0N/A/*
1668N/A * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
1472N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1472N/A * or visit www.oracle.com if you need additional information or have any
1472N/A * questions.
0N/A *
0N/A */
0N/A
1879N/A#include "precompiled.hpp"
1879N/A#include "assembler_x86.inline.hpp"
1879N/A#include "memory/resourceArea.hpp"
1879N/A#include "prims/jniFastGetField.hpp"
1879N/A#include "prims/jvm_misc.hpp"
1879N/A#include "runtime/safepoint.hpp"
0N/A
0N/A#define __ masm->
0N/A
0N/A#define BUFFER_SIZE 30*wordSize
0N/A
0N/A// Instead of issuing lfence for LoadLoad barrier, we create data dependency
0N/A// between loads, which is more efficient than lfence.
0N/A
0N/A// Common register usage:
0N/A// rax/xmm0: result
0N/A// c_rarg0: jni env
0N/A// c_rarg1: obj
0N/A// c_rarg2: jfield id
0N/A
0N/Astatic const Register robj = r9;
0N/Astatic const Register rcounter = r10;
0N/Astatic const Register roffset = r11;
0N/Astatic const Register rcounter_addr = r11;
0N/A
0N/A// Warning: do not use rip relative addressing after the first counter load
0N/A// since that may scratch r10!
0N/A
0N/Aaddress JNI_FastGetField::generate_fast_get_int_field0(BasicType type) {
0N/A const char *name;
0N/A switch (type) {
0N/A case T_BOOLEAN: name = "jni_fast_GetBooleanField"; break;
0N/A case T_BYTE: name = "jni_fast_GetByteField"; break;
0N/A case T_CHAR: name = "jni_fast_GetCharField"; break;
0N/A case T_SHORT: name = "jni_fast_GetShortField"; break;
0N/A case T_INT: name = "jni_fast_GetIntField"; break;
0N/A case T_LONG: name = "jni_fast_GetLongField"; break;
0N/A default: ShouldNotReachHere();
0N/A }
0N/A ResourceMark rm;
1668N/A BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE);
1668N/A CodeBuffer cbuf(blob);
0N/A MacroAssembler* masm = new MacroAssembler(&cbuf);
1668N/A address fast_entry = __ pc();
0N/A
0N/A Label slow;
0N/A
0N/A ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
0N/A __ mov32 (rcounter, counter);
304N/A __ mov (robj, c_rarg1);
0N/A __ testb (rcounter, 1);
0N/A __ jcc (Assembler::notZero, slow);
0N/A if (os::is_MP()) {
304N/A __ xorptr(robj, rcounter);
304N/A __ xorptr(robj, rcounter); // obj, since
0N/A // robj ^ rcounter ^ rcounter == robj
0N/A // robj is data dependent on rcounter.
0N/A }
304N/A __ movptr(robj, Address(robj, 0)); // *obj
304N/A __ mov (roffset, c_rarg2);
304N/A __ shrptr(roffset, 2); // offset
0N/A
0N/A assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
0N/A speculative_load_pclist[count] = __ pc();
0N/A switch (type) {
0N/A case T_BOOLEAN: __ movzbl (rax, Address(robj, roffset, Address::times_1)); break;
0N/A case T_BYTE: __ movsbl (rax, Address(robj, roffset, Address::times_1)); break;
0N/A case T_CHAR: __ movzwl (rax, Address(robj, roffset, Address::times_1)); break;
0N/A case T_SHORT: __ movswl (rax, Address(robj, roffset, Address::times_1)); break;
0N/A case T_INT: __ movl (rax, Address(robj, roffset, Address::times_1)); break;
0N/A case T_LONG: __ movq (rax, Address(robj, roffset, Address::times_1)); break;
0N/A default: ShouldNotReachHere();
0N/A }
0N/A
0N/A if (os::is_MP()) {
0N/A __ lea(rcounter_addr, counter);
0N/A // ca is data dependent on rax.
304N/A __ xorptr(rcounter_addr, rax);
304N/A __ xorptr(rcounter_addr, rax);
0N/A __ cmpl (rcounter, Address(rcounter_addr, 0));
0N/A } else {
0N/A __ cmp32 (rcounter, counter);
0N/A }
0N/A __ jcc (Assembler::notEqual, slow);
0N/A
0N/A __ ret (0);
0N/A
0N/A slowcase_entry_pclist[count++] = __ pc();
0N/A __ bind (slow);
0N/A address slow_case_addr;
0N/A switch (type) {
0N/A case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break;
0N/A case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break;
0N/A case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break;
0N/A case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break;
0N/A case T_INT: slow_case_addr = jni_GetIntField_addr(); break;
0N/A case T_LONG: slow_case_addr = jni_GetLongField_addr();
0N/A }
0N/A // tail call
0N/A __ jump (ExternalAddress(slow_case_addr));
0N/A
0N/A __ flush ();
0N/A
0N/A return fast_entry;
0N/A}
0N/A
0N/Aaddress JNI_FastGetField::generate_fast_get_boolean_field() {
0N/A return generate_fast_get_int_field0(T_BOOLEAN);
0N/A}
0N/A
0N/Aaddress JNI_FastGetField::generate_fast_get_byte_field() {
0N/A return generate_fast_get_int_field0(T_BYTE);
0N/A}
0N/A
0N/Aaddress JNI_FastGetField::generate_fast_get_char_field() {
0N/A return generate_fast_get_int_field0(T_CHAR);
0N/A}
0N/A
0N/Aaddress JNI_FastGetField::generate_fast_get_short_field() {
0N/A return generate_fast_get_int_field0(T_SHORT);
0N/A}
0N/A
0N/Aaddress JNI_FastGetField::generate_fast_get_int_field() {
0N/A return generate_fast_get_int_field0(T_INT);
0N/A}
0N/A
0N/Aaddress JNI_FastGetField::generate_fast_get_long_field() {
0N/A return generate_fast_get_int_field0(T_LONG);
0N/A}
0N/A
0N/Aaddress JNI_FastGetField::generate_fast_get_float_field0(BasicType type) {
0N/A const char *name;
0N/A switch (type) {
0N/A case T_FLOAT: name = "jni_fast_GetFloatField"; break;
0N/A case T_DOUBLE: name = "jni_fast_GetDoubleField"; break;
0N/A default: ShouldNotReachHere();
0N/A }
0N/A ResourceMark rm;
1668N/A BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE);
1668N/A CodeBuffer cbuf(blob);
0N/A MacroAssembler* masm = new MacroAssembler(&cbuf);
1668N/A address fast_entry = __ pc();
0N/A
0N/A Label slow;
0N/A
0N/A ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
0N/A __ mov32 (rcounter, counter);
304N/A __ mov (robj, c_rarg1);
0N/A __ testb (rcounter, 1);
0N/A __ jcc (Assembler::notZero, slow);
0N/A if (os::is_MP()) {
304N/A __ xorptr(robj, rcounter);
304N/A __ xorptr(robj, rcounter); // obj, since
0N/A // robj ^ rcounter ^ rcounter == robj
0N/A // robj is data dependent on rcounter.
0N/A }
304N/A __ movptr(robj, Address(robj, 0)); // *obj
304N/A __ mov (roffset, c_rarg2);
304N/A __ shrptr(roffset, 2); // offset
0N/A
0N/A assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
0N/A speculative_load_pclist[count] = __ pc();
0N/A switch (type) {
0N/A case T_FLOAT: __ movflt (xmm0, Address(robj, roffset, Address::times_1)); break;
0N/A case T_DOUBLE: __ movdbl (xmm0, Address(robj, roffset, Address::times_1)); break;
0N/A default: ShouldNotReachHere();
0N/A }
0N/A
0N/A if (os::is_MP()) {
0N/A __ lea(rcounter_addr, counter);
0N/A __ movdq (rax, xmm0);
0N/A // counter address is data dependent on xmm0.
304N/A __ xorptr(rcounter_addr, rax);
304N/A __ xorptr(rcounter_addr, rax);
0N/A __ cmpl (rcounter, Address(rcounter_addr, 0));
0N/A } else {
0N/A __ cmp32 (rcounter, counter);
0N/A }
0N/A __ jcc (Assembler::notEqual, slow);
0N/A
0N/A __ ret (0);
0N/A
0N/A slowcase_entry_pclist[count++] = __ pc();
0N/A __ bind (slow);
0N/A address slow_case_addr;
0N/A switch (type) {
0N/A case T_FLOAT: slow_case_addr = jni_GetFloatField_addr(); break;
0N/A case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr();
0N/A }
0N/A // tail call
0N/A __ jump (ExternalAddress(slow_case_addr));
0N/A
0N/A __ flush ();
0N/A
0N/A return fast_entry;
0N/A}
0N/A
0N/Aaddress JNI_FastGetField::generate_fast_get_float_field() {
0N/A return generate_fast_get_float_field0(T_FLOAT);
0N/A}
0N/A
0N/Aaddress JNI_FastGetField::generate_fast_get_double_field() {
0N/A return generate_fast_get_float_field0(T_DOUBLE);
0N/A}