upstream-man-pages/manglsl/xhtml/ldexp.xml

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   4 <?xml-stylesheet type="text/xsl" href="mathml.xsl"?><html xmlns="http://www.w3.org/1999/xhtml" xmlns:pref="http://www.w3.org/2002/Math/preference" pref:renderer="mathplayer-dl"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><link rel="stylesheet" type="text/css" href="opengl-man.css" /><title>ldexp - OpenGL Shading Language (GLSL)</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1" /></head><body><div class="refentry" lang="en" xml:lang="en"><a id="ldexp"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>ldexp — assemble a floating point number from a value and exponent</p></div><div class="refsynopsisdiv"><h2>Declaration</h2><div class="funcsynopsis"><p><code class="funcdef">genType <b class="fsfunc">ldexp</b>(</code>genType <var class="pdparam">x</var>, genIType <var class="pdparam">exp</var><code>)</code>;</p><p><code class="funcdef">genDType <b class="fsfunc">ldexp</b>(</code>genDType <var class="pdparam">x</var>, genIType <var class="pdparam">exp</var><code>)</code>;</p></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>x</code></em></span></dt><dd><p>
   5                     Specifies the value to be used as a source of significand.
   6                 </p></dd><dt><span class="term"><em class="parameter"><code>out exp</code></em></span></dt><dd><p>
   7                     Specifies the value to be used as a source of exponent.
   8                 </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p>
   9             <code class="function">ldexp</code> builds a floating point number from <em class="parameter"><code>x</code></em> and
  10             the corresponding integral exponent of two in <em class="parameter"><code>exp</code></em>, returning:
  11         </p><p>
  12             <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
  13                 <mml:mi>significand</mml:mi>
  14                 <mml:mo lspace="2px" rspace="2px">⋅</mml:mo>
  15                 <mml:msup>
  16                     <mml:mn>2</mml:mn>
  17                     <mml:mi>exponent</mml:mi>
  18                 </mml:msup>
  19             </mml:math>
  20         </p><p>
  21             If this product is too large to be represented in the floating point type, the result
  22             is undefined.
  23         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="versions"></a><h2>Version Support</h2><div class="informaltable"><table border="1"><colgroup><col align="left" /><col align="center" /><col align="center" /><col align="center" /><col align="center" /><col align="center" /><col align="center" /><col align="center" /><col align="center" /><col align="center" /><col align="center" /></colgroup><thead><tr><th align="left"><span class="bold"><strong>Function</strong></span></th><th align="left"><span class="bold"><strong>Version 1.10</strong></span></th><th align="left"><span class="bold"><strong>Version 1.20</strong></span></th><th align="left"><span class="bold"><strong>Version 1.30</strong></span></th><th align="left"><span class="bold"><strong>Version 1.40</strong></span></th><th align="left"><span class="bold"><strong>Version 1.50</strong></span></th><th align="left"><span class="bold"><strong>Version 3.30</strong></span></th><th align="left"><span class="bold"><strong>Version 4.00</strong></span></th><th align="left"><span class="bold"><strong>Version 4.10</strong></span></th><th align="left"><span class="bold"><strong>Version 4.20</strong></span></th><th align="center"><span class="bold"><strong>Version 4.30</strong></span></th></tr><tr><th align="left">ldexp (genType)</th><th align="center"><span class="emphasis"><em>-</em></span></th><th align="center"><span class="emphasis"><em>-</em></span></th><th align="center"><span class="emphasis"><em>-</em></span></th><th align="center"><span class="emphasis"><em>-</em></span></th><th align="center"><span class="emphasis"><em>-</em></span></th><th align="center"><span class="emphasis"><em>-</em></span></th><th align="center"><span class="emphasis"><em>Y</em></span></th><th align="center"><span class="emphasis"><em>Y</em></span></th><th align="center"><span class="emphasis"><em>Y</em></span></th><th align="center"><span class="emphasis"><em>Y</em></span></th></tr><tr><th align="left">ldexp (genDType)</th><th align="center"><span class="emphasis"><em>-</em></span></th><th align="center"><span class="emphasis"><em>-</em></span></th><th align="center"><span class="emphasis"><em>-</em></span></th><th align="center"><span class="emphasis"><em>-</em></span></th><th align="center"><span class="emphasis"><em>-</em></span></th><th align="center"><span class="emphasis"><em>-</em></span></th><th align="center"><span class="emphasis"><em>Y</em></span></th><th align="center"><span class="emphasis"><em>Y</em></span></th><th align="center"><span class="emphasis"><em>Y</em></span></th><th align="center"><span class="emphasis"><em>Y</em></span></th></tr></thead></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>
  24             <a href="frexp.xml"><span class="citerefentry"><span class="refentrytitle">frexp</span></span></a>
  25         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p>
  26             Copyright <span class="trademark"></span>© 2011 Khronos Group.
  27             This material may be distributed subject to the terms and conditions set forth in
  28             the Open Publication License, v 1.0, 8 June 1999.
  29             <a href="http://opencontent.org/openpub/" target="_top">http://opencontent.org/openpub/</a>.
  30         </p></div></div></body></html>