Re: [PATCH v2 10/12] target/arm: Optimize MVE VSHLL and VMOVL

[Richard Henderson]

On 9/13/21 2:54 AM, Peter Maydell wrote:
> Optimize the MVE VSHLL insns by using TCG vector ops when possible.
> This includes the VMOVL insn, which we handle in mve.decode as "VSHLL
> with zero shift count".
>
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
> The cases here that I've implemented with ANDI then shift
> could also be implemented as shift-then-shift. Is one better
> than another?

I would expect and + shift to be preferred over shift + shift.

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


r~