https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106743
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The inline-asm is wrong.
It should be:
__asm__("xchgb %b0, %h0 ## %0 " : "=Q"(__tmp) : "0"(__tmp));
q
Any register accessible as rl. In 32-bit mode, a, b, c, and d; in 64-bit mode,
any integer register.
Q
Any register accessible as rh: a, b, c, and d.
Because you are accessing it as rh so you need to Q rather than q.
