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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: |
Wed, 2 Jul 2014 16:20:27 +0100 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
> I'm interested in the results of the following test.
DS10:
/su : 1/3 -i---
/sui : 1/3 -i---
/su : min*min -i--u
/sui : min*min -i--u
/ : (long)4.5 -i---
/sv : (long)4.5 -i---
/svi : (long)4.5 -i---
/ : (long)max -i---
/sv : (long)max -iI--
/svi : (long)max -iI--
AS200:
/su : 1/3 -----
/sui : 1/3 -----
/su : min*min -i--u
/sui : min*min -i--u
/ : (long)4.5 -----
/sv : (long)4.5 -----
/svi : (long)4.5 -----
/ : (long)max -----
/sv : (long)max --I--
/svi : (long)max --I--
qemu:
/su : 1/3 -i---
/sui : 1/3 -i---
/su : min*min -i--u
/sui : min*min -i--u
/ : (long)4.5 -i---
/sv : (long)4.5 -i---
/svi : (long)4.5 -i---
/ : (long)max -i---
/sv : (long)max -iI--
/svi : (long)max -iI--
IOW, same as EV6. The difference is due to the kernel trusting FPCR.INE
as source for FE_INEXACT when it sees implver() returning 2. See a bit
upthread for analysis...
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, (continued)
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Al Viro, 2014/07/01
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Peter Maydell, 2014/07/01
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Richard Henderson, 2014/07/01
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Peter Maydell, 2014/07/01
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Al Viro, 2014/07/02
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Al Viro, 2014/07/02
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Al Viro, 2014/07/02
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Richard Henderson, 2014/07/02
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Al Viro, 2014/07/02
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Richard Henderson, 2014/07/02
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions,
Al Viro <=
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Al Viro, 2014/07/03
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Al Viro, 2014/07/03
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Richard Henderson, 2014/07/03
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Al Viro, 2014/07/03
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Peter Maydell, 2014/07/03
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Al Viro, 2014/07/03
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Al Viro, 2014/07/03
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Richard Henderson, 2014/07/04
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Al Viro, 2014/07/04
- Re: [Qemu-devel] [RFC] alpha qemu arithmetic exceptions, Al Viro, 2014/07/04