Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions

[Al Viro]

On Tue, Jul 08, 2014 at 12:04:10PM -0700, Richard Henderson wrote:

> > Just one thing - 0x1fffffffffffff will make 32bit hosts whine about integer
> > constant being too large.  So will 0x1ffffffffffffful, unfortunately - it
> > really ought to be ull.
> > 
> 
> I did use ull on the branch.

Aha...  So you've caught that one already...  I've looked at your branch;
AFAICS, the only thing missing there is treating stores to FPCR.DNOD in
system mode as "not implemented" (which it is in the code as well as in
21[0-3]64 hardware).  Other than that everything seems to be fine; you are
right about cvtql treatment - since that sucker doesn't have /i in any
allowed trap suffices, we might as well just raise Inexact and let it be
masked out - float_flag_inexact will be present in 'ignore'.  And yes,
folding the calculation itself in there obviously makes sense.