jrose@1145: /*
twisti@2436:  * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
jrose@1145:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jrose@1145:  *
jrose@1145:  * This code is free software; you can redistribute it and/or modify it
jrose@1145:  * under the terms of the GNU General Public License version 2 only, as
jrose@1145:  * published by the Free Software Foundation.
jrose@1145:  *
jrose@1145:  * This code is distributed in the hope that it will be useful, but WITHOUT
jrose@1145:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jrose@1145:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
jrose@1145:  * version 2 for more details (a copy is included in the LICENSE file that
jrose@1145:  * accompanied this code).
jrose@1145:  *
jrose@1145:  * You should have received a copy of the GNU General Public License version
jrose@1145:  * 2 along with this work; if not, write to the Free Software Foundation,
jrose@1145:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jrose@1145:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
jrose@1145:  *
jrose@1145:  */
jrose@1145: 
stefank@2314: #include "precompiled.hpp"
stefank@2314: #include "interpreter/interpreter.hpp"
stefank@2314: #include "memory/allocation.inline.hpp"
stefank@2314: #include "prims/methodHandles.hpp"
jrose@1145: 
jrose@1145: #define __ _masm->
jrose@1145: 
twisti@2204: #ifdef PRODUCT
twisti@2204: #define BLOCK_COMMENT(str) /* nothing */
twisti@2204: #else
twisti@2204: #define BLOCK_COMMENT(str) __ block_comment(str)
twisti@2204: #endif
twisti@2204: 
twisti@2204: #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
twisti@2204: 
jrose@1145: address MethodHandleEntry::start_compiled_entry(MacroAssembler* _masm,
jrose@1145:                                                 address interpreted_entry) {
twisti@1858:   // Just before the actual machine code entry point, allocate space
twisti@1858:   // for a MethodHandleEntry::Data record, so that we can manage everything
twisti@1858:   // from one base pointer.
jrose@1145:   __ align(wordSize);
jrose@1145:   address target = __ pc() + sizeof(Data);
jrose@1145:   while (__ pc() < target) {
jrose@1145:     __ nop();
jrose@1145:     __ align(wordSize);
jrose@1145:   }
jrose@1145: 
jrose@1145:   MethodHandleEntry* me = (MethodHandleEntry*) __ pc();
jrose@1145:   me->set_end_address(__ pc());         // set a temporary end_address
jrose@1145:   me->set_from_interpreted_entry(interpreted_entry);
jrose@1145:   me->set_type_checking_entry(NULL);
jrose@1145: 
jrose@1145:   return (address) me;
jrose@1145: }
jrose@1145: 
jrose@1145: MethodHandleEntry* MethodHandleEntry::finish_compiled_entry(MacroAssembler* _masm,
jrose@1145:                                                 address start_addr) {
jrose@1145:   MethodHandleEntry* me = (MethodHandleEntry*) start_addr;
jrose@1145:   assert(me->end_address() == start_addr, "valid ME");
jrose@1145: 
jrose@1145:   // Fill in the real end_address:
jrose@1145:   __ align(wordSize);
jrose@1145:   me->set_end_address(__ pc());
jrose@1145: 
jrose@1145:   return me;
jrose@1145: }
jrose@1145: 
never@2950: // stack walking support
never@2950: 
never@2950: frame MethodHandles::ricochet_frame_sender(const frame& fr, RegisterMap *map) {
never@2950:   //RicochetFrame* f = RicochetFrame::from_frame(fr);
never@2950:   // Cf. is_interpreted_frame path of frame::sender
never@2950:   intptr_t* younger_sp = fr.sp();
never@2950:   intptr_t* sp         = fr.sender_sp();
never@2950:   map->make_integer_regs_unsaved();
never@2950:   map->shift_window(sp, younger_sp);
never@2950:   bool this_frame_adjusted_stack = true;  // I5_savedSP is live in this RF
never@2950:   return frame(sp, younger_sp, this_frame_adjusted_stack);
never@2950: }
never@2950: 
never@2950: void MethodHandles::ricochet_frame_oops_do(const frame& fr, OopClosure* blk, const RegisterMap* reg_map) {
never@2950:   ResourceMark rm;
never@2950:   RicochetFrame* f = RicochetFrame::from_frame(fr);
never@2950: 
never@2950:   // pick up the argument type descriptor:
never@2950:   Thread* thread = Thread::current();
never@2950:   Handle cookie(thread, f->compute_saved_args_layout(true, true));
never@2950: 
never@2950:   // process fixed part
never@2950:   blk->do_oop((oop*)f->saved_target_addr());
never@2950:   blk->do_oop((oop*)f->saved_args_layout_addr());
never@2950: 
never@2950:   // process variable arguments:
never@2950:   if (cookie.is_null())  return;  // no arguments to describe
never@2950: 
never@2950:   // the cookie is actually the invokeExact method for my target
never@2950:   // his argument signature is what I'm interested in
never@2950:   assert(cookie->is_method(), "");
never@2950:   methodHandle invoker(thread, methodOop(cookie()));
never@2950:   assert(invoker->name() == vmSymbols::invokeExact_name(), "must be this kind of method");
never@2950:   assert(!invoker->is_static(), "must have MH argument");
never@2950:   int slot_count = invoker->size_of_parameters();
never@2950:   assert(slot_count >= 1, "must include 'this'");
never@2950:   intptr_t* base = f->saved_args_base();
never@2950:   intptr_t* retval = NULL;
never@2950:   if (f->has_return_value_slot())
never@2950:     retval = f->return_value_slot_addr();
never@2950:   int slot_num = slot_count - 1;
never@2950:   intptr_t* loc = &base[slot_num];
never@2950:   //blk->do_oop((oop*) loc);   // original target, which is irrelevant
never@2950:   int arg_num = 0;
never@2950:   for (SignatureStream ss(invoker->signature()); !ss.is_done(); ss.next()) {
never@2950:     if (ss.at_return_type())  continue;
never@2950:     BasicType ptype = ss.type();
never@2950:     if (ptype == T_ARRAY)  ptype = T_OBJECT; // fold all refs to T_OBJECT
never@2950:     assert(ptype >= T_BOOLEAN && ptype <= T_OBJECT, "not array or void");
never@2950:     slot_num -= type2size[ptype];
never@2950:     loc = &base[slot_num];
never@2950:     bool is_oop = (ptype == T_OBJECT && loc != retval);
never@2950:     if (is_oop)  blk->do_oop((oop*)loc);
never@2950:     arg_num += 1;
never@2950:   }
never@2950:   assert(slot_num == 0, "must have processed all the arguments");
never@2950: }
never@2950: 
never@2950: // Ricochet Frames
never@2950: const Register MethodHandles::RicochetFrame::L1_continuation      = L1;
never@2950: const Register MethodHandles::RicochetFrame::L2_saved_target      = L2;
never@2950: const Register MethodHandles::RicochetFrame::L3_saved_args_layout = L3;
never@2950: const Register MethodHandles::RicochetFrame::L4_saved_args_base   = L4; // cf. Gargs = G4
never@2950: const Register MethodHandles::RicochetFrame::L5_conversion        = L5;
never@2950: #ifdef ASSERT
never@2950: const Register MethodHandles::RicochetFrame::L0_magic_number_1    = L0;
never@2950: #endif //ASSERT
never@2950: 
never@2950: oop MethodHandles::RicochetFrame::compute_saved_args_layout(bool read_cache, bool write_cache) {
never@2950:   if (read_cache) {
never@2950:     oop cookie = saved_args_layout();
never@2950:     if (cookie != NULL)  return cookie;
never@2950:   }
never@2950:   oop target = saved_target();
never@2950:   oop mtype  = java_lang_invoke_MethodHandle::type(target);
never@2950:   oop mtform = java_lang_invoke_MethodType::form(mtype);
never@2950:   oop cookie = java_lang_invoke_MethodTypeForm::vmlayout(mtform);
never@2950:   if (write_cache)  {
never@2950:     (*saved_args_layout_addr()) = cookie;
never@2950:   }
never@2950:   return cookie;
never@2950: }
never@2950: 
never@2950: void MethodHandles::RicochetFrame::generate_ricochet_blob(MacroAssembler* _masm,
never@2950:                                                           // output params:
never@2950:                                                           int* bounce_offset,
never@2950:                                                           int* exception_offset,
never@2950:                                                           int* frame_size_in_words) {
never@2950:   (*frame_size_in_words) = RicochetFrame::frame_size_in_bytes() / wordSize;
never@2950: 
never@2950:   address start = __ pc();
never@2950: 
never@2950: #ifdef ASSERT
never@2950:   __ illtrap(0); __ illtrap(0); __ illtrap(0);
never@2950:   // here's a hint of something special:
never@2950:   __ set(MAGIC_NUMBER_1, G0);
never@2950:   __ set(MAGIC_NUMBER_2, G0);
never@2950: #endif //ASSERT
never@2950:   __ illtrap(0);  // not reached
never@2950: 
never@2950:   // Return values are in registers.
never@2950:   // L1_continuation contains a cleanup continuation we must return
never@2950:   // to.
never@2950: 
never@2950:   (*bounce_offset) = __ pc() - start;
never@2950:   BLOCK_COMMENT("ricochet_blob.bounce");
never@2950: 
never@2950:   if (VerifyMethodHandles)  RicochetFrame::verify_clean(_masm);
never@2950:   trace_method_handle(_masm, "ricochet_blob.bounce");
never@2950: 
never@2950:   __ JMP(L1_continuation, 0);
never@2950:   __ delayed()->nop();
never@2950:   __ illtrap(0);
never@2950: 
never@2950:   DEBUG_ONLY(__ set(MAGIC_NUMBER_2, G0));
never@2950: 
never@2950:   (*exception_offset) = __ pc() - start;
never@2950:   BLOCK_COMMENT("ricochet_blob.exception");
never@2950: 
never@2950:   // compare this to Interpreter::rethrow_exception_entry, which is parallel code
never@2950:   // for example, see TemplateInterpreterGenerator::generate_throw_exception
never@2950:   // Live registers in:
never@2950:   //   Oexception  (O0): exception
never@2950:   //   Oissuing_pc (O1): return address/pc that threw exception (ignored, always equal to bounce addr)
never@2950:   __ verify_oop(Oexception);
never@2950: 
never@2950:   // Take down the frame.
never@2950: 
never@2950:   // Cf. InterpreterMacroAssembler::remove_activation.
never@2950:   leave_ricochet_frame(_masm, /*recv_reg=*/ noreg, I5_savedSP, I7);
never@2950: 
never@2950:   // We are done with this activation frame; find out where to go next.
never@2950:   // The continuation point will be an exception handler, which expects
never@2950:   // the following registers set up:
never@2950:   //
never@2950:   // Oexception: exception
never@2950:   // Oissuing_pc: the local call that threw exception
never@2950:   // Other On: garbage
never@2950:   // In/Ln:  the contents of the caller's register window
never@2950:   //
never@2950:   // We do the required restore at the last possible moment, because we
never@2950:   // need to preserve some state across a runtime call.
never@2950:   // (Remember that the caller activation is unknown--it might not be
never@2950:   // interpreted, so things like Lscratch are useless in the caller.)
never@2950:   __ mov(Oexception,  Oexception ->after_save());  // get exception in I0 so it will be on O0 after restore
never@2950:   __ add(I7, frame::pc_return_offset, Oissuing_pc->after_save());  // likewise set I1 to a value local to the caller
never@2950:   __ call_VM_leaf(L7_thread_cache,
never@2950:                   CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address),
never@2950:                   G2_thread, Oissuing_pc->after_save());
never@2950: 
never@2950:   // The caller's SP was adjusted upon method entry to accomodate
never@2950:   // the callee's non-argument locals. Undo that adjustment.
never@2950:   __ JMP(O0, 0);                         // return exception handler in caller
never@2950:   __ delayed()->restore(I5_savedSP, G0, SP);
never@2950: 
never@2950:   // (same old exception object is already in Oexception; see above)
never@2950:   // Note that an "issuing PC" is actually the next PC after the call
never@2950: }
never@2950: 
never@2950: void MethodHandles::RicochetFrame::enter_ricochet_frame(MacroAssembler* _masm,
never@2950:                                                         Register recv_reg,
never@2950:                                                         Register argv_reg,
never@2950:                                                         address return_handler) {
never@2950:   // does not include the __ save()
never@2950:   assert(argv_reg == Gargs, "");
never@2950:   Address G3_mh_vmtarget(   recv_reg, java_lang_invoke_MethodHandle::vmtarget_offset_in_bytes());
never@2950:   Address G3_amh_conversion(recv_reg, java_lang_invoke_AdapterMethodHandle::conversion_offset_in_bytes());
never@2950: 
never@2950:   // Create the RicochetFrame.
never@2950:   // Unlike on x86 we can store all required information in local
never@2950:   // registers.
never@2950:   BLOCK_COMMENT("push RicochetFrame {");
never@2950:   __ set(ExternalAddress(return_handler),          L1_continuation);
never@2950:   __ load_heap_oop(G3_mh_vmtarget,                 L2_saved_target);
never@2950:   __ mov(G0,                                       L3_saved_args_layout);
never@2950:   __ mov(Gargs,                                    L4_saved_args_base);
never@2950:   __ lduw(G3_amh_conversion,                       L5_conversion);  // 32-bit field
never@2950:   // I5, I6, I7 are already set up
never@2950:   DEBUG_ONLY(__ set((int32_t) MAGIC_NUMBER_1,      L0_magic_number_1));
never@2950:   BLOCK_COMMENT("} RicochetFrame");
never@2950: }
never@2950: 
never@2950: void MethodHandles::RicochetFrame::leave_ricochet_frame(MacroAssembler* _masm,
never@2950:                                                         Register recv_reg,
never@2950:                                                         Register new_sp_reg,
never@2950:                                                         Register sender_pc_reg) {
never@2950:   assert(new_sp_reg == I5_savedSP, "exact_sender_sp already in place");
never@2950:   assert(sender_pc_reg == I7, "in a fixed place");
never@2950:   // does not include the __ ret() & __ restore()
never@2950:   assert_different_registers(recv_reg, new_sp_reg, sender_pc_reg);
never@2950:   // Take down the frame.
never@2950:   // Cf. InterpreterMacroAssembler::remove_activation.
never@2950:   BLOCK_COMMENT("end_ricochet_frame {");
never@2950:   if (recv_reg->is_valid())
never@2950:     __ mov(L2_saved_target, recv_reg);
never@2950:   BLOCK_COMMENT("} end_ricochet_frame");
never@2950: }
never@2950: 
never@2950: // Emit code to verify that FP is pointing at a valid ricochet frame.
never@2950: #ifdef ASSERT
never@2950: enum {
never@2950:   ARG_LIMIT = 255, SLOP = 35,
never@2950:   // use this parameter for checking for garbage stack movements:
never@2950:   UNREASONABLE_STACK_MOVE = (ARG_LIMIT + SLOP)
never@2950:   // the slop defends against false alarms due to fencepost errors
never@2950: };
never@2950: 
never@2950: void MethodHandles::RicochetFrame::verify_clean(MacroAssembler* _masm) {
never@2950:   // The stack should look like this:
never@2950:   //    ... keep1 | dest=42 | keep2 | magic | handler | magic | recursive args | [RF]
never@2950:   // Check various invariants.
never@2950: 
never@2950:   Register O7_temp = O7, O5_temp = O5;
never@2950: 
never@2950:   Label L_ok_1, L_ok_2, L_ok_3, L_ok_4;
never@2950:   BLOCK_COMMENT("verify_clean {");
never@2950:   // Magic numbers must check out:
never@2950:   __ set((int32_t) MAGIC_NUMBER_1, O7_temp);
never@2950:   __ cmp(O7_temp, L0_magic_number_1);
never@2950:   __ br(Assembler::equal, false, Assembler::pt, L_ok_1);
never@2950:   __ delayed()->nop();
never@2950:   __ stop("damaged ricochet frame: MAGIC_NUMBER_1 not found");
never@2950: 
never@2950:   __ BIND(L_ok_1);
never@2950: 
never@2950:   // Arguments pointer must look reasonable:
never@2950: #ifdef _LP64
never@2950:   Register FP_temp = O5_temp;
never@2950:   __ add(FP, STACK_BIAS, FP_temp);
never@2950: #else
never@2950:   Register FP_temp = FP;
never@2950: #endif
never@2950:   __ cmp(L4_saved_args_base, FP_temp);
never@2950:   __ br(Assembler::greaterEqualUnsigned, false, Assembler::pt, L_ok_2);
never@2950:   __ delayed()->nop();
never@2950:   __ stop("damaged ricochet frame: L4 < FP");
never@2950: 
never@2950:   __ BIND(L_ok_2);
never@2950:   __ sub(L4_saved_args_base, UNREASONABLE_STACK_MOVE * Interpreter::stackElementSize, O7_temp);
never@2950:   __ cmp(O7_temp, FP_temp);
never@2950:   __ br(Assembler::lessEqualUnsigned, false, Assembler::pt, L_ok_3);
never@2950:   __ delayed()->nop();
never@2950:   __ stop("damaged ricochet frame: (L4 - UNREASONABLE_STACK_MOVE) > FP");
never@2950: 
never@2950:   __ BIND(L_ok_3);
never@2950:   extract_conversion_dest_type(_masm, L5_conversion, O7_temp);
never@2950:   __ cmp(O7_temp, T_VOID);
never@2950:   __ br(Assembler::equal, false, Assembler::pt, L_ok_4);
never@2950:   __ delayed()->nop();
never@2950:   extract_conversion_vminfo(_masm, L5_conversion, O5_temp);
never@2950:   __ ld_ptr(L4_saved_args_base, __ argument_offset(O5_temp, O5_temp), O7_temp);
never@2950:   assert(__ is_simm13(RETURN_VALUE_PLACEHOLDER), "must be simm13");
never@2950:   __ cmp(O7_temp, (int32_t) RETURN_VALUE_PLACEHOLDER);
never@2950:   __ brx(Assembler::equal, false, Assembler::pt, L_ok_4);
never@2950:   __ delayed()->nop();
never@2950:   __ stop("damaged ricochet frame: RETURN_VALUE_PLACEHOLDER not found");
never@2950:   __ BIND(L_ok_4);
never@2950:   BLOCK_COMMENT("} verify_clean");
never@2950: }
never@2950: #endif //ASSERT
never@2950: 
never@2950: void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg, Register temp_reg, Register temp2_reg) {
never@2950:   if (VerifyMethodHandles)
never@2950:     verify_klass(_masm, klass_reg, SystemDictionaryHandles::Class_klass(), temp_reg, temp2_reg,
never@2950:                  "AMH argument is a Class");
never@2950:   __ load_heap_oop(Address(klass_reg, java_lang_Class::klass_offset_in_bytes()), klass_reg);
never@2950: }
never@2950: 
never@2950: void MethodHandles::load_conversion_vminfo(MacroAssembler* _masm, Address conversion_field_addr, Register reg) {
never@2950:   assert(CONV_VMINFO_SHIFT == 0, "preshifted");
never@2950:   assert(CONV_VMINFO_MASK == right_n_bits(BitsPerByte), "else change type of following load");
never@2950:   __ ldub(conversion_field_addr.plus_disp(BytesPerInt - 1), reg);
never@2950: }
never@2950: 
never@2950: void MethodHandles::extract_conversion_vminfo(MacroAssembler* _masm, Register conversion_field_reg, Register reg) {
never@2950:   assert(CONV_VMINFO_SHIFT == 0, "preshifted");
never@2950:   __ and3(conversion_field_reg, CONV_VMINFO_MASK, reg);
never@2950: }
never@2950: 
never@2950: void MethodHandles::extract_conversion_dest_type(MacroAssembler* _masm, Register conversion_field_reg, Register reg) {
never@2950:   __ srl(conversion_field_reg, CONV_DEST_TYPE_SHIFT, reg);
never@2950:   __ and3(reg, 0x0F, reg);
never@2950: }
never@2950: 
never@2950: void MethodHandles::load_stack_move(MacroAssembler* _masm,
never@2950:                                     Address G3_amh_conversion,
never@2950:                                     Register stack_move_reg) {
never@2950:   BLOCK_COMMENT("load_stack_move {");
never@2950:   __ ldsw(G3_amh_conversion, stack_move_reg);
never@2950:   __ sra(stack_move_reg, CONV_STACK_MOVE_SHIFT, stack_move_reg);
never@2950:   if (VerifyMethodHandles) {
never@2950:     Label L_ok, L_bad;
never@2950:     int32_t stack_move_limit = 0x0800;  // extra-large
never@2950:     __ cmp(stack_move_reg, stack_move_limit);
never@2950:     __ br(Assembler::greaterEqual, false, Assembler::pn, L_bad);
never@2950:     __ delayed()->nop();
never@2950:     __ cmp(stack_move_reg, -stack_move_limit);
never@2950:     __ br(Assembler::greater, false, Assembler::pt, L_ok);
never@2950:     __ delayed()->nop();
never@2950:     __ BIND(L_bad);
never@2950:     __ stop("load_stack_move of garbage value");
never@2950:     __ BIND(L_ok);
never@2950:   }
never@2950:   BLOCK_COMMENT("} load_stack_move");
never@2950: }
never@2950: 
never@2950: #ifdef ASSERT
never@2950: void MethodHandles::RicochetFrame::verify() const {
never@2950:   assert(magic_number_1() == MAGIC_NUMBER_1, "");
never@2950:   if (!Universe::heap()->is_gc_active()) {
never@2950:     if (saved_args_layout() != NULL) {
never@2950:       assert(saved_args_layout()->is_method(), "must be valid oop");
never@2950:     }
never@2950:     if (saved_target() != NULL) {
never@2950:       assert(java_lang_invoke_MethodHandle::is_instance(saved_target()), "checking frame value");
never@2950:     }
never@2950:   }
never@2950:   int conv_op = adapter_conversion_op(conversion());
never@2950:   assert(conv_op == java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS ||
never@2950:          conv_op == java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS ||
never@2950:          conv_op == java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_REF,
never@2950:          "must be a sane conversion");
never@2950:   if (has_return_value_slot()) {
never@2950:     assert(*return_value_slot_addr() == RETURN_VALUE_PLACEHOLDER, "");
never@2950:   }
never@2950: }
never@2950: 
never@2950: void MethodHandles::verify_argslot(MacroAssembler* _masm, Register argslot_reg, Register temp_reg, const char* error_message) {
never@2950:   // Verify that argslot lies within (Gargs, FP].
never@2950:   Label L_ok, L_bad;
never@2950:   BLOCK_COMMENT("verify_argslot {");
never@2950:   __ add(FP, STACK_BIAS, temp_reg);  // STACK_BIAS is zero on !_LP64
never@2950:   __ cmp(argslot_reg, temp_reg);
never@2950:   __ brx(Assembler::greaterUnsigned, false, Assembler::pn, L_bad);
never@2950:   __ delayed()->nop();
never@2950:   __ cmp(Gargs, argslot_reg);
never@2950:   __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, L_ok);
never@2950:   __ delayed()->nop();
never@2950:   __ BIND(L_bad);
never@2950:   __ stop(error_message);
never@2950:   __ BIND(L_ok);
never@2950:   BLOCK_COMMENT("} verify_argslot");
never@2950: }
never@2950: 
never@2950: void MethodHandles::verify_argslots(MacroAssembler* _masm,
never@2950:                                     RegisterOrConstant arg_slots,
never@2950:                                     Register arg_slot_base_reg,
never@2950:                                     Register temp_reg,
never@2950:                                     Register temp2_reg,
never@2950:                                     bool negate_argslots,
never@2950:                                     const char* error_message) {
never@2950:   // Verify that [argslot..argslot+size) lies within (Gargs, FP).
never@2950:   Label L_ok, L_bad;
never@2950:   BLOCK_COMMENT("verify_argslots {");
never@2950:   if (negate_argslots) {
never@2950:     if (arg_slots.is_constant()) {
never@2950:       arg_slots = -1 * arg_slots.as_constant();
never@2950:     } else {
never@2950:       __ neg(arg_slots.as_register(), temp_reg);
never@2950:       arg_slots = temp_reg;
never@2950:     }
never@2950:   }
never@2950:   __ add(arg_slot_base_reg, __ argument_offset(arg_slots, temp_reg), temp_reg);
never@2950:   __ add(FP, STACK_BIAS, temp2_reg);  // STACK_BIAS is zero on !_LP64
never@2950:   __ cmp(temp_reg, temp2_reg);
never@2950:   __ brx(Assembler::greaterUnsigned, false, Assembler::pn, L_bad);
never@2950:   __ delayed()->nop();
never@2950:   // Gargs points to the first word so adjust by BytesPerWord
never@2950:   __ add(arg_slot_base_reg, BytesPerWord, temp_reg);
never@2950:   __ cmp(Gargs, temp_reg);
never@2950:   __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, L_ok);
never@2950:   __ delayed()->nop();
never@2950:   __ BIND(L_bad);
never@2950:   __ stop(error_message);
never@2950:   __ BIND(L_ok);
never@2950:   BLOCK_COMMENT("} verify_argslots");
never@2950: }
never@2950: 
never@2950: // Make sure that arg_slots has the same sign as the given direction.
never@2950: // If (and only if) arg_slots is a assembly-time constant, also allow it to be zero.
never@2950: void MethodHandles::verify_stack_move(MacroAssembler* _masm,
never@2950:                                       RegisterOrConstant arg_slots, int direction) {
never@2950:   enum { UNREASONABLE_STACK_MOVE = 256 * 4 };  // limit of 255 arguments
never@2950:   bool allow_zero = arg_slots.is_constant();
never@2950:   if (direction == 0) { direction = +1; allow_zero = true; }
never@2950:   assert(stack_move_unit() == -1, "else add extra checks here");
never@2950:   if (arg_slots.is_register()) {
never@2950:     Label L_ok, L_bad;
never@2950:     BLOCK_COMMENT("verify_stack_move {");
never@2950:     // __ btst(-stack_move_unit() - 1, arg_slots.as_register());  // no need
never@2950:     // __ br(Assembler::notZero, false, Assembler::pn, L_bad);
never@2950:     // __ delayed()->nop();
never@2950:     __ cmp(arg_slots.as_register(), (int32_t) NULL_WORD);
never@2950:     if (direction > 0) {
never@2950:       __ br(allow_zero ? Assembler::less : Assembler::lessEqual, false, Assembler::pn, L_bad);
never@2950:       __ delayed()->nop();
never@2950:       __ cmp(arg_slots.as_register(), (int32_t) UNREASONABLE_STACK_MOVE);
never@2950:       __ br(Assembler::less, false, Assembler::pn, L_ok);
never@2950:       __ delayed()->nop();
never@2950:     } else {
never@2950:       __ br(allow_zero ? Assembler::greater : Assembler::greaterEqual, false, Assembler::pn, L_bad);
never@2950:       __ delayed()->nop();
never@2950:       __ cmp(arg_slots.as_register(), (int32_t) -UNREASONABLE_STACK_MOVE);
never@2950:       __ br(Assembler::greater, false, Assembler::pn, L_ok);
never@2950:       __ delayed()->nop();
never@2950:     }
never@2950:     __ BIND(L_bad);
never@2950:     if (direction > 0)
never@2950:       __ stop("assert arg_slots > 0");
never@2950:     else
never@2950:       __ stop("assert arg_slots < 0");
never@2950:     __ BIND(L_ok);
never@2950:     BLOCK_COMMENT("} verify_stack_move");
never@2950:   } else {
never@2950:     intptr_t size = arg_slots.as_constant();
never@2950:     if (direction < 0)  size = -size;
never@2950:     assert(size >= 0, "correct direction of constant move");
never@2950:     assert(size < UNREASONABLE_STACK_MOVE, "reasonable size of constant move");
never@2950:   }
never@2950: }
never@2950: 
never@2950: void MethodHandles::verify_klass(MacroAssembler* _masm,
never@2950:                                  Register obj_reg, KlassHandle klass,
never@2950:                                  Register temp_reg, Register temp2_reg,
never@2950:                                  const char* error_message) {
never@2950:   oop* klass_addr = klass.raw_value();
never@2950:   assert(klass_addr >= SystemDictionaryHandles::Object_klass().raw_value() &&
never@2950:          klass_addr <= SystemDictionaryHandles::Long_klass().raw_value(),
never@2950:          "must be one of the SystemDictionaryHandles");
never@2950:   Label L_ok, L_bad;
never@2950:   BLOCK_COMMENT("verify_klass {");
never@2950:   __ verify_oop(obj_reg);
never@2950:   __ br_null(obj_reg, false, Assembler::pn, L_bad);
never@2950:   __ delayed()->nop();
never@2950:   __ load_klass(obj_reg, temp_reg);
never@2950:   __ set(ExternalAddress(klass_addr), temp2_reg);
never@2950:   __ ld_ptr(Address(temp2_reg, 0), temp2_reg);
never@2950:   __ cmp(temp_reg, temp2_reg);
never@2950:   __ brx(Assembler::equal, false, Assembler::pt, L_ok);
never@2950:   __ delayed()->nop();
never@2950:   intptr_t super_check_offset = klass->super_check_offset();
never@2950:   __ ld_ptr(Address(temp_reg, super_check_offset), temp_reg);
never@2950:   __ set(ExternalAddress(klass_addr), temp2_reg);
never@2950:   __ ld_ptr(Address(temp2_reg, 0), temp2_reg);
never@2950:   __ cmp(temp_reg, temp2_reg);
never@2950:   __ brx(Assembler::equal, false, Assembler::pt, L_ok);
never@2950:   __ delayed()->nop();
never@2950:   __ BIND(L_bad);
never@2950:   __ stop(error_message);
never@2950:   __ BIND(L_ok);
never@2950:   BLOCK_COMMENT("} verify_klass");
never@2950: }
never@2950: #endif // ASSERT
jrose@1145: 
jrose@1145: // Code generation
jrose@1145: address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm) {
twisti@2271:   // I5_savedSP/O5_savedSP: sender SP (must preserve)
twisti@1858:   // G4 (Gargs): incoming argument list (must preserve)
twisti@2271:   // G5_method:  invoke methodOop
twisti@1858:   // G3_method_handle: receiver method handle (must load from sp[MethodTypeForm.vmslots])
twisti@2271:   // O0, O1, O2, O3, O4: garbage temps, blown away
twisti@2271:   Register O0_mtype   = O0;
twisti@1858:   Register O1_scratch = O1;
jrose@2266:   Register O2_scratch = O2;
jrose@2266:   Register O3_scratch = O3;
twisti@2271:   Register O4_argslot = O4;
jrose@2266:   Register O4_argbase = O4;
twisti@1858: 
twisti@1858:   // emit WrongMethodType path first, to enable back-branch from main path
twisti@1858:   Label wrong_method_type;
twisti@1858:   __ bind(wrong_method_type);
jrose@2266:   Label invoke_generic_slow_path;
jrose@2266:   assert(methodOopDesc::intrinsic_id_size_in_bytes() == sizeof(u1), "");;
jrose@2266:   __ ldub(Address(G5_method, methodOopDesc::intrinsic_id_offset_in_bytes()), O1_scratch);
jrose@2266:   __ cmp(O1_scratch, (int) vmIntrinsics::_invokeExact);
jrose@2266:   __ brx(Assembler::notEqual, false, Assembler::pt, invoke_generic_slow_path);
jrose@2266:   __ delayed()->nop();
twisti@2271:   __ mov(O0_mtype, G5_method_type);  // required by throw_WrongMethodType
jrose@2266:   // mov(G3_method_handle, G3_method_handle);  // already in this register
twisti@1858:   __ jump_to(AddressLiteral(Interpreter::throw_WrongMethodType_entry()), O1_scratch);
twisti@1858:   __ delayed()->nop();
twisti@1858: 
twisti@1858:   // here's where control starts out:
twisti@1858:   __ align(CodeEntryAlignment);
twisti@1858:   address entry_point = __ pc();
twisti@1858: 
jrose@2266:   // fetch the MethodType from the method handle
never@2950:   // FIXME: Interpreter should transmit pre-popped stack pointer, to locate base of arg list.
never@2950:   // This would simplify several touchy bits of code.
never@2950:   // See 6984712: JSR 292 method handle calls need a clean argument base pointer
twisti@1858:   {
twisti@1858:     Register tem = G5_method;
twisti@1858:     for (jint* pchase = methodOopDesc::method_type_offsets_chain(); (*pchase) != -1; pchase++) {
twisti@2271:       __ ld_ptr(Address(tem, *pchase), O0_mtype);
twisti@2271:       tem = O0_mtype;          // in case there is another indirection
twisti@1858:     }
twisti@1858:   }
twisti@1858: 
twisti@1858:   // given the MethodType, find out where the MH argument is buried
jrose@2639:   __ load_heap_oop(Address(O0_mtype,   __ delayed_value(java_lang_invoke_MethodType::form_offset_in_bytes,        O1_scratch)), O4_argslot);
jrose@2639:   __ ldsw(         Address(O4_argslot, __ delayed_value(java_lang_invoke_MethodTypeForm::vmslots_offset_in_bytes, O1_scratch)), O4_argslot);
never@2950:   __ add(__ argument_address(O4_argslot, O4_argslot, 1), O4_argbase);
jrose@2266:   // Note: argument_address uses its input as a scratch register!
never@2950:   Address mh_receiver_slot_addr(O4_argbase, -Interpreter::stackElementSize);
never@2950:   __ ld_ptr(mh_receiver_slot_addr, G3_method_handle);
twisti@1858: 
jrose@2266:   trace_method_handle(_masm, "invokeExact");
jrose@2266: 
twisti@2271:   __ check_method_handle_type(O0_mtype, G3_method_handle, O1_scratch, wrong_method_type);
never@2950: 
never@2950:   // Nobody uses the MH receiver slot after this.  Make sure.
never@2950:   DEBUG_ONLY(__ set((int32_t) 0x999999, O1_scratch); __ st_ptr(O1_scratch, mh_receiver_slot_addr));
never@2950: 
twisti@1858:   __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858: 
jrose@2266:   // for invokeGeneric (only), apply argument and result conversions on the fly
jrose@2266:   __ bind(invoke_generic_slow_path);
jrose@2266: #ifdef ASSERT
never@2950:   if (VerifyMethodHandles) {
never@2950:     Label L;
jrose@2266:     __ ldub(Address(G5_method, methodOopDesc::intrinsic_id_offset_in_bytes()), O1_scratch);
jrose@2266:     __ cmp(O1_scratch, (int) vmIntrinsics::_invokeGeneric);
jrose@2266:     __ brx(Assembler::equal, false, Assembler::pt, L);
jrose@2266:     __ delayed()->nop();
jrose@2266:     __ stop("bad methodOop::intrinsic_id");
jrose@2266:     __ bind(L);
jrose@2266:   }
jrose@2266: #endif //ASSERT
jrose@2266: 
jrose@2266:   // make room on the stack for another pointer:
never@2950:   insert_arg_slots(_masm, 2 * stack_move_unit(), O4_argbase, O1_scratch, O2_scratch, O3_scratch);
jrose@2266:   // load up an adapter from the calling type (Java weaves this)
jrose@2266:   Register O2_form    = O2_scratch;
jrose@2266:   Register O3_adapter = O3_scratch;
jrose@2639:   __ load_heap_oop(Address(O0_mtype, __ delayed_value(java_lang_invoke_MethodType::form_offset_in_bytes,               O1_scratch)), O2_form);
twisti@2903:   __ load_heap_oop(Address(O2_form,  __ delayed_value(java_lang_invoke_MethodTypeForm::genericInvoker_offset_in_bytes, O1_scratch)), O3_adapter);
twisti@2903:   __ verify_oop(O3_adapter);
jrose@2266:   __ st_ptr(O3_adapter, Address(O4_argbase, 1 * Interpreter::stackElementSize));
jrose@2266:   // As a trusted first argument, pass the type being called, so the adapter knows
jrose@2266:   // the actual types of the arguments and return values.
jrose@2266:   // (Generic invokers are shared among form-families of method-type.)
twisti@2271:   __ st_ptr(O0_mtype,   Address(O4_argbase, 0 * Interpreter::stackElementSize));
jrose@2266:   // FIXME: assert that O3_adapter is of the right method-type.
jrose@2266:   __ mov(O3_adapter, G3_method_handle);
jrose@2266:   trace_method_handle(_masm, "invokeGeneric");
jrose@2266:   __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
jrose@2266: 
twisti@1858:   return entry_point;
jrose@1145: }
jrose@1145: 
never@2950: // Workaround for C++ overloading nastiness on '0' for RegisterOrConstant.
never@2950: static RegisterOrConstant constant(int value) {
never@2950:   return RegisterOrConstant(value);
never@2950: }
twisti@1858: 
never@2950: static void load_vmargslot(MacroAssembler* _masm, Address vmargslot_addr, Register result) {
never@2950:   __ ldsw(vmargslot_addr, result);
never@2950: }
never@2950: 
never@2950: static RegisterOrConstant adjust_SP_and_Gargs_down_by_slots(MacroAssembler* _masm,
never@2950:                                                             RegisterOrConstant arg_slots,
never@2950:                                                             Register temp_reg, Register temp2_reg) {
never@2950:   // Keep the stack pointer 2*wordSize aligned.
never@2950:   const int TwoWordAlignmentMask = right_n_bits(LogBytesPerWord + 1);
never@2950:   if (arg_slots.is_constant()) {
never@2950:     const int        offset = arg_slots.as_constant() << LogBytesPerWord;
never@2950:     const int masked_offset = round_to(offset, 2 * BytesPerWord);
never@2950:     const int masked_offset2 = (offset + 1*BytesPerWord) & ~TwoWordAlignmentMask;
never@2950:     assert(masked_offset == masked_offset2, "must agree");
never@2950:     __ sub(Gargs,        offset, Gargs);
never@2950:     __ sub(SP,    masked_offset, SP   );
never@2950:     return offset;
never@2950:   } else {
twisti@1858: #ifdef ASSERT
never@2950:     {
never@2950:       Label L_ok;
never@2950:       __ cmp(arg_slots.as_register(), 0);
never@2950:       __ br(Assembler::greaterEqual, false, Assembler::pt, L_ok);
never@2950:       __ delayed()->nop();
never@2950:       __ stop("negative arg_slots");
never@2950:       __ bind(L_ok);
never@2950:     }
twisti@1858: #endif
never@2950:     __ sll_ptr(arg_slots.as_register(), LogBytesPerWord, temp_reg);
never@2950:     __ add( temp_reg,  1*BytesPerWord,       temp2_reg);
never@2950:     __ andn(temp2_reg, TwoWordAlignmentMask, temp2_reg);
never@2950:     __ sub(Gargs, temp_reg,  Gargs);
never@2950:     __ sub(SP,    temp2_reg, SP   );
never@2950:     return temp_reg;
never@2950:   }
twisti@1858: }
twisti@1858: 
never@2950: static RegisterOrConstant adjust_SP_and_Gargs_up_by_slots(MacroAssembler* _masm,
never@2950:                                                           RegisterOrConstant arg_slots,
never@2950:                                                           Register temp_reg, Register temp2_reg) {
never@2950:   // Keep the stack pointer 2*wordSize aligned.
never@2950:   const int TwoWordAlignmentMask = right_n_bits(LogBytesPerWord + 1);
never@2950:   if (arg_slots.is_constant()) {
never@2950:     const int        offset = arg_slots.as_constant() << LogBytesPerWord;
never@2950:     const int masked_offset = offset & ~TwoWordAlignmentMask;
never@2950:     __ add(Gargs,        offset, Gargs);
never@2950:     __ add(SP,    masked_offset, SP   );
never@2950:     return offset;
never@2950:   } else {
never@2950:     __ sll_ptr(arg_slots.as_register(), LogBytesPerWord, temp_reg);
never@2950:     __ andn(temp_reg, TwoWordAlignmentMask, temp2_reg);
never@2950:     __ add(Gargs, temp_reg,  Gargs);
never@2950:     __ add(SP,    temp2_reg, SP   );
never@2950:     return temp_reg;
never@2950:   }
never@2950: }
twisti@1858: 
twisti@1858: // Helper to insert argument slots into the stack.
never@2950: // arg_slots must be a multiple of stack_move_unit() and < 0
never@2950: // argslot_reg is decremented to point to the new (shifted) location of the argslot
never@2950: // But, temp_reg ends up holding the original value of argslot_reg.
twisti@1858: void MethodHandles::insert_arg_slots(MacroAssembler* _masm,
twisti@1858:                                      RegisterOrConstant arg_slots,
twisti@1858:                                      Register argslot_reg,
twisti@1858:                                      Register temp_reg, Register temp2_reg, Register temp3_reg) {
never@2950:   // allow constant zero
never@2950:   if (arg_slots.is_constant() && arg_slots.as_constant() == 0)
never@2950:     return;
never@2950: 
twisti@1858:   assert_different_registers(argslot_reg, temp_reg, temp2_reg, temp3_reg,
twisti@1858:                              (!arg_slots.is_register() ? Gargs : arg_slots.as_register()));
twisti@1858: 
never@2950:   BLOCK_COMMENT("insert_arg_slots {");
never@2950:   if (VerifyMethodHandles)
never@2950:     verify_argslot(_masm, argslot_reg, temp_reg, "insertion point must fall within current frame");
never@2950:   if (VerifyMethodHandles)
never@2950:     verify_stack_move(_masm, arg_slots, -1);
twisti@1858: 
twisti@1858:   // Make space on the stack for the inserted argument(s).
twisti@1858:   // Then pull down everything shallower than argslot_reg.
twisti@1858:   // The stacked return address gets pulled down with everything else.
twisti@1858:   // That is, copy [sp, argslot) downward by -size words.  In pseudo-code:
twisti@1858:   //   sp -= size;
twisti@1858:   //   for (temp = sp + size; temp < argslot; temp++)
twisti@1858:   //     temp[-size] = temp[0]
twisti@1858:   //   argslot -= size;
twisti@1858: 
never@2950:   // offset is temp3_reg in case of arg_slots being a register.
never@2950:   RegisterOrConstant offset = adjust_SP_and_Gargs_up_by_slots(_masm, arg_slots, temp3_reg, temp_reg);
never@2950:   __ sub(Gargs, offset, temp_reg);  // source pointer for copy
twisti@1858: 
twisti@1858:   {
twisti@1858:     Label loop;
twisti@2204:     __ BIND(loop);
twisti@1858:     // pull one word down each time through the loop
never@2950:     __ ld_ptr(           Address(temp_reg, 0     ), temp2_reg);
never@2950:     __ st_ptr(temp2_reg, Address(temp_reg, offset)           );
twisti@1858:     __ add(temp_reg, wordSize, temp_reg);
twisti@1858:     __ cmp(temp_reg, argslot_reg);
never@2950:     __ brx(Assembler::lessUnsigned, false, Assembler::pt, loop);
twisti@1858:     __ delayed()->nop();  // FILLME
twisti@1858:   }
twisti@1858: 
twisti@1858:   // Now move the argslot down, to point to the opened-up space.
twisti@1858:   __ add(argslot_reg, offset, argslot_reg);
twisti@2204:   BLOCK_COMMENT("} insert_arg_slots");
twisti@1858: }
twisti@1858: 
twisti@1858: 
twisti@1858: // Helper to remove argument slots from the stack.
never@2950: // arg_slots must be a multiple of stack_move_unit() and > 0
twisti@1858: void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
twisti@1858:                                      RegisterOrConstant arg_slots,
twisti@1858:                                      Register argslot_reg,
twisti@1858:                                      Register temp_reg, Register temp2_reg, Register temp3_reg) {
never@2950:   // allow constant zero
never@2950:   if (arg_slots.is_constant() && arg_slots.as_constant() == 0)
never@2950:     return;
twisti@1858:   assert_different_registers(argslot_reg, temp_reg, temp2_reg, temp3_reg,
twisti@1858:                              (!arg_slots.is_register() ? Gargs : arg_slots.as_register()));
twisti@1858: 
never@2950:   BLOCK_COMMENT("remove_arg_slots {");
never@2950:   if (VerifyMethodHandles)
never@2950:     verify_argslots(_masm, arg_slots, argslot_reg, temp_reg, temp2_reg, false,
never@2950:                     "deleted argument(s) must fall within current frame");
never@2950:   if (VerifyMethodHandles)
never@2950:     verify_stack_move(_masm, arg_slots, +1);
twisti@1858: 
twisti@1858:   // Pull up everything shallower than argslot.
twisti@1858:   // Then remove the excess space on the stack.
twisti@1858:   // The stacked return address gets pulled up with everything else.
twisti@1858:   // That is, copy [sp, argslot) upward by size words.  In pseudo-code:
twisti@1858:   //   for (temp = argslot-1; temp >= sp; --temp)
twisti@1858:   //     temp[size] = temp[0]
twisti@1858:   //   argslot += size;
twisti@1858:   //   sp += size;
never@2950: 
never@2950:   RegisterOrConstant offset = __ regcon_sll_ptr(arg_slots, LogBytesPerWord, temp3_reg);
twisti@1858:   __ sub(argslot_reg, wordSize, temp_reg);  // source pointer for copy
never@2950: 
twisti@1858:   {
never@2950:     Label L_loop;
never@2950:     __ BIND(L_loop);
twisti@1858:     // pull one word up each time through the loop
never@2950:     __ ld_ptr(           Address(temp_reg, 0     ), temp2_reg);
never@2950:     __ st_ptr(temp2_reg, Address(temp_reg, offset)           );
twisti@1858:     __ sub(temp_reg, wordSize, temp_reg);
twisti@1858:     __ cmp(temp_reg, Gargs);
never@2950:     __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, L_loop);
twisti@1858:     __ delayed()->nop();  // FILLME
twisti@1858:   }
twisti@1858: 
twisti@1858:   // And adjust the argslot address to point at the deletion point.
twisti@1858:   __ add(argslot_reg, offset, argslot_reg);
twisti@1858: 
never@2950:   // We don't need the offset at this point anymore, just adjust SP and Gargs.
never@2950:   (void) adjust_SP_and_Gargs_up_by_slots(_masm, arg_slots, temp3_reg, temp_reg);
never@2950: 
twisti@2204:   BLOCK_COMMENT("} remove_arg_slots");
twisti@1858: }
twisti@1858: 
never@2950: // Helper to copy argument slots to the top of the stack.
never@2950: // The sequence starts with argslot_reg and is counted by slot_count
never@2950: // slot_count must be a multiple of stack_move_unit() and >= 0
never@2950: // This function blows the temps but does not change argslot_reg.
never@2950: void MethodHandles::push_arg_slots(MacroAssembler* _masm,
never@2950:                                    Register argslot_reg,
never@2950:                                    RegisterOrConstant slot_count,
never@2950:                                    Register temp_reg, Register temp2_reg) {
never@2950:   // allow constant zero
never@2950:   if (slot_count.is_constant() && slot_count.as_constant() == 0)
never@2950:     return;
never@2950:   assert_different_registers(argslot_reg, temp_reg, temp2_reg,
never@2950:                              (!slot_count.is_register() ? Gargs : slot_count.as_register()),
never@2950:                              SP);
never@2950:   assert(Interpreter::stackElementSize == wordSize, "else change this code");
never@2950: 
never@2950:   BLOCK_COMMENT("push_arg_slots {");
never@2950:   if (VerifyMethodHandles)
never@2950:     verify_stack_move(_masm, slot_count, 0);
never@2950: 
never@2950:   RegisterOrConstant offset = adjust_SP_and_Gargs_down_by_slots(_masm, slot_count, temp2_reg, temp_reg);
never@2950: 
never@2950:   if (slot_count.is_constant()) {
never@2950:     for (int i = slot_count.as_constant() - 1; i >= 0; i--) {
never@2950:       __ ld_ptr(          Address(argslot_reg, i * wordSize), temp_reg);
never@2950:       __ st_ptr(temp_reg, Address(Gargs,       i * wordSize));
never@2950:     }
never@2950:   } else {
never@2950:     Label L_plural, L_loop, L_break;
never@2950:     // Emit code to dynamically check for the common cases, zero and one slot.
never@2950:     __ cmp(slot_count.as_register(), (int32_t) 1);
never@2950:     __ br(Assembler::greater, false, Assembler::pn, L_plural);
never@2950:     __ delayed()->nop();
never@2950:     __ br(Assembler::less, false, Assembler::pn, L_break);
never@2950:     __ delayed()->nop();
never@2950:     __ ld_ptr(          Address(argslot_reg, 0), temp_reg);
never@2950:     __ st_ptr(temp_reg, Address(Gargs,       0));
never@2950:     __ ba(false, L_break);
never@2950:     __ delayed()->nop();  // FILLME
never@2950:     __ BIND(L_plural);
never@2950: 
never@2950:     // Loop for 2 or more:
never@2950:     //   top = &argslot[slot_count]
never@2950:     //   while (top > argslot)  *(--Gargs) = *(--top)
never@2950:     Register top_reg = temp_reg;
never@2950:     __ add(argslot_reg, offset, top_reg);
never@2950:     __ add(Gargs,       offset, Gargs  );  // move back up again so we can go down
never@2950:     __ BIND(L_loop);
never@2950:     __ sub(top_reg, wordSize, top_reg);
never@2950:     __ sub(Gargs,   wordSize, Gargs  );
never@2950:     __ ld_ptr(           Address(top_reg, 0), temp2_reg);
never@2950:     __ st_ptr(temp2_reg, Address(Gargs,   0));
never@2950:     __ cmp(top_reg, argslot_reg);
never@2950:     __ brx(Assembler::greaterUnsigned, false, Assembler::pt, L_loop);
never@2950:     __ delayed()->nop();  // FILLME
never@2950:     __ BIND(L_break);
never@2950:   }
never@2950:   BLOCK_COMMENT("} push_arg_slots");
never@2950: }
never@2950: 
never@2950: // in-place movement; no change to Gargs
never@2950: // blows temp_reg, temp2_reg
never@2950: void MethodHandles::move_arg_slots_up(MacroAssembler* _masm,
never@2950:                                       Register bottom_reg,  // invariant
never@2950:                                       Address  top_addr,    // can use temp_reg
never@2950:                                       RegisterOrConstant positive_distance_in_slots,  // destroyed if register
never@2950:                                       Register temp_reg, Register temp2_reg) {
never@2950:   assert_different_registers(bottom_reg,
never@2950:                              temp_reg, temp2_reg,
never@2950:                              positive_distance_in_slots.register_or_noreg());
never@2950:   BLOCK_COMMENT("move_arg_slots_up {");
never@2950:   Label L_loop, L_break;
never@2950:   Register top_reg = temp_reg;
never@2950:   if (!top_addr.is_same_address(Address(top_reg, 0))) {
never@2950:     __ add(top_addr, top_reg);
never@2950:   }
never@2950:   // Detect empty (or broken) loop:
never@2950: #ifdef ASSERT
never@2950:   if (VerifyMethodHandles) {
never@2950:     // Verify that &bottom < &top (non-empty interval)
never@2950:     Label L_ok, L_bad;
never@2950:     if (positive_distance_in_slots.is_register()) {
never@2950:       __ cmp(positive_distance_in_slots.as_register(), (int32_t) 0);
never@2950:       __ br(Assembler::lessEqual, false, Assembler::pn, L_bad);
never@2950:       __ delayed()->nop();
never@2950:     }
never@2950:     __ cmp(bottom_reg, top_reg);
never@2950:     __ brx(Assembler::lessUnsigned, false, Assembler::pt, L_ok);
never@2950:     __ delayed()->nop();
never@2950:     __ BIND(L_bad);
never@2950:     __ stop("valid bounds (copy up)");
never@2950:     __ BIND(L_ok);
never@2950:   }
never@2950: #endif
never@2950:   __ cmp(bottom_reg, top_reg);
never@2950:   __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pn, L_break);
never@2950:   __ delayed()->nop();
never@2950:   // work top down to bottom, copying contiguous data upwards
never@2950:   // In pseudo-code:
never@2950:   //   while (--top >= bottom) *(top + distance) = *(top + 0);
never@2950:   RegisterOrConstant offset = __ argument_offset(positive_distance_in_slots, positive_distance_in_slots.register_or_noreg());
never@2950:   __ BIND(L_loop);
never@2950:   __ sub(top_reg, wordSize, top_reg);
never@2950:   __ ld_ptr(           Address(top_reg, 0     ), temp2_reg);
never@2950:   __ st_ptr(temp2_reg, Address(top_reg, offset)           );
never@2950:   __ cmp(top_reg, bottom_reg);
never@2950:   __ brx(Assembler::greaterUnsigned, false, Assembler::pt, L_loop);
never@2950:   __ delayed()->nop();  // FILLME
never@2950:   assert(Interpreter::stackElementSize == wordSize, "else change loop");
never@2950:   __ BIND(L_break);
never@2950:   BLOCK_COMMENT("} move_arg_slots_up");
never@2950: }
never@2950: 
never@2950: // in-place movement; no change to rsp
never@2950: // blows temp_reg, temp2_reg
never@2950: void MethodHandles::move_arg_slots_down(MacroAssembler* _masm,
never@2950:                                         Address  bottom_addr,  // can use temp_reg
never@2950:                                         Register top_reg,      // invariant
never@2950:                                         RegisterOrConstant negative_distance_in_slots,  // destroyed if register
never@2950:                                         Register temp_reg, Register temp2_reg) {
never@2950:   assert_different_registers(top_reg,
never@2950:                              negative_distance_in_slots.register_or_noreg(),
never@2950:                              temp_reg, temp2_reg);
never@2950:   BLOCK_COMMENT("move_arg_slots_down {");
never@2950:   Label L_loop, L_break;
never@2950:   Register bottom_reg = temp_reg;
never@2950:   if (!bottom_addr.is_same_address(Address(bottom_reg, 0))) {
never@2950:     __ add(bottom_addr, bottom_reg);
never@2950:   }
never@2950:   // Detect empty (or broken) loop:
never@2950: #ifdef ASSERT
never@2950:   assert(!negative_distance_in_slots.is_constant() || negative_distance_in_slots.as_constant() < 0, "");
never@2950:   if (VerifyMethodHandles) {
never@2950:     // Verify that &bottom < &top (non-empty interval)
never@2950:     Label L_ok, L_bad;
never@2950:     if (negative_distance_in_slots.is_register()) {
never@2950:       __ cmp(negative_distance_in_slots.as_register(), (int32_t) 0);
never@2950:       __ br(Assembler::greaterEqual, false, Assembler::pn, L_bad);
never@2950:       __ delayed()->nop();
never@2950:     }
never@2950:     __ cmp(bottom_reg, top_reg);
never@2950:     __ brx(Assembler::lessUnsigned, false, Assembler::pt, L_ok);
never@2950:     __ delayed()->nop();
never@2950:     __ BIND(L_bad);
never@2950:     __ stop("valid bounds (copy down)");
never@2950:     __ BIND(L_ok);
never@2950:   }
never@2950: #endif
never@2950:   __ cmp(bottom_reg, top_reg);
never@2950:   __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pn, L_break);
never@2950:   __ delayed()->nop();
never@2950:   // work bottom up to top, copying contiguous data downwards
never@2950:   // In pseudo-code:
never@2950:   //   while (bottom < top) *(bottom - distance) = *(bottom + 0), bottom++;
never@2950:   RegisterOrConstant offset = __ argument_offset(negative_distance_in_slots, negative_distance_in_slots.register_or_noreg());
never@2950:   __ BIND(L_loop);
never@2950:   __ ld_ptr(           Address(bottom_reg, 0     ), temp2_reg);
never@2950:   __ st_ptr(temp2_reg, Address(bottom_reg, offset)           );
never@2950:   __ add(bottom_reg, wordSize, bottom_reg);
never@2950:   __ cmp(bottom_reg, top_reg);
never@2950:   __ brx(Assembler::lessUnsigned, false, Assembler::pt, L_loop);
never@2950:   __ delayed()->nop();  // FILLME
never@2950:   assert(Interpreter::stackElementSize == wordSize, "else change loop");
never@2950:   __ BIND(L_break);
never@2950:   BLOCK_COMMENT("} move_arg_slots_down");
never@2950: }
never@2950: 
never@2950: // Copy from a field or array element to a stacked argument slot.
never@2950: // is_element (ignored) says whether caller is loading an array element instead of an instance field.
never@2950: void MethodHandles::move_typed_arg(MacroAssembler* _masm,
never@2950:                                    BasicType type, bool is_element,
never@2950:                                    Address value_src, Address slot_dest,
never@2950:                                    Register temp_reg) {
never@2950:   assert(!slot_dest.uses(temp_reg), "must be different register");
never@2950:   BLOCK_COMMENT(!is_element ? "move_typed_arg {" : "move_typed_arg { (array element)");
never@2950:   if (type == T_OBJECT || type == T_ARRAY) {
never@2950:     __ load_heap_oop(value_src, temp_reg);
never@2950:     __ verify_oop(temp_reg);
never@2950:     __ st_ptr(temp_reg, slot_dest);
never@2950:   } else if (type != T_VOID) {
never@2950:     int  arg_size      = type2aelembytes(type);
never@2950:     bool arg_is_signed = is_signed_subword_type(type);
never@2950:     int  slot_size     = is_subword_type(type) ? type2aelembytes(T_INT) : arg_size;  // store int sub-words as int
never@2950:     __ load_sized_value( value_src, temp_reg, arg_size, arg_is_signed);
never@2950:     __ store_sized_value(temp_reg, slot_dest, slot_size              );
never@2950:   }
never@2950:   BLOCK_COMMENT("} move_typed_arg");
never@2950: }
never@2950: 
never@2950: // Cf. TemplateInterpreterGenerator::generate_return_entry_for and
never@2950: // InterpreterMacroAssembler::save_return_value
never@2950: void MethodHandles::move_return_value(MacroAssembler* _masm, BasicType type,
never@2950:                                       Address return_slot) {
never@2950:   BLOCK_COMMENT("move_return_value {");
never@2950:   // Look at the type and pull the value out of the corresponding register.
never@2950:   if (type == T_VOID) {
never@2950:     // nothing to do
never@2950:   } else if (type == T_OBJECT) {
never@2950:     __ verify_oop(O0);
never@2950:     __ st_ptr(O0, return_slot);
never@2950:   } else if (type == T_INT || is_subword_type(type)) {
never@2950:     int type_size = type2aelembytes(T_INT);
never@2950:     __ store_sized_value(O0, return_slot, type_size);
never@2950:   } else if (type == T_LONG) {
never@2950:     // store the value by parts
never@2950:     // Note: We assume longs are continguous (if misaligned) on the interpreter stack.
never@2950: #if !defined(_LP64) && defined(COMPILER2)
never@2950:     __ stx(G1, return_slot);
never@2950: #else
never@2950:   #ifdef _LP64
never@2950:     __ stx(O0, return_slot);
never@2950:   #else
never@2950:     if (return_slot.has_disp()) {
never@2950:       // The displacement is a constant
never@2950:       __ st(O0, return_slot);
never@2950:       __ st(O1, return_slot.plus_disp(Interpreter::stackElementSize));
never@2950:     } else {
never@2950:       __ std(O0, return_slot);
never@2950:     }
never@2950:   #endif
never@2950: #endif
never@2950:   } else if (type == T_FLOAT) {
never@2950:     __ stf(FloatRegisterImpl::S, Ftos_f, return_slot);
never@2950:   } else if (type == T_DOUBLE) {
never@2950:     __ stf(FloatRegisterImpl::D, Ftos_f, return_slot);
never@2950:   } else {
never@2950:     ShouldNotReachHere();
never@2950:   }
never@2950:   BLOCK_COMMENT("} move_return_value");
never@2950: }
twisti@1858: 
twisti@1858: #ifndef PRODUCT
twisti@1858: extern "C" void print_method_handle(oop mh);
twisti@1858: void trace_method_handle_stub(const char* adaptername,
never@2868:                               oopDesc* mh,
never@2868:                               intptr_t* saved_sp) {
never@2950:   bool has_mh = (strstr(adaptername, "return/") == NULL);  // return adapters don't have mh
never@2868:   tty->print_cr("MH %s mh="INTPTR_FORMAT " saved_sp=" INTPTR_FORMAT, adaptername, (intptr_t) mh, saved_sp);
never@2950:   if (has_mh)
never@2950:     print_method_handle(mh);
twisti@1858: }
twisti@2204: void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) {
twisti@2204:   if (!TraceMethodHandles)  return;
twisti@2204:   BLOCK_COMMENT("trace_method_handle {");
twisti@2204:   // save: Gargs, O5_savedSP
twisti@2204:   __ save_frame(16);
twisti@2204:   __ set((intptr_t) adaptername, O0);
twisti@2204:   __ mov(G3_method_handle, O1);
never@2868:   __ mov(I5_savedSP, O2);
twisti@2204:   __ mov(G3_method_handle, L3);
twisti@2204:   __ mov(Gargs, L4);
twisti@2204:   __ mov(G5_method_type, L5);
twisti@2204:   __ call_VM_leaf(L7, CAST_FROM_FN_PTR(address, trace_method_handle_stub));
twisti@2204: 
twisti@2204:   __ mov(L3, G3_method_handle);
twisti@2204:   __ mov(L4, Gargs);
twisti@2204:   __ mov(L5, G5_method_type);
twisti@2204:   __ restore();
twisti@2204:   BLOCK_COMMENT("} trace_method_handle");
twisti@2204: }
twisti@1858: #endif // PRODUCT
twisti@1858: 
jrose@1862: // which conversion op types are implemented here?
jrose@1862: int MethodHandles::adapter_conversion_ops_supported_mask() {
jrose@2639:   return ((1<<java_lang_invoke_AdapterMethodHandle::OP_RETYPE_ONLY)
jrose@2639:          |(1<<java_lang_invoke_AdapterMethodHandle::OP_RETYPE_RAW)
jrose@2639:          |(1<<java_lang_invoke_AdapterMethodHandle::OP_CHECK_CAST)
jrose@2639:          |(1<<java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_PRIM)
jrose@2639:          |(1<<java_lang_invoke_AdapterMethodHandle::OP_REF_TO_PRIM)
never@2950:           // OP_PRIM_TO_REF is below...
jrose@2639:          |(1<<java_lang_invoke_AdapterMethodHandle::OP_SWAP_ARGS)
jrose@2639:          |(1<<java_lang_invoke_AdapterMethodHandle::OP_ROT_ARGS)
jrose@2639:          |(1<<java_lang_invoke_AdapterMethodHandle::OP_DUP_ARGS)
jrose@2639:          |(1<<java_lang_invoke_AdapterMethodHandle::OP_DROP_ARGS)
never@2950:           // OP_COLLECT_ARGS is below...
never@2950:          |(1<<java_lang_invoke_AdapterMethodHandle::OP_SPREAD_ARGS)
never@2950:          |(!UseRicochetFrames ? 0 :
never@2950:            java_lang_invoke_MethodTypeForm::vmlayout_offset_in_bytes() <= 0 ? 0 :
never@2950:            ((1<<java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_REF)
never@2950:            |(1<<java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS)
never@2950:            |(1<<java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS)
never@2950:            )
never@2950:           )
jrose@1862:          );
jrose@1862: }
twisti@1858: 
twisti@1858: //------------------------------------------------------------------------------
twisti@1858: // MethodHandles::generate_method_handle_stub
twisti@1858: //
jrose@1145: // Generate an "entry" field for a method handle.
jrose@1145: // This determines how the method handle will respond to calls.
twisti@2436: void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
never@2950:   MethodHandles::EntryKind ek_orig = ek_original_kind(ek);
never@2950: 
twisti@1858:   // Here is the register state during an interpreted call,
twisti@1858:   // as set up by generate_method_handle_interpreter_entry():
twisti@1858:   // - G5: garbage temp (was MethodHandle.invoke methodOop, unused)
twisti@1858:   // - G3: receiver method handle
twisti@1858:   // - O5_savedSP: sender SP (must preserve)
twisti@1858: 
never@2950:   const Register O0_scratch = O0;
twisti@2411:   const Register O1_scratch = O1;
twisti@2411:   const Register O2_scratch = O2;
twisti@2411:   const Register O3_scratch = O3;
never@2950:   const Register O4_scratch = O4;
never@2950:   const Register G5_scratch = G5;
twisti@2411: 
never@2950:   // Often used names:
never@2950:   const Register O0_argslot = O0;
never@2950: 
never@2950:   // Argument registers for _raise_exception:
twisti@2411:   const Register O0_code     = O0;
twisti@2411:   const Register O1_actual   = O1;
twisti@2411:   const Register O2_required = O2;
twisti@1858: 
jrose@2639:   guarantee(java_lang_invoke_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
twisti@1858: 
twisti@1858:   // Some handy addresses:
twisti@1858:   Address G5_method_fie(    G5_method,        in_bytes(methodOopDesc::from_interpreted_offset()));
twisti@2603:   Address G5_method_fce(    G5_method,        in_bytes(methodOopDesc::from_compiled_offset()));
twisti@1858: 
jrose@2639:   Address G3_mh_vmtarget(   G3_method_handle, java_lang_invoke_MethodHandle::vmtarget_offset_in_bytes());
twisti@1858: 
jrose@2639:   Address G3_dmh_vmindex(   G3_method_handle, java_lang_invoke_DirectMethodHandle::vmindex_offset_in_bytes());
twisti@1858: 
jrose@2639:   Address G3_bmh_vmargslot( G3_method_handle, java_lang_invoke_BoundMethodHandle::vmargslot_offset_in_bytes());
jrose@2639:   Address G3_bmh_argument(  G3_method_handle, java_lang_invoke_BoundMethodHandle::argument_offset_in_bytes());
twisti@1858: 
jrose@2639:   Address G3_amh_vmargslot( G3_method_handle, java_lang_invoke_AdapterMethodHandle::vmargslot_offset_in_bytes());
jrose@2639:   Address G3_amh_argument ( G3_method_handle, java_lang_invoke_AdapterMethodHandle::argument_offset_in_bytes());
jrose@2639:   Address G3_amh_conversion(G3_method_handle, java_lang_invoke_AdapterMethodHandle::conversion_offset_in_bytes());
twisti@1858: 
twisti@1858:   const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
twisti@1858: 
twisti@1858:   if (have_entry(ek)) {
twisti@1858:     __ nop();  // empty stubs make SG sick
twisti@1858:     return;
twisti@1858:   }
twisti@1858: 
twisti@1858:   address interp_entry = __ pc();
twisti@1858: 
twisti@2204:   trace_method_handle(_masm, entry_name(ek));
twisti@1858: 
never@2950:   BLOCK_COMMENT(err_msg("Entry %s {", entry_name(ek)));
never@2950: 
twisti@1858:   switch ((int) ek) {
twisti@1858:   case _raise_exception:
twisti@1858:     {
twisti@1858:       // Not a real MH entry, but rather shared code for raising an
twisti@2603:       // exception.  Since we use the compiled entry, arguments are
twisti@2603:       // expected in compiler argument registers.
twisti@2436:       assert(raise_exception_method(), "must be set");
twisti@2603:       assert(raise_exception_method()->from_compiled_entry(), "method must be linked");
twisti@1858: 
twisti@1858:       __ mov(O5_savedSP, SP);  // Cut the stack back to where the caller started.
twisti@1858: 
twisti@2411:       Label L_no_method;
jrose@2639:       // FIXME: fill in _raise_exception_method with a suitable java.lang.invoke method
twisti@1858:       __ set(AddressLiteral((address) &_raise_exception_method), G5_method);
twisti@1858:       __ ld_ptr(Address(G5_method, 0), G5_method);
twisti@1858:       __ tst(G5_method);
twisti@2411:       __ brx(Assembler::zero, false, Assembler::pn, L_no_method);
twisti@1858:       __ delayed()->nop();
twisti@1858: 
twisti@2411:       const int jobject_oop_offset = 0;
twisti@1858:       __ ld_ptr(Address(G5_method, jobject_oop_offset), G5_method);
twisti@1858:       __ tst(G5_method);
twisti@2411:       __ brx(Assembler::zero, false, Assembler::pn, L_no_method);
twisti@1858:       __ delayed()->nop();
twisti@1858: 
twisti@1858:       __ verify_oop(G5_method);
twisti@2603:       __ jump_indirect_to(G5_method_fce, O3_scratch);  // jump to compiled entry
twisti@1858:       __ delayed()->nop();
twisti@1858: 
twisti@1858:       // Do something that is at least causes a valid throw from the interpreter.
twisti@2411:       __ bind(L_no_method);
twisti@2411:       __ unimplemented("call throw_WrongMethodType_entry");
twisti@1858:     }
twisti@1858:     break;
twisti@1858: 
twisti@1858:   case _invokestatic_mh:
twisti@1858:   case _invokespecial_mh:
twisti@1858:     {
twisti@2201:       __ load_heap_oop(G3_mh_vmtarget, G5_method);  // target is a methodOop
twisti@1858:       __ verify_oop(G5_method);
twisti@1858:       // Same as TemplateTable::invokestatic or invokespecial,
twisti@1858:       // minus the CP setup and profiling:
twisti@1858:       if (ek == _invokespecial_mh) {
twisti@1858:         // Must load & check the first argument before entering the target method.
twisti@1858:         __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
never@2950:         __ ld_ptr(__ argument_address(O0_argslot, O0_argslot, -1), G3_method_handle);
twisti@1858:         __ null_check(G3_method_handle);
twisti@1858:         __ verify_oop(G3_method_handle);
twisti@1858:       }
twisti@1858:       __ jump_indirect_to(G5_method_fie, O1_scratch);
twisti@1858:       __ delayed()->nop();
twisti@1858:     }
twisti@1858:     break;
twisti@1858: 
twisti@1858:   case _invokevirtual_mh:
twisti@1858:     {
twisti@1858:       // Same as TemplateTable::invokevirtual,
twisti@1858:       // minus the CP setup and profiling:
twisti@1858: 
twisti@1858:       // Pick out the vtable index and receiver offset from the MH,
twisti@1858:       // and then we can discard it:
never@2950:       Register O2_index = O2_scratch;
twisti@1858:       __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
never@2950:       __ ldsw(G3_dmh_vmindex, O2_index);
twisti@1858:       // Note:  The verifier allows us to ignore G3_mh_vmtarget.
never@2950:       __ ld_ptr(__ argument_address(O0_argslot, O0_argslot, -1), G3_method_handle);
twisti@1858:       __ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
twisti@1858: 
twisti@1858:       // Get receiver klass:
twisti@1858:       Register O0_klass = O0_argslot;
twisti@1858:       __ load_klass(G3_method_handle, O0_klass);
twisti@1858:       __ verify_oop(O0_klass);
twisti@1858: 
twisti@1858:       // Get target methodOop & entry point:
twisti@1858:       const int base = instanceKlass::vtable_start_offset() * wordSize;
twisti@1858:       assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
twisti@1858: 
never@2950:       __ sll_ptr(O2_index, LogBytesPerWord, O2_index);
never@2950:       __ add(O0_klass, O2_index, O0_klass);
twisti@1858:       Address vtable_entry_addr(O0_klass, base + vtableEntry::method_offset_in_bytes());
twisti@1858:       __ ld_ptr(vtable_entry_addr, G5_method);
twisti@1858: 
twisti@1858:       __ verify_oop(G5_method);
twisti@1858:       __ jump_indirect_to(G5_method_fie, O1_scratch);
twisti@1858:       __ delayed()->nop();
twisti@1858:     }
twisti@1858:     break;
twisti@1858: 
twisti@1858:   case _invokeinterface_mh:
twisti@1858:     {
twisti@1858:       // Same as TemplateTable::invokeinterface,
twisti@1858:       // minus the CP setup and profiling:
twisti@1858:       __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
twisti@1858:       Register O1_intf  = O1_scratch;
never@2950:       Register G5_index = G5_scratch;
twisti@2201:       __ load_heap_oop(G3_mh_vmtarget, O1_intf);
twisti@1858:       __ ldsw(G3_dmh_vmindex, G5_index);
never@2950:       __ ld_ptr(__ argument_address(O0_argslot, O0_argslot, -1), G3_method_handle);
twisti@1858:       __ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
twisti@1858: 
twisti@1858:       // Get receiver klass:
twisti@1858:       Register O0_klass = O0_argslot;
twisti@1858:       __ load_klass(G3_method_handle, O0_klass);
twisti@1858:       __ verify_oop(O0_klass);
twisti@1858: 
twisti@1858:       // Get interface:
twisti@1858:       Label no_such_interface;
twisti@1858:       __ verify_oop(O1_intf);
twisti@1858:       __ lookup_interface_method(O0_klass, O1_intf,
twisti@1858:                                  // Note: next two args must be the same:
twisti@1858:                                  G5_index, G5_method,
twisti@1858:                                  O2_scratch,
twisti@1858:                                  O3_scratch,
twisti@1858:                                  no_such_interface);
twisti@1858: 
twisti@1858:       __ verify_oop(G5_method);
twisti@1858:       __ jump_indirect_to(G5_method_fie, O1_scratch);
twisti@1858:       __ delayed()->nop();
twisti@1858: 
twisti@1858:       __ bind(no_such_interface);
twisti@1858:       // Throw an exception.
twisti@1858:       // For historical reasons, it will be IncompatibleClassChangeError.
twisti@1858:       __ unimplemented("not tested yet");
twisti@2411:       __ ld_ptr(Address(O1_intf, java_mirror_offset), O2_required);  // required interface
twisti@2411:       __ mov(   O0_klass,                             O1_actual);    // bad receiver
twisti@2411:       __ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O3_scratch);
twisti@2411:       __ delayed()->mov(Bytecodes::_invokeinterface,  O0_code);      // who is complaining?
twisti@1858:     }
twisti@1858:     break;
twisti@1858: 
twisti@1858:   case _bound_ref_mh:
twisti@1858:   case _bound_int_mh:
twisti@1858:   case _bound_long_mh:
twisti@1858:   case _bound_ref_direct_mh:
twisti@1858:   case _bound_int_direct_mh:
twisti@1858:   case _bound_long_direct_mh:
twisti@1858:     {
twisti@1858:       const bool direct_to_method = (ek >= _bound_ref_direct_mh);
never@2950:       BasicType arg_type  = ek_bound_mh_arg_type(ek);
never@2950:       int       arg_slots = type2size[arg_type];
twisti@1858: 
twisti@1858:       // Make room for the new argument:
never@2950:       load_vmargslot(_masm, G3_bmh_vmargslot, O0_argslot);
never@2950:       __ add(__ argument_address(O0_argslot, O0_argslot), O0_argslot);
twisti@1858: 
never@2950:       insert_arg_slots(_masm, arg_slots * stack_move_unit(), O0_argslot, O1_scratch, O2_scratch, O3_scratch);
twisti@1858: 
twisti@1858:       // Store bound argument into the new stack slot:
twisti@2201:       __ load_heap_oop(G3_bmh_argument, O1_scratch);
twisti@1858:       if (arg_type == T_OBJECT) {
twisti@1858:         __ st_ptr(O1_scratch, Address(O0_argslot, 0));
twisti@1858:       } else {
twisti@1858:         Address prim_value_addr(O1_scratch, java_lang_boxing_object::value_offset_in_bytes(arg_type));
never@2950:         move_typed_arg(_masm, arg_type, false,
never@2950:                        prim_value_addr,
never@2950:                        Address(O0_argslot, 0),
never@2950:                        O2_scratch);  // must be an even register for !_LP64 long moves (uses O2/O3)
twisti@1858:       }
twisti@1858: 
twisti@1858:       if (direct_to_method) {
twisti@2201:         __ load_heap_oop(G3_mh_vmtarget, G5_method);  // target is a methodOop
twisti@1858:         __ verify_oop(G5_method);
twisti@1858:         __ jump_indirect_to(G5_method_fie, O1_scratch);
twisti@1858:         __ delayed()->nop();
twisti@1858:       } else {
twisti@2201:         __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);  // target is a methodOop
twisti@1858:         __ verify_oop(G3_method_handle);
twisti@1858:         __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858:       }
twisti@1858:     }
twisti@1858:     break;
twisti@1858: 
twisti@1858:   case _adapter_retype_only:
twisti@1858:   case _adapter_retype_raw:
twisti@1858:     // Immediately jump to the next MH layer:
twisti@2201:     __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
never@2950:     __ verify_oop(G3_method_handle);
twisti@1858:     __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858:     // This is OK when all parameter types widen.
twisti@1858:     // It is also OK when a return type narrows.
twisti@1858:     break;
twisti@1858: 
twisti@1858:   case _adapter_check_cast:
twisti@1858:     {
twisti@1858:       // Check a reference argument before jumping to the next layer of MH:
never@2950:       load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
never@2950:       Address vmarg = __ argument_address(O0_argslot, O0_argslot);
twisti@1858: 
twisti@1858:       // What class are we casting to?
never@2950:       Register O1_klass = O1_scratch;  // Interesting AMH data.
never@2950:       __ load_heap_oop(G3_amh_argument, O1_klass);  // This is a Class object!
never@2950:       load_klass_from_Class(_masm, O1_klass, O2_scratch, O3_scratch);
twisti@1858: 
never@2950:       Label L_done;
never@2950:       __ ld_ptr(vmarg, O2_scratch);
never@2950:       __ tst(O2_scratch);
never@2950:       __ brx(Assembler::zero, false, Assembler::pn, L_done);  // No cast if null.
twisti@1858:       __ delayed()->nop();
never@2950:       __ load_klass(O2_scratch, O2_scratch);
twisti@1858: 
twisti@1858:       // Live at this point:
twisti@2874:       // - O0_argslot      :  argslot index in vmarg; may be required in the failing path
never@2950:       // - O1_klass        :  klass required by the target method
never@2950:       // - O2_scratch      :  argument klass to test
twisti@1858:       // - G3_method_handle:  adapter method handle
never@2950:       __ check_klass_subtype(O2_scratch, O1_klass, O3_scratch, O4_scratch, L_done);
twisti@1858: 
twisti@1858:       // If we get here, the type check failed!
twisti@2411:       __ load_heap_oop(G3_amh_argument,        O2_required);  // required class
twisti@2411:       __ ld_ptr(       vmarg,                  O1_actual);    // bad object
twisti@2411:       __ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O3_scratch);
twisti@2411:       __ delayed()->mov(Bytecodes::_checkcast, O0_code);      // who is complaining?
twisti@1858: 
never@2950:       __ BIND(L_done);
twisti@1858:       // Get the new MH:
twisti@2201:       __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
twisti@1858:       __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858:     }
twisti@1858:     break;
twisti@1858: 
twisti@1858:   case _adapter_prim_to_prim:
twisti@1858:   case _adapter_ref_to_prim:
twisti@1858:     // Handled completely by optimized cases.
twisti@1858:     __ stop("init_AdapterMethodHandle should not issue this");
twisti@1858:     break;
twisti@1858: 
twisti@1858:   case _adapter_opt_i2i:        // optimized subcase of adapt_prim_to_prim
twisti@1858: //case _adapter_opt_f2i:        // optimized subcase of adapt_prim_to_prim
twisti@1858:   case _adapter_opt_l2i:        // optimized subcase of adapt_prim_to_prim
twisti@1858:   case _adapter_opt_unboxi:     // optimized subcase of adapt_ref_to_prim
twisti@1858:     {
twisti@1858:       // Perform an in-place conversion to int or an int subword.
never@2950:       load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
twisti@2351:       Address value;
never@2950:       Address vmarg;
twisti@1858:       bool value_left_justified = false;
twisti@1858: 
twisti@1858:       switch (ek) {
twisti@1858:       case _adapter_opt_i2i:
never@2950:         value = vmarg = __ argument_address(O0_argslot, O0_argslot);
twisti@2256:         break;
twisti@1858:       case _adapter_opt_l2i:
twisti@2256:         {
twisti@2256:           // just delete the extra slot
twisti@2351: #ifdef _LP64
twisti@2351:           // In V9, longs are given 2 64-bit slots in the interpreter, but the
twisti@2351:           // data is passed in only 1 slot.
twisti@2351:           // Keep the second slot.
never@2950:           __ add(__ argument_address(O0_argslot, O0_argslot, -1), O0_argslot);
twisti@2351:           remove_arg_slots(_masm, -stack_move_unit(), O0_argslot, O1_scratch, O2_scratch, O3_scratch);
twisti@2351:           value = Address(O0_argslot, 4);  // Get least-significant 32-bit of 64-bit value.
twisti@2351:           vmarg = Address(O0_argslot, Interpreter::stackElementSize);
twisti@2351: #else
twisti@2351:           // Keep the first slot.
never@2950:           __ add(__ argument_address(O0_argslot, O0_argslot), O0_argslot);
twisti@2256:           remove_arg_slots(_masm, -stack_move_unit(), O0_argslot, O1_scratch, O2_scratch, O3_scratch);
twisti@2351:           value = Address(O0_argslot, 0);
twisti@2351:           vmarg = value;
twisti@2351: #endif
twisti@2256:         }
twisti@1858:         break;
twisti@1858:       case _adapter_opt_unboxi:
twisti@1858:         {
never@2950:           vmarg = __ argument_address(O0_argslot, O0_argslot);
twisti@1858:           // Load the value up from the heap.
twisti@1858:           __ ld_ptr(vmarg, O1_scratch);
twisti@1858:           int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
twisti@1858: #ifdef ASSERT
twisti@1858:           for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
twisti@1858:             if (is_subword_type(BasicType(bt)))
twisti@1858:               assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
twisti@1858:           }
twisti@1858: #endif
twisti@1858:           __ null_check(O1_scratch, value_offset);
twisti@1858:           value = Address(O1_scratch, value_offset);
twisti@1858: #ifdef _BIG_ENDIAN
twisti@1858:           // Values stored in objects are packed.
twisti@1858:           value_left_justified = true;
twisti@1858: #endif
twisti@1858:         }
twisti@1858:         break;
twisti@1858:       default:
twisti@1858:         ShouldNotReachHere();
twisti@1858:       }
twisti@1858: 
twisti@1858:       // This check is required on _BIG_ENDIAN
never@2950:       Register G5_vminfo = G5_scratch;
twisti@1858:       __ ldsw(G3_amh_conversion, G5_vminfo);
twisti@1858:       assert(CONV_VMINFO_SHIFT == 0, "preshifted");
twisti@1858: 
twisti@1858:       // Original 32-bit vmdata word must be of this form:
twisti@1858:       // | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
twisti@1858:       __ lduw(value, O1_scratch);
twisti@1858:       if (!value_left_justified)
twisti@1858:         __ sll(O1_scratch, G5_vminfo, O1_scratch);
twisti@1858:       Label zero_extend, done;
twisti@1858:       __ btst(CONV_VMINFO_SIGN_FLAG, G5_vminfo);
twisti@1858:       __ br(Assembler::zero, false, Assembler::pn, zero_extend);
twisti@1858:       __ delayed()->nop();
twisti@1858: 
twisti@1858:       // this path is taken for int->byte, int->short
twisti@1858:       __ sra(O1_scratch, G5_vminfo, O1_scratch);
twisti@1858:       __ ba(false, done);
twisti@1858:       __ delayed()->nop();
twisti@1858: 
twisti@1858:       __ bind(zero_extend);
twisti@1858:       // this is taken for int->char
twisti@1858:       __ srl(O1_scratch, G5_vminfo, O1_scratch);
twisti@1858: 
twisti@1858:       __ bind(done);
twisti@1858:       __ st(O1_scratch, vmarg);
twisti@1858: 
twisti@1858:       // Get the new MH:
twisti@2201:       __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
twisti@1858:       __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858:     }
twisti@1858:     break;
twisti@1858: 
twisti@1858:   case _adapter_opt_i2l:        // optimized subcase of adapt_prim_to_prim
twisti@1858:   case _adapter_opt_unboxl:     // optimized subcase of adapt_ref_to_prim
twisti@1858:     {
twisti@1858:       // Perform an in-place int-to-long or ref-to-long conversion.
never@2950:       load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
twisti@1858: 
twisti@1858:       // On big-endian machine we duplicate the slot and store the MSW
twisti@1858:       // in the first slot.
never@2950:       __ add(__ argument_address(O0_argslot, O0_argslot, 1), O0_argslot);
twisti@1858: 
never@2950:       insert_arg_slots(_masm, stack_move_unit(), O0_argslot, O1_scratch, O2_scratch, O3_scratch);
twisti@1858: 
twisti@1858:       Address arg_lsw(O0_argslot, 0);
twisti@1861:       Address arg_msw(O0_argslot, -Interpreter::stackElementSize);
twisti@1858: 
twisti@1858:       switch (ek) {
twisti@1858:       case _adapter_opt_i2l:
twisti@1858:         {
twisti@2664: #ifdef _LP64
twisti@2664:           __ ldsw(arg_lsw, O2_scratch);                 // Load LSW sign-extended
twisti@2664: #else
twisti@2664:           __ ldsw(arg_lsw, O3_scratch);                 // Load LSW sign-extended
twisti@2664:           __ srlx(O3_scratch, BitsPerInt, O2_scratch);  // Move MSW value to lower 32-bits for std
twisti@2664: #endif
twisti@2664:           __ st_long(O2_scratch, arg_msw);              // Uses O2/O3 on !_LP64
twisti@1858:         }
twisti@1858:         break;
twisti@1858:       case _adapter_opt_unboxl:
twisti@1858:         {
twisti@1858:           // Load the value up from the heap.
twisti@1858:           __ ld_ptr(arg_lsw, O1_scratch);
twisti@1858:           int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
twisti@1858:           assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
twisti@1858:           __ null_check(O1_scratch, value_offset);
twisti@1858:           __ ld_long(Address(O1_scratch, value_offset), O2_scratch);  // Uses O2/O3 on !_LP64
twisti@1858:           __ st_long(O2_scratch, arg_msw);
twisti@1858:         }
twisti@1858:         break;
twisti@1858:       default:
twisti@1858:         ShouldNotReachHere();
twisti@1858:       }
twisti@1858: 
twisti@2201:       __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
twisti@1858:       __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858:     }
twisti@1858:     break;
twisti@1858: 
twisti@1858:   case _adapter_opt_f2d:        // optimized subcase of adapt_prim_to_prim
twisti@1858:   case _adapter_opt_d2f:        // optimized subcase of adapt_prim_to_prim
twisti@1858:     {
twisti@1858:       // perform an in-place floating primitive conversion
twisti@1858:       __ unimplemented(entry_name(ek));
twisti@1858:     }
twisti@1858:     break;
twisti@1858: 
twisti@1858:   case _adapter_prim_to_ref:
twisti@1858:     __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
twisti@1858:     break;
twisti@1858: 
twisti@1858:   case _adapter_swap_args:
twisti@1858:   case _adapter_rot_args:
twisti@1858:     // handled completely by optimized cases
twisti@1858:     __ stop("init_AdapterMethodHandle should not issue this");
twisti@1858:     break;
twisti@1858: 
twisti@1858:   case _adapter_opt_swap_1:
twisti@1858:   case _adapter_opt_swap_2:
twisti@1858:   case _adapter_opt_rot_1_up:
twisti@1858:   case _adapter_opt_rot_1_down:
twisti@1858:   case _adapter_opt_rot_2_up:
twisti@1858:   case _adapter_opt_rot_2_down:
twisti@1858:     {
never@2950:       int swap_slots = ek_adapter_opt_swap_slots(ek);
never@2950:       int rotate     = ek_adapter_opt_swap_mode(ek);
twisti@1858: 
twisti@1858:       // 'argslot' is the position of the first argument to swap.
never@2950:       load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
never@2950:       __ add(__ argument_address(O0_argslot, O0_argslot), O0_argslot);
never@2950:       if (VerifyMethodHandles)
never@2950:         verify_argslot(_masm, O0_argslot, O2_scratch, "swap point must fall within current frame");
twisti@1858: 
twisti@1858:       // 'vminfo' is the second.
twisti@1858:       Register O1_destslot = O1_scratch;
never@2950:       load_conversion_vminfo(_masm, G3_amh_conversion, O1_destslot);
never@2950:       __ add(__ argument_address(O1_destslot, O1_destslot), O1_destslot);
never@2950:       if (VerifyMethodHandles)
never@2950:         verify_argslot(_masm, O1_destslot, O2_scratch, "swap point must fall within current frame");
twisti@1858: 
never@2950:       assert(Interpreter::stackElementSize == wordSize, "else rethink use of wordSize here");
twisti@1858:       if (!rotate) {
never@2950:         // simple swap
never@2950:         for (int i = 0; i < swap_slots; i++) {
never@2950:           __ ld_ptr(            Address(O0_argslot,  i * wordSize), O2_scratch);
never@2950:           __ ld_ptr(            Address(O1_destslot, i * wordSize), O3_scratch);
never@2950:           __ st_ptr(O3_scratch, Address(O0_argslot,  i * wordSize));
never@2950:           __ st_ptr(O2_scratch, Address(O1_destslot, i * wordSize));
twisti@1858:         }
twisti@1858:       } else {
never@2950:         // A rotate is actually pair of moves, with an "odd slot" (or pair)
never@2950:         // changing place with a series of other slots.
never@2950:         // First, push the "odd slot", which is going to get overwritten
never@2950:         switch (swap_slots) {
never@2950:         case 2 :  __ ld_ptr(Address(O0_argslot, 1 * wordSize), O4_scratch); // fall-thru
never@2950:         case 1 :  __ ld_ptr(Address(O0_argslot, 0 * wordSize), O3_scratch); break;
never@2950:         default:  ShouldNotReachHere();
twisti@1858:         }
twisti@1858:         if (rotate > 0) {
never@2950:           // Here is rotate > 0:
never@2950:           // (low mem)                                          (high mem)
never@2950:           //     | dest:     more_slots...     | arg: odd_slot :arg+1 |
never@2950:           // =>
never@2950:           //     | dest: odd_slot | dest+1: more_slots...      :arg+1 |
never@2950:           // work argslot down to destslot, copying contiguous data upwards
never@2950:           // pseudo-code:
twisti@1858:           //   argslot  = src_addr - swap_bytes
twisti@1858:           //   destslot = dest_addr
never@2950:           //   while (argslot >= destslot) *(argslot + swap_bytes) = *(argslot + 0), argslot--;
never@2950:           move_arg_slots_up(_masm,
never@2950:                             O1_destslot,
never@2950:                             Address(O0_argslot, 0),
never@2950:                             swap_slots,
never@2950:                             O0_argslot, O2_scratch);
twisti@1858:         } else {
never@2950:           // Here is the other direction, rotate < 0:
never@2950:           // (low mem)                                          (high mem)
never@2950:           //     | arg: odd_slot | arg+1: more_slots...       :dest+1 |
never@2950:           // =>
never@2950:           //     | arg:    more_slots...     | dest: odd_slot :dest+1 |
never@2950:           // work argslot up to destslot, copying contiguous data downwards
never@2950:           // pseudo-code:
twisti@1858:           //   argslot  = src_addr + swap_bytes
twisti@1858:           //   destslot = dest_addr
never@2950:           //   while (argslot <= destslot) *(argslot - swap_bytes) = *(argslot + 0), argslot++;
never@2950:           __ add(O1_destslot, wordSize, O1_destslot);
never@2950:           move_arg_slots_down(_masm,
never@2950:                               Address(O0_argslot, swap_slots * wordSize),
never@2950:                               O1_destslot,
never@2950:                               -swap_slots,
never@2950:                               O0_argslot, O2_scratch);
never@2950: 
never@2950:           __ sub(O1_destslot, wordSize, O1_destslot);
twisti@1858:         }
never@2950:         // pop the original first chunk into the destination slot, now free
never@2950:         switch (swap_slots) {
never@2950:         case 2 :  __ st_ptr(O4_scratch, Address(O1_destslot, 1 * wordSize)); // fall-thru
never@2950:         case 1 :  __ st_ptr(O3_scratch, Address(O1_destslot, 0 * wordSize)); break;
never@2950:         default:  ShouldNotReachHere();
twisti@1858:         }
twisti@1858:       }
twisti@1858: 
twisti@2201:       __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
twisti@1858:       __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858:     }
twisti@1858:     break;
twisti@1858: 
twisti@1858:   case _adapter_dup_args:
twisti@1858:     {
twisti@1858:       // 'argslot' is the position of the first argument to duplicate.
never@2950:       load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
never@2950:       __ add(__ argument_address(O0_argslot, O0_argslot), O0_argslot);
twisti@1858: 
twisti@1858:       // 'stack_move' is negative number of words to duplicate.
never@2950:       Register O1_stack_move = O1_scratch;
never@2950:       load_stack_move(_masm, G3_amh_conversion, O1_stack_move);
twisti@1858: 
never@2950:       if (VerifyMethodHandles) {
never@2950:         verify_argslots(_masm, O1_stack_move, O0_argslot, O2_scratch, O3_scratch, true,
never@2950:                         "copied argument(s) must fall within current frame");
never@2950:       }
twisti@1858: 
never@2950:       // insert location is always the bottom of the argument list:
never@2950:       __ neg(O1_stack_move);
never@2950:       push_arg_slots(_masm, O0_argslot, O1_stack_move, O2_scratch, O3_scratch);
twisti@1858: 
twisti@2201:       __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
twisti@1858:       __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858:     }
twisti@1858:     break;
twisti@1858: 
twisti@1858:   case _adapter_drop_args:
twisti@1858:     {
twisti@1858:       // 'argslot' is the position of the first argument to nuke.
never@2950:       load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
never@2950:       __ add(__ argument_address(O0_argslot, O0_argslot), O0_argslot);
twisti@1858: 
twisti@1858:       // 'stack_move' is number of words to drop.
never@2950:       Register O1_stack_move = O1_scratch;
never@2950:       load_stack_move(_masm, G3_amh_conversion, O1_stack_move);
twisti@1858: 
never@2950:       remove_arg_slots(_masm, O1_stack_move, O0_argslot, O2_scratch, O3_scratch, O4_scratch);
twisti@1858: 
twisti@2201:       __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
twisti@1858:       __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858:     }
twisti@1858:     break;
twisti@1858: 
twisti@1858:   case _adapter_collect_args:
never@2950:   case _adapter_fold_args:
twisti@1858:   case _adapter_spread_args:
twisti@1858:     // Handled completely by optimized cases.
twisti@1858:     __ stop("init_AdapterMethodHandle should not issue this");
twisti@1858:     break;
twisti@1858: 
never@2950:   case _adapter_opt_collect_ref:
never@2950:   case _adapter_opt_collect_int:
never@2950:   case _adapter_opt_collect_long:
never@2950:   case _adapter_opt_collect_float:
never@2950:   case _adapter_opt_collect_double:
never@2950:   case _adapter_opt_collect_void:
never@2950:   case _adapter_opt_collect_0_ref:
never@2950:   case _adapter_opt_collect_1_ref:
never@2950:   case _adapter_opt_collect_2_ref:
never@2950:   case _adapter_opt_collect_3_ref:
never@2950:   case _adapter_opt_collect_4_ref:
never@2950:   case _adapter_opt_collect_5_ref:
never@2950:   case _adapter_opt_filter_S0_ref:
never@2950:   case _adapter_opt_filter_S1_ref:
never@2950:   case _adapter_opt_filter_S2_ref:
never@2950:   case _adapter_opt_filter_S3_ref:
never@2950:   case _adapter_opt_filter_S4_ref:
never@2950:   case _adapter_opt_filter_S5_ref:
never@2950:   case _adapter_opt_collect_2_S0_ref:
never@2950:   case _adapter_opt_collect_2_S1_ref:
never@2950:   case _adapter_opt_collect_2_S2_ref:
never@2950:   case _adapter_opt_collect_2_S3_ref:
never@2950:   case _adapter_opt_collect_2_S4_ref:
never@2950:   case _adapter_opt_collect_2_S5_ref:
never@2950:   case _adapter_opt_fold_ref:
never@2950:   case _adapter_opt_fold_int:
never@2950:   case _adapter_opt_fold_long:
never@2950:   case _adapter_opt_fold_float:
never@2950:   case _adapter_opt_fold_double:
never@2950:   case _adapter_opt_fold_void:
never@2950:   case _adapter_opt_fold_1_ref:
never@2950:   case _adapter_opt_fold_2_ref:
never@2950:   case _adapter_opt_fold_3_ref:
never@2950:   case _adapter_opt_fold_4_ref:
never@2950:   case _adapter_opt_fold_5_ref:
twisti@1858:     {
never@2950:       // Given a fresh incoming stack frame, build a new ricochet frame.
never@2950:       // On entry, TOS points at a return PC, and FP is the callers frame ptr.
never@2950:       // RSI/R13 has the caller's exact stack pointer, which we must also preserve.
never@2950:       // RCX contains an AdapterMethodHandle of the indicated kind.
never@2950: 
never@2950:       // Relevant AMH fields:
never@2950:       // amh.vmargslot:
never@2950:       //   points to the trailing edge of the arguments
never@2950:       //   to filter, collect, or fold.  For a boxing operation,
never@2950:       //   it points just after the single primitive value.
never@2950:       // amh.argument:
never@2950:       //   recursively called MH, on |collect| arguments
never@2950:       // amh.vmtarget:
never@2950:       //   final destination MH, on return value, etc.
never@2950:       // amh.conversion.dest:
never@2950:       //   tells what is the type of the return value
never@2950:       //   (not needed here, since dest is also derived from ek)
never@2950:       // amh.conversion.vminfo:
never@2950:       //   points to the trailing edge of the return value
never@2950:       //   when the vmtarget is to be called; this is
never@2950:       //   equal to vmargslot + (retained ? |collect| : 0)
never@2950: 
never@2950:       // Pass 0 or more argument slots to the recursive target.
never@2950:       int collect_count_constant = ek_adapter_opt_collect_count(ek);
never@2950: 
never@2950:       // The collected arguments are copied from the saved argument list:
never@2950:       int collect_slot_constant = ek_adapter_opt_collect_slot(ek);
never@2950: 
never@2950:       assert(ek_orig == _adapter_collect_args ||
never@2950:              ek_orig == _adapter_fold_args, "");
never@2950:       bool retain_original_args = (ek_orig == _adapter_fold_args);
never@2950: 
never@2950:       // The return value is replaced (or inserted) at the 'vminfo' argslot.
never@2950:       // Sometimes we can compute this statically.
never@2950:       int dest_slot_constant = -1;
never@2950:       if (!retain_original_args)
never@2950:         dest_slot_constant = collect_slot_constant;
never@2950:       else if (collect_slot_constant >= 0 && collect_count_constant >= 0)
never@2950:         // We are preserving all the arguments, and the return value is prepended,
never@2950:         // so the return slot is to the left (above) the |collect| sequence.
never@2950:         dest_slot_constant = collect_slot_constant + collect_count_constant;
never@2950: 
never@2950:       // Replace all those slots by the result of the recursive call.
never@2950:       // The result type can be one of ref, int, long, float, double, void.
never@2950:       // In the case of void, nothing is pushed on the stack after return.
never@2950:       BasicType dest = ek_adapter_opt_collect_type(ek);
never@2950:       assert(dest == type2wfield[dest], "dest is a stack slot type");
never@2950:       int dest_count = type2size[dest];
never@2950:       assert(dest_count == 1 || dest_count == 2 || (dest_count == 0 && dest == T_VOID), "dest has a size");
never@2950: 
never@2950:       // Choose a return continuation.
never@2950:       EntryKind ek_ret = _adapter_opt_return_any;
never@2950:       if (dest != T_CONFLICT && OptimizeMethodHandles) {
never@2950:         switch (dest) {
never@2950:         case T_INT    : ek_ret = _adapter_opt_return_int;     break;
never@2950:         case T_LONG   : ek_ret = _adapter_opt_return_long;    break;
never@2950:         case T_FLOAT  : ek_ret = _adapter_opt_return_float;   break;
never@2950:         case T_DOUBLE : ek_ret = _adapter_opt_return_double;  break;
never@2950:         case T_OBJECT : ek_ret = _adapter_opt_return_ref;     break;
never@2950:         case T_VOID   : ek_ret = _adapter_opt_return_void;    break;
never@2950:         default       : ShouldNotReachHere();
never@2950:         }
never@2950:         if (dest == T_OBJECT && dest_slot_constant >= 0) {
never@2950:           EntryKind ek_try = EntryKind(_adapter_opt_return_S0_ref + dest_slot_constant);
never@2950:           if (ek_try <= _adapter_opt_return_LAST &&
never@2950:               ek_adapter_opt_return_slot(ek_try) == dest_slot_constant) {
never@2950:             ek_ret = ek_try;
never@2950:           }
never@2950:         }
never@2950:         assert(ek_adapter_opt_return_type(ek_ret) == dest, "");
never@2950:       }
never@2950: 
never@2950:       // Already pushed:  ... keep1 | collect | keep2 |
never@2950: 
never@2950:       // Push a few extra argument words, if we need them to store the return value.
never@2950:       {
never@2950:         int extra_slots = 0;
never@2950:         if (retain_original_args) {
never@2950:           extra_slots = dest_count;
never@2950:         } else if (collect_count_constant == -1) {
never@2950:           extra_slots = dest_count;  // collect_count might be zero; be generous
never@2950:         } else if (dest_count > collect_count_constant) {
never@2950:           extra_slots = (dest_count - collect_count_constant);
never@2950:         } else {
never@2950:           // else we know we have enough dead space in |collect| to repurpose for return values
never@2950:         }
never@2950:         if (extra_slots != 0) {
never@2950:           __ sub(SP, round_to(extra_slots, 2) * Interpreter::stackElementSize, SP);
never@2950:         }
never@2950:       }
never@2950: 
never@2950:       // Set up Ricochet Frame.
never@2950:       __ mov(SP, O5_savedSP);  // record SP for the callee
never@2950: 
never@2950:       // One extra (empty) slot for outgoing target MH (see Gargs computation below).
never@2950:       __ save_frame(2);  // Note: we need to add 2 slots since frame::memory_parameter_word_sp_offset is 23.
never@2950: 
never@2950:       // Note: Gargs is live throughout the following, until we make our recursive call.
never@2950:       // And the RF saves a copy in L4_saved_args_base.
never@2950: 
never@2950:       RicochetFrame::enter_ricochet_frame(_masm, G3_method_handle, Gargs,
never@2950:                                           entry(ek_ret)->from_interpreted_entry());
never@2950: 
never@2950:       // Compute argument base:
never@2950:       // Set up Gargs for current frame, extra (empty) slot is for outgoing target MH (space reserved by save_frame above).
never@2950:       __ add(FP, STACK_BIAS - (1 * Interpreter::stackElementSize), Gargs);
never@2950: 
never@2950:       // Now pushed:  ... keep1 | collect | keep2 | extra | [RF]
never@2950: 
never@2950: #ifdef ASSERT
never@2950:       if (VerifyMethodHandles && dest != T_CONFLICT) {
never@2950:         BLOCK_COMMENT("verify AMH.conv.dest {");
never@2950:         extract_conversion_dest_type(_masm, RicochetFrame::L5_conversion, O1_scratch);
never@2950:         Label L_dest_ok;
never@2950:         __ cmp(O1_scratch, (int) dest);
never@2950:         __ br(Assembler::equal, false, Assembler::pt, L_dest_ok);
never@2950:         __ delayed()->nop();
never@2950:         if (dest == T_INT) {
never@2950:           for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
never@2950:             if (is_subword_type(BasicType(bt))) {
never@2950:               __ cmp(O1_scratch, (int) bt);
never@2950:               __ br(Assembler::equal, false, Assembler::pt, L_dest_ok);
never@2950:               __ delayed()->nop();
never@2950:             }
never@2950:           }
never@2950:         }
never@2950:         __ stop("bad dest in AMH.conv");
never@2950:         __ BIND(L_dest_ok);
never@2950:         BLOCK_COMMENT("} verify AMH.conv.dest");
never@2950:       }
never@2950: #endif //ASSERT
never@2950: 
never@2950:       // Find out where the original copy of the recursive argument sequence begins.
never@2950:       Register O0_coll = O0_scratch;
never@2950:       {
never@2950:         RegisterOrConstant collect_slot = collect_slot_constant;
never@2950:         if (collect_slot_constant == -1) {
never@2950:           load_vmargslot(_masm, G3_amh_vmargslot, O1_scratch);
never@2950:           collect_slot = O1_scratch;
never@2950:         }
never@2950:         // collect_slot might be 0, but we need the move anyway.
never@2950:         __ add(RicochetFrame::L4_saved_args_base, __ argument_offset(collect_slot, collect_slot.register_or_noreg()), O0_coll);
never@2950:         // O0_coll now points at the trailing edge of |collect| and leading edge of |keep2|
never@2950:       }
never@2950: 
never@2950:       // Replace the old AMH with the recursive MH.  (No going back now.)
never@2950:       // In the case of a boxing call, the recursive call is to a 'boxer' method,
never@2950:       // such as Integer.valueOf or Long.valueOf.  In the case of a filter
never@2950:       // or collect call, it will take one or more arguments, transform them,
never@2950:       // and return some result, to store back into argument_base[vminfo].
never@2950:       __ load_heap_oop(G3_amh_argument, G3_method_handle);
never@2950:       if (VerifyMethodHandles)  verify_method_handle(_masm, G3_method_handle, O1_scratch, O2_scratch);
never@2950: 
never@2950:       // Calculate |collect|, the number of arguments we are collecting.
never@2950:       Register O1_collect_count = O1_scratch;
never@2950:       RegisterOrConstant collect_count;
never@2950:       if (collect_count_constant < 0) {
never@2950:         __ load_method_handle_vmslots(O1_collect_count, G3_method_handle, O2_scratch);
never@2950:         collect_count = O1_collect_count;
never@2950:       } else {
never@2950:         collect_count = collect_count_constant;
never@2950: #ifdef ASSERT
never@2950:         if (VerifyMethodHandles) {
never@2950:           BLOCK_COMMENT("verify collect_count_constant {");
never@2950:           __ load_method_handle_vmslots(O3_scratch, G3_method_handle, O2_scratch);
never@2950:           Label L_count_ok;
never@2950:           __ cmp(O3_scratch, collect_count_constant);
never@2950:           __ br(Assembler::equal, false, Assembler::pt, L_count_ok);
never@2950:           __ delayed()->nop();
never@2950:           __ stop("bad vminfo in AMH.conv");
never@2950:           __ BIND(L_count_ok);
never@2950:           BLOCK_COMMENT("} verify collect_count_constant");
never@2950:         }
never@2950: #endif //ASSERT
never@2950:       }
never@2950: 
never@2950:       // copy |collect| slots directly to TOS:
never@2950:       push_arg_slots(_masm, O0_coll, collect_count, O2_scratch, O3_scratch);
never@2950:       // Now pushed:  ... keep1 | collect | keep2 | RF... | collect |
never@2950:       // O0_coll still points at the trailing edge of |collect| and leading edge of |keep2|
never@2950: 
never@2950:       // If necessary, adjust the saved arguments to make room for the eventual return value.
never@2950:       // Normal adjustment:  ... keep1 | +dest+ | -collect- | keep2 | RF... | collect |
never@2950:       // If retaining args:  ... keep1 | +dest+ |  collect  | keep2 | RF... | collect |
never@2950:       // In the non-retaining case, this might move keep2 either up or down.
never@2950:       // We don't have to copy the whole | RF... collect | complex,
never@2950:       // but we must adjust RF.saved_args_base.
never@2950:       // Also, from now on, we will forget about the original copy of |collect|.
never@2950:       // If we are retaining it, we will treat it as part of |keep2|.
never@2950:       // For clarity we will define |keep3| = |collect|keep2| or |keep2|.
never@2950: 
never@2950:       BLOCK_COMMENT("adjust trailing arguments {");
never@2950:       // Compare the sizes of |+dest+| and |-collect-|, which are opposed opening and closing movements.
never@2950:       int                open_count  = dest_count;
never@2950:       RegisterOrConstant close_count = collect_count_constant;
never@2950:       Register O1_close_count = O1_collect_count;
never@2950:       if (retain_original_args) {
never@2950:         close_count = constant(0);
never@2950:       } else if (collect_count_constant == -1) {
never@2950:         close_count = O1_collect_count;
never@2950:       }
never@2950: 
never@2950:       // How many slots need moving?  This is simply dest_slot (0 => no |keep3|).
never@2950:       RegisterOrConstant keep3_count;
never@2950:       Register O2_keep3_count = O2_scratch;
never@2950:       if (dest_slot_constant < 0) {
never@2950:         extract_conversion_vminfo(_masm, RicochetFrame::L5_conversion, O2_keep3_count);
never@2950:         keep3_count = O2_keep3_count;
never@2950:       } else  {
never@2950:         keep3_count = dest_slot_constant;
never@2950: #ifdef ASSERT
never@2950:         if (VerifyMethodHandles && dest_slot_constant < 0) {
never@2950:           BLOCK_COMMENT("verify dest_slot_constant {");
never@2950:           extract_conversion_vminfo(_masm, RicochetFrame::L5_conversion, O3_scratch);
never@2950:           Label L_vminfo_ok;
never@2950:           __ cmp(O3_scratch, dest_slot_constant);
never@2950:           __ br(Assembler::equal, false, Assembler::pt, L_vminfo_ok);
never@2950:           __ delayed()->nop();
never@2950:           __ stop("bad vminfo in AMH.conv");
never@2950:           __ BIND(L_vminfo_ok);
never@2950:           BLOCK_COMMENT("} verify dest_slot_constant");
never@2950:         }
never@2950: #endif //ASSERT
never@2950:       }
never@2950: 
never@2950:       // tasks remaining:
never@2950:       bool move_keep3 = (!keep3_count.is_constant() || keep3_count.as_constant() != 0);
never@2950:       bool stomp_dest = (NOT_DEBUG(dest == T_OBJECT) DEBUG_ONLY(dest_count != 0));
never@2950:       bool fix_arg_base = (!close_count.is_constant() || open_count != close_count.as_constant());
never@2950: 
never@2950:       // Old and new argument locations (based at slot 0).
never@2950:       // Net shift (&new_argv - &old_argv) is (close_count - open_count).
never@2950:       bool zero_open_count = (open_count == 0);  // remember this bit of info
never@2950:       if (move_keep3 && fix_arg_base) {
never@2950:         // It will be easier to have everything in one register:
never@2950:         if (close_count.is_register()) {
never@2950:           // Deduct open_count from close_count register to get a clean +/- value.
never@2950:           __ sub(close_count.as_register(), open_count, close_count.as_register());
never@2950:         } else {
never@2950:           close_count = close_count.as_constant() - open_count;
never@2950:         }
never@2950:         open_count = 0;
never@2950:       }
never@2950:       Register L4_old_argv = RicochetFrame::L4_saved_args_base;
never@2950:       Register O3_new_argv = O3_scratch;
never@2950:       if (fix_arg_base) {
never@2950:         __ add(L4_old_argv, __ argument_offset(close_count, O4_scratch), O3_new_argv,
never@2950:                -(open_count * Interpreter::stackElementSize));
never@2950:       }
never@2950: 
never@2950:       // First decide if any actual data are to be moved.
never@2950:       // We can skip if (a) |keep3| is empty, or (b) the argument list size didn't change.
never@2950:       // (As it happens, all movements involve an argument list size change.)
never@2950: 
never@2950:       // If there are variable parameters, use dynamic checks to skip around the whole mess.
never@2950:       Label L_done;
never@2950:       if (keep3_count.is_register()) {
never@2950:         __ tst(keep3_count.as_register());
never@2950:         __ br(Assembler::zero, false, Assembler::pn, L_done);
never@2950:         __ delayed()->nop();
never@2950:       }
never@2950:       if (close_count.is_register()) {
never@2950:         __ cmp(close_count.as_register(), open_count);
never@2950:         __ br(Assembler::equal, false, Assembler::pn, L_done);
never@2950:         __ delayed()->nop();
never@2950:       }
never@2950: 
never@2950:       if (move_keep3 && fix_arg_base) {
never@2950:         bool emit_move_down = false, emit_move_up = false, emit_guard = false;
never@2950:         if (!close_count.is_constant()) {
never@2950:           emit_move_down = emit_guard = !zero_open_count;
never@2950:           emit_move_up   = true;
never@2950:         } else if (open_count != close_count.as_constant()) {
never@2950:           emit_move_down = (open_count > close_count.as_constant());
never@2950:           emit_move_up   = !emit_move_down;
never@2950:         }
never@2950:         Label L_move_up;
never@2950:         if (emit_guard) {
never@2950:           __ cmp(close_count.as_register(), open_count);
never@2950:           __ br(Assembler::greater, false, Assembler::pn, L_move_up);
never@2950:           __ delayed()->nop();
never@2950:         }
never@2950: 
never@2950:         if (emit_move_down) {
never@2950:           // Move arguments down if |+dest+| > |-collect-|
never@2950:           // (This is rare, except when arguments are retained.)
never@2950:           // This opens space for the return value.
never@2950:           if (keep3_count.is_constant()) {
never@2950:             for (int i = 0; i < keep3_count.as_constant(); i++) {
never@2950:               __ ld_ptr(            Address(L4_old_argv, i * Interpreter::stackElementSize), O4_scratch);
never@2950:               __ st_ptr(O4_scratch, Address(O3_new_argv, i * Interpreter::stackElementSize)            );
never@2950:             }
never@2950:           } else {
never@2950:             // Live: O1_close_count, O2_keep3_count, O3_new_argv
never@2950:             Register argv_top = O0_scratch;
never@2950:             __ add(L4_old_argv, __ argument_offset(keep3_count, O4_scratch), argv_top);
never@2950:             move_arg_slots_down(_masm,
never@2950:                                 Address(L4_old_argv, 0),  // beginning of old argv
never@2950:                                 argv_top,                 // end of old argv
never@2950:                                 close_count,              // distance to move down (must be negative)
never@2950:                                 O4_scratch, G5_scratch);
never@2950:           }
never@2950:         }
never@2950: 
never@2950:         if (emit_guard) {
never@2950:           __ ba(false, L_done);  // assumes emit_move_up is true also
never@2950:           __ delayed()->nop();
never@2950:           __ BIND(L_move_up);
never@2950:         }
never@2950: 
never@2950:         if (emit_move_up) {
never@2950:           // Move arguments up if |+dest+| < |-collect-|
never@2950:           // (This is usual, except when |keep3| is empty.)
never@2950:           // This closes up the space occupied by the now-deleted collect values.
never@2950:           if (keep3_count.is_constant()) {
never@2950:             for (int i = keep3_count.as_constant() - 1; i >= 0; i--) {
never@2950:               __ ld_ptr(            Address(L4_old_argv, i * Interpreter::stackElementSize), O4_scratch);
never@2950:               __ st_ptr(O4_scratch, Address(O3_new_argv, i * Interpreter::stackElementSize)            );
never@2950:             }
never@2950:           } else {
never@2950:             Address argv_top(L4_old_argv, __ argument_offset(keep3_count, O4_scratch));
never@2950:             // Live: O1_close_count, O2_keep3_count, O3_new_argv
never@2950:             move_arg_slots_up(_masm,
never@2950:                               L4_old_argv,  // beginning of old argv
never@2950:                               argv_top,     // end of old argv
never@2950:                               close_count,  // distance to move up (must be positive)
never@2950:                               O4_scratch, G5_scratch);
never@2950:           }
never@2950:         }
never@2950:       }
never@2950:       __ BIND(L_done);
never@2950: 
never@2950:       if (fix_arg_base) {
never@2950:         // adjust RF.saved_args_base
never@2950:         __ mov(O3_new_argv, RicochetFrame::L4_saved_args_base);
never@2950:       }
never@2950: 
never@2950:       if (stomp_dest) {
never@2950:         // Stomp the return slot, so it doesn't hold garbage.
never@2950:         // This isn't strictly necessary, but it may help detect bugs.
never@2950:         __ set(RicochetFrame::RETURN_VALUE_PLACEHOLDER, O4_scratch);
never@2950:         __ st_ptr(O4_scratch, Address(RicochetFrame::L4_saved_args_base,
never@2950:                                       __ argument_offset(keep3_count, keep3_count.register_or_noreg())));  // uses O2_keep3_count
never@2950:       }
never@2950:       BLOCK_COMMENT("} adjust trailing arguments");
never@2950: 
never@2950:       BLOCK_COMMENT("do_recursive_call");
never@2950:       __ mov(SP, O5_savedSP);  // record SP for the callee
never@2950:       __ set(ExternalAddress(SharedRuntime::ricochet_blob()->bounce_addr() - frame::pc_return_offset), O7);
never@2950:       // The globally unique bounce address has two purposes:
never@2950:       // 1. It helps the JVM recognize this frame (frame::is_ricochet_frame).
never@2950:       // 2. When returned to, it cuts back the stack and redirects control flow
never@2950:       //    to the return handler.
never@2950:       // The return handler will further cut back the stack when it takes
never@2950:       // down the RF.  Perhaps there is a way to streamline this further.
never@2950: 
never@2950:       // State during recursive call:
never@2950:       // ... keep1 | dest | dest=42 | keep3 | RF... | collect | bounce_pc |
never@2950:       __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858:     }
twisti@1858:     break;
twisti@1858: 
never@2950:   case _adapter_opt_return_ref:
never@2950:   case _adapter_opt_return_int:
never@2950:   case _adapter_opt_return_long:
never@2950:   case _adapter_opt_return_float:
never@2950:   case _adapter_opt_return_double:
never@2950:   case _adapter_opt_return_void:
never@2950:   case _adapter_opt_return_S0_ref:
never@2950:   case _adapter_opt_return_S1_ref:
never@2950:   case _adapter_opt_return_S2_ref:
never@2950:   case _adapter_opt_return_S3_ref:
never@2950:   case _adapter_opt_return_S4_ref:
never@2950:   case _adapter_opt_return_S5_ref:
never@2950:     {
never@2950:       BasicType dest_type_constant = ek_adapter_opt_return_type(ek);
never@2950:       int       dest_slot_constant = ek_adapter_opt_return_slot(ek);
never@2950: 
never@2950:       if (VerifyMethodHandles)  RicochetFrame::verify_clean(_masm);
never@2950: 
never@2950:       if (dest_slot_constant == -1) {
never@2950:         // The current stub is a general handler for this dest_type.
never@2950:         // It can be called from _adapter_opt_return_any below.
never@2950:         // Stash the address in a little table.
never@2950:         assert((dest_type_constant & CONV_TYPE_MASK) == dest_type_constant, "oob");
never@2950:         address return_handler = __ pc();
never@2950:         _adapter_return_handlers[dest_type_constant] = return_handler;
never@2950:         if (dest_type_constant == T_INT) {
never@2950:           // do the subword types too
never@2950:           for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
never@2950:             if (is_subword_type(BasicType(bt)) &&
never@2950:                 _adapter_return_handlers[bt] == NULL) {
never@2950:               _adapter_return_handlers[bt] = return_handler;
never@2950:             }
never@2950:           }
never@2950:         }
never@2950:       }
never@2950: 
never@2950:       // On entry to this continuation handler, make Gargs live again.
never@2950:       __ mov(RicochetFrame::L4_saved_args_base, Gargs);
never@2950: 
never@2950:       Register O7_temp   = O7;
never@2950:       Register O5_vminfo = O5;
never@2950: 
never@2950:       RegisterOrConstant dest_slot = dest_slot_constant;
never@2950:       if (dest_slot_constant == -1) {
never@2950:         extract_conversion_vminfo(_masm, RicochetFrame::L5_conversion, O5_vminfo);
never@2950:         dest_slot = O5_vminfo;
never@2950:       }
never@2950:       // Store the result back into the argslot.
never@2950:       // This code uses the interpreter calling sequence, in which the return value
never@2950:       // is usually left in the TOS register, as defined by InterpreterMacroAssembler::pop.
never@2950:       // There are certain irregularities with floating point values, which can be seen
never@2950:       // in TemplateInterpreterGenerator::generate_return_entry_for.
never@2950:       move_return_value(_masm, dest_type_constant, __ argument_address(dest_slot, O7_temp));
never@2950: 
never@2950:       RicochetFrame::leave_ricochet_frame(_masm, G3_method_handle, I5_savedSP, I7);
never@2950: 
never@2950:       // Load the final target and go.
never@2950:       if (VerifyMethodHandles)  verify_method_handle(_masm, G3_method_handle, O0_scratch, O1_scratch);
never@2950:       __ restore(I5_savedSP, G0, SP);
never@2950:       __ jump_to_method_handle_entry(G3_method_handle, O0_scratch);
never@2950:       __ illtrap(0);
never@2950:     }
never@2950:     break;
never@2950: 
never@2950:   case _adapter_opt_return_any:
never@2950:     {
never@2950:       Register O7_temp      = O7;
never@2950:       Register O5_dest_type = O5;
never@2950: 
never@2950:       if (VerifyMethodHandles)  RicochetFrame::verify_clean(_masm);
never@2950:       extract_conversion_dest_type(_masm, RicochetFrame::L5_conversion, O5_dest_type);
never@2950:       __ set(ExternalAddress((address) &_adapter_return_handlers[0]), O7_temp);
never@2950:       __ sll_ptr(O5_dest_type, LogBytesPerWord, O5_dest_type);
never@2950:       __ ld_ptr(O7_temp, O5_dest_type, O7_temp);
never@2950: 
never@2950: #ifdef ASSERT
never@2950:       { Label L_ok;
never@2950:         __ br_notnull(O7_temp, false, Assembler::pt, L_ok);
never@2950:         __ delayed()->nop();
never@2950:         __ stop("bad method handle return");
never@2950:         __ BIND(L_ok);
never@2950:       }
never@2950: #endif //ASSERT
never@2950:       __ JMP(O7_temp, 0);
never@2950:       __ delayed()->nop();
never@2950:     }
never@2950:     break;
never@2950: 
never@2950:   case _adapter_opt_spread_0:
never@2950:   case _adapter_opt_spread_1_ref:
never@2950:   case _adapter_opt_spread_2_ref:
never@2950:   case _adapter_opt_spread_3_ref:
never@2950:   case _adapter_opt_spread_4_ref:
never@2950:   case _adapter_opt_spread_5_ref:
never@2950:   case _adapter_opt_spread_ref:
never@2950:   case _adapter_opt_spread_byte:
never@2950:   case _adapter_opt_spread_char:
never@2950:   case _adapter_opt_spread_short:
never@2950:   case _adapter_opt_spread_int:
never@2950:   case _adapter_opt_spread_long:
never@2950:   case _adapter_opt_spread_float:
never@2950:   case _adapter_opt_spread_double:
never@2950:     {
never@2950:       // spread an array out into a group of arguments
never@2950:       int  length_constant    = ek_adapter_opt_spread_count(ek);
never@2950:       bool length_can_be_zero = (length_constant == 0);
never@2950:       if (length_constant < 0) {
never@2950:         // some adapters with variable length must handle the zero case
never@2950:         if (!OptimizeMethodHandles ||
never@2950:             ek_adapter_opt_spread_type(ek) != T_OBJECT)
never@2950:           length_can_be_zero = true;
never@2950:       }
never@2950: 
never@2950:       // find the address of the array argument
never@2950:       load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
never@2950:       __ add(__ argument_address(O0_argslot, O0_argslot), O0_argslot);
never@2950: 
never@2950:       // O0_argslot points both to the array and to the first output arg
never@2950:       Address vmarg = Address(O0_argslot, 0);
never@2950: 
never@2950:       // Get the array value.
never@2950:       Register  O1_array       = O1_scratch;
never@2950:       Register  O2_array_klass = O2_scratch;
never@2950:       BasicType elem_type      = ek_adapter_opt_spread_type(ek);
never@2950:       int       elem_slots     = type2size[elem_type];  // 1 or 2
never@2950:       int       array_slots    = 1;  // array is always a T_OBJECT
never@2950:       int       length_offset  = arrayOopDesc::length_offset_in_bytes();
never@2950:       int       elem0_offset   = arrayOopDesc::base_offset_in_bytes(elem_type);
never@2950:       __ ld_ptr(vmarg, O1_array);
never@2950: 
never@2950:       Label L_array_is_empty, L_insert_arg_space, L_copy_args, L_args_done;
never@2950:       if (length_can_be_zero) {
never@2950:         // handle the null pointer case, if zero is allowed
never@2950:         Label L_skip;
never@2950:         if (length_constant < 0) {
never@2950:           load_conversion_vminfo(_masm, G3_amh_conversion, O3_scratch);
never@2950:           __ br_zero(Assembler::notZero, false, Assembler::pn, O3_scratch, L_skip);
never@2950:           __ delayed()->nop();
never@2950:         }
never@2950:         __ br_null(O1_array, false, Assembler::pn, L_array_is_empty);
never@2950:         __ delayed()->nop();
never@2950:         __ BIND(L_skip);
never@2950:       }
never@2950:       __ null_check(O1_array, oopDesc::klass_offset_in_bytes());
never@2950:       __ load_klass(O1_array, O2_array_klass);
never@2950: 
never@2950:       // Check the array type.
never@2950:       Register O3_klass = O3_scratch;
never@2950:       __ load_heap_oop(G3_amh_argument, O3_klass);  // this is a Class object!
never@2950:       load_klass_from_Class(_masm, O3_klass, O4_scratch, G5_scratch);
never@2950: 
never@2950:       Label L_ok_array_klass, L_bad_array_klass, L_bad_array_length;
never@2950:       __ check_klass_subtype(O2_array_klass, O3_klass, O4_scratch, G5_scratch, L_ok_array_klass);
never@2950:       // If we get here, the type check failed!
never@2950:       __ ba(false, L_bad_array_klass);
never@2950:       __ delayed()->nop();
never@2950:       __ BIND(L_ok_array_klass);
never@2950: 
never@2950:       // Check length.
never@2950:       if (length_constant >= 0) {
never@2950:         __ ldsw(Address(O1_array, length_offset), O4_scratch);
never@2950:         __ cmp(O4_scratch, length_constant);
never@2950:       } else {
never@2950:         Register O3_vminfo = O3_scratch;
never@2950:         load_conversion_vminfo(_masm, G3_amh_conversion, O3_vminfo);
never@2950:         __ ldsw(Address(O1_array, length_offset), O4_scratch);
never@2950:         __ cmp(O3_vminfo, O4_scratch);
never@2950:       }
never@2950:       __ br(Assembler::notEqual, false, Assembler::pn, L_bad_array_length);
never@2950:       __ delayed()->nop();
never@2950: 
never@2950:       Register O2_argslot_limit = O2_scratch;
never@2950: 
never@2950:       // Array length checks out.  Now insert any required stack slots.
never@2950:       if (length_constant == -1) {
never@2950:         // Form a pointer to the end of the affected region.
never@2950:         __ add(O0_argslot, Interpreter::stackElementSize, O2_argslot_limit);
never@2950:         // 'stack_move' is negative number of words to insert
never@2950:         // This number already accounts for elem_slots.
never@2950:         Register O3_stack_move = O3_scratch;
never@2950:         load_stack_move(_masm, G3_amh_conversion, O3_stack_move);
never@2950:         __ cmp(O3_stack_move, 0);
never@2950:         assert(stack_move_unit() < 0, "else change this comparison");
never@2950:         __ br(Assembler::less, false, Assembler::pn, L_insert_arg_space);
never@2950:         __ delayed()->nop();
never@2950:         __ br(Assembler::equal, false, Assembler::pn, L_copy_args);
never@2950:         __ delayed()->nop();
never@2950:         // single argument case, with no array movement
never@2950:         __ BIND(L_array_is_empty);
never@2950:         remove_arg_slots(_masm, -stack_move_unit() * array_slots,
never@2950:                          O0_argslot, O1_scratch, O2_scratch, O3_scratch);
never@2950:         __ ba(false, L_args_done);  // no spreading to do
never@2950:         __ delayed()->nop();
never@2950:         __ BIND(L_insert_arg_space);
never@2950:         // come here in the usual case, stack_move < 0 (2 or more spread arguments)
never@2950:         // Live: O1_array, O2_argslot_limit, O3_stack_move
never@2950:         insert_arg_slots(_masm, O3_stack_move,
never@2950:                          O0_argslot, O4_scratch, G5_scratch, O1_scratch);
never@2950:         // reload from rdx_argslot_limit since rax_argslot is now decremented
never@2950:         __ ld_ptr(Address(O2_argslot_limit, -Interpreter::stackElementSize), O1_array);
never@2950:       } else if (length_constant >= 1) {
never@2950:         int new_slots = (length_constant * elem_slots) - array_slots;
never@2950:         insert_arg_slots(_masm, new_slots * stack_move_unit(),
never@2950:                          O0_argslot, O2_scratch, O3_scratch, O4_scratch);
never@2950:       } else if (length_constant == 0) {
never@2950:         __ BIND(L_array_is_empty);
never@2950:         remove_arg_slots(_masm, -stack_move_unit() * array_slots,
never@2950:                          O0_argslot, O1_scratch, O2_scratch, O3_scratch);
never@2950:       } else {
never@2950:         ShouldNotReachHere();
never@2950:       }
never@2950: 
never@2950:       // Copy from the array to the new slots.
never@2950:       // Note: Stack change code preserves integrity of O0_argslot pointer.
never@2950:       // So even after slot insertions, O0_argslot still points to first argument.
never@2950:       // Beware:  Arguments that are shallow on the stack are deep in the array,
never@2950:       // and vice versa.  So a downward-growing stack (the usual) has to be copied
never@2950:       // elementwise in reverse order from the source array.
never@2950:       __ BIND(L_copy_args);
never@2950:       if (length_constant == -1) {
never@2950:         // [O0_argslot, O2_argslot_limit) is the area we are inserting into.
never@2950:         // Array element [0] goes at O0_argslot_limit[-wordSize].
never@2950:         Register O1_source = O1_array;
never@2950:         __ add(Address(O1_array, elem0_offset), O1_source);
never@2950:         Register O4_fill_ptr = O4_scratch;
never@2950:         __ mov(O2_argslot_limit, O4_fill_ptr);
never@2950:         Label L_loop;
never@2950:         __ BIND(L_loop);
never@2950:         __ add(O4_fill_ptr, -Interpreter::stackElementSize * elem_slots, O4_fill_ptr);
never@2950:         move_typed_arg(_masm, elem_type, true,
never@2950:                        Address(O1_source, 0), Address(O4_fill_ptr, 0),
never@2950:                        O2_scratch);  // must be an even register for !_LP64 long moves (uses O2/O3)
never@2950:         __ add(O1_source, type2aelembytes(elem_type), O1_source);
never@2950:         __ cmp(O4_fill_ptr, O0_argslot);
never@2950:         __ brx(Assembler::greaterUnsigned, false, Assembler::pt, L_loop);
never@2950:         __ delayed()->nop();  // FILLME
never@2950:       } else if (length_constant == 0) {
never@2950:         // nothing to copy
never@2950:       } else {
never@2950:         int elem_offset = elem0_offset;
never@2950:         int slot_offset = length_constant * Interpreter::stackElementSize;
never@2950:         for (int index = 0; index < length_constant; index++) {
never@2950:           slot_offset -= Interpreter::stackElementSize * elem_slots;  // fill backward
never@2950:           move_typed_arg(_masm, elem_type, true,
never@2950:                          Address(O1_array, elem_offset), Address(O0_argslot, slot_offset),
never@2950:                          O2_scratch);  // must be an even register for !_LP64 long moves (uses O2/O3)
never@2950:           elem_offset += type2aelembytes(elem_type);
never@2950:         }
never@2950:       }
never@2950:       __ BIND(L_args_done);
never@2950: 
never@2950:       // Arguments are spread.  Move to next method handle.
never@2950:       __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
never@2950:       __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
never@2950: 
never@2950:       __ BIND(L_bad_array_klass);
never@2950:       assert(!vmarg.uses(O2_required), "must be different registers");
never@2950:       __ load_heap_oop(Address(O2_array_klass, java_mirror_offset), O2_required);  // required class
never@2950:       __ ld_ptr(       vmarg,                                       O1_actual);    // bad object
never@2950:       __ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O3_scratch);
never@2950:       __ delayed()->mov(Bytecodes::_aaload,                         O0_code);      // who is complaining?
never@2950: 
never@2950:       __ bind(L_bad_array_length);
never@2950:       assert(!vmarg.uses(O2_required), "must be different registers");
never@2950:       __ mov(   G3_method_handle,                O2_required);  // required class
never@2950:       __ ld_ptr(vmarg,                           O1_actual);    // bad object
never@2950:       __ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O3_scratch);
never@2950:       __ delayed()->mov(Bytecodes::_arraylength, O0_code);      // who is complaining?
never@2950:     }
twisti@1858:     break;
twisti@1858: 
twisti@1858:   default:
never@2950:     DEBUG_ONLY(tty->print_cr("bad ek=%d (%s)", (int)ek, entry_name(ek)));
twisti@1858:     ShouldNotReachHere();
twisti@1858:   }
never@2950:   BLOCK_COMMENT(err_msg("} Entry %s", entry_name(ek)));
twisti@1858: 
twisti@1858:   address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
twisti@1858:   __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
twisti@1858: 
twisti@1858:   init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
jrose@1145: }