git: openjdk/jdk16u: 8261022: Fix incorrect result of Math.abs() with char type

[Christoph Langer]

Changeset: 9d0adb8b
Author:    Christoph Langer <clanger at openjdk.org>
Date:      2021-02-19 12:31:11 +0000
URL:       https://git.openjdk.java.net/jdk16u/commit/9d0adb8b

8261022: Fix incorrect result of Math.abs() with char type

Backport-of: 7a2db858e0e81f2ba17c3554386bb6a833318b3d

! src/hotspot/share/opto/superword.cpp
+ test/hotspot/jtreg/compiler/vectorization/TestAbsCharVector.java