From:	"Böhme Uwe" <uwe AT hof DOT baynet DOT de>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: _lrotl replacement
Date:	Sat, 25 Jul 1998 19:50:12 +0200
Organization:	Bingo (Buergernetz Ingolstadt eV)
Lines:	24
Message-ID:	<35BA1AD4.8E6F5EEA@hof.baynet.de>
References:	<35b9deda DOT 40014807 AT news DOT deol DOT ru>
NNTP-Posting-Host:	port60.hof.baynet.de
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

> I have some Visual C  C++ sources with  _lrotl  function (cyclic
> rotate left).  Seem it is MS extension to standart C library. Which
> replacement can i use with GCC 2.8.1 ?
>
>         Vladimir

  int _lrotl( int v ) {
     __asm__ __volatile__ (
                     "    movw  %0, %%eax         \n"
                     "    rol $1, %%eax                 \n"
                     "    jo IsDone                         \n"
                     "    or  $1, %%eax                 \n"
                     "IsDone:                                \n"
                     : : "gl" (v)
     );
};

I didn't check that out, so you have to debug it (especially weather the
or operation for the
left out right in by carry flag is working)


Uwe

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