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[RTL]: Rtl ByteSwap functions should use intrinsics, isntead of assembly code. This should be merged into trunk!

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svn path=/branches/cmake-bringup/; revision=48425
This commit is contained in:
Sir Richard 2010-08-03 01:56:35 +00:00
parent 3c0baef393
commit 044e663dad
2 changed files with 34 additions and 53 deletions
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53
lib/rtl/i386/rtlswap.S
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@ -1,53 +0,0 @@
/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS Run-Time Library
* PURPOSE: Byte swap functions
* FILE: lib/rtl/i386/rtlswap.S
* PROGRAMER: Alex Ionescu (alex.ionescu@reactos.org)
*/
.intel_syntax noprefix
.globl @RtlUshortByteSwap@4
.globl @RtlUlongByteSwap@4
.globl @RtlUlonglongByteSwap@8
/* FUNCTIONS ***************************************************************/
.func @RtlUshortByteSwap@4, @RtlUshortByteSwap@4
@RtlUshortByteSwap@4:
/* Swap high and low bits */
mov ah, cl
mov al, ch
ret
.endfunc
.func @RtlUlongByteSwap@4, @RtlUlongByteSwap@4
@RtlUlongByteSwap@4:
/* Swap high and low bits */
mov eax, ecx
bswap eax
ret
.endfunc
.func @RtlUlonglongByteSwap@8, @RtlUlonglongByteSwap@8
@RtlUlonglongByteSwap@8:
/* Get 64-bit integer */
mov edx, [esp+8]
mov eax, [esp+4]
/* Swap it */
bswap edx
bswap eax
/* Return it */
mov ecx, eax
mov eax, edx
mov edx, ecx
ret
.endfunc

34
lib/rtl/largeint.c
View file

@ -14,6 +14,40 @@
/* FUNCTIONS *****************************************************************/
#undef RtlUlonglongByteSwap
#undef RtlUlongByteSwap
#undef RtlUshortByteSwap
/*
* @implemented
*/
USHORT
FASTCALL
RtlUshortByteSwap(IN USHORT Source)
{
return _byteswap_ushort(Source);
}
/*
* @implemented
*/
ULONG
FASTCALL
RtlUlongByteSwap(IN ULONG Source)
{
return _byteswap_ulong(Source);
}
/*
* @implemented
*/
ULONGLONG
FASTCALL
RtlUlonglongByteSwap(IN ULONGLONG Source)
{
return _byteswap_uint64(Source);
}
/*
* @implemented
*/