--- a/src/cpu/sparc/vm/methodHandles_sparc.cpp	Thu Apr 29 00:03:40 2010 -0700
+++ b/src/cpu/sparc/vm/methodHandles_sparc.cpp	Thu Apr 29 06:30:25 2010 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright 1997-2009 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 2008-2010 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
@@ -29,6 +29,9 @@
 
 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) {
@@ -59,12 +62,876 @@
 
 // Code generation
 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm) {
-  ShouldNotReachHere(); //NYI, 6815692
-  return NULL;
+  // 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
+  __ ld_ptr(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
+
+
+//------------------------------------------------------------------------------
+// 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) {
-  ShouldNotReachHere(); //NYI, 6815692
+  // 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();
+  if (UseCompressedOops)  __ unimplemented("UseCompressedOops");
+
+#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.
+      __ sub(SP,    4*stackElementSize, SP);
+      __ sub(Gargs, 3*stackElementSize, Gargs);
+      //__ sub(Lesp,  3*stackElementSize, Lesp);
+
+      // 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:
+    {
+      __ ld_ptr(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;
+      __ ld_ptr(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:
+      __ ld_ptr(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) {
+        __ ld_ptr(G3_mh_vmtarget, G5_method);  // target is a methodOop
+        __ verify_oop(G5_method);
+        __ jump_indirect_to(G5_method_fie, O1_scratch);
+        __ delayed()->nop();
+      } else {
+        __ ld_ptr(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:
+    __ ld_ptr(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?
+      __ ld_ptr(G3_amh_argument, G5_klass);  // This is a Class object!
+      __ ld_ptr(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
+      __ ld_ptr(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:
+      __ ld_ptr(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:
+      __ ld_ptr(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();
+      }
+
+      __ ld_ptr(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();
+        }
+      }
+
+      __ ld_ptr(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
+
+      __ ld_ptr(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);
+
+      __ ld_ptr(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));
 }