From: Richard Henderson <rth@twiddle.net>
To: Laurent Desnogues <laurent.desnogues@gmail.com>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] target-alpha: An approach to fp insn qualifiers
Date: Mon, 14 Dec 2009 14:21:53 -0800 [thread overview]
Message-ID: <4B26BA81.6030705@twiddle.net> (raw)
In-Reply-To: <761ea48b0912141211keb5bbben584d7fe76f44d78c@mail.gmail.com>
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~
next prev parent reply other threads:[~2009-12-14 22:21 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-14 18:02 [Qemu-devel] target-alpha: An approach to fp insn qualifiers Richard Henderson
2009-12-14 20:11 ` Laurent Desnogues
2009-12-14 22:21 ` Richard Henderson [this message]
2009-12-15 0:31 ` Richard Henderson
2009-12-15 3:50 ` Richard Henderson
2009-12-15 11:31 ` Laurent Desnogues
2009-12-15 16:17 ` Richard Henderson
2009-12-15 17:32 ` Vince Weaver
2009-12-17 17:18 ` Vince Weaver
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