Re: kernel-2.6 cvs patches

Oliver Schwartz <[email protected]>
Newsgroups gmane.linux.ports.xbox.devel
Message-ID <[email protected]>
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Hi,

> This had to bite sooner or later [1].

Ouch.

> drivers/video/xbox/{conexant,focus}.c make heavy use of
> floating-point arithmetic, which, in-kernel, is a Bad Idea (tm). 

Can you give more information / links? Is there no safe way at all to 
use fixed point arithmetics in kernel?

> I  
> don't know how much accuracy is lost by switching to fixed-point
> arithmetic, perhaps Oliver can answer that. In any case, this needs
> to be fixed [2].

I guess the conexant part would need a major rewrite if it has to use 
fixed point arithmetic. Not that it would be a bad idea, but it will 
definitely be a time-consuming task. 

For the time being we definitely need a workaround, but I'd like to 
know if any other problems may occur when removing -msoft-float 
again.

> Standard CFLAGS for i386 is "-pipe -msoft-float". A quick
> work-around would be to revert ChangeSet 1.1634 in [1] below. Ick.
>
> 	Arthur
>
>
> [1] http://linux.bkbits.net:8080/linux-2.5/[email protected]
> [2] http://www.uwsg.iu.edu/hypermail/linux/kernel/0401.0/1789.html
> [3] http://www.uwsg.iu.edu/hypermail/linux/kernel/0310.1/1178.html

/Oliver
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