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41 lines
882 B
ArmAsm
41 lines
882 B
ArmAsm
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS Run-Time Library
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* PURPOSE: Byte swap functions
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* FILE: lib/rtl/i386/rtlswap.S
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* PROGRAMER: Alex Ionescu (alex.ionescu@reactos.org)
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*/
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.globl RtlUshortByteSwap
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.globl RtlUlongByteSwap
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.globl RtlUlonglongByteSwap
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/* FUNCTIONS ***************************************************************/
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RtlUshortByteSwap:
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/* Swap high and low bits */
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rlwinm 4,3,24,0xff
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rlwinm 5,3,8,0xff00
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or 3,4,5
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blr
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RtlUlongByteSwap:
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rlwinm 4,3,8,0xff
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rlwinm 5,3,24,0xff000000
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or 4,4,5
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rlwinm 5,3,8,0xff0000
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rlwinm 3,3,24,0xff00
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or 3,4,5
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or 3,3,6
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blr
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RtlUlonglongByteSwap:
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stwu 1,16(1)
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stw 4,4(1)
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bl RtlUlongByteSwap
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stw 3,4(1)
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lwz 3,4(1)
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bl RtlUlongByteSwap
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lwz 4,4(1)
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subi 1,1,16
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blr
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