Boost-Commit mailing page: [Boost-commit] svn:boost r83963 - in sandbox/precision/libs/precision/doc: . html html/precision

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Subject: [Boost-commit] svn:boost r83963 - in sandbox/precision/libs/precision/doc: . html html/precision
From: pbristow_at_[hidden]
Date: 2013-04-19 07:53:18

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Author: pbristow
Date: 2013-04-19 07:53:17 EDT (Fri, 19 Apr 2013)
New Revision: 83963
URL: http://svn.boost.org/trac/boost/changeset/83963

Log:
Added new file for just plain html version of standard section.
Added:
   sandbox/precision/libs/precision/doc/n3626 standard.html (contents, props changed)
Text files modified:
   sandbox/precision/libs/precision/doc/html/index.html | 2 +-
   sandbox/precision/libs/precision/doc/html/precision/thestandard.html | 4 ++--
   sandbox/precision/libs/precision/doc/html/precision/version_id.html | 2 +-
   sandbox/precision/libs/precision/doc/precision.qbk | 2 +-
   4 files changed, 5 insertions(+), 5 deletions(-)

Modified: sandbox/precision/libs/precision/doc/html/index.html
==============================================================================
--- sandbox/precision/libs/precision/doc/html/index.html (original)
+++ sandbox/precision/libs/precision/doc/html/index.html 2013-04-19 07:53:17 EDT (Fri, 19 Apr 2013)
@@ -78,7 +78,7 @@

</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
-<td align="left">Last revised: April 18, 2013 at 13:32:31 GMT</td>
+<td align="left">Last revised: April 19, 2013 at 11:52:23 GMT</td>
<td align="right"><div class="copyright-footer"></div></td>
</tr></table>
<hr>

Modified: sandbox/precision/libs/precision/doc/html/precision/thestandard.html
==============================================================================
--- sandbox/precision/libs/precision/doc/html/precision/thestandard.html (original)
+++ sandbox/precision/libs/precision/doc/html/precision/thestandard.html 2013-04-19 07:53:17 EDT (Fri, 19 Apr 2013)
@@ -178,8 +178,8 @@
 that they all use the same endianness and the same use of denormals.
 

- The header <code class="computeroutput">stdfloat.h</code> should also contain all necessary C function
- macros in the form shown below.
+ The header <code class="computeroutput">stdfloat.h</code> (called by <code class="computeroutput"><cstdfloat></code>
+ should also contain all necessary C function macros in the form shown below.
 
<pre class="programlisting">FLOAT{16 32 64 80 128 MAX}_C
</pre>

Modified: sandbox/precision/libs/precision/doc/html/precision/version_id.html
==============================================================================
--- sandbox/precision/libs/precision/doc/html/precision/version_id.html (original)
+++ sandbox/precision/libs/precision/doc/html/precision/version_id.html 2013-04-19 07:53:17 EDT (Fri, 19 Apr 2013)
@@ -26,7 +26,7 @@
<a name="precision.version_id"></a><a class="link" href="version_id.html" title="Version Info">Version Info</a>
</h2></div></div></div>

- Last edit to Quickbook file precision.qbk was at 02:32:31 PM on 2013-Apr-18.
+ Last edit to Quickbook file precision.qbk was at 12:52:23 PM on 2013-Apr-19.

<div class="tip"><table border="0" summary="Tip">
<tr>

Added: sandbox/precision/libs/precision/doc/n3626 standard.html
==============================================================================
--- (empty file)
+++ sandbox/precision/libs/precision/doc/n3626 standard.html 2013-04-19 07:53:17 EDT (Fri, 19 Apr 2013)
@@ -0,0 +1,135 @@
+<HTML><HEAD><TITLE>N3626, Proposal for Unbounded-Precision Integer Types</TITLE></HEAD><BODY>
+
+<CENTER>
+<H1><A NAME="N3626, Proposal for floating-point-typedefs Having Specified Widths">Proposal for floating-point-typedefs Having Specified Widths</A></H1>
+</CENTER>
+
+<TABLE ALIGN="RIGHT" CELLSPACING="0" CELLPADDING="0">
+<TR>
+<TD ALIGN="RIGHT">Document number:</TD>
+<TD>  N3626</TD>
+</TR>
+<TR>
+<TD ALIGN="RIGHT">Date:</TD>
+<TD>  2013-04-18</TD>
+</TR>
+<TR>
+<TD ALIGN="RIGHT">Revises part of:</TD>
+<TD>  N3636</TD>
+</TR>
+<TD ALIGN="RIGHT">Also part of:</TD>
+<TD>  N1703</TD>
+</TR>
+
+<TR>
+<TD ALIGN="RIGHT">Project:</TD>
+<TD>  Programming Language C++</TD>
+</TR>
+<TR>
+<TD ALIGN="RIGHT">Reference:</TD>
+<TD>  ISO/IEC IS 14882:2011(E)</TD>
+</TR>
+<TR>
+<TD ALIGN="RIGHT">Reply to:</TD>
+<TD>  Paul A. Bristow</TD>
+</TR>
+<TR>
+<TD></TD>
+<TD>  Boost.org.</TD>
+</TR>
+<TR>
+<TD></TD>
+<TD>  pbristow_at_[hidden]</TD>
+</TR>
+</TABLE>
+ 
+
+<HR>
+
+<H2><A NAME="header_stdfloat">Header <code><stdfloat></code>
+synopsis</A></H2>
+
+<pre><code>namespace std
+{
+
+ typedef floating-point-type float8_t; // optional (See note 1).
+ typedef floating-point-type float16_t; // optional (See note 2).
+ typedef floating-point-type float24_t; // optional (See note 3.
+ typedef floating-point-type float32_t; // optional (See note 4).
+ typedef floating-point-type float64_t; // optional (See note 5).
+ typedef floating-point-type float80_t; // optional (See note 6).
+ typedef floating-point-type float128_t; // optional (See note 7).
+ typedef floating-point-type floatmax_t; // optional (largest floating-point-type available).
+
+ typedef floating-point-type float_least16_t; // optional.
+ typedef floating-point-type float_least32_t; // optional.
+ typedef floating-point-type float_least64_t; // optional.
+ typedef floating-point-type float_least128_t; // optional.
+
+ typedef floating-point-type float_fast16_t; // optional.
+ typedef floating-point-type float_fast32_t; // optional.
+ typedef floating-point-type float_fast64_t; // optional.
+ typedef floating-point-type float_fast80_t; // optional.
+ typedef floating-point-type float_fast128_t; // optional.
+
+} /* namespace std */
+
+</code></pre>
+
+Notes
+
+
+
+<ol>
+<li>There is no IEEE754/IEC559 specification for a 8-bit floating-point type, so the layout is implementation dependent.
+The type should occupy exactly 8 bits to allow optimisation.</li>
+<li>There is no IEEE754/IEC559 specification for a 24-bit floating-point type, so the layout is implementation dependent.</li>
+<li>IEEE754 Half precision.</li>
+<li>IEEE754 Single precision.</li>
+<li>IEEE754 Double precision.</li>
+<li>IEEE754 Extended precision. This type may be implemented using 128 bits, with padding.
+The size and location of any padding is implementation dependent, so this type is unlikely to be suitable for binary interchange.</li>
+<li>IEEE754 Quadruple precision.</li>
+<li>The use of denormals is implementation dependent, but can be determined for any type T from
+<code>std::numeric_limits<T>::has_denorm, denorm_min</code> and <code>float_denorm_style.</code></li>
+<li>If cooperating programs wish to try to use binary interchange for IEEE754/IEC559 types of <code>float_N_t</code>,
+for example for serialization,
+because the endianness of the layout of the floating-point types is not specified (but may be determined)
+therefore programs must ensure that they all use the same endianness and the same use of denormals.</li>
+</ol>
+
+The header <code>stdfloat.h</code> should also contain all necessary C function macros in the form shown below.
+
+<code><pre>
+ FLOAT{16 32 64 80 128 MAX}_C
+</code></pre>
+
+The code below, for example, initializes a constant <code>float128_t</code> value using one of these macros.
+<code><pre>
+ #include stdfloat.h
+
+ constexpr std::float128_t euler = FLOAT128_C(0.57721566490153286060651209008240243104216);
+</code></pre>
+
+The following code initializes a constant <code>float16_t </code> value using another one of these macros.
+<code><pre>
+ const std::float16_t euler = FLOAT16_C(0.577216);
+</code></pre>
+
+In addition, the header <code>stdfloat.h</code> and <code><cstdfloat> </code>should contain all necessary macros of the form:
+<code><pre>
+ FLOAT_[FAST LEAST]{16 32 64 80 128}_MIN
+ FLOAT_[FAST LEAST]{16 32 64 80 128}_MAX
+ FLOATMAX_MIN
+ FLOATMAX_MAX
+</code></pre>
+
+These macros can be used to query the ranges of the optional floating-point typedefs having specified widths at compile-time. For example, 
+<code><pre>
+ #include <limits>
+ #include <cstdfloat> // or #include stdfloat.h
+
+ static_assert(FLOATMAX_MAX > (std::numeric_limits<float>::max)(),
+ "The iec559 floating-point range is too small.");
+</code></pre>
+</BODY></HTML>

Modified: sandbox/precision/libs/precision/doc/precision.qbk
==============================================================================
--- sandbox/precision/libs/precision/doc/precision.qbk (original)
+++ sandbox/precision/libs/precision/doc/precision.qbk 2013-04-19 07:53:17 EDT (Fri, 19 Apr 2013)
@@ -463,7 +463,7 @@
because the endianness of the layout of the floating-point types is not specified (but may be determined)
therefore programs must ensure that they all use the same endianness and the same use of denormals.

-The header `stdfloat.h` should also contain all necessary C function macros in the form shown below.
+The header `stdfloat.h` (called by `<cstdfloat>` should also contain all necessary C function macros in the form shown below.

FLOAT{16 32 64 80 128 MAX}_C

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