A user pointed out that we never documented the requirement to use %x in the ouptut template when VSX registers are used. This patch adds the necessary documentation. Is it ok to install in the trunk and the open release branches? 2015-06-09 Michael Meissner PR target/66474 * doc/md.texi (Machine Constraints): Document that on the PowerPC if you use a constraint that targets a VSX register, you must use %x in the template. -- Michael Meissner, IBM IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA email: meissner@linux.vnet.ibm.com, phone: +1 (978) 899-4797