From: malc <av1474@comtv.ru>
To: Fabrice Bellard <fabrice@bellard.org>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [4715] Emit trampolines manually in prologue
Date: Tue, 10 Jun 2008 03:50:43 +0400 (MSD) [thread overview]
Message-ID: <Pine.LNX.4.64.0806100347070.23608@linmac.oyster.ru> (raw)
In-Reply-To: <484D9188.10500@bellard.org>
On Mon, 9 Jun 2008, Fabrice Bellard wrote:
> This code is too complicated. Please remove it and just call an helper
> to do the division if you really need it. The division is a slow
> operation so no optimization is needed at this point.
The only optimization that there was is a check to see whether dividend
fits to 32 bit and a branch to simple division, everything else was there
to actually call the helper and save callee clobbered registers (since
main TCG proper is oblivious of the call and can't do it for me).
Perhaps there's some other mechanism to easily call helpers from with
the TCG target?
> Moreover, as I said previously there is no point in implementing divu[2]
> as no QEMU target directly needs it.
Yes, it's gone now.
--
mailto:av1474@comtv.ru
prev parent reply other threads:[~2008-06-09 23:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-09 19:57 [Qemu-devel] [4715] Emit trampolines manually in prologue malc
2008-06-09 20:24 ` Fabrice Bellard
2008-06-09 23:50 ` malc [this message]
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