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    <title>MongoDB Jira</title>
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    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-2940] Double precision errors on linux 32 bit builds</title>
                <link>https://jira.mongodb.org/browse/SERVER-2940</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The optimizations applied to point-comparison math for 2d queries in core.h result in incorrect results.  Basically:&lt;/p&gt;

&lt;p&gt;return _y &amp;gt; p._y ? p._y + radius &amp;gt;= _y : _y + radius &amp;gt;= p._y;&lt;/p&gt;

&lt;p&gt;... returns incorrect results on linux32, but the equivalent :&lt;/p&gt;

&lt;p&gt;volatile double sum = _y &amp;gt; p._y ? p._y + radius : _y + radius;&lt;br/&gt;
return _y &amp;gt; p._y ? sum &amp;gt;= _y : sum &amp;gt;= p._y;&lt;/p&gt;

&lt;p&gt;... returns the correct results.  Volatile is required.&lt;/p&gt;

&lt;p&gt;From mathias, adding compiler flags:&lt;/p&gt;

&lt;p&gt; -mfpmath=sse and either -msse2 or -march=pentium4&lt;/p&gt;

&lt;p&gt;... solves the problem, but limits our target architectures.&lt;/p&gt;</description>
                <environment>(Ubuntu?) linux g++ (Ubuntu/Linaro 4.4.4-14ubuntu5) 4.4.5 &lt;br/&gt;
</environment>
        <key id="16094">SERVER-2940</key>
            <summary>Double precision errors on linux 32 bit builds</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="greg_10gen">Greg Studer</assignee>
                                    <reporter username="greg_10gen">Greg Studer</reporter>
                        <labels>
                    </labels>
                <created>Tue, 12 Apr 2011 22:18:18 +0000</created>
                <updated>Tue, 12 Jul 2016 00:19:15 +0000</updated>
                            <resolved>Fri, 6 May 2011 21:59:03 +0000</resolved>
                                                    <fixVersion>1.9.1</fixVersion>
                                    <component>Geo</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="31410" author="auto" created="Fri, 6 May 2011 21:49:44 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;gregstuder&apos;, u&apos;name&apos;: u&apos;gregs&apos;, u&apos;email&apos;: u&apos;greg@10gen.com&apos;}
&lt;p&gt;Message: no volatile reqd for 64-bit systems &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-2940&quot; title=&quot;Double precision errors on linux 32 bit builds&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-2940&quot;&gt;&lt;del&gt;SERVER-2940&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/9c79d5735da100a25aed37c3a1339b69e8883c07&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9c79d5735da100a25aed37c3a1339b69e8883c07&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="28867" author="auto" created="Tue, 12 Apr 2011 22:38:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;gregstuder&apos;, u&apos;name&apos;: u&apos;gregs&apos;, u&apos;email&apos;: u&apos;greg@10gen.com&apos;}
&lt;p&gt;Message: fix for bad optimization on linux32 &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-2940&quot; title=&quot;Double precision errors on linux 32 bit builds&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-2940&quot;&gt;&lt;del&gt;SERVER-2940&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/bba87960d05de77e29e002048fe28131bc703365&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/bba87960d05de77e29e002048fe28131bc703365&lt;/a&gt;&lt;/p&gt;</comment>
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