<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><meta http-equiv="content-type" content="text/html; charset=utf-8"><div style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div>Regarding action item</div><div><br></div><div><blockquote type="cite"><div style="margin: 0in; font-family: "Times New Roman", serif;"><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> Jim/David: Check IEEE-754 if there is a similar issue to CFP2899.<o:p></o:p></span></div></blockquote></div><div><br></div><div><br></div><div>754-2019 5.12.2 NOTE 1 includes</div><div><br></div><blockquote style="margin: 0 0 0 40px; border: none; padding: 0px;"><div><div>— Conversions from a supported binary format <i>bf</i> to an external character sequence and back again</div></div><div><div>results in a copy of the original number so long as there are at least <i>Pmin</i>(<i>bf </i>) significant digits</div></div><div><div>specified and the rounding-direction attributes in effect during the two conversions are round to</div></div><div><div>nearest rounding-direction attributes.</div></div></blockquote><div><br></div><div>So 754 does not have the problem mentioned in Cfp-interest 2899.</div><div><br></div><div>Not mentioned in Cfp-interest 2899, 5.2.4.2.2 also has <i>type</i><b>_DIG</b> macros which are the</div><div><br></div><blockquote style="margin: 0 0 0 40px; border: none; padding: 0px;"><div><div>— number of decimal digits, <i>q</i>, such that any floating-point number with <i>q</i> decimal digits can be rounded into a floating-point number with <i>p</i> radix <i>b</i> digits and back again without change to the <i>q</i> decimal digits</div></div></blockquote><div><br></div><div>This property too requires to-nearest rounding. The requirement needs to be added to the <i>type</i><b>_DIG</b> specification C 5.2.4.2.2. (I didn’t see a statement of this round-trip property in 754-2019.)</div><div><br></div><div>- Jim Thomas</div><div><br></div></div></body></html>