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doc/html/math_toolkit/next_float/ulp.html
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@@ -4,10 +4,11 @@
<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 4.1.0">
<link rel="home" href="../../index.html" title="Math Toolkit 4.1.1">
<link rel="up" href="../next_float.html" title="Floating-Point Representation Distance (ULP), and Finding Adjacent Floating-Point Values">
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@@ -109,11 +110,10 @@
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">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.
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.
</li>
</ul></div>
<p>
@@ -145,9 +145,7 @@
x<sub>c</sub>) / ulp(x<sub>t</sub>)</code>.
</p>
</div>
<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,
<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
@@ -155,8 +153,7 @@
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>
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</tr></table>
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