1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/cpu/x86/vm/methodHandles_x86.cpp Wed Apr 08 10:56:49 2009 -0700
1.3 @@ -0,0 +1,1133 @@
1.4 +/*
1.5 + * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "incls/_precompiled.incl"
1.29 +#include "incls/_methodHandles_x86.cpp.incl"
1.30 +
1.31 +#define __ _masm->
1.32 +
1.33 +address MethodHandleEntry::start_compiled_entry(MacroAssembler* _masm,
1.34 + address interpreted_entry) {
1.35 + // Just before the actual machine code entry point, allocate space
1.36 + // for a MethodHandleEntry::Data record, so that we can manage everything
1.37 + // from one base pointer.
1.38 + __ align(wordSize);
1.39 + address target = __ pc() + sizeof(Data);
1.40 + while (__ pc() < target) {
1.41 + __ nop();
1.42 + __ align(wordSize);
1.43 + }
1.44 +
1.45 + MethodHandleEntry* me = (MethodHandleEntry*) __ pc();
1.46 + me->set_end_address(__ pc()); // set a temporary end_address
1.47 + me->set_from_interpreted_entry(interpreted_entry);
1.48 + me->set_type_checking_entry(NULL);
1.49 +
1.50 + return (address) me;
1.51 +}
1.52 +
1.53 +MethodHandleEntry* MethodHandleEntry::finish_compiled_entry(MacroAssembler* _masm,
1.54 + address start_addr) {
1.55 + MethodHandleEntry* me = (MethodHandleEntry*) start_addr;
1.56 + assert(me->end_address() == start_addr, "valid ME");
1.57 +
1.58 + // Fill in the real end_address:
1.59 + __ align(wordSize);
1.60 + me->set_end_address(__ pc());
1.61 +
1.62 + return me;
1.63 +}
1.64 +
1.65 +#ifdef ASSERT
1.66 +static void verify_argslot(MacroAssembler* _masm, Register rax_argslot,
1.67 + const char* error_message) {
1.68 + // Verify that argslot lies within (rsp, rbp].
1.69 + Label L_ok, L_bad;
1.70 + __ cmpptr(rax_argslot, rbp);
1.71 + __ jcc(Assembler::above, L_bad);
1.72 + __ cmpptr(rsp, rax_argslot);
1.73 + __ jcc(Assembler::below, L_ok);
1.74 + __ bind(L_bad);
1.75 + __ stop(error_message);
1.76 + __ bind(L_ok);
1.77 +}
1.78 +#endif
1.79 +
1.80 +
1.81 +// Code generation
1.82 +address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm) {
1.83 + // rbx: methodOop
1.84 + // rcx: receiver method handle (must load from sp[MethodTypeForm.vmslots])
1.85 + // rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
1.86 + // rdx: garbage temp, blown away
1.87 +
1.88 + Register rbx_method = rbx;
1.89 + Register rcx_recv = rcx;
1.90 + Register rax_mtype = rax;
1.91 + Register rdx_temp = rdx;
1.92 +
1.93 + // emit WrongMethodType path first, to enable jccb back-branch from main path
1.94 + Label wrong_method_type;
1.95 + __ bind(wrong_method_type);
1.96 + __ push(rax_mtype); // required mtype
1.97 + __ push(rcx_recv); // bad mh (1st stacked argument)
1.98 + __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
1.99 +
1.100 + // here's where control starts out:
1.101 + __ align(CodeEntryAlignment);
1.102 + address entry_point = __ pc();
1.103 +
1.104 + // fetch the MethodType from the method handle into rax (the 'check' register)
1.105 + {
1.106 + Register tem = rbx_method;
1.107 + for (jint* pchase = methodOopDesc::method_type_offsets_chain(); (*pchase) != -1; pchase++) {
1.108 + __ movptr(rax_mtype, Address(tem, *pchase));
1.109 + tem = rax_mtype; // in case there is another indirection
1.110 + }
1.111 + }
1.112 + Register rbx_temp = rbx_method; // done with incoming methodOop
1.113 +
1.114 + // given the MethodType, find out where the MH argument is buried
1.115 + __ movptr(rdx_temp, Address(rax_mtype,
1.116 + __ delayed_value(java_dyn_MethodType::form_offset_in_bytes, rbx_temp)));
1.117 + __ movl(rdx_temp, Address(rdx_temp,
1.118 + __ delayed_value(java_dyn_MethodTypeForm::vmslots_offset_in_bytes, rbx_temp)));
1.119 + __ movptr(rcx_recv, __ argument_address(rdx_temp));
1.120 +
1.121 + __ check_method_handle_type(rax_mtype, rcx_recv, rdx_temp, wrong_method_type);
1.122 + __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1.123 +
1.124 + return entry_point;
1.125 +}
1.126 +
1.127 +// Helper to insert argument slots into the stack.
1.128 +// arg_slots must be a multiple of stack_move_unit() and <= 0
1.129 +void MethodHandles::insert_arg_slots(MacroAssembler* _masm,
1.130 + RegisterOrConstant arg_slots,
1.131 + int arg_mask,
1.132 + Register rax_argslot,
1.133 + Register rbx_temp, Register rdx_temp) {
1.134 + assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
1.135 + (!arg_slots.is_register() ? rsp : arg_slots.as_register()));
1.136 +
1.137 +#ifdef ASSERT
1.138 + verify_argslot(_masm, rax_argslot, "insertion point must fall within current frame");
1.139 + if (arg_slots.is_register()) {
1.140 + Label L_ok, L_bad;
1.141 + __ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
1.142 + __ jcc(Assembler::greater, L_bad);
1.143 + __ testl(arg_slots.as_register(), -stack_move_unit() - 1);
1.144 + __ jcc(Assembler::zero, L_ok);
1.145 + __ bind(L_bad);
1.146 + __ stop("assert arg_slots <= 0 and clear low bits");
1.147 + __ bind(L_ok);
1.148 + } else {
1.149 + assert(arg_slots.as_constant() <= 0, "");
1.150 + assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
1.151 + }
1.152 +#endif //ASSERT
1.153 +
1.154 +#ifdef _LP64
1.155 + if (arg_slots.is_register()) {
1.156 + // clean high bits of stack motion register (was loaded as an int)
1.157 + __ movslq(arg_slots.as_register(), arg_slots.as_register());
1.158 + }
1.159 +#endif
1.160 +
1.161 + // Make space on the stack for the inserted argument(s).
1.162 + // Then pull down everything shallower than rax_argslot.
1.163 + // The stacked return address gets pulled down with everything else.
1.164 + // That is, copy [rsp, argslot) downward by -size words. In pseudo-code:
1.165 + // rsp -= size;
1.166 + // for (rdx = rsp + size; rdx < argslot; rdx++)
1.167 + // rdx[-size] = rdx[0]
1.168 + // argslot -= size;
1.169 + __ mov(rdx_temp, rsp); // source pointer for copy
1.170 + __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
1.171 + {
1.172 + Label loop;
1.173 + __ bind(loop);
1.174 + // pull one word down each time through the loop
1.175 + __ movptr(rbx_temp, Address(rdx_temp, 0));
1.176 + __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
1.177 + __ addptr(rdx_temp, wordSize);
1.178 + __ cmpptr(rdx_temp, rax_argslot);
1.179 + __ jcc(Assembler::less, loop);
1.180 + }
1.181 +
1.182 + // Now move the argslot down, to point to the opened-up space.
1.183 + __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
1.184 +
1.185 + if (TaggedStackInterpreter && arg_mask != _INSERT_NO_MASK) {
1.186 + // The caller has specified a bitmask of tags to put into the opened space.
1.187 + // This only works when the arg_slots value is an assembly-time constant.
1.188 + int constant_arg_slots = arg_slots.as_constant() / stack_move_unit();
1.189 + int tag_offset = Interpreter::tag_offset_in_bytes() - Interpreter::value_offset_in_bytes();
1.190 + for (int slot = 0; slot < constant_arg_slots; slot++) {
1.191 + BasicType slot_type = ((arg_mask & (1 << slot)) == 0 ? T_OBJECT : T_INT);
1.192 + int slot_offset = Interpreter::stackElementSize() * slot;
1.193 + Address tag_addr(rax_argslot, slot_offset + tag_offset);
1.194 + __ movptr(tag_addr, frame::tag_for_basic_type(slot_type));
1.195 + }
1.196 + // Note that the new argument slots are tagged properly but contain
1.197 + // garbage at this point. The value portions must be initialized
1.198 + // by the caller. (Especially references!)
1.199 + }
1.200 +}
1.201 +
1.202 +// Helper to remove argument slots from the stack.
1.203 +// arg_slots must be a multiple of stack_move_unit() and >= 0
1.204 +void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
1.205 + RegisterOrConstant arg_slots,
1.206 + Register rax_argslot,
1.207 + Register rbx_temp, Register rdx_temp) {
1.208 + assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
1.209 + (!arg_slots.is_register() ? rsp : arg_slots.as_register()));
1.210 +
1.211 +#ifdef ASSERT
1.212 + {
1.213 + // Verify that [argslot..argslot+size) lies within (rsp, rbp).
1.214 + Label L_ok, L_bad;
1.215 + __ lea(rbx_temp, Address(rax_argslot, arg_slots, Address::times_ptr));
1.216 + __ cmpptr(rbx_temp, rbp);
1.217 + __ jcc(Assembler::above, L_bad);
1.218 + __ cmpptr(rsp, rax_argslot);
1.219 + __ jcc(Assembler::below, L_ok);
1.220 + __ bind(L_bad);
1.221 + __ stop("deleted argument(s) must fall within current frame");
1.222 + __ bind(L_ok);
1.223 + }
1.224 + if (arg_slots.is_register()) {
1.225 + Label L_ok, L_bad;
1.226 + __ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
1.227 + __ jcc(Assembler::less, L_bad);
1.228 + __ testl(arg_slots.as_register(), -stack_move_unit() - 1);
1.229 + __ jcc(Assembler::zero, L_ok);
1.230 + __ bind(L_bad);
1.231 + __ stop("assert arg_slots >= 0 and clear low bits");
1.232 + __ bind(L_ok);
1.233 + } else {
1.234 + assert(arg_slots.as_constant() >= 0, "");
1.235 + assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
1.236 + }
1.237 +#endif //ASSERT
1.238 +
1.239 +#ifdef _LP64
1.240 + if (false) { // not needed, since register is positive
1.241 + // clean high bits of stack motion register (was loaded as an int)
1.242 + if (arg_slots.is_register())
1.243 + __ movslq(arg_slots.as_register(), arg_slots.as_register());
1.244 + }
1.245 +#endif
1.246 +
1.247 + // Pull up everything shallower than rax_argslot.
1.248 + // Then remove the excess space on the stack.
1.249 + // The stacked return address gets pulled up with everything else.
1.250 + // That is, copy [rsp, argslot) upward by size words. In pseudo-code:
1.251 + // for (rdx = argslot-1; rdx >= rsp; --rdx)
1.252 + // rdx[size] = rdx[0]
1.253 + // argslot += size;
1.254 + // rsp += size;
1.255 + __ lea(rdx_temp, Address(rax_argslot, -wordSize)); // source pointer for copy
1.256 + {
1.257 + Label loop;
1.258 + __ bind(loop);
1.259 + // pull one word up each time through the loop
1.260 + __ movptr(rbx_temp, Address(rdx_temp, 0));
1.261 + __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
1.262 + __ addptr(rdx_temp, -wordSize);
1.263 + __ cmpptr(rdx_temp, rsp);
1.264 + __ jcc(Assembler::greaterEqual, loop);
1.265 + }
1.266 +
1.267 + // Now move the argslot up, to point to the just-copied block.
1.268 + __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
1.269 + // And adjust the argslot address to point at the deletion point.
1.270 + __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
1.271 +}
1.272 +
1.273 +#ifndef PRODUCT
1.274 +void trace_method_handle_stub(const char* adaptername,
1.275 + oop mh,
1.276 + intptr_t* entry_sp,
1.277 + intptr_t* saved_sp) {
1.278 + // called as a leaf from native code: do not block the JVM!
1.279 + printf("MH %s "PTR_FORMAT" "PTR_FORMAT" "INTX_FORMAT"\n", adaptername, mh, entry_sp, entry_sp - saved_sp);
1.280 +}
1.281 +#endif //PRODUCT
1.282 +
1.283 +// Generate an "entry" field for a method handle.
1.284 +// This determines how the method handle will respond to calls.
1.285 +void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
1.286 + // Here is the register state during an interpreted call,
1.287 + // as set up by generate_method_handle_interpreter_entry():
1.288 + // - rbx: garbage temp (was MethodHandle.invoke methodOop, unused)
1.289 + // - rcx: receiver method handle
1.290 + // - rax: method handle type (only used by the check_mtype entry point)
1.291 + // - rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
1.292 + // - rdx: garbage temp, can blow away
1.293 +
1.294 + Register rcx_recv = rcx;
1.295 + Register rax_argslot = rax;
1.296 + Register rbx_temp = rbx;
1.297 + Register rdx_temp = rdx;
1.298 +
1.299 + guarantee(java_dyn_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
1.300 +
1.301 + // some handy addresses
1.302 + Address rbx_method_fie( rbx, methodOopDesc::from_interpreted_offset() );
1.303 +
1.304 + Address rcx_mh_vmtarget( rcx_recv, java_dyn_MethodHandle::vmtarget_offset_in_bytes() );
1.305 + Address rcx_dmh_vmindex( rcx_recv, sun_dyn_DirectMethodHandle::vmindex_offset_in_bytes() );
1.306 +
1.307 + Address rcx_bmh_vmargslot( rcx_recv, sun_dyn_BoundMethodHandle::vmargslot_offset_in_bytes() );
1.308 + Address rcx_bmh_argument( rcx_recv, sun_dyn_BoundMethodHandle::argument_offset_in_bytes() );
1.309 +
1.310 + Address rcx_amh_vmargslot( rcx_recv, sun_dyn_AdapterMethodHandle::vmargslot_offset_in_bytes() );
1.311 + Address rcx_amh_argument( rcx_recv, sun_dyn_AdapterMethodHandle::argument_offset_in_bytes() );
1.312 + Address rcx_amh_conversion( rcx_recv, sun_dyn_AdapterMethodHandle::conversion_offset_in_bytes() );
1.313 + Address vmarg; // __ argument_address(vmargslot)
1.314 +
1.315 + int tag_offset = -1;
1.316 + if (TaggedStackInterpreter) {
1.317 + tag_offset = Interpreter::tag_offset_in_bytes() - Interpreter::value_offset_in_bytes();
1.318 + assert(tag_offset = wordSize, "stack grows as expected");
1.319 + }
1.320 +
1.321 + if (have_entry(ek)) {
1.322 + __ nop(); // empty stubs make SG sick
1.323 + return;
1.324 + }
1.325 +
1.326 + address interp_entry = __ pc();
1.327 + if (UseCompressedOops) __ unimplemented("UseCompressedOops");
1.328 +
1.329 +#ifndef PRODUCT
1.330 + if (TraceMethodHandles) {
1.331 + __ push(rax); __ push(rbx); __ push(rcx); __ push(rdx); __ push(rsi); __ push(rdi);
1.332 + __ lea(rax, Address(rsp, wordSize*6)); // entry_sp
1.333 + // arguments:
1.334 + __ push(rsi); // saved_sp
1.335 + __ push(rax); // entry_sp
1.336 + __ push(rcx); // mh
1.337 + __ push(rcx);
1.338 + __ movptr(Address(rsp, 0), (intptr_t)entry_name(ek));
1.339 + __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub), 4);
1.340 + __ pop(rdi); __ pop(rsi); __ pop(rdx); __ pop(rcx); __ pop(rbx); __ pop(rax);
1.341 + }
1.342 +#endif //PRODUCT
1.343 +
1.344 + switch ((int) ek) {
1.345 + case _check_mtype:
1.346 + {
1.347 + // this stub is special, because it requires a live mtype argument
1.348 + Register rax_mtype = rax;
1.349 +
1.350 + // emit WrongMethodType path first, to enable jccb back-branch
1.351 + Label wrong_method_type;
1.352 + __ bind(wrong_method_type);
1.353 + __ movptr(rdx_temp, ExternalAddress((address) &_entries[_wrong_method_type]));
1.354 + __ jmp(Address(rdx_temp, MethodHandleEntry::from_interpreted_entry_offset_in_bytes()));
1.355 + __ hlt();
1.356 +
1.357 + interp_entry = __ pc();
1.358 + __ check_method_handle_type(rax_mtype, rcx_recv, rdx_temp, wrong_method_type);
1.359 + // now rax_mtype is dead; subsequent stubs will use it as a temp
1.360 +
1.361 + __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1.362 + }
1.363 + break;
1.364 +
1.365 + case _wrong_method_type:
1.366 + {
1.367 + // this stub is special, because it requires a live mtype argument
1.368 + Register rax_mtype = rax;
1.369 +
1.370 + interp_entry = __ pc();
1.371 + __ push(rax_mtype); // required mtype
1.372 + __ push(rcx_recv); // random mh (1st stacked argument)
1.373 + __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
1.374 + }
1.375 + break;
1.376 +
1.377 + case _invokestatic_mh:
1.378 + case _invokespecial_mh:
1.379 + {
1.380 + Register rbx_method = rbx_temp;
1.381 + __ movptr(rbx_method, rcx_mh_vmtarget); // target is a methodOop
1.382 + __ verify_oop(rbx_method);
1.383 + // same as TemplateTable::invokestatic or invokespecial,
1.384 + // minus the CP setup and profiling:
1.385 + if (ek == _invokespecial_mh) {
1.386 + // Must load & check the first argument before entering the target method.
1.387 + __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
1.388 + __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
1.389 + __ null_check(rcx_recv);
1.390 + __ verify_oop(rcx_recv);
1.391 + }
1.392 + __ jmp(rbx_method_fie);
1.393 + }
1.394 + break;
1.395 +
1.396 + case _invokevirtual_mh:
1.397 + {
1.398 + // same as TemplateTable::invokevirtual,
1.399 + // minus the CP setup and profiling:
1.400 +
1.401 + // pick out the vtable index and receiver offset from the MH,
1.402 + // and then we can discard it:
1.403 + __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
1.404 + Register rbx_index = rbx_temp;
1.405 + __ movl(rbx_index, rcx_dmh_vmindex);
1.406 + // Note: The verifier allows us to ignore rcx_mh_vmtarget.
1.407 + __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
1.408 + __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
1.409 +
1.410 + // get receiver klass
1.411 + Register rax_klass = rax_argslot;
1.412 + __ load_klass(rax_klass, rcx_recv);
1.413 + __ verify_oop(rax_klass);
1.414 +
1.415 + // get target methodOop & entry point
1.416 + const int base = instanceKlass::vtable_start_offset() * wordSize;
1.417 + assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
1.418 + Address vtable_entry_addr(rax_klass,
1.419 + rbx_index, Address::times_ptr,
1.420 + base + vtableEntry::method_offset_in_bytes());
1.421 + Register rbx_method = rbx_temp;
1.422 + __ movl(rbx_method, vtable_entry_addr);
1.423 +
1.424 + __ verify_oop(rbx_method);
1.425 + __ jmp(rbx_method_fie);
1.426 + }
1.427 + break;
1.428 +
1.429 + case _invokeinterface_mh:
1.430 + {
1.431 + // same as TemplateTable::invokeinterface,
1.432 + // minus the CP setup and profiling:
1.433 +
1.434 + // pick out the interface and itable index from the MH.
1.435 + __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
1.436 + Register rdx_intf = rdx_temp;
1.437 + Register rbx_index = rbx_temp;
1.438 + __ movptr(rdx_intf, rcx_mh_vmtarget);
1.439 + __ movl(rbx_index, rcx_dmh_vmindex);
1.440 + __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
1.441 + __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
1.442 +
1.443 + // get receiver klass
1.444 + Register rax_klass = rax_argslot;
1.445 + __ load_klass(rax_klass, rcx_recv);
1.446 + __ verify_oop(rax_klass);
1.447 +
1.448 + Register rcx_temp = rcx_recv;
1.449 + Register rbx_method = rbx_index;
1.450 +
1.451 + // get interface klass
1.452 + Label no_such_interface;
1.453 + __ verify_oop(rdx_intf);
1.454 + __ lookup_interface_method(rax_klass, rdx_intf,
1.455 + // note: next two args must be the same:
1.456 + rbx_index, rbx_method,
1.457 + rcx_temp,
1.458 + no_such_interface);
1.459 +
1.460 + __ verify_oop(rbx_method);
1.461 + __ jmp(rbx_method_fie);
1.462 + __ hlt();
1.463 +
1.464 + __ bind(no_such_interface);
1.465 + // Throw an exception.
1.466 + // For historical reasons, it will be IncompatibleClassChangeError.
1.467 + __ should_not_reach_here(); // %%% FIXME NYI
1.468 + }
1.469 + break;
1.470 +
1.471 + case _bound_ref_mh:
1.472 + case _bound_int_mh:
1.473 + case _bound_long_mh:
1.474 + case _bound_ref_direct_mh:
1.475 + case _bound_int_direct_mh:
1.476 + case _bound_long_direct_mh:
1.477 + {
1.478 + bool direct_to_method = (ek >= _bound_ref_direct_mh);
1.479 + BasicType arg_type = T_ILLEGAL;
1.480 + if (ek == _bound_long_mh || ek == _bound_long_direct_mh) {
1.481 + arg_type = T_LONG;
1.482 + } else if (ek == _bound_int_mh || ek == _bound_int_direct_mh) {
1.483 + arg_type = T_INT;
1.484 + } else {
1.485 + assert(ek == _bound_ref_mh || ek == _bound_ref_direct_mh, "must be ref");
1.486 + arg_type = T_OBJECT;
1.487 + }
1.488 + int arg_slots = type2size[arg_type];
1.489 + int arg_mask = (arg_type == T_OBJECT ? _INSERT_REF_MASK :
1.490 + arg_slots == 1 ? _INSERT_INT_MASK : _INSERT_LONG_MASK);
1.491 +
1.492 + // make room for the new argument:
1.493 + __ movl(rax_argslot, rcx_bmh_vmargslot);
1.494 + __ lea(rax_argslot, __ argument_address(rax_argslot));
1.495 + insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask,
1.496 + rax_argslot, rbx_temp, rdx_temp);
1.497 +
1.498 + // store bound argument into the new stack slot:
1.499 + __ movptr(rbx_temp, rcx_bmh_argument);
1.500 + Address prim_value_addr(rbx_temp, java_lang_boxing_object::value_offset_in_bytes(arg_type));
1.501 + if (arg_type == T_OBJECT) {
1.502 + __ movptr(Address(rax_argslot, 0), rbx_temp);
1.503 + } else {
1.504 + __ load_sized_value(rbx_temp, prim_value_addr,
1.505 + type2aelembytes(arg_type), is_signed_subword_type(arg_type));
1.506 + __ movptr(Address(rax_argslot, 0), rbx_temp);
1.507 +#ifndef _LP64
1.508 + if (arg_slots == 2) {
1.509 + __ movl(rbx_temp, prim_value_addr.plus_disp(wordSize));
1.510 + __ movl(Address(rax_argslot, Interpreter::stackElementSize()), rbx_temp);
1.511 + }
1.512 +#endif //_LP64
1.513 + break;
1.514 + }
1.515 +
1.516 + if (direct_to_method) {
1.517 + Register rbx_method = rbx_temp;
1.518 + __ movptr(rbx_method, rcx_mh_vmtarget);
1.519 + __ verify_oop(rbx_method);
1.520 + __ jmp(rbx_method_fie);
1.521 + } else {
1.522 + __ movptr(rcx_recv, rcx_mh_vmtarget);
1.523 + __ verify_oop(rcx_recv);
1.524 + __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1.525 + }
1.526 + }
1.527 + break;
1.528 +
1.529 + case _adapter_retype_only:
1.530 + // immediately jump to the next MH layer:
1.531 + __ movptr(rcx_recv, rcx_mh_vmtarget);
1.532 + __ verify_oop(rcx_recv);
1.533 + __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1.534 + // This is OK when all parameter types widen.
1.535 + // It is also OK when a return type narrows.
1.536 + break;
1.537 +
1.538 + case _adapter_check_cast:
1.539 + {
1.540 + // temps:
1.541 + Register rbx_klass = rbx_temp; // interesting AMH data
1.542 +
1.543 + // check a reference argument before jumping to the next layer of MH:
1.544 + __ movl(rax_argslot, rcx_amh_vmargslot);
1.545 + vmarg = __ argument_address(rax_argslot);
1.546 +
1.547 + // What class are we casting to?
1.548 + __ movptr(rbx_klass, rcx_amh_argument); // this is a Class object!
1.549 + __ movptr(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
1.550 +
1.551 + // get the new MH:
1.552 + __ movptr(rcx_recv, rcx_mh_vmtarget);
1.553 + // (now we are done with the old MH)
1.554 +
1.555 + Label done;
1.556 + __ movptr(rdx_temp, vmarg);
1.557 + __ testl(rdx_temp, rdx_temp);
1.558 + __ jcc(Assembler::zero, done); // no cast if null
1.559 + __ load_klass(rdx_temp, rdx_temp);
1.560 +
1.561 + // live at this point:
1.562 + // - rbx_klass: klass required by the target method
1.563 + // - rdx_temp: argument klass to test
1.564 + // - rcx_recv: method handle to invoke (after cast succeeds)
1.565 + __ check_klass_subtype(rdx_temp, rbx_klass, rax_argslot, done);
1.566 +
1.567 + // If we get here, the type check failed!
1.568 + // Call the wrong_method_type stub, passing the failing argument type in rax.
1.569 + Register rax_mtype = rax_argslot;
1.570 + __ push(rbx_klass); // missed klass (required type)
1.571 + __ push(rdx_temp); // bad actual type (1st stacked argument)
1.572 + __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
1.573 +
1.574 + __ bind(done);
1.575 + __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1.576 + }
1.577 + break;
1.578 +
1.579 + case _adapter_prim_to_prim:
1.580 + case _adapter_ref_to_prim:
1.581 + // handled completely by optimized cases
1.582 + __ stop("init_AdapterMethodHandle should not issue this");
1.583 + break;
1.584 +
1.585 + case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
1.586 +//case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
1.587 + case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
1.588 + case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
1.589 + {
1.590 + // perform an in-place conversion to int or an int subword
1.591 + __ movl(rax_argslot, rcx_amh_vmargslot);
1.592 + vmarg = __ argument_address(rax_argslot);
1.593 +
1.594 + switch (ek) {
1.595 + case _adapter_opt_i2i:
1.596 + __ movl(rdx_temp, vmarg);
1.597 + break;
1.598 + case _adapter_opt_l2i:
1.599 + {
1.600 + // just delete the extra slot; on a little-endian machine we keep the first
1.601 + __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
1.602 + remove_arg_slots(_masm, -stack_move_unit(),
1.603 + rax_argslot, rbx_temp, rdx_temp);
1.604 + vmarg = Address(rax_argslot, -Interpreter::stackElementSize());
1.605 + __ movl(rdx_temp, vmarg);
1.606 + }
1.607 + break;
1.608 + case _adapter_opt_unboxi:
1.609 + {
1.610 + // Load the value up from the heap.
1.611 + __ movptr(rdx_temp, vmarg);
1.612 + int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
1.613 +#ifdef ASSERT
1.614 + for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
1.615 + if (is_subword_type(BasicType(bt)))
1.616 + assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
1.617 + }
1.618 +#endif
1.619 + __ null_check(rdx_temp, value_offset);
1.620 + __ movl(rdx_temp, Address(rdx_temp, value_offset));
1.621 + // We load this as a word. Because we are little-endian,
1.622 + // the low bits will be correct, but the high bits may need cleaning.
1.623 + // The vminfo will guide us to clean those bits.
1.624 + }
1.625 + break;
1.626 + default:
1.627 + assert(false, "");
1.628 + }
1.629 + goto finish_int_conversion;
1.630 + }
1.631 +
1.632 + finish_int_conversion:
1.633 + {
1.634 + Register rbx_vminfo = rbx_temp;
1.635 + __ movl(rbx_vminfo, rcx_amh_conversion);
1.636 + assert(CONV_VMINFO_SHIFT == 0, "preshifted");
1.637 +
1.638 + // get the new MH:
1.639 + __ movptr(rcx_recv, rcx_mh_vmtarget);
1.640 + // (now we are done with the old MH)
1.641 +
1.642 + // original 32-bit vmdata word must be of this form:
1.643 + // | MBZ:16 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
1.644 + __ xchgl(rcx, rbx_vminfo); // free rcx for shifts
1.645 + __ shll(rdx_temp /*, rcx*/);
1.646 + Label zero_extend, done;
1.647 + __ testl(rcx, CONV_VMINFO_SIGN_FLAG);
1.648 + __ jcc(Assembler::zero, zero_extend);
1.649 +
1.650 + // this path is taken for int->byte, int->short
1.651 + __ sarl(rdx_temp /*, rcx*/);
1.652 + __ jmp(done);
1.653 +
1.654 + __ bind(zero_extend);
1.655 + // this is taken for int->char
1.656 + __ shrl(rdx_temp /*, rcx*/);
1.657 +
1.658 + __ bind(done);
1.659 + __ movptr(vmarg, rdx_temp);
1.660 + __ xchgl(rcx, rbx_vminfo); // restore rcx_recv
1.661 +
1.662 + __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1.663 + }
1.664 + break;
1.665 +
1.666 + case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
1.667 + case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
1.668 + {
1.669 + // perform an in-place int-to-long or ref-to-long conversion
1.670 + __ movl(rax_argslot, rcx_amh_vmargslot);
1.671 +
1.672 + // on a little-endian machine we keep the first slot and add another after
1.673 + __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
1.674 + insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
1.675 + rax_argslot, rbx_temp, rdx_temp);
1.676 + Address vmarg1(rax_argslot, -Interpreter::stackElementSize());
1.677 + Address vmarg2 = vmarg1.plus_disp(Interpreter::stackElementSize());
1.678 +
1.679 + switch (ek) {
1.680 + case _adapter_opt_i2l:
1.681 + {
1.682 + __ movl(rdx_temp, vmarg1);
1.683 + __ sarl(rdx_temp, 31); // __ extend_sign()
1.684 + __ movl(vmarg2, rdx_temp); // store second word
1.685 + }
1.686 + break;
1.687 + case _adapter_opt_unboxl:
1.688 + {
1.689 + // Load the value up from the heap.
1.690 + __ movptr(rdx_temp, vmarg1);
1.691 + int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
1.692 + assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
1.693 + __ null_check(rdx_temp, value_offset);
1.694 + __ movl(rbx_temp, Address(rdx_temp, value_offset + 0*BytesPerInt));
1.695 + __ movl(rdx_temp, Address(rdx_temp, value_offset + 1*BytesPerInt));
1.696 + __ movl(vmarg1, rbx_temp);
1.697 + __ movl(vmarg2, rdx_temp);
1.698 + }
1.699 + break;
1.700 + default:
1.701 + assert(false, "");
1.702 + }
1.703 +
1.704 + __ movptr(rcx_recv, rcx_mh_vmtarget);
1.705 + __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1.706 + }
1.707 + break;
1.708 +
1.709 + case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
1.710 + case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
1.711 + {
1.712 + // perform an in-place floating primitive conversion
1.713 + __ movl(rax_argslot, rcx_amh_vmargslot);
1.714 + __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
1.715 + if (ek == _adapter_opt_f2d) {
1.716 + insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
1.717 + rax_argslot, rbx_temp, rdx_temp);
1.718 + }
1.719 + Address vmarg(rax_argslot, -Interpreter::stackElementSize());
1.720 +
1.721 +#ifdef _LP64
1.722 + if (ek == _adapter_opt_f2d) {
1.723 + __ movflt(xmm0, vmarg);
1.724 + __ cvtss2sd(xmm0, xmm0);
1.725 + __ movdbl(vmarg, xmm0);
1.726 + } else {
1.727 + __ movdbl(xmm0, vmarg);
1.728 + __ cvtsd2ss(xmm0, xmm0);
1.729 + __ movflt(vmarg, xmm0);
1.730 + }
1.731 +#else //_LP64
1.732 + if (ek == _adapter_opt_f2d) {
1.733 + __ fld_s(vmarg); // load float to ST0
1.734 + __ fstp_s(vmarg); // store single
1.735 + } else if (!TaggedStackInterpreter) {
1.736 + __ fld_d(vmarg); // load double to ST0
1.737 + __ fstp_s(vmarg); // store single
1.738 + } else {
1.739 + Address vmarg_tag = vmarg.plus_disp(tag_offset);
1.740 + Address vmarg2 = vmarg.plus_disp(Interpreter::stackElementSize());
1.741 + // vmarg2_tag does not participate in this code
1.742 + Register rbx_tag = rbx_temp;
1.743 + __ movl(rbx_tag, vmarg_tag); // preserve tag
1.744 + __ movl(rdx_temp, vmarg2); // get second word of double
1.745 + __ movl(vmarg_tag, rdx_temp); // align with first word
1.746 + __ fld_d(vmarg); // load double to ST0
1.747 + __ movl(vmarg_tag, rbx_tag); // restore tag
1.748 + __ fstp_s(vmarg); // store single
1.749 + }
1.750 +#endif //_LP64
1.751 +
1.752 + if (ek == _adapter_opt_d2f) {
1.753 + remove_arg_slots(_masm, -stack_move_unit(),
1.754 + rax_argslot, rbx_temp, rdx_temp);
1.755 + }
1.756 +
1.757 + __ movptr(rcx_recv, rcx_mh_vmtarget);
1.758 + __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1.759 + }
1.760 + break;
1.761 +
1.762 + case _adapter_prim_to_ref:
1.763 + __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1.764 + break;
1.765 +
1.766 + case _adapter_swap_args:
1.767 + case _adapter_rot_args:
1.768 + // handled completely by optimized cases
1.769 + __ stop("init_AdapterMethodHandle should not issue this");
1.770 + break;
1.771 +
1.772 + case _adapter_opt_swap_1:
1.773 + case _adapter_opt_swap_2:
1.774 + case _adapter_opt_rot_1_up:
1.775 + case _adapter_opt_rot_1_down:
1.776 + case _adapter_opt_rot_2_up:
1.777 + case _adapter_opt_rot_2_down:
1.778 + {
1.779 + int rotate = 0, swap_slots = 0;
1.780 + switch ((int)ek) {
1.781 + case _adapter_opt_swap_1: swap_slots = 1; break;
1.782 + case _adapter_opt_swap_2: swap_slots = 2; break;
1.783 + case _adapter_opt_rot_1_up: swap_slots = 1; rotate++; break;
1.784 + case _adapter_opt_rot_1_down: swap_slots = 1; rotate--; break;
1.785 + case _adapter_opt_rot_2_up: swap_slots = 2; rotate++; break;
1.786 + case _adapter_opt_rot_2_down: swap_slots = 2; rotate--; break;
1.787 + default: assert(false, "");
1.788 + }
1.789 +
1.790 + // the real size of the move must be doubled if TaggedStackInterpreter:
1.791 + int swap_bytes = (int)( swap_slots * Interpreter::stackElementWords() * wordSize );
1.792 +
1.793 + // 'argslot' is the position of the first argument to swap
1.794 + __ movl(rax_argslot, rcx_amh_vmargslot);
1.795 + __ lea(rax_argslot, __ argument_address(rax_argslot));
1.796 +
1.797 + // 'vminfo' is the second
1.798 + Register rbx_destslot = rbx_temp;
1.799 + __ movl(rbx_destslot, rcx_amh_conversion);
1.800 + assert(CONV_VMINFO_SHIFT == 0, "preshifted");
1.801 + __ andl(rbx_destslot, CONV_VMINFO_MASK);
1.802 + __ lea(rbx_destslot, __ argument_address(rbx_destslot));
1.803 + DEBUG_ONLY(verify_argslot(_masm, rbx_destslot, "swap point must fall within current frame"));
1.804 +
1.805 + if (!rotate) {
1.806 + for (int i = 0; i < swap_bytes; i += wordSize) {
1.807 + __ movptr(rdx_temp, Address(rax_argslot , i));
1.808 + __ push(rdx_temp);
1.809 + __ movptr(rdx_temp, Address(rbx_destslot, i));
1.810 + __ movptr(Address(rax_argslot, i), rdx_temp);
1.811 + __ pop(rdx_temp);
1.812 + __ movptr(Address(rbx_destslot, i), rdx_temp);
1.813 + }
1.814 + } else {
1.815 + // push the first chunk, which is going to get overwritten
1.816 + for (int i = swap_bytes; (i -= wordSize) >= 0; ) {
1.817 + __ movptr(rdx_temp, Address(rax_argslot, i));
1.818 + __ push(rdx_temp);
1.819 + }
1.820 +
1.821 + if (rotate > 0) {
1.822 + // rotate upward
1.823 + __ subptr(rax_argslot, swap_bytes);
1.824 +#ifdef ASSERT
1.825 + {
1.826 + // Verify that argslot > destslot, by at least swap_bytes.
1.827 + Label L_ok;
1.828 + __ cmpptr(rax_argslot, rbx_destslot);
1.829 + __ jcc(Assembler::aboveEqual, L_ok);
1.830 + __ stop("source must be above destination (upward rotation)");
1.831 + __ bind(L_ok);
1.832 + }
1.833 +#endif
1.834 + // work argslot down to destslot, copying contiguous data upwards
1.835 + // pseudo-code:
1.836 + // rax = src_addr - swap_bytes
1.837 + // rbx = dest_addr
1.838 + // while (rax >= rbx) *(rax + swap_bytes) = *(rax + 0), rax--;
1.839 + Label loop;
1.840 + __ bind(loop);
1.841 + __ movptr(rdx_temp, Address(rax_argslot, 0));
1.842 + __ movptr(Address(rax_argslot, swap_bytes), rdx_temp);
1.843 + __ addptr(rax_argslot, -wordSize);
1.844 + __ cmpptr(rax_argslot, rbx_destslot);
1.845 + __ jcc(Assembler::aboveEqual, loop);
1.846 + } else {
1.847 + __ addptr(rax_argslot, swap_bytes);
1.848 +#ifdef ASSERT
1.849 + {
1.850 + // Verify that argslot < destslot, by at least swap_bytes.
1.851 + Label L_ok;
1.852 + __ cmpptr(rax_argslot, rbx_destslot);
1.853 + __ jcc(Assembler::belowEqual, L_ok);
1.854 + __ stop("source must be below destination (downward rotation)");
1.855 + __ bind(L_ok);
1.856 + }
1.857 +#endif
1.858 + // work argslot up to destslot, copying contiguous data downwards
1.859 + // pseudo-code:
1.860 + // rax = src_addr + swap_bytes
1.861 + // rbx = dest_addr
1.862 + // while (rax <= rbx) *(rax - swap_bytes) = *(rax + 0), rax++;
1.863 + Label loop;
1.864 + __ bind(loop);
1.865 + __ movptr(rdx_temp, Address(rax_argslot, 0));
1.866 + __ movptr(Address(rax_argslot, -swap_bytes), rdx_temp);
1.867 + __ addptr(rax_argslot, wordSize);
1.868 + __ cmpptr(rax_argslot, rbx_destslot);
1.869 + __ jcc(Assembler::belowEqual, loop);
1.870 + }
1.871 +
1.872 + // pop the original first chunk into the destination slot, now free
1.873 + for (int i = 0; i < swap_bytes; i += wordSize) {
1.874 + __ pop(rdx_temp);
1.875 + __ movptr(Address(rbx_destslot, i), rdx_temp);
1.876 + }
1.877 + }
1.878 +
1.879 + __ movptr(rcx_recv, rcx_mh_vmtarget);
1.880 + __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1.881 + }
1.882 + break;
1.883 +
1.884 + case _adapter_dup_args:
1.885 + {
1.886 + // 'argslot' is the position of the first argument to duplicate
1.887 + __ movl(rax_argslot, rcx_amh_vmargslot);
1.888 + __ lea(rax_argslot, __ argument_address(rax_argslot));
1.889 +
1.890 + // 'stack_move' is negative number of words to duplicate
1.891 + Register rdx_stack_move = rdx_temp;
1.892 + __ movl(rdx_stack_move, rcx_amh_conversion);
1.893 + __ sarl(rdx_stack_move, CONV_STACK_MOVE_SHIFT);
1.894 +
1.895 + int argslot0_num = 0;
1.896 + Address argslot0 = __ argument_address(RegisterOrConstant(argslot0_num));
1.897 + assert(argslot0.base() == rsp, "");
1.898 + int pre_arg_size = argslot0.disp();
1.899 + assert(pre_arg_size % wordSize == 0, "");
1.900 + assert(pre_arg_size > 0, "must include PC");
1.901 +
1.902 + // remember the old rsp+1 (argslot[0])
1.903 + Register rbx_oldarg = rbx_temp;
1.904 + __ lea(rbx_oldarg, argslot0);
1.905 +
1.906 + // move rsp down to make room for dups
1.907 + __ lea(rsp, Address(rsp, rdx_stack_move, Address::times_ptr));
1.908 +
1.909 + // compute the new rsp+1 (argslot[0])
1.910 + Register rdx_newarg = rdx_temp;
1.911 + __ lea(rdx_newarg, argslot0);
1.912 +
1.913 + __ push(rdi); // need a temp
1.914 + // (preceding push must be done after arg addresses are taken!)
1.915 +
1.916 + // pull down the pre_arg_size data (PC)
1.917 + for (int i = -pre_arg_size; i < 0; i += wordSize) {
1.918 + __ movptr(rdi, Address(rbx_oldarg, i));
1.919 + __ movptr(Address(rdx_newarg, i), rdi);
1.920 + }
1.921 +
1.922 + // copy from rax_argslot[0...] down to new_rsp[1...]
1.923 + // pseudo-code:
1.924 + // rbx = old_rsp+1
1.925 + // rdx = new_rsp+1
1.926 + // rax = argslot
1.927 + // while (rdx < rbx) *rdx++ = *rax++
1.928 + Label loop;
1.929 + __ bind(loop);
1.930 + __ movptr(rdi, Address(rax_argslot, 0));
1.931 + __ movptr(Address(rdx_newarg, 0), rdi);
1.932 + __ addptr(rax_argslot, wordSize);
1.933 + __ addptr(rdx_newarg, wordSize);
1.934 + __ cmpptr(rdx_newarg, rbx_oldarg);
1.935 + __ jcc(Assembler::less, loop);
1.936 +
1.937 + __ pop(rdi); // restore temp
1.938 +
1.939 + __ movptr(rcx_recv, rcx_mh_vmtarget);
1.940 + __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1.941 + }
1.942 + break;
1.943 +
1.944 + case _adapter_drop_args:
1.945 + {
1.946 + // 'argslot' is the position of the first argument to nuke
1.947 + __ movl(rax_argslot, rcx_amh_vmargslot);
1.948 + __ lea(rax_argslot, __ argument_address(rax_argslot));
1.949 +
1.950 + __ push(rdi); // need a temp
1.951 + // (must do previous push after argslot address is taken)
1.952 +
1.953 + // 'stack_move' is number of words to drop
1.954 + Register rdi_stack_move = rdi;
1.955 + __ movl(rdi_stack_move, rcx_amh_conversion);
1.956 + __ sarl(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
1.957 + remove_arg_slots(_masm, rdi_stack_move,
1.958 + rax_argslot, rbx_temp, rdx_temp);
1.959 +
1.960 + __ pop(rdi); // restore temp
1.961 +
1.962 + __ movptr(rcx_recv, rcx_mh_vmtarget);
1.963 + __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1.964 + }
1.965 + break;
1.966 +
1.967 + case _adapter_collect_args:
1.968 + __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1.969 + break;
1.970 +
1.971 + case _adapter_spread_args:
1.972 + // handled completely by optimized cases
1.973 + __ stop("init_AdapterMethodHandle should not issue this");
1.974 + break;
1.975 +
1.976 + case _adapter_opt_spread_0:
1.977 + case _adapter_opt_spread_1:
1.978 + case _adapter_opt_spread_more:
1.979 + {
1.980 + // spread an array out into a group of arguments
1.981 + int length_constant = -1;
1.982 + switch (ek) {
1.983 + case _adapter_opt_spread_0: length_constant = 0; break;
1.984 + case _adapter_opt_spread_1: length_constant = 1; break;
1.985 + }
1.986 +
1.987 + // find the address of the array argument
1.988 + __ movl(rax_argslot, rcx_amh_vmargslot);
1.989 + __ lea(rax_argslot, __ argument_address(rax_argslot));
1.990 +
1.991 + // grab some temps
1.992 + { __ push(rsi); __ push(rdi); }
1.993 + // (preceding pushes must be done after argslot address is taken!)
1.994 +#define UNPUSH_RSI_RDI \
1.995 + { __ pop(rdi); __ pop(rsi); }
1.996 +
1.997 + // arx_argslot points both to the array and to the first output arg
1.998 + vmarg = Address(rax_argslot, 0);
1.999 +
1.1000 + // Get the array value.
1.1001 + Register rsi_array = rsi;
1.1002 + Register rdx_array_klass = rdx_temp;
1.1003 + BasicType elem_type = T_OBJECT;
1.1004 + int length_offset = arrayOopDesc::length_offset_in_bytes();
1.1005 + int elem0_offset = arrayOopDesc::base_offset_in_bytes(elem_type);
1.1006 + __ movptr(rsi_array, vmarg);
1.1007 + Label skip_array_check;
1.1008 + if (length_constant == 0) {
1.1009 + __ testptr(rsi_array, rsi_array);
1.1010 + __ jcc(Assembler::zero, skip_array_check);
1.1011 + }
1.1012 + __ null_check(rsi_array, oopDesc::klass_offset_in_bytes());
1.1013 + __ load_klass(rdx_array_klass, rsi_array);
1.1014 +
1.1015 + // Check the array type.
1.1016 + Register rbx_klass = rbx_temp;
1.1017 + __ movptr(rbx_klass, rcx_amh_argument); // this is a Class object!
1.1018 + __ movptr(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
1.1019 +
1.1020 + Label ok_array_klass, bad_array_klass, bad_array_length;
1.1021 + __ check_klass_subtype(rdx_array_klass, rbx_klass, rdi, ok_array_klass);
1.1022 + // If we get here, the type check failed!
1.1023 + __ jmp(bad_array_klass);
1.1024 + __ bind(ok_array_klass);
1.1025 +
1.1026 + // Check length.
1.1027 + if (length_constant >= 0) {
1.1028 + __ cmpl(Address(rsi_array, length_offset), length_constant);
1.1029 + } else {
1.1030 + Register rbx_vminfo = rbx_temp;
1.1031 + __ movl(rbx_vminfo, rcx_amh_conversion);
1.1032 + assert(CONV_VMINFO_SHIFT == 0, "preshifted");
1.1033 + __ andl(rbx_vminfo, CONV_VMINFO_MASK);
1.1034 + __ cmpl(rbx_vminfo, Address(rsi_array, length_offset));
1.1035 + }
1.1036 + __ jcc(Assembler::notEqual, bad_array_length);
1.1037 +
1.1038 + Register rdx_argslot_limit = rdx_temp;
1.1039 +
1.1040 + // Array length checks out. Now insert any required stack slots.
1.1041 + if (length_constant == -1) {
1.1042 + // Form a pointer to the end of the affected region.
1.1043 + __ lea(rdx_argslot_limit, Address(rax_argslot, Interpreter::stackElementSize()));
1.1044 + // 'stack_move' is negative number of words to insert
1.1045 + Register rdi_stack_move = rdi;
1.1046 + __ movl(rdi_stack_move, rcx_amh_conversion);
1.1047 + __ sarl(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
1.1048 + Register rsi_temp = rsi_array; // spill this
1.1049 + insert_arg_slots(_masm, rdi_stack_move, -1,
1.1050 + rax_argslot, rbx_temp, rsi_temp);
1.1051 + // reload the array (since rsi was killed)
1.1052 + __ movptr(rsi_array, vmarg);
1.1053 + } else if (length_constant > 1) {
1.1054 + int arg_mask = 0;
1.1055 + int new_slots = (length_constant - 1);
1.1056 + for (int i = 0; i < new_slots; i++) {
1.1057 + arg_mask <<= 1;
1.1058 + arg_mask |= _INSERT_REF_MASK;
1.1059 + }
1.1060 + insert_arg_slots(_masm, new_slots * stack_move_unit(), arg_mask,
1.1061 + rax_argslot, rbx_temp, rdx_temp);
1.1062 + } else if (length_constant == 1) {
1.1063 + // no stack resizing required
1.1064 + } else if (length_constant == 0) {
1.1065 + remove_arg_slots(_masm, -stack_move_unit(),
1.1066 + rax_argslot, rbx_temp, rdx_temp);
1.1067 + }
1.1068 +
1.1069 + // Copy from the array to the new slots.
1.1070 + // Note: Stack change code preserves integrity of rax_argslot pointer.
1.1071 + // So even after slot insertions, rax_argslot still points to first argument.
1.1072 + if (length_constant == -1) {
1.1073 + // [rax_argslot, rdx_argslot_limit) is the area we are inserting into.
1.1074 + Register rsi_source = rsi_array;
1.1075 + __ lea(rsi_source, Address(rsi_array, elem0_offset));
1.1076 + Label loop;
1.1077 + __ bind(loop);
1.1078 + __ movptr(rbx_temp, Address(rsi_source, 0));
1.1079 + __ movptr(Address(rax_argslot, 0), rbx_temp);
1.1080 + __ addptr(rsi_source, type2aelembytes(elem_type));
1.1081 + if (TaggedStackInterpreter) {
1.1082 + __ movptr(Address(rax_argslot, tag_offset),
1.1083 + frame::tag_for_basic_type(elem_type));
1.1084 + }
1.1085 + __ addptr(rax_argslot, Interpreter::stackElementSize());
1.1086 + __ cmpptr(rax_argslot, rdx_argslot_limit);
1.1087 + __ jcc(Assembler::less, loop);
1.1088 + } else if (length_constant == 0) {
1.1089 + __ bind(skip_array_check);
1.1090 + // nothing to copy
1.1091 + } else {
1.1092 + int elem_offset = elem0_offset;
1.1093 + int slot_offset = 0;
1.1094 + for (int index = 0; index < length_constant; index++) {
1.1095 + __ movptr(rbx_temp, Address(rsi_array, elem_offset));
1.1096 + __ movptr(Address(rax_argslot, slot_offset), rbx_temp);
1.1097 + elem_offset += type2aelembytes(elem_type);
1.1098 + if (TaggedStackInterpreter) {
1.1099 + __ movptr(Address(rax_argslot, slot_offset + tag_offset),
1.1100 + frame::tag_for_basic_type(elem_type));
1.1101 + }
1.1102 + slot_offset += Interpreter::stackElementSize();
1.1103 + }
1.1104 + }
1.1105 +
1.1106 + // Arguments are spread. Move to next method handle.
1.1107 + UNPUSH_RSI_RDI;
1.1108 + __ movptr(rcx_recv, rcx_mh_vmtarget);
1.1109 + __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1.1110 +
1.1111 + __ bind(bad_array_klass);
1.1112 + UNPUSH_RSI_RDI;
1.1113 + __ stop("bad array klass NYI");
1.1114 +
1.1115 + __ bind(bad_array_length);
1.1116 + UNPUSH_RSI_RDI;
1.1117 + __ stop("bad array length NYI");
1.1118 +
1.1119 +#undef UNPUSH_RSI_RDI
1.1120 + }
1.1121 + break;
1.1122 +
1.1123 + case _adapter_flyby:
1.1124 + case _adapter_ricochet:
1.1125 + __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1.1126 + break;
1.1127 +
1.1128 + default: ShouldNotReachHere();
1.1129 + }
1.1130 + __ hlt();
1.1131 +
1.1132 + address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
1.1133 + __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1.1134 +
1.1135 + init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
1.1136 +}
