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

src/cpu/sparc/vm/methodHandles_sparc.cpp@d55217dc206f (annotated)

src/cpu/sparc/vm/methodHandles_sparc.cpp

Mon, 11 Oct 2010 04:18:58 -0700

author: twisti
date: Mon, 11 Oct 2010 04:18:58 -0700
changeset 2201: d55217dc206f
parent 1934: e9ff18c4ace7
child 2204: 5beba6174298
permissions: -rw-r--r--

6829194: JSR 292 needs to support compressed oops
Reviewed-by: kvn, jrose

 /*
  * Copyright (c) 2008, 2010, 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 "incls/_precompiled.incl"
 #include "incls/_methodHandles_sparc.cpp.incl"
 #define __ _masm->
 address MethodHandleEntry::start_compiled_entry(MacroAssembler* _masm,
                                                 address interpreted_entry) {
   // Just before the actual machine code entry point, allocate space
   // for a MethodHandleEntry::Data record, so that we can manage everything
   // from one base pointer.
   __ align(wordSize);
   address target = __ pc() + sizeof(Data);
   while (__ pc() < target) {
     __ nop();
     __ align(wordSize);
   }
   MethodHandleEntry* me = (MethodHandleEntry*) __ pc();
   me->set_end_address(__ pc());         // set a temporary end_address
   me->set_from_interpreted_entry(interpreted_entry);
   me->set_type_checking_entry(NULL);
   return (address) me;
 }
 MethodHandleEntry* MethodHandleEntry::finish_compiled_entry(MacroAssembler* _masm,
                                                 address start_addr) {
   MethodHandleEntry* me = (MethodHandleEntry*) start_addr;
   assert(me->end_address() == start_addr, "valid ME");
   // Fill in the real end_address:
   __ align(wordSize);
   me->set_end_address(__ pc());
   return me;
 }
 // Code generation
 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm) {
   // I5_savedSP: sender SP (must preserve)
   // G4 (Gargs): incoming argument list (must preserve)
   // G5_method:  invoke methodOop; becomes method type.
   // G3_method_handle: receiver method handle (must load from sp[MethodTypeForm.vmslots])
   // O0, O1: garbage temps, blown away
   Register O0_argslot = O0;
   Register O1_scratch = O1;
   // emit WrongMethodType path first, to enable back-branch from main path
   Label wrong_method_type;
   __ bind(wrong_method_type);
   __ jump_to(AddressLiteral(Interpreter::throw_WrongMethodType_entry()), O1_scratch);
   __ delayed()->nop();
   // here's where control starts out:
   __ align(CodeEntryAlignment);
   address entry_point = __ pc();
   // fetch the MethodType from the method handle into G5_method_type
   {
     Register tem = G5_method;
     assert(tem == G5_method_type, "yes, it's the same register");
     for (jint* pchase = methodOopDesc::method_type_offsets_chain(); (*pchase) != -1; pchase++) {
       __ ld_ptr(Address(tem, *pchase), G5_method_type);
     }
   }
   // given the MethodType, find out where the MH argument is buried
   __ load_heap_oop(Address(G5_method_type, __ delayed_value(java_dyn_MethodType::form_offset_in_bytes, O1_scratch)),        O0_argslot);
   __ ldsw(         Address(O0_argslot,     __ delayed_value(java_dyn_MethodTypeForm::vmslots_offset_in_bytes, O1_scratch)), O0_argslot);
   __ ld_ptr(__ argument_address(O0_argslot), G3_method_handle);
   __ check_method_handle_type(G5_method_type, G3_method_handle, O1_scratch, wrong_method_type);
   __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
   return entry_point;
 }
 #ifdef ASSERT
 static void verify_argslot(MacroAssembler* _masm, Register argslot_reg, Register temp_reg, const char* error_message) {
   // Verify that argslot lies within (Gargs, FP].
   Label L_ok, L_bad;
 #ifdef _LP64
   __ add(FP, STACK_BIAS, temp_reg);
   __ cmp(argslot_reg, temp_reg);
 #else
   __ cmp(argslot_reg, FP);
 #endif
   __ brx(Assembler::greaterUnsigned, false, Assembler::pn, L_bad);
   __ delayed()->nop();
   __ cmp(Gargs, argslot_reg);
   __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, L_ok);
   __ delayed()->nop();
   __ bind(L_bad);
   __ stop(error_message);
   __ bind(L_ok);
 }
 #endif
 // Helper to insert argument slots into the stack.
 // arg_slots must be a multiple of stack_move_unit() and <= 0
 void MethodHandles::insert_arg_slots(MacroAssembler* _masm,
                                      RegisterOrConstant arg_slots,
                                      int arg_mask,
                                      Register argslot_reg,
                                      Register temp_reg, Register temp2_reg, Register temp3_reg) {
   assert(temp3_reg != noreg, "temp3 required");
   assert_different_registers(argslot_reg, temp_reg, temp2_reg, temp3_reg,
                              (!arg_slots.is_register() ? Gargs : arg_slots.as_register()));
 #ifdef ASSERT
   verify_argslot(_masm, argslot_reg, temp_reg, "insertion point must fall within current frame");
   if (arg_slots.is_register()) {
     Label L_ok, L_bad;
     __ cmp(arg_slots.as_register(), (int32_t) NULL_WORD);
     __ br(Assembler::greater, false, Assembler::pn, L_bad);
     __ delayed()->nop();
     __ btst(-stack_move_unit() - 1, arg_slots.as_register());
     __ br(Assembler::zero, false, Assembler::pt, L_ok);
     __ delayed()->nop();
     __ bind(L_bad);
     __ stop("assert arg_slots <= 0 and clear low bits");
     __ bind(L_ok);
   } else {
     assert(arg_slots.as_constant() <= 0, "");
     assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
   }
 #endif // ASSERT
 #ifdef _LP64
   if (arg_slots.is_register()) {
     // Was arg_slots register loaded as signed int?
     Label L_ok;
     __ sll(arg_slots.as_register(), BitsPerInt, temp_reg);
     __ sra(temp_reg, BitsPerInt, temp_reg);
     __ cmp(arg_slots.as_register(), temp_reg);
     __ br(Assembler::equal, false, Assembler::pt, L_ok);
     __ delayed()->nop();
     __ stop("arg_slots register not loaded as signed int");
     __ bind(L_ok);
   }
 #endif
   // Make space on the stack for the inserted argument(s).
   // Then pull down everything shallower than argslot_reg.
   // The stacked return address gets pulled down with everything else.
   // That is, copy [sp, argslot) downward by -size words.  In pseudo-code:
   //   sp -= size;
   //   for (temp = sp + size; temp < argslot; temp++)
   //     temp[-size] = temp[0]
   //   argslot -= size;
   RegisterOrConstant offset = __ regcon_sll_ptr(arg_slots, LogBytesPerWord, temp3_reg);
   // Keep the stack pointer 2*wordSize aligned.
   const int TwoWordAlignmentMask = right_n_bits(LogBytesPerWord + 1);
   RegisterOrConstant masked_offset = __ regcon_andn_ptr(offset, TwoWordAlignmentMask, temp_reg);
   __ add(SP, masked_offset, SP);
   __ mov(Gargs, temp_reg);  // source pointer for copy
   __ add(Gargs, offset, Gargs);
   {
     Label loop;
     __ bind(loop);
     // pull one word down each time through the loop
     __ ld_ptr(Address(temp_reg, 0), temp2_reg);
     __ st_ptr(temp2_reg, Address(temp_reg, offset));
     __ add(temp_reg, wordSize, temp_reg);
     __ cmp(temp_reg, argslot_reg);
     __ brx(Assembler::less, false, Assembler::pt, loop);
     __ delayed()->nop();  // FILLME
   }
   // Now move the argslot down, to point to the opened-up space.
   __ add(argslot_reg, offset, argslot_reg);
 }
 // Helper to remove argument slots from the stack.
 // arg_slots must be a multiple of stack_move_unit() and >= 0
 void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
                                      RegisterOrConstant arg_slots,
                                      Register argslot_reg,
                                      Register temp_reg, Register temp2_reg, Register temp3_reg) {
   assert(temp3_reg != noreg, "temp3 required");
   assert_different_registers(argslot_reg, temp_reg, temp2_reg, temp3_reg,
                              (!arg_slots.is_register() ? Gargs : arg_slots.as_register()));
   RegisterOrConstant offset = __ regcon_sll_ptr(arg_slots, LogBytesPerWord, temp3_reg);
 #ifdef ASSERT
   // Verify that [argslot..argslot+size) lies within (Gargs, FP).
   __ add(argslot_reg, offset, temp2_reg);
   verify_argslot(_masm, temp2_reg, temp_reg, "deleted argument(s) must fall within current frame");
   if (arg_slots.is_register()) {
     Label L_ok, L_bad;
     __ cmp(arg_slots.as_register(), (int32_t) NULL_WORD);
     __ br(Assembler::less, false, Assembler::pn, L_bad);
     __ delayed()->nop();
     __ btst(-stack_move_unit() - 1, arg_slots.as_register());
     __ br(Assembler::zero, false, Assembler::pt, L_ok);
     __ delayed()->nop();
     __ bind(L_bad);
     __ stop("assert arg_slots >= 0 and clear low bits");
     __ bind(L_ok);
   } else {
     assert(arg_slots.as_constant() >= 0, "");
     assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
   }
 #endif // ASSERT
   // Pull up everything shallower than argslot.
   // Then remove the excess space on the stack.
   // The stacked return address gets pulled up with everything else.
   // That is, copy [sp, argslot) upward by size words.  In pseudo-code:
   //   for (temp = argslot-1; temp >= sp; --temp)
   //     temp[size] = temp[0]
   //   argslot += size;
   //   sp += size;
   __ sub(argslot_reg, wordSize, temp_reg);  // source pointer for copy
   {
     Label loop;
     __ bind(loop);
     // pull one word up each time through the loop
     __ ld_ptr(Address(temp_reg, 0), temp2_reg);
     __ st_ptr(temp2_reg, Address(temp_reg, offset));
     __ sub(temp_reg, wordSize, temp_reg);
     __ cmp(temp_reg, Gargs);
     __ brx(Assembler::greaterEqual, false, Assembler::pt, loop);
     __ delayed()->nop();  // FILLME
   }
   // Now move the argslot up, to point to the just-copied block.
   __ add(Gargs, offset, Gargs);
   // And adjust the argslot address to point at the deletion point.
   __ add(argslot_reg, offset, argslot_reg);
   // Keep the stack pointer 2*wordSize aligned.
   const int TwoWordAlignmentMask = right_n_bits(LogBytesPerWord + 1);
   RegisterOrConstant masked_offset = __ regcon_andn_ptr(offset, TwoWordAlignmentMask, temp_reg);
   __ add(SP, masked_offset, SP);
 }
 #ifndef PRODUCT
 extern "C" void print_method_handle(oop mh);
 void trace_method_handle_stub(const char* adaptername,
                               oop mh) {
 #if 0
                               intptr_t* entry_sp,
                               intptr_t* saved_sp,
                               intptr_t* saved_bp) {
   // called as a leaf from native code: do not block the JVM!
   intptr_t* last_sp = (intptr_t*) saved_bp[frame::interpreter_frame_last_sp_offset];
   intptr_t* base_sp = (intptr_t*) saved_bp[frame::interpreter_frame_monitor_block_top_offset];
   printf("MH %s mh="INTPTR_FORMAT" sp=("INTPTR_FORMAT"+"INTX_FORMAT") stack_size="INTX_FORMAT" bp="INTPTR_FORMAT"\n",
          adaptername, (intptr_t)mh, (intptr_t)entry_sp, (intptr_t)(saved_sp - entry_sp), (intptr_t)(base_sp - last_sp), (intptr_t)saved_bp);
   if (last_sp != saved_sp)
     printf("*** last_sp="INTPTR_FORMAT"\n", (intptr_t)last_sp);
 #endif
   printf("MH %s mh="INTPTR_FORMAT"\n", adaptername, (intptr_t) mh);
   print_method_handle(mh);
 }
 #endif // PRODUCT
 // which conversion op types are implemented here?
 int MethodHandles::adapter_conversion_ops_supported_mask() {
   return ((1<<sun_dyn_AdapterMethodHandle::OP_RETYPE_ONLY)
          |(1<<sun_dyn_AdapterMethodHandle::OP_RETYPE_RAW)
          |(1<<sun_dyn_AdapterMethodHandle::OP_CHECK_CAST)
          |(1<<sun_dyn_AdapterMethodHandle::OP_PRIM_TO_PRIM)
          |(1<<sun_dyn_AdapterMethodHandle::OP_REF_TO_PRIM)
          |(1<<sun_dyn_AdapterMethodHandle::OP_SWAP_ARGS)
          |(1<<sun_dyn_AdapterMethodHandle::OP_ROT_ARGS)
          |(1<<sun_dyn_AdapterMethodHandle::OP_DUP_ARGS)
          |(1<<sun_dyn_AdapterMethodHandle::OP_DROP_ARGS)
          //|(1<<sun_dyn_AdapterMethodHandle::OP_SPREAD_ARGS) //BUG!
          );
   // FIXME: MethodHandlesTest gets a crash if we enable OP_SPREAD_ARGS.
 }
 //------------------------------------------------------------------------------
 // MethodHandles::generate_method_handle_stub
 //
 // Generate an "entry" field for a method handle.
 // This determines how the method handle will respond to calls.
 void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
   // Here is the register state during an interpreted call,
   // as set up by generate_method_handle_interpreter_entry():
   // - G5: garbage temp (was MethodHandle.invoke methodOop, unused)
   // - G3: receiver method handle
   // - O5_savedSP: sender SP (must preserve)
   Register O0_argslot = O0;
   Register O1_scratch = O1;
   Register O2_scratch = O2;
   Register O3_scratch = O3;
   Register G5_index   = G5;
   guarantee(java_dyn_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
   // Some handy addresses:
   Address G5_method_fie(    G5_method,        in_bytes(methodOopDesc::from_interpreted_offset()));
   Address G3_mh_vmtarget(   G3_method_handle, java_dyn_MethodHandle::vmtarget_offset_in_bytes());
   Address G3_dmh_vmindex(   G3_method_handle, sun_dyn_DirectMethodHandle::vmindex_offset_in_bytes());
   Address G3_bmh_vmargslot( G3_method_handle, sun_dyn_BoundMethodHandle::vmargslot_offset_in_bytes());
   Address G3_bmh_argument(  G3_method_handle, sun_dyn_BoundMethodHandle::argument_offset_in_bytes());
   Address G3_amh_vmargslot( G3_method_handle, sun_dyn_AdapterMethodHandle::vmargslot_offset_in_bytes());
   Address G3_amh_argument ( G3_method_handle, sun_dyn_AdapterMethodHandle::argument_offset_in_bytes());
   Address G3_amh_conversion(G3_method_handle, sun_dyn_AdapterMethodHandle::conversion_offset_in_bytes());
   const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
   if (have_entry(ek)) {
     __ nop();  // empty stubs make SG sick
     return;
   }
   address interp_entry = __ pc();
 #ifndef PRODUCT
   if (TraceMethodHandles) {
     // save: Gargs, O5_savedSP
     __ save(SP, -16*wordSize, SP);
     __ set((intptr_t) entry_name(ek), O0);
     __ mov(G3_method_handle, O1);
     __ call_VM_leaf(Lscratch, CAST_FROM_FN_PTR(address, trace_method_handle_stub));
     __ restore(SP, 16*wordSize, SP);
   }
 #endif // PRODUCT
   switch ((int) ek) {
   case _raise_exception:
     {
       // Not a real MH entry, but rather shared code for raising an
       // exception.  Extra local arguments are passed in scratch
       // registers, as required type in O3, failing object (or NULL)
       // in O2, failing bytecode type in O1.
       __ mov(O5_savedSP, SP);  // Cut the stack back to where the caller started.
       // Push arguments as if coming from the interpreter.
       Register O0_scratch = O0_argslot;
       int stackElementSize = Interpreter::stackElementSize;
       // Make space on the stack for the arguments and set Gargs
       // correctly.
       __ sub(SP, 4*stackElementSize, SP);  // Keep stack aligned.
       __ add(SP, (frame::varargs_offset)*wordSize - 1*Interpreter::stackElementSize + STACK_BIAS + BytesPerWord, Gargs);
       // void raiseException(int code, Object actual, Object required)
       __ st(    O1_scratch, Address(Gargs, 2*stackElementSize));  // code
       __ st_ptr(O2_scratch, Address(Gargs, 1*stackElementSize));  // actual
       __ st_ptr(O3_scratch, Address(Gargs, 0*stackElementSize));  // required
       Label no_method;
       // FIXME: fill in _raise_exception_method with a suitable sun.dyn method
       __ set(AddressLiteral((address) &_raise_exception_method), G5_method);
       __ ld_ptr(Address(G5_method, 0), G5_method);
       __ tst(G5_method);
       __ brx(Assembler::zero, false, Assembler::pn, no_method);
       __ delayed()->nop();
       int jobject_oop_offset = 0;
       __ ld_ptr(Address(G5_method, jobject_oop_offset), G5_method);
       __ tst(G5_method);
       __ brx(Assembler::zero, false, Assembler::pn, no_method);
       __ delayed()->nop();
       __ verify_oop(G5_method);
       __ jump_indirect_to(G5_method_fie, O1_scratch);
       __ delayed()->nop();
       // If we get here, the Java runtime did not do its job of creating the exception.
       // Do something that is at least causes a valid throw from the interpreter.
       __ bind(no_method);
       __ unimplemented("_raise_exception no method");
     }
     break;
   case _invokestatic_mh:
   case _invokespecial_mh:
     {
       __ load_heap_oop(G3_mh_vmtarget, G5_method);  // target is a methodOop
       __ verify_oop(G5_method);
       // Same as TemplateTable::invokestatic or invokespecial,
       // minus the CP setup and profiling:
       if (ek == _invokespecial_mh) {
         // Must load & check the first argument before entering the target method.
         __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
         __ ld_ptr(__ argument_address(O0_argslot), G3_method_handle);
         __ null_check(G3_method_handle);
         __ verify_oop(G3_method_handle);
       }
       __ jump_indirect_to(G5_method_fie, O1_scratch);
       __ delayed()->nop();
     }
     break;
   case _invokevirtual_mh:
     {
       // Same as TemplateTable::invokevirtual,
       // minus the CP setup and profiling:
       // Pick out the vtable index and receiver offset from the MH,
       // and then we can discard it:
       __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
       __ ldsw(G3_dmh_vmindex, G5_index);
       // Note:  The verifier allows us to ignore G3_mh_vmtarget.
       __ ld_ptr(__ argument_address(O0_argslot, -1), G3_method_handle);
       __ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
       // Get receiver klass:
       Register O0_klass = O0_argslot;
       __ load_klass(G3_method_handle, O0_klass);
       __ verify_oop(O0_klass);
       // Get target methodOop & entry point:
       const int base = instanceKlass::vtable_start_offset() * wordSize;
       assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
       __ sll_ptr(G5_index, LogBytesPerWord, G5_index);
       __ add(O0_klass, G5_index, O0_klass);
       Address vtable_entry_addr(O0_klass, base + vtableEntry::method_offset_in_bytes());
       __ ld_ptr(vtable_entry_addr, G5_method);
       __ verify_oop(G5_method);
       __ jump_indirect_to(G5_method_fie, O1_scratch);
       __ delayed()->nop();
     }
     break;
   case _invokeinterface_mh:
     {
       // Same as TemplateTable::invokeinterface,
       // minus the CP setup and profiling:
       __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
       Register O1_intf  = O1_scratch;
       __ load_heap_oop(G3_mh_vmtarget, O1_intf);
       __ ldsw(G3_dmh_vmindex, G5_index);
       __ ld_ptr(__ argument_address(O0_argslot, -1), G3_method_handle);
       __ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
       // Get receiver klass:
       Register O0_klass = O0_argslot;
       __ load_klass(G3_method_handle, O0_klass);
       __ verify_oop(O0_klass);
       // Get interface:
       Label no_such_interface;
       __ verify_oop(O1_intf);
       __ lookup_interface_method(O0_klass, O1_intf,
                                  // Note: next two args must be the same:
                                  G5_index, G5_method,
                                  O2_scratch,
                                  O3_scratch,
                                  no_such_interface);
       __ verify_oop(G5_method);
       __ jump_indirect_to(G5_method_fie, O1_scratch);
       __ delayed()->nop();
       __ bind(no_such_interface);
       // Throw an exception.
       // For historical reasons, it will be IncompatibleClassChangeError.
       __ unimplemented("not tested yet");
       __ ld_ptr(Address(O1_intf, java_mirror_offset), O3_scratch);  // required interface
       __ mov(O0_klass, O2_scratch);  // bad receiver
       __ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O0_argslot);
       __ delayed()->mov(Bytecodes::_invokeinterface, O1_scratch);  // who is complaining?
     }
     break;
   case _bound_ref_mh:
   case _bound_int_mh:
   case _bound_long_mh:
   case _bound_ref_direct_mh:
   case _bound_int_direct_mh:
   case _bound_long_direct_mh:
     {
       const bool direct_to_method = (ek >= _bound_ref_direct_mh);
       BasicType arg_type  = T_ILLEGAL;
       int       arg_mask  = _INSERT_NO_MASK;
       int       arg_slots = -1;
       get_ek_bound_mh_info(ek, arg_type, arg_mask, arg_slots);
       // Make room for the new argument:
       __ ldsw(G3_bmh_vmargslot, O0_argslot);
       __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
       insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask, O0_argslot, O1_scratch, O2_scratch, G5_index);
       // Store bound argument into the new stack slot:
       __ load_heap_oop(G3_bmh_argument, O1_scratch);
       if (arg_type == T_OBJECT) {
         __ st_ptr(O1_scratch, Address(O0_argslot, 0));
       } else {
         Address prim_value_addr(O1_scratch, java_lang_boxing_object::value_offset_in_bytes(arg_type));
         __ load_sized_value(prim_value_addr, O2_scratch, type2aelembytes(arg_type), is_signed_subword_type(arg_type));
         if (arg_slots == 2) {
           __ unimplemented("not yet tested");
 #ifndef _LP64
           __ signx(O2_scratch, O3_scratch);  // Sign extend
 #endif
           __ st_long(O2_scratch, Address(O0_argslot, 0));  // Uses O2/O3 on !_LP64
         } else {
           __ st_ptr( O2_scratch, Address(O0_argslot, 0));
         }
       }
       if (direct_to_method) {
         __ load_heap_oop(G3_mh_vmtarget, G5_method);  // target is a methodOop
         __ verify_oop(G5_method);
         __ jump_indirect_to(G5_method_fie, O1_scratch);
         __ delayed()->nop();
       } else {
         __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);  // target is a methodOop
         __ verify_oop(G3_method_handle);
         __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
       }
     }
     break;
   case _adapter_retype_only:
   case _adapter_retype_raw:
     // Immediately jump to the next MH layer:
     __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
     __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
     // This is OK when all parameter types widen.
     // It is also OK when a return type narrows.
     break;
   case _adapter_check_cast:
     {
       // Temps:
       Register G5_klass = G5_index;  // Interesting AMH data.
       // Check a reference argument before jumping to the next layer of MH:
       __ ldsw(G3_amh_vmargslot, O0_argslot);
       Address vmarg = __ argument_address(O0_argslot);
       // What class are we casting to?
       __ load_heap_oop(G3_amh_argument, G5_klass);  // This is a Class object!
       __ load_heap_oop(Address(G5_klass, java_lang_Class::klass_offset_in_bytes()), G5_klass);
       Label done;
       __ ld_ptr(vmarg, O1_scratch);
       __ tst(O1_scratch);
       __ brx(Assembler::zero, false, Assembler::pn, done);  // No cast if null.
       __ delayed()->nop();
       __ load_klass(O1_scratch, O1_scratch);
       // Live at this point:
       // - G5_klass        :  klass required by the target method
       // - O1_scratch      :  argument klass to test
       // - G3_method_handle:  adapter method handle
       __ check_klass_subtype(O1_scratch, G5_klass, O0_argslot, O2_scratch, done);
       // If we get here, the type check failed!
       __ ldsw(G3_amh_vmargslot, O0_argslot);  // reload argslot field
       __ load_heap_oop(G3_amh_argument, O3_scratch);  // required class
       __ ld_ptr(vmarg, O2_scratch);  // bad object
       __ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O0_argslot);
       __ delayed()->mov(Bytecodes::_checkcast, O1_scratch);  // who is complaining?
       __ bind(done);
       // Get the new MH:
       __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
       __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
     }
     break;
   case _adapter_prim_to_prim:
   case _adapter_ref_to_prim:
     // Handled completely by optimized cases.
     __ stop("init_AdapterMethodHandle should not issue this");
     break;
   case _adapter_opt_i2i:        // optimized subcase of adapt_prim_to_prim
 //case _adapter_opt_f2i:        // optimized subcase of adapt_prim_to_prim
   case _adapter_opt_l2i:        // optimized subcase of adapt_prim_to_prim
   case _adapter_opt_unboxi:     // optimized subcase of adapt_ref_to_prim
     {
       // Perform an in-place conversion to int or an int subword.
       __ ldsw(G3_amh_vmargslot, O0_argslot);
       Address vmarg = __ argument_address(O0_argslot);
       Address value;
       bool value_left_justified = false;
       switch (ek) {
       case _adapter_opt_i2i:
       case _adapter_opt_l2i:
         __ unimplemented(entry_name(ek));
         value = vmarg;
         break;
       case _adapter_opt_unboxi:
         {
           // Load the value up from the heap.
           __ ld_ptr(vmarg, O1_scratch);
           int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
 #ifdef ASSERT
           for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
             if (is_subword_type(BasicType(bt)))
               assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
           }
 #endif
           __ null_check(O1_scratch, value_offset);
           value = Address(O1_scratch, value_offset);
 #ifdef _BIG_ENDIAN
           // Values stored in objects are packed.
           value_left_justified = true;
 #endif
         }
         break;
       default:
         ShouldNotReachHere();
       }
       // This check is required on _BIG_ENDIAN
       Register G5_vminfo = G5_index;
       __ ldsw(G3_amh_conversion, G5_vminfo);
       assert(CONV_VMINFO_SHIFT == 0, "preshifted");
       // Original 32-bit vmdata word must be of this form:
       // | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
       __ lduw(value, O1_scratch);
       if (!value_left_justified)
         __ sll(O1_scratch, G5_vminfo, O1_scratch);
       Label zero_extend, done;
       __ btst(CONV_VMINFO_SIGN_FLAG, G5_vminfo);
       __ br(Assembler::zero, false, Assembler::pn, zero_extend);
       __ delayed()->nop();
       // this path is taken for int->byte, int->short
       __ sra(O1_scratch, G5_vminfo, O1_scratch);
       __ ba(false, done);
       __ delayed()->nop();
       __ bind(zero_extend);
       // this is taken for int->char
       __ srl(O1_scratch, G5_vminfo, O1_scratch);
       __ bind(done);
       __ st(O1_scratch, vmarg);
       // Get the new MH:
       __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
       __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
     }
     break;
   case _adapter_opt_i2l:        // optimized subcase of adapt_prim_to_prim
   case _adapter_opt_unboxl:     // optimized subcase of adapt_ref_to_prim
     {
       // Perform an in-place int-to-long or ref-to-long conversion.
       __ ldsw(G3_amh_vmargslot, O0_argslot);
       // On big-endian machine we duplicate the slot and store the MSW
       // in the first slot.
       __ add(Gargs, __ argument_offset(O0_argslot, 1), O0_argslot);
       insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK, O0_argslot, O1_scratch, O2_scratch, G5_index);
       Address arg_lsw(O0_argslot, 0);
       Address arg_msw(O0_argslot, -Interpreter::stackElementSize);
       switch (ek) {
       case _adapter_opt_i2l:
         {
           __ ldsw(arg_lsw, O2_scratch);      // Load LSW
 #ifndef _LP64
           __ signx(O2_scratch, O3_scratch);  // Sign extend
 #endif
           __ st_long(O2_scratch, arg_msw);   // Uses O2/O3 on !_LP64
         }
         break;
       case _adapter_opt_unboxl:
         {
           // Load the value up from the heap.
           __ ld_ptr(arg_lsw, O1_scratch);
           int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
           assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
           __ null_check(O1_scratch, value_offset);
           __ ld_long(Address(O1_scratch, value_offset), O2_scratch);  // Uses O2/O3 on !_LP64
           __ st_long(O2_scratch, arg_msw);
         }
         break;
       default:
         ShouldNotReachHere();
       }
       __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
       __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
     }
     break;
   case _adapter_opt_f2d:        // optimized subcase of adapt_prim_to_prim
   case _adapter_opt_d2f:        // optimized subcase of adapt_prim_to_prim
     {
       // perform an in-place floating primitive conversion
       __ unimplemented(entry_name(ek));
     }
     break;
   case _adapter_prim_to_ref:
     __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
     break;
   case _adapter_swap_args:
   case _adapter_rot_args:
     // handled completely by optimized cases
     __ stop("init_AdapterMethodHandle should not issue this");
     break;
   case _adapter_opt_swap_1:
   case _adapter_opt_swap_2:
   case _adapter_opt_rot_1_up:
   case _adapter_opt_rot_1_down:
   case _adapter_opt_rot_2_up:
   case _adapter_opt_rot_2_down:
     {
       int swap_bytes = 0, rotate = 0;
       get_ek_adapter_opt_swap_rot_info(ek, swap_bytes, rotate);
       // 'argslot' is the position of the first argument to swap.
       __ ldsw(G3_amh_vmargslot, O0_argslot);
       __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
       // 'vminfo' is the second.
       Register O1_destslot = O1_scratch;
       __ ldsw(G3_amh_conversion, O1_destslot);
       assert(CONV_VMINFO_SHIFT == 0, "preshifted");
       __ and3(O1_destslot, CONV_VMINFO_MASK, O1_destslot);
       __ add(Gargs, __ argument_offset(O1_destslot), O1_destslot);
       if (!rotate) {
         for (int i = 0; i < swap_bytes; i += wordSize) {
           __ ld_ptr(Address(O0_argslot,  i), O2_scratch);
           __ ld_ptr(Address(O1_destslot, i), O3_scratch);
           __ st_ptr(O3_scratch, Address(O0_argslot,  i));
           __ st_ptr(O2_scratch, Address(O1_destslot, i));
         }
       } else {
         // Save the first chunk, which is going to get overwritten.
         switch (swap_bytes) {
         case 4 : __ lduw(Address(O0_argslot, 0), O2_scratch); break;
         case 16: __ ldx( Address(O0_argslot, 8), O3_scratch); //fall-thru
         case 8 : __ ldx( Address(O0_argslot, 0), O2_scratch); break;
         default: ShouldNotReachHere();
         }
         if (rotate > 0) {
           // Rorate upward.
           __ sub(O0_argslot, swap_bytes, O0_argslot);
 #if ASSERT
           {
             // Verify that argslot > destslot, by at least swap_bytes.
             Label L_ok;
             __ cmp(O0_argslot, O1_destslot);
             __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, L_ok);
             __ delayed()->nop();
             __ stop("source must be above destination (upward rotation)");
             __ bind(L_ok);
           }
 #endif
           // Work argslot down to destslot, copying contiguous data upwards.
           // Pseudo-code:
           //   argslot  = src_addr - swap_bytes
           //   destslot = dest_addr
           //   while (argslot >= destslot) {
           //     *(argslot + swap_bytes) = *(argslot + 0);
           //     argslot--;
           //   }
           Label loop;
           __ bind(loop);
           __ ld_ptr(Address(O0_argslot, 0), G5_index);
           __ st_ptr(G5_index, Address(O0_argslot, swap_bytes));
           __ sub(O0_argslot, wordSize, O0_argslot);
           __ cmp(O0_argslot, O1_destslot);
           __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, loop);
           __ delayed()->nop();  // FILLME
         } else {
           __ add(O0_argslot, swap_bytes, O0_argslot);
 #if ASSERT
           {
             // Verify that argslot < destslot, by at least swap_bytes.
             Label L_ok;
             __ cmp(O0_argslot, O1_destslot);
             __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, L_ok);
             __ delayed()->nop();
             __ stop("source must be above destination (upward rotation)");
             __ bind(L_ok);
           }
 #endif
           // Work argslot up to destslot, copying contiguous data downwards.
           // Pseudo-code:
           //   argslot  = src_addr + swap_bytes
           //   destslot = dest_addr
           //   while (argslot >= destslot) {
           //     *(argslot - swap_bytes) = *(argslot + 0);
           //     argslot++;
           //   }
           Label loop;
           __ bind(loop);
           __ ld_ptr(Address(O0_argslot, 0), G5_index);
           __ st_ptr(G5_index, Address(O0_argslot, -swap_bytes));
           __ add(O0_argslot, wordSize, O0_argslot);
           __ cmp(O0_argslot, O1_destslot);
           __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, loop);
           __ delayed()->nop();  // FILLME
         }
         // Store the original first chunk into the destination slot, now free.
         switch (swap_bytes) {
         case 4 : __ stw(O2_scratch, Address(O1_destslot, 0)); break;
         case 16: __ stx(O3_scratch, Address(O1_destslot, 8)); // fall-thru
         case 8 : __ stx(O2_scratch, Address(O1_destslot, 0)); break;
         default: ShouldNotReachHere();
         }
       }
       __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
       __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
     }
     break;
   case _adapter_dup_args:
     {
       // 'argslot' is the position of the first argument to duplicate.
       __ ldsw(G3_amh_vmargslot, O0_argslot);
       __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
       // 'stack_move' is negative number of words to duplicate.
       Register G5_stack_move = G5_index;
       __ ldsw(G3_amh_conversion, G5_stack_move);
       __ sra(G5_stack_move, CONV_STACK_MOVE_SHIFT, G5_stack_move);
       // Remember the old Gargs (argslot[0]).
       Register O1_oldarg = O1_scratch;
       __ mov(Gargs, O1_oldarg);
       // Move Gargs down to make room for dups.
       __ sll_ptr(G5_stack_move, LogBytesPerWord, G5_stack_move);
       __ add(Gargs, G5_stack_move, Gargs);
       // Compute the new Gargs (argslot[0]).
       Register O2_newarg = O2_scratch;
       __ mov(Gargs, O2_newarg);
       // Copy from oldarg[0...] down to newarg[0...]
       // Pseude-code:
       //   O1_oldarg  = old-Gargs
       //   O2_newarg  = new-Gargs
       //   O0_argslot = argslot
       //   while (O2_newarg < O1_oldarg) *O2_newarg = *O0_argslot++
       Label loop;
       __ bind(loop);
       __ ld_ptr(Address(O0_argslot, 0), O3_scratch);
       __ st_ptr(O3_scratch, Address(O2_newarg, 0));
       __ add(O0_argslot, wordSize, O0_argslot);
       __ add(O2_newarg,  wordSize, O2_newarg);
       __ cmp(O2_newarg, O1_oldarg);
       __ brx(Assembler::less, false, Assembler::pt, loop);
       __ delayed()->nop();  // FILLME
       __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
       __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
     }
     break;
   case _adapter_drop_args:
     {
       // 'argslot' is the position of the first argument to nuke.
       __ ldsw(G3_amh_vmargslot, O0_argslot);
       __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
       // 'stack_move' is number of words to drop.
       Register G5_stack_move = G5_index;
       __ ldsw(G3_amh_conversion, G5_stack_move);
       __ sra(G5_stack_move, CONV_STACK_MOVE_SHIFT, G5_stack_move);
       remove_arg_slots(_masm, G5_stack_move, O0_argslot, O1_scratch, O2_scratch, O3_scratch);
       __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
       __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
     }
     break;
   case _adapter_collect_args:
     __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
     break;
   case _adapter_spread_args:
     // Handled completely by optimized cases.
     __ stop("init_AdapterMethodHandle should not issue this");
     break;
   case _adapter_opt_spread_0:
   case _adapter_opt_spread_1:
   case _adapter_opt_spread_more:
     {
       // spread an array out into a group of arguments
       __ unimplemented(entry_name(ek));
     }
     break;
   case _adapter_flyby:
   case _adapter_ricochet:
     __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
     break;
   default:
     ShouldNotReachHere();
   }
   address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
   __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
   init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/sparc/vm/methodHandles_sparc.cpp@d55217dc206f (annotated)

src/cpu/sparc/vm/methodHandles_sparc.cpp