Re: [PATCH 3/3] target/arm: Implement v8.4-RCPC

[Peter Maydell]

On Mon, 24 Feb 2020 at 18:39, Richard Henderson
<address@hidden> 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 <address@hidden>
> > ---
> >  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 <address@hidden>

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

thanks
-- PMM