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Re: [Qemu-devel] Math/FP problems in 0.5.0?

From: Fabrice Bellard
Subject: Re: [Qemu-devel] Math/FP problems in 0.5.0?
Date: Tue, 28 Oct 2003 22:37:41 +0100
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030624

Leigh Dyer wrote:

I've been playing with both CVS and the 0.5.0 release of qemu today,
using a debian system that I installed under bochs. The system boots and
seems to run quite well, but I noticed some numerical problems showing
up - e2fsck's percentage meter switched between 0.0% and nan%, and
running nbench produced similar results, with either 0 or nan for all
reported values in the output.

I thought that it might be a problem with my toolchain (gcc 3.3 in
Debian unstable messes things up, so I use unstable's gcc 3.2), so I
grabbed the qemu binary and linux test image from the website. Running
df seems to show the problem as well: the Capacity of the filesystem is
shown as 0%, and if you use df -h, Size, Used and Avail all show as 0G.

I am going to try to reproduce the problem. Maybe the memory macros for floating point access are incorrect.


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