Message-ID: <B0000078378@stargate.astr.lu.lv>
From: "Andris Pavenis" <pavenis AT lanet DOT lv>
To: "Andrew Crabtree" <andrew_crabtree AT hp DOT com>, djgpp-workers AT delorie DOT com
Date: Thu, 4 Mar 1999 11:33:36 +0200
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Subject: RE: egcs-1.1.X   (Was: Re: Problems with collect2 in egcs-1.1.1 and 1.1.2preX)
In-reply-to: <003d01be65bf$370efa80$6dd22b0f@ros51675cra.rose.hp.com>
References: <36DDA6AB DOT F06CDFDE AT cartsys DOT com>
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Reply-To: djgpp-workers AT delorie DOT com

On 3 Mar 99, at 13:45, Andrew Crabtree wrote:

> 
> >  I don't have a Pentium manual here
> I do
> 
> > to check but AFAIK only a few instructions were added between 386
> > and Pentium, and I doubt GCC generates any of them:
> Correct, but there is one I would be worried about.  Bswap was added to the
> 486 and gcc can and will generate it.
> 

Well I searched contents of gcc/config/i386 for such instructions (except
cpuid and rdtsc as I don't expect gcc to generate them). None was found.
I tested it for egcs-1.1.2-pre2. Maybe pgcc generates such instructions but
plain egcs should not do that.

Andris

> New Pentium Instructions
> 
> CMPXCHG8
> CPUID
> RDTSC
> 
> (also new control reguster instructions)
> 
> New 486 Instructions
> 
> BSWAP
> XADD
> CMPXCHG
> 
>