Re: [Qemu-devel] [PATCH RFC v1 01/29] target-arc: initial commit

[Max Filippov]

Hello,

On Tue, Sep 20, 2016 at 4:31 PM, Richard Henderson <address@hidden> wrote:
>> +        if (ctx.npc == env->lpe) {
> You can't look at the contents of ENV during translation.
>
> You'll need to implement this feature similar to how it's done for xtensa.
> See helper_wsr_lbeg, helper_wsr_lend, and gen_check_loop_end.

I think it's fairly expensive solution, as it allows to have only one TB with
zero overhead loop at a time. I'm looking at ways to optimize it,
perhaps recording lbeg in the TB's cs_base.

-- 
Thanks.
-- Max