improve it a bit. Investigated by Thomas Faber. svn path=/trunk/; revision=54097
97 lines
1.9 KiB
C
97 lines
1.9 KiB
C
/* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS system libraries
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* FILE: lib/rtl/mem.c
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* PURPOSE: Memory functions
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* PROGRAMMER: David Welch ([email protected])
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*/
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/* INCLUDES *****************************************************************/
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#include <rtl.h>
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#define NDEBUG
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#include <debug.h>
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#if defined(_M_IX86)
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/* RtlUlonglongByteSwap is broken and cannot be done in C on x86 */
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#error "Use rtlswap.S!"
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#endif
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#undef RtlUlonglongByteSwap
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#undef RtlUlongByteSwap
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#undef RtlUshortByteSwap
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/*************************************************************************
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* RtlUshortByteSwap
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*
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* Swap the bytes of an unsigned short value.
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*
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* NOTES
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* Based on the inline versions in Wine winternl.h
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*
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* @implemented
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*/
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USHORT
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FASTCALL
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RtlUshortByteSwap(
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IN USHORT Source)
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{
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#if defined(_M_AMD64)
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return _byteswap_ushort(Source);
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#else
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return (Source >> 8) | (Source << 8);
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#endif
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}
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/*************************************************************************
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* RtlUlongByteSwap [NTDLL.@]
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*
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* Swap the bytes of an unsigned int value.
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*
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* NOTES
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* Based on the inline versions in Wine winternl.h
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*
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* @implemented
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*/
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ULONG
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FASTCALL
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RtlUlongByteSwap(
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IN ULONG Source)
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{
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#if defined(_M_AMD64)
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return _byteswap_ulong(Source);
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#else
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return ((ULONG)RtlUshortByteSwap((USHORT)Source) << 16) | RtlUshortByteSwap((USHORT)(Source >> 16));
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#endif
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}
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/*************************************************************************
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* RtlUlonglongByteSwap
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*
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* Swap the bytes of an unsigned long long value.
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*
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* PARAMS
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* i [I] Value to swap bytes of
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*
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* RETURNS
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* The value with its bytes swapped.
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*
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* @implemented
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*/
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ULONGLONG FASTCALL
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RtlUlonglongByteSwap(
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IN ULONGLONG Source)
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{
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#if defined(_M_AMD64)
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return _byteswap_uint64(Source);
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#else
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return ((ULONGLONG) RtlUlongByteSwap (Source) << 32) | RtlUlongByteSwap (Source>>32);
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#endif
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}
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/* EOF */
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