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

src/cpu/sparc/vm/interp_masm_sparc.cpp@2fe087c3e814 (annotated)

src/cpu/sparc/vm/interp_masm_sparc.cpp

Wed, 06 Jun 2012 14:33:43 -0400

author: jiangli
date: Wed, 06 Jun 2012 14:33:43 -0400
changeset 3826: 2fe087c3e814
parent 3050: fdb992d83a87
child 3969: 1d7922586cf6
permissions: -rw-r--r--

7172967: Eliminate constMethod's _method backpointer to methodOop.
Summary: Eliminate constMethod's _method backpointer to methodOop, and move the _constant field from methodOop to constMethod.
Reviewed-by: roland, bdelsart, kamg

 /*
  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. 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 "interp_masm_sparc.hpp"
 #include "interpreter/interpreter.hpp"
 #include "interpreter/interpreterRuntime.hpp"
 #include "oops/arrayOop.hpp"
 #include "oops/markOop.hpp"
 #include "oops/methodDataOop.hpp"
 #include "oops/methodOop.hpp"
 #include "prims/jvmtiExport.hpp"
 #include "prims/jvmtiRedefineClassesTrace.hpp"
 #include "prims/jvmtiThreadState.hpp"
 #include "runtime/basicLock.hpp"
 #include "runtime/biasedLocking.hpp"
 #include "runtime/sharedRuntime.hpp"
 #ifdef TARGET_OS_FAMILY_linux
 # include "thread_linux.inline.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_solaris
 # include "thread_solaris.inline.hpp"
 #endif
 #ifndef CC_INTERP
 #ifndef FAST_DISPATCH
 #define FAST_DISPATCH 1
 #endif
 #undef FAST_DISPATCH
 // Implementation of InterpreterMacroAssembler
 // This file specializes the assember with interpreter-specific macros
 const Address InterpreterMacroAssembler::l_tmp(FP, (frame::interpreter_frame_l_scratch_fp_offset * wordSize) + STACK_BIAS);
 const Address InterpreterMacroAssembler::d_tmp(FP, (frame::interpreter_frame_d_scratch_fp_offset * wordSize) + STACK_BIAS);
 #else // CC_INTERP
 #ifndef STATE
 #define STATE(field_name) Lstate, in_bytes(byte_offset_of(BytecodeInterpreter, field_name))
 #endif // STATE
 #endif // CC_INTERP
 void InterpreterMacroAssembler::compute_extra_locals_size_in_bytes(Register args_size, Register locals_size, Register delta) {
   // Note: this algorithm is also used by C1's OSR entry sequence.
   // Any changes should also be applied to CodeEmitter::emit_osr_entry().
   assert_different_registers(args_size, locals_size);
   // max_locals*2 for TAGS.  Assumes that args_size has already been adjusted.
   subcc(locals_size, args_size, delta);// extra space for non-arguments locals in words
   // Use br/mov combination because it works on both V8 and V9 and is
   // faster.
   Label skip_move;
   br(Assembler::negative, true, Assembler::pt, skip_move);
   delayed()->mov(G0, delta);
   bind(skip_move);
   round_to(delta, WordsPerLong);       // make multiple of 2 (SP must be 2-word aligned)
   sll(delta, LogBytesPerWord, delta);  // extra space for locals in bytes
 }
 #ifndef CC_INTERP
 // Dispatch code executed in the prolog of a bytecode which does not do it's
 // own dispatch. The dispatch address is computed and placed in IdispatchAddress
 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int bcp_incr) {
   assert_not_delayed();
 #ifdef FAST_DISPATCH
   // FAST_DISPATCH and ProfileInterpreter are mutually exclusive since
   // they both use I2.
   assert(!ProfileInterpreter, "FAST_DISPATCH and +ProfileInterpreter are mutually exclusive");
   ldub(Lbcp, bcp_incr, Lbyte_code);                     // load next bytecode
   add(Lbyte_code, Interpreter::distance_from_dispatch_table(state), Lbyte_code);
                                                         // add offset to correct dispatch table
   sll(Lbyte_code, LogBytesPerWord, Lbyte_code);         // multiply by wordSize
   ld_ptr(IdispatchTables, Lbyte_code, IdispatchAddress);// get entry addr
 #else
   ldub( Lbcp, bcp_incr, Lbyte_code);                    // load next bytecode
   // dispatch table to use
   AddressLiteral tbl(Interpreter::dispatch_table(state));
   sll(Lbyte_code, LogBytesPerWord, Lbyte_code);         // multiply by wordSize
   set(tbl, G3_scratch);                                 // compute addr of table
   ld_ptr(G3_scratch, Lbyte_code, IdispatchAddress);     // get entry addr
 #endif
 }
 // Dispatch code executed in the epilog of a bytecode which does not do it's
 // own dispatch. The dispatch address in IdispatchAddress is used for the
 // dispatch.
 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int bcp_incr) {
   assert_not_delayed();
   verify_FPU(1, state);
   interp_verify_oop(Otos_i, state, __FILE__, __LINE__);
   jmp( IdispatchAddress, 0 );
   if (bcp_incr != 0)  delayed()->inc(Lbcp, bcp_incr);
   else                delayed()->nop();
 }
 void InterpreterMacroAssembler::dispatch_next(TosState state, int bcp_incr) {
   // %%%% consider branching to a single shared dispatch stub (for each bcp_incr)
   assert_not_delayed();
   ldub( Lbcp, bcp_incr, Lbyte_code);               // load next bytecode
   dispatch_Lbyte_code(state, Interpreter::dispatch_table(state), bcp_incr);
 }
 void InterpreterMacroAssembler::dispatch_next_noverify_oop(TosState state, int bcp_incr) {
   // %%%% consider branching to a single shared dispatch stub (for each bcp_incr)
   assert_not_delayed();
   ldub( Lbcp, bcp_incr, Lbyte_code);               // load next bytecode
   dispatch_Lbyte_code(state, Interpreter::dispatch_table(state), bcp_incr, false);
 }
 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
   // load current bytecode
   assert_not_delayed();
   ldub( Lbcp, 0, Lbyte_code);               // load next bytecode
   dispatch_base(state, table);
 }
 void InterpreterMacroAssembler::call_VM_leaf_base(
   Register java_thread,
   address  entry_point,
   int      number_of_arguments
 ) {
   if (!java_thread->is_valid())
     java_thread = L7_thread_cache;
   // super call
   MacroAssembler::call_VM_leaf_base(java_thread, entry_point, number_of_arguments);
 }
 void InterpreterMacroAssembler::call_VM_base(
   Register        oop_result,
   Register        java_thread,
   Register        last_java_sp,
   address         entry_point,
   int             number_of_arguments,
   bool            check_exception
 ) {
   if (!java_thread->is_valid())
     java_thread = L7_thread_cache;
   // See class ThreadInVMfromInterpreter, which assumes that the interpreter
   // takes responsibility for setting its own thread-state on call-out.
   // However, ThreadInVMfromInterpreter resets the state to "in_Java".
   //save_bcp();                                  // save bcp
   MacroAssembler::call_VM_base(oop_result, java_thread, last_java_sp, entry_point, number_of_arguments, check_exception);
   //restore_bcp();                               // restore bcp
   //restore_locals();                            // restore locals pointer
 }
 void InterpreterMacroAssembler::check_and_handle_popframe(Register scratch_reg) {
   if (JvmtiExport::can_pop_frame()) {
     Label L;
     // Check the "pending popframe condition" flag in the current thread
     ld(G2_thread, JavaThread::popframe_condition_offset(), scratch_reg);
     // Initiate popframe handling only if it is not already being processed.  If the flag
     // has the popframe_processing bit set, it means that this code is called *during* popframe
     // handling - we don't want to reenter.
     btst(JavaThread::popframe_pending_bit, scratch_reg);
     br(zero, false, pt, L);
     delayed()->nop();
     btst(JavaThread::popframe_processing_bit, scratch_reg);
     br(notZero, false, pt, L);
     delayed()->nop();
     // Call Interpreter::remove_activation_preserving_args_entry() to get the
     // address of the same-named entrypoint in the generated interpreter code.
     call_VM_leaf(noreg, CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
     // Jump to Interpreter::_remove_activation_preserving_args_entry
     jmpl(O0, G0, G0);
     delayed()->nop();
     bind(L);
   }
 }
 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
   Register thr_state = G4_scratch;
   ld_ptr(G2_thread, JavaThread::jvmti_thread_state_offset(), thr_state);
   const Address tos_addr(thr_state, JvmtiThreadState::earlyret_tos_offset());
   const Address oop_addr(thr_state, JvmtiThreadState::earlyret_oop_offset());
   const Address val_addr(thr_state, JvmtiThreadState::earlyret_value_offset());
   switch (state) {
   case ltos: ld_long(val_addr, Otos_l);                   break;
   case atos: ld_ptr(oop_addr, Otos_l);
              st_ptr(G0, oop_addr);                        break;
   case btos:                                           // fall through
   case ctos:                                           // fall through
   case stos:                                           // fall through
   case itos: ld(val_addr, Otos_l1);                       break;
   case ftos: ldf(FloatRegisterImpl::S, val_addr, Ftos_f); break;
   case dtos: ldf(FloatRegisterImpl::D, val_addr, Ftos_d); break;
   case vtos: /* nothing to do */                          break;
   default  : ShouldNotReachHere();
   }
   // Clean up tos value in the jvmti thread state
   or3(G0, ilgl, G3_scratch);
   stw(G3_scratch, tos_addr);
   st_long(G0, val_addr);
   interp_verify_oop(Otos_i, state, __FILE__, __LINE__);
 }
 void InterpreterMacroAssembler::check_and_handle_earlyret(Register scratch_reg) {
   if (JvmtiExport::can_force_early_return()) {
     Label L;
     Register thr_state = G3_scratch;
     ld_ptr(G2_thread, JavaThread::jvmti_thread_state_offset(), thr_state);
     br_null_short(thr_state, pt, L); // if (thread->jvmti_thread_state() == NULL) exit;
     // Initiate earlyret handling only if it is not already being processed.
     // If the flag has the earlyret_processing bit set, it means that this code
     // is called *during* earlyret handling - we don't want to reenter.
     ld(thr_state, JvmtiThreadState::earlyret_state_offset(), G4_scratch);
     cmp_and_br_short(G4_scratch, JvmtiThreadState::earlyret_pending, Assembler::notEqual, pt, L);
     // Call Interpreter::remove_activation_early_entry() to get the address of the
     // same-named entrypoint in the generated interpreter code
     ld(thr_state, JvmtiThreadState::earlyret_tos_offset(), Otos_l1);
     call_VM_leaf(noreg, CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), Otos_l1);
     // Jump to Interpreter::_remove_activation_early_entry
     jmpl(O0, G0, G0);
     delayed()->nop();
     bind(L);
   }
 }
 void InterpreterMacroAssembler::super_call_VM_leaf(Register thread_cache, address entry_point, Register arg_1, Register arg_2) {
   mov(arg_1, O0);
   mov(arg_2, O1);
   MacroAssembler::call_VM_leaf_base(thread_cache, entry_point, 2);
 }
 #endif /* CC_INTERP */
 #ifndef CC_INTERP
 void InterpreterMacroAssembler::dispatch_base(TosState state, address* table) {
   assert_not_delayed();
   dispatch_Lbyte_code(state, table);
 }
 void InterpreterMacroAssembler::dispatch_normal(TosState state) {
   dispatch_base(state, Interpreter::normal_table(state));
 }
 void InterpreterMacroAssembler::dispatch_only(TosState state) {
   dispatch_base(state, Interpreter::dispatch_table(state));
 }
 // common code to dispatch and dispatch_only
 // dispatch value in Lbyte_code and increment Lbcp
 void InterpreterMacroAssembler::dispatch_Lbyte_code(TosState state, address* table, int bcp_incr, bool verify) {
   verify_FPU(1, state);
   // %%%%% maybe implement +VerifyActivationFrameSize here
   //verify_thread(); //too slow; we will just verify on method entry & exit
   if (verify) interp_verify_oop(Otos_i, state, __FILE__, __LINE__);
 #ifdef FAST_DISPATCH
   if (table == Interpreter::dispatch_table(state)) {
     // use IdispatchTables
     add(Lbyte_code, Interpreter::distance_from_dispatch_table(state), Lbyte_code);
                                                         // add offset to correct dispatch table
     sll(Lbyte_code, LogBytesPerWord, Lbyte_code);       // multiply by wordSize
     ld_ptr(IdispatchTables, Lbyte_code, G3_scratch);    // get entry addr
   } else {
 #endif
     // dispatch table to use
     AddressLiteral tbl(table);
     sll(Lbyte_code, LogBytesPerWord, Lbyte_code);       // multiply by wordSize
     set(tbl, G3_scratch);                               // compute addr of table
     ld_ptr(G3_scratch, Lbyte_code, G3_scratch);         // get entry addr
 #ifdef FAST_DISPATCH
   }
 #endif
   jmp( G3_scratch, 0 );
   if (bcp_incr != 0)  delayed()->inc(Lbcp, bcp_incr);
   else                delayed()->nop();
 }
 // Helpers for expression stack
 // Longs and doubles are Category 2 computational types in the
 // JVM specification (section 3.11.1) and take 2 expression stack or
 // local slots.
 // Aligning them on 32 bit with tagged stacks is hard because the code generated
 // for the dup* bytecodes depends on what types are already on the stack.
 // If the types are split into the two stack/local slots, that is much easier
 // (and we can use 0 for non-reference tags).
 // Known good alignment in _LP64 but unknown otherwise
 void InterpreterMacroAssembler::load_unaligned_double(Register r1, int offset, FloatRegister d) {
   assert_not_delayed();
 #ifdef _LP64
   ldf(FloatRegisterImpl::D, r1, offset, d);
 #else
   ldf(FloatRegisterImpl::S, r1, offset, d);
   ldf(FloatRegisterImpl::S, r1, offset + Interpreter::stackElementSize, d->successor());
 #endif
 }
 // Known good alignment in _LP64 but unknown otherwise
 void InterpreterMacroAssembler::store_unaligned_double(FloatRegister d, Register r1, int offset) {
   assert_not_delayed();
 #ifdef _LP64
   stf(FloatRegisterImpl::D, d, r1, offset);
   // store something more useful here
   debug_only(stx(G0, r1, offset+Interpreter::stackElementSize);)
 #else
   stf(FloatRegisterImpl::S, d, r1, offset);
   stf(FloatRegisterImpl::S, d->successor(), r1, offset + Interpreter::stackElementSize);
 #endif
 }
 // Known good alignment in _LP64 but unknown otherwise
 void InterpreterMacroAssembler::load_unaligned_long(Register r1, int offset, Register rd) {
   assert_not_delayed();
 #ifdef _LP64
   ldx(r1, offset, rd);
 #else
   ld(r1, offset, rd);
   ld(r1, offset + Interpreter::stackElementSize, rd->successor());
 #endif
 }
 // Known good alignment in _LP64 but unknown otherwise
 void InterpreterMacroAssembler::store_unaligned_long(Register l, Register r1, int offset) {
   assert_not_delayed();
 #ifdef _LP64
   stx(l, r1, offset);
   // store something more useful here
   debug_only(stx(G0, r1, offset+Interpreter::stackElementSize);)
 #else
   st(l, r1, offset);
   st(l->successor(), r1, offset + Interpreter::stackElementSize);
 #endif
 }
 void InterpreterMacroAssembler::pop_i(Register r) {
   assert_not_delayed();
   ld(Lesp, Interpreter::expr_offset_in_bytes(0), r);
   inc(Lesp, Interpreter::stackElementSize);
   debug_only(verify_esp(Lesp));
 }
 void InterpreterMacroAssembler::pop_ptr(Register r, Register scratch) {
   assert_not_delayed();
   ld_ptr(Lesp, Interpreter::expr_offset_in_bytes(0), r);
   inc(Lesp, Interpreter::stackElementSize);
   debug_only(verify_esp(Lesp));
 }
 void InterpreterMacroAssembler::pop_l(Register r) {
   assert_not_delayed();
   load_unaligned_long(Lesp, Interpreter::expr_offset_in_bytes(0), r);
   inc(Lesp, 2*Interpreter::stackElementSize);
   debug_only(verify_esp(Lesp));
 }
 void InterpreterMacroAssembler::pop_f(FloatRegister f, Register scratch) {
   assert_not_delayed();
   ldf(FloatRegisterImpl::S, Lesp, Interpreter::expr_offset_in_bytes(0), f);
   inc(Lesp, Interpreter::stackElementSize);
   debug_only(verify_esp(Lesp));
 }
 void InterpreterMacroAssembler::pop_d(FloatRegister f, Register scratch) {
   assert_not_delayed();
   load_unaligned_double(Lesp, Interpreter::expr_offset_in_bytes(0), f);
   inc(Lesp, 2*Interpreter::stackElementSize);
   debug_only(verify_esp(Lesp));
 }
 void InterpreterMacroAssembler::push_i(Register r) {
   assert_not_delayed();
   debug_only(verify_esp(Lesp));
   st(r, Lesp, 0);
   dec(Lesp, Interpreter::stackElementSize);
 }
 void InterpreterMacroAssembler::push_ptr(Register r) {
   assert_not_delayed();
   st_ptr(r, Lesp, 0);
   dec(Lesp, Interpreter::stackElementSize);
 }
 // remember: our convention for longs in SPARC is:
 // O0 (Otos_l1) has high-order part in first word,
 // O1 (Otos_l2) has low-order part in second word
 void InterpreterMacroAssembler::push_l(Register r) {
   assert_not_delayed();
   debug_only(verify_esp(Lesp));
   // Longs are stored in memory-correct order, even if unaligned.
   int offset = -Interpreter::stackElementSize;
   store_unaligned_long(r, Lesp, offset);
   dec(Lesp, 2 * Interpreter::stackElementSize);
 }
 void InterpreterMacroAssembler::push_f(FloatRegister f) {
   assert_not_delayed();
   debug_only(verify_esp(Lesp));
   stf(FloatRegisterImpl::S, f, Lesp, 0);
   dec(Lesp, Interpreter::stackElementSize);
 }
 void InterpreterMacroAssembler::push_d(FloatRegister d)   {
   assert_not_delayed();
   debug_only(verify_esp(Lesp));
   // Longs are stored in memory-correct order, even if unaligned.
   int offset = -Interpreter::stackElementSize;
   store_unaligned_double(d, Lesp, offset);
   dec(Lesp, 2 * Interpreter::stackElementSize);
 }
 void InterpreterMacroAssembler::push(TosState state) {
   interp_verify_oop(Otos_i, state, __FILE__, __LINE__);
   switch (state) {
     case atos: push_ptr();            break;
     case btos: push_i();              break;
     case ctos:
     case stos: push_i();              break;
     case itos: push_i();              break;
     case ltos: push_l();              break;
     case ftos: push_f();              break;
     case dtos: push_d();              break;
     case vtos: /* nothing to do */    break;
     default  : ShouldNotReachHere();
   }
 }
 void InterpreterMacroAssembler::pop(TosState state) {
   switch (state) {
     case atos: pop_ptr();            break;
     case btos: pop_i();              break;
     case ctos:
     case stos: pop_i();              break;
     case itos: pop_i();              break;
     case ltos: pop_l();              break;
     case ftos: pop_f();              break;
     case dtos: pop_d();              break;
     case vtos: /* nothing to do */   break;
     default  : ShouldNotReachHere();
   }
   interp_verify_oop(Otos_i, state, __FILE__, __LINE__);
 }
 // Helpers for swap and dup
 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
   ld_ptr(Lesp, Interpreter::expr_offset_in_bytes(n), val);
 }
 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
   st_ptr(val, Lesp, Interpreter::expr_offset_in_bytes(n));
 }
 void InterpreterMacroAssembler::load_receiver(Register param_count,
                                               Register recv) {
   sll(param_count, Interpreter::logStackElementSize, param_count);
   ld_ptr(Lesp, param_count, recv);                      // gets receiver Oop
 }
 void InterpreterMacroAssembler::empty_expression_stack() {
   // Reset Lesp.
   sub( Lmonitors, wordSize, Lesp );
   // Reset SP by subtracting more space from Lesp.
   Label done;
   verify_oop(Lmethod);
   assert(G4_scratch != Gframe_size, "Only you can prevent register aliasing!");
   // A native does not need to do this, since its callee does not change SP.
   ld(Lmethod, methodOopDesc::access_flags_offset(), Gframe_size);  // Load access flags.
   btst(JVM_ACC_NATIVE, Gframe_size);
   br(Assembler::notZero, false, Assembler::pt, done);
   delayed()->nop();
   // Compute max expression stack+register save area
   lduh(Lmethod, in_bytes(methodOopDesc::max_stack_offset()), Gframe_size);  // Load max stack.
   add( Gframe_size, frame::memory_parameter_word_sp_offset, Gframe_size );
   //
   // now set up a stack frame with the size computed above
   //
   //round_to( Gframe_size, WordsPerLong ); // -- moved down to the "and" below
   sll( Gframe_size, LogBytesPerWord, Gframe_size );
   sub( Lesp, Gframe_size, Gframe_size );
   and3( Gframe_size, -(2 * wordSize), Gframe_size );          // align SP (downwards) to an 8/16-byte boundary
   debug_only(verify_sp(Gframe_size, G4_scratch));
 #ifdef _LP64
   sub(Gframe_size, STACK_BIAS, Gframe_size );
 #endif
   mov(Gframe_size, SP);
   bind(done);
 }
 #ifdef ASSERT
 void InterpreterMacroAssembler::verify_sp(Register Rsp, Register Rtemp) {
   Label Bad, OK;
   // Saved SP must be aligned.
 #ifdef _LP64
   btst(2*BytesPerWord-1, Rsp);
 #else
   btst(LongAlignmentMask, Rsp);
 #endif
   br(Assembler::notZero, false, Assembler::pn, Bad);
   delayed()->nop();
   // Saved SP, plus register window size, must not be above FP.
   add(Rsp, frame::register_save_words * wordSize, Rtemp);
 #ifdef _LP64
   sub(Rtemp, STACK_BIAS, Rtemp);  // Bias Rtemp before cmp to FP
 #endif
   cmp_and_brx_short(Rtemp, FP, Assembler::greaterUnsigned, Assembler::pn, Bad);
   // Saved SP must not be ridiculously below current SP.
   size_t maxstack = MAX2(JavaThread::stack_size_at_create(), (size_t) 4*K*K);
   set(maxstack, Rtemp);
   sub(SP, Rtemp, Rtemp);
 #ifdef _LP64
   add(Rtemp, STACK_BIAS, Rtemp);  // Unbias Rtemp before cmp to Rsp
 #endif
   cmp_and_brx_short(Rsp, Rtemp, Assembler::lessUnsigned, Assembler::pn, Bad);
   ba_short(OK);
   bind(Bad);
   stop("on return to interpreted call, restored SP is corrupted");
   bind(OK);
 }
 void InterpreterMacroAssembler::verify_esp(Register Resp) {
   // about to read or write Resp[0]
   // make sure it is not in the monitors or the register save area
   Label OK1, OK2;
   cmp(Resp, Lmonitors);
   brx(Assembler::lessUnsigned, true, Assembler::pt, OK1);
   delayed()->sub(Resp, frame::memory_parameter_word_sp_offset * wordSize, Resp);
   stop("too many pops:  Lesp points into monitor area");
   bind(OK1);
 #ifdef _LP64
   sub(Resp, STACK_BIAS, Resp);
 #endif
   cmp(Resp, SP);
   brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, OK2);
   delayed()->add(Resp, STACK_BIAS + frame::memory_parameter_word_sp_offset * wordSize, Resp);
   stop("too many pushes:  Lesp points into register window");
   bind(OK2);
 }
 #endif // ASSERT
 // Load compiled (i2c) or interpreter entry when calling from interpreted and
 // do the call. Centralized so that all interpreter calls will do the same actions.
 // If jvmti single stepping is on for a thread we must not call compiled code.
 void InterpreterMacroAssembler::call_from_interpreter(Register target, Register scratch, Register Rret) {
   // Assume we want to go compiled if available
   ld_ptr(G5_method, in_bytes(methodOopDesc::from_interpreted_offset()), target);
   if (JvmtiExport::can_post_interpreter_events()) {
     // JVMTI events, such as single-stepping, are implemented partly by avoiding running
     // compiled code in threads for which the event is enabled.  Check here for
     // interp_only_mode if these events CAN be enabled.
     verify_thread();
     Label skip_compiled_code;
     const Address interp_only(G2_thread, JavaThread::interp_only_mode_offset());
     ld(interp_only, scratch);
     cmp_zero_and_br(Assembler::notZero, scratch, skip_compiled_code, true, Assembler::pn);
     delayed()->ld_ptr(G5_method, in_bytes(methodOopDesc::interpreter_entry_offset()), target);
     bind(skip_compiled_code);
   }
   // the i2c_adapters need methodOop in G5_method (right? %%%)
   // do the call
 #ifdef ASSERT
   {
     Label ok;
     br_notnull_short(target, Assembler::pt, ok);
     stop("null entry point");
     bind(ok);
   }
 #endif // ASSERT
   // Adjust Rret first so Llast_SP can be same as Rret
   add(Rret, -frame::pc_return_offset, O7);
   add(Lesp, BytesPerWord, Gargs); // setup parameter pointer
   // Record SP so we can remove any stack space allocated by adapter transition
   jmp(target, 0);
   delayed()->mov(SP, Llast_SP);
 }
 void InterpreterMacroAssembler::if_cmp(Condition cc, bool ptr_compare) {
   assert_not_delayed();
   Label not_taken;
   if (ptr_compare) brx(cc, false, Assembler::pn, not_taken);
   else             br (cc, false, Assembler::pn, not_taken);
   delayed()->nop();
   TemplateTable::branch(false,false);
   bind(not_taken);
   profile_not_taken_branch(G3_scratch);
 }
 void InterpreterMacroAssembler::get_2_byte_integer_at_bcp(
                                   int         bcp_offset,
                                   Register    Rtmp,
                                   Register    Rdst,
                                   signedOrNot is_signed,
                                   setCCOrNot  should_set_CC ) {
   assert(Rtmp != Rdst, "need separate temp register");
   assert_not_delayed();
   switch (is_signed) {
    default: ShouldNotReachHere();
    case   Signed:  ldsb( Lbcp, bcp_offset, Rdst  );  break; // high byte
    case Unsigned:  ldub( Lbcp, bcp_offset, Rdst  );  break; // high byte
   }
   ldub( Lbcp, bcp_offset + 1, Rtmp ); // low byte
   sll( Rdst, BitsPerByte, Rdst);
   switch (should_set_CC ) {
    default: ShouldNotReachHere();
    case      set_CC:  orcc( Rdst, Rtmp, Rdst ); break;
    case dont_set_CC:  or3(  Rdst, Rtmp, Rdst ); break;
   }
 }
 void InterpreterMacroAssembler::get_4_byte_integer_at_bcp(
                                   int        bcp_offset,
                                   Register   Rtmp,
                                   Register   Rdst,
                                   setCCOrNot should_set_CC ) {
   assert(Rtmp != Rdst, "need separate temp register");
   assert_not_delayed();
   add( Lbcp, bcp_offset, Rtmp);
   andcc( Rtmp, 3, G0);
   Label aligned;
   switch (should_set_CC ) {
    default: ShouldNotReachHere();
    case      set_CC: break;
    case dont_set_CC: break;
   }
   br(Assembler::zero, true, Assembler::pn, aligned);
 #ifdef _LP64
   delayed()->ldsw(Rtmp, 0, Rdst);
 #else
   delayed()->ld(Rtmp, 0, Rdst);
 #endif
   ldub(Lbcp, bcp_offset + 3, Rdst);
   ldub(Lbcp, bcp_offset + 2, Rtmp);  sll(Rtmp,  8, Rtmp);  or3(Rtmp, Rdst, Rdst);
   ldub(Lbcp, bcp_offset + 1, Rtmp);  sll(Rtmp, 16, Rtmp);  or3(Rtmp, Rdst, Rdst);
 #ifdef _LP64
   ldsb(Lbcp, bcp_offset + 0, Rtmp);  sll(Rtmp, 24, Rtmp);
 #else
   // Unsigned load is faster than signed on some implementations
   ldub(Lbcp, bcp_offset + 0, Rtmp);  sll(Rtmp, 24, Rtmp);
 #endif
   or3(Rtmp, Rdst, Rdst );
   bind(aligned);
   if (should_set_CC == set_CC) tst(Rdst);
 }
 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register cache, Register tmp,
                                                        int bcp_offset, size_t index_size) {
   assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
   if (index_size == sizeof(u2)) {
     get_2_byte_integer_at_bcp(bcp_offset, cache, tmp, Unsigned);
   } else if (index_size == sizeof(u4)) {
     assert(EnableInvokeDynamic, "giant index used only for JSR 292");
     get_4_byte_integer_at_bcp(bcp_offset, cache, tmp);
     assert(constantPoolCacheOopDesc::decode_secondary_index(~123) == 123, "else change next line");
     xor3(tmp, -1, tmp);  // convert to plain index
   } else if (index_size == sizeof(u1)) {
     assert(EnableInvokeDynamic, "tiny index used only for JSR 292");
     ldub(Lbcp, bcp_offset, tmp);
   } else {
     ShouldNotReachHere();
   }
 }
 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, Register tmp,
                                                            int bcp_offset, size_t index_size) {
   assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
   assert_different_registers(cache, tmp);
   assert_not_delayed();
   get_cache_index_at_bcp(cache, tmp, bcp_offset, index_size);
   // convert from field index to ConstantPoolCacheEntry index and from
   // word index to byte offset
   sll(tmp, exact_log2(in_words(ConstantPoolCacheEntry::size()) * BytesPerWord), tmp);
   add(LcpoolCache, tmp, cache);
 }
 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache,
                                                                         Register temp,
                                                                         Register bytecode,
                                                                         int byte_no,
                                                                         int bcp_offset,
                                                                         size_t index_size) {
   get_cache_and_index_at_bcp(cache, temp, bcp_offset, index_size);
   ld_ptr(cache, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::indices_offset(), bytecode);
   const int shift_count = (1 + byte_no) * BitsPerByte;
   srl( bytecode, shift_count, bytecode);
   and3(bytecode,        0xFF, bytecode);
 }
 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, Register tmp,
                                                                int bcp_offset, size_t index_size) {
   assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
   assert_different_registers(cache, tmp);
   assert_not_delayed();
   if (index_size == sizeof(u2)) {
     get_2_byte_integer_at_bcp(bcp_offset, cache, tmp, Unsigned);
   } else {
     ShouldNotReachHere();  // other sizes not supported here
   }
               // convert from field index to ConstantPoolCacheEntry index
               // and from word index to byte offset
   sll(tmp, exact_log2(in_words(ConstantPoolCacheEntry::size()) * BytesPerWord), tmp);
               // skip past the header
   add(tmp, in_bytes(constantPoolCacheOopDesc::base_offset()), tmp);
               // construct pointer to cache entry
   add(LcpoolCache, tmp, cache);
 }
 // Generate a subtype check: branch to ok_is_subtype if sub_klass is
 // a subtype of super_klass.  Blows registers Rsuper_klass, Rsub_klass, tmp1, tmp2.
 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
                                                   Register Rsuper_klass,
                                                   Register Rtmp1,
                                                   Register Rtmp2,
                                                   Register Rtmp3,
                                                   Label &ok_is_subtype ) {
   Label not_subtype;
   // Profile the not-null value's klass.
   profile_typecheck(Rsub_klass, Rtmp1);
   check_klass_subtype_fast_path(Rsub_klass, Rsuper_klass,
                                 Rtmp1, Rtmp2,
                                 &ok_is_subtype, &not_subtype, NULL);
   check_klass_subtype_slow_path(Rsub_klass, Rsuper_klass,
                                 Rtmp1, Rtmp2, Rtmp3, /*hack:*/ noreg,
                                 &ok_is_subtype, NULL);
   bind(not_subtype);
   profile_typecheck_failed(Rtmp1);
 }
 // Separate these two to allow for delay slot in middle
 // These are used to do a test and full jump to exception-throwing code.
 // %%%%% Could possibly reoptimize this by testing to see if could use
 // a single conditional branch (i.e. if span is small enough.
 // If you go that route, than get rid of the split and give up
 // on the delay-slot hack.
 void InterpreterMacroAssembler::throw_if_not_1_icc( Condition ok_condition,
                                                     Label&    ok ) {
   assert_not_delayed();
   br(ok_condition, true, pt, ok);
   // DELAY SLOT
 }
 void InterpreterMacroAssembler::throw_if_not_1_xcc( Condition ok_condition,
                                                     Label&    ok ) {
   assert_not_delayed();
   bp( ok_condition, true, Assembler::xcc, pt, ok);
   // DELAY SLOT
 }
 void InterpreterMacroAssembler::throw_if_not_1_x( Condition ok_condition,
                                                   Label&    ok ) {
   assert_not_delayed();
   brx(ok_condition, true, pt, ok);
   // DELAY SLOT
 }
 void InterpreterMacroAssembler::throw_if_not_2( address  throw_entry_point,
                                                 Register Rscratch,
                                                 Label&   ok ) {
   assert(throw_entry_point != NULL, "entry point must be generated by now");
   AddressLiteral dest(throw_entry_point);
   jump_to(dest, Rscratch);
   delayed()->nop();
   bind(ok);
 }
 // And if you cannot use the delay slot, here is a shorthand:
 void InterpreterMacroAssembler::throw_if_not_icc( Condition ok_condition,
                                                   address   throw_entry_point,
                                                   Register  Rscratch ) {
   Label ok;
   if (ok_condition != never) {
     throw_if_not_1_icc( ok_condition, ok);
     delayed()->nop();
   }
   throw_if_not_2( throw_entry_point, Rscratch, ok);
 }
 void InterpreterMacroAssembler::throw_if_not_xcc( Condition ok_condition,
                                                   address   throw_entry_point,
                                                   Register  Rscratch ) {
   Label ok;
   if (ok_condition != never) {
     throw_if_not_1_xcc( ok_condition, ok);
     delayed()->nop();
   }
   throw_if_not_2( throw_entry_point, Rscratch, ok);
 }
 void InterpreterMacroAssembler::throw_if_not_x( Condition ok_condition,
                                                 address   throw_entry_point,
                                                 Register  Rscratch ) {
   Label ok;
   if (ok_condition != never) {
     throw_if_not_1_x( ok_condition, ok);
     delayed()->nop();
   }
   throw_if_not_2( throw_entry_point, Rscratch, ok);
 }
 // Check that index is in range for array, then shift index by index_shift, and put arrayOop + shifted_index into res
 // Note: res is still shy of address by array offset into object.
 void InterpreterMacroAssembler::index_check_without_pop(Register array, Register index, int index_shift, Register tmp, Register res) {
   assert_not_delayed();
   verify_oop(array);
 #ifdef _LP64
   // sign extend since tos (index) can be a 32bit value
   sra(index, G0, index);
 #endif // _LP64
   // check array
   Label ptr_ok;
   tst(array);
   throw_if_not_1_x( notZero, ptr_ok );
   delayed()->ld( array, arrayOopDesc::length_offset_in_bytes(), tmp ); // check index
   throw_if_not_2( Interpreter::_throw_NullPointerException_entry, G3_scratch, ptr_ok);
   Label index_ok;
   cmp(index, tmp);
   throw_if_not_1_icc( lessUnsigned, index_ok );
   if (index_shift > 0)  delayed()->sll(index, index_shift, index);
   else                  delayed()->add(array, index, res); // addr - const offset in index
   // convention: move aberrant index into G3_scratch for exception message
   mov(index, G3_scratch);
   throw_if_not_2( Interpreter::_throw_ArrayIndexOutOfBoundsException_entry, G4_scratch, index_ok);
   // add offset if didn't do it in delay slot
   if (index_shift > 0)   add(array, index, res); // addr - const offset in index
 }
 void InterpreterMacroAssembler::index_check(Register array, Register index, int index_shift, Register tmp, Register res) {
   assert_not_delayed();
   // pop array
   pop_ptr(array);
   // check array
   index_check_without_pop(array, index, index_shift, tmp, res);
 }
 void InterpreterMacroAssembler::get_const(Register Rdst) {
   ld_ptr(Lmethod, in_bytes(methodOopDesc::const_offset()), Rdst);
 }
 void InterpreterMacroAssembler::get_constant_pool(Register Rdst) {
   get_const(Rdst);
   ld_ptr(Rdst, in_bytes(constMethodOopDesc::constants_offset()), Rdst);
 }
 void InterpreterMacroAssembler::get_constant_pool_cache(Register Rdst) {
   get_constant_pool(Rdst);
   ld_ptr(Rdst, constantPoolOopDesc::cache_offset_in_bytes(), Rdst);
 }
 void InterpreterMacroAssembler::get_cpool_and_tags(Register Rcpool, Register Rtags) {
   get_constant_pool(Rcpool);
   ld_ptr(Rcpool, constantPoolOopDesc::tags_offset_in_bytes(), Rtags);
 }
 // unlock if synchronized method
 //
 // Unlock the receiver if this is a synchronized method.
 // Unlock any Java monitors from syncronized blocks.
 //
 // If there are locked Java monitors
 //    If throw_monitor_exception
 //       throws IllegalMonitorStateException
 //    Else if install_monitor_exception
 //       installs IllegalMonitorStateException
 //    Else
 //       no error processing
 void InterpreterMacroAssembler::unlock_if_synchronized_method(TosState state,
                                                               bool throw_monitor_exception,
                                                               bool install_monitor_exception) {
   Label unlocked, unlock, no_unlock;
   // get the value of _do_not_unlock_if_synchronized into G1_scratch
   const Address do_not_unlock_if_synchronized(G2_thread,
     JavaThread::do_not_unlock_if_synchronized_offset());
   ldbool(do_not_unlock_if_synchronized, G1_scratch);
   stbool(G0, do_not_unlock_if_synchronized); // reset the flag
   // check if synchronized method
   const Address access_flags(Lmethod, methodOopDesc::access_flags_offset());
   interp_verify_oop(Otos_i, state, __FILE__, __LINE__);
   push(state); // save tos
   ld(access_flags, G3_scratch); // Load access flags.
   btst(JVM_ACC_SYNCHRONIZED, G3_scratch);
   br(zero, false, pt, unlocked);
   delayed()->nop();
   // Don't unlock anything if the _do_not_unlock_if_synchronized flag
   // is set.
   cmp_zero_and_br(Assembler::notZero, G1_scratch, no_unlock);
   delayed()->nop();
   // BasicObjectLock will be first in list, since this is a synchronized method. However, need
   // to check that the object has not been unlocked by an explicit monitorexit bytecode.
   //Intel: if (throw_monitor_exception) ... else ...
   // Entry already unlocked, need to throw exception
   //...
   // pass top-most monitor elem
   add( top_most_monitor(), O1 );
   ld_ptr(O1, BasicObjectLock::obj_offset_in_bytes(), G3_scratch);
   br_notnull_short(G3_scratch, pt, unlock);
   if (throw_monitor_exception) {
     // Entry already unlocked need to throw an exception
     MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
     should_not_reach_here();
   } else {
     // Monitor already unlocked during a stack unroll.
     // If requested, install an illegal_monitor_state_exception.
     // Continue with stack unrolling.
     if (install_monitor_exception) {
       MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
     }
     ba_short(unlocked);
   }
   bind(unlock);
   unlock_object(O1);
   bind(unlocked);
   // I0, I1: Might contain return value
   // Check that all monitors are unlocked
   { Label loop, exception, entry, restart;
     Register Rmptr   = O0;
     Register Rtemp   = O1;
     Register Rlimit  = Lmonitors;
     const jint delta = frame::interpreter_frame_monitor_size() * wordSize;
     assert( (delta & LongAlignmentMask) == 0,
             "sizeof BasicObjectLock must be even number of doublewords");
     #ifdef ASSERT
     add(top_most_monitor(), Rmptr, delta);
     { Label L;
       // ensure that Rmptr starts out above (or at) Rlimit
       cmp_and_brx_short(Rmptr, Rlimit, Assembler::greaterEqualUnsigned, pn, L);
       stop("monitor stack has negative size");
       bind(L);
     }
     #endif
     bind(restart);
     ba(entry);
     delayed()->
     add(top_most_monitor(), Rmptr, delta);      // points to current entry, starting with bottom-most entry
     // Entry is still locked, need to throw exception
     bind(exception);
     if (throw_monitor_exception) {
       MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
       should_not_reach_here();
     } else {
       // Stack unrolling. Unlock object and if requested, install illegal_monitor_exception.
       // Unlock does not block, so don't have to worry about the frame
       unlock_object(Rmptr);
       if (install_monitor_exception) {
         MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
       }
       ba_short(restart);
     }
     bind(loop);
     cmp(Rtemp, G0);                             // check if current entry is used
     brx(Assembler::notEqual, false, pn, exception);
     delayed()->
     dec(Rmptr, delta);                          // otherwise advance to next entry
     #ifdef ASSERT
     { Label L;
       // ensure that Rmptr has not somehow stepped below Rlimit
       cmp_and_brx_short(Rmptr, Rlimit, Assembler::greaterEqualUnsigned, pn, L);
       stop("ran off the end of the monitor stack");
       bind(L);
     }
     #endif
     bind(entry);
     cmp(Rmptr, Rlimit);                         // check if bottom reached
     brx(Assembler::notEqual, true, pn, loop);   // if not at bottom then check this entry
     delayed()->
     ld_ptr(Rmptr, BasicObjectLock::obj_offset_in_bytes() - delta, Rtemp);
   }
   bind(no_unlock);
   pop(state);
   interp_verify_oop(Otos_i, state, __FILE__, __LINE__);
 }
 // remove activation
 //
 // Unlock the receiver if this is a synchronized method.
 // Unlock any Java monitors from syncronized blocks.
 // Remove the activation from the stack.
 //
 // If there are locked Java monitors
 //    If throw_monitor_exception
 //       throws IllegalMonitorStateException
 //    Else if install_monitor_exception
 //       installs IllegalMonitorStateException
 //    Else
 //       no error processing
 void InterpreterMacroAssembler::remove_activation(TosState state,
                                                   bool throw_monitor_exception,
                                                   bool install_monitor_exception) {
   unlock_if_synchronized_method(state, throw_monitor_exception, install_monitor_exception);
   // save result (push state before jvmti call and pop it afterwards) and notify jvmti
   notify_method_exit(false, state, NotifyJVMTI);
   interp_verify_oop(Otos_i, state, __FILE__, __LINE__);
   verify_oop(Lmethod);
   verify_thread();
   // return tos
   assert(Otos_l1 == Otos_i, "adjust code below");
   switch (state) {
 #ifdef _LP64
   case ltos: mov(Otos_l, Otos_l->after_save()); break; // O0 -> I0
 #else
   case ltos: mov(Otos_l2, Otos_l2->after_save()); // fall through  // O1 -> I1
 #endif
   case btos:                                      // fall through
   case ctos:
   case stos:                                      // fall through
   case atos:                                      // fall through
   case itos: mov(Otos_l1, Otos_l1->after_save());    break;        // O0 -> I0
   case ftos:                                      // fall through
   case dtos:                                      // fall through
   case vtos: /* nothing to do */                     break;
   default  : ShouldNotReachHere();
   }
 #if defined(COMPILER2) && !defined(_LP64)
   if (state == ltos) {
     // C2 expects long results in G1 we can't tell if we're returning to interpreted
     // or compiled so just be safe use G1 and O0/O1
     // Shift bits into high (msb) of G1
     sllx(Otos_l1->after_save(), 32, G1);
     // Zero extend low bits
     srl (Otos_l2->after_save(), 0, Otos_l2->after_save());
     or3 (Otos_l2->after_save(), G1, G1);
   }
 #endif /* COMPILER2 */
 }
 #endif /* CC_INTERP */
 // Lock object
 //
 // Argument - lock_reg points to the BasicObjectLock to be used for locking,
 //            it must be initialized with the object to lock
 void InterpreterMacroAssembler::lock_object(Register lock_reg, Register Object) {
   if (UseHeavyMonitors) {
     call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
   }
   else {
     Register obj_reg = Object;
     Register mark_reg = G4_scratch;
     Register temp_reg = G1_scratch;
     Address  lock_addr(lock_reg, BasicObjectLock::lock_offset_in_bytes());
     Address  mark_addr(obj_reg, oopDesc::mark_offset_in_bytes());
     Label    done;
     Label slow_case;
     assert_different_registers(lock_reg, obj_reg, mark_reg, temp_reg);
     // load markOop from object into mark_reg
     ld_ptr(mark_addr, mark_reg);
     if (UseBiasedLocking) {
       biased_locking_enter(obj_reg, mark_reg, temp_reg, done, &slow_case);
     }
     // get the address of basicLock on stack that will be stored in the object
     // we need a temporary register here as we do not want to clobber lock_reg
     // (cas clobbers the destination register)
     mov(lock_reg, temp_reg);
     // set mark reg to be (markOop of object | UNLOCK_VALUE)
     or3(mark_reg, markOopDesc::unlocked_value, mark_reg);
     // initialize the box  (Must happen before we update the object mark!)
     st_ptr(mark_reg, lock_addr, BasicLock::displaced_header_offset_in_bytes());
     // compare and exchange object_addr, markOop | 1, stack address of basicLock
     assert(mark_addr.disp() == 0, "cas must take a zero displacement");
     casx_under_lock(mark_addr.base(), mark_reg, temp_reg,
       (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr());
     // if the compare and exchange succeeded we are done (we saw an unlocked object)
     cmp_and_brx_short(mark_reg, temp_reg, Assembler::equal, Assembler::pt, done);
     // We did not see an unlocked object so try the fast recursive case
     // Check if owner is self by comparing the value in the markOop of object
     // with the stack pointer
     sub(temp_reg, SP, temp_reg);
 #ifdef _LP64
     sub(temp_reg, STACK_BIAS, temp_reg);
 #endif
     assert(os::vm_page_size() > 0xfff, "page size too small - change the constant");
     // Composite "andcc" test:
     // (a) %sp -vs- markword proximity check, and,
     // (b) verify mark word LSBs == 0 (Stack-locked).
     //
     // FFFFF003/FFFFFFFFFFFF003 is (markOopDesc::lock_mask_in_place | -os::vm_page_size())
     // Note that the page size used for %sp proximity testing is arbitrary and is
     // unrelated to the actual MMU page size.  We use a 'logical' page size of
     // 4096 bytes.   F..FFF003 is designed to fit conveniently in the SIMM13 immediate
     // field of the andcc instruction.
     andcc (temp_reg, 0xFFFFF003, G0) ;
     // if condition is true we are done and hence we can store 0 in the displaced
     // header indicating it is a recursive lock and be done
     brx(Assembler::zero, true, Assembler::pt, done);
     delayed()->st_ptr(G0, lock_addr, BasicLock::displaced_header_offset_in_bytes());
     // none of the above fast optimizations worked so we have to get into the
     // slow case of monitor enter
     bind(slow_case);
     call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
     bind(done);
   }
 }
 // Unlocks an object. Used in monitorexit bytecode and remove_activation.
 //
 // Argument - lock_reg points to the BasicObjectLock for lock
 // Throw IllegalMonitorException if object is not locked by current thread
 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
   if (UseHeavyMonitors) {
     call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
   } else {
     Register obj_reg = G3_scratch;
     Register mark_reg = G4_scratch;
     Register displaced_header_reg = G1_scratch;
     Address  lockobj_addr(lock_reg, BasicObjectLock::obj_offset_in_bytes());
     Address  mark_addr(obj_reg, oopDesc::mark_offset_in_bytes());
     Label    done;
     if (UseBiasedLocking) {
       // load the object out of the BasicObjectLock
       ld_ptr(lockobj_addr, obj_reg);
       biased_locking_exit(mark_addr, mark_reg, done, true);
       st_ptr(G0, lockobj_addr);  // free entry
     }
     // Test first if we are in the fast recursive case
     Address lock_addr(lock_reg, BasicObjectLock::lock_offset_in_bytes() + BasicLock::displaced_header_offset_in_bytes());
     ld_ptr(lock_addr, displaced_header_reg);
     br_null(displaced_header_reg, true, Assembler::pn, done);
     delayed()->st_ptr(G0, lockobj_addr);  // free entry
     // See if it is still a light weight lock, if so we just unlock
     // the object and we are done
     if (!UseBiasedLocking) {
       // load the object out of the BasicObjectLock
       ld_ptr(lockobj_addr, obj_reg);
     }
     // we have the displaced header in displaced_header_reg
     // we expect to see the stack address of the basicLock in case the
     // lock is still a light weight lock (lock_reg)
     assert(mark_addr.disp() == 0, "cas must take a zero displacement");
     casx_under_lock(mark_addr.base(), lock_reg, displaced_header_reg,
       (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr());
     cmp(lock_reg, displaced_header_reg);
     brx(Assembler::equal, true, Assembler::pn, done);
     delayed()->st_ptr(G0, lockobj_addr);  // free entry
     // The lock has been converted into a heavy lock and hence
     // we need to get into the slow case
     call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
     bind(done);
   }
 }
 #ifndef CC_INTERP
 // Get the method data pointer from the methodOop and set the
 // specified register to its value.
 void InterpreterMacroAssembler::set_method_data_pointer() {
   assert(ProfileInterpreter, "must be profiling interpreter");
   Label get_continue;
   ld_ptr(Lmethod, in_bytes(methodOopDesc::method_data_offset()), ImethodDataPtr);
   test_method_data_pointer(get_continue);
   add(ImethodDataPtr, in_bytes(methodDataOopDesc::data_offset()), ImethodDataPtr);
   bind(get_continue);
 }
 // Set the method data pointer for the current bcp.
 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
   assert(ProfileInterpreter, "must be profiling interpreter");
   Label zero_continue;
   // Test MDO to avoid the call if it is NULL.
   ld_ptr(Lmethod, in_bytes(methodOopDesc::method_data_offset()), ImethodDataPtr);
   test_method_data_pointer(zero_continue);
   call_VM_leaf(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), Lmethod, Lbcp);
   add(ImethodDataPtr, in_bytes(methodDataOopDesc::data_offset()), ImethodDataPtr);
   add(ImethodDataPtr, O0, ImethodDataPtr);
   bind(zero_continue);
 }
 // Test ImethodDataPtr.  If it is null, continue at the specified label
 void InterpreterMacroAssembler::test_method_data_pointer(Label& zero_continue) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   br_null_short(ImethodDataPtr, Assembler::pn, zero_continue);
 }
 void InterpreterMacroAssembler::verify_method_data_pointer() {
   assert(ProfileInterpreter, "must be profiling interpreter");
 #ifdef ASSERT
   Label verify_continue;
   test_method_data_pointer(verify_continue);
   // If the mdp is valid, it will point to a DataLayout header which is
   // consistent with the bcp.  The converse is highly probable also.
   lduh(ImethodDataPtr, in_bytes(DataLayout::bci_offset()), G3_scratch);
   ld_ptr(Lmethod, methodOopDesc::const_offset(), O5);
   add(G3_scratch, in_bytes(constMethodOopDesc::codes_offset()), G3_scratch);
   add(G3_scratch, O5, G3_scratch);
   cmp(Lbcp, G3_scratch);
   brx(Assembler::equal, false, Assembler::pt, verify_continue);
   Register temp_reg = O5;
   delayed()->mov(ImethodDataPtr, temp_reg);
   // %%% should use call_VM_leaf here?
   //call_VM_leaf(noreg, ..., Lmethod, Lbcp, ImethodDataPtr);
   save_frame_and_mov(sizeof(jdouble) / wordSize, Lmethod, O0, Lbcp, O1);
   Address d_save(FP, -sizeof(jdouble) + STACK_BIAS);
   stf(FloatRegisterImpl::D, Ftos_d, d_save);
   mov(temp_reg->after_save(), O2);
   save_thread(L7_thread_cache);
   call(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), relocInfo::none);
   delayed()->nop();
   restore_thread(L7_thread_cache);
   ldf(FloatRegisterImpl::D, d_save, Ftos_d);
   restore();
   bind(verify_continue);
 #endif // ASSERT
 }
 void InterpreterMacroAssembler::test_invocation_counter_for_mdp(Register invocation_count,
                                                                 Register Rtmp,
                                                                 Label &profile_continue) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   // Control will flow to "profile_continue" if the counter is less than the
   // limit or if we call profile_method()
   Label done;
   // if no method data exists, and the counter is high enough, make one
   br_notnull_short(ImethodDataPtr, Assembler::pn, done);
   // Test to see if we should create a method data oop
   AddressLiteral profile_limit((address) &InvocationCounter::InterpreterProfileLimit);
   sethi(profile_limit, Rtmp);
   ld(Rtmp, profile_limit.low10(), Rtmp);
   cmp_and_br_short(invocation_count, Rtmp, Assembler::lessUnsigned, Assembler::pn, profile_continue);
   // Build it now.
   call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
   set_method_data_pointer_for_bcp();
   ba_short(profile_continue);
   bind(done);
 }
 // Store a value at some constant offset from the method data pointer.
 void InterpreterMacroAssembler::set_mdp_data_at(int constant, Register value) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   st_ptr(value, ImethodDataPtr, constant);
 }
 void InterpreterMacroAssembler::increment_mdp_data_at(Address counter,
                                                       Register bumped_count,
                                                       bool decrement) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   // Load the counter.
   ld_ptr(counter, bumped_count);
   if (decrement) {
     // Decrement the register.  Set condition codes.
     subcc(bumped_count, DataLayout::counter_increment, bumped_count);
     // If the decrement causes the counter to overflow, stay negative
     Label L;
     brx(Assembler::negative, true, Assembler::pn, L);
     // Store the decremented counter, if it is still negative.
     delayed()->st_ptr(bumped_count, counter);
     bind(L);
   } else {
     // Increment the register.  Set carry flag.
     addcc(bumped_count, DataLayout::counter_increment, bumped_count);
     // If the increment causes the counter to overflow, pull back by 1.
     assert(DataLayout::counter_increment == 1, "subc works");
     subc(bumped_count, G0, bumped_count);
     // Store the incremented counter.
     st_ptr(bumped_count, counter);
   }
 }
 // Increment the value at some constant offset from the method data pointer.
 void InterpreterMacroAssembler::increment_mdp_data_at(int constant,
                                                       Register bumped_count,
                                                       bool decrement) {
   // Locate the counter at a fixed offset from the mdp:
   Address counter(ImethodDataPtr, constant);
   increment_mdp_data_at(counter, bumped_count, decrement);
 }
 // Increment the value at some non-fixed (reg + constant) offset from
 // the method data pointer.
 void InterpreterMacroAssembler::increment_mdp_data_at(Register reg,
                                                       int constant,
                                                       Register bumped_count,
                                                       Register scratch2,
                                                       bool decrement) {
   // Add the constant to reg to get the offset.
   add(ImethodDataPtr, reg, scratch2);
   Address counter(scratch2, constant);
   increment_mdp_data_at(counter, bumped_count, decrement);
 }
 // Set a flag value at the current method data pointer position.
 // Updates a single byte of the header, to avoid races with other header bits.
 void InterpreterMacroAssembler::set_mdp_flag_at(int flag_constant,
                                                 Register scratch) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   // Load the data header
   ldub(ImethodDataPtr, in_bytes(DataLayout::flags_offset()), scratch);
   // Set the flag
   or3(scratch, flag_constant, scratch);
   // Store the modified header.
   stb(scratch, ImethodDataPtr, in_bytes(DataLayout::flags_offset()));
 }
 // Test the location at some offset from the method data pointer.
 // If it is not equal to value, branch to the not_equal_continue Label.
 // Set condition codes to match the nullness of the loaded value.
 void InterpreterMacroAssembler::test_mdp_data_at(int offset,
                                                  Register value,
                                                  Label& not_equal_continue,
                                                  Register scratch) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   ld_ptr(ImethodDataPtr, offset, scratch);
   cmp(value, scratch);
   brx(Assembler::notEqual, false, Assembler::pn, not_equal_continue);
   delayed()->tst(scratch);
 }
 // Update the method data pointer by the displacement located at some fixed
 // offset from the method data pointer.
 void InterpreterMacroAssembler::update_mdp_by_offset(int offset_of_disp,
                                                      Register scratch) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   ld_ptr(ImethodDataPtr, offset_of_disp, scratch);
   add(ImethodDataPtr, scratch, ImethodDataPtr);
 }
 // Update the method data pointer by the displacement located at the
 // offset (reg + offset_of_disp).
 void InterpreterMacroAssembler::update_mdp_by_offset(Register reg,
                                                      int offset_of_disp,
                                                      Register scratch) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   add(reg, offset_of_disp, scratch);
   ld_ptr(ImethodDataPtr, scratch, scratch);
   add(ImethodDataPtr, scratch, ImethodDataPtr);
 }
 // Update the method data pointer by a simple constant displacement.
 void InterpreterMacroAssembler::update_mdp_by_constant(int constant) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   add(ImethodDataPtr, constant, ImethodDataPtr);
 }
 // Update the method data pointer for a _ret bytecode whose target
 // was not among our cached targets.
 void InterpreterMacroAssembler::update_mdp_for_ret(TosState state,
                                                    Register return_bci) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   push(state);
   st_ptr(return_bci, l_tmp);  // protect return_bci, in case it is volatile
   call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), return_bci);
   ld_ptr(l_tmp, return_bci);
   pop(state);
 }
 // Count a taken branch in the bytecodes.
 void InterpreterMacroAssembler::profile_taken_branch(Register scratch, Register bumped_count) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(profile_continue);
     // We are taking a branch.  Increment the taken count.
     increment_mdp_data_at(in_bytes(JumpData::taken_offset()), bumped_count);
     // The method data pointer needs to be updated to reflect the new target.
     update_mdp_by_offset(in_bytes(JumpData::displacement_offset()), scratch);
     bind (profile_continue);
   }
 }
 // Count a not-taken branch in the bytecodes.
 void InterpreterMacroAssembler::profile_not_taken_branch(Register scratch) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(profile_continue);
     // We are taking a branch.  Increment the not taken count.
     increment_mdp_data_at(in_bytes(BranchData::not_taken_offset()), scratch);
     // The method data pointer needs to be updated to correspond to the
     // next bytecode.
     update_mdp_by_constant(in_bytes(BranchData::branch_data_size()));
     bind (profile_continue);
   }
 }
 // Count a non-virtual call in the bytecodes.
 void InterpreterMacroAssembler::profile_call(Register scratch) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(profile_continue);
     // We are making a call.  Increment the count.
     increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch);
     // The method data pointer needs to be updated to reflect the new target.
     update_mdp_by_constant(in_bytes(CounterData::counter_data_size()));
     bind (profile_continue);
   }
 }
 // Count a final call in the bytecodes.
 void InterpreterMacroAssembler::profile_final_call(Register scratch) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(profile_continue);
     // We are making a call.  Increment the count.
     increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch);
     // The method data pointer needs to be updated to reflect the new target.
     update_mdp_by_constant(in_bytes(VirtualCallData::virtual_call_data_size()));
     bind (profile_continue);
   }
 }
 // Count a virtual call in the bytecodes.
 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
                                                      Register scratch,
                                                      bool receiver_can_be_null) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(profile_continue);
     Label skip_receiver_profile;
     if (receiver_can_be_null) {
       Label not_null;
       br_notnull_short(receiver, Assembler::pt, not_null);
       // We are making a call.  Increment the count for null receiver.
       increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch);
       ba_short(skip_receiver_profile);
       bind(not_null);
     }
     // Record the receiver type.
     record_klass_in_profile(receiver, scratch, true);
     bind(skip_receiver_profile);
     // The method data pointer needs to be updated to reflect the new target.
     update_mdp_by_constant(in_bytes(VirtualCallData::virtual_call_data_size()));
     bind (profile_continue);
   }
 }
 void InterpreterMacroAssembler::record_klass_in_profile_helper(
                                         Register receiver, Register scratch,
                                         int start_row, Label& done, bool is_virtual_call) {
   if (TypeProfileWidth == 0) {
     if (is_virtual_call) {
       increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch);
     }
     return;
   }
   int last_row = VirtualCallData::row_limit() - 1;
   assert(start_row <= last_row, "must be work left to do");
   // Test this row for both the receiver and for null.
   // Take any of three different outcomes:
   //   1. found receiver => increment count and goto done
   //   2. found null => keep looking for case 1, maybe allocate this cell
   //   3. found something else => keep looking for cases 1 and 2
   // Case 3 is handled by a recursive call.
   for (int row = start_row; row <= last_row; row++) {
     Label next_test;
     bool test_for_null_also = (row == start_row);
     // See if the receiver is receiver[n].
     int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row));
     test_mdp_data_at(recvr_offset, receiver, next_test, scratch);
     // delayed()->tst(scratch);
     // The receiver is receiver[n].  Increment count[n].
     int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row));
     increment_mdp_data_at(count_offset, scratch);
     ba_short(done);
     bind(next_test);
     if (test_for_null_also) {
       Label found_null;
       // Failed the equality check on receiver[n]...  Test for null.
       if (start_row == last_row) {
         // The only thing left to do is handle the null case.
         if (is_virtual_call) {
           brx(Assembler::zero, false, Assembler::pn, found_null);
           delayed()->nop();
           // Receiver did not match any saved receiver and there is no empty row for it.
           // Increment total counter to indicate polymorphic case.
           increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch);
           ba_short(done);
           bind(found_null);
         } else {
           brx(Assembler::notZero, false, Assembler::pt, done);
           delayed()->nop();
         }
         break;
       }
       // Since null is rare, make it be the branch-taken case.
       brx(Assembler::zero, false, Assembler::pn, found_null);
       delayed()->nop();
       // Put all the "Case 3" tests here.
       record_klass_in_profile_helper(receiver, scratch, start_row + 1, done, is_virtual_call);
       // Found a null.  Keep searching for a matching receiver,
       // but remember that this is an empty (unused) slot.
       bind(found_null);
     }
   }
   // In the fall-through case, we found no matching receiver, but we
   // observed the receiver[start_row] is NULL.
   // Fill in the receiver field and increment the count.
   int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row));
   set_mdp_data_at(recvr_offset, receiver);
   int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row));
   mov(DataLayout::counter_increment, scratch);
   set_mdp_data_at(count_offset, scratch);
   if (start_row > 0) {
     ba_short(done);
   }
 }
 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
                                                         Register scratch, bool is_virtual_call) {
   assert(ProfileInterpreter, "must be profiling");
   Label done;
   record_klass_in_profile_helper(receiver, scratch, 0, done, is_virtual_call);
   bind (done);
 }
 // Count a ret in the bytecodes.
 void InterpreterMacroAssembler::profile_ret(TosState state,
                                             Register return_bci,
                                             Register scratch) {
   if (ProfileInterpreter) {
     Label profile_continue;
     uint row;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(profile_continue);
     // Update the total ret count.
     increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch);
     for (row = 0; row < RetData::row_limit(); row++) {
       Label next_test;
       // See if return_bci is equal to bci[n]:
       test_mdp_data_at(in_bytes(RetData::bci_offset(row)),
                        return_bci, next_test, scratch);
       // return_bci is equal to bci[n].  Increment the count.
       increment_mdp_data_at(in_bytes(RetData::bci_count_offset(row)), scratch);
       // The method data pointer needs to be updated to reflect the new target.
       update_mdp_by_offset(in_bytes(RetData::bci_displacement_offset(row)), scratch);
       ba_short(profile_continue);
       bind(next_test);
     }
     update_mdp_for_ret(state, return_bci);
     bind (profile_continue);
   }
 }
 // Profile an unexpected null in the bytecodes.
 void InterpreterMacroAssembler::profile_null_seen(Register scratch) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(profile_continue);
     set_mdp_flag_at(BitData::null_seen_byte_constant(), scratch);
     // The method data pointer needs to be updated.
     int mdp_delta = in_bytes(BitData::bit_data_size());
     if (TypeProfileCasts) {
       mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
     }
     update_mdp_by_constant(mdp_delta);
     bind (profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_typecheck(Register klass,
                                                   Register scratch) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(profile_continue);
     int mdp_delta = in_bytes(BitData::bit_data_size());
     if (TypeProfileCasts) {
       mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
       // Record the object type.
       record_klass_in_profile(klass, scratch, false);
     }
     // The method data pointer needs to be updated.
     update_mdp_by_constant(mdp_delta);
     bind (profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_typecheck_failed(Register scratch) {
   if (ProfileInterpreter && TypeProfileCasts) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(profile_continue);
     int count_offset = in_bytes(CounterData::count_offset());
     // Back up the address, since we have already bumped the mdp.
     count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
     // *Decrement* the counter.  We expect to see zero or small negatives.
     increment_mdp_data_at(count_offset, scratch, true);
     bind (profile_continue);
   }
 }
 // Count the default case of a switch construct.
 void InterpreterMacroAssembler::profile_switch_default(Register scratch) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(profile_continue);
     // Update the default case count
     increment_mdp_data_at(in_bytes(MultiBranchData::default_count_offset()),
                           scratch);
     // The method data pointer needs to be updated.
     update_mdp_by_offset(
                     in_bytes(MultiBranchData::default_displacement_offset()),
                     scratch);
     bind (profile_continue);
   }
 }
 // Count the index'th case of a switch construct.
 void InterpreterMacroAssembler::profile_switch_case(Register index,
                                                     Register scratch,
                                                     Register scratch2,
                                                     Register scratch3) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(profile_continue);
     // Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes()
     set(in_bytes(MultiBranchData::per_case_size()), scratch);
     smul(index, scratch, scratch);
     add(scratch, in_bytes(MultiBranchData::case_array_offset()), scratch);
     // Update the case count
     increment_mdp_data_at(scratch,
                           in_bytes(MultiBranchData::relative_count_offset()),
                           scratch2,
                           scratch3);
     // The method data pointer needs to be updated.
     update_mdp_by_offset(scratch,
                      in_bytes(MultiBranchData::relative_displacement_offset()),
                      scratch2);
     bind (profile_continue);
   }
 }
 // add a InterpMonitorElem to stack (see frame_sparc.hpp)
 void InterpreterMacroAssembler::add_monitor_to_stack( bool stack_is_empty,
                                                       Register Rtemp,
                                                       Register Rtemp2 ) {
   Register Rlimit = Lmonitors;
   const jint delta = frame::interpreter_frame_monitor_size() * wordSize;
   assert( (delta & LongAlignmentMask) == 0,
           "sizeof BasicObjectLock must be even number of doublewords");
   sub( SP,        delta, SP);
   sub( Lesp,      delta, Lesp);
   sub( Lmonitors, delta, Lmonitors);
   if (!stack_is_empty) {
     // must copy stack contents down
     Label start_copying, next;
     // untested("monitor stack expansion");
     compute_stack_base(Rtemp);
     ba(start_copying);
     delayed()->cmp(Rtemp, Rlimit); // done? duplicated below
     // note: must copy from low memory upwards
     // On entry to loop,
     // Rtemp points to new base of stack, Lesp points to new end of stack (1 past TOS)
     // Loop mutates Rtemp
     bind( next);
     st_ptr(Rtemp2, Rtemp, 0);
     inc(Rtemp, wordSize);
     cmp(Rtemp, Rlimit); // are we done? (duplicated above)
     bind( start_copying );
     brx( notEqual, true, pn, next );
     delayed()->ld_ptr( Rtemp, delta, Rtemp2 );
     // done copying stack
   }
 }
 // Locals
 void InterpreterMacroAssembler::access_local_ptr( Register index, Register dst ) {
   assert_not_delayed();
   sll(index, Interpreter::logStackElementSize, index);
   sub(Llocals, index, index);
   ld_ptr(index, 0, dst);
   // Note:  index must hold the effective address--the iinc template uses it
 }
 // Just like access_local_ptr but the tag is a returnAddress
 void InterpreterMacroAssembler::access_local_returnAddress(Register index,
                                                            Register dst ) {
   assert_not_delayed();
   sll(index, Interpreter::logStackElementSize, index);
   sub(Llocals, index, index);
   ld_ptr(index, 0, dst);
 }
 void InterpreterMacroAssembler::access_local_int( Register index, Register dst ) {
   assert_not_delayed();
   sll(index, Interpreter::logStackElementSize, index);
   sub(Llocals, index, index);
   ld(index, 0, dst);
   // Note:  index must hold the effective address--the iinc template uses it
 }
 void InterpreterMacroAssembler::access_local_long( Register index, Register dst ) {
   assert_not_delayed();
   sll(index, Interpreter::logStackElementSize, index);
   sub(Llocals, index, index);
   // First half stored at index n+1 (which grows down from Llocals[n])
   load_unaligned_long(index, Interpreter::local_offset_in_bytes(1), dst);
 }
 void InterpreterMacroAssembler::access_local_float( Register index, FloatRegister dst ) {
   assert_not_delayed();
   sll(index, Interpreter::logStackElementSize, index);
   sub(Llocals, index, index);
   ldf(FloatRegisterImpl::S, index, 0, dst);
 }
 void InterpreterMacroAssembler::access_local_double( Register index, FloatRegister dst ) {
   assert_not_delayed();
   sll(index, Interpreter::logStackElementSize, index);
   sub(Llocals, index, index);
   load_unaligned_double(index, Interpreter::local_offset_in_bytes(1), dst);
 }
 #ifdef ASSERT
 void InterpreterMacroAssembler::check_for_regarea_stomp(Register Rindex, int offset, Register Rlimit, Register Rscratch, Register Rscratch1) {
   Label L;
   assert(Rindex != Rscratch, "Registers cannot be same");
   assert(Rindex != Rscratch1, "Registers cannot be same");
   assert(Rlimit != Rscratch, "Registers cannot be same");
   assert(Rlimit != Rscratch1, "Registers cannot be same");
   assert(Rscratch1 != Rscratch, "Registers cannot be same");
   // untested("reg area corruption");
   add(Rindex, offset, Rscratch);
   add(Rlimit, 64 + STACK_BIAS, Rscratch1);
   cmp_and_brx_short(Rscratch, Rscratch1, Assembler::greaterEqualUnsigned, pn, L);
   stop("regsave area is being clobbered");
   bind(L);
 }
 #endif // ASSERT
 void InterpreterMacroAssembler::store_local_int( Register index, Register src ) {
   assert_not_delayed();
   sll(index, Interpreter::logStackElementSize, index);
   sub(Llocals, index, index);
   debug_only(check_for_regarea_stomp(index, 0, FP, G1_scratch, G4_scratch);)
   st(src, index, 0);
 }
 void InterpreterMacroAssembler::store_local_ptr( Register index, Register src ) {
   assert_not_delayed();
   sll(index, Interpreter::logStackElementSize, index);
   sub(Llocals, index, index);
 #ifdef ASSERT
   check_for_regarea_stomp(index, 0, FP, G1_scratch, G4_scratch);
 #endif
   st_ptr(src, index, 0);
 }
 void InterpreterMacroAssembler::store_local_ptr( int n, Register src ) {
   st_ptr(src, Llocals, Interpreter::local_offset_in_bytes(n));
 }
 void InterpreterMacroAssembler::store_local_long( Register index, Register src ) {
   assert_not_delayed();
   sll(index, Interpreter::logStackElementSize, index);
   sub(Llocals, index, index);
 #ifdef ASSERT
   check_for_regarea_stomp(index, Interpreter::local_offset_in_bytes(1), FP, G1_scratch, G4_scratch);
 #endif
   store_unaligned_long(src, index, Interpreter::local_offset_in_bytes(1)); // which is n+1
 }
 void InterpreterMacroAssembler::store_local_float( Register index, FloatRegister src ) {
   assert_not_delayed();
   sll(index, Interpreter::logStackElementSize, index);
   sub(Llocals, index, index);
 #ifdef ASSERT
   check_for_regarea_stomp(index, 0, FP, G1_scratch, G4_scratch);
 #endif
   stf(FloatRegisterImpl::S, src, index, 0);
 }
 void InterpreterMacroAssembler::store_local_double( Register index, FloatRegister src ) {
   assert_not_delayed();
   sll(index, Interpreter::logStackElementSize, index);
   sub(Llocals, index, index);
 #ifdef ASSERT
   check_for_regarea_stomp(index, Interpreter::local_offset_in_bytes(1), FP, G1_scratch, G4_scratch);
 #endif
   store_unaligned_double(src, index, Interpreter::local_offset_in_bytes(1));
 }
 int InterpreterMacroAssembler::top_most_monitor_byte_offset() {
   const jint delta = frame::interpreter_frame_monitor_size() * wordSize;
   int rounded_vm_local_words = ::round_to(frame::interpreter_frame_vm_local_words, WordsPerLong);
   return ((-rounded_vm_local_words * wordSize) - delta ) + STACK_BIAS;
 }
 Address InterpreterMacroAssembler::top_most_monitor() {
   return Address(FP, top_most_monitor_byte_offset());
 }
 void InterpreterMacroAssembler::compute_stack_base( Register Rdest ) {
   add( Lesp,      wordSize,                                    Rdest );
 }
 #endif /* CC_INTERP */
 void InterpreterMacroAssembler::increment_invocation_counter( Register Rtmp, Register Rtmp2 ) {
   assert(UseCompiler, "incrementing must be useful");
 #ifdef CC_INTERP
   Address inv_counter(G5_method, methodOopDesc::invocation_counter_offset() +
                                  InvocationCounter::counter_offset());
   Address be_counter (G5_method, methodOopDesc::backedge_counter_offset() +
                                  InvocationCounter::counter_offset());
 #else
   Address inv_counter(Lmethod, methodOopDesc::invocation_counter_offset() +
                                InvocationCounter::counter_offset());
   Address be_counter (Lmethod, methodOopDesc::backedge_counter_offset() +
                                InvocationCounter::counter_offset());
 #endif /* CC_INTERP */
   int delta = InvocationCounter::count_increment;
   // Load each counter in a register
   ld( inv_counter, Rtmp );
   ld( be_counter, Rtmp2 );
   assert( is_simm13( delta ), " delta too large.");
   // Add the delta to the invocation counter and store the result
   add( Rtmp, delta, Rtmp );
   // Mask the backedge counter
   and3( Rtmp2, InvocationCounter::count_mask_value, Rtmp2 );
   // Store value
   st( Rtmp, inv_counter);
   // Add invocation counter + backedge counter
   add( Rtmp, Rtmp2, Rtmp);
   // Note that this macro must leave the backedge_count + invocation_count in Rtmp!
 }
 void InterpreterMacroAssembler::increment_backedge_counter( Register Rtmp, Register Rtmp2 ) {
   assert(UseCompiler, "incrementing must be useful");
 #ifdef CC_INTERP
   Address be_counter (G5_method, methodOopDesc::backedge_counter_offset() +
                                  InvocationCounter::counter_offset());
   Address inv_counter(G5_method, methodOopDesc::invocation_counter_offset() +
                                  InvocationCounter::counter_offset());
 #else
   Address be_counter (Lmethod, methodOopDesc::backedge_counter_offset() +
                                InvocationCounter::counter_offset());
   Address inv_counter(Lmethod, methodOopDesc::invocation_counter_offset() +
                                InvocationCounter::counter_offset());
 #endif /* CC_INTERP */
   int delta = InvocationCounter::count_increment;
   // Load each counter in a register
   ld( be_counter, Rtmp );
   ld( inv_counter, Rtmp2 );
   // Add the delta to the backedge counter
   add( Rtmp, delta, Rtmp );
   // Mask the invocation counter, add to backedge counter
   and3( Rtmp2, InvocationCounter::count_mask_value, Rtmp2 );
   // and store the result to memory
   st( Rtmp, be_counter );
   // Add backedge + invocation counter
   add( Rtmp, Rtmp2, Rtmp );
   // Note that this macro must leave backedge_count + invocation_count in Rtmp!
 }
 #ifndef CC_INTERP
 void InterpreterMacroAssembler::test_backedge_count_for_osr( Register backedge_count,
                                                              Register branch_bcp,
                                                              Register Rtmp ) {
   Label did_not_overflow;
   Label overflow_with_error;
   assert_different_registers(backedge_count, Rtmp, branch_bcp);
   assert(UseOnStackReplacement,"Must UseOnStackReplacement to test_backedge_count_for_osr");
   AddressLiteral limit(&InvocationCounter::InterpreterBackwardBranchLimit);
   load_contents(limit, Rtmp);
   cmp_and_br_short(backedge_count, Rtmp, Assembler::lessUnsigned, Assembler::pt, did_not_overflow);
   // When ProfileInterpreter is on, the backedge_count comes from the
   // methodDataOop, which value does not get reset on the call to
   // frequency_counter_overflow().  To avoid excessive calls to the overflow
   // routine while the method is being compiled, add a second test to make sure
   // the overflow function is called only once every overflow_frequency.
   if (ProfileInterpreter) {
     const int overflow_frequency = 1024;
     andcc(backedge_count, overflow_frequency-1, Rtmp);
     brx(Assembler::notZero, false, Assembler::pt, did_not_overflow);
     delayed()->nop();
   }
   // overflow in loop, pass branch bytecode
   set(6,Rtmp);
   call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), branch_bcp, Rtmp);
   // Was an OSR adapter generated?
   // O0 = osr nmethod
   br_null_short(O0, Assembler::pn, overflow_with_error);
   // Has the nmethod been invalidated already?
   ld(O0, nmethod::entry_bci_offset(), O2);
   cmp_and_br_short(O2, InvalidOSREntryBci, Assembler::equal, Assembler::pn, overflow_with_error);
   // migrate the interpreter frame off of the stack
   mov(G2_thread, L7);
   // save nmethod
   mov(O0, L6);
   set_last_Java_frame(SP, noreg);
   call_VM_leaf(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin), L7);
   reset_last_Java_frame();
   mov(L7, G2_thread);
   // move OSR nmethod to I1
   mov(L6, I1);
   // OSR buffer to I0
   mov(O0, I0);
   // remove the interpreter frame
   restore(I5_savedSP, 0, SP);
   // Jump to the osr code.
   ld_ptr(O1, nmethod::osr_entry_point_offset(), O2);
   jmp(O2, G0);
   delayed()->nop();
   bind(overflow_with_error);
   bind(did_not_overflow);
 }
 void InterpreterMacroAssembler::interp_verify_oop(Register reg, TosState state, const char * file, int line) {
   if (state == atos) { MacroAssembler::_verify_oop(reg, "broken oop ", file, line); }
 }
 // local helper function for the verify_oop_or_return_address macro
 static bool verify_return_address(methodOopDesc* m, int bci) {
 #ifndef PRODUCT
   address pc = (address)(m->constMethod())
              + in_bytes(constMethodOopDesc::codes_offset()) + bci;
   // assume it is a valid return address if it is inside m and is preceded by a jsr
   if (!m->contains(pc))                                          return false;
   address jsr_pc;
   jsr_pc = pc - Bytecodes::length_for(Bytecodes::_jsr);
   if (*jsr_pc == Bytecodes::_jsr   && jsr_pc >= m->code_base())    return true;
   jsr_pc = pc - Bytecodes::length_for(Bytecodes::_jsr_w);
   if (*jsr_pc == Bytecodes::_jsr_w && jsr_pc >= m->code_base())    return true;
 #endif // PRODUCT
   return false;
 }
 void InterpreterMacroAssembler::verify_oop_or_return_address(Register reg, Register Rtmp) {
   if (!VerifyOops)  return;
   // the VM documentation for the astore[_wide] bytecode allows
   // the TOS to be not only an oop but also a return address
   Label test;
   Label skip;
   // See if it is an address (in the current method):
   mov(reg, Rtmp);
   const int log2_bytecode_size_limit = 16;
   srl(Rtmp, log2_bytecode_size_limit, Rtmp);
   br_notnull_short( Rtmp, pt, test );
   // %%% should use call_VM_leaf here?
   save_frame_and_mov(0, Lmethod, O0, reg, O1);
   save_thread(L7_thread_cache);
   call(CAST_FROM_FN_PTR(address,verify_return_address), relocInfo::none);
   delayed()->nop();
   restore_thread(L7_thread_cache);
   br_notnull( O0, false, pt, skip );
   delayed()->restore();
   // Perform a more elaborate out-of-line call
   // Not an address; verify it:
   bind(test);
   verify_oop(reg);
   bind(skip);
 }
 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
   if (state == ftos || state == dtos) MacroAssembler::verify_FPU(stack_depth);
 }
 #endif /* CC_INTERP */
 // Inline assembly for:
 //
 // if (thread is in interp_only_mode) {
 //   InterpreterRuntime::post_method_entry();
 // }
 // if (DTraceMethodProbes) {
 //   SharedRuntime::dtrace_method_entry(method, receiver);
 // }
 // if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) {
 //   SharedRuntime::rc_trace_method_entry(method, receiver);
 // }
 void InterpreterMacroAssembler::notify_method_entry() {
   // C++ interpreter only uses this for native methods.
   // Whenever JVMTI puts a thread in interp_only_mode, method
   // entry/exit events are sent for that thread to track stack
   // depth.  If it is possible to enter interp_only_mode we add
   // the code to check if the event should be sent.
   if (JvmtiExport::can_post_interpreter_events()) {
     Label L;
     Register temp_reg = O5;
     const Address interp_only(G2_thread, JavaThread::interp_only_mode_offset());
     ld(interp_only, temp_reg);
     cmp_and_br_short(temp_reg, 0, equal, pt, L);
     call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_entry));
     bind(L);
   }
   {
     Register temp_reg = O5;
     SkipIfEqual skip_if(this, temp_reg, &DTraceMethodProbes, zero);
     call_VM_leaf(noreg,
       CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
       G2_thread, Lmethod);
   }
   // RedefineClasses() tracing support for obsolete method entry
   if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) {
     call_VM_leaf(noreg,
       CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
       G2_thread, Lmethod);
   }
 }
 // Inline assembly for:
 //
 // if (thread is in interp_only_mode) {
 //   // save result
 //   InterpreterRuntime::post_method_exit();
 //   // restore result
 // }
 // if (DTraceMethodProbes) {
 //   SharedRuntime::dtrace_method_exit(thread, method);
 // }
 //
 // Native methods have their result stored in d_tmp and l_tmp
 // Java methods have their result stored in the expression stack
 void InterpreterMacroAssembler::notify_method_exit(bool is_native_method,
                                                    TosState state,
                                                    NotifyMethodExitMode mode) {
   // C++ interpreter only uses this for native methods.
   // Whenever JVMTI puts a thread in interp_only_mode, method
   // entry/exit events are sent for that thread to track stack
   // depth.  If it is possible to enter interp_only_mode we add
   // the code to check if the event should be sent.
   if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
     Label L;
     Register temp_reg = O5;
     const Address interp_only(G2_thread, JavaThread::interp_only_mode_offset());
     ld(interp_only, temp_reg);
     cmp_and_br_short(temp_reg, 0, equal, pt, L);
     // Note: frame::interpreter_frame_result has a dependency on how the
     // method result is saved across the call to post_method_exit. For
     // native methods it assumes the result registers are saved to
     // l_scratch and d_scratch. If this changes then the interpreter_frame_result
     // implementation will need to be updated too.
     save_return_value(state, is_native_method);
     call_VM(noreg,
             CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
     restore_return_value(state, is_native_method);
     bind(L);
   }
   {
     Register temp_reg = O5;
     // Dtrace notification
     SkipIfEqual skip_if(this, temp_reg, &DTraceMethodProbes, zero);
     save_return_value(state, is_native_method);
     call_VM_leaf(
       noreg,
       CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
       G2_thread, Lmethod);
     restore_return_value(state, is_native_method);
   }
 }
 void InterpreterMacroAssembler::save_return_value(TosState state, bool is_native_call) {
 #ifdef CC_INTERP
   // result potentially in O0/O1: save it across calls
   stf(FloatRegisterImpl::D, F0, STATE(_native_fresult));
 #ifdef _LP64
   stx(O0, STATE(_native_lresult));
 #else
   std(O0, STATE(_native_lresult));
 #endif
 #else // CC_INTERP
   if (is_native_call) {
     stf(FloatRegisterImpl::D, F0, d_tmp);
 #ifdef _LP64
     stx(O0, l_tmp);
 #else
     std(O0, l_tmp);
 #endif
   } else {
     push(state);
   }
 #endif // CC_INTERP
 }
 void InterpreterMacroAssembler::restore_return_value( TosState state, bool is_native_call) {
 #ifdef CC_INTERP
   ldf(FloatRegisterImpl::D, STATE(_native_fresult), F0);
 #ifdef _LP64
   ldx(STATE(_native_lresult), O0);
 #else
   ldd(STATE(_native_lresult), O0);
 #endif
 #else // CC_INTERP
   if (is_native_call) {
     ldf(FloatRegisterImpl::D, d_tmp, F0);
 #ifdef _LP64
     ldx(l_tmp, O0);
 #else
     ldd(l_tmp, O0);
 #endif
   } else {
     pop(state);
   }
 #endif // CC_INTERP
 }
 // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
                                                         int increment, int mask,
                                                         Register scratch1, Register scratch2,
                                                         Condition cond, Label *where) {
   ld(counter_addr, scratch1);
   add(scratch1, increment, scratch1);
   if (is_simm13(mask)) {
     andcc(scratch1, mask, G0);
   } else {
     set(mask, scratch2);
     andcc(scratch1, scratch2,  G0);
   }
   br(cond, false, Assembler::pn, *where);
   delayed()->st(scratch1, counter_addr);
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/sparc/vm/interp_masm_sparc.cpp@2fe087c3e814 (annotated)

src/cpu/sparc/vm/interp_masm_sparc.cpp