aoqi@1: /*
aoqi@1:  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@1:  * Copyright (c) 2015, 2016, Loongson Technology. All rights reserved.
aoqi@1:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@1:  *
aoqi@1:  * This code is free software; you can redistribute it and/or modify it
aoqi@1:  * under the terms of the GNU General Public License version 2 only, as
aoqi@1:  * published by the Free Software Foundation.
aoqi@1:  *
aoqi@1:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@1:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@1:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@1:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@1:  * accompanied this code).
aoqi@1:  *
aoqi@1:  * You should have received a copy of the GNU General Public License version
aoqi@1:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@1:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@1:  *
aoqi@1:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@1:  * or visit www.oracle.com if you need additional information or have any
aoqi@1:  * questions.
aoqi@1:  *
aoqi@1:  */
aoqi@1: 
aoqi@1: #include "precompiled.hpp"
aoqi@1: #include "asm/macroAssembler.hpp"
aoqi@1: #include "asm/macroAssembler.inline.hpp"
aoqi@1: #include "code/icBuffer.hpp"
aoqi@1: #include "gc_interface/collectedHeap.inline.hpp"
aoqi@1: #include "interpreter/bytecodes.hpp"
aoqi@1: #include "memory/resourceArea.hpp"
aoqi@1: #include "nativeInst_mips.hpp"
aoqi@1: #include "oops/oop.inline.hpp"
aoqi@1: #include "oops/oop.inline2.hpp"
aoqi@1: 
aoqi@1: int InlineCacheBuffer::ic_stub_code_size() {
aoqi@1:   return NativeMovConstReg::instruction_size +
aoqi@1:          NativeGeneralJump::instruction_size +
aoqi@1:          1;
aoqi@1:   // so that code_end can be set in CodeBuffer
aoqi@1:   // 64bit 15 = 6 + 8 bytes + 1 byte
aoqi@1:   // 32bit 7 = 2 + 4 bytes + 1 byte
aoqi@1: }
aoqi@1: 
aoqi@1: 
aoqi@1: // we use T1 as cached oop(klass) now. this is the target of virtual call,
aoqi@1: // when reach here, the receiver in T0
aoqi@1: // refer to shareRuntime_mips.cpp,gen_i2c2i_adapters 
aoqi@1: void InlineCacheBuffer::assemble_ic_buffer_code(address code_begin, void* cached_value, address entry_point) {
aoqi@1:   ResourceMark rm;
aoqi@1:   CodeBuffer      code(code_begin, ic_stub_code_size());
aoqi@1:   MacroAssembler* masm            = new MacroAssembler(&code);
aoqi@1:   // note: even though the code contains an embedded oop, we do not need reloc info
aoqi@1:   // because
aoqi@1:   // (1) the oop is old (i.e., doesn't matter for scavenges)
aoqi@1:   // (2) these ICStubs are removed *before* a GC happens, so the roots disappear
aoqi@1: //  assert(cached_oop == NULL || cached_oop->is_perm(), "must be perm oop");
aoqi@1: #define __ masm->
aoqi@1: #ifndef _LP64
aoqi@1:   __ lui(T1, Assembler::split_high((int)cached_value));
aoqi@1:   __ addiu(T1, T1, Assembler::split_low((int)cached_value));
aoqi@1: 
aoqi@1:   __ lui(T9, Assembler::split_high((int)entry_point));
aoqi@1:   __ addiu(T9, T9, Assembler::split_low((int)entry_point));
aoqi@1: #else
aoqi@1:   __ li48(T1, (long)cached_value);
aoqi@1: 
aoqi@1:   __ li48(T9, (long)entry_point);
aoqi@1: #endif
aoqi@1:   __ jr(T9);
aoqi@1:   __ delayed()->nop();
aoqi@1:   __ flush();
aoqi@1: #undef __ 
aoqi@1: }
aoqi@1: 
aoqi@1: 
aoqi@1: address InlineCacheBuffer::ic_buffer_entry_point(address code_begin) {
aoqi@1:   NativeMovConstReg* move = nativeMovConstReg_at(code_begin);   // creation also verifies the object
aoqi@1:   //NativeJump*        jump = nativeJump_at(move->next_instruction_address());
aoqi@1:   NativeGeneralJump*        jump = nativeGeneralJump_at(move->next_instruction_address());
aoqi@1:   return jump->jump_destination();
aoqi@1: }
aoqi@1: 
aoqi@1: void* InlineCacheBuffer::ic_buffer_cached_value(address code_begin) {
aoqi@1:   // creation also verifies the object
aoqi@1:   NativeMovConstReg* move = nativeMovConstReg_at(code_begin);
aoqi@1:   // Verifies the jump
aoqi@1:   //NativeJump*        jump = nativeJump_at(move->next_instruction_address());
aoqi@1:   NativeGeneralJump*        jump = nativeGeneralJump_at(move->next_instruction_address());
aoqi@1:   void* o= (void*)move->data();  
aoqi@1:   return o;
aoqi@1: }