RFR(XS) 8224558: x86 Fix replicateB encoding

Deshpande, Vivek R vivek.r.deshpande at intel.com
Wed May 22 00:12:37 UTC 2019

Hi All

The encoding for replicateB in x86.ad uses dst register as one of the source without initializing, when the source for the scalar value is memory.
This leads to wrong replication in the resulting vector.
I have a fix for the bug in this webrev:
I have created following JBS Entry:

Kindly requesting review for the patch.

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