Re: [PATCH 3/8] target/arm: Pass env pointer through to gvec_bfdot helper

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

On 7/31/24 02:03, Peter Maydell wrote:
> Pass the env pointer through to the gvec_bfdot helper,
> so we can use it to add support for FEAT_EBF16.
> 
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
>   target/arm/helper.h             |  4 ++--
>   target/arm/tcg/translate-a64.c  | 27 ++++++++++++++++++++++++-
>   target/arm/tcg/translate-neon.c | 35 +++++++++++++++++++++++++++++++--
>   target/arm/tcg/translate-sve.c  | 15 +++++++++++++-
>   target/arm/tcg/vec_helper.c     |  3 ++-
>   5 files changed, 77 insertions(+), 7 deletions(-)
> 
> diff --git a/target/arm/helper.h b/target/arm/helper.h
> index 970d059dec5..aece9fd4aa7 100644
> --- a/target/arm/helper.h
> +++ b/target/arm/helper.h
> @@ -1027,8 +1027,8 @@ DEF_HELPER_FLAGS_5(gvec_ummla_b, TCG_CALL_NO_RWG,
>   DEF_HELPER_FLAGS_5(gvec_usmmla_b, TCG_CALL_NO_RWG,
>                      void, ptr, ptr, ptr, ptr, i32)
>   
> -DEF_HELPER_FLAGS_5(gvec_bfdot, TCG_CALL_NO_RWG,
> -                   void, ptr, ptr, ptr, ptr, i32)
> +DEF_HELPER_FLAGS_6(gvec_bfdot, TCG_CALL_NO_RWG,
> +                   void, ptr, ptr, ptr, ptr, ptr, i32)

Because env expands to TCGv_ptr in the translation context, I suspect that you can use 
that here.  Worth a try, anyway, so that

> -void HELPER(gvec_bfdot)(void *vd, void *vn, void *vm, void *va, uint32_t desc)
> +void HELPER(gvec_bfdot)(void *vd, void *vn, void *vm, void *va,
> +                        void *envp, uint32_t desc)

this doesn't have to use void *.

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


r~