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<title>Issue 599: [dec.tr] Say "octets" instead of "bytes."</title>
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<p><em>This page is a snapshot from the LWG issues list, see the <a href="lwg-active.html">Library Active Issues List</a> for more information and the meaning of <a href="lwg-active.html#TRDec">TRDec</a> status.</em></p>
<h3 id="599"><a href="lwg-defects.html#599">599</a>. [dec.tr] Say "octets" instead of "bytes."</h3>
<p><b>Section:</b> 3.1 [dec.tr::trdec.types.encodings] <b>Status:</b> <a href="lwg-active.html#TRDec">TRDec</a>
 <b>Submitter:</b> Daniel Krugler <b>Opened:</b> 2006-05-28 <b>Last modified:</b> 2016-01-31</p>
<p><b>Priority: </b>Not Prioritized
</p>
<p><b>View all issues with</b> <a href="lwg-status.html#TRDec">TRDec</a> status.</p>
<p><b>Discussion:</b></p>
<p>
Daniel writes in a private email:
</p>

<blockquote>
<p>
- 3.1 'Decimal type encodings' says in its note:
</p>
<pre>
"this implies that 
sizeof(std::decimal::decimal32) == 4, 
sizeof(std::decimal::decimal64) == 8, and 
sizeof(std::decimal::decimal128) == 16."
</pre>
<p>
This is a wrong assertion, because the definition 
of 'byte' in 1.7 'The C+ + memory model' of ISO 
14882 (2nd edition) does not specify that a byte 
must be necessarily 8 bits large, which would be 
necessary to compare with the specified bit sizes 
of the types decimal32, decimal64, and decimal128.
</p>
</blockquote>


<p id="res-599"><b>Proposed resolution:</b></p>
<p>
Change 3.1 as follows:
</p>
<blockquote>
<p>
The three decimal encoding formats defined in IEEE-754R correspond to the three decimal floating types as follows:
</p>
<ul>
<li>
decimal32 is a <em>decimal32</em> number, which is encoded in four consecutive <del>bytes</del> <ins>octets</ins> (32 bits)
</li>
<li>
decimal64 is a <em>decimal64</em> number, which is encoded in eight consecutive <del>bytes</del> <ins>octets</ins> (64 bits)

</li>
<li>
decimal128 is a <em>decimal128</em> number, which is encoded in 16 consecutive <del>bytes</del> <ins>octets</ins> (128 bits)
</li>
</ul>
<p>
<del>[<i>Note:</i> this implies that <code>sizeof(std::decimal::decimal32) == 4</code>, <code>sizeof(std::decimal::decimal64) == 8</code>, and <code>sizeof(std::decimal::decimal128) == 16</code>.  <i>--end note</i>]</del>
</p>
</blockquote>




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