8029101 is adding IRIW conformance on non-multiple-copy-atomic platforms as part of the PPC64 port. As the client compiler is not presently supported on 64-bit there is no IRIW support in the C1 code. This RFE covers the addition of that support for C1.
See discussion thread commencing:
http://mail.openjdk.java.net/pipermail/hotspot-dev/2013-November/011803.html
and continuing:
http://mail.openjdk.java.net/pipermail/hotspot-dev/2013-December/011888.html
http://mail.openjdk.java.net/pipermail/hotspot-dev/2014-January/012130.html
http://mail.openjdk.java.net/pipermail/hotspot-dev/2014-January/012186.html