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Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions
From: |
Al Viro |
Subject: |
Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions |
Date: |
Tue, 8 Jul 2014 20:02:59 +0100 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Tue, Jul 08, 2014 at 11:12:20AM -0700, Richard Henderson wrote:
> On 07/08/2014 09:13 AM, Al Viro wrote:
> > Frankly, I suspect that it's better to have qemu-system-alpha behave like
> > the actual hardware does (including "FPCR.DNOD can't be set") and keep the
> > linux-user behaviour as is, for somebody brave and masochistic enough to
> > fight that one. And no, it's nowhere near "just let denorms ride through
> > the normal softfloat code and play a bit with the flags it might raise".
> > And then there's netbsd/alpha and openbsd/alpha, so in theory somebody might
> > want to play with their software completion semantics (not identical to
> > Linux
> > one) for the sake of yet-to-be-written bsd-user alpha support...
>
> You're probably right there.
>
> I've pushed a couple more patches to the branch, split out from your patch
> here. I believe I've got it all, and havn't mucked things up in the process.
> I'll run some tests later today when I've got time.
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.
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, (continued)
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Peter Maydell, 2014/07/08
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Richard Henderson, 2014/07/08
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Al Viro, 2014/07/08
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Peter Maydell, 2014/07/08
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Al Viro, 2014/07/08
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Peter Maydell, 2014/07/08
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Al Viro, 2014/07/10
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Alex Bennée, 2014/07/10
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Alex Bennée, 2014/07/09
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Richard Henderson, 2014/07/08
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions,
Al Viro <=
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Richard Henderson, 2014/07/08
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Al Viro, 2014/07/08
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Richard Henderson, 2014/07/09
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Al Viro, 2014/07/09
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Richard Henderson, 2014/07/10
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Al Viro, 2014/07/09