git: openjdk/jdk17u-dev: 8277846: Implement fast-path for ASCII-compatible CharsetEncoders on ppc64

[Martin Doerr]

Changeset: 3c279bd4
Author:    Martin Doerr <mdoerr at openjdk.org>
Date:      2022-01-14 10:45:15 +0000
URL:       https://git.openjdk.java.net/jdk17u-dev/commit/3c279bd42c362f62d90b4225c265c24054c9c55d

8277846: Implement fast-path for ASCII-compatible CharsetEncoders on ppc64

Backport-of: a5f2a58ba4ac25f4bd66f1f1f4c036a4f0024229

! src/hotspot/cpu/ppc/c2_MacroAssembler_ppc.cpp
! src/hotspot/cpu/ppc/c2_MacroAssembler_ppc.hpp
! src/hotspot/cpu/ppc/matcher_ppc.hpp
! src/hotspot/cpu/ppc/ppc.ad