RFR: 8179444: AArch64: Put zero_words on a diet

[Andrew Dinn]

Ok, this ought not strictly to count as an official review (as I am not
a jdk9/10 reviewer) but I have i) eyeballed the code to my satisfaction
and ii)  successfully built and tested a patched jdk10 (by running java
Hello, javac Hello.java and netbeans).

Ship it!

regards,


Andrew Dinn
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Senior Principal Software Engineer
Red Hat UK Ltd
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