jdk8-mips64-public/hotspot: src/cpu/sparc/vm/vtableStubs

src/cpu/sparc/vm/vtableStubs_sparc.cpp@6c4cda924d2e (annotated)

src/cpu/sparc/vm/vtableStubs_sparc.cpp

Wed, 07 Jan 2009 11:23:28 -0800

author: kvn
date: Wed, 07 Jan 2009 11:23:28 -0800
changeset 986: 6c4cda924d2e
parent 631: d1605aabd0a1
child 1058: 9adddb8c0fc8
permissions: -rw-r--r--

6790182: matcher.cpp:1375: assert(false,"bad AD file")
Summary: Add a match rule for regD_low in regD definition.
Reviewed-by: never

 /*
  * Copyright 1997-2008 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 #include "incls/_precompiled.incl"
 #include "incls/_vtableStubs_sparc.cpp.incl"
 // 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, oopDesc* receiver, int index);
 #endif
 // Used by compiler only; may use only caller saved, non-argument registers
 // NOTE:  %%%% if any change is made to this stub make sure that the function
 //             pd_code_size_limit is changed to ensure the correct size for VtableStub
 VtableStub* VtableStubs::create_vtable_stub(int vtable_index) {
   const int sparc_code_length = VtableStub::pd_code_size_limit(true);
   VtableStub* s = new(sparc_code_length) VtableStub(true, vtable_index);
   ResourceMark rm;
   CodeBuffer cb(s->entry_point(), sparc_code_length);
   MacroAssembler* masm = new MacroAssembler(&cb);
 #ifndef PRODUCT
   if (CountCompiledCalls) {
     Address ctr(G5, SharedRuntime::nof_megamorphic_calls_addr());
     __ sethi(ctr);
     __ ld(ctr, G3_scratch);
     __ inc(G3_scratch);
     __ st(G3_scratch, ctr);
   }
 #endif /* PRODUCT */
   assert(VtableStub::receiver_location() == O0->as_VMReg(), "receiver expected in O0");
   // get receiver klass
   address npe_addr = __ pc();
   __ load_klass(O0, G3_scratch);
   // set methodOop (in case of interpreted method), and destination address
   int entry_offset = instanceKlass::vtable_start_offset() + vtable_index*vtableEntry::size();
 #ifndef PRODUCT
   if (DebugVtables) {
     Label L;
     // check offset vs vtable length
     __ ld(G3_scratch, instanceKlass::vtable_length_offset()*wordSize, G5);
     __ cmp(G5, vtable_index*vtableEntry::size());
     __ br(Assembler::greaterUnsigned, false, Assembler::pt, L);
     __ delayed()->nop();
     __ set(vtable_index, O2);
     __ call_VM(noreg, CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), O0, O2);
     __ bind(L);
   }
 #endif
   int v_off = entry_offset*wordSize + vtableEntry::method_offset_in_bytes();
   if( __ is_simm13(v_off) ) {
     __ ld_ptr(G3, v_off, G5_method);
   } else {
     __ set(v_off,G5);
     __ ld_ptr(G3, G5, G5_method);
   }
 #ifndef PRODUCT
   if (DebugVtables) {
     Label L;
     __ br_notnull(G5_method, false, Assembler::pt, L);
     __ delayed()->nop();
     __ stop("Vtable entry is ZERO");
     __ bind(L);
   }
 #endif
   address ame_addr = __ pc();  // if the vtable entry is null, the method is abstract
                                // NOTE: for vtable dispatches, the vtable entry will never be null.
   __ ld_ptr(G5_method, in_bytes(methodOopDesc::from_compiled_offset()), G3_scratch);
   // jump to target (either compiled code or c2iadapter)
   __ JMP(G3_scratch, 0);
   // load methodOop (in case we call c2iadapter)
   __ delayed()->nop();
   masm->flush();
   s->set_exception_points(npe_addr, ame_addr);
   return s;
 }
 // NOTE:  %%%% if any change is made to this stub make sure that the function
 //             pd_code_size_limit is changed to ensure the correct size for VtableStub
 VtableStub* VtableStubs::create_itable_stub(int vtable_index) {
   const int sparc_code_length = VtableStub::pd_code_size_limit(false);
   VtableStub* s = new(sparc_code_length) VtableStub(false, vtable_index);
   ResourceMark rm;
   CodeBuffer cb(s->entry_point(), sparc_code_length);
   MacroAssembler* masm = new MacroAssembler(&cb);
   Register G3_klassOop = G3_scratch;
   Register G5_interface = G5;  // Passed in as an argument
   Label search;
   // Entry arguments:
   //  G5_interface: Interface
   //  O0:           Receiver
   assert(VtableStub::receiver_location() == O0->as_VMReg(), "receiver expected in O0");
   // get receiver klass (also an implicit null-check)
   address npe_addr = __ pc();
   __ load_klass(O0, G3_klassOop);
   __ verify_oop(G3_klassOop);
   // Push a new window to get some temp registers.  This chops the head of all
   // my 64-bit %o registers in the LION build, but this is OK because no longs
   // are passed in the %o registers.  Instead, longs are passed in G1 and G4
   // and so those registers are not available here.
   __ save(SP,-frame::register_save_words*wordSize,SP);
   Register I0_receiver = I0;    // Location of receiver after save
 #ifndef PRODUCT
   if (CountCompiledCalls) {
     Address ctr(L0, SharedRuntime::nof_megamorphic_calls_addr());
     __ sethi(ctr);
     __ ld(ctr, L1);
     __ inc(L1);
     __ st(L1, ctr);
   }
 #endif /* PRODUCT */
   // load start of itable entries into L0 register
   const int base = instanceKlass::vtable_start_offset() * wordSize;
   __ ld(Address(G3_klassOop, 0, instanceKlass::vtable_length_offset() * wordSize), L0);
   // %%% Could store the aligned, prescaled offset in the klassoop.
   __ sll(L0, exact_log2(vtableEntry::size() * wordSize), L0);
   // see code for instanceKlass::start_of_itable!
   const int vtable_alignment = align_object_offset(1);
   assert(vtable_alignment == 1 || vtable_alignment == 2, "");
   const int odd_bit = vtableEntry::size() * wordSize;
   if (vtable_alignment == 2) {
     __ and3(L0, odd_bit, L1);   // isolate the odd bit
   }
   __ add(G3_klassOop, L0, L0);
   if (vtable_alignment == 2) {
     __ add(L0, L1, L0);         // double the odd bit, to align up
   }
   // Loop over all itable entries until desired interfaceOop (G5_interface) found
   __ bind(search);
   // %%%% Could load both offset and interface in one ldx, if they were
   // in the opposite order.  This would save a load.
   __ ld_ptr(L0, base + itableOffsetEntry::interface_offset_in_bytes(), L1);
   // If the entry is NULL then we've reached the end of the table
   // without finding the expected interface, so throw an exception
   Label throw_icce;
   __ bpr(Assembler::rc_z, false, Assembler::pn, L1, throw_icce);
   __ delayed()->cmp(G5_interface, L1);
   __ brx(Assembler::notEqual, true, Assembler::pn, search);
   __ delayed()->add(L0, itableOffsetEntry::size() * wordSize, L0);
   // entry found and L0 points to it, move offset of vtable for interface into L0
   __ ld(L0, base + itableOffsetEntry::offset_offset_in_bytes(), L0);
   // Compute itableMethodEntry and get methodOop(G5_method) and entrypoint(L0) for compiler
   const int method_offset = (itableMethodEntry::size() * wordSize * vtable_index) + itableMethodEntry::method_offset_in_bytes();
   __ add(G3_klassOop, L0, L1);
   __ ld_ptr(L1, method_offset, G5_method);
 #ifndef PRODUCT
   if (DebugVtables) {
     Label L01;
     __ ld_ptr(L1, method_offset, G5_method);
     __ bpr(Assembler::rc_nz, false, Assembler::pt, G5_method, L01);
     __ delayed()->nop();
     __ stop("methodOop is null");
     __ bind(L01);
     __ verify_oop(G5_method);
   }
 #endif
   // If the following load is through a NULL pointer, we'll take an OS
   // exception that should translate into an AbstractMethodError.  We need the
   // window count to be correct at that time.
   __ restore();                 // Restore registers BEFORE the AME point
   address ame_addr = __ pc();   // if the vtable entry is null, the method is abstract
   __ ld_ptr(G5_method, in_bytes(methodOopDesc::from_compiled_offset()), G3_scratch);
   // G5_method:  methodOop
   // O0:         Receiver
   // G3_scratch: entry point
   __ JMP(G3_scratch, 0);
   __ delayed()->nop();
   __ bind(throw_icce);
   Address icce(G3_scratch, StubRoutines::throw_IncompatibleClassChangeError_entry());
   __ jump_to(icce, 0);
   __ delayed()->restore();
   masm->flush();
   guarantee(__ pc() <= s->code_end(), "overflowed buffer");
   s->set_exception_points(npe_addr, ame_addr);
   return s;
 }
 int VtableStub::pd_code_size_limit(bool is_vtable_stub) {
   if (TraceJumps || DebugVtables || CountCompiledCalls || VerifyOops) return 1000;
   else {
     const int slop = 2*BytesPerInstWord; // sethi;add  (needed for long offsets)
     if (is_vtable_stub) {
       // ld;ld;ld,jmp,nop
       const int basic = 5*BytesPerInstWord +
                         // shift;add for load_klass
                         (UseCompressedOops ? 2*BytesPerInstWord : 0);
       return basic + slop;
     } else {
       // save, ld, ld, sll, and, add, add, ld, cmp, br, add, ld, add, ld, ld, jmp, restore, sethi, jmpl, restore
       const int basic = (20 LP64_ONLY(+ 6)) * BytesPerInstWord +
                         // shift;add for load_klass
                         (UseCompressedOops ? 2*BytesPerInstWord : 0);
       return (basic + slop);
     }
   }
 }
 int VtableStub::pd_code_alignment() {
   // UltraSPARC cache line size is 8 instructions:
   const unsigned int icache_line_size = 32;
   return icache_line_size;
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/sparc/vm/vtableStubs_sparc.cpp@6c4cda924d2e (annotated)

src/cpu/sparc/vm/vtableStubs_sparc.cpp