Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.

  * Copyright (c) 2015, 2016, 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::_cpu;

 int VM_Version::_model;

 int VM_Version::_stepping;

 int VM_Version::_cpuFeatures;

 const char*           VM_Version::_features_str = "";

 VM_Version::CpuidInfo VM_Version::_cpuid_info   = { 0, };

 static BufferBlob* stub_blob;

 static const int stub_size = 300;

 extern "C" {

   typedef void (*getPsrInfo_stub_t)(void*);

 }

 static getPsrInfo_stub_t getPsrInfo_stub = NULL;

 */

 int VM_Version::_features = VM_Version::unknown_m;

 const char* VM_Version::_features_str = "";

 /*

 class VM_Version_StubGenerator: public StubCodeGenerator {

  public:

   VM_Version_StubGenerator(CodeBuffer *c) : StubCodeGenerator(c) {}

   address generate_getPsrInfo() {

   };

 };

 void VM_Version::get_processor_features() {

 }

 */

 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//////////////////

 #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;

     }

   }

 /*

  *

  * 2017/5/17:

  * 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(UseCountTrailingZerosInstruction)) {

       FLAG_SET_DEFAULT(UseCountTrailingZerosInstruction, 1);

     }

   } else if (UseCountTrailingZerosInstruction) {

     if (!FLAG_IS_DEFAULT(UseCountTrailingZerosInstruction))

       warning("Only 3A2000/3000 CPUs support UseCountTrailingZerosInstruction");

     FLAG_SET_DEFAULT(UseCountTrailingZerosInstruction, 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 (TieredCompilation) {

     if (!FLAG_IS_DEFAULT(TieredCompilation))

       warning("TieredCompilation not supported");

     FLAG_SET_DEFAULT(TieredCompilation, false);

   }

   if (UseG1GC) {

     if (!FLAG_IS_DEFAULT(UseG1GC))

       warning("UseG1GC not supported");

     FLAG_SET_DEFAULT(UseG1GC, 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" : ""),

               (is_gs464v() ? ", 3B1500" : "" ),

               (is_gs464e() ? ", 3A2000/3A3000" : ""),

               (UseLoongsonISA ? ", UseLoongsonISA" : ""),

               (UseCountTrailingZerosInstruction ? ", UseCountTrailingZerosInstruction" : ""),

               (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);

   }

   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;

 }