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src/cpu/x86/vm/vtableStubs_x86_32.cpp@fbde8ec322d0 (annotated)

src/cpu/x86/vm/vtableStubs_x86_32.cpp

Tue, 31 Mar 2009 14:07:08 -0700

author

cfang

date

Tue, 31 Mar 2009 14:07:08 -0700

changeset 1116

fbde8ec322d0

parent 1058

9adddb8c0fc8

child 1144

1d037ecd7960

permissions

-rw-r--r--

6761600: Use sse 4.2 in intrinsics
Summary: Use SSE 4.2 in intrinsics for String.{compareTo/equals/indexOf} and Arrays.equals.
Reviewed-by: kvn, never, jrose

duke@435	1	/*
xdono@772	2	* Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	#include "incls/_precompiled.incl"
duke@435	26	#include "incls/_vtableStubs_x86_32.cpp.incl"
duke@435	27
duke@435	28	// machine-dependent part of VtableStubs: create VtableStub of correct size and
duke@435	29	// initialize its code
duke@435	30
duke@435	31	#define __ masm->
duke@435	32
duke@435	33	#ifndef PRODUCT
duke@435	34	extern "C" void bad_compiled_vtable_index(JavaThread* thread, oop receiver, int index);
duke@435	35	#endif
duke@435	36
jrose@1058	37	// These stubs are used by the compiler only.
jrose@1058	38	// Argument registers, which must be preserved:
jrose@1058	39	// rcx - receiver (always first argument)
jrose@1058	40	// rdx - second argument (if any)
jrose@1058	41	// Other registers that might be usable:
jrose@1058	42	// rax - inline cache register (is interface for itable stub)
jrose@1058	43	// rbx - method (used when calling out to interpreter)
jrose@1058	44	// Available now, but may become callee-save at some point:
jrose@1058	45	// rsi, rdi
jrose@1058	46	// Note that rax and rdx are also used for return values.
duke@435	47	//
duke@435	48	VtableStub* VtableStubs::create_vtable_stub(int vtable_index) {
duke@435	49	const int i486_code_length = VtableStub::pd_code_size_limit(true);
duke@435	50	VtableStub* s = new(i486_code_length) VtableStub(true, vtable_index);
duke@435	51	ResourceMark rm;
duke@435	52	CodeBuffer cb(s->entry_point(), i486_code_length);
duke@435	53	MacroAssembler* masm = new MacroAssembler(&cb);
duke@435	54
duke@435	55	#ifndef PRODUCT
duke@435	56
duke@435	57	if (CountCompiledCalls) {
never@739	58	__ incrementl(ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr()));
duke@435	59	}
duke@435	60	#endif /* PRODUCT */
duke@435	61
duke@435	62	// get receiver (need to skip return address on top of stack)
duke@435	63	assert(VtableStub::receiver_location() == rcx->as_VMReg(), "receiver expected in rcx");
duke@435	64
duke@435	65	// get receiver klass
duke@435	66	address npe_addr = __ pc();
never@739	67	__ movptr(rax, Address(rcx, oopDesc::klass_offset_in_bytes()));
duke@435	68	// compute entry offset (in words)
duke@435	69	int entry_offset = instanceKlass::vtable_start_offset() + vtable_index*vtableEntry::size();
duke@435	70	#ifndef PRODUCT
duke@435	71	if (DebugVtables) {
duke@435	72	Label L;
duke@435	73	// check offset vs vtable length
duke@435	74	__ cmpl(Address(rax, instanceKlass::vtable_length_offset()*wordSize), vtable_index*vtableEntry::size());
duke@435	75	__ jcc(Assembler::greater, L);
duke@435	76	__ movl(rbx, vtable_index);
duke@435	77	__ call_VM(noreg, CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), rcx, rbx);
duke@435	78	__ bind(L);
duke@435	79	}
duke@435	80	#endif // PRODUCT
duke@435	81
duke@435	82	const Register method = rbx;
duke@435	83
duke@435	84	// load methodOop and target address
never@739	85	__ movptr(method, Address(rax, entry_offset*wordSize + vtableEntry::method_offset_in_bytes()));
duke@435	86	if (DebugVtables) {
duke@435	87	Label L;
never@739	88	__ cmpptr(method, (int32_t)NULL_WORD);
duke@435	89	__ jcc(Assembler::equal, L);
never@739	90	__ cmpptr(Address(method, methodOopDesc::from_compiled_offset()), (int32_t)NULL_WORD);
duke@435	91	__ jcc(Assembler::notZero, L);
duke@435	92	__ stop("Vtable entry is NULL");
duke@435	93	__ bind(L);
duke@435	94	}
duke@435	95
duke@435	96	// rax,: receiver klass
duke@435	97	// method (rbx): methodOop
duke@435	98	// rcx: receiver
duke@435	99	address ame_addr = __ pc();
duke@435	100	__ jmp( Address(method, methodOopDesc::from_compiled_offset()));
duke@435	101
duke@435	102	masm->flush();
jrose@1058	103
jrose@1058	104	if (PrintMiscellaneous && (WizardMode || Verbose)) {
jrose@1058	105	tty->print_cr("vtable #%d at "PTR_FORMAT"[%d] left over: %d",
jrose@1058	106	vtable_index, s->entry_point(),
jrose@1058	107	(int)(s->code_end() - s->entry_point()),
jrose@1058	108	(int)(s->code_end() - __ pc()));
jrose@1058	109	}
jrose@1058	110	guarantee(__ pc() <= s->code_end(), "overflowed buffer");
jrose@1058	111
duke@435	112	s->set_exception_points(npe_addr, ame_addr);
duke@435	113	return s;
duke@435	114	}
duke@435	115
duke@435	116
jrose@1058	117	VtableStub* VtableStubs::create_itable_stub(int itable_index) {
duke@435	118	// Note well: pd_code_size_limit is the absolute minimum we can get away with. If you
duke@435	119	// add code here, bump the code stub size returned by pd_code_size_limit!
duke@435	120	const int i486_code_length = VtableStub::pd_code_size_limit(false);
jrose@1058	121	VtableStub* s = new(i486_code_length) VtableStub(false, itable_index);
duke@435	122	ResourceMark rm;
duke@435	123	CodeBuffer cb(s->entry_point(), i486_code_length);
duke@435	124	MacroAssembler* masm = new MacroAssembler(&cb);
duke@435	125
duke@435	126	// Entry arguments:
duke@435	127	// rax,: Interface
duke@435	128	// rcx: Receiver
duke@435	129
duke@435	130	#ifndef PRODUCT
duke@435	131	if (CountCompiledCalls) {
never@739	132	__ incrementl(ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr()));
duke@435	133	}
duke@435	134	#endif /* PRODUCT */
duke@435	135	// get receiver (need to skip return address on top of stack)
duke@435	136
duke@435	137	assert(VtableStub::receiver_location() == rcx->as_VMReg(), "receiver expected in rcx");
duke@435	138
duke@435	139	// get receiver klass (also an implicit null-check)
duke@435	140	address npe_addr = __ pc();
jrose@1058	141	__ movptr(rsi, Address(rcx, oopDesc::klass_offset_in_bytes()));
duke@435	142
jrose@1058	143	// Most registers are in use; we'll use rax, rbx, rsi, rdi
jrose@1058	144	// (If we need to make rsi, rdi callee-save, do a push/pop here.)
jrose@1058	145	const Register method = rbx;
jrose@1058	146	Label throw_icce;
duke@435	147
duke@435	148	// Get methodOop and entrypoint for compiler
jrose@1058	149	__ lookup_interface_method(// inputs: rec. class, interface, itable index
jrose@1058	150	rsi, rax, itable_index,
jrose@1058	151	// outputs: method, scan temp. reg
jrose@1058	152	method, rdi,
jrose@1058	153	throw_icce);
duke@435	154
duke@435	155	// method (rbx): methodOop
duke@435	156	// rcx: receiver
duke@435	157
duke@435	158	#ifdef ASSERT
duke@435	159	if (DebugVtables) {
duke@435	160	Label L1;
never@739	161	__ cmpptr(method, (int32_t)NULL_WORD);
duke@435	162	__ jcc(Assembler::equal, L1);
never@739	163	__ cmpptr(Address(method, methodOopDesc::from_compiled_offset()), (int32_t)NULL_WORD);
duke@435	164	__ jcc(Assembler::notZero, L1);
duke@435	165	__ stop("methodOop is null");
duke@435	166	__ bind(L1);
duke@435	167	}
duke@435	168	#endif // ASSERT
duke@435	169
duke@435	170	address ame_addr = __ pc();
duke@435	171	__ jmp(Address(method, methodOopDesc::from_compiled_offset()));
duke@435	172
dcubed@451	173	__ bind(throw_icce);
dcubed@451	174	__ jump(RuntimeAddress(StubRoutines::throw_IncompatibleClassChangeError_entry()));
duke@435	175	masm->flush();
dcubed@451	176
jrose@1058	177	if (PrintMiscellaneous && (WizardMode || Verbose)) {
jrose@1058	178	tty->print_cr("itable #%d at "PTR_FORMAT"[%d] left over: %d",
jrose@1058	179	itable_index, s->entry_point(),
jrose@1058	180	(int)(s->code_end() - s->entry_point()),
jrose@1058	181	(int)(s->code_end() - __ pc()));
jrose@1058	182	}
dcubed@451	183	guarantee(__ pc() <= s->code_end(), "overflowed buffer");
dcubed@451	184
duke@435	185	s->set_exception_points(npe_addr, ame_addr);
duke@435	186	return s;
duke@435	187	}
duke@435	188
duke@435	189
duke@435	190
duke@435	191	int VtableStub::pd_code_size_limit(bool is_vtable_stub) {
duke@435	192	if (is_vtable_stub) {
duke@435	193	// Vtable stub size
duke@435	194	return (DebugVtables ? 210 : 16) + (CountCompiledCalls ? 6 : 0);
duke@435	195	} else {
duke@435	196	// Itable stub size
jrose@1058	197	return (DebugVtables ? 256 : 66) + (CountCompiledCalls ? 6 : 0);
duke@435	198	}
duke@435	199	}
duke@435	200
duke@435	201	int VtableStub::pd_code_alignment() {
duke@435	202	return wordSize;
duke@435	203	}