8276799: Implementation of JEP 422: Linux/RISC-V Port

8282306: os::is_first_C_frame(frame*) crashes on invalid link access
8282477: [x86, aarch64] vmassert(_last_Java_pc == NULL, "already walkable"); fails with async profiler
8283865: riscv: Break down -XX:+UseRVB into seperate options for each bitmanip extension
8284068: riscv: should call Atomic::release_store in JavaThread::set_thread_state
8284937: riscv: should not allocate special register for temp
8285303: riscv: Incorrect register mask in call_native_base
8287418: riscv: Fix correctness issue of MacroAssembler::movptr
8297644: RISC-V: Compilation error when shenandoah is disabled
8291952: riscv: Remove PRAGMA_NONNULL_IGNORED
8285437: riscv: Fix MachNode size mismatch for MacroAssembler::verify_oops*
8285699: riscv: Provide information when hitting a HaltNode
8285711: riscv: RVC: Support disassembler show-bytes option
8287425: Remove unnecessary register push for MacroAssembler::check_klass_subtype_slow_path
8287552: riscv: Fix comment typo in li64
8287970: riscv: jdk/incubator/vector/*VectorTests failing
8290137: riscv: small refactoring for add_memory_int32/64
8290164: compiler/runtime/TestConstantsInError.java fails on riscv
8290496: riscv: Fix build warnings-as-errors with GCC 11
8291893: riscv: remove fence.i used in user space
8291947: riscv: fail to build after JDK-8290840
8292867: RISC-V: Simplify weak CAS return value handling
8293050: RISC-V: Remove redundant non-null assertions about macro-assembler
8293100: RISC-V: Need to save and restore callee-saved FloatRegisters in StubGenerator::generate_call_stub
8293474: RISC-V: Unify the way of moving function pointer
8293524: RISC-V: Use macro-assembler functions as appropriate
8293566: RISC-V: Clean up push and pop registers
8294012: RISC-V: get/put_native_u8 missing the case when address&7 is 6
8294083: RISC-V: Minimal build failed with --disable-precompiled-headers
8294086: RISC-V: Cleanup InstructionMark usages in the backend
8294087: RISC-V: RVC: Fix a potential alignment issue and add more alignment assertions for the patchable calls/nops
8294187: RISC-V: Unify all relocations for the backend into AbstractAssembler::relocate()
8294366: RISC-V: Partially mark out incompressible regions
8294430: RISC-V: Small refactoring for movptr_with_offset
8294492: RISC-V: Use li instead of patchable movptr at non-patchable callsites
8294679: RISC-V: Misc crash dump improvements
8295110: RISC-V: Mark out relocations as incompressible
8295270: RISC-V: Clean up and refactoring for assembler functions
8295396: RISC-V: Cleanup useless CompressibleRegions
8295926: RISC-V: C1: Fix LIRGenerator::do_LibmIntrinsic
8295968: RISC-V: Rename some assembler intrinsic functions for RVV 1.0
8296435: RISC-V: Small refactoring for increment/decrement
8296447: RISC-V: Make the operands order of vrsub_vx/vrsub_vi consistent with RVV 1.0 spec
8296448: RISC-V: Fix temp usages of heapbase register killed by MacroAssembler::en/decode_klass_not_null
8296602: RISC-V: improve performance of copy_memory stub
8296771: RISC-V: C2: assert(false) failed: bad AD file
8296916: RISC-V: Move some small macro-assembler functions to header file
8297359: RISC-V: improve performance of floating Max Min intrinsics
8297697: RISC-V: Add support for SATP mode detection
8301067: RISC-V: better error message when reporting unsupported satp modes
8297715: RISC-V: C2: Use single-bit instructions from the Zbs extension
8299168: RISC-V: Fix MachNode size mismatch for MacroAssembler::_verify_oops*
8299847: RISC-V: Improve PrintOptoAssembly output of CMoveI/L nodes
8300109: RISC-V: Improve code generation for MinI/MaxI nodes
8301033: RISC-V: Handle special cases for MinI/MaxI nodes for Zbb
8301036: RISC-V: Factor out functions baseOffset & baseOffset32 from MacroAssembler
8301153: RISC-V: pipeline class for several instructions is not set correctly
8301313: RISC-V: C2: assert(false) failed: bad AD file due to missing match rule
8301628: RISC-V: c2 fix pipeline class for several instructions
8301818: RISC-V: Factor out function mvw from MacroAssembler
8302114: RISC-V: Several foreign jtreg tests fail with debug build after JDK-8301818
8301852: RISC-V: Optimize class atomic when order is memory_order_relaxed
8302289: RISC-V: Use bgez instruction in arraycopy_simple_check when possible
8302776: RISC-V: Fix typo CSR_INSTERT to CSR_INSTRET
8304293: RISC-V: JDK-8276799 missed atomic intrinsic support for C1
8305006: Use correct register in riscv_enc_fast_unlock()
8305008: RISC-V: Factor out immediate checking functions from assembler_riscv.inline.hpp
8305112: RISC-V: Typo fix for RVC description
8305512: RISC-V: Enable RVC extension by default on supported hardware
8305728: RISC-V: Use bexti instruction to do single-bit testing
8306667: RISC-V: Fix storeImmN0 matching rule by using zr register
8307150: RISC-V: Remove remaining StoreLoad barrier with UseCondCardMark for Serial/Parallel GC
8307446: RISC-V: Improve performance of floating point to integer conversion
8307651: RISC-V: stringL_indexof_char instruction has wrong format string
8308089: [riscv-port-jdk17u] Intrinsify Unsafe.storeStoreFence
8308277: RISC-V: Improve vectorization of Match.sqrt() on floats
8308997: RISC-V: Sign extend when comparing 32-bit value with zero instead of testing the sign bit
8309427: [riscv-port-jdk17u] Remove unused RoundDoubleModeV C2 node
8305236: Some LoadLoad barriers in the interpreter are unnecessary after JDK-8220051
8285630: Fix a configure error in RISC-V cross build
8277417: C1 LIR instruction for load-klass

Reviewed-by: vkempik, goetz, shade, yadongwang, fjiang, luhenry
Backport-of: 5905b02c0e2643ae8d097562f181953f6c88fc89

Author: RealFYang

make/autoconf/build-aux/config.sub

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# Copyright (c) 2014, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2014, 2022, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -46,6 +46,13 @@ if echo $* | grep pc-msys >/dev/null ; then
     exit
 fi
 
+# Canonicalize for riscv which autoconf-config.sub doesn't handle
+if echo $* | grep '^riscv\(32\|64\)-linux' >/dev/null ; then
+    result=`echo $@ | sed 's/linux/unknown-linux/'`
+    echo $result
+    exit
+fi
+
 # Filter out everything that doesn't begin with "aarch64-"
 if ! echo $* | grep '^aarch64-' >/dev/null ; then
     . $DIR/autoconf-config.sub "$@"
@@ -78,4 +85,3 @@ result=`echo $result | sed "s/^arm-/aarch64-/"`
 
 echo $result
 exit $exitcode
-

make/autoconf/jvm-features.m4

@@ -311,7 +311,8 @@ AC_DEFUN_ONCE([JVM_FEATURES_CHECK_SHENANDOAHGC],
     AC_MSG_CHECKING([if platform is supported by Shenandoah])
     if test "x$OPENJDK_TARGET_CPU_ARCH" = "xx86" || \
         test "x$OPENJDK_TARGET_CPU" = "xaarch64" || \
-        test "x$OPENJDK_TARGET_CPU" = "xppc64le"; then
+        test "x$OPENJDK_TARGET_CPU" = "xppc64le" || \
+        test "x$OPENJDK_TARGET_CPU" = "xriscv64"; then
       AC_MSG_RESULT([yes])
     else
       AC_MSG_RESULT([no, $OPENJDK_TARGET_CPU])
@@ -361,7 +362,8 @@ AC_DEFUN_ONCE([JVM_FEATURES_CHECK_ZGC],
         AC_MSG_RESULT([no, $OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU])
         AVAILABLE=false
       fi
-    elif test "x$OPENJDK_TARGET_CPU" = "xppc64le"; then
+    elif test "x$OPENJDK_TARGET_CPU" = "xppc64le" || \
+        test "x$OPENJDK_TARGET_CPU" = "xriscv64"; then
       if test "x$OPENJDK_TARGET_OS" = "xlinux"; then
         AC_MSG_RESULT([yes])
       else