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

     1 /*

     2  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.

     3  * Copyright (c) 2015, 2016, Loongson Technology. All rights reserved.

     4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     5  *

     6  * This code is free software; you can redistribute it and/or modify it

     7  * under the terms of the GNU General Public License version 2 only, as

     8  * published by the Free Software Foundation.

     9  *

    10  * This code is distributed in the hope that it will be useful, but WITHOUT

    11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    13  * version 2 for more details (a copy is included in the LICENSE file that

    14  * accompanied this code).

    15  *

    16  * You should have received a copy of the GNU General Public License version

    17  * 2 along with this work; if not, write to the Free Software Foundation,

    18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    19  *

    20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    21  * or visit www.oracle.com if you need additional information or have any

    22  * questions.

    23  *

    24  */

    26 #include "precompiled.hpp"

    27 #include "asm/macroAssembler.hpp"

    28 #include "asm/macroAssembler.inline.hpp"

    29 #include "code/icBuffer.hpp"

    30 #include "gc_interface/collectedHeap.inline.hpp"

    31 #include "interpreter/bytecodes.hpp"

    32 #include "memory/resourceArea.hpp"

    33 #include "nativeInst_mips.hpp"

    34 #include "oops/oop.inline.hpp"

    35 #include "oops/oop.inline2.hpp"

    37 int InlineCacheBuffer::ic_stub_code_size() {

    38   return NativeMovConstReg::instruction_size +

    39          NativeGeneralJump::instruction_size +

    40          1;

    41   // so that code_end can be set in CodeBuffer

    42   // 64bit 15 = 6 + 8 bytes + 1 byte

    43   // 32bit 7 = 2 + 4 bytes + 1 byte

    44 }

    47 // we use T1 as cached oop(klass) now. this is the target of virtual call,

    48 // when reach here, the receiver in T0

    49 // refer to shareRuntime_mips.cpp,gen_i2c2i_adapters

    50 void InlineCacheBuffer::assemble_ic_buffer_code(address code_begin, void* cached_value, address entry_point) {

    51   ResourceMark rm;

    52   CodeBuffer      code(code_begin, ic_stub_code_size());

    53   MacroAssembler* masm            = new MacroAssembler(&code);

    54   // note: even though the code contains an embedded oop, we do not need reloc info

    55   // because

    56   // (1) the oop is old (i.e., doesn't matter for scavenges)

    57   // (2) these ICStubs are removed *before* a GC happens, so the roots disappear

    58 //  assert(cached_oop == NULL || cached_oop->is_perm(), "must be perm oop");

    59 #define __ masm->

    60 #ifndef _LP64

    61   __ lui(T1, Assembler::split_high((int)cached_value));

    62   __ addiu(T1, T1, Assembler::split_low((int)cached_value));

    64   __ lui(T9, Assembler::split_high((int)entry_point));

    65   __ addiu(T9, T9, Assembler::split_low((int)entry_point));

    66 #else

    67   __ li48(T1, (long)cached_value);

    69   __ li48(T9, (long)entry_point);

    70 #endif

    71   __ jr(T9);

    72   __ delayed()->nop();

    73   __ flush();

    74 #undef __

    75 }

    78 address InlineCacheBuffer::ic_buffer_entry_point(address code_begin) {

    79   NativeMovConstReg* move = nativeMovConstReg_at(code_begin);   // creation also verifies the object

    80   //NativeJump*        jump = nativeJump_at(move->next_instruction_address());

    81   NativeGeneralJump*        jump = nativeGeneralJump_at(move->next_instruction_address());

    82   return jump->jump_destination();

    83 }

    85 void* InlineCacheBuffer::ic_buffer_cached_value(address code_begin) {

    86   // creation also verifies the object

    87   NativeMovConstReg* move = nativeMovConstReg_at(code_begin);

    88   // Verifies the jump

    89   //NativeJump*        jump = nativeJump_at(move->next_instruction_address());

    90   NativeGeneralJump*        jump = nativeGeneralJump_at(move->next_instruction_address());

    91   void* o= (void*)move->data();

    92   return o;

    93 }

src/cpu/mips/vm/icBuffer_mips.cpp@2d8a650513c2