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comparison: src/cpu/x86/vm/jniFastGetField_x86_64.cpp
src/cpu/x86/vm/jniFastGetField_x86_64.cpp
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| 1 /* | |
| 2 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "precompiled.hpp" | |
| 26 #include "asm/macroAssembler.hpp" | |
| 27 #include "memory/resourceArea.hpp" | |
| 28 #include "prims/jniFastGetField.hpp" | |
| 29 #include "prims/jvm_misc.hpp" | |
| 30 #include "runtime/safepoint.hpp" | |
| 31 | |
| 32 #define __ masm-> | |
| 33 | |
| 34 #define BUFFER_SIZE 30*wordSize | |
| 35 | |
| 36 // Instead of issuing lfence for LoadLoad barrier, we create data dependency | |
| 37 // between loads, which is more efficient than lfence. | |
| 38 | |
| 39 // Common register usage: | |
| 40 // rax/xmm0: result | |
| 41 // c_rarg0: jni env | |
| 42 // c_rarg1: obj | |
| 43 // c_rarg2: jfield id | |
| 44 | |
| 45 static const Register robj = r9; | |
| 46 static const Register rcounter = r10; | |
| 47 static const Register roffset = r11; | |
| 48 static const Register rcounter_addr = r11; | |
| 49 | |
| 50 // Warning: do not use rip relative addressing after the first counter load | |
| 51 // since that may scratch r10! | |
| 52 | |
| 53 address JNI_FastGetField::generate_fast_get_int_field0(BasicType type) { | |
| 54 const char *name; | |
| 55 switch (type) { | |
| 56 case T_BOOLEAN: name = "jni_fast_GetBooleanField"; break; | |
| 57 case T_BYTE: name = "jni_fast_GetByteField"; break; | |
| 58 case T_CHAR: name = "jni_fast_GetCharField"; break; | |
| 59 case T_SHORT: name = "jni_fast_GetShortField"; break; | |
| 60 case T_INT: name = "jni_fast_GetIntField"; break; | |
| 61 case T_LONG: name = "jni_fast_GetLongField"; break; | |
| 62 default: ShouldNotReachHere(); | |
| 63 } | |
| 64 ResourceMark rm; | |
| 65 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE); | |
| 66 CodeBuffer cbuf(blob); | |
| 67 MacroAssembler* masm = new MacroAssembler(&cbuf); | |
| 68 address fast_entry = __ pc(); | |
| 69 | |
| 70 Label slow; | |
| 71 | |
| 72 ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr()); | |
| 73 __ mov32 (rcounter, counter); | |
| 74 __ mov (robj, c_rarg1); | |
| 75 __ testb (rcounter, 1); | |
| 76 __ jcc (Assembler::notZero, slow); | |
| 77 if (os::is_MP()) { | |
| 78 __ xorptr(robj, rcounter); | |
| 79 __ xorptr(robj, rcounter); // obj, since | |
| 80 // robj ^ rcounter ^ rcounter == robj | |
| 81 // robj is data dependent on rcounter. | |
| 82 } | |
| 83 __ movptr(robj, Address(robj, 0)); // *obj | |
| 84 __ mov (roffset, c_rarg2); | |
| 85 __ shrptr(roffset, 2); // offset | |
| 86 | |
| 87 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small"); | |
| 88 speculative_load_pclist[count] = __ pc(); | |
| 89 switch (type) { | |
| 90 case T_BOOLEAN: __ movzbl (rax, Address(robj, roffset, Address::times_1)); break; | |
| 91 case T_BYTE: __ movsbl (rax, Address(robj, roffset, Address::times_1)); break; | |
| 92 case T_CHAR: __ movzwl (rax, Address(robj, roffset, Address::times_1)); break; | |
| 93 case T_SHORT: __ movswl (rax, Address(robj, roffset, Address::times_1)); break; | |
| 94 case T_INT: __ movl (rax, Address(robj, roffset, Address::times_1)); break; | |
| 95 case T_LONG: __ movq (rax, Address(robj, roffset, Address::times_1)); break; | |
| 96 default: ShouldNotReachHere(); | |
| 97 } | |
| 98 | |
| 99 if (os::is_MP()) { | |
| 100 __ lea(rcounter_addr, counter); | |
| 101 // ca is data dependent on rax. | |
| 102 __ xorptr(rcounter_addr, rax); | |
| 103 __ xorptr(rcounter_addr, rax); | |
| 104 __ cmpl (rcounter, Address(rcounter_addr, 0)); | |
| 105 } else { | |
| 106 __ cmp32 (rcounter, counter); | |
| 107 } | |
| 108 __ jcc (Assembler::notEqual, slow); | |
| 109 | |
| 110 __ ret (0); | |
| 111 | |
| 112 slowcase_entry_pclist[count++] = __ pc(); | |
| 113 __ bind (slow); | |
| 114 address slow_case_addr; | |
| 115 switch (type) { | |
| 116 case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break; | |
| 117 case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break; | |
| 118 case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break; | |
| 119 case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break; | |
| 120 case T_INT: slow_case_addr = jni_GetIntField_addr(); break; | |
| 121 case T_LONG: slow_case_addr = jni_GetLongField_addr(); | |
| 122 } | |
| 123 // tail call | |
| 124 __ jump (ExternalAddress(slow_case_addr)); | |
| 125 | |
| 126 __ flush (); | |
| 127 | |
| 128 return fast_entry; | |
| 129 } | |
| 130 | |
| 131 address JNI_FastGetField::generate_fast_get_boolean_field() { | |
| 132 return generate_fast_get_int_field0(T_BOOLEAN); | |
| 133 } | |
| 134 | |
| 135 address JNI_FastGetField::generate_fast_get_byte_field() { | |
| 136 return generate_fast_get_int_field0(T_BYTE); | |
| 137 } | |
| 138 | |
| 139 address JNI_FastGetField::generate_fast_get_char_field() { | |
| 140 return generate_fast_get_int_field0(T_CHAR); | |
| 141 } | |
| 142 | |
| 143 address JNI_FastGetField::generate_fast_get_short_field() { | |
| 144 return generate_fast_get_int_field0(T_SHORT); | |
| 145 } | |
| 146 | |
| 147 address JNI_FastGetField::generate_fast_get_int_field() { | |
| 148 return generate_fast_get_int_field0(T_INT); | |
| 149 } | |
| 150 | |
| 151 address JNI_FastGetField::generate_fast_get_long_field() { | |
| 152 return generate_fast_get_int_field0(T_LONG); | |
| 153 } | |
| 154 | |
| 155 address JNI_FastGetField::generate_fast_get_float_field0(BasicType type) { | |
| 156 const char *name; | |
| 157 switch (type) { | |
| 158 case T_FLOAT: name = "jni_fast_GetFloatField"; break; | |
| 159 case T_DOUBLE: name = "jni_fast_GetDoubleField"; break; | |
| 160 default: ShouldNotReachHere(); | |
| 161 } | |
| 162 ResourceMark rm; | |
| 163 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE); | |
| 164 CodeBuffer cbuf(blob); | |
| 165 MacroAssembler* masm = new MacroAssembler(&cbuf); | |
| 166 address fast_entry = __ pc(); | |
| 167 | |
| 168 Label slow; | |
| 169 | |
| 170 ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr()); | |
| 171 __ mov32 (rcounter, counter); | |
| 172 __ mov (robj, c_rarg1); | |
| 173 __ testb (rcounter, 1); | |
| 174 __ jcc (Assembler::notZero, slow); | |
| 175 if (os::is_MP()) { | |
| 176 __ xorptr(robj, rcounter); | |
| 177 __ xorptr(robj, rcounter); // obj, since | |
| 178 // robj ^ rcounter ^ rcounter == robj | |
| 179 // robj is data dependent on rcounter. | |
| 180 } | |
| 181 __ movptr(robj, Address(robj, 0)); // *obj | |
| 182 __ mov (roffset, c_rarg2); | |
| 183 __ shrptr(roffset, 2); // offset | |
| 184 | |
| 185 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small"); | |
| 186 speculative_load_pclist[count] = __ pc(); | |
| 187 switch (type) { | |
| 188 case T_FLOAT: __ movflt (xmm0, Address(robj, roffset, Address::times_1)); break; | |
| 189 case T_DOUBLE: __ movdbl (xmm0, Address(robj, roffset, Address::times_1)); break; | |
| 190 default: ShouldNotReachHere(); | |
| 191 } | |
| 192 | |
| 193 if (os::is_MP()) { | |
| 194 __ lea(rcounter_addr, counter); | |
| 195 __ movdq (rax, xmm0); | |
| 196 // counter address is data dependent on xmm0. | |
| 197 __ xorptr(rcounter_addr, rax); | |
| 198 __ xorptr(rcounter_addr, rax); | |
| 199 __ cmpl (rcounter, Address(rcounter_addr, 0)); | |
| 200 } else { | |
| 201 __ cmp32 (rcounter, counter); | |
| 202 } | |
| 203 __ jcc (Assembler::notEqual, slow); | |
| 204 | |
| 205 __ ret (0); | |
| 206 | |
| 207 slowcase_entry_pclist[count++] = __ pc(); | |
| 208 __ bind (slow); | |
| 209 address slow_case_addr; | |
| 210 switch (type) { | |
| 211 case T_FLOAT: slow_case_addr = jni_GetFloatField_addr(); break; | |
| 212 case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr(); | |
| 213 } | |
| 214 // tail call | |
| 215 __ jump (ExternalAddress(slow_case_addr)); | |
| 216 | |
| 217 __ flush (); | |
| 218 | |
| 219 return fast_entry; | |
| 220 } | |
| 221 | |
| 222 address JNI_FastGetField::generate_fast_get_float_field() { | |
| 223 return generate_fast_get_float_field0(T_FLOAT); | |
| 224 } | |
| 225 | |
| 226 address JNI_FastGetField::generate_fast_get_double_field() { | |
| 227 return generate_fast_get_float_field0(T_DOUBLE); | |
| 228 } |
