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    CWG Issue 2724</TITLE>
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<P><EM>This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21
  Core Issues List revision 118b.
  See http://www.open-std.org/jtc1/sc22/wg21/ for the official
  list.</EM></P>
<P>2025-09-28</P>
<HR>
<A NAME="2724"></A><H4>2724.
  
Clarify rounding for arithmetic right shift
</H4>
<B>Section: </B>7.6.7&#160; [<A href="https://wg21.link/expr.shift">expr.shift</A>]
 &#160;&#160;&#160;

 <B>Status: </B>CD7
 &#160;&#160;&#160;

 <B>Submitter: </B>Jan Schultke
 &#160;&#160;&#160;

 <B>Date: </B>2023-04-07<BR>


<P>[Accepted as a DR at the June, 2023 meeting.]</P>

<P>(From
<A HREF="https://github.com/cplusplus/draft/pull/6225">editorial issue 6225</A>.)</P>

<P>Subclause 7.6.7 [<A href="https://wg21.link/expr.shift#3">expr.shift</A>] paragraph 3 specifies:</P>

<BLOCKQUOTE>

The value of E1 &gt;&gt; E2 is E1/2<sup>E2</sup>, rounded down.

</BLOCKQUOTE>

<P>It is unclear whether "rounded down" means "towards zero" or
"towards negative infinity".</P>

<P><B>Proposed resolution (approved by CWG 2023-05-12):</B></P>

<P>Change in 7.6.7 [<A href="https://wg21.link/expr.shift#3">expr.shift</A>] paragraph 3 as follows:</P>

<BLOCKQUOTE>

The value of E1 &gt;&gt; E2 is E1/2<sup>E2</sup>,
rounded <DEL>down</DEL> <INS>towards negative infinity</INS>.

</BLOCKQUOTE>

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