http://millcomputing.com/w/index.php?title=Overflow&feed=atom&action=historyOverflow - Revision history2024-03-29T00:03:34ZRevision history for this page on the wikiMediaWiki 1.23.1http://millcomputing.com/w/index.php?title=Overflow&diff=2552&oldid=prevJan at 23:50, 29 December 20142014-12-29T23:50:43Z<p></p>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 23:50, 29 December 2014</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div># saturating - the highest of lowest representable value in the given with is the returned result</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div># saturating - the highest of lowest representable value in the given with is the returned result</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div># excepting - the appropriate [[NaR]] is created as the result</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div># excepting - the appropriate [[NaR]] is created as the result</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div># widening - here the scalar byte width is doubled and the full and exact result is the return value</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div># widening - here the scalar byte width is doubled<ins class="diffchange diffchange-inline">, whether it is needed or not, </ins>and the full and exact result is the return value</div></td></tr>
</table>Janhttp://millcomputing.com/w/index.php?title=Overflow&diff=1402&oldid=prevJan at 10:00, 11 December 20142014-12-11T10:00:41Z<p></p>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 10:00, 11 December 2014</td>
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<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>When integer operations produce values that can't be contained within the bit width of the result, there are different strategies of how to deal with it.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>When integer operations produce values that can't be contained within the bit width of the result, there are different strategies of how to deal with it<ins class="diffchange diffchange-inline">. Which one is used depends on the chosen operation</ins>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>In all cases the [[Condition_Code|condition codes]] are generated and can be queried with the dedicated ganged operations. What the overflow behavior does determine is the primary result that is produced.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>In all cases the [[Condition_Code|condition codes]] are generated and can be queried with the dedicated ganged operations. What the overflow behavior does determine is the primary result that is produced.</div></td></tr>
</table>Janhttp://millcomputing.com/w/index.php?title=Overflow&diff=1401&oldid=prevJan at 09:59, 11 December 20142014-12-11T09:59:40Z<p></p>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 09:59, 11 December 2014</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>In all cases the [[Condition_Code|condition codes]] are generated and can be queried with the dedicated ganged operations. What the overflow behavior does determine is the primary result that is produced.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>In all cases the [[Condition_Code|condition codes]] are generated and can be queried with the dedicated ganged operations. What the overflow behavior does determine is the primary result that is produced.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del class="diffchange diffchange-inline">1. </del>modulo - normal silent overflow or underflow, also called wraparound</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"># </ins>modulo - normal silent overflow or underflow, also called wraparound</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del class="diffchange diffchange-inline">2. </del>saturating - the highest of lowest representable value in the given with is the returned result</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"># </ins>saturating - the highest of lowest representable value in the given with is the returned result</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del class="diffchange diffchange-inline">3. </del>excepting - the appropriate [[NaR]] is created as the result</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"># </ins>excepting - the appropriate [[NaR]] is created as the result</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del class="diffchange diffchange-inline">4. </del>widening - here the scalar byte width is doubled and the full and exact result is the return value</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"># </ins>widening - here the scalar byte width is doubled and the full and exact result is the return value</div></td></tr>
</table>Janhttp://millcomputing.com/w/index.php?title=Overflow&diff=1400&oldid=prevJan: Created page with "When integer operations produce values that can't be contained within the bit width of the result, there are different strategies of how to deal with it. In all cases the C..."2014-12-11T09:59:17Z<p>Created page with "When integer operations produce values that can't be contained within the bit width of the result, there are different strategies of how to deal with it. In all cases the C..."</p>
<p><b>New page</b></p><div>When integer operations produce values that can't be contained within the bit width of the result, there are different strategies of how to deal with it.<br />
<br />
In all cases the [[Condition_Code|condition codes]] are generated and can be queried with the dedicated ganged operations. What the overflow behavior does determine is the primary result that is produced.<br />
<br />
1. modulo - normal silent overflow or underflow, also called wraparound<br />
2. saturating - the highest of lowest representable value in the given with is the returned result<br />
3. excepting - the appropriate [[NaR]] is created as the result<br />
4. widening - here the scalar byte width is doubled and the full and exact result is the return value</div>Jan