<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>At the Feb CFP meeting, Rajan noted that the proposed 6.2.5 [10a] in Part 3 needs work to clarify what is required and what is optional. The following rewrite is intended to do that. Please review.</div><div><br></div><div>-Jim</div><div><br></div><div>
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<!--StartFragment--><p class="stdtext"><span lang="EN-GB">[10a] IEC 60559 specifies interchange
formats, identified by their width, which can be used for the exchange of floating-point
data between implementations. Tables 1 and 2 give parameters for the IEC 60559
interchange formats.<o:p></o:p></span></p><p class="stdtext"><i><span lang="EN-GB">Table 1
goes here<o:p></o:p></span></i></p><p class="stdtext"><i><span lang="EN-GB">Table 2
goes here<o:p></o:p></span></i></p><p class="stdtext"><span lang="EN-GB">Types designated</span><o:p></o:p></p><p class="stdtext" style="margin-left:40.3pt">
<b><span style="font-family:
"Courier New";mso-ansi-language:EN-US">_Float</span></b><i>N</i>, where <i>N</i>
is 16, 32, 64, or ≥ 128 and a multiple of 32<o:p></o:p></p><p class="stdtext" style="margin-left:40.3pt"><b><span style="font-family:"Courier New";mso-ansi-language:EN-US">_Decimal</span></b><i>N</i>, where <i>N</i>
≥ 32 and a multiple of 32<o:p></o:p></p><p class="stdtext"><span lang="EN-GB">support the corresponding IEC 60559
interchange formats and are collectively called the <i>data-interchange types</i>. </span>Each
data-interchange type has the IEC 60559 interchange format corresponding to its
width and radix. Data-interchange types that are supported by all applicable
floating-point operations are collectively called the <i>interchange floating types</i>. An implementation that defines <b><span style="font-family:"Courier New";
mso-ansi-language:EN-US">__STDC_IEC_60559_BFP__</span></b> shall provide <b><span style="font-family:"Courier New";mso-ansi-language:EN-US">_Float32</span></b> and <b><span style="font-family:"Courier New";mso-ansi-language:EN-US">_Float64</span></b> as interchange floating types equivalent to <b><span style="font-family:"Courier New";
mso-ansi-language:EN-US">float</span></b>
and <b><span style="font-family:
"Courier New";mso-ansi-language:EN-US">double</span></b>, shall provide <b><span style="font-family:"Courier New";mso-ansi-language:EN-US">_Float16</span></b> as a data-interchange type, and may provide <b><span style="font-family:"Courier New";
mso-ansi-language:EN-US">_Float16</span></b> as an interchange floating type. If the implementation’s <b><span style="font-family:"Courier New";
mso-ansi-language:EN-US">long double</span></b> type has an IEC 60559 interchange format of width <i>N</i>, then the implementation shall provide the type <b><span style="font-family:"Courier New";
mso-ansi-language:EN-US">_Float</span></b><i>N</i> as an interchange floating type. An implementation may provide any of
the other data-interchange types and may provide any of them as interchange
floating types. <o:p></o:p></p>
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