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  <div class="section" id="c-language-half-float-conversion">
<h1>C-language half-float Conversion<a class="headerlink" href="#c-language-half-float-conversion" title="Permalink to this headline">¶</a></h1>
<p>The <code class="docutils literal notranslate"><span class="pre">half.h</span></code> header can be included in pure C code:</p>
<div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="cp">#include</span> <span class="cpf">&lt;Imath/half.h&gt;</span><span class="cp"></span>

<span class="kt">void</span>
<span class="nf">half_example</span><span class="p">()</span>
<span class="p">{</span>
    <span class="kt">float</span> <span class="n">f</span> <span class="o">=</span> <span class="mf">3.5f</span><span class="p">;</span>
  
    <span class="n">half</span> <span class="n">h</span> <span class="o">=</span> <span class="n">imath_float_to_half</span> <span class="p">(</span><span class="n">f</span><span class="p">)</span>

    <span class="kt">float</span> <span class="n">hh</span> <span class="o">=</span> <span class="n">imath_half_to_float</span> <span class="p">(</span><span class="n">h</span><span class="p">)</span>
<span class="p">}</span>

</pre></div>
</div>
<p>The only C-language operations supported for the <code class="docutils literal notranslate"><span class="pre">half</span></code> type are
conversion to and from <code class="docutils literal notranslate"><span class="pre">float</span></code>. No arithmetic operations are
currently implemented in the C interface.</p>
<dl class="cpp function">
<dt id="_CPPv419imath_half_to_float4half">
<span id="_CPPv319imath_half_to_float4half"></span><span id="_CPPv219imath_half_to_float4half"></span><span id="imath_half_to_float__half"></span><span class="target" id="half_8h_1ab0a258be1412e6e35ab70e213219f1bb"></span><em class="property">static</em> <em class="property">inline</em> float <code class="sig-name descname">imath_half_to_float</code><span class="sig-paren">(</span>half <em>h</em><span class="sig-paren">)</span><a class="headerlink" href="#_CPPv419imath_half_to_float4half" title="Permalink to this definition">¶</a><br /></dt>
<dd><p>Convert half to float. </p>
</dd></dl>

<dl class="cpp function">
<dt>
<span class="target" id="half_8h_1ab0a258be1412e6e35ab70e213219f1bb"></span><em class="property">static</em> <em class="property">inline</em> float <code class="sig-name descname">imath_half_to_float</code><span class="sig-paren">(</span>half <em>h</em><span class="sig-paren">)</span><br /></dt>
<dd><p>Convert half to float. </p>
</dd></dl>

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