> We probably want to do some nop'ish thing here which will yield the
> cpu thread on Niagara cpus, I'd recommend something along the lines of
> "rd %ccr, %g0" or "rd %y, %g0"
libgomp has its own idea about cpu_relax:
static inline void
cpu_relax (void)
{
#if defined __arch64__ || defined __sparc_v9__
__asm volatile ("membar #LoadLoad" : : : "memory");
#else
__asm volatile ("" : : : "memory");
#endif
}
Maybe we can come up with a single implementation for libgomp and libitm?
And defined(__sparc_v9__) doesn't work on Solaris so we should drop the
condition altogether in libgomp.
--
Eric Botcazou
