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<p>Thanks Ondrej.</p>
<p>In the meantime, I've found the problem and am testing a fix.
Basically the function that computes the magic number for a given
bit size doesn't sign-extend it to the full size. In the given
example, the signed divisior +60 for 32-bit produces the
multiplicand $88888889. However, under x86_64, it is not
sign-extended to the full 64-bit internal type... that is, the
variable holds $00000000 88888889 instead of $FFFFFFFF 88888889.
This causes a later condition that checks if the value is less
than 0 to malfunction.</p>
<p>Gareth aka. Kit<br>
</p>
<div class="moz-cite-prefix">On 18/08/2022 07:06, Ondrej Pokorny via
fpc-devel wrote:<br>
</div>
<blockquote type="cite"
cite="mid:8f11ddb8-ea86-01e1-842e-122acd56e48a@kluug.net">
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<p>Hello it looks like only people with FPC developer status can
move issues to the FPC project. Therefore I forward the request
to fpc-devel.</p>
<p>Ondrej<br>
</p>
<div class="moz-forward-container"><br>
-------- Weitergeleitete Nachricht --------
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cellpadding="0" border="0">
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Betreff:
</th>
<td>[Lazarusdev] Moving issue 39853 to FPC project</td>
</tr>
<tr>
<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Datum:
</th>
<td>Thu, 18 Aug 2022 03:51:33 +0300</td>
</tr>
<tr>
<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Kopie
(CC): </th>
<td>Maxim Ganetsky <a class="moz-txt-link-rfc2396E"
href="mailto:ganmax@narod.ru" moz-do-not-send="true"><ganmax@narod.ru></a></td>
</tr>
</tbody>
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<br>
<br>
Hello.<br>
<br>
Could someone move this issue to FPC project please:<br>
<a class="moz-txt-link-freetext"
href="https://gitlab.com/freepascal.org/lazarus/lazarus/-/issues/39853"
moz-do-not-send="true">https://gitlab.com/freepascal.org/lazarus/lazarus/-/issues/39853</a><br>
<br>
<pre class="moz-signature">--
Best regards,
Maxim Ganetsky <a class="moz-txt-link-freetext" href="mailto:ganmax@narod.ru" moz-do-not-send="true">mailto:ganmax@narod.ru</a>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
fpc-devel maillist - <a class="moz-txt-link-abbreviated" href="mailto:fpc-devel@lists.freepascal.org">fpc-devel@lists.freepascal.org</a>
<a class="moz-txt-link-freetext" href="https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-devel">https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-devel</a>
</pre>
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