Re: [PATCH 05/10] target/arm: Don't allow BLX imm for M-profile

[Richard Henderson]

On 10/12/20 8:37 AM, Peter Maydell wrote:
> The BLX immediate insn in the Thumb encoding always performs
> a switch from Thumb to Arm state. This would be totally useless
> in M-profile which has no Arm decoder, and so the instruction
> does not exist at all there. Make the encoding UNDEF for M-profile.
> 
> (This part of the encoding space is used for the branch-future
> and low-overhead-loop insns in v8.1M.)
> 
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
>  target/arm/translate.c | 8 ++++++++
>  1 file changed, 8 insertions(+)

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


r~