Re: -mno-sse and -mno-sse2 broken on opteron?

[Marcin Dalecki <martin at dalecki dot de>]

On 2005-01-07, at 14:29, Dave Korn wrote:
>   It's also a major issue for ppc platforms.  Saving and restoring all 
> those
> altivec registers is a BIG hit and absolutely not something you want 
> to do in
> low-latency-high-priority interrupt handlers, or indeed as part of 
> your standard
> syscall entry sequence, if you can possibly avoid it.
>
> > On architectures where gcc has chosen to use FP registers
> > to optimize integer operations, RTEMS has in fact had to
> > treat the FP as part of the integer context.

As far as I can see the linux-2.6 kernel already does the lazy trick 
only
on the i387 registers for AMD64.