From: Richard Henderson <rth@twiddle.net>
To: Aurelien Jarno <aurelien@aurel32.net>
Cc: Peter Maydell <peter.maydell@linaro.org>,
qemu-devel@nongnu.org, Max Filippov <jcmvbkbc@gmail.com>
Subject: Re: [Qemu-devel] Shifts, ppc[64], xtensa
Date: Wed, 19 Sep 2012 11:01:57 -0700 [thread overview]
Message-ID: <505A0895.8000008@twiddle.net> (raw)
In-Reply-To: <20120919175116.GC29951@hall.aurel32.net>
On 09/19/2012 10:51 AM, Aurelien Jarno wrote:
> That said it is not a valid reason to not keep the value during
> re-translation, as it means the TB will exit instead of linking to
> the next one. The consequences are only the performance.
We still have the problem of when is the goto_tb link initialized the *first* time?
Where we expect the goto_tb to fall through to stuff+exit_tb?
For i386 it's during translation, with no care for re-translation.
For ARM? I can't see that it is.
For PPC, malc has already verified that it *never* happens. If he
puts "trap" insns there instead of "nop" insns, he'll see the trap.
r~
next prev parent reply other threads:[~2012-09-19 18:02 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-18 19:52 [Qemu-devel] Shifts, ppc[64], xtensa malc
2012-09-18 23:20 ` Max Filippov
2012-09-19 12:49 ` malc
2012-09-19 15:00 ` Max Filippov
2012-09-19 0:10 ` Richard Henderson
2012-09-19 12:46 ` malc
2012-09-19 12:57 ` Peter Maydell
2012-09-19 17:00 ` Richard Henderson
2012-09-19 17:02 ` Richard Henderson
2012-09-19 17:11 ` Peter Maydell
2012-09-19 17:30 ` Richard Henderson
2012-09-19 17:51 ` Aurelien Jarno
2012-09-19 18:01 ` Richard Henderson [this message]
2012-09-19 18:30 ` Peter Maydell
2012-09-19 18:35 ` Richard Henderson
2012-09-19 19:53 ` Richard Henderson
2012-09-19 20:05 ` Peter Maydell
2012-09-19 21:21 ` Richard Henderson
2012-09-20 0:29 ` Max Filippov
2012-09-20 14:03 ` Richard Henderson
2012-09-20 14:22 ` Max Filippov
2012-09-20 22:53 ` malc
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