From: Claudio Fontana <claudio.fontana@huawei.com>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: Laurent Desnogues <laurent.desnogues@gmail.com>,
Jani Kokkonen <Jani.Kokkonen@huawei.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
Richard Henderson <rth@twiddle.net>
Subject: [Qemu-devel] [PATCH 0/1] TCG Aarch64 ldst 12bit scaled uimm
Date: Tue, 11 Jun 2013 10:11:35 +0200 [thread overview]
Message-ID: <51B6DBB7.2000800@huawei.com> (raw)
Using only the ldst simm9 (unscaled offset) will often result in the
fallback mov immediate + ldst (register offset) to be triggered.
This change implements the ldst uimm12 (scaled offset), which avoids
the expensive fallback in certain conditions: the offset must be
naturally aligned and positive, and the scaled value must be
representable with 12bits.
This patch requires multiple reviewed but not committed yet series
reachable from:
https://lists.gnu.org/archive/html/qemu-devel/2013-06/msg00880.html
"AArch64 TCG target implementation, git repo"
Claudio Fontana (1):
tcg/aarch64: implement ldst 12bit scaled uimm offset
tcg/aarch64/tcg-target.c | 32 +++++++++++++++++++++++++++++---
1 file changed, 29 insertions(+), 3 deletions(-)
--
1.8.1
next reply other threads:[~2013-06-11 8:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-11 8:11 Claudio Fontana [this message]
2013-06-11 8:14 ` [Qemu-devel] [PATCH 1/1] tcg/aarch64: implement ldst 12bit scaled uimm offset Claudio Fontana
2013-06-11 14:02 ` Richard Henderson
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