jdk8-mips64-public/hotspot: src/cpu/mips/vm/vm_version

src/cpu/mips/vm/vm_version_mips.cpp@814e9e335067 (annotated)

src/cpu/mips/vm/vm_version_mips.cpp

Tue, 05 Mar 2019 17:00:17 +0800

author: aoqi
date: Tue, 05 Mar 2019 17:00:17 +0800
changeset 9459: 814e9e335067
parent 9251: 1ccc5a3b3671
child 9578: 191e90d9878f
permissions: -rw-r--r--

#8573 Cleanup: x86 registers in comments; comment style; deadcode
Reviewed-by: zhaixiang

 /*
  * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2015, 2019, Loongson Technology. 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
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "asm/macroAssembler.hpp"
 #include "asm/macroAssembler.inline.hpp"
 #include "memory/resourceArea.hpp"
 #include "runtime/java.hpp"
 #include "runtime/stubCodeGenerator.hpp"
 #include "vm_version_mips.hpp"
 #ifdef TARGET_OS_FAMILY_linux
 # include "os_linux.inline.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_solaris
 # include "os_solaris.inline.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_windows
 # include "os_windows.inline.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_bsd
 # include "os_bsd.inline.hpp"
 #endif
 int VM_Version::_features = VM_Version::unknown_m;
 const char* VM_Version::_features_str = "";
 void VM_Version::initialize() {
   _features = determine_features();
   //no need, Abstract_VM_Version already define it as false
   _supports_cx8 = true;
   //////////////////////add some other feature here//////////////////
   if (UseG1GC && FLAG_IS_DEFAULT(MaxGCPauseMillis)) {
     FLAG_SET_CMDLINE(uintx, MaxGCPauseMillis, 650);
   }
 #ifdef COMPILER2
   if (MaxVectorSize > 0) {
     if (!is_power_of_2(MaxVectorSize)) {
       warning("MaxVectorSize must be a power of 2");
       MaxVectorSize = 8;
     }
     if (MaxVectorSize > 0 && supports_ps()) {
       MaxVectorSize = 8;
     }
   }
   //
   // Vector optimization of MIPS works in most cases, but cannot pass hotspot/test/compiler/6340864/TestFloatVect.java.
   // Vector optimization was closed by default.
   // The reasons:
   // 1. The kernel does not have emulation of PS instructions yet, so the emulation of PS instructions must be done in JVM, see JVM_handle_linux_signal.
   // 2. It seems the gcc4.4.7 had some bug related to ucontext_t, which is used in signal handler to emulate PS instructions.
   //
   if (FLAG_IS_DEFAULT(MaxVectorSize)) {
     MaxVectorSize = 0;
   }
   if (is_gs464e()) {
     if (FLAG_IS_DEFAULT(UseCountTrailingZerosInstructionMIPS64)) {
       FLAG_SET_DEFAULT(UseCountTrailingZerosInstructionMIPS64, 1);
     }
   } else if (UseCountTrailingZerosInstructionMIPS64) {
     if (!FLAG_IS_DEFAULT(UseCountTrailingZerosInstructionMIPS64))
       warning("Only 3A2000/3000 CPUs support UseCountTrailingZerosInstructionMIPS64");
     FLAG_SET_DEFAULT(UseCountTrailingZerosInstructionMIPS64, 0);
   }
 #endif
   UseSSE = 0; // Only on x86 and x64
   if (is_loongson()) {
     if (FLAG_IS_DEFAULT(UseLoongsonISA)) {
       FLAG_SET_DEFAULT(UseLoongsonISA, 1);
     }
   } else if (UseLoongsonISA) {
     if (!FLAG_IS_DEFAULT(UseLoongsonISA))
       warning("Only Loongson CPUs support LoongISA");
     FLAG_SET_DEFAULT(UseLoongsonISA, 0);
   }
   if (is_gs464e()) {
     if (FLAG_IS_DEFAULT(Use3A2000)) {
       FLAG_SET_DEFAULT(Use3A2000, 1);
     }
   } else if (Use3A2000) {
     if (!FLAG_IS_DEFAULT(Use3A2000))
       warning("Only 3A2000/3000 CPUs support this option");
     FLAG_SET_DEFAULT(Use3A2000, 0);
   }
   if (is_gs464()) {
     if (FLAG_IS_DEFAULT(UseSyncLevel)) {
       FLAG_SET_DEFAULT(UseSyncLevel, 1000);
     }
   }
   if (is_gs464e()) {
     if (FLAG_IS_DEFAULT(UseSyncLevel)) {
       FLAG_SET_DEFAULT(UseSyncLevel, 2000);
     }
   }
   if (TieredCompilation) {
     if (!FLAG_IS_DEFAULT(TieredCompilation))
       warning("TieredCompilation not supported");
     FLAG_SET_DEFAULT(TieredCompilation, false);
   }
   char buf[256];
   jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s",
               (has_l2_cache() ? ", has_l2_cache" : ""),
               (has_16k_page() ? ", has_16k_page" : ""),
               (is_loongson()  ? ", on_loongson"  : ""),
               (is_gs464() ?  ", 3A1000/3B1500" : ""),
               (is_gs464e() ? ", 3A2000/3A3000/3B2000/3B3000" : ""),
               (is_gs264() ?  ", 2K1000" : ""),
               (UseLoongsonISA ? ", UseLoongsonISA" : ""),
               (UseCountTrailingZerosInstructionMIPS64 ? ", UseCountTrailingZerosInstructionMIPS64" : ""),
               (Use3A2000 ? ", Use3A2000" : ""));
   // buf is started with ", " or is empty
   _features_str = strdup(strlen(buf) > 2 ? buf + 2 : buf);
   if (FLAG_IS_DEFAULT(AllocatePrefetchStyle)) {
     FLAG_SET_DEFAULT(AllocatePrefetchStyle, 1);
   }
   if (FLAG_IS_DEFAULT(AllocatePrefetchLines)) {
     FLAG_SET_DEFAULT(AllocatePrefetchLines, 1);
   }
   if (FLAG_IS_DEFAULT(AllocatePrefetchStepSize)) {
     FLAG_SET_DEFAULT(AllocatePrefetchStepSize, 64);
   }
   if (FLAG_IS_DEFAULT(AllocatePrefetchDistance)) {
     FLAG_SET_DEFAULT(AllocatePrefetchDistance, 64);
   }
   if (FLAG_IS_DEFAULT(AllocateInstancePrefetchLines)) {
     FLAG_SET_DEFAULT(AllocateInstancePrefetchLines, 1);
   }
   if (UseSHA) {
     warning("SHA instructions are not available on this CPU");
     FLAG_SET_DEFAULT(UseSHA, false);
   }
   if (UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics) {
     warning("SHA intrinsics are not available on this CPU");
     FLAG_SET_DEFAULT(UseSHA1Intrinsics, false);
     FLAG_SET_DEFAULT(UseSHA256Intrinsics, false);
     FLAG_SET_DEFAULT(UseSHA512Intrinsics, false);
   }
   NOT_PRODUCT( if (PrintMiscellaneous && Verbose) print_features(); );
 }
 void VM_Version::print_features() {
   tty->print_cr("Version:%s", cpu_features());
 }
 int VM_Version::determine_features() {
   //////////////////////add some other feature here//////////////////
   int features = platform_features(unknown_m);
   //spt_16k_page_m;
   return features;
 }
 static int saved_features = 0;
 void VM_Version::allow_all() {
   saved_features = _features;
   _features      = all_features_m;
 }
 void VM_Version::revert() {
   _features = saved_features;
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/mips/vm/vm_version_mips.cpp@814e9e335067 (annotated)

src/cpu/mips/vm/vm_version_mips.cpp