[11u] RFR(M): 8213754: PPC64: Add Intrinsics for isDigit/isLowerCase/isUpperCase/isWhitespace and 8215317: [GRAAL] unit test CheckGraalIntrinsics failed after 8213754

[Gustavo Romero]

Hi,

Could the following backport be reviewed, please?

Webrev: http://cr.openjdk.java.net/~gromero/8213754_8215317_jdk11u/v1/

This backport combines the following two changes in one:

8213754: PPC64: Add Intrinsics for isDigit/isLowerCase/isUpperCase/isWhitespace
https://bugs.openjdk.java.net/browse/JDK-8213754
http://hg.openjdk.java.net/jdk/jdk/rev/7384e00d5860

8215317: [GRAAL] unit test CheckGraalIntrinsics failed after 8213754
https://bugs.openjdk.java.net/browse/JDK-8215317
http://hg.openjdk.java.net/jdk/jdk/rev/108a161aed93

8213754 adds intrinsics that use new instructions introduced by POWER9 CPUs
to speed up methods isDigit, isLowerCase, isUpperCase, and isWhitespace.
Change 8213754 is mostly PPC64-only but it does touch shared code, for
instance, in order to introduce/adapt in the libraries the methods in
question so they can be properly intrinsified. In doing so it can break the
Graal test HotspotTest.java/CheckGraalIntrinsics.java that checks for intrinsics,
hence change 8215317, which adjusts that Graal test by including the new
intrinsics, is also backported and included in this change with 8213754.

8213754 applies almost cleanly: only a small tweak is necessary because the
hunk for ppc.ad file relies on some absent text around the change to be
applied. The absent text is from the Superword feature (a non-related
feature) that is not backported yet to 11u.

821531 was only adapted to match the inclusion of the intrinsics when JDK
is 11 or higher, instead of 12 or higher (original patch).

The copyright dates were updated in all touched files to include 2019.

This backportt was tested on POWER8 and POWER9 and no regressions were
observed.

This backport was also tested on x86_64 with
./test/hotspot/jtreg/compiler/{c1,c2,intrinsics} and
./test/hotspot/jtreg/compiler/graalunit (with Graal compiler enabled) and
no regressions were observed too.

I'm not sure which author I should keep since it's a combined changeset. Is
it ok to use me as the author?

I also merged the reviewers. Is that ok as well?

Thank you.

Best regards,
Gustavo