git: openjdk/jdk: jdk25: 8360405: [PPC64] some environments don't support mfdscr instruction

[Martin Doerr]

Changeset: 274a2dd7
Branch: jdk25
Author:    Martin Doerr <mdoerr at openjdk.org>
Date:      2025-06-26 09:14:18 +0000
URL:       https://git.openjdk.org/jdk/commit/274a2dd729875f98401ef845fbc69ad1049a0c1f

8360405: [PPC64] some environments don't support mfdscr instruction

Reviewed-by: haosun, rrich
Backport-of: f71d64fbeb0c196fd825241ff86d3a103d05a842

! src/hotspot/cpu/ppc/macroAssembler_ppc.cpp
! src/hotspot/cpu/ppc/stubGenerator_ppc.cpp
! src/hotspot/cpu/ppc/vm_version_ppc.cpp
! src/hotspot/cpu/ppc/vm_version_ppc.hpp