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

src/cpu/mips/vm/vtableStubs_mips_64.cpp@2d8a650513c2 (annotated)

src/cpu/mips/vm/vtableStubs_mips_64.cpp

Fri, 29 Apr 2016 00:06:10 +0800

author: aoqi
date: Fri, 29 Apr 2016 00:06:10 +0800
changeset 1: 2d8a650513c2
child 6880: 52ea28d233d2
permissions: -rw-r--r--

Added MIPS 64-bit port.

 /*
  * Copyright (c) 2003, 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 "code/vtableStubs.hpp"
 #include "interp_masm_mips_64.hpp"
 #include "memory/resourceArea.hpp"
 //#include "oops/InstanceKlass.hpp"
 #include "oops/klassVtable.hpp"
 #include "runtime/sharedRuntime.hpp"
 #include "vmreg_mips.inline.hpp"
 #ifdef COMPILER2
 #include "opto/runtime.hpp"
 #endif
 // machine-dependent part of VtableStubs: create VtableStub of correct size and
 // initialize its code
 #define __ masm->
 #ifndef PRODUCT
 extern "C" void bad_compiled_vtable_index(JavaThread* thread,
                                           oop receiver,
                                           int index);
 #endif
 // used by compiler only;  reciever in T0.
 // used registers :
 // Rmethod : receiver klass & method
 // NOTE: If this code is used by the C1, the receiver_location is always 0.
 // when reach here, receiver in T0, klass in T8
 VtableStub* VtableStubs::create_vtable_stub(int vtable_index) {
 	const int gs2_code_length = VtableStub::pd_code_size_limit(true);
 	//VtableStub* s = new(gs2_code_length) VtableStub(true, vtable_index, receiver_location);
 	//FIXME aoqi
 	VtableStub* s = new(gs2_code_length) VtableStub(true, vtable_index);
 	ResourceMark rm;
         CodeBuffer cb(s->entry_point(), gs2_code_length);
 	MacroAssembler* masm = new MacroAssembler(&cb);
 	Register t1 = T8, t2 = Rmethod;
 #ifndef PRODUCT
 //#ifdef COMPILER2
 	if (CountCompiledCalls) {
 		__ li(AT, SharedRuntime::nof_megamorphic_calls_addr());
 	        __ lw(t1, AT , 0);
 		__ addiu(t1, t1, 1);
 		__ sw(t1, AT,0);
 	}
 //#endif
 #endif
      // get receiver (need to skip return address on top of stack)
      //assert(receiver_location == T0->as_VMReg(), "receiver expected in T0");
      // get receiver klass
 	address npe_addr = __ pc();
 	//__ ld_ptr(t1, T0, oopDesc::klass_offset_in_bytes());
 	//add for compressedoops
 	__ load_klass(t1, T0);
 	// compute entry offset (in words)
 	int entry_offset = InstanceKlass::vtable_start_offset() + vtable_index*vtableEntry::size();
 #ifndef PRODUCT
 	if (DebugVtables) {
 		Label L;
 		// check offset vs vtable length
 		__ lw(t2, t1, InstanceKlass::vtable_length_offset()*wordSize);
 		assert(Assembler::is_simm16(vtable_index*vtableEntry::size()), "change this code");
 		__ move(AT, vtable_index*vtableEntry::size());
 		__ slt(AT, AT, t2);
 		__ bne(AT, R0, L);
 		__ delayed()->nop();
 		__ move(A2, vtable_index);
 		__ move(A1, A0);
 		__ call_VM(noreg, CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), A1, A2);
 		__ bind(L);
 	}
 #endif // PRODUCT
 	// load methodOop and target address
 	const Register method = Rmethod;
 	__ ld_ptr(method, t1,  entry_offset*wordSize + vtableEntry::method_offset_in_bytes());
 	if (DebugVtables) {
 	      Label L;
 	      __ beq(method, R0, L);
 	      __ delayed()->nop();
 	      // __ cmpl(Address(method, Method::from_compiled_offset()), NULL_WORD);
 	      __ lw(AT, method,in_bytes(Method::from_compiled_offset()));
 	      //__ jcc(Assembler::notZero, L);
 	      __ bne(AT, R0, L);
               __ delayed()->nop();
 	      __ stop("Vtable entry is NULL");
 	      __ bind(L);
       }
 	// T8: receiver klass
 	// T0: receiver
 	// Rmethod: methodOop
 	// T9: entry
 	address ame_addr = __ pc();
          __ ld_ptr(T9, method,in_bytes(Method::from_compiled_offset()));
          __ jr(T9);
          __ delayed()->nop();
 	masm->flush();
 	s->set_exception_points(npe_addr, ame_addr);
 	return s;
 }
 // i am not sure which register to contain Interface, now i just assume A1. FIXME
 // used registers :
 //	T1 T2
 // when reach here, the receiver in T0, klass in T1
 VtableStub* VtableStubs::create_itable_stub(int vtable_index) {
   // Note well: pd_code_size_limit is the absolute minimum we can get
   // away with.  If you add code here, bump the code stub size
   // returned by pd_code_size_limit!
    const int gs2_code_length = VtableStub::pd_code_size_limit(false);
    VtableStub* s = new(gs2_code_length) VtableStub(false, vtable_index);
    ResourceMark rm;
    CodeBuffer cb(s->entry_point(), gs2_code_length);
    MacroAssembler* masm = new MacroAssembler(&cb);
 // we T8,T9 as temparary register, they are free from register allocator
      Register t1 = T8, t2 = T2;
 	// Entry arguments:
 	//  T1: Interface
 	//  T0: Receiver
 #ifndef PRODUCT
   if (CountCompiledCalls) {
 	  //__ incl(Address((int)SharedRuntime::nof_megamorphic_calls_addr(), relocInfo::none));
             __ li(AT, SharedRuntime::nof_megamorphic_calls_addr());
             __ lw(T8, AT, 0);
 	    __ addi(T8, T8,1);
             __ sw(T8, AT, 0);
   }
 #endif /* PRODUCT */
 	//assert(receiver_location == T0->as_VMReg(), "receiver expected in T0");
 	// get receiver klass (also an implicit null-check)
 	address npe_addr = __ pc();
 	//__ ld_ptr(t1, T0, oopDesc::klass_offset_in_bytes());
 	//add for compressedoops
 	__ load_klass(t1, T0);
 	// compute itable entry offset (in words)
 	const int base = InstanceKlass::vtable_start_offset() * wordSize;
 	assert(vtableEntry::size() * wordSize == 8, "adjust the scaling in the code below");
 	assert(Assembler::is_simm16(base), "change this code");
 	__ daddi(t2, t1, base);
 	assert(Assembler::is_simm16(InstanceKlass::vtable_length_offset() * wordSize), "change this code");
 	__ lw(AT, t1, InstanceKlass::vtable_length_offset() * wordSize);
 	__ dsll(AT, AT, Address::times_8);
 	__ dadd(t2, t2, AT);
 	if (HeapWordsPerLong > 1) {
 		__ round_to(t2, BytesPerLong);
 	}
 	Label hit, entry;
    	assert(Assembler::is_simm16(itableOffsetEntry::size() * wordSize), "change this code");
 	__ bind(entry);
 #ifdef ASSERT
 	// Check that the entry is non-null
 	if (DebugVtables) {
 		Label L;
 		assert(Assembler::is_simm16(itableOffsetEntry::interface_offset_in_bytes()), "change this code");
 		__ lw(AT, t1, itableOffsetEntry::interface_offset_in_bytes());
 		__ bne(AT, R0, L);
 		__ delayed()->nop();
 		__ stop("null entry point found in itable's offset table");
 		__ bind(L);
 	}
 #endif
 	assert(Assembler::is_simm16(itableOffsetEntry::interface_offset_in_bytes()), "change this code");
 	__ ld_ptr(AT, t2, itableOffsetEntry::interface_offset_in_bytes());
 	__ bne(AT, T1, entry);
 	__ delayed()->addi(t2, t2, itableOffsetEntry::size() * wordSize);
 	// We found a hit, move offset into T9
 	__ ld_ptr(t2, t2, itableOffsetEntry::offset_offset_in_bytes() - itableOffsetEntry::size() * wordSize);
 	// Compute itableMethodEntry.
 	const int method_offset = (itableMethodEntry::size() * wordSize * vtable_index) +
 		itableMethodEntry::method_offset_in_bytes();
   // Get methodOop and entrypoint for compiler
 //  const Register method = ebx;
       const Register method = Rmethod;
 //   __ movl(method, Address(esi, edx, Address::times_1, method_offset));
       __ dsll(AT, t2, Address::times_1);
       __ add(AT, AT, t1 );
       __ ld_ptr(method, AT,  method_offset);
 #ifdef ASSERT
 	if (DebugVtables) {
 		Label L1;
 	//      __ cmpl(method, NULL_WORD);
  //     __ jcc(Assembler::equal, L1);
         __ beq(method, R0, L1);
         __ delayed()->nop();
 //	__ cmpl(Address(method, Method::from_compiled_offset()), NULL_WORD);
         __ lw(AT, method,in_bytes(Method::from_compiled_offset()));
 //	__ jcc(Assembler::notZero, L1);
         __ bne(AT, R0, L1);
         __ delayed()->nop();
 	__ stop("methodOop is null");
 	__ bind(L1);
 	}
 #endif // ASSERT
 /*
 	// Rmethod: methodOop
 	// T0: receiver
 	// T9: entry point
 	__ jmp(T9);
 #endif // COMPILER2
 */
         address ame_addr = __ pc();
         __ ld_ptr(T9, method,in_bytes(Method::from_compiled_offset()));
         __ jr(T9);
         __ delayed()->nop();
     masm->flush();
 	s->set_exception_points(npe_addr, ame_addr);
 	return s;
 }
 // NOTE : whenever you change the code above, dont forget to change the const here
 int VtableStub::pd_code_size_limit(bool is_vtable_stub) {
 	if (is_vtable_stub) {
             return ( DebugVtables ? 600 : 28) + (CountCompiledCalls ? 24 : 0)+
 		(UseCompressedOops ? 16 : 0);
 	} else {
             return  ( DebugVtables ? 636 : 72) + (CountCompiledCalls ? 24 : 0)+
 		(UseCompressedOops ? 32 : 0);
 	}
 }
 int VtableStub::pd_code_alignment() {
   return wordSize;
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/mips/vm/vtableStubs_mips_64.cpp@2d8a650513c2 (annotated)

src/cpu/mips/vm/vtableStubs_mips_64.cpp