isqrt (uint16_t?? n) in C++ ]</span></div><div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;{</div><div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;    <span class="keyword">register</span> uint16_t <span class="comment">// OR register uint16_t OR register uint8_t - respectively</span></div><div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;    root, remainder, place;</div><div class="line"><a name="l00153"></a><span class="