hg: jdk/submit: 8248830: C2: Optimize Rotate API on x86.

[jatin.bhateja at intel.com]

Changeset: ebe6d3b79edf
Author:    jbhateja
Date:      2020-08-09 02:03 +0530
URL:       https://hg.openjdk.java.net/jdk/submit/rev/ebe6d3b79edf

8248830: C2: Optimize Rotate API on x86.
Summary: Improved existing scalar rotate operations, added support for vector rotate operations using new AVX512 instructions.
Reviewed-by: vlivanov, kvn

! src/hotspot/cpu/x86/assembler_x86.cpp
! src/hotspot/cpu/x86/assembler_x86.hpp
! src/hotspot/cpu/x86/c2_MacroAssembler_x86.cpp
! src/hotspot/cpu/x86/c2_MacroAssembler_x86.hpp
! src/hotspot/cpu/x86/x86.ad
! src/hotspot/cpu/x86/x86_64.ad
! src/hotspot/share/adlc/formssel.cpp
! src/hotspot/share/opto/addnode.cpp
! src/hotspot/share/opto/addnode.hpp
! src/hotspot/share/opto/classes.hpp
! src/hotspot/share/opto/mulnode.cpp
! src/hotspot/share/opto/mulnode.hpp
! src/hotspot/share/opto/superword.cpp
! src/hotspot/share/opto/vectornode.cpp
! src/hotspot/share/opto/vectornode.hpp
! test/hotspot/jtreg/compiler/c2/cr6340864/TestIntVect.java
! test/hotspot/jtreg/compiler/c2/cr6340864/TestLongVect.java
+ test/hotspot/jtreg/compiler/intrinsics/TestRotate.java
+ test/micro/org/openjdk/bench/java/lang/RotateBenchmark.java