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<p>The problem is that Free Pascal automatically scales up inputs to
the word size, usually 32-bits. If you do a node dump of a
division node, you'll see that the input will often have a
typecast node cast upon it. It is possible to remove it, but it
would have to be done at a different compiler stage. I might see
if it's possible to implement this at a later stage, since I've
done just that for my latest merge request for "(x mod n) = 0".</p>
<p>Gareth aka. Kit<br>
</p>
<div class="moz-cite-prefix">On 15/09/2021 18:36, Marģers . via
fpc-devel wrote:<br>
</div>
<blockquote type="cite"
cite="mid:1631727410.61422f32eda23@mail.inbox.lv">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
Hi,<br>
Thank you for implementation.<br>
<br>
Is that true, that you can not detect word and byte size on
division by constant? Squeezing in 32 bit register it would make
byte-code shorter, not necessarily faster.<br>
<div class="noTransl">----- Reply to message -----<br>
<b>Subject: </b>Re: [fpc-devel] The "magic div" algorithm<br>
<b>From: </b> J. Gareth Moreton via fpc-devel <a
href="mailto:fpc-devel@lists.freepascal.org"
moz-do-not-send="true"><fpc-devel@lists.freepascal.org></a><br>
<b>To: </b> <a href="mailto:fpc-devel@lists.freepascal.org"
moz-do-not-send="true"><fpc-devel@lists.freepascal.org></a></div>
<blockquote>This one is for Marģers especially:<br>
<br>
<a
href="https://gitlab.com/freepascal.org/fpc/source/-/issues/39355"
target="_blank" moz-do-not-send="true">https://gitlab.com/freepascal.org/fpc/source/-/issues/39355</a><br>
<br>
Gareth aka. Kit<br>
<br>
<br>
</blockquote>
<br>
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