jdk8-mips64-public/hotspot: src/cpu/x86/vm/interp_masm_x86

src/cpu/x86/vm/interp_masm_x86_64.cpp@37f87013dfd8 (annotated)

src/cpu/x86/vm/interp_masm_x86_64.cpp

Thu, 05 Jun 2008 15:57:56 -0700

author: ysr
date: Thu, 05 Jun 2008 15:57:56 -0700
changeset 777: 37f87013dfd8
parent 548: ba764ed4b6f2
child 779: 6aae2f9d0294
permissions: -rw-r--r--

6711316: Open source the Garbage-First garbage collector
Summary: First mercurial integration of the code for the Garbage-First garbage collector.
Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr

 /*
  * Copyright 2003-2007 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/_interp_masm_x86_64.cpp.incl"
 // Implementation of InterpreterMacroAssembler
 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point,
                                                   int number_of_arguments) {
   // interpreter specific
   //
   // Note: No need to save/restore bcp & locals (r13 & r14) pointer
   //       since these are callee saved registers and no blocking/
   //       GC can happen in leaf calls.
   // Further Note: DO NOT save/restore bcp/locals. If a caller has
   // already saved them so that it can use esi/edi as temporaries
   // then a save/restore here will DESTROY the copy the caller
   // saved! There used to be a save_bcp() that only happened in
   // the ASSERT path (no restore_bcp). Which caused bizarre failures
   // when jvm built with ASSERTs.
 #ifdef ASSERT
   {
     Label L;
     cmpq(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int)NULL_WORD);
     jcc(Assembler::equal, L);
     stop("InterpreterMacroAssembler::call_VM_leaf_base:"
          " last_sp != NULL");
     bind(L);
   }
 #endif
   // super call
   MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
   // interpreter specific
   // Used to ASSERT that r13/r14 were equal to frame's bcp/locals
   // but since they may not have been saved (and we don't want to
   // save thme here (see note above) the assert is invalid.
 }
 void InterpreterMacroAssembler::call_VM_base(Register oop_result,
                                              Register java_thread,
                                              Register last_java_sp,
                                              address  entry_point,
                                              int      number_of_arguments,
                                              bool     check_exceptions) {
   // interpreter specific
   //
   // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
   //       really make a difference for these runtime calls, since they are
   //       slow anyway. Btw., bcp must be saved/restored since it may change
   //       due to GC.
   // assert(java_thread == noreg , "not expecting a precomputed java thread");
   save_bcp();
 #ifdef ASSERT
   {
     Label L;
     cmpq(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int)NULL_WORD);
     jcc(Assembler::equal, L);
     stop("InterpreterMacroAssembler::call_VM_leaf_base:"
          " last_sp != NULL");
     bind(L);
   }
 #endif /* ASSERT */
   // super call
   MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp,
                                entry_point, number_of_arguments,
                                check_exceptions);
   // interpreter specific
   restore_bcp();
   restore_locals();
 }
 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
   if (JvmtiExport::can_pop_frame()) {
     Label L;
     // 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.
     // This method is only called just after the call into the vm in
     // call_VM_base, so the arg registers are available.
     movl(c_rarg0, Address(r15_thread, JavaThread::popframe_condition_offset()));
     testl(c_rarg0, JavaThread::popframe_pending_bit);
     jcc(Assembler::zero, L);
     testl(c_rarg0, JavaThread::popframe_processing_bit);
     jcc(Assembler::notZero, L);
     // Call Interpreter::remove_activation_preserving_args_entry() to get the
     // address of the same-named entrypoint in the generated interpreter code.
     call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
     jmp(rax);
     bind(L);
   }
 }
 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
   movq(rcx, Address(r15_thread, JavaThread::jvmti_thread_state_offset()));
   const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset());
   const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset());
   const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset());
   switch (state) {
     case atos: movq(rax, oop_addr);
                movptr(oop_addr, NULL_WORD);
                verify_oop(rax, state);              break;
     case ltos: movq(rax, val_addr);                 break;
     case btos:                                   // fall through
     case ctos:                                   // fall through
     case stos:                                   // fall through
     case itos: movl(rax, val_addr);                 break;
     case ftos: movflt(xmm0, val_addr);              break;
     case dtos: movdbl(xmm0, val_addr);              break;
     case vtos: /* nothing to do */                  break;
     default  : ShouldNotReachHere();
   }
   // Clean up tos value in the thread object
   movl(tos_addr,  (int) ilgl);
   movl(val_addr,  (int) NULL_WORD);
 }
 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
   if (JvmtiExport::can_force_early_return()) {
     Label L;
     movq(c_rarg0, Address(r15_thread, JavaThread::jvmti_thread_state_offset()));
     testq(c_rarg0, c_rarg0);
     jcc(Assembler::zero, 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.
     movl(c_rarg0, Address(c_rarg0, JvmtiThreadState::earlyret_state_offset()));
     cmpl(c_rarg0, JvmtiThreadState::earlyret_pending);
     jcc(Assembler::notEqual, L);
     // Call Interpreter::remove_activation_early_entry() to get the address of the
     // same-named entrypoint in the generated interpreter code.
     movq(c_rarg0, Address(r15_thread, JavaThread::jvmti_thread_state_offset()));
     movl(c_rarg0, Address(c_rarg0, JvmtiThreadState::earlyret_tos_offset()));
     call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), c_rarg0);
     jmp(rax);
     bind(L);
   }
 }
 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(
   Register reg,
   int bcp_offset) {
   assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
   movl(reg, Address(r13, bcp_offset));
   bswapl(reg);
   shrl(reg, 16);
 }
 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache,
                                                            Register index,
                                                            int bcp_offset) {
   assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
   assert(cache != index, "must use different registers");
   load_unsigned_word(index, Address(r13, bcp_offset));
   movq(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
   assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
   // convert from field index to ConstantPoolCacheEntry index
   shll(index, 2);
 }
 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache,
                                                                Register tmp,
                                                                int bcp_offset) {
   assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
   assert(cache != tmp, "must use different register");
   load_unsigned_word(tmp, Address(r13, bcp_offset));
   assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
   // convert from field index to ConstantPoolCacheEntry index
   // and from word offset to byte offset
   shll(tmp, 2 + LogBytesPerWord);
   movq(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
   // skip past the header
   addq(cache, in_bytes(constantPoolCacheOopDesc::base_offset()));
   addq(cache, tmp);  // construct pointer to cache entry
 }
 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
 // subtype of super_klass.
 //
 // Args:
 //      rax: superklass
 //      Rsub_klass: subklass
 //
 // Kills:
 //      rcx, rdi
 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
                                                   Label& ok_is_subtype) {
   assert(Rsub_klass != rax, "rax holds superklass");
   assert(Rsub_klass != r14, "r14 holds locals");
   assert(Rsub_klass != r13, "r13 holds bcp");
   assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
   assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
   Label not_subtype, loop;
   // Profile the not-null value's klass.
   profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, rdi
   // Load the super-klass's check offset into rcx
   movl(rcx, Address(rax, sizeof(oopDesc) +
                     Klass::super_check_offset_offset_in_bytes()));
   // Load from the sub-klass's super-class display list, or a 1-word
   // cache of the secondary superclass list, or a failing value with a
   // sentinel offset if the super-klass is an interface or
   // exceptionally deep in the Java hierarchy and we have to scan the
   // secondary superclass list the hard way.  See if we get an
   // immediate positive hit
   cmpq(rax, Address(Rsub_klass, rcx, Address::times_1));
   jcc(Assembler::equal,ok_is_subtype);
   // Check for immediate negative hit
   cmpl(rcx, sizeof(oopDesc) + Klass::secondary_super_cache_offset_in_bytes());
   jcc( Assembler::notEqual, not_subtype );
   // Check for self
   cmpq(Rsub_klass, rax);
   jcc(Assembler::equal, ok_is_subtype);
   // Now do a linear scan of the secondary super-klass chain.
   movq(rdi, Address(Rsub_klass, sizeof(oopDesc) +
                     Klass::secondary_supers_offset_in_bytes()));
   // rdi holds the objArrayOop of secondary supers.
   // Load the array length
   movl(rcx, Address(rdi, arrayOopDesc::length_offset_in_bytes()));
   // Skip to start of data; also clear Z flag incase rcx is zero
   addq(rdi, arrayOopDesc::base_offset_in_bytes(T_OBJECT));
   // Scan rcx words at [rdi] for occurance of rax
   // Set NZ/Z based on last compare
   // this part is kind tricky, as values in supers array could be 32 or 64 bit wide
   // and we store values in objArrays always encoded, thus we need to encode value
   // before repne
   if (UseCompressedOops) {
     encode_heap_oop(rax);
     repne_scanl();
     // Not equal?
     jcc(Assembler::notEqual, not_subtype);
     // decode heap oop here for movq
     decode_heap_oop(rax);
   } else {
     repne_scanq();
     jcc(Assembler::notEqual, not_subtype);
   }
   // Must be equal but missed in cache.  Update cache.
   movq(Address(Rsub_klass, sizeof(oopDesc) +
                Klass::secondary_super_cache_offset_in_bytes()), rax);
   jmp(ok_is_subtype);
   bind(not_subtype);
   // decode heap oop here for miss
   if (UseCompressedOops) decode_heap_oop(rax);
   profile_typecheck_failed(rcx); // blows rcx
 }
 // Java Expression Stack
 #ifdef ASSERT
 // Verifies that the stack tag matches.  Must be called before the stack
 // value is popped off the stack.
 void InterpreterMacroAssembler::verify_stack_tag(frame::Tag t) {
   if (TaggedStackInterpreter) {
     frame::Tag tag = t;
     if (t == frame::TagCategory2) {
       tag = frame::TagValue;
       Label hokay;
       cmpq(Address(rsp, 3*wordSize), (int)tag);
       jcc(Assembler::equal, hokay);
       stop("Java Expression stack tag high value is bad");
       bind(hokay);
     }
     Label okay;
     cmpq(Address(rsp, wordSize), (int)tag);
     jcc(Assembler::equal, okay);
     // Also compare if the stack value is zero, then the tag might
     // not have been set coming from deopt.
     cmpq(Address(rsp, 0), 0);
     jcc(Assembler::equal, okay);
     stop("Java Expression stack tag value is bad");
     bind(okay);
   }
 }
 #endif // ASSERT
 void InterpreterMacroAssembler::pop_ptr(Register r) {
   debug_only(verify_stack_tag(frame::TagReference));
   popq(r);
   if (TaggedStackInterpreter) addq(rsp, 1 * wordSize);
 }
 void InterpreterMacroAssembler::pop_ptr(Register r, Register tag) {
   popq(r);
   if (TaggedStackInterpreter) popq(tag);
 }
 void InterpreterMacroAssembler::pop_i(Register r) {
   // XXX can't use popq currently, upper half non clean
   debug_only(verify_stack_tag(frame::TagValue));
   movl(r, Address(rsp, 0));
   addq(rsp, wordSize);
   if (TaggedStackInterpreter) addq(rsp, 1 * wordSize);
 }
 void InterpreterMacroAssembler::pop_l(Register r) {
   debug_only(verify_stack_tag(frame::TagCategory2));
   movq(r, Address(rsp, 0));
   addq(rsp, 2 * Interpreter::stackElementSize());
 }
 void InterpreterMacroAssembler::pop_f(XMMRegister r) {
   debug_only(verify_stack_tag(frame::TagValue));
   movflt(r, Address(rsp, 0));
   addq(rsp, wordSize);
   if (TaggedStackInterpreter) addq(rsp, 1 * wordSize);
 }
 void InterpreterMacroAssembler::pop_d(XMMRegister r) {
   debug_only(verify_stack_tag(frame::TagCategory2));
   movdbl(r, Address(rsp, 0));
   addq(rsp, 2 * Interpreter::stackElementSize());
 }
 void InterpreterMacroAssembler::push_ptr(Register r) {
   if (TaggedStackInterpreter) pushq(frame::TagReference);
   pushq(r);
 }
 void InterpreterMacroAssembler::push_ptr(Register r, Register tag) {
   if (TaggedStackInterpreter) pushq(tag);
   pushq(r);
 }
 void InterpreterMacroAssembler::push_i(Register r) {
   if (TaggedStackInterpreter) pushq(frame::TagValue);
   pushq(r);
 }
 void InterpreterMacroAssembler::push_l(Register r) {
   if (TaggedStackInterpreter) {
     pushq(frame::TagValue);
     subq(rsp, 1 * wordSize);
     pushq(frame::TagValue);
     subq(rsp, 1 * wordSize);
   } else {
     subq(rsp, 2 * wordSize);
   }
   movq(Address(rsp, 0), r);
 }
 void InterpreterMacroAssembler::push_f(XMMRegister r) {
   if (TaggedStackInterpreter) pushq(frame::TagValue);
   subq(rsp, wordSize);
   movflt(Address(rsp, 0), r);
 }
 void InterpreterMacroAssembler::push_d(XMMRegister r) {
   if (TaggedStackInterpreter) {
     pushq(frame::TagValue);
     subq(rsp, 1 * wordSize);
     pushq(frame::TagValue);
     subq(rsp, 1 * wordSize);
   } else {
     subq(rsp, 2 * wordSize);
   }
   movdbl(Address(rsp, 0), r);
 }
 void InterpreterMacroAssembler::pop(TosState state) {
   switch (state) {
   case atos: pop_ptr();                 break;
   case btos:
   case ctos:
   case stos:
   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();
   }
   verify_oop(rax, state);
 }
 void InterpreterMacroAssembler::push(TosState state) {
   verify_oop(rax, state);
   switch (state) {
   case atos: push_ptr();                break;
   case btos:
   case ctos:
   case stos:
   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();
   }
 }
 // Tagged stack helpers for swap and dup
 void InterpreterMacroAssembler::load_ptr_and_tag(int n, Register val,
                                                  Register tag) {
   movq(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
   if (TaggedStackInterpreter) {
     movq(tag, Address(rsp, Interpreter::expr_tag_offset_in_bytes(n)));
   }
 }
 void InterpreterMacroAssembler::store_ptr_and_tag(int n, Register val,
                                                   Register tag) {
   movq(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
   if (TaggedStackInterpreter) {
     movq(Address(rsp, Interpreter::expr_tag_offset_in_bytes(n)), tag);
   }
 }
 // Tagged local support
 void InterpreterMacroAssembler::tag_local(frame::Tag tag, int n) {
   if (TaggedStackInterpreter) {
     if (tag == frame::TagCategory2) {
       mov64(Address(r14, Interpreter::local_tag_offset_in_bytes(n+1)),
            (intptr_t)frame::TagValue);
       mov64(Address(r14, Interpreter::local_tag_offset_in_bytes(n)),
            (intptr_t)frame::TagValue);
     } else {
       mov64(Address(r14, Interpreter::local_tag_offset_in_bytes(n)), (intptr_t)tag);
     }
   }
 }
 void InterpreterMacroAssembler::tag_local(frame::Tag tag, Register idx) {
   if (TaggedStackInterpreter) {
     if (tag == frame::TagCategory2) {
       mov64(Address(r14, idx, Address::times_8,
                   Interpreter::local_tag_offset_in_bytes(1)), (intptr_t)frame::TagValue);
       mov64(Address(r14, idx, Address::times_8,
                   Interpreter::local_tag_offset_in_bytes(0)), (intptr_t)frame::TagValue);
     } else {
       mov64(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(0)),
            (intptr_t)tag);
     }
   }
 }
 void InterpreterMacroAssembler::tag_local(Register tag, Register idx) {
   if (TaggedStackInterpreter) {
     // can only be TagValue or TagReference
     movq(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(0)), tag);
   }
 }
 void InterpreterMacroAssembler::tag_local(Register tag, int n) {
   if (TaggedStackInterpreter) {
     // can only be TagValue or TagReference
     movq(Address(r14, Interpreter::local_tag_offset_in_bytes(n)), tag);
   }
 }
 #ifdef ASSERT
 void InterpreterMacroAssembler::verify_local_tag(frame::Tag tag, int n) {
   if (TaggedStackInterpreter) {
      frame::Tag t = tag;
     if (tag == frame::TagCategory2) {
       Label nbl;
       t = frame::TagValue;  // change to what is stored in locals
       cmpq(Address(r14, Interpreter::local_tag_offset_in_bytes(n+1)), (int)t);
       jcc(Assembler::equal, nbl);
       stop("Local tag is bad for long/double");
       bind(nbl);
     }
     Label notBad;
     cmpq(Address(r14, Interpreter::local_tag_offset_in_bytes(n)), (int)t);
     jcc(Assembler::equal, notBad);
     // Also compare if the local value is zero, then the tag might
     // not have been set coming from deopt.
     cmpq(Address(r14, Interpreter::local_offset_in_bytes(n)), 0);
     jcc(Assembler::equal, notBad);
     stop("Local tag is bad");
     bind(notBad);
   }
 }
 void InterpreterMacroAssembler::verify_local_tag(frame::Tag tag, Register idx) {
   if (TaggedStackInterpreter) {
     frame::Tag t = tag;
     if (tag == frame::TagCategory2) {
       Label nbl;
       t = frame::TagValue;  // change to what is stored in locals
       cmpq(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(1)), (int)t);
       jcc(Assembler::equal, nbl);
       stop("Local tag is bad for long/double");
       bind(nbl);
     }
     Label notBad;
     cmpq(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(0)), (int)t);
     jcc(Assembler::equal, notBad);
     // Also compare if the local value is zero, then the tag might
     // not have been set coming from deopt.
     cmpq(Address(r14, idx, Address::times_8, Interpreter::local_offset_in_bytes(0)), 0);
     jcc(Assembler::equal, notBad);
     stop("Local tag is bad");
     bind(notBad);
   }
 }
 #endif // ASSERT
 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point) {
   MacroAssembler::call_VM_leaf_base(entry_point, 0);
 }
 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point,
                                                    Register arg_1) {
   if (c_rarg0 != arg_1) {
     movq(c_rarg0, arg_1);
   }
   MacroAssembler::call_VM_leaf_base(entry_point, 1);
 }
 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point,
                                                    Register arg_1,
                                                    Register arg_2) {
   assert(c_rarg0 != arg_2, "smashed argument");
   assert(c_rarg1 != arg_1, "smashed argument");
   if (c_rarg0 != arg_1) {
     movq(c_rarg0, arg_1);
   }
   if (c_rarg1 != arg_2) {
     movq(c_rarg1, arg_2);
   }
   MacroAssembler::call_VM_leaf_base(entry_point, 2);
 }
 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point,
                                                    Register arg_1,
                                                    Register arg_2,
                                                    Register arg_3) {
   assert(c_rarg0 != arg_2, "smashed argument");
   assert(c_rarg0 != arg_3, "smashed argument");
   assert(c_rarg1 != arg_1, "smashed argument");
   assert(c_rarg1 != arg_3, "smashed argument");
   assert(c_rarg2 != arg_1, "smashed argument");
   assert(c_rarg2 != arg_2, "smashed argument");
   if (c_rarg0 != arg_1) {
     movq(c_rarg0, arg_1);
   }
   if (c_rarg1 != arg_2) {
     movq(c_rarg1, arg_2);
   }
   if (c_rarg2 != arg_3) {
     movq(c_rarg2, arg_3);
   }
   MacroAssembler::call_VM_leaf_base(entry_point, 3);
 }
 // Jump to from_interpreted entry of a call unless single stepping is possible
 // in this thread in which case we must call the i2i entry
 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
   // set sender sp
   leaq(r13, Address(rsp, wordSize));
   // record last_sp
   movq(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), r13);
   if (JvmtiExport::can_post_interpreter_events()) {
     Label run_compiled_code;
     // 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.
     get_thread(temp);
     // interp_only is an int, on little endian it is sufficient to test the byte only
     // Is a cmpl faster (ce
     cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
     jcc(Assembler::zero, run_compiled_code);
     jmp(Address(method, methodOopDesc::interpreter_entry_offset()));
     bind(run_compiled_code);
   }
   jmp(Address(method, methodOopDesc::from_interpreted_offset()));
 }
 // The following two routines provide a hook so that an implementation
 // can schedule the dispatch in two parts.  amd64 does not do this.
 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
   // Nothing amd64 specific to be done here
 }
 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
   dispatch_next(state, step);
 }
 void InterpreterMacroAssembler::dispatch_base(TosState state,
                                               address* table,
                                               bool verifyoop) {
   verify_FPU(1, state);
   if (VerifyActivationFrameSize) {
     Label L;
     movq(rcx, rbp);
     subq(rcx, rsp);
     int min_frame_size =
       (frame::link_offset - frame::interpreter_frame_initial_sp_offset) *
       wordSize;
     cmpq(rcx, min_frame_size);
     jcc(Assembler::greaterEqual, L);
     stop("broken stack frame");
     bind(L);
   }
   if (verifyoop) {
     verify_oop(rax, state);
   }
   lea(rscratch1, ExternalAddress((address)table));
   jmp(Address(rscratch1, rbx, Address::times_8));
 }
 void InterpreterMacroAssembler::dispatch_only(TosState state) {
   dispatch_base(state, Interpreter::dispatch_table(state));
 }
 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
   dispatch_base(state, Interpreter::normal_table(state));
 }
 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
   dispatch_base(state, Interpreter::normal_table(state), false);
 }
 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) {
   // load next bytecode (load before advancing r13 to prevent AGI)
   load_unsigned_byte(rbx, Address(r13, step));
   // advance r13
   incrementq(r13, step);
   dispatch_base(state, Interpreter::dispatch_table(state));
 }
 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
   // load current bytecode
   load_unsigned_byte(rbx, Address(r13, 0));
   dispatch_base(state, table);
 }
 // 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,
         Register ret_addr,
         bool throw_monitor_exception,
         bool install_monitor_exception,
         bool notify_jvmdi) {
   // Note: Registers rdx xmm0 may be in use for the
   // result check if synchronized method
   Label unlocked, unlock, no_unlock;
   // get the value of _do_not_unlock_if_synchronized into rdx
   const Address do_not_unlock_if_synchronized(r15_thread,
     in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
   movbool(rdx, do_not_unlock_if_synchronized);
   movbool(do_not_unlock_if_synchronized, false); // reset the flag
  // get method access flags
   movq(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
   movl(rcx, Address(rbx, methodOopDesc::access_flags_offset()));
   testl(rcx, JVM_ACC_SYNCHRONIZED);
   jcc(Assembler::zero, unlocked);
   // Don't unlock anything if the _do_not_unlock_if_synchronized flag
   // is set.
   testbool(rdx);
   jcc(Assembler::notZero, no_unlock);
   // unlock monitor
   push(state); // save result
   // 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.
   const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
                         wordSize - (int) sizeof(BasicObjectLock));
   // We use c_rarg1 so that if we go slow path it will be the correct
   // register for unlock_object to pass to VM directly
   leaq(c_rarg1, monitor); // address of first monitor
   movq(rax, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()));
   testq(rax, rax);
   jcc(Assembler::notZero, unlock);
   pop(state);
   if (throw_monitor_exception) {
     // Entry already unlocked, need to throw exception
     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) {
       call_VM(noreg, CAST_FROM_FN_PTR(address,
                      InterpreterRuntime::new_illegal_monitor_state_exception));
     }
     jmp(unlocked);
   }
   bind(unlock);
   unlock_object(c_rarg1);
   pop(state);
   // Check that for block-structured locking (i.e., that all locked
   // objects has been unlocked)
   bind(unlocked);
   // rax: Might contain return value
   // Check that all monitors are unlocked
   {
     Label loop, exception, entry, restart;
     const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
     const Address monitor_block_top(
         rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
     const Address monitor_block_bot(
         rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
     bind(restart);
     // We use c_rarg1 so that if we go slow path it will be the correct
     // register for unlock_object to pass to VM directly
     movq(c_rarg1, monitor_block_top); // points to current entry, starting
                                   // with top-most entry
     leaq(rbx, monitor_block_bot); // points to word before bottom of
                                   // monitor block
     jmp(entry);
     // Entry already locked, need to throw exception
     bind(exception);
     if (throw_monitor_exception) {
       // Throw 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 install illegal_monitor_exception.
       // Unlock does not block, so don't have to worry about the frame.
       // We don't have to preserve c_rarg1 since we are going to throw an exception.
       push(state);
       unlock_object(c_rarg1);
       pop(state);
       if (install_monitor_exception) {
         call_VM(noreg, CAST_FROM_FN_PTR(address,
                                         InterpreterRuntime::
                                         new_illegal_monitor_state_exception));
       }
       jmp(restart);
     }
     bind(loop);
     // check if current entry is used
     cmpq(Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()), (int) NULL);
     jcc(Assembler::notEqual, exception);
     addq(c_rarg1, entry_size); // otherwise advance to next entry
     bind(entry);
     cmpq(c_rarg1, rbx); // check if bottom reached
     jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
   }
   bind(no_unlock);
   // jvmti support
   if (notify_jvmdi) {
     notify_method_exit(state, NotifyJVMTI);    // preserve TOSCA
   } else {
     notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
   }
   // remove activation
   // get sender sp
   movq(rbx,
        Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
   leave();                           // remove frame anchor
   popq(ret_addr);                    // get return address
   movq(rsp, rbx);                    // set sp to sender sp
 }
 // Lock object
 //
 // Args:
 //      c_rarg1: BasicObjectLock to be used for locking
 //
 // Kills:
 //      rax
 //      c_rarg0, c_rarg1, c_rarg2, c_rarg3, .. (param regs)
 //      rscratch1, rscratch2 (scratch regs)
 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
   assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1");
   if (UseHeavyMonitors) {
     call_VM(noreg,
             CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
             lock_reg);
   } else {
     Label done;
     const Register swap_reg = rax; // Must use rax for cmpxchg instruction
     const Register obj_reg = c_rarg3; // Will contain the oop
     const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
     const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
     const int mark_offset = lock_offset +
                             BasicLock::displaced_header_offset_in_bytes();
     Label slow_case;
     // Load object pointer into obj_reg %c_rarg3
     movq(obj_reg, Address(lock_reg, obj_offset));
     if (UseBiasedLocking) {
       biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, done, &slow_case);
     }
     // Load immediate 1 into swap_reg %rax
     movl(swap_reg, 1);
     // Load (object->mark() | 1) into swap_reg %rax
     orq(swap_reg, Address(obj_reg, 0));
     // Save (object->mark() | 1) into BasicLock's displaced header
     movq(Address(lock_reg, mark_offset), swap_reg);
     assert(lock_offset == 0,
            "displached header must be first word in BasicObjectLock");
     if (os::is_MP()) lock();
     cmpxchgq(lock_reg, Address(obj_reg, 0));
     if (PrintBiasedLockingStatistics) {
       cond_inc32(Assembler::zero,
                  ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
     }
     jcc(Assembler::zero, done);
     // Test if the oopMark is an obvious stack pointer, i.e.,
     //  1) (mark & 7) == 0, and
     //  2) rsp <= mark < mark + os::pagesize()
     //
     // These 3 tests can be done by evaluating the following
     // expression: ((mark - rsp) & (7 - os::vm_page_size())),
     // assuming both stack pointer and pagesize have their
     // least significant 3 bits clear.
     // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg
     subq(swap_reg, rsp);
     andq(swap_reg, 7 - os::vm_page_size());
     // Save the test result, for recursive case, the result is zero
     movq(Address(lock_reg, mark_offset), swap_reg);
     if (PrintBiasedLockingStatistics) {
       cond_inc32(Assembler::zero,
                  ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
     }
     jcc(Assembler::zero, done);
     bind(slow_case);
     // Call the runtime routine for 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.  Throws an IllegalMonitorException if object is
 // not locked by current thread.
 //
 // Args:
 //      c_rarg1: BasicObjectLock for lock
 //
 // Kills:
 //      rax
 //      c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
 //      rscratch1, rscratch2 (scratch regs)
 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
   assert(lock_reg == c_rarg1, "The argument is only for looks. It must be rarg1");
   if (UseHeavyMonitors) {
     call_VM(noreg,
             CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
             lock_reg);
   } else {
     Label done;
     const Register swap_reg   = rax;  // Must use rax for cmpxchg instruction
     const Register header_reg = c_rarg2;  // Will contain the old oopMark
     const Register obj_reg    = c_rarg3;  // Will contain the oop
     save_bcp(); // Save in case of exception
     // Convert from BasicObjectLock structure to object and BasicLock
     // structure Store the BasicLock address into %rax
     leaq(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
     // Load oop into obj_reg(%c_rarg3)
     movq(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()));
     // Free entry
     movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD);
     if (UseBiasedLocking) {
       biased_locking_exit(obj_reg, header_reg, done);
     }
     // Load the old header from BasicLock structure
     movq(header_reg, Address(swap_reg,
                              BasicLock::displaced_header_offset_in_bytes()));
     // Test for recursion
     testq(header_reg, header_reg);
     // zero for recursive case
     jcc(Assembler::zero, done);
     // Atomic swap back the old header
     if (os::is_MP()) lock();
     cmpxchgq(header_reg, Address(obj_reg, 0));
     // zero for recursive case
     jcc(Assembler::zero, done);
     // Call the runtime routine for slow case.
     movq(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()),
          obj_reg); // restore obj
     call_VM(noreg,
             CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
             lock_reg);
     bind(done);
     restore_bcp();
   }
 }
 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
                                                          Label& zero_continue) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   movq(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize));
   testq(mdp, mdp);
   jcc(Assembler::zero, zero_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;
   pushq(rax);
   pushq(rbx);
   get_method(rbx);
   // Test MDO to avoid the call if it is NULL.
   movq(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
   testq(rax, rax);
   jcc(Assembler::zero, zero_continue);
   // rbx: method
   // r13: bcp
   call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, r13);
   // rax: mdi
   movq(rbx, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
   testq(rbx, rbx);
   jcc(Assembler::zero, zero_continue);
   addq(rbx, in_bytes(methodDataOopDesc::data_offset()));
   addq(rbx, rax);
   movq(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rbx);
   bind(zero_continue);
   popq(rbx);
   popq(rax);
 }
 void InterpreterMacroAssembler::verify_method_data_pointer() {
   assert(ProfileInterpreter, "must be profiling interpreter");
 #ifdef ASSERT
   Label verify_continue;
   pushq(rax);
   pushq(rbx);
   pushq(c_rarg3);
   pushq(c_rarg2);
   test_method_data_pointer(c_rarg3, verify_continue); // If mdp is zero, continue
   get_method(rbx);
   // If the mdp is valid, it will point to a DataLayout header which is
   // consistent with the bcp.  The converse is highly probable also.
   load_unsigned_word(c_rarg2,
                      Address(c_rarg3, in_bytes(DataLayout::bci_offset())));
   addq(c_rarg2, Address(rbx, methodOopDesc::const_offset()));
   leaq(c_rarg2, Address(c_rarg2, constMethodOopDesc::codes_offset()));
   cmpq(c_rarg2, r13);
   jcc(Assembler::equal, verify_continue);
   // rbx: method
   // r13: bcp
   // c_rarg3: mdp
   call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp),
                rbx, r13, c_rarg3);
   bind(verify_continue);
   popq(c_rarg2);
   popq(c_rarg3);
   popq(rbx);
   popq(rax);
 #endif // ASSERT
 }
 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
                                                 int constant,
                                                 Register value) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   Address data(mdp_in, constant);
   movq(data, value);
 }
 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
                                                       int constant,
                                                       bool decrement) {
   // Counter address
   Address data(mdp_in, constant);
   increment_mdp_data_at(data, decrement);
 }
 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
                                                       bool decrement) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   if (decrement) {
     // Decrement the register.  Set condition codes.
     addq(data, -DataLayout::counter_increment);
     // If the decrement causes the counter to overflow, stay negative
     Label L;
     jcc(Assembler::negative, L);
     addq(data, DataLayout::counter_increment);
     bind(L);
   } else {
     assert(DataLayout::counter_increment == 1,
            "flow-free idiom only works with 1");
     // Increment the register.  Set carry flag.
     addq(data, DataLayout::counter_increment);
     // If the increment causes the counter to overflow, pull back by 1.
     sbbq(data, 0);
   }
 }
 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
                                                       Register reg,
                                                       int constant,
                                                       bool decrement) {
   Address data(mdp_in, reg, Address::times_1, constant);
   increment_mdp_data_at(data, decrement);
 }
 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
                                                 int flag_byte_constant) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   int header_offset = in_bytes(DataLayout::header_offset());
   int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
   // Set the flag
   orl(Address(mdp_in, header_offset), header_bits);
 }
 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
                                                  int offset,
                                                  Register value,
                                                  Register test_value_out,
                                                  Label& not_equal_continue) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   if (test_value_out == noreg) {
     cmpq(value, Address(mdp_in, offset));
   } else {
     // Put the test value into a register, so caller can use it:
     movq(test_value_out, Address(mdp_in, offset));
     cmpq(test_value_out, value);
   }
   jcc(Assembler::notEqual, not_equal_continue);
 }
 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
                                                      int offset_of_disp) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   Address disp_address(mdp_in, offset_of_disp);
   addq(mdp_in, disp_address);
   movq(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
 }
 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
                                                      Register reg,
                                                      int offset_of_disp) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
   addq(mdp_in, disp_address);
   movq(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
 }
 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
                                                        int constant) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   addq(mdp_in, constant);
   movq(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
 }
 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   pushq(return_bci); // save/restore across call_VM
   call_VM(noreg,
           CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
           return_bci);
   popq(return_bci);
 }
 void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
                                                      Register bumped_count) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     // Otherwise, assign to mdp
     test_method_data_pointer(mdp, profile_continue);
     // We are taking a branch.  Increment the taken count.
     // We inline increment_mdp_data_at to return bumped_count in a register
     //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
     Address data(mdp, in_bytes(JumpData::taken_offset()));
     movq(bumped_count, data);
     assert(DataLayout::counter_increment == 1,
             "flow-free idiom only works with 1");
     addq(bumped_count, DataLayout::counter_increment);
     sbbq(bumped_count, 0);
     movq(data, bumped_count); // Store back out
     // The method data pointer needs to be updated to reflect the new target.
     update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // We are taking a branch.  Increment the not taken count.
     increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
     // The method data pointer needs to be updated to correspond to
     // the next bytecode
     update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_call(Register mdp) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // We are making a call.  Increment the count.
     increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
     // The method data pointer needs to be updated to reflect the new target.
     update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // We are making a call.  Increment the count.
     increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
     // The method data pointer needs to be updated to reflect the new target.
     update_mdp_by_constant(mdp,
                            in_bytes(VirtualCallData::
                                     virtual_call_data_size()));
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
                                                      Register mdp,
                                                      Register reg2) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // We are making a call.  Increment the count.
     increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
     // Record the receiver type.
     record_klass_in_profile(receiver, mdp, reg2);
     // The method data pointer needs to be updated to reflect the new target.
     update_mdp_by_constant(mdp,
                            in_bytes(VirtualCallData::
                                     virtual_call_data_size()));
     bind(profile_continue);
   }
 }
 // This routine creates a state machine for updating the multi-row
 // type profile at a virtual call site (or other type-sensitive bytecode).
 // The machine visits each row (of receiver/count) until the receiver type
 // is found, or until it runs out of rows.  At the same time, it remembers
 // the location of the first empty row.  (An empty row records null for its
 // receiver, and can be allocated for a newly-observed receiver type.)
 // Because there are two degrees of freedom in the state, a simple linear
 // search will not work; it must be a decision tree.  Hence this helper
 // function is recursive, to generate the required tree structured code.
 // It's the interpreter, so we are trading off code space for speed.
 // See below for example code.
 void InterpreterMacroAssembler::record_klass_in_profile_helper(
                                         Register receiver, Register mdp,
                                         Register reg2,
                                         int start_row, Label& done) {
   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(mdp, recvr_offset, receiver,
                      (test_for_null_also ? reg2 : noreg),
                      next_test);
     // (Reg2 now contains the receiver from the CallData.)
     // The receiver is receiver[n].  Increment count[n].
     int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row));
     increment_mdp_data_at(mdp, count_offset);
     jmp(done);
     bind(next_test);
     if (test_for_null_also) {
       // Failed the equality check on receiver[n]...  Test for null.
       testq(reg2, reg2);
       if (start_row == last_row) {
         // The only thing left to do is handle the null case.
         jcc(Assembler::notZero, done);
         break;
       }
       // Since null is rare, make it be the branch-taken case.
       Label found_null;
       jcc(Assembler::zero, found_null);
       // Put all the "Case 3" tests here.
       record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done);
       // 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(mdp, recvr_offset, receiver);
   int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row));
   movl(reg2, DataLayout::counter_increment);
   set_mdp_data_at(mdp, count_offset, reg2);
   jmp(done);
 }
 // Example state machine code for three profile rows:
 //   // main copy of decision tree, rooted at row[1]
 //   if (row[0].rec == rec) { row[0].incr(); goto done; }
 //   if (row[0].rec != NULL) {
 //     // inner copy of decision tree, rooted at row[1]
 //     if (row[1].rec == rec) { row[1].incr(); goto done; }
 //     if (row[1].rec != NULL) {
 //       // degenerate decision tree, rooted at row[2]
 //       if (row[2].rec == rec) { row[2].incr(); goto done; }
 //       if (row[2].rec != NULL) { goto done; } // overflow
 //       row[2].init(rec); goto done;
 //     } else {
 //       // remember row[1] is empty
 //       if (row[2].rec == rec) { row[2].incr(); goto done; }
 //       row[1].init(rec); goto done;
 //     }
 //   } else {
 //     // remember row[0] is empty
 //     if (row[1].rec == rec) { row[1].incr(); goto done; }
 //     if (row[2].rec == rec) { row[2].incr(); goto done; }
 //     row[0].init(rec); goto done;
 //   }
 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
                                                         Register mdp,
                                                         Register reg2) {
   assert(ProfileInterpreter, "must be profiling");
   Label done;
   record_klass_in_profile_helper(receiver, mdp, reg2, 0, done);
   bind (done);
 }
 void InterpreterMacroAssembler::profile_ret(Register return_bci,
                                             Register mdp) {
   if (ProfileInterpreter) {
     Label profile_continue;
     uint row;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // Update the total ret count.
     increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
     for (row = 0; row < RetData::row_limit(); row++) {
       Label next_test;
       // See if return_bci is equal to bci[n]:
       test_mdp_data_at(mdp,
                        in_bytes(RetData::bci_offset(row)),
                        return_bci, noreg,
                        next_test);
       // return_bci is equal to bci[n].  Increment the count.
       increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
       // The method data pointer needs to be updated to reflect the new target.
       update_mdp_by_offset(mdp,
                            in_bytes(RetData::bci_displacement_offset(row)));
       jmp(profile_continue);
       bind(next_test);
     }
     update_mdp_for_ret(return_bci);
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // 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, mdp_delta);
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
   if (ProfileInterpreter && TypeProfileCasts) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, 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(mdp, count_offset, true);
     bind (profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // 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());
       // Record the object type.
       record_klass_in_profile(klass, mdp, reg2);
     }
     update_mdp_by_constant(mdp, mdp_delta);
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // Update the default case count
     increment_mdp_data_at(mdp,
                           in_bytes(MultiBranchData::default_count_offset()));
     // The method data pointer needs to be updated.
     update_mdp_by_offset(mdp,
                          in_bytes(MultiBranchData::
                                   default_displacement_offset()));
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_switch_case(Register index,
                                                     Register mdp,
                                                     Register reg2) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // Build the base (index * per_case_size_in_bytes()) +
     // case_array_offset_in_bytes()
     movl(reg2, in_bytes(MultiBranchData::per_case_size()));
     imulq(index, reg2); // XXX l ?
     addq(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
     // Update the case count
     increment_mdp_data_at(mdp,
                           index,
                           in_bytes(MultiBranchData::relative_count_offset()));
     // The method data pointer needs to be updated.
     update_mdp_by_offset(mdp,
                          index,
                          in_bytes(MultiBranchData::
                                   relative_displacement_offset()));
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
   if (state == atos) {
     MacroAssembler::verify_oop(reg);
   }
 }
 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
 }
 void InterpreterMacroAssembler::notify_method_entry() {
   // Whenever JVMTI is interp_only_mode, method entry/exit events are sent 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;
     movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset()));
     testl(rdx, rdx);
     jcc(Assembler::zero, L);
     call_VM(noreg, CAST_FROM_FN_PTR(address,
                                     InterpreterRuntime::post_method_entry));
     bind(L);
   }
   {
     SkipIfEqual skip(this, &DTraceMethodProbes, false);
     get_method(c_rarg1);
     call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
                  r15_thread, c_rarg1);
   }
 }
 void InterpreterMacroAssembler::notify_method_exit(
     TosState state, NotifyMethodExitMode mode) {
   // Whenever JVMTI is interp_only_mode, method entry/exit events are sent 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;
     // Note: frame::interpreter_frame_result has a dependency on how the
     // method result is saved across the call to post_method_exit. If this
     // is changed then the interpreter_frame_result implementation will
     // need to be updated too.
     push(state);
     movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset()));
     testl(rdx, rdx);
     jcc(Assembler::zero, L);
     call_VM(noreg,
             CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
     bind(L);
     pop(state);
   }
   {
     SkipIfEqual skip(this, &DTraceMethodProbes, false);
     push(state);
     get_method(c_rarg1);
     call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
                  r15_thread, c_rarg1);
     pop(state);
   }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/x86/vm/interp_masm_x86_64.cpp@37f87013dfd8 (annotated)

src/cpu/x86/vm/interp_masm_x86_64.cpp