Re: FPU precision & signal handlers (bug?)

From: Alan Cox (alan@lxorguk.ukuu.org.uk)
Date: Tue Mar 05 2002 - 19:06:39 EST


> > Think about MMX and hopefully it makes sense then.
>
> AFAIR MMX only mucks with tag and status words (and the exponent fields of
> the stack elements), but never depends on or modifies the control word.

Right but you don't want to end up in MMX mode by suprise in a
signal handler in library code. By the same argument you don't want to end
up in a weird maths more.

I don't think its a bug. I think its correct (but seriously underdocumented)
behaviour
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