Add BOOST_HAS_FLOAT128 for compilers that support __float128 as a distinct type.

doc/html/boost_config/boost_macro_reference.html

@@ -1427,6 +1427,25 @@
               </td>
 </tr>
 <tr>
+<td>
+                <p>
+                  <code class="computeroutput"><span class="identifier">BOOST_HAS_FLOAT128</span></code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Compiler
+                </p>
+              </td>
+<td>
+                <p>
+                  The compiler has <code class="computeroutput"><span class="identifier">__float128</span></code>
+                  as a native type which is distinct from all the regular C++ floating
+                  point types.
+                </p>
+              </td>
+</tr>
+<tr>
 <td>
                 <p>
                   <code class="computeroutput"><span class="identifier">BOOST_HAS_FTIME</span></code>

doc/html/index.html

@@ -988,7 +988,7 @@
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 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
-<td align="left"><p><small>Last revised: July 07, 2015 at 10:18:34 GMT</small></p></td>
+<td align="left"><p><small>Last revised: August 13, 2015 at 16:11:58 GMT</small></p></td>
 <td align="right"><div class="copyright-footer"></div></td>
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