Re: [PATCH 2/2] m68k: introduce a virtual m68k machine

[Josh Juran]

On Apr 28, 2021, at 8:04 AM, Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:

> This can be simplified by shifting irq_pending instead of irq_bit:
> 
>    do {
>            if (irq_pending & 1)
>                    generic_handle_irq(irq_num);
> 
>            ++irq_num;
>            irq_pending >>= 1;
>    } while (irq_pending);
> 
> Unfortunately m68k doesn't have a single-instruction __ffs().

The 68000 and 68010 don't, but couldn't the 68020's BFFFO do the job?

Josh