void MethodHandles::verify_klass(MacroAssembler* _masm,
Register obj, SystemDictionary::WKID klass_id,
const char* error_message) {
InstanceKlass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id);
KlassHandle klass = SystemDictionary::well_known_klass(klass_id);
Register temp = rscratch2;
Register temp2 = rscratch1; // used by MacroAssembler::cmpptr
Label L_ok, L_bad;
BLOCK_COMMENT("verify_klass {");
__ verify_oop(obj);
__ cbz(obj, L_bad);
__ push(RegSet::of(temp, temp2), sp);
__ load_klass(temp, obj);
__ cmpptr(temp, ExternalAddress((address) klass_addr));
__ br(Assembler::EQ, L_ok);
intptr_t super_check_offset = klass->super_check_offset();
__ ldr(temp, Address(temp, super_check_offset));
__ cmpptr(temp, ExternalAddress((address) klass_addr));
__ br(Assembler::EQ, L_ok);
__ pop(RegSet::of(temp, temp2), sp);
__ bind(L_bad);
__ stop(error_message);
__ BIND(L_ok);
__ pop(RegSet::of(temp, temp2), sp);
BLOCK_COMMENT("} verify_klass");
}
void MethodHandles::verify_klass(MacroAssembler* _masm,
Register obj, SystemDictionary::WKID klass_id,
const char* error_message) {
Klass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id);
KlassHandle klass = SystemDictionary::well_known_klass(klass_id);
Register temp = rdi;
Register temp2 = noreg;
LP64_ONLY(temp2 = rscratch1); // used by MacroAssembler::cmpptr
Label L_ok, L_bad;
BLOCK_COMMENT("verify_klass {");
__ verify_oop(obj);
__ testptr(obj, obj);
__ jcc(Assembler::zero, L_bad);
__ push(temp); if (temp2 != noreg) __ push(temp2);
#define UNPUSH { if (temp2 != noreg) __ pop(temp2); __ pop(temp); }
__ load_klass(temp, obj);
__ cmpptr(temp, ExternalAddress((address) klass_addr));
__ jcc(Assembler::equal, L_ok);
intptr_t super_check_offset = klass->super_check_offset();
__ movptr(temp, Address(temp, super_check_offset));
__ cmpptr(temp, ExternalAddress((address) klass_addr));
__ jcc(Assembler::equal, L_ok);
UNPUSH;
__ bind(L_bad);
__ STOP(error_message);
__ BIND(L_ok);
UNPUSH;
BLOCK_COMMENT("} verify_klass");
}
// Helper to insert argument slots into the stack.
// arg_slots must be a multiple of stack_move_unit() and <= 0
void MethodHandles::insert_arg_slots(MacroAssembler* _masm,
RegisterOrConstant arg_slots,
int arg_mask,
Register rax_argslot,
Register rbx_temp, Register rdx_temp, Register temp3_reg) {
assert(temp3_reg == noreg, "temp3 not required");
assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
(!arg_slots.is_register() ? rsp : arg_slots.as_register()));
#ifdef ASSERT
verify_argslot(_masm, rax_argslot, "insertion point must fall within current frame");
if (arg_slots.is_register()) {
Label L_ok, L_bad;
__ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
__ jccb(Assembler::greater, L_bad);
__ testl(arg_slots.as_register(), -stack_move_unit() - 1);
__ jccb(Assembler::zero, L_ok);
__ bind(L_bad);
__ stop("assert arg_slots <= 0 and clear low bits");
__ bind(L_ok);
} else {
assert(arg_slots.as_constant() <= 0, "");
assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
}
#endif //ASSERT
#ifdef _LP64
if (arg_slots.is_register()) {
// clean high bits of stack motion register (was loaded as an int)
__ movslq(arg_slots.as_register(), arg_slots.as_register());
}
#endif
// Make space on the stack for the inserted argument(s).
// Then pull down everything shallower than rax_argslot.
// The stacked return address gets pulled down with everything else.
// That is, copy [rsp, argslot) downward by -size words. In pseudo-code:
// rsp -= size;
// for (rdx = rsp + size; rdx < argslot; rdx++)
// rdx[-size] = rdx[0]
// argslot -= size;
BLOCK_COMMENT("insert_arg_slots {");
__ mov(rdx_temp, rsp); // source pointer for copy
__ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
{
Label loop;
__ BIND(loop);
// pull one word down each time through the loop
__ movptr(rbx_temp, Address(rdx_temp, 0));
__ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
__ addptr(rdx_temp, wordSize);
__ cmpptr(rdx_temp, rax_argslot);
__ jccb(Assembler::less, loop);
}
// Now move the argslot down, to point to the opened-up space.
__ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
BLOCK_COMMENT("} insert_arg_slots");
}
static void verify_argslot(MacroAssembler* _masm, Register argslot_reg,
const char* error_message) {
// Verify that argslot lies within (rsp, rbp].
Label L_ok, L_bad;
BLOCK_COMMENT("{ verify_argslot");
__ cmpptr(argslot_reg, rbp);
__ jccb(Assembler::above, L_bad);
__ cmpptr(rsp, argslot_reg);
__ jccb(Assembler::below, L_ok);
__ bind(L_bad);
__ stop(error_message);
__ bind(L_ok);
BLOCK_COMMENT("} verify_argslot");
}
void G1PostBarrierStub::emit_code(LIR_Assembler* ce) {
__ bind(_entry);
assert(addr()->is_register(), "Precondition.");
assert(new_val()->is_register(), "Precondition.");
Register new_val_reg = new_val()->as_register();
__ cmpptr(new_val_reg, (int32_t) NULL_WORD);
__ jcc(Assembler::equal, _continuation);
ce->store_parameter(addr()->as_pointer_register(), 0);
__ call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_post_barrier_slow_id)));
__ jmp(_continuation);
}
void G1PreBarrierStub::emit_code(LIR_Assembler* ce) {
// At this point we know that marking is in progress
__ bind(_entry);
assert(pre_val()->is_register(), "Precondition.");
Register pre_val_reg = pre_val()->as_register();
ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false /*wide*/, false /*unaligned*/);
__ cmpptr(pre_val_reg, (int32_t) NULL_WORD);
__ jcc(Assembler::equal, _continuation);
ce->store_parameter(pre_val()->as_register(), 0);
__ call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_pre_barrier_slow_id)));
__ jmp(_continuation);
}
void MethodHandles::jump_to_lambda_form(MacroAssembler* _masm,
Register recv, Register method_temp,
Register temp2,
bool for_compiler_entry) {
BLOCK_COMMENT("jump_to_lambda_form {");
// This is the initial entry point of a lazy method handle.
// After type checking, it picks up the invoker from the LambdaForm.
assert_different_registers(recv, method_temp, temp2);
assert(recv != noreg, "required register");
assert(method_temp == rbx, "required register for loading method");
//NOT_PRODUCT({ FlagSetting fs(TraceMethodHandles, true); trace_method_handle(_masm, "LZMH"); });
// Load the invoker, as MH -> MH.form -> LF.vmentry
__ verify_oop(recv);
__ load_heap_oop(method_temp, Address(recv, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes())));
__ verify_oop(method_temp);
__ load_heap_oop(method_temp, Address(method_temp, NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes())));
__ verify_oop(method_temp);
// the following assumes that a Method* is normally compressed in the vmtarget field:
__ movptr(method_temp, Address(method_temp, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes())));
if (VerifyMethodHandles && !for_compiler_entry) {
// make sure recv is already on stack
__ movptr(temp2, Address(method_temp, Method::const_offset()));
__ load_sized_value(temp2,
Address(temp2, ConstMethod::size_of_parameters_offset()),
sizeof(u2), /*is_signed*/ false);
// assert(sizeof(u2) == sizeof(Method::_size_of_parameters), "");
Label L;
__ cmpptr(recv, __ argument_address(temp2, -1));
__ jcc(Assembler::equal, L);
__ movptr(rax, __ argument_address(temp2, -1));
__ STOP("receiver not on stack");
__ BIND(L);
}
jump_from_method_handle(_masm, method_temp, temp2, for_compiler_entry);
BLOCK_COMMENT("} jump_to_lambda_form");
}
void G1PreBarrierStub::emit_code(LIR_Assembler* ce) {
// At this point we know that marking is in progress.
// If do_load() is true then we have to emit the
// load of the previous value; otherwise it has already
// been loaded into _pre_val.
__ bind(_entry);
assert(pre_val()->is_register(), "Precondition.");
Register pre_val_reg = pre_val()->as_register();
if (do_load()) {
ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false /*wide*/, false /*unaligned*/);
}
__ cmpptr(pre_val_reg, (int32_t) NULL_WORD);
__ jcc(Assembler::equal, _continuation);
ce->store_parameter(pre_val()->as_register(), 0);
__ call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_pre_barrier_slow_id)));
__ jmp(_continuation);
}
void PatchingStub::emit_code(LIR_Assembler* ce) {
assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF, "not enough room for call");
Label call_patch;
// static field accesses have special semantics while the class
// initializer is being run so we emit a test which can be used to
// check that this code is being executed by the initializing
// thread.
address being_initialized_entry = __ pc();
if (CommentedAssembly) {
__ block_comment(" patch template");
}
if (_id == load_klass_id) {
// produce a copy of the load klass instruction for use by the being initialized case
address start = __ pc();
jobject o = NULL;
__ movoop(_obj, o);
#ifdef ASSERT
for (int i = 0; i < _bytes_to_copy; i++) {
address ptr = (address)(_pc_start + i);
int a_byte = (*ptr) & 0xFF;
assert(a_byte == *start++, "should be the same code");
}
#endif
} else {
// make a copy the code which is going to be patched.
for ( int i = 0; i < _bytes_to_copy; i++) {
address ptr = (address)(_pc_start + i);
int a_byte = (*ptr) & 0xFF;
__ a_byte (a_byte);
*ptr = 0x90; // make the site look like a nop
}
}
address end_of_patch = __ pc();
int bytes_to_skip = 0;
if (_id == load_klass_id) {
int offset = __ offset();
if (CommentedAssembly) {
__ block_comment(" being_initialized check");
}
assert(_obj != noreg, "must be a valid register");
Register tmp = rax;
Register tmp2 = rbx;
__ push(tmp);
__ push(tmp2);
__ load_heap_oop(tmp2, Address(_obj, java_lang_Class::klass_offset_in_bytes()));
__ get_thread(tmp);
__ cmpptr(tmp, Address(tmp2, instanceKlass::init_thread_offset_in_bytes() + sizeof(klassOopDesc)));
__ pop(tmp2);
__ pop(tmp);
__ jcc(Assembler::notEqual, call_patch);
// access_field patches may execute the patched code before it's
// copied back into place so we need to jump back into the main
// code of the nmethod to continue execution.
__ jmp(_patch_site_continuation);
// make sure this extra code gets skipped
bytes_to_skip += __ offset() - offset;
}
if (CommentedAssembly) {
__ block_comment("patch data encoded as movl");
}
// Now emit the patch record telling the runtime how to find the
// pieces of the patch. We only need 3 bytes but for readability of
// the disassembly we make the data look like a movl reg, imm32,
// which requires 5 bytes
int sizeof_patch_record = 5;
bytes_to_skip += sizeof_patch_record;
// emit the offsets needed to find the code to patch
int being_initialized_entry_offset = __ pc() - being_initialized_entry + sizeof_patch_record;
__ a_byte(0xB8);
__ a_byte(0);
__ a_byte(being_initialized_entry_offset);
__ a_byte(bytes_to_skip);
__ a_byte(_bytes_to_copy);
address patch_info_pc = __ pc();
assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info");
address entry = __ pc();
NativeGeneralJump::insert_unconditional((address)_pc_start, entry);
address target = NULL;
switch (_id) {
case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break;
case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); break;
default: ShouldNotReachHere();
}
__ bind(call_patch);
if (CommentedAssembly) {
__ block_comment("patch entry point");
}
__ call(RuntimeAddress(target));
assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change");
ce->add_call_info_here(_info);
int jmp_off = __ offset();
__ jmp(_patch_site_entry);
// Add enough nops so deoptimization can overwrite the jmp above with a call
// and not destroy the world.
for (int j = __ offset() ; j < jmp_off + 5 ; j++ ) {
__ nop();
}
if (_id == load_klass_id) {
CodeSection* cs = __ code_section();
RelocIterator iter(cs, (address)_pc_start, (address)(_pc_start + 1));
relocInfo::change_reloc_info_for_address(&iter, (address) _pc_start, relocInfo::oop_type, relocInfo::none);
}
}
VtableStub* VtableStubs::create_itable_stub(int itable_index) {
// Note well: pd_code_size_limit is the absolute minimum we can get
// away with. If you add code here, bump the code stub size
// returned by pd_code_size_limit!
const int amd64_code_length = VtableStub::pd_code_size_limit(false);
VtableStub* s = new(amd64_code_length) VtableStub(false, itable_index);
ResourceMark rm;
CodeBuffer cb(s->entry_point(), amd64_code_length);
MacroAssembler* masm = new MacroAssembler(&cb);
#ifndef PRODUCT
if (CountCompiledCalls) {
__ incrementl(ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr()));
}
#endif
// Entry arguments:
// rax: Interface
// j_rarg0: Receiver
// Free registers (non-args) are rax (interface), rbx
// get receiver (need to skip return address on top of stack)
assert(VtableStub::receiver_location() == j_rarg0->as_VMReg(), "receiver expected in j_rarg0");
// get receiver klass (also an implicit null-check)
address npe_addr = __ pc();
// Most registers are in use; we'll use rax, rbx, r10, r11
// (various calling sequences use r[cd]x, r[sd]i, r[89]; stay away from them)
__ load_klass(r10, j_rarg0);
// If we take a trap while this arg is on the stack we will not
// be able to walk the stack properly. This is not an issue except
// when there are mistakes in this assembly code that could generate
// a spurious fault. Ask me how I know...
const Register method = rbx;
Label throw_icce;
// Get methodOop and entrypoint for compiler
__ lookup_interface_method(// inputs: rec. class, interface, itable index
r10, rax, itable_index,
// outputs: method, scan temp. reg
method, r11,
throw_icce);
// method (rbx): methodOop
// j_rarg0: receiver
#ifdef ASSERT
if (DebugVtables) {
Label L2;
__ cmpptr(method, (int32_t)NULL_WORD);
__ jcc(Assembler::equal, L2);
__ cmpptr(Address(method, methodOopDesc::from_compiled_offset()), (int32_t)NULL_WORD);
__ jcc(Assembler::notZero, L2);
__ stop("compiler entrypoint is null");
__ bind(L2);
}
#endif // ASSERT
// rbx: methodOop
// j_rarg0: receiver
address ame_addr = __ pc();
__ jmp(Address(method, methodOopDesc::from_compiled_offset()));
__ bind(throw_icce);
__ jump(RuntimeAddress(StubRoutines::throw_IncompatibleClassChangeError_entry()));
__ flush();
if (PrintMiscellaneous && (WizardMode || Verbose)) {
tty->print_cr("itable #%d at "PTR_FORMAT"[%d] left over: %d",
itable_index, s->entry_point(),
(int)(s->code_end() - s->entry_point()),
(int)(s->code_end() - __ pc()));
}
guarantee(__ pc() <= s->code_end(), "overflowed buffer");
// shut the door on sizing bugs
int slop = 3; // 32-bit offset is this much larger than an 8-bit one
assert(itable_index > 10 || __ pc() + slop <= s->code_end(), "room for 32-bit offset");
s->set_exception_points(npe_addr, ame_addr);
return s;
}
// Code generation
address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm) {
// rbx: methodOop
// rcx: receiver method handle (must load from sp[MethodTypeForm.vmslots])
// rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
// rdx, rdi: garbage temp, blown away
Register rbx_method = rbx;
Register rcx_recv = rcx;
Register rax_mtype = rax;
Register rdx_temp = rdx;
Register rdi_temp = rdi;
// emit WrongMethodType path first, to enable jccb back-branch from main path
Label wrong_method_type;
__ bind(wrong_method_type);
Label invoke_generic_slow_path;
assert(methodOopDesc::intrinsic_id_size_in_bytes() == sizeof(u1), "");;
__ cmpb(Address(rbx_method, methodOopDesc::intrinsic_id_offset_in_bytes()), (int) vmIntrinsics::_invokeExact);
__ jcc(Assembler::notEqual, invoke_generic_slow_path);
__ push(rax_mtype); // required mtype
__ push(rcx_recv); // bad mh (1st stacked argument)
__ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
// here's where control starts out:
__ align(CodeEntryAlignment);
address entry_point = __ pc();
// fetch the MethodType from the method handle into rax (the 'check' register)
{
Register tem = rbx_method;
for (jint* pchase = methodOopDesc::method_type_offsets_chain(); (*pchase) != -1; pchase++) {
__ movptr(rax_mtype, Address(tem, *pchase));
tem = rax_mtype; // in case there is another indirection
}
}
// given the MethodType, find out where the MH argument is buried
__ load_heap_oop(rdx_temp, Address(rax_mtype, __ delayed_value(java_lang_invoke_MethodType::form_offset_in_bytes, rdi_temp)));
Register rdx_vmslots = rdx_temp;
__ movl(rdx_vmslots, Address(rdx_temp, __ delayed_value(java_lang_invoke_MethodTypeForm::vmslots_offset_in_bytes, rdi_temp)));
__ movptr(rcx_recv, __ argument_address(rdx_vmslots));
trace_method_handle(_masm, "invokeExact");
__ check_method_handle_type(rax_mtype, rcx_recv, rdi_temp, wrong_method_type);
__ jump_to_method_handle_entry(rcx_recv, rdi_temp);
// for invokeGeneric (only), apply argument and result conversions on the fly
__ bind(invoke_generic_slow_path);
#ifdef ASSERT
{ Label L;
__ cmpb(Address(rbx_method, methodOopDesc::intrinsic_id_offset_in_bytes()), (int) vmIntrinsics::_invokeGeneric);
__ jcc(Assembler::equal, L);
__ stop("bad methodOop::intrinsic_id");
__ bind(L);
}
#endif //ASSERT
Register rbx_temp = rbx_method; // don't need it now
// make room on the stack for another pointer:
Register rcx_argslot = rcx_recv;
__ lea(rcx_argslot, __ argument_address(rdx_vmslots, 1));
insert_arg_slots(_masm, 2 * stack_move_unit(), _INSERT_REF_MASK,
rcx_argslot, rbx_temp, rdx_temp);
// load up an adapter from the calling type (Java weaves this)
__ load_heap_oop(rdx_temp, Address(rax_mtype, __ delayed_value(java_lang_invoke_MethodType::form_offset_in_bytes, rdi_temp)));
Register rdx_adapter = rdx_temp;
// __ load_heap_oop(rdx_adapter, Address(rdx_temp, java_lang_invoke_MethodTypeForm::genericInvoker_offset_in_bytes()));
// deal with old JDK versions:
__ lea(rdi_temp, Address(rdx_temp, __ delayed_value(java_lang_invoke_MethodTypeForm::genericInvoker_offset_in_bytes, rdi_temp)));
__ cmpptr(rdi_temp, rdx_temp);
Label sorry_no_invoke_generic;
__ jcc(Assembler::below, sorry_no_invoke_generic);
__ load_heap_oop(rdx_adapter, Address(rdi_temp, 0));
__ testptr(rdx_adapter, rdx_adapter);
__ jcc(Assembler::zero, sorry_no_invoke_generic);
__ movptr(Address(rcx_argslot, 1 * Interpreter::stackElementSize), rdx_adapter);
// As a trusted first argument, pass the type being called, so the adapter knows
// the actual types of the arguments and return values.
// (Generic invokers are shared among form-families of method-type.)
__ movptr(Address(rcx_argslot, 0 * Interpreter::stackElementSize), rax_mtype);
// FIXME: assert that rdx_adapter is of the right method-type.
__ mov(rcx, rdx_adapter);
trace_method_handle(_masm, "invokeGeneric");
__ jump_to_method_handle_entry(rcx, rdi_temp);
__ bind(sorry_no_invoke_generic); // no invokeGeneric implementation available!
__ movptr(rcx_recv, Address(rcx_argslot, -1 * Interpreter::stackElementSize)); // recover original MH
__ push(rax_mtype); // required mtype
__ push(rcx_recv); // bad mh (1st stacked argument)
__ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
return entry_point;
}
//------------------------------------------------------------------------------
// MethodHandles::generate_method_handle_stub
//
// Generate an "entry" field for a method handle.
// This determines how the method handle will respond to calls.
void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
// Here is the register state during an interpreted call,
// as set up by generate_method_handle_interpreter_entry():
// - rbx: garbage temp (was MethodHandle.invoke methodOop, unused)
// - rcx: receiver method handle
// - rax: method handle type (only used by the check_mtype entry point)
// - rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
// - rdx: garbage temp, can blow away
const Register rcx_recv = rcx;
const Register rax_argslot = rax;
const Register rbx_temp = rbx;
const Register rdx_temp = rdx;
// This guy is set up by prepare_to_jump_from_interpreted (from interpreted calls)
// and gen_c2i_adapter (from compiled calls):
const Register saved_last_sp = LP64_ONLY(r13) NOT_LP64(rsi);
// Argument registers for _raise_exception.
// 32-bit: Pass first two oop/int args in registers ECX and EDX.
const Register rarg0_code = LP64_ONLY(j_rarg0) NOT_LP64(rcx);
const Register rarg1_actual = LP64_ONLY(j_rarg1) NOT_LP64(rdx);
const Register rarg2_required = LP64_ONLY(j_rarg2) NOT_LP64(rdi);
assert_different_registers(rarg0_code, rarg1_actual, rarg2_required, saved_last_sp);
guarantee(java_lang_invoke_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
// some handy addresses
Address rbx_method_fie( rbx, methodOopDesc::from_interpreted_offset() );
Address rbx_method_fce( rbx, methodOopDesc::from_compiled_offset() );
Address rcx_mh_vmtarget( rcx_recv, java_lang_invoke_MethodHandle::vmtarget_offset_in_bytes() );
Address rcx_dmh_vmindex( rcx_recv, java_lang_invoke_DirectMethodHandle::vmindex_offset_in_bytes() );
Address rcx_bmh_vmargslot( rcx_recv, java_lang_invoke_BoundMethodHandle::vmargslot_offset_in_bytes() );
Address rcx_bmh_argument( rcx_recv, java_lang_invoke_BoundMethodHandle::argument_offset_in_bytes() );
Address rcx_amh_vmargslot( rcx_recv, java_lang_invoke_AdapterMethodHandle::vmargslot_offset_in_bytes() );
Address rcx_amh_argument( rcx_recv, java_lang_invoke_AdapterMethodHandle::argument_offset_in_bytes() );
Address rcx_amh_conversion( rcx_recv, java_lang_invoke_AdapterMethodHandle::conversion_offset_in_bytes() );
Address vmarg; // __ argument_address(vmargslot)
const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
if (have_entry(ek)) {
__ nop(); // empty stubs make SG sick
return;
}
address interp_entry = __ pc();
trace_method_handle(_masm, entry_name(ek));
BLOCK_COMMENT(entry_name(ek));
switch ((int) ek) {
case _raise_exception:
{
// Not a real MH entry, but rather shared code for raising an
// exception. Since we use the compiled entry, arguments are
// expected in compiler argument registers.
assert(raise_exception_method(), "must be set");
assert(raise_exception_method()->from_compiled_entry(), "method must be linked");
const Register rdi_pc = rax;
__ pop(rdi_pc); // caller PC
__ mov(rsp, saved_last_sp); // cut the stack back to where the caller started
Register rbx_method = rbx_temp;
Label L_no_method;
// FIXME: fill in _raise_exception_method with a suitable java.lang.invoke method
__ movptr(rbx_method, ExternalAddress((address) &_raise_exception_method));
__ testptr(rbx_method, rbx_method);
__ jccb(Assembler::zero, L_no_method);
const int jobject_oop_offset = 0;
__ movptr(rbx_method, Address(rbx_method, jobject_oop_offset)); // dereference the jobject
__ testptr(rbx_method, rbx_method);
__ jccb(Assembler::zero, L_no_method);
__ verify_oop(rbx_method);
NOT_LP64(__ push(rarg2_required));
__ push(rdi_pc); // restore caller PC
__ jmp(rbx_method_fce); // jump to compiled entry
// Do something that is at least causes a valid throw from the interpreter.
__ bind(L_no_method);
__ push(rarg2_required);
__ push(rarg1_actual);
__ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
}
break;
case _invokestatic_mh:
case _invokespecial_mh:
{
Register rbx_method = rbx_temp;
__ load_heap_oop(rbx_method, rcx_mh_vmtarget); // target is a methodOop
__ verify_oop(rbx_method);
// same as TemplateTable::invokestatic or invokespecial,
// minus the CP setup and profiling:
if (ek == _invokespecial_mh) {
// Must load & check the first argument before entering the target method.
__ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
__ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
__ null_check(rcx_recv);
__ verify_oop(rcx_recv);
}
__ jmp(rbx_method_fie);
}
break;
case _invokevirtual_mh:
{
// same as TemplateTable::invokevirtual,
// minus the CP setup and profiling:
// pick out the vtable index and receiver offset from the MH,
// and then we can discard it:
__ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
Register rbx_index = rbx_temp;
__ movl(rbx_index, rcx_dmh_vmindex);
// Note: The verifier allows us to ignore rcx_mh_vmtarget.
__ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
__ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
// get receiver klass
Register rax_klass = rax_argslot;
__ load_klass(rax_klass, rcx_recv);
__ verify_oop(rax_klass);
// get target methodOop & entry point
const int base = instanceKlass::vtable_start_offset() * wordSize;
assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
Address vtable_entry_addr(rax_klass,
rbx_index, Address::times_ptr,
base + vtableEntry::method_offset_in_bytes());
Register rbx_method = rbx_temp;
__ movptr(rbx_method, vtable_entry_addr);
__ verify_oop(rbx_method);
__ jmp(rbx_method_fie);
}
break;
case _invokeinterface_mh:
{
// same as TemplateTable::invokeinterface,
// minus the CP setup and profiling:
// pick out the interface and itable index from the MH.
__ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
Register rdx_intf = rdx_temp;
Register rbx_index = rbx_temp;
__ load_heap_oop(rdx_intf, rcx_mh_vmtarget);
__ movl(rbx_index, rcx_dmh_vmindex);
__ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
__ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
// get receiver klass
Register rax_klass = rax_argslot;
__ load_klass(rax_klass, rcx_recv);
__ verify_oop(rax_klass);
Register rdi_temp = rdi;
Register rbx_method = rbx_index;
// get interface klass
Label no_such_interface;
__ verify_oop(rdx_intf);
__ lookup_interface_method(rax_klass, rdx_intf,
// note: next two args must be the same:
rbx_index, rbx_method,
rdi_temp,
no_such_interface);
__ verify_oop(rbx_method);
__ jmp(rbx_method_fie);
__ hlt();
__ bind(no_such_interface);
// Throw an exception.
// For historical reasons, it will be IncompatibleClassChangeError.
__ mov(rbx_temp, rcx_recv); // rarg2_required might be RCX
assert_different_registers(rarg2_required, rbx_temp);
__ movptr(rarg2_required, Address(rdx_intf, java_mirror_offset)); // required interface
__ mov( rarg1_actual, rbx_temp); // bad receiver
__ movl( rarg0_code, (int) Bytecodes::_invokeinterface); // who is complaining?
__ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
}
break;
case _bound_ref_mh:
case _bound_int_mh:
case _bound_long_mh:
case _bound_ref_direct_mh:
case _bound_int_direct_mh:
case _bound_long_direct_mh:
{
bool direct_to_method = (ek >= _bound_ref_direct_mh);
BasicType arg_type = T_ILLEGAL;
int arg_mask = _INSERT_NO_MASK;
int arg_slots = -1;
get_ek_bound_mh_info(ek, arg_type, arg_mask, arg_slots);
// make room for the new argument:
__ movl(rax_argslot, rcx_bmh_vmargslot);
__ lea(rax_argslot, __ argument_address(rax_argslot));
insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask, rax_argslot, rbx_temp, rdx_temp);
// store bound argument into the new stack slot:
__ load_heap_oop(rbx_temp, rcx_bmh_argument);
if (arg_type == T_OBJECT) {
__ movptr(Address(rax_argslot, 0), rbx_temp);
} else {
Address prim_value_addr(rbx_temp, java_lang_boxing_object::value_offset_in_bytes(arg_type));
const int arg_size = type2aelembytes(arg_type);
__ load_sized_value(rdx_temp, prim_value_addr, arg_size, is_signed_subword_type(arg_type), rbx_temp);
__ store_sized_value(Address(rax_argslot, 0), rdx_temp, arg_size, rbx_temp);
}
if (direct_to_method) {
Register rbx_method = rbx_temp;
__ load_heap_oop(rbx_method, rcx_mh_vmtarget);
__ verify_oop(rbx_method);
__ jmp(rbx_method_fie);
} else {
__ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
__ verify_oop(rcx_recv);
__ jump_to_method_handle_entry(rcx_recv, rdx_temp);
}
}
break;
case _adapter_retype_only:
case _adapter_retype_raw:
// immediately jump to the next MH layer:
__ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
__ verify_oop(rcx_recv);
__ jump_to_method_handle_entry(rcx_recv, rdx_temp);
// This is OK when all parameter types widen.
// It is also OK when a return type narrows.
break;
case _adapter_check_cast:
{
// temps:
Register rbx_klass = rbx_temp; // interesting AMH data
// check a reference argument before jumping to the next layer of MH:
__ movl(rax_argslot, rcx_amh_vmargslot);
vmarg = __ argument_address(rax_argslot);
// What class are we casting to?
__ load_heap_oop(rbx_klass, rcx_amh_argument); // this is a Class object!
__ load_heap_oop(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
Label done;
__ movptr(rdx_temp, vmarg);
__ testptr(rdx_temp, rdx_temp);
__ jcc(Assembler::zero, done); // no cast if null
__ load_klass(rdx_temp, rdx_temp);
// live at this point:
// - rbx_klass: klass required by the target method
// - rdx_temp: argument klass to test
// - rcx_recv: adapter method handle
__ check_klass_subtype(rdx_temp, rbx_klass, rax_argslot, done);
// If we get here, the type check failed!
// Call the wrong_method_type stub, passing the failing argument type in rax.
Register rax_mtype = rax_argslot;
__ movl(rax_argslot, rcx_amh_vmargslot); // reload argslot field
__ movptr(rdx_temp, vmarg);
assert_different_registers(rarg2_required, rdx_temp);
__ load_heap_oop(rarg2_required, rcx_amh_argument); // required class
__ mov( rarg1_actual, rdx_temp); // bad object
__ movl( rarg0_code, (int) Bytecodes::_checkcast); // who is complaining?
__ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
__ bind(done);
// get the new MH:
__ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
__ jump_to_method_handle_entry(rcx_recv, rdx_temp);
}
break;
case _adapter_prim_to_prim:
case _adapter_ref_to_prim:
// handled completely by optimized cases
__ stop("init_AdapterMethodHandle should not issue this");
break;
case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
//case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
{
// perform an in-place conversion to int or an int subword
__ movl(rax_argslot, rcx_amh_vmargslot);
vmarg = __ argument_address(rax_argslot);
switch (ek) {
case _adapter_opt_i2i:
__ movl(rdx_temp, vmarg);
break;
case _adapter_opt_l2i:
{
// just delete the extra slot; on a little-endian machine we keep the first
__ lea(rax_argslot, __ argument_address(rax_argslot, 1));
remove_arg_slots(_masm, -stack_move_unit(),
rax_argslot, rbx_temp, rdx_temp);
vmarg = Address(rax_argslot, -Interpreter::stackElementSize);
__ movl(rdx_temp, vmarg);
}
break;
case _adapter_opt_unboxi:
{
// Load the value up from the heap.
__ movptr(rdx_temp, vmarg);
int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
#ifdef ASSERT
for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
if (is_subword_type(BasicType(bt)))
assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
}
#endif
__ null_check(rdx_temp, value_offset);
__ movl(rdx_temp, Address(rdx_temp, value_offset));
// We load this as a word. Because we are little-endian,
// the low bits will be correct, but the high bits may need cleaning.
// The vminfo will guide us to clean those bits.
}
break;
default:
ShouldNotReachHere();
}
// Do the requested conversion and store the value.
Register rbx_vminfo = rbx_temp;
__ movl(rbx_vminfo, rcx_amh_conversion);
assert(CONV_VMINFO_SHIFT == 0, "preshifted");
// get the new MH:
__ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
// (now we are done with the old MH)
// original 32-bit vmdata word must be of this form:
// | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
__ xchgptr(rcx, rbx_vminfo); // free rcx for shifts
__ shll(rdx_temp /*, rcx*/);
Label zero_extend, done;
__ testl(rcx, CONV_VMINFO_SIGN_FLAG);
__ jccb(Assembler::zero, zero_extend);
// this path is taken for int->byte, int->short
__ sarl(rdx_temp /*, rcx*/);
__ jmpb(done);
__ bind(zero_extend);
// this is taken for int->char
__ shrl(rdx_temp /*, rcx*/);
__ bind(done);
__ movl(vmarg, rdx_temp); // Store the value.
__ xchgptr(rcx, rbx_vminfo); // restore rcx_recv
__ jump_to_method_handle_entry(rcx_recv, rdx_temp);
}
break;
case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
{
// perform an in-place int-to-long or ref-to-long conversion
__ movl(rax_argslot, rcx_amh_vmargslot);
// on a little-endian machine we keep the first slot and add another after
__ lea(rax_argslot, __ argument_address(rax_argslot, 1));
insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
rax_argslot, rbx_temp, rdx_temp);
Address vmarg1(rax_argslot, -Interpreter::stackElementSize);
Address vmarg2 = vmarg1.plus_disp(Interpreter::stackElementSize);
switch (ek) {
case _adapter_opt_i2l:
{
#ifdef _LP64
__ movslq(rdx_temp, vmarg1); // Load sign-extended
__ movq(vmarg1, rdx_temp); // Store into first slot
#else
__ movl(rdx_temp, vmarg1);
__ sarl(rdx_temp, BitsPerInt - 1); // __ extend_sign()
__ movl(vmarg2, rdx_temp); // store second word
#endif
}
break;
case _adapter_opt_unboxl:
{
// Load the value up from the heap.
__ movptr(rdx_temp, vmarg1);
int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
__ null_check(rdx_temp, value_offset);
#ifdef _LP64
__ movq(rbx_temp, Address(rdx_temp, value_offset));
__ movq(vmarg1, rbx_temp);
#else
__ movl(rbx_temp, Address(rdx_temp, value_offset + 0*BytesPerInt));
__ movl(rdx_temp, Address(rdx_temp, value_offset + 1*BytesPerInt));
__ movl(vmarg1, rbx_temp);
__ movl(vmarg2, rdx_temp);
#endif
}
break;
default:
ShouldNotReachHere();
}
__ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
__ jump_to_method_handle_entry(rcx_recv, rdx_temp);
}
break;
case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
{
// perform an in-place floating primitive conversion
__ movl(rax_argslot, rcx_amh_vmargslot);
__ lea(rax_argslot, __ argument_address(rax_argslot, 1));
if (ek == _adapter_opt_f2d) {
insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
rax_argslot, rbx_temp, rdx_temp);
}
Address vmarg(rax_argslot, -Interpreter::stackElementSize);
#ifdef _LP64
if (ek == _adapter_opt_f2d) {
__ movflt(xmm0, vmarg);
__ cvtss2sd(xmm0, xmm0);
__ movdbl(vmarg, xmm0);
} else {
__ movdbl(xmm0, vmarg);
__ cvtsd2ss(xmm0, xmm0);
__ movflt(vmarg, xmm0);
}
#else //_LP64
if (ek == _adapter_opt_f2d) {
__ fld_s(vmarg); // load float to ST0
__ fstp_s(vmarg); // store single
} else {
__ fld_d(vmarg); // load double to ST0
__ fstp_s(vmarg); // store single
}
#endif //_LP64
if (ek == _adapter_opt_d2f) {
remove_arg_slots(_masm, -stack_move_unit(),
rax_argslot, rbx_temp, rdx_temp);
}
__ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
__ jump_to_method_handle_entry(rcx_recv, rdx_temp);
}
break;
case _adapter_prim_to_ref:
__ unimplemented(entry_name(ek)); // %%% FIXME: NYI
break;
case _adapter_swap_args:
case _adapter_rot_args:
// handled completely by optimized cases
__ stop("init_AdapterMethodHandle should not issue this");
break;
case _adapter_opt_swap_1:
case _adapter_opt_swap_2:
case _adapter_opt_rot_1_up:
case _adapter_opt_rot_1_down:
case _adapter_opt_rot_2_up:
case _adapter_opt_rot_2_down:
{
int swap_bytes = 0, rotate = 0;
get_ek_adapter_opt_swap_rot_info(ek, swap_bytes, rotate);
// 'argslot' is the position of the first argument to swap
__ movl(rax_argslot, rcx_amh_vmargslot);
__ lea(rax_argslot, __ argument_address(rax_argslot));
// 'vminfo' is the second
Register rbx_destslot = rbx_temp;
__ movl(rbx_destslot, rcx_amh_conversion);
assert(CONV_VMINFO_SHIFT == 0, "preshifted");
__ andl(rbx_destslot, CONV_VMINFO_MASK);
__ lea(rbx_destslot, __ argument_address(rbx_destslot));
DEBUG_ONLY(verify_argslot(_masm, rbx_destslot, "swap point must fall within current frame"));
if (!rotate) {
for (int i = 0; i < swap_bytes; i += wordSize) {
__ movptr(rdx_temp, Address(rax_argslot , i));
__ push(rdx_temp);
__ movptr(rdx_temp, Address(rbx_destslot, i));
__ movptr(Address(rax_argslot, i), rdx_temp);
__ pop(rdx_temp);
__ movptr(Address(rbx_destslot, i), rdx_temp);
}
} else {
// push the first chunk, which is going to get overwritten
for (int i = swap_bytes; (i -= wordSize) >= 0; ) {
__ movptr(rdx_temp, Address(rax_argslot, i));
__ push(rdx_temp);
}
if (rotate > 0) {
// rotate upward
__ subptr(rax_argslot, swap_bytes);
#ifdef ASSERT
{
// Verify that argslot > destslot, by at least swap_bytes.
Label L_ok;
__ cmpptr(rax_argslot, rbx_destslot);
__ jccb(Assembler::aboveEqual, L_ok);
__ stop("source must be above destination (upward rotation)");
__ bind(L_ok);
}
#endif
// work argslot down to destslot, copying contiguous data upwards
// pseudo-code:
// rax = src_addr - swap_bytes
// rbx = dest_addr
// while (rax >= rbx) *(rax + swap_bytes) = *(rax + 0), rax--;
Label loop;
__ bind(loop);
__ movptr(rdx_temp, Address(rax_argslot, 0));
__ movptr(Address(rax_argslot, swap_bytes), rdx_temp);
__ addptr(rax_argslot, -wordSize);
__ cmpptr(rax_argslot, rbx_destslot);
__ jccb(Assembler::aboveEqual, loop);
} else {
__ addptr(rax_argslot, swap_bytes);
#ifdef ASSERT
{
// Verify that argslot < destslot, by at least swap_bytes.
Label L_ok;
__ cmpptr(rax_argslot, rbx_destslot);
__ jccb(Assembler::belowEqual, L_ok);
__ stop("source must be below destination (downward rotation)");
__ bind(L_ok);
}
#endif
// work argslot up to destslot, copying contiguous data downwards
// pseudo-code:
// rax = src_addr + swap_bytes
// rbx = dest_addr
// while (rax <= rbx) *(rax - swap_bytes) = *(rax + 0), rax++;
Label loop;
__ bind(loop);
__ movptr(rdx_temp, Address(rax_argslot, 0));
__ movptr(Address(rax_argslot, -swap_bytes), rdx_temp);
__ addptr(rax_argslot, wordSize);
__ cmpptr(rax_argslot, rbx_destslot);
__ jccb(Assembler::belowEqual, loop);
}
// pop the original first chunk into the destination slot, now free
for (int i = 0; i < swap_bytes; i += wordSize) {
__ pop(rdx_temp);
__ movptr(Address(rbx_destslot, i), rdx_temp);
}
}
__ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
__ jump_to_method_handle_entry(rcx_recv, rdx_temp);
}
break;
case _adapter_dup_args:
{
// 'argslot' is the position of the first argument to duplicate
__ movl(rax_argslot, rcx_amh_vmargslot);
__ lea(rax_argslot, __ argument_address(rax_argslot));
// 'stack_move' is negative number of words to duplicate
Register rdx_stack_move = rdx_temp;
__ movl2ptr(rdx_stack_move, rcx_amh_conversion);
__ sarptr(rdx_stack_move, CONV_STACK_MOVE_SHIFT);
int argslot0_num = 0;
Address argslot0 = __ argument_address(RegisterOrConstant(argslot0_num));
assert(argslot0.base() == rsp, "");
int pre_arg_size = argslot0.disp();
assert(pre_arg_size % wordSize == 0, "");
assert(pre_arg_size > 0, "must include PC");
// remember the old rsp+1 (argslot[0])
Register rbx_oldarg = rbx_temp;
__ lea(rbx_oldarg, argslot0);
// move rsp down to make room for dups
__ lea(rsp, Address(rsp, rdx_stack_move, Address::times_ptr));
// compute the new rsp+1 (argslot[0])
Register rdx_newarg = rdx_temp;
__ lea(rdx_newarg, argslot0);
__ push(rdi); // need a temp
// (preceding push must be done after arg addresses are taken!)
// pull down the pre_arg_size data (PC)
for (int i = -pre_arg_size; i < 0; i += wordSize) {
__ movptr(rdi, Address(rbx_oldarg, i));
__ movptr(Address(rdx_newarg, i), rdi);
}
// copy from rax_argslot[0...] down to new_rsp[1...]
// pseudo-code:
// rbx = old_rsp+1
// rdx = new_rsp+1
// rax = argslot
// while (rdx < rbx) *rdx++ = *rax++
Label loop;
__ bind(loop);
__ movptr(rdi, Address(rax_argslot, 0));
__ movptr(Address(rdx_newarg, 0), rdi);
__ addptr(rax_argslot, wordSize);
__ addptr(rdx_newarg, wordSize);
__ cmpptr(rdx_newarg, rbx_oldarg);
__ jccb(Assembler::less, loop);
__ pop(rdi); // restore temp
__ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
__ jump_to_method_handle_entry(rcx_recv, rdx_temp);
}
break;
case _adapter_drop_args:
{
// 'argslot' is the position of the first argument to nuke
__ movl(rax_argslot, rcx_amh_vmargslot);
__ lea(rax_argslot, __ argument_address(rax_argslot));
__ push(rdi); // need a temp
// (must do previous push after argslot address is taken)
// 'stack_move' is number of words to drop
Register rdi_stack_move = rdi;
__ movl2ptr(rdi_stack_move, rcx_amh_conversion);
__ sarptr(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
remove_arg_slots(_masm, rdi_stack_move,
rax_argslot, rbx_temp, rdx_temp);
__ pop(rdi); // restore temp
__ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
__ jump_to_method_handle_entry(rcx_recv, rdx_temp);
}
break;
case _adapter_collect_args:
__ unimplemented(entry_name(ek)); // %%% FIXME: NYI
break;
case _adapter_spread_args:
// handled completely by optimized cases
__ stop("init_AdapterMethodHandle should not issue this");
break;
case _adapter_opt_spread_0:
case _adapter_opt_spread_1:
case _adapter_opt_spread_more:
{
// spread an array out into a group of arguments
int length_constant = get_ek_adapter_opt_spread_info(ek);
// find the address of the array argument
__ movl(rax_argslot, rcx_amh_vmargslot);
__ lea(rax_argslot, __ argument_address(rax_argslot));
// grab some temps
{ __ push(rsi); __ push(rdi); }
// (preceding pushes must be done after argslot address is taken!)
#define UNPUSH_RSI_RDI \
{ __ pop(rdi); __ pop(rsi); }
// arx_argslot points both to the array and to the first output arg
vmarg = Address(rax_argslot, 0);
// Get the array value.
Register rsi_array = rsi;
Register rdx_array_klass = rdx_temp;
BasicType elem_type = T_OBJECT;
int length_offset = arrayOopDesc::length_offset_in_bytes();
int elem0_offset = arrayOopDesc::base_offset_in_bytes(elem_type);
__ movptr(rsi_array, vmarg);
Label skip_array_check;
if (length_constant == 0) {
__ testptr(rsi_array, rsi_array);
__ jcc(Assembler::zero, skip_array_check);
}
__ null_check(rsi_array, oopDesc::klass_offset_in_bytes());
__ load_klass(rdx_array_klass, rsi_array);
// Check the array type.
Register rbx_klass = rbx_temp;
__ load_heap_oop(rbx_klass, rcx_amh_argument); // this is a Class object!
__ load_heap_oop(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
Label ok_array_klass, bad_array_klass, bad_array_length;
__ check_klass_subtype(rdx_array_klass, rbx_klass, rdi, ok_array_klass);
// If we get here, the type check failed!
__ jmp(bad_array_klass);
__ bind(ok_array_klass);
// Check length.
if (length_constant >= 0) {
__ cmpl(Address(rsi_array, length_offset), length_constant);
} else {
Register rbx_vminfo = rbx_temp;
__ movl(rbx_vminfo, rcx_amh_conversion);
assert(CONV_VMINFO_SHIFT == 0, "preshifted");
__ andl(rbx_vminfo, CONV_VMINFO_MASK);
__ cmpl(rbx_vminfo, Address(rsi_array, length_offset));
}
__ jcc(Assembler::notEqual, bad_array_length);
Register rdx_argslot_limit = rdx_temp;
// Array length checks out. Now insert any required stack slots.
if (length_constant == -1) {
// Form a pointer to the end of the affected region.
__ lea(rdx_argslot_limit, Address(rax_argslot, Interpreter::stackElementSize));
// 'stack_move' is negative number of words to insert
Register rdi_stack_move = rdi;
__ movl2ptr(rdi_stack_move, rcx_amh_conversion);
__ sarptr(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
Register rsi_temp = rsi_array; // spill this
insert_arg_slots(_masm, rdi_stack_move, -1,
rax_argslot, rbx_temp, rsi_temp);
// reload the array (since rsi was killed)
__ movptr(rsi_array, vmarg);
} else if (length_constant > 1) {
int arg_mask = 0;
int new_slots = (length_constant - 1);
for (int i = 0; i < new_slots; i++) {
arg_mask <<= 1;
arg_mask |= _INSERT_REF_MASK;
}
insert_arg_slots(_masm, new_slots * stack_move_unit(), arg_mask,
rax_argslot, rbx_temp, rdx_temp);
} else if (length_constant == 1) {
// no stack resizing required
} else if (length_constant == 0) {
remove_arg_slots(_masm, -stack_move_unit(),
rax_argslot, rbx_temp, rdx_temp);
}
// Copy from the array to the new slots.
// Note: Stack change code preserves integrity of rax_argslot pointer.
// So even after slot insertions, rax_argslot still points to first argument.
if (length_constant == -1) {
// [rax_argslot, rdx_argslot_limit) is the area we are inserting into.
Register rsi_source = rsi_array;
__ lea(rsi_source, Address(rsi_array, elem0_offset));
Label loop;
__ bind(loop);
__ movptr(rbx_temp, Address(rsi_source, 0));
__ movptr(Address(rax_argslot, 0), rbx_temp);
__ addptr(rsi_source, type2aelembytes(elem_type));
__ addptr(rax_argslot, Interpreter::stackElementSize);
__ cmpptr(rax_argslot, rdx_argslot_limit);
__ jccb(Assembler::less, loop);
} else if (length_constant == 0) {
__ bind(skip_array_check);
// nothing to copy
} else {
int elem_offset = elem0_offset;
int slot_offset = 0;
for (int index = 0; index < length_constant; index++) {
__ movptr(rbx_temp, Address(rsi_array, elem_offset));
__ movptr(Address(rax_argslot, slot_offset), rbx_temp);
elem_offset += type2aelembytes(elem_type);
slot_offset += Interpreter::stackElementSize;
}
}
// Arguments are spread. Move to next method handle.
UNPUSH_RSI_RDI;
__ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
__ jump_to_method_handle_entry(rcx_recv, rdx_temp);
__ bind(bad_array_klass);
UNPUSH_RSI_RDI;
assert(!vmarg.uses(rarg2_required), "must be different registers");
__ movptr(rarg2_required, Address(rdx_array_klass, java_mirror_offset)); // required type
__ movptr(rarg1_actual, vmarg); // bad array
__ movl( rarg0_code, (int) Bytecodes::_aaload); // who is complaining?
__ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
__ bind(bad_array_length);
UNPUSH_RSI_RDI;
assert(!vmarg.uses(rarg2_required), "must be different registers");
__ mov (rarg2_required, rcx_recv); // AMH requiring a certain length
__ movptr(rarg1_actual, vmarg); // bad array
__ movl( rarg0_code, (int) Bytecodes::_arraylength); // who is complaining?
__ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
#undef UNPUSH_RSI_RDI
}
break;
case _adapter_flyby:
case _adapter_ricochet:
__ unimplemented(entry_name(ek)); // %%% FIXME: NYI
break;
default: ShouldNotReachHere();
}
__ hlt();
address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
__ unimplemented(entry_name(ek)); // %%% FIXME: NYI
init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
}
// Helper to remove argument slots from the stack.
// arg_slots must be a multiple of stack_move_unit() and >= 0
void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
RegisterOrConstant arg_slots,
Register rax_argslot,
Register rbx_temp, Register rdx_temp, Register temp3_reg) {
assert(temp3_reg == noreg, "temp3 not required");
assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
(!arg_slots.is_register() ? rsp : arg_slots.as_register()));
#ifdef ASSERT
// Verify that [argslot..argslot+size) lies within (rsp, rbp).
__ lea(rbx_temp, Address(rax_argslot, arg_slots, Address::times_ptr));
verify_argslot(_masm, rbx_temp, "deleted argument(s) must fall within current frame");
if (arg_slots.is_register()) {
Label L_ok, L_bad;
__ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
__ jccb(Assembler::less, L_bad);
__ testl(arg_slots.as_register(), -stack_move_unit() - 1);
__ jccb(Assembler::zero, L_ok);
__ bind(L_bad);
__ stop("assert arg_slots >= 0 and clear low bits");
__ bind(L_ok);
} else {
assert(arg_slots.as_constant() >= 0, "");
assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
}
#endif //ASSERT
#ifdef _LP64
if (false) { // not needed, since register is positive
// clean high bits of stack motion register (was loaded as an int)
if (arg_slots.is_register())
__ movslq(arg_slots.as_register(), arg_slots.as_register());
}
#endif
BLOCK_COMMENT("remove_arg_slots {");
// Pull up everything shallower than rax_argslot.
// Then remove the excess space on the stack.
// The stacked return address gets pulled up with everything else.
// That is, copy [rsp, argslot) upward by size words. In pseudo-code:
// for (rdx = argslot-1; rdx >= rsp; --rdx)
// rdx[size] = rdx[0]
// argslot += size;
// rsp += size;
__ lea(rdx_temp, Address(rax_argslot, -wordSize)); // source pointer for copy
{
Label loop;
__ BIND(loop);
// pull one word up each time through the loop
__ movptr(rbx_temp, Address(rdx_temp, 0));
__ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
__ addptr(rdx_temp, -wordSize);
__ cmpptr(rdx_temp, rsp);
__ jccb(Assembler::greaterEqual, loop);
}
// Now move the argslot up, to point to the just-copied block.
__ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
// And adjust the argslot address to point at the deletion point.
__ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
BLOCK_COMMENT("} remove_arg_slots");
}
VtableStub* VtableStubs::create_itable_stub(int itable_index) {
// Note well: pd_code_size_limit is the absolute minimum we can get away with. If you
// add code here, bump the code stub size returned by pd_code_size_limit!
const int i486_code_length = VtableStub::pd_code_size_limit(false);
VtableStub* s = new(i486_code_length) VtableStub(false, itable_index);
// Can be NULL if there is no free space in the code cache.
if (s == NULL) {
return NULL;
}
ResourceMark rm;
CodeBuffer cb(s->entry_point(), i486_code_length);
MacroAssembler* masm = new MacroAssembler(&cb);
// Entry arguments:
// rax,: Interface
// rcx: Receiver
#ifndef PRODUCT
if (CountCompiledCalls) {
__ incrementl(ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr()));
}
#endif /* PRODUCT */
// get receiver (need to skip return address on top of stack)
assert(VtableStub::receiver_location() == rcx->as_VMReg(), "receiver expected in rcx");
// get receiver klass (also an implicit null-check)
address npe_addr = __ pc();
__ movptr(rsi, Address(rcx, oopDesc::klass_offset_in_bytes()));
// Most registers are in use; we'll use rax, rbx, rsi, rdi
// (If we need to make rsi, rdi callee-save, do a push/pop here.)
const Register method = rbx;
Label throw_icce;
// Get Method* and entrypoint for compiler
__ lookup_interface_method(// inputs: rec. class, interface, itable index
rsi, rax, itable_index,
// outputs: method, scan temp. reg
method, rdi,
throw_icce);
// method (rbx): Method*
// rcx: receiver
#ifdef ASSERT
if (DebugVtables) {
Label L1;
__ cmpptr(method, (int32_t)NULL_WORD);
__ jcc(Assembler::equal, L1);
__ cmpptr(Address(method, Method::from_compiled_offset()), (int32_t)NULL_WORD);
__ jcc(Assembler::notZero, L1);
__ stop("Method* is null");
__ bind(L1);
}
#endif // ASSERT
address ame_addr = __ pc();
__ jmp(Address(method, Method::from_compiled_offset()));
__ bind(throw_icce);
__ jump(RuntimeAddress(StubRoutines::throw_IncompatibleClassChangeError_entry()));
masm->flush();
if (PrintMiscellaneous && (WizardMode || Verbose)) {
tty->print_cr("itable #%d at "PTR_FORMAT"[%d] left over: %d",
itable_index, s->entry_point(),
(int)(s->code_end() - s->entry_point()),
(int)(s->code_end() - __ pc()));
}
guarantee(__ pc() <= s->code_end(), "overflowed buffer");
// shut the door on sizing bugs
int slop = 3; // 32-bit offset is this much larger than an 8-bit one
assert(itable_index > 10 || __ pc() + slop <= s->code_end(), "room for 32-bit offset");
s->set_exception_points(npe_addr, ame_addr);
return s;
}
void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {
const Address src(from(), Interpreter::local_offset_in_bytes(offset()));
#ifdef _WIN64
switch (_num_args) {
case 0:
assert(offset() == 0, "argument register 1 can only be (non-null) receiver");
__ lea(c_rarg1, src);
_num_args++;
break;
case 1:
__ lea(rax, src);
__ xorl(c_rarg2, c_rarg2);
__ cmpptr(src, 0);
__ cmov(Assembler::notEqual, c_rarg2, rax);
_num_args++;
break;
case 2:
__ lea(rax, src);
__ xorl(c_rarg3, c_rarg3);
__ cmpptr(src, 0);
__ cmov(Assembler::notEqual, c_rarg3, rax);
_num_args++;
break;
default:
__ lea(rax, src);
__ xorl(temp(), temp());
__ cmpptr(src, 0);
__ cmov(Assembler::notEqual, temp(), rax);
__ movptr(Address(to(), _stack_offset), temp());
_stack_offset += wordSize;
break;
}
#else
switch (_num_int_args) {
case 0:
assert(offset() == 0, "argument register 1 can only be (non-null) receiver");
__ lea(c_rarg1, src);
_num_int_args++;
break;
case 1:
__ lea(rax, src);
__ xorl(c_rarg2, c_rarg2);
__ cmpptr(src, 0);
__ cmov(Assembler::notEqual, c_rarg2, rax);
_num_int_args++;
break;
case 2:
__ lea(rax, src);
__ xorl(c_rarg3, c_rarg3);
__ cmpptr(src, 0);
__ cmov(Assembler::notEqual, c_rarg3, rax);
_num_int_args++;
break;
case 3:
__ lea(rax, src);
__ xorl(c_rarg4, c_rarg4);
__ cmpptr(src, 0);
__ cmov(Assembler::notEqual, c_rarg4, rax);
_num_int_args++;
break;
case 4:
__ lea(rax, src);
__ xorl(c_rarg5, c_rarg5);
__ cmpptr(src, 0);
__ cmov(Assembler::notEqual, c_rarg5, rax);
_num_int_args++;
break;
default:
__ lea(rax, src);
__ xorl(temp(), temp());
__ cmpptr(src, 0);
__ cmov(Assembler::notEqual, temp(), rax);
__ movptr(Address(to(), _stack_offset), temp());
_stack_offset += wordSize;
break;
}
#endif
}
// These stubs are used by the compiler only.
// Argument registers, which must be preserved:
// rcx - receiver (always first argument)
// rdx - second argument (if any)
// Other registers that might be usable:
// rax - inline cache register (is interface for itable stub)
// rbx - method (used when calling out to interpreter)
// Available now, but may become callee-save at some point:
// rsi, rdi
// Note that rax and rdx are also used for return values.
//
VtableStub* VtableStubs::create_vtable_stub(int vtable_index) {
const int i486_code_length = VtableStub::pd_code_size_limit(true);
VtableStub* s = new(i486_code_length) VtableStub(true, vtable_index);
// Can be NULL if there is no free space in the code cache.
if (s == NULL) {
return NULL;
}
ResourceMark rm;
CodeBuffer cb(s->entry_point(), i486_code_length);
MacroAssembler* masm = new MacroAssembler(&cb);
#ifndef PRODUCT
if (CountCompiledCalls) {
__ incrementl(ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr()));
}
#endif /* PRODUCT */
// get receiver (need to skip return address on top of stack)
assert(VtableStub::receiver_location() == rcx->as_VMReg(), "receiver expected in rcx");
// get receiver klass
address npe_addr = __ pc();
__ movptr(rax, Address(rcx, oopDesc::klass_offset_in_bytes()));
#ifndef PRODUCT
if (DebugVtables) {
Label L;
// check offset vs vtable length
__ cmpl(Address(rax, InstanceKlass::vtable_length_offset()*wordSize), vtable_index*vtableEntry::size());
__ jcc(Assembler::greater, L);
__ movl(rbx, vtable_index);
__ call_VM(noreg, CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), rcx, rbx);
__ bind(L);
}
#endif // PRODUCT
const Register method = rbx;
// load Method* and target address
__ lookup_virtual_method(rax, vtable_index, method);
if (DebugVtables) {
Label L;
__ cmpptr(method, (int32_t)NULL_WORD);
__ jcc(Assembler::equal, L);
__ cmpptr(Address(method, Method::from_compiled_offset()), (int32_t)NULL_WORD);
__ jcc(Assembler::notZero, L);
__ stop("Vtable entry is NULL");
__ bind(L);
}
// rax,: receiver klass
// method (rbx): Method*
// rcx: receiver
address ame_addr = __ pc();
__ jmp( Address(method, Method::from_compiled_offset()));
masm->flush();
if (PrintMiscellaneous && (WizardMode || Verbose)) {
tty->print_cr("vtable #%d at "PTR_FORMAT"[%d] left over: %d",
vtable_index, s->entry_point(),
(int)(s->code_end() - s->entry_point()),
(int)(s->code_end() - __ pc()));
}
guarantee(__ pc() <= s->code_end(), "overflowed buffer");
// shut the door on sizing bugs
int slop = 3; // 32-bit offset is this much larger than an 8-bit one
assert(vtable_index > 10 || __ pc() + slop <= s->code_end(), "room for 32-bit offset");
s->set_exception_points(npe_addr, ame_addr);
return s;
}
address generate_getPsrInfo() {
// Flags to test CPU type.
const uint32_t HS_EFL_AC = 0x40000;
const uint32_t HS_EFL_ID = 0x200000;
// Values for when we don't have a CPUID instruction.
const int CPU_FAMILY_SHIFT = 8;
const uint32_t CPU_FAMILY_386 = (3 << CPU_FAMILY_SHIFT);
const uint32_t CPU_FAMILY_486 = (4 << CPU_FAMILY_SHIFT);
Label detect_486, cpu486, detect_586, std_cpuid1, std_cpuid4;
Label sef_cpuid, ext_cpuid, ext_cpuid1, ext_cpuid5, ext_cpuid7, done;
StubCodeMark mark(this, "VM_Version", "getPsrInfo_stub");
# define __ _masm->
address start = __ pc();
//
// void getPsrInfo(VM_Version::CpuidInfo* cpuid_info);
//
// LP64: rcx and rdx are first and second argument registers on windows
__ push(rbp);
#ifdef _LP64
__ mov(rbp, c_rarg0); // cpuid_info address
#else
__ movptr(rbp, Address(rsp, 8)); // cpuid_info address
#endif
__ push(rbx);
__ push(rsi);
__ pushf(); // preserve rbx, and flags
__ pop(rax);
__ push(rax);
__ mov(rcx, rax);
//
// if we are unable to change the AC flag, we have a 386
//
__ xorl(rax, HS_EFL_AC);
__ push(rax);
__ popf();
__ pushf();
__ pop(rax);
__ cmpptr(rax, rcx);
__ jccb(Assembler::notEqual, detect_486);
__ movl(rax, CPU_FAMILY_386);
__ movl(Address(rbp, in_bytes(VM_Version::std_cpuid1_offset())), rax);
__ jmp(done);
//
// If we are unable to change the ID flag, we have a 486 which does
// not support the "cpuid" instruction.
//
__ bind(detect_486);
__ mov(rax, rcx);
__ xorl(rax, HS_EFL_ID);
__ push(rax);
__ popf();
__ pushf();
__ pop(rax);
__ cmpptr(rcx, rax);
__ jccb(Assembler::notEqual, detect_586);
__ bind(cpu486);
__ movl(rax, CPU_FAMILY_486);
__ movl(Address(rbp, in_bytes(VM_Version::std_cpuid1_offset())), rax);
__ jmp(done);
//
// At this point, we have a chip which supports the "cpuid" instruction
//
__ bind(detect_586);
__ xorl(rax, rax);
__ cpuid();
__ orl(rax, rax);
__ jcc(Assembler::equal, cpu486); // if cpuid doesn't support an input
// value of at least 1, we give up and
// assume a 486
__ lea(rsi, Address(rbp, in_bytes(VM_Version::std_cpuid0_offset())));
__ movl(Address(rsi, 0), rax);
__ movl(Address(rsi, 4), rbx);
__ movl(Address(rsi, 8), rcx);
__ movl(Address(rsi,12), rdx);
__ cmpl(rax, 0xa); // Is cpuid(0xB) supported?
__ jccb(Assembler::belowEqual, std_cpuid4);
//
// cpuid(0xB) Processor Topology
//
__ movl(rax, 0xb);
__ xorl(rcx, rcx); // Threads level
__ cpuid();
__ lea(rsi, Address(rbp, in_bytes(VM_Version::tpl_cpuidB0_offset())));
__ movl(Address(rsi, 0), rax);
__ movl(Address(rsi, 4), rbx);
__ movl(Address(rsi, 8), rcx);
__ movl(Address(rsi,12), rdx);
__ movl(rax, 0xb);
__ movl(rcx, 1); // Cores level
__ cpuid();
__ push(rax);
__ andl(rax, 0x1f); // Determine if valid topology level
__ orl(rax, rbx); // eax[4:0] | ebx[0:15] == 0 indicates invalid level
__ andl(rax, 0xffff);
__ pop(rax);
__ jccb(Assembler::equal, std_cpuid4);
__ lea(rsi, Address(rbp, in_bytes(VM_Version::tpl_cpuidB1_offset())));
__ movl(Address(rsi, 0), rax);
__ movl(Address(rsi, 4), rbx);
__ movl(Address(rsi, 8), rcx);
__ movl(Address(rsi,12), rdx);
__ movl(rax, 0xb);
__ movl(rcx, 2); // Packages level
__ cpuid();
__ push(rax);
__ andl(rax, 0x1f); // Determine if valid topology level
__ orl(rax, rbx); // eax[4:0] | ebx[0:15] == 0 indicates invalid level
__ andl(rax, 0xffff);
__ pop(rax);
__ jccb(Assembler::equal, std_cpuid4);
__ lea(rsi, Address(rbp, in_bytes(VM_Version::tpl_cpuidB2_offset())));
__ movl(Address(rsi, 0), rax);
__ movl(Address(rsi, 4), rbx);
__ movl(Address(rsi, 8), rcx);
__ movl(Address(rsi,12), rdx);
//
// cpuid(0x4) Deterministic cache params
//
__ bind(std_cpuid4);
__ movl(rax, 4);
__ cmpl(rax, Address(rbp, in_bytes(VM_Version::std_cpuid0_offset()))); // Is cpuid(0x4) supported?
__ jccb(Assembler::greater, std_cpuid1);
__ xorl(rcx, rcx); // L1 cache
__ cpuid();
__ push(rax);
__ andl(rax, 0x1f); // Determine if valid cache parameters used
__ orl(rax, rax); // eax[4:0] == 0 indicates invalid cache
__ pop(rax);
__ jccb(Assembler::equal, std_cpuid1);
__ lea(rsi, Address(rbp, in_bytes(VM_Version::dcp_cpuid4_offset())));
__ movl(Address(rsi, 0), rax);
__ movl(Address(rsi, 4), rbx);
__ movl(Address(rsi, 8), rcx);
__ movl(Address(rsi,12), rdx);
//
// Standard cpuid(0x1)
//
__ bind(std_cpuid1);
__ movl(rax, 1);
__ cpuid();
__ lea(rsi, Address(rbp, in_bytes(VM_Version::std_cpuid1_offset())));
__ movl(Address(rsi, 0), rax);
__ movl(Address(rsi, 4), rbx);
__ movl(Address(rsi, 8), rcx);
__ movl(Address(rsi,12), rdx);
//
// Check if OS has enabled XGETBV instruction to access XCR0
// (OSXSAVE feature flag) and CPU supports AVX
//
__ andl(rcx, 0x18000000);
__ cmpl(rcx, 0x18000000);
__ jccb(Assembler::notEqual, sef_cpuid);
//
// XCR0, XFEATURE_ENABLED_MASK register
//
__ xorl(rcx, rcx); // zero for XCR0 register
__ xgetbv();
__ lea(rsi, Address(rbp, in_bytes(VM_Version::xem_xcr0_offset())));
__ movl(Address(rsi, 0), rax);
__ movl(Address(rsi, 4), rdx);
//
// cpuid(0x7) Structured Extended Features
//
__ bind(sef_cpuid);
__ movl(rax, 7);
__ cmpl(rax, Address(rbp, in_bytes(VM_Version::std_cpuid0_offset()))); // Is cpuid(0x7) supported?
__ jccb(Assembler::greater, ext_cpuid);
__ xorl(rcx, rcx);
__ cpuid();
__ lea(rsi, Address(rbp, in_bytes(VM_Version::sef_cpuid7_offset())));
__ movl(Address(rsi, 0), rax);
__ movl(Address(rsi, 4), rbx);
//
// Extended cpuid(0x80000000)
//
__ bind(ext_cpuid);
__ movl(rax, 0x80000000);
__ cpuid();
__ cmpl(rax, 0x80000000); // Is cpuid(0x80000001) supported?
__ jcc(Assembler::belowEqual, done);
__ cmpl(rax, 0x80000004); // Is cpuid(0x80000005) supported?
__ jccb(Assembler::belowEqual, ext_cpuid1);
__ cmpl(rax, 0x80000006); // Is cpuid(0x80000007) supported?
__ jccb(Assembler::belowEqual, ext_cpuid5);
__ cmpl(rax, 0x80000007); // Is cpuid(0x80000008) supported?
__ jccb(Assembler::belowEqual, ext_cpuid7);
//
// Extended cpuid(0x80000008)
//
__ movl(rax, 0x80000008);
__ cpuid();
__ lea(rsi, Address(rbp, in_bytes(VM_Version::ext_cpuid8_offset())));
__ movl(Address(rsi, 0), rax);
__ movl(Address(rsi, 4), rbx);
__ movl(Address(rsi, 8), rcx);
__ movl(Address(rsi,12), rdx);
//
// Extended cpuid(0x80000007)
//
__ bind(ext_cpuid7);
__ movl(rax, 0x80000007);
__ cpuid();
__ lea(rsi, Address(rbp, in_bytes(VM_Version::ext_cpuid7_offset())));
__ movl(Address(rsi, 0), rax);
__ movl(Address(rsi, 4), rbx);
__ movl(Address(rsi, 8), rcx);
__ movl(Address(rsi,12), rdx);
//
// Extended cpuid(0x80000005)
//
__ bind(ext_cpuid5);
__ movl(rax, 0x80000005);
__ cpuid();
__ lea(rsi, Address(rbp, in_bytes(VM_Version::ext_cpuid5_offset())));
__ movl(Address(rsi, 0), rax);
__ movl(Address(rsi, 4), rbx);
__ movl(Address(rsi, 8), rcx);
__ movl(Address(rsi,12), rdx);
//
// Extended cpuid(0x80000001)
//
__ bind(ext_cpuid1);
__ movl(rax, 0x80000001);
__ cpuid();
__ lea(rsi, Address(rbp, in_bytes(VM_Version::ext_cpuid1_offset())));
__ movl(Address(rsi, 0), rax);
__ movl(Address(rsi, 4), rbx);
__ movl(Address(rsi, 8), rcx);
__ movl(Address(rsi,12), rdx);
//
// return
//
__ bind(done);
__ popf();
__ pop(rsi);
__ pop(rbx);
__ pop(rbp);
__ ret(0);
# undef __
return start;
};