s 2^-W.</span></div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;<span class="comment">// Let M be the number of mantissa bits in Float.</span></div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;<span class="comment">// If W&gt;M  then the largest value retured is 1.0.</span></div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;<span class="comment">// If W&lt;=M then the largest value returned is the largest Floa