Add ppc related stuff.

index.html

@@ -55,9 +55,10 @@ implementations, which in turn derive from <a href="http://www.netlib.org/fdlibm
 <h3>
 <a id="platform-support" class="anchor" href="#platform-support" aria-hidden="true"><span class="octicon octicon-link"></span></a>Platform support</h3>
 
-<p>OpenLibm builds on Linux, Mac OS X, Windows, and FreeBSD.  It
-builds with both, GCC and clang. Although largely tested on x86, it
-also includes experimental support for ARM.
+<p>OpenLibm builds on Linux, Mac OS X, Windows, FreeBSD, and
+  OpenBSD. It builds with both GCC and clang. Although largely
+  tested and widely used on x86 architectures, openlibm also
+  supports ARM and powerPC.
 
 <h3>
 <a id="other-relevant-projects" class="anchor" href="#other-relevant-projects" aria-hidden="true"><span class="octicon octicon-link"></span></a>Other relevant projects</h3>
@@ -69,6 +70,12 @@ also includes experimental support for ARM.
   <li> <a href="https://software.intel.com/sites/products/documentation/doclib/mkl_sa/112/vml/vmldata.htm">Intel VML</a>: Intel's Vector Math Library</li>
 </ol>
 
+<h3>
+<a id="Acknowledgements" class="anchor" href="#Acknowledgements" aria-hidden="true"><span class="octicon octicon-link"></span></a>Acknowledgements</h3>
+
+<p>PowerPC support for OpenLibm was graciously sponsored by IBM.
+
+
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