Re: [PATCH 02/20] target/arm: Create decodetree skeleton for A64

[Richard Henderson <richard.henderson@linaro.org>]

On 5/12/23 15:40, Peter Maydell wrote:
> The A64 translator uses a hand-written decoder for everything except
> SVE or SME.  It's fairly well structured, but it's becoming obvious
> that it's still more painful to add instructions to than the A32
> translator, because putting a new instruction into the right place in
> a hand-written decoder is much harder than adding new instruction
> patterns to a decodetree file.
> 
> As the first step in conversion to decodetree, create the skeleton of
> the decodetree decoder; where it does not handle instructions we will
> fall back to the legacy decoder (which will be for everything at the
> moment, since there are no patterns in a64.decode).
> 
> Signed-off-by: Peter Maydell<peter.maydell@linaro.org>
> ---
>   target/arm/tcg/a64.decode      | 20 ++++++++++++++++++++
>   target/arm/tcg/translate-a64.c | 18 +++++++++++-------
>   target/arm/tcg/meson.build     |  1 +
>   3 files changed, 32 insertions(+), 7 deletions(-)
>   create mode 100644 target/arm/tcg/a64.decode

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~