1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/cpu/x86/vm/jniFastGetField_x86_64.cpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,228 @@
1.4 +/*
1.5 + * Copyright (c) 2004, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "precompiled.hpp"
1.29 +#include "asm/macroAssembler.hpp"
1.30 +#include "memory/resourceArea.hpp"
1.31 +#include "prims/jniFastGetField.hpp"
1.32 +#include "prims/jvm_misc.hpp"
1.33 +#include "runtime/safepoint.hpp"
1.34 +
1.35 +#define __ masm->
1.36 +
1.37 +#define BUFFER_SIZE 30*wordSize
1.38 +
1.39 +// Instead of issuing lfence for LoadLoad barrier, we create data dependency
1.40 +// between loads, which is more efficient than lfence.
1.41 +
1.42 +// Common register usage:
1.43 +// rax/xmm0: result
1.44 +// c_rarg0: jni env
1.45 +// c_rarg1: obj
1.46 +// c_rarg2: jfield id
1.47 +
1.48 +static const Register robj = r9;
1.49 +static const Register rcounter = r10;
1.50 +static const Register roffset = r11;
1.51 +static const Register rcounter_addr = r11;
1.52 +
1.53 +// Warning: do not use rip relative addressing after the first counter load
1.54 +// since that may scratch r10!
1.55 +
1.56 +address JNI_FastGetField::generate_fast_get_int_field0(BasicType type) {
1.57 + const char *name;
1.58 + switch (type) {
1.59 + case T_BOOLEAN: name = "jni_fast_GetBooleanField"; break;
1.60 + case T_BYTE: name = "jni_fast_GetByteField"; break;
1.61 + case T_CHAR: name = "jni_fast_GetCharField"; break;
1.62 + case T_SHORT: name = "jni_fast_GetShortField"; break;
1.63 + case T_INT: name = "jni_fast_GetIntField"; break;
1.64 + case T_LONG: name = "jni_fast_GetLongField"; break;
1.65 + default: ShouldNotReachHere();
1.66 + }
1.67 + ResourceMark rm;
1.68 + BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE);
1.69 + CodeBuffer cbuf(blob);
1.70 + MacroAssembler* masm = new MacroAssembler(&cbuf);
1.71 + address fast_entry = __ pc();
1.72 +
1.73 + Label slow;
1.74 +
1.75 + ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
1.76 + __ mov32 (rcounter, counter);
1.77 + __ mov (robj, c_rarg1);
1.78 + __ testb (rcounter, 1);
1.79 + __ jcc (Assembler::notZero, slow);
1.80 + if (os::is_MP()) {
1.81 + __ xorptr(robj, rcounter);
1.82 + __ xorptr(robj, rcounter); // obj, since
1.83 + // robj ^ rcounter ^ rcounter == robj
1.84 + // robj is data dependent on rcounter.
1.85 + }
1.86 + __ movptr(robj, Address(robj, 0)); // *obj
1.87 + __ mov (roffset, c_rarg2);
1.88 + __ shrptr(roffset, 2); // offset
1.89 +
1.90 + assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
1.91 + speculative_load_pclist[count] = __ pc();
1.92 + switch (type) {
1.93 + case T_BOOLEAN: __ movzbl (rax, Address(robj, roffset, Address::times_1)); break;
1.94 + case T_BYTE: __ movsbl (rax, Address(robj, roffset, Address::times_1)); break;
1.95 + case T_CHAR: __ movzwl (rax, Address(robj, roffset, Address::times_1)); break;
1.96 + case T_SHORT: __ movswl (rax, Address(robj, roffset, Address::times_1)); break;
1.97 + case T_INT: __ movl (rax, Address(robj, roffset, Address::times_1)); break;
1.98 + case T_LONG: __ movq (rax, Address(robj, roffset, Address::times_1)); break;
1.99 + default: ShouldNotReachHere();
1.100 + }
1.101 +
1.102 + if (os::is_MP()) {
1.103 + __ lea(rcounter_addr, counter);
1.104 + // ca is data dependent on rax.
1.105 + __ xorptr(rcounter_addr, rax);
1.106 + __ xorptr(rcounter_addr, rax);
1.107 + __ cmpl (rcounter, Address(rcounter_addr, 0));
1.108 + } else {
1.109 + __ cmp32 (rcounter, counter);
1.110 + }
1.111 + __ jcc (Assembler::notEqual, slow);
1.112 +
1.113 + __ ret (0);
1.114 +
1.115 + slowcase_entry_pclist[count++] = __ pc();
1.116 + __ bind (slow);
1.117 + address slow_case_addr;
1.118 + switch (type) {
1.119 + case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break;
1.120 + case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break;
1.121 + case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break;
1.122 + case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break;
1.123 + case T_INT: slow_case_addr = jni_GetIntField_addr(); break;
1.124 + case T_LONG: slow_case_addr = jni_GetLongField_addr();
1.125 + }
1.126 + // tail call
1.127 + __ jump (ExternalAddress(slow_case_addr));
1.128 +
1.129 + __ flush ();
1.130 +
1.131 + return fast_entry;
1.132 +}
1.133 +
1.134 +address JNI_FastGetField::generate_fast_get_boolean_field() {
1.135 + return generate_fast_get_int_field0(T_BOOLEAN);
1.136 +}
1.137 +
1.138 +address JNI_FastGetField::generate_fast_get_byte_field() {
1.139 + return generate_fast_get_int_field0(T_BYTE);
1.140 +}
1.141 +
1.142 +address JNI_FastGetField::generate_fast_get_char_field() {
1.143 + return generate_fast_get_int_field0(T_CHAR);
1.144 +}
1.145 +
1.146 +address JNI_FastGetField::generate_fast_get_short_field() {
1.147 + return generate_fast_get_int_field0(T_SHORT);
1.148 +}
1.149 +
1.150 +address JNI_FastGetField::generate_fast_get_int_field() {
1.151 + return generate_fast_get_int_field0(T_INT);
1.152 +}
1.153 +
1.154 +address JNI_FastGetField::generate_fast_get_long_field() {
1.155 + return generate_fast_get_int_field0(T_LONG);
1.156 +}
1.157 +
1.158 +address JNI_FastGetField::generate_fast_get_float_field0(BasicType type) {
1.159 + const char *name;
1.160 + switch (type) {
1.161 + case T_FLOAT: name = "jni_fast_GetFloatField"; break;
1.162 + case T_DOUBLE: name = "jni_fast_GetDoubleField"; break;
1.163 + default: ShouldNotReachHere();
1.164 + }
1.165 + ResourceMark rm;
1.166 + BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE);
1.167 + CodeBuffer cbuf(blob);
1.168 + MacroAssembler* masm = new MacroAssembler(&cbuf);
1.169 + address fast_entry = __ pc();
1.170 +
1.171 + Label slow;
1.172 +
1.173 + ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
1.174 + __ mov32 (rcounter, counter);
1.175 + __ mov (robj, c_rarg1);
1.176 + __ testb (rcounter, 1);
1.177 + __ jcc (Assembler::notZero, slow);
1.178 + if (os::is_MP()) {
1.179 + __ xorptr(robj, rcounter);
1.180 + __ xorptr(robj, rcounter); // obj, since
1.181 + // robj ^ rcounter ^ rcounter == robj
1.182 + // robj is data dependent on rcounter.
1.183 + }
1.184 + __ movptr(robj, Address(robj, 0)); // *obj
1.185 + __ mov (roffset, c_rarg2);
1.186 + __ shrptr(roffset, 2); // offset
1.187 +
1.188 + assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
1.189 + speculative_load_pclist[count] = __ pc();
1.190 + switch (type) {
1.191 + case T_FLOAT: __ movflt (xmm0, Address(robj, roffset, Address::times_1)); break;
1.192 + case T_DOUBLE: __ movdbl (xmm0, Address(robj, roffset, Address::times_1)); break;
1.193 + default: ShouldNotReachHere();
1.194 + }
1.195 +
1.196 + if (os::is_MP()) {
1.197 + __ lea(rcounter_addr, counter);
1.198 + __ movdq (rax, xmm0);
1.199 + // counter address is data dependent on xmm0.
1.200 + __ xorptr(rcounter_addr, rax);
1.201 + __ xorptr(rcounter_addr, rax);
1.202 + __ cmpl (rcounter, Address(rcounter_addr, 0));
1.203 + } else {
1.204 + __ cmp32 (rcounter, counter);
1.205 + }
1.206 + __ jcc (Assembler::notEqual, slow);
1.207 +
1.208 + __ ret (0);
1.209 +
1.210 + slowcase_entry_pclist[count++] = __ pc();
1.211 + __ bind (slow);
1.212 + address slow_case_addr;
1.213 + switch (type) {
1.214 + case T_FLOAT: slow_case_addr = jni_GetFloatField_addr(); break;
1.215 + case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr();
1.216 + }
1.217 + // tail call
1.218 + __ jump (ExternalAddress(slow_case_addr));
1.219 +
1.220 + __ flush ();
1.221 +
1.222 + return fast_entry;
1.223 +}
1.224 +
1.225 +address JNI_FastGetField::generate_fast_get_float_field() {
1.226 + return generate_fast_get_float_field0(T_FLOAT);
1.227 +}
1.228 +
1.229 +address JNI_FastGetField::generate_fast_get_double_field() {
1.230 + return generate_fast_get_float_field0(T_DOUBLE);
1.231 +}
