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src/cpu/x86/vm/jniFastGetField_x86_64.cpp@8b46b0196eb0 (annotated)

src/cpu/x86/vm/jniFastGetField_x86_64.cpp

Fri, 25 Jan 2013 10:04:08 -0500

author

zgu

date

Fri, 25 Jan 2013 10:04:08 -0500

changeset 4492

8b46b0196eb0

parent 4318

cd3d6a6b95d9

child 6876

710a3c8b516e

child 8316

626f594dffa6

permissions

-rw-r--r--

8000692: Remove old KERNEL code
Summary: Removed depreciated kernel VM source code from hotspot VM
Reviewed-by: dholmes, acorn

duke@435	1	/*
twisti@2103	2	* Copyright (c) 2004, 2010, Oracle and/or its affiliates. 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	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#include "precompiled.hpp"
twisti@4318	26	#include "asm/macroAssembler.hpp"
stefank@2314	27	#include "memory/resourceArea.hpp"
stefank@2314	28	#include "prims/jniFastGetField.hpp"
stefank@2314	29	#include "prims/jvm_misc.hpp"
stefank@2314	30	#include "runtime/safepoint.hpp"
duke@435	31
duke@435	32	#define __ masm->
duke@435	33
duke@435	34	#define BUFFER_SIZE 30*wordSize
duke@435	35
duke@435	36	// Instead of issuing lfence for LoadLoad barrier, we create data dependency
duke@435	37	// between loads, which is more efficient than lfence.
duke@435	38
duke@435	39	// Common register usage:
duke@435	40	// rax/xmm0: result
duke@435	41	// c_rarg0: jni env
duke@435	42	// c_rarg1: obj
duke@435	43	// c_rarg2: jfield id
duke@435	44
duke@435	45	static const Register robj = r9;
duke@435	46	static const Register rcounter = r10;
duke@435	47	static const Register roffset = r11;
duke@435	48	static const Register rcounter_addr = r11;
duke@435	49
duke@435	50	// Warning: do not use rip relative addressing after the first counter load
duke@435	51	// since that may scratch r10!
duke@435	52
duke@435	53	address JNI_FastGetField::generate_fast_get_int_field0(BasicType type) {
duke@435	54	const char *name;
duke@435	55	switch (type) {
duke@435	56	case T_BOOLEAN: name = "jni_fast_GetBooleanField"; break;
duke@435	57	case T_BYTE: name = "jni_fast_GetByteField"; break;
duke@435	58	case T_CHAR: name = "jni_fast_GetCharField"; break;
duke@435	59	case T_SHORT: name = "jni_fast_GetShortField"; break;
duke@435	60	case T_INT: name = "jni_fast_GetIntField"; break;
duke@435	61	case T_LONG: name = "jni_fast_GetLongField"; break;
duke@435	62	default: ShouldNotReachHere();
duke@435	63	}
duke@435	64	ResourceMark rm;
twisti@2103	65	BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE);
twisti@2103	66	CodeBuffer cbuf(blob);
duke@435	67	MacroAssembler* masm = new MacroAssembler(&cbuf);
twisti@2103	68	address fast_entry = __ pc();
duke@435	69
duke@435	70	Label slow;
duke@435	71
duke@435	72	ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
duke@435	73	__ mov32 (rcounter, counter);
never@739	74	__ mov (robj, c_rarg1);
duke@435	75	__ testb (rcounter, 1);
duke@435	76	__ jcc (Assembler::notZero, slow);
duke@435	77	if (os::is_MP()) {
never@739	78	__ xorptr(robj, rcounter);
never@739	79	__ xorptr(robj, rcounter); // obj, since
duke@435	80	// robj ^ rcounter ^ rcounter == robj
duke@435	81	// robj is data dependent on rcounter.
duke@435	82	}
never@739	83	__ movptr(robj, Address(robj, 0)); // *obj
never@739	84	__ mov (roffset, c_rarg2);
never@739	85	__ shrptr(roffset, 2); // offset
duke@435	86
duke@435	87	assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
duke@435	88	speculative_load_pclist[count] = __ pc();
duke@435	89	switch (type) {
duke@435	90	case T_BOOLEAN: __ movzbl (rax, Address(robj, roffset, Address::times_1)); break;
duke@435	91	case T_BYTE: __ movsbl (rax, Address(robj, roffset, Address::times_1)); break;
duke@435	92	case T_CHAR: __ movzwl (rax, Address(robj, roffset, Address::times_1)); break;
duke@435	93	case T_SHORT: __ movswl (rax, Address(robj, roffset, Address::times_1)); break;
duke@435	94	case T_INT: __ movl (rax, Address(robj, roffset, Address::times_1)); break;
duke@435	95	case T_LONG: __ movq (rax, Address(robj, roffset, Address::times_1)); break;
duke@435	96	default: ShouldNotReachHere();
duke@435	97	}
duke@435	98
duke@435	99	if (os::is_MP()) {
duke@435	100	__ lea(rcounter_addr, counter);
duke@435	101	// ca is data dependent on rax.
never@739	102	__ xorptr(rcounter_addr, rax);
never@739	103	__ xorptr(rcounter_addr, rax);
duke@435	104	__ cmpl (rcounter, Address(rcounter_addr, 0));
duke@435	105	} else {
duke@435	106	__ cmp32 (rcounter, counter);
duke@435	107	}
duke@435	108	__ jcc (Assembler::notEqual, slow);
duke@435	109
duke@435	110	__ ret (0);
duke@435	111
duke@435	112	slowcase_entry_pclist[count++] = __ pc();
duke@435	113	__ bind (slow);
duke@435	114	address slow_case_addr;
duke@435	115	switch (type) {
duke@435	116	case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break;
duke@435	117	case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break;
duke@435	118	case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break;
duke@435	119	case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break;
duke@435	120	case T_INT: slow_case_addr = jni_GetIntField_addr(); break;
duke@435	121	case T_LONG: slow_case_addr = jni_GetLongField_addr();
duke@435	122	}
duke@435	123	// tail call
duke@435	124	__ jump (ExternalAddress(slow_case_addr));
duke@435	125
duke@435	126	__ flush ();
duke@435	127
duke@435	128	return fast_entry;
duke@435	129	}
duke@435	130
duke@435	131	address JNI_FastGetField::generate_fast_get_boolean_field() {
duke@435	132	return generate_fast_get_int_field0(T_BOOLEAN);
duke@435	133	}
duke@435	134
duke@435	135	address JNI_FastGetField::generate_fast_get_byte_field() {
duke@435	136	return generate_fast_get_int_field0(T_BYTE);
duke@435	137	}
duke@435	138
duke@435	139	address JNI_FastGetField::generate_fast_get_char_field() {
duke@435	140	return generate_fast_get_int_field0(T_CHAR);
duke@435	141	}
duke@435	142
duke@435	143	address JNI_FastGetField::generate_fast_get_short_field() {
duke@435	144	return generate_fast_get_int_field0(T_SHORT);
duke@435	145	}
duke@435	146
duke@435	147	address JNI_FastGetField::generate_fast_get_int_field() {
duke@435	148	return generate_fast_get_int_field0(T_INT);
duke@435	149	}
duke@435	150
duke@435	151	address JNI_FastGetField::generate_fast_get_long_field() {
duke@435	152	return generate_fast_get_int_field0(T_LONG);
duke@435	153	}
duke@435	154
duke@435	155	address JNI_FastGetField::generate_fast_get_float_field0(BasicType type) {
duke@435	156	const char *name;
duke@435	157	switch (type) {
duke@435	158	case T_FLOAT: name = "jni_fast_GetFloatField"; break;
duke@435	159	case T_DOUBLE: name = "jni_fast_GetDoubleField"; break;
duke@435	160	default: ShouldNotReachHere();
duke@435	161	}
duke@435	162	ResourceMark rm;
twisti@2103	163	BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE);
twisti@2103	164	CodeBuffer cbuf(blob);
duke@435	165	MacroAssembler* masm = new MacroAssembler(&cbuf);
twisti@2103	166	address fast_entry = __ pc();
duke@435	167
duke@435	168	Label slow;
duke@435	169
duke@435	170	ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
duke@435	171	__ mov32 (rcounter, counter);
never@739	172	__ mov (robj, c_rarg1);
duke@435	173	__ testb (rcounter, 1);
duke@435	174	__ jcc (Assembler::notZero, slow);
duke@435	175	if (os::is_MP()) {
never@739	176	__ xorptr(robj, rcounter);
never@739	177	__ xorptr(robj, rcounter); // obj, since
duke@435	178	// robj ^ rcounter ^ rcounter == robj
duke@435	179	// robj is data dependent on rcounter.
duke@435	180	}
never@739	181	__ movptr(robj, Address(robj, 0)); // *obj
never@739	182	__ mov (roffset, c_rarg2);
never@739	183	__ shrptr(roffset, 2); // offset
duke@435	184
duke@435	185	assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
duke@435	186	speculative_load_pclist[count] = __ pc();
duke@435	187	switch (type) {
duke@435	188	case T_FLOAT: __ movflt (xmm0, Address(robj, roffset, Address::times_1)); break;
duke@435	189	case T_DOUBLE: __ movdbl (xmm0, Address(robj, roffset, Address::times_1)); break;
duke@435	190	default: ShouldNotReachHere();
duke@435	191	}
duke@435	192
duke@435	193	if (os::is_MP()) {
duke@435	194	__ lea(rcounter_addr, counter);
duke@435	195	__ movdq (rax, xmm0);
duke@435	196	// counter address is data dependent on xmm0.
never@739	197	__ xorptr(rcounter_addr, rax);
never@739	198	__ xorptr(rcounter_addr, rax);
duke@435	199	__ cmpl (rcounter, Address(rcounter_addr, 0));
duke@435	200	} else {
duke@435	201	__ cmp32 (rcounter, counter);
duke@435	202	}
duke@435	203	__ jcc (Assembler::notEqual, slow);
duke@435	204
duke@435	205	__ ret (0);
duke@435	206
duke@435	207	slowcase_entry_pclist[count++] = __ pc();
duke@435	208	__ bind (slow);
duke@435	209	address slow_case_addr;
duke@435	210	switch (type) {
duke@435	211	case T_FLOAT: slow_case_addr = jni_GetFloatField_addr(); break;
duke@435	212	case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr();
duke@435	213	}
duke@435	214	// tail call
duke@435	215	__ jump (ExternalAddress(slow_case_addr));
duke@435	216
duke@435	217	__ flush ();
duke@435	218
duke@435	219	return fast_entry;
duke@435	220	}
duke@435	221
duke@435	222	address JNI_FastGetField::generate_fast_get_float_field() {
duke@435	223	return generate_fast_get_float_field0(T_FLOAT);
duke@435	224	}
duke@435	225
duke@435	226	address JNI_FastGetField::generate_fast_get_double_field() {
duke@435	227	return generate_fast_get_float_field0(T_DOUBLE);
duke@435	228	}