eyword">inline</span> uint64_t twinmask(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> x) {</div><div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;    <span class="keywordflow">return</span> ((x^4)&amp;6)&gt;&gt;1;</div><div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;  }</div><div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;</div><div class="line"><a name="l00145"></a><span class="lineno">