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Re: [PATCH 3/3] target/arm: Implement v8.4-RCPC
From: |
Richard Henderson |
Subject: |
Re: [PATCH 3/3] target/arm: Implement v8.4-RCPC |
Date: |
Mon, 24 Feb 2020 10:39:49 -0800 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 |
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>
r~