1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/cpu/x86/vm/jniFastGetField_x86_32.cpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,368 @@
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
1.38 +
1.39 +#ifdef _WINDOWS
1.40 +GetBooleanField_t JNI_FastGetField::jni_fast_GetBooleanField_fp;
1.41 +GetByteField_t JNI_FastGetField::jni_fast_GetByteField_fp;
1.42 +GetCharField_t JNI_FastGetField::jni_fast_GetCharField_fp;
1.43 +GetShortField_t JNI_FastGetField::jni_fast_GetShortField_fp;
1.44 +GetIntField_t JNI_FastGetField::jni_fast_GetIntField_fp;
1.45 +GetLongField_t JNI_FastGetField::jni_fast_GetLongField_fp;
1.46 +GetFloatField_t JNI_FastGetField::jni_fast_GetFloatField_fp;
1.47 +GetDoubleField_t JNI_FastGetField::jni_fast_GetDoubleField_fp;
1.48 +#endif
1.49 +
1.50 +// Instead of issuing lfence for LoadLoad barrier, we create data dependency
1.51 +// between loads, which is much more efficient than lfence.
1.52 +
1.53 +address JNI_FastGetField::generate_fast_get_int_field0(BasicType type) {
1.54 + const char *name;
1.55 + switch (type) {
1.56 + case T_BOOLEAN: name = "jni_fast_GetBooleanField"; break;
1.57 + case T_BYTE: name = "jni_fast_GetByteField"; break;
1.58 + case T_CHAR: name = "jni_fast_GetCharField"; break;
1.59 + case T_SHORT: name = "jni_fast_GetShortField"; break;
1.60 + case T_INT: name = "jni_fast_GetIntField"; break;
1.61 + default: ShouldNotReachHere();
1.62 + }
1.63 + ResourceMark rm;
1.64 + BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE*wordSize);
1.65 + CodeBuffer cbuf(blob);
1.66 + MacroAssembler* masm = new MacroAssembler(&cbuf);
1.67 + address fast_entry = __ pc();
1.68 +
1.69 + Label slow;
1.70 +
1.71 + // stack layout: offset from rsp (in words):
1.72 + // return pc 0
1.73 + // jni env 1
1.74 + // obj 2
1.75 + // jfieldID 3
1.76 +
1.77 + ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
1.78 + __ mov32 (rcx, counter);
1.79 + __ testb (rcx, 1);
1.80 + __ jcc (Assembler::notZero, slow);
1.81 + if (os::is_MP()) {
1.82 + __ mov(rax, rcx);
1.83 + __ andptr(rax, 1); // rax, must end up 0
1.84 + __ movptr(rdx, Address(rsp, rax, Address::times_1, 2*wordSize));
1.85 + // obj, notice rax, is 0.
1.86 + // rdx is data dependent on rcx.
1.87 + } else {
1.88 + __ movptr (rdx, Address(rsp, 2*wordSize)); // obj
1.89 + }
1.90 + __ movptr(rax, Address(rsp, 3*wordSize)); // jfieldID
1.91 + __ movptr(rdx, Address(rdx, 0)); // *obj
1.92 + __ shrptr (rax, 2); // offset
1.93 +
1.94 + assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
1.95 + speculative_load_pclist[count] = __ pc();
1.96 + switch (type) {
1.97 + case T_BOOLEAN: __ movzbl (rax, Address(rdx, rax, Address::times_1)); break;
1.98 + case T_BYTE: __ movsbl (rax, Address(rdx, rax, Address::times_1)); break;
1.99 + case T_CHAR: __ movzwl (rax, Address(rdx, rax, Address::times_1)); break;
1.100 + case T_SHORT: __ movswl (rax, Address(rdx, rax, Address::times_1)); break;
1.101 + case T_INT: __ movl (rax, Address(rdx, rax, Address::times_1)); break;
1.102 + default: ShouldNotReachHere();
1.103 + }
1.104 +
1.105 + Address ca1;
1.106 + if (os::is_MP()) {
1.107 + __ lea(rdx, counter);
1.108 + __ xorptr(rdx, rax);
1.109 + __ xorptr(rdx, rax);
1.110 + __ cmp32(rcx, Address(rdx, 0));
1.111 + // ca1 is the same as ca because
1.112 + // rax, ^ counter_addr ^ rax, = address
1.113 + // ca1 is data dependent on rax,.
1.114 + } else {
1.115 + __ cmp32(rcx, counter);
1.116 + }
1.117 + __ jcc (Assembler::notEqual, slow);
1.118 +
1.119 +#ifndef _WINDOWS
1.120 + __ ret (0);
1.121 +#else
1.122 + // __stdcall calling convention
1.123 + __ ret (3*wordSize);
1.124 +#endif
1.125 +
1.126 + slowcase_entry_pclist[count++] = __ pc();
1.127 + __ bind (slow);
1.128 + address slow_case_addr;
1.129 + switch (type) {
1.130 + case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break;
1.131 + case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break;
1.132 + case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break;
1.133 + case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break;
1.134 + case T_INT: slow_case_addr = jni_GetIntField_addr();
1.135 + }
1.136 + // tail call
1.137 + __ jump (ExternalAddress(slow_case_addr));
1.138 +
1.139 + __ flush ();
1.140 +
1.141 +#ifndef _WINDOWS
1.142 + return fast_entry;
1.143 +#else
1.144 + switch (type) {
1.145 + case T_BOOLEAN: jni_fast_GetBooleanField_fp = (GetBooleanField_t) fast_entry; break;
1.146 + case T_BYTE: jni_fast_GetByteField_fp = (GetByteField_t) fast_entry; break;
1.147 + case T_CHAR: jni_fast_GetCharField_fp = (GetCharField_t) fast_entry; break;
1.148 + case T_SHORT: jni_fast_GetShortField_fp = (GetShortField_t) fast_entry; break;
1.149 + case T_INT: jni_fast_GetIntField_fp = (GetIntField_t) fast_entry; break;
1.150 + }
1.151 + return os::win32::fast_jni_accessor_wrapper(type);
1.152 +#endif
1.153 +}
1.154 +
1.155 +address JNI_FastGetField::generate_fast_get_boolean_field() {
1.156 + return generate_fast_get_int_field0(T_BOOLEAN);
1.157 +}
1.158 +
1.159 +address JNI_FastGetField::generate_fast_get_byte_field() {
1.160 + return generate_fast_get_int_field0(T_BYTE);
1.161 +}
1.162 +
1.163 +address JNI_FastGetField::generate_fast_get_char_field() {
1.164 + return generate_fast_get_int_field0(T_CHAR);
1.165 +}
1.166 +
1.167 +address JNI_FastGetField::generate_fast_get_short_field() {
1.168 + return generate_fast_get_int_field0(T_SHORT);
1.169 +}
1.170 +
1.171 +address JNI_FastGetField::generate_fast_get_int_field() {
1.172 + return generate_fast_get_int_field0(T_INT);
1.173 +}
1.174 +
1.175 +address JNI_FastGetField::generate_fast_get_long_field() {
1.176 + const char *name = "jni_fast_GetLongField";
1.177 + ResourceMark rm;
1.178 + BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE*wordSize);
1.179 + CodeBuffer cbuf(blob);
1.180 + MacroAssembler* masm = new MacroAssembler(&cbuf);
1.181 + address fast_entry = __ pc();
1.182 +
1.183 + Label slow;
1.184 +
1.185 + // stack layout: offset from rsp (in words):
1.186 + // old rsi 0
1.187 + // return pc 1
1.188 + // jni env 2
1.189 + // obj 3
1.190 + // jfieldID 4
1.191 +
1.192 + ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
1.193 +
1.194 + __ push (rsi);
1.195 + __ mov32 (rcx, counter);
1.196 + __ testb (rcx, 1);
1.197 + __ jcc (Assembler::notZero, slow);
1.198 + if (os::is_MP()) {
1.199 + __ mov(rax, rcx);
1.200 + __ andptr(rax, 1); // rax, must end up 0
1.201 + __ movptr(rdx, Address(rsp, rax, Address::times_1, 3*wordSize));
1.202 + // obj, notice rax, is 0.
1.203 + // rdx is data dependent on rcx.
1.204 + } else {
1.205 + __ movptr(rdx, Address(rsp, 3*wordSize)); // obj
1.206 + }
1.207 + __ movptr(rsi, Address(rsp, 4*wordSize)); // jfieldID
1.208 + __ movptr(rdx, Address(rdx, 0)); // *obj
1.209 + __ shrptr(rsi, 2); // offset
1.210 +
1.211 + assert(count < LIST_CAPACITY-1, "LIST_CAPACITY too small");
1.212 + speculative_load_pclist[count++] = __ pc();
1.213 + __ movptr(rax, Address(rdx, rsi, Address::times_1));
1.214 +#ifndef _LP64
1.215 + speculative_load_pclist[count] = __ pc();
1.216 + __ movl(rdx, Address(rdx, rsi, Address::times_1, 4));
1.217 +#endif // _LP64
1.218 +
1.219 + if (os::is_MP()) {
1.220 + __ lea(rsi, counter);
1.221 + __ xorptr(rsi, rdx);
1.222 + __ xorptr(rsi, rax);
1.223 + __ xorptr(rsi, rdx);
1.224 + __ xorptr(rsi, rax);
1.225 + __ cmp32(rcx, Address(rsi, 0));
1.226 + // ca1 is the same as ca because
1.227 + // rax, ^ rdx ^ counter_addr ^ rax, ^ rdx = address
1.228 + // ca1 is data dependent on both rax, and rdx.
1.229 + } else {
1.230 + __ cmp32(rcx, counter);
1.231 + }
1.232 + __ jcc (Assembler::notEqual, slow);
1.233 +
1.234 + __ pop (rsi);
1.235 +
1.236 +#ifndef _WINDOWS
1.237 + __ ret (0);
1.238 +#else
1.239 + // __stdcall calling convention
1.240 + __ ret (3*wordSize);
1.241 +#endif
1.242 +
1.243 + slowcase_entry_pclist[count-1] = __ pc();
1.244 + slowcase_entry_pclist[count++] = __ pc();
1.245 + __ bind (slow);
1.246 + __ pop (rsi);
1.247 + address slow_case_addr = jni_GetLongField_addr();;
1.248 + // tail call
1.249 + __ jump (ExternalAddress(slow_case_addr));
1.250 +
1.251 + __ flush ();
1.252 +
1.253 +#ifndef _WINDOWS
1.254 + return fast_entry;
1.255 +#else
1.256 + jni_fast_GetLongField_fp = (GetLongField_t) fast_entry;
1.257 + return os::win32::fast_jni_accessor_wrapper(T_LONG);
1.258 +#endif
1.259 +}
1.260 +
1.261 +address JNI_FastGetField::generate_fast_get_float_field0(BasicType type) {
1.262 + const char *name;
1.263 + switch (type) {
1.264 + case T_FLOAT: name = "jni_fast_GetFloatField"; break;
1.265 + case T_DOUBLE: name = "jni_fast_GetDoubleField"; break;
1.266 + default: ShouldNotReachHere();
1.267 + }
1.268 + ResourceMark rm;
1.269 + BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE*wordSize);
1.270 + CodeBuffer cbuf(blob);
1.271 + MacroAssembler* masm = new MacroAssembler(&cbuf);
1.272 + address fast_entry = __ pc();
1.273 +
1.274 + Label slow_with_pop, slow;
1.275 +
1.276 + // stack layout: offset from rsp (in words):
1.277 + // return pc 0
1.278 + // jni env 1
1.279 + // obj 2
1.280 + // jfieldID 3
1.281 +
1.282 + ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
1.283 +
1.284 + __ mov32 (rcx, counter);
1.285 + __ testb (rcx, 1);
1.286 + __ jcc (Assembler::notZero, slow);
1.287 + if (os::is_MP()) {
1.288 + __ mov(rax, rcx);
1.289 + __ andptr(rax, 1); // rax, must end up 0
1.290 + __ movptr(rdx, Address(rsp, rax, Address::times_1, 2*wordSize));
1.291 + // obj, notice rax, is 0.
1.292 + // rdx is data dependent on rcx.
1.293 + } else {
1.294 + __ movptr(rdx, Address(rsp, 2*wordSize)); // obj
1.295 + }
1.296 + __ movptr(rax, Address(rsp, 3*wordSize)); // jfieldID
1.297 + __ movptr(rdx, Address(rdx, 0)); // *obj
1.298 + __ shrptr(rax, 2); // offset
1.299 +
1.300 + assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
1.301 + speculative_load_pclist[count] = __ pc();
1.302 + switch (type) {
1.303 +#ifndef _LP64
1.304 + case T_FLOAT: __ fld_s (Address(rdx, rax, Address::times_1)); break;
1.305 + case T_DOUBLE: __ fld_d (Address(rdx, rax, Address::times_1)); break;
1.306 +#else
1.307 + case T_FLOAT: __ movflt (xmm0, Address(robj, roffset, Address::times_1)); break;
1.308 + case T_DOUBLE: __ movdbl (xmm0, Address(robj, roffset, Address::times_1)); break;
1.309 +#endif // _LP64
1.310 + default: ShouldNotReachHere();
1.311 + }
1.312 +
1.313 + Address ca1;
1.314 + if (os::is_MP()) {
1.315 + __ fst_s (Address(rsp, -4));
1.316 + __ lea(rdx, counter);
1.317 + __ movl (rax, Address(rsp, -4));
1.318 + // garbage hi-order bits on 64bit are harmless.
1.319 + __ xorptr(rdx, rax);
1.320 + __ xorptr(rdx, rax);
1.321 + __ cmp32(rcx, Address(rdx, 0));
1.322 + // rax, ^ counter_addr ^ rax, = address
1.323 + // ca1 is data dependent on the field
1.324 + // access.
1.325 + } else {
1.326 + __ cmp32(rcx, counter);
1.327 + }
1.328 + __ jcc (Assembler::notEqual, slow_with_pop);
1.329 +
1.330 +#ifndef _WINDOWS
1.331 + __ ret (0);
1.332 +#else
1.333 + // __stdcall calling convention
1.334 + __ ret (3*wordSize);
1.335 +#endif
1.336 +
1.337 + __ bind (slow_with_pop);
1.338 + // invalid load. pop FPU stack.
1.339 + __ fstp_d (0);
1.340 +
1.341 + slowcase_entry_pclist[count++] = __ pc();
1.342 + __ bind (slow);
1.343 + address slow_case_addr;
1.344 + switch (type) {
1.345 + case T_FLOAT: slow_case_addr = jni_GetFloatField_addr(); break;
1.346 + case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr(); break;
1.347 + default: ShouldNotReachHere();
1.348 + }
1.349 + // tail call
1.350 + __ jump (ExternalAddress(slow_case_addr));
1.351 +
1.352 + __ flush ();
1.353 +
1.354 +#ifndef _WINDOWS
1.355 + return fast_entry;
1.356 +#else
1.357 + switch (type) {
1.358 + case T_FLOAT: jni_fast_GetFloatField_fp = (GetFloatField_t) fast_entry; break;
1.359 + case T_DOUBLE: jni_fast_GetDoubleField_fp = (GetDoubleField_t) fast_entry; break;
1.360 + }
1.361 + return os::win32::fast_jni_accessor_wrapper(type);
1.362 +#endif
1.363 +}
1.364 +
1.365 +address JNI_FastGetField::generate_fast_get_float_field() {
1.366 + return generate_fast_get_float_field0(T_FLOAT);
1.367 +}
1.368 +
1.369 +address JNI_FastGetField::generate_fast_get_double_field() {
1.370 + return generate_fast_get_float_field0(T_DOUBLE);
1.371 +}
