[aarch64-port-dev ] RFR(XXS): 8201185 - AARCH64: bfm instruction encoding hits assert on zero register

[Dmitrij Pochepko]

Hi,

please review small fix for  8201185 - AARCH64: bfm instruction encoding 
hits assert on zero register

bfm* instuctions encoding hits assert when using zero register as 
source, which should be allowed.

Fix is trivial: change "general register encoding" call (rf) to 
"zero-or-general register encoding" call (zrf).


CR: https://bugs.openjdk.java.net/browse/JDK-8201185

webrev: http://cr.openjdk.java.net/~dpochepk/8201185/webrev.01/


I've checked this patch (and actually found this bug) by creating 
intrinsic with such encoding usage.


Thanks,

Dmitrij