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From: Peter Maydell <peter.maydell@linaro.org>
To: Richard Henderson <richard.henderson@linaro.org>
Cc: qemu-arm <qemu-arm@nongnu.org>, QEMU Developers <qemu-devel@nongnu.org>
Subject: Re: [PATCH 3/3] target/arm: Implement v8.4-RCPC
Date: Mon, 24 Feb 2020 18:42:08 +0000	[thread overview]
Message-ID: <CAFEAcA-zDpucXU0fp+JerfhkOBEaHUZtv=05v_Zxuh0U8XTE_w@mail.gmail.com> (raw)
In-Reply-To: <60d47c82-1c7b-9e75-f4fd-fbf752092a82@linaro.org>

On Mon, 24 Feb 2020 at 18:39, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> On 2/24/20 9:28 AM, Peter Maydell wrote:
> > The v8.4-RCPC extension implements some new instructions:
> >  * LDAPUR, LDAPURB, LDAPURH, LDAPRSB, LDAPRSH, LDAPRSW
> >  * STLUR, STLURB, STLURH
> >
> > These are all in a new subgroup of encodings that sits below the
> > top-level "Loads and Stores" group in the Arm ARM.
> >
> > The STLUR* instructions have standard store-release semantics; the
> > LDAPUR* have Load-AcquirePC semantics, but (as with LDAPR*) we choose
> > to implement them as the slightly stronger Load-Acquire.
> >
> > Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> > ---
> >  target/arm/cpu.h           |  5 +++
> >  linux-user/elfload.c       |  1 +
> >  target/arm/cpu64.c         |  2 +-
> >  target/arm/translate-a64.c | 90 ++++++++++++++++++++++++++++++++++++++
> >  4 files changed, 97 insertions(+), 1 deletion(-)
>
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

I guess your memtag series will need to account for the extra
loads/stores added by this series, incidentally.

thanks
-- PMM


      reply	other threads:[~2020-02-24 18:43 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-24 17:28 [PATCH 0/3] target/arm: Implement v8.3-RCPC and v8.4-RCPC Peter Maydell
2020-02-24 17:28 ` [PATCH 1/3] target/arm: Fix wrong use of FIELD_EX32 on ID_AA64DFR0 Peter Maydell
2020-02-24 17:48   ` Philippe Mathieu-Daudé
2020-02-24 18:23   ` Richard Henderson
2020-02-24 17:28 ` [PATCH 2/3] target/arm: Implement v8.3-RCPC Peter Maydell
2020-02-24 18:31   ` Richard Henderson
2020-02-24 17:28 ` [PATCH 3/3] target/arm: Implement v8.4-RCPC Peter Maydell
2020-02-24 18:39   ` Richard Henderson
2020-02-24 18:42     ` Peter Maydell [this message]

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