<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class="">Action item:</div><div class=""><div class=""><blockquote type="cite" class=""><p class="MsoNormal"><span style="font-size: 10pt; font-family: Arial, sans-serif;" class="">Jim: Look at other uses of the phrase "sign bit" in the C standard.</span></p></blockquote></div></div><div class=""><br class=""></div><div class="">There are 10 occurrences of “sign bit” in N2596:</div><div class=""><br class=""></div><div class=""><div style="margin: 0px; font-stretch: normal; font-size: 13px; line-height: normal; font-family: "Helvetica Neue";" class="">6 in 6.2.6, about integers</div><div style="margin: 0px; font-stretch: normal; font-size: 13px; line-height: normal; font-family: "Helvetica Neue";" class="">1 in 6.7.2.1, pertaining to bit fields</div><div style="margin: 0px; font-stretch: normal; font-size: 13px; line-height: normal; font-family: "Helvetica Neue";" class="">1 in F.10.13.2, specifying setpayload</div><div style="margin: 0px; font-stretch: normal; font-size: 13px; line-height: normal; font-family: "Helvetica Neue";" class="">1 in F.10.13.3 specifying setpayloadsig</div><div style="margin: 0px; font-stretch: normal; font-size: 13px; line-height: normal; font-family: "Helvetica Neue";" class="">1 in the index</div></div><div style="margin: 0px; font-stretch: normal; font-size: 13px; line-height: normal; font-family: "Helvetica Neue";" class=""><br class=""></div><div style="margin: 0px; font-stretch: normal; font-size: 13px; line-height: normal; font-family: "Helvetica Neue";" class="">F.10.13.2 and F.10.13.3 specify a “zero sign bit” for a resulting NaN. I don’t see any such specification in IEEE 754. If it’s not there, we should consider removing it from C.</div><div style="margin: 0px; font-stretch: normal; font-size: 13px; line-height: normal; font-family: "Helvetica Neue";" class=""><br class=""></div><div style="margin: 0px; font-stretch: normal; font-size: 13px; line-height: normal; font-family: "Helvetica Neue";" class="">- Jim Thomas</div><div class=""><blockquote style="margin: 0px 0px 0px 40px; border: none; padding: 0px;" class=""><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><font face="Helvetica Neue" size="2" class=""><br class=""></font></div></blockquote><font face="Helvetica Neue" size="2" class=""></font></div></body></html>