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Re: [Qemu-devel] [Bug 645662] x87 fpu emulation not accurate enough

From: KONRAD Frederic
Subject: Re: [Qemu-devel] [Bug 645662] x87 fpu emulation not accurate enough
Date: Wed, 29 Nov 2017 10:39:18 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1


I have the same problem here with some of our math testsuites.
It's about some precision issue with trigonometric tests.

I didn't had time to figure out what happen neither what is
really going wrong. eg: trigonometric function or?

A quick workaround is to use KVM when possible.


On 11/29/2017 09:34 AM, william lin wrote:

I have been looking into this bug
<https://bugs.launchpad.net/qemu/+bug/645662> for a school project, and
after reproducing the bug and tracing through the code, I have run into a
wall trying to figure out the best way to approach this. If there is anyone
who is familiar with qemu's fpu and is willing, any tips or suggestions
will be fantastic.


Will & Wes

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