boost/math
2
0
Fork 0
mirror of https://github.com/boostorg/math.git synced 2026-02-27 17:12:22 +00:00
Code Issues Projects Releases Wiki Activity

Revert "Update version history."

Browse Source 
This reverts commit 430f0dc6e2.
This commit is contained in:
Matt Borland
2023-11-18 08:23:17 +01:00
parent 430f0dc6e2
commit fd0a0bf207
493 changed files with 3132 additions and 2466 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
doc/html/math_toolkit/next_float/ulp.html
View File

@@ -4,11 +4,10 @@
<title>Obtaining the Size of a Unit In the Last Place - ULP</title>
<link rel="stylesheet" href="../../math.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
<link rel="home" href="../../index.html" title="Math Toolkit 4.1.1">
<link rel="home" href="../../index.html" title="Math Toolkit 4.1.0">
<link rel="up" href="../next_float.html" title="Floating-Point Representation Distance (ULP), and Finding Adjacent Floating-Point Values">
<link rel="prev" href="float_advance.html" title="Advancing a floating-point Value by a Specific Representation Distance (ULP) float_advance">
<link rel="next" href="../float_comparison.html" title="Floating-point Comparison">
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%"><tr>
@@ -110,10 +109,11 @@
When the argument becomes very small, it may be that there is no floating-point
value that represents one ULP. Whether this is the case or not depends
not only on whether the hardware may <span class="emphasis"><em>sometimes</em></span> support
denormals (as signalled by <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">math</span><span class="special">::</span><span class="identifier">detail</span><span class="special">::</span><span class="identifier">has_denorm_now</span><span class="special">&lt;</span><span class="identifier">FPT</span><span class="special">&gt;()</span></code>), but also whether these are currently
enabled at runtime (for example on SSE hardware, the DAZ or FTZ flags
will disable denormal support). In this situation, the <code class="computeroutput"><span class="identifier">ulp</span></code> function may return a value that
is many orders of magnitude too large.
denormals (as signalled by <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">numeric_limits</span><span class="special">&lt;</span><span class="identifier">FPT</span><span class="special">&gt;::</span><span class="identifier">has_denorm</span></code>),
but also whether these are currently enabled at runtime (for example
on SSE hardware, the DAZ or FTZ flags will disable denormal support).
In this situation, the <code class="computeroutput"><span class="identifier">ulp</span></code>
function may return a value that is many orders of magnitude too large.
</li>
</ul></div>
<p>
@@ -145,7 +145,9 @@
x<sub>c</sub>) / ulp(x<sub>t</sub>)</code>.
</p>
</div>
<div class="copyright-footer">Copyright © 2006-2021 Nikhar Agrawal, Anton Bikineev, Matthew Borland,
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2006-2021 Nikhar Agrawal, Anton Bikineev, Matthew Borland,
Paul A. Bristow, Marco Guazzone, Christopher Kormanyos, Hubert Holin, Bruno
Lalande, John Maddock, Evan Miller, Jeremy Murphy, Matthew Pulver, Johan Råde,
Gautam Sewani, Benjamin Sobotta, Nicholas Thompson, Thijs van den Berg, Daryle
@@ -153,7 +155,8 @@
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p>
</div>
</div></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="float_advance.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../next_float.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../float_comparison.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>