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<div class="moz-cite-prefix">Le 29/08/2016 09:46, Jan Åge Langeland
a écrit :<br>
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<blockquote
cite="mid:321bf67f-b693-cede-d03d-a99a8213eefb@online.no"
type="cite">
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<div class="moz-cite-prefix">On 29.08.2016 02:09, Tim Wescott
wrote:<br>
</div>
<blockquote cite="mid:1472429361.3023.62.camel@Servo" type="cite">
<pre wrap="">A kludge would be to make it into two integers.
</pre>
</blockquote>
<br>
Each case may not be so complex to work around, but in total it
seems like Scilab 6 is not yet well prepared for int64 and uint64.<br>
<br>
For instance %x and %o need to be handled too, functions like
dec2bin() and dec2hex() should work - etc.<br>
<br>
Generally a lot of caution is needed when using these 64 bit
integers. Example:<br>
<pre class="bz_comment_text" id="comment_text_5" style="font-size: small; font-family: monospace; white-space: pre-wrap; width: 1003px; color: rgb(0, 0, 0); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);">--> int64(2^62+256+1) //loss of prescision
ans =
4611686018427387904</pre>
</blockquote>
Yes, but this loss is expected, since 2^62+256+1 is performed with
decimal encoding.<br>
It is a case similar to the classical 1+ %eps/2<br>
It is not a bug.<br>
For dec2*(): int64 encoding is already supported, and a clear error
message is yielded for input integers > 2^52<br>
<br>
<tt>--> dec2bin(int64(2^52))</tt><tt><br>
</tt><tt> ans =</tt><tt><br>
</tt><tt> 10000000000000000000000000000000000000000000000000000</tt><tt><br>
</tt><tt><br>
</tt><tt>--> dec2bin(int64(2^53))</tt><tt><br>
</tt><tt>at line 12 of function dec2bin (
SCI\modules\elementary_functions\macros\dec2bin.sci line 43 )</tt><tt><br>
</tt><tt>dec2base: Wrong value for input argument #1: Must be
between 0 and 2^52.</tt><tt><br>
</tt><br>
So, there is still a limitation, but it is clearly stated. At least,
integers from 2^33 to 2^52 are newly supported :)<br>
<br>
Samuel<br>
<br>
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