Post-increment constraint in inline assembly (SuperH)

[Oleg Endo]

Hi,

On Sun, 2018-01-28 at 14:32 +0100, Sébastien Michelland wrote:
>Â 
> I am trying to generate a call to the SH-4A unaligned move "movua.l 
> @rm+, r0" instruction. Currently my inline-assembly approach using
> the '>' constraint is rejected by the compiler:

As far as I know, this won't work properly. Â Auto-mod addressing modes
can't be expressed with inline assembly sufficiently. Â The compiler
will not understand it.


> What would be the proper way to generate this instruction?

The only sane thing to do is fixing the compiler. Â The other option is
to cripple all your code and insert movua macros/functions all over the
place.

It's a known issue
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52480

Cheers,
Oleg