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Subject: Re: [Qemu-devel] target-alpha: An approach to fp insn qualifiers
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To: Laurent Desnogues <laurent.desnogues@gmail.com>
Cc: qemu-devel@nongnu.org

On 12/14/2009 12:11 PM, Laurent Desnogues wrote:
> I don't really like passing parts of opcodes to helpers, but as you say
> that prevents explosion of helpers.  OTOH you could do lazy calls to
> helpers that set rounding modes with my approach of separating them
> from computation.

I don't particularly like it either, I just thought it was a bit
more efficient, given the current state of TCG.

If it's not acceptable, I can try to do some macro magic in both
op_helper.c and helper.h to do function replication on the /u,/su,/sui
bits and then follow your lead on the lazy rounding mode setting.

> Can you give SPECint 2K equake a try? The symptom was the presence
> of many NaN's.  If you don't have access to SPEC2K I'll try it.

Yes, I can.  I'll see about setting this up tonight.


r~