On Tue, Feb 28, 2017 at 04:34:20PM +0100, Uros Bizjak wrote:
> > Have you tried to build say Linux kernel or firefox or similar large
> > codebase with lots of inline asm with that?
>
> No...
>
> > What constraint should people use for long long vars in 32-bit code?
> > "A" constraint is used a lot in 32-bit code (say for inline asm with
> > rdtsc), but what if you need more than one long long input?
>
> Hm, we don't guarantee DImode register pairs other that "A"
> constraint. But you are right, we have to allow "A" for 64bit eax/edx
> pair.
>
> Please consider the 64bit warning part dropped.
The 8-bit error is fine, unless the operand isn't used, it would hopefully
fail to assemble anyway.
Jakub
