From: Peter Maydell <peter.maydell@linaro.org>
To: qemu-devel@nongnu.org
Cc: patches@linaro.org
Subject: Re: [Qemu-devel] [PATCH] target-arm: Move VLD/VST multiple into helper functions
Date: Mon, 2 May 2011 17:01:24 +0100 [thread overview]
Message-ID: <BANLkTim8rz4EuWKGm0Bqc5yG03sMho21Kw@mail.gmail.com> (raw)
In-Reply-To: <1303311120-3424-1-git-send-email-peter.maydell@linaro.org>
On 20 April 2011 15:52, Peter Maydell <peter.maydell@linaro.org> wrote:
> Move VLD/VST multiple into helper functions, as some cases can
> generate more TCG ops than the maximum per-instruction limit
> and certainly more than the recommended 20.
I've had a review comment in private email that this patch
slows down ffmpeg by a little over 4% (in a linux-user execution
run where about 5% of instructions were an affected vld/vst). So
perhaps the right approach is to increase the max-ops-per-insn limit
and update the guidance in tcg/README instead?
-- PMM
next prev parent reply other threads:[~2011-05-02 16:01 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-20 14:52 [Qemu-devel] [PATCH] target-arm: Move VLD/VST multiple into helper functions Peter Maydell
2011-04-28 11:31 ` Peter Maydell
2011-05-02 16:01 ` Peter Maydell [this message]
2011-06-03 20:47 ` Aurelien Jarno
2011-06-04 10:01 ` Peter Maydell
2011-06-06 7:18 ` riku voipio
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