1 /*
2 * Copyright (c) 2004, 2017, 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.inline.hpp"
27 #include "memory/resourceArea.hpp"
28 #include "prims/jniFastGetField.hpp"
29 #include "prims/jvm_misc.hpp"
30 #include "runtime/safepoint.hpp"
31
32 // TSO ensures that loads are blocking and ordered with respect to
33 // to earlier loads, so we don't need LoadLoad membars.
34
35 #define __ masm->
36
37 #define BUFFER_SIZE 30*sizeof(jint)
38
39 // Common register usage:
40 // O0: env
41 // O1: obj
42 // O2: jfieldID
43 // O4: offset (O2 >> 2)
44 // G4: old safepoint counter
45
46 address JNI_FastGetField::generate_fast_get_int_field0(BasicType type) {
47 const char *name;
48 switch (type) {
49 case T_BOOLEAN: name = "jni_fast_GetBooleanField"; break;
50 case T_BYTE: name = "jni_fast_GetByteField"; break;
51 case T_CHAR: name = "jni_fast_GetCharField"; break;
52 case T_SHORT: name = "jni_fast_GetShortField"; break;
53 case T_INT: name = "jni_fast_GetIntField"; break;
54 default: ShouldNotReachHere();
55 }
56 ResourceMark rm;
57 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE*wordSize);
58 CodeBuffer cbuf(blob);
59 MacroAssembler* masm = new MacroAssembler(&cbuf);
60 address fast_entry = __ pc();
61
62 Label label1, label2;
63
64 AddressLiteral cnt_addrlit(SafepointSynchronize::safepoint_counter_addr());
65 __ sethi (cnt_addrlit, O3);
66 Address cnt_addr(O3, cnt_addrlit.low10());
67 __ ld (cnt_addr, G4);
68 __ andcc (G4, 1, G0);
69 __ br (Assembler::notZero, false, Assembler::pn, label1);
70 __ delayed()->andcc(O1, JNIHandles::weak_tag_mask, G0); // Test for jweak
71
72 // Annul the resolving load if it is a jweak
73 __ br(Assembler::notZero, true, Assembler::pt, label1);
74 __ delayed()->ld_ptr (O1, 0, O5);
75
76 __ srl(O2, 2, O4);
77
78 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
79 speculative_load_pclist[count] = __ pc();
80 switch (type) {
81 case T_BOOLEAN: __ ldub (O5, O4, G3); break;
82 case T_BYTE: __ ldsb (O5, O4, G3); break;
83 case T_CHAR: __ lduh (O5, O4, G3); break;
84 case T_SHORT: __ ldsh (O5, O4, G3); break;
85 case T_INT: __ ld (O5, O4, G3); break;
86 default: ShouldNotReachHere();
87 }
88
89 __ ld (cnt_addr, O5);
90 __ cmp (O5, G4);
91 __ br (Assembler::notEqual, false, Assembler::pn, label2);
92 __ delayed()->mov (O7, G1);
93 __ retl ();
94 __ delayed()->mov (G3, O0);
95
96 slowcase_entry_pclist[count++] = __ pc();
97 __ bind (label1);
98 __ mov (O7, G1);
99
100 address slow_case_addr;
101 switch (type) {
102 case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break;
103 case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break;
104 case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break;
105 case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break;
106 case T_INT: slow_case_addr = jni_GetIntField_addr(); break;
107 default: ShouldNotReachHere();
108 }
109 __ bind (label2);
110 __ call (slow_case_addr, relocInfo::none);
111 __ delayed()->mov (G1, O7);
112
113 __ flush ();
114
115 return fast_entry;
116 }
117
118 address JNI_FastGetField::generate_fast_get_boolean_field() {
119 return generate_fast_get_int_field0(T_BOOLEAN);
120 }
121
122 address JNI_FastGetField::generate_fast_get_byte_field() {
123 return generate_fast_get_int_field0(T_BYTE);
124 }
125
126 address JNI_FastGetField::generate_fast_get_char_field() {
127 return generate_fast_get_int_field0(T_CHAR);
128 }
129
130 address JNI_FastGetField::generate_fast_get_short_field() {
131 return generate_fast_get_int_field0(T_SHORT);
132 }
133
134 address JNI_FastGetField::generate_fast_get_int_field() {
135 return generate_fast_get_int_field0(T_INT);
136 }
137
138 address JNI_FastGetField::generate_fast_get_long_field() {
139 const char *name = "jni_fast_GetLongField";
140 ResourceMark rm;
141 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE*wordSize);
142 CodeBuffer cbuf(blob);
143 MacroAssembler* masm = new MacroAssembler(&cbuf);
144 address fast_entry = __ pc();
145
146 Label label1, label2;
147
148 AddressLiteral cnt_addrlit(SafepointSynchronize::safepoint_counter_addr());
149 __ sethi (cnt_addrlit, G3);
150 Address cnt_addr(G3, cnt_addrlit.low10());
151 __ ld (cnt_addr, G4);
152 __ andcc (G4, 1, G0);
153 __ br (Assembler::notZero, false, Assembler::pn, label1);
154 __ delayed()->srl (O2, 2, O4);
155 __ andn (O1, JNIHandles::weak_tag_mask, O1);
156 __ ld_ptr (O1, 0, O5);
157 __ add (O5, O4, O5);
158
159 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
160 speculative_load_pclist[count] = __ pc();
161 __ ldx (O5, 0, O3);
162
163 __ ld (cnt_addr, G1);
164 __ cmp (G1, G4);
165 __ br (Assembler::notEqual, false, Assembler::pn, label2);
166 __ delayed()->mov (O7, G1);
167
168 __ retl ();
169 __ delayed()->mov (O3, O0);
170
171 slowcase_entry_pclist[count++] = __ pc();
172
173 __ bind (label1);
174 __ mov (O7, G1);
175
176 address slow_case_addr = jni_GetLongField_addr();
177 __ bind (label2);
178 __ call (slow_case_addr, relocInfo::none);
179 __ delayed()->mov (G1, O7);
180
181 __ flush ();
182
183 return fast_entry;
184 }
185
186 address JNI_FastGetField::generate_fast_get_float_field0(BasicType type) {
187 const char *name;
188 switch (type) {
189 case T_FLOAT: name = "jni_fast_GetFloatField"; break;
190 case T_DOUBLE: name = "jni_fast_GetDoubleField"; break;
191 default: ShouldNotReachHere();
192 }
193 ResourceMark rm;
194 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE*wordSize);
195 CodeBuffer cbuf(blob);
196 MacroAssembler* masm = new MacroAssembler(&cbuf);
197 address fast_entry = __ pc();
198
199 Label label1, label2;
200
201 AddressLiteral cnt_addrlit(SafepointSynchronize::safepoint_counter_addr());
202 __ sethi (cnt_addrlit, O3);
203 Address cnt_addr(O3, cnt_addrlit.low10());
204 __ ld (cnt_addr, G4);
205 __ andcc (G4, 1, G0);
206 __ br (Assembler::notZero, false, Assembler::pn, label1);
207 __ delayed()->srl (O2, 2, O4);
208 __ andn (O1, JNIHandles::weak_tag_mask, O1);
209 __ ld_ptr (O1, 0, O5);
210
211 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
212 speculative_load_pclist[count] = __ pc();
213 switch (type) {
214 case T_FLOAT: __ ldf (FloatRegisterImpl::S, O5, O4, F0); break;
215 case T_DOUBLE: __ ldf (FloatRegisterImpl::D, O5, O4, F0); break;
216 default: ShouldNotReachHere();
217 }
218
219 __ ld (cnt_addr, O5);
220 __ cmp (O5, G4);
221 __ br (Assembler::notEqual, false, Assembler::pn, label2);
222 __ delayed()->mov (O7, G1);
223
224 __ retl ();
225 __ delayed()-> nop ();
226
227 slowcase_entry_pclist[count++] = __ pc();
228 __ bind (label1);
229 __ mov (O7, G1);
230
231 address slow_case_addr;
232 switch (type) {
233 case T_FLOAT: slow_case_addr = jni_GetFloatField_addr(); break;
234 case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr(); break;
235 default: ShouldNotReachHere();
236 }
237 __ bind (label2);
238 __ call (slow_case_addr, relocInfo::none);
239 __ delayed()->mov (G1, O7);
240
241 __ flush ();
242
243 return fast_entry;
244 }
245
246 address JNI_FastGetField::generate_fast_get_float_field() {
247 return generate_fast_get_float_field0(T_FLOAT);
248 }
249
250 address JNI_FastGetField::generate_fast_get_double_field() {
251 return generate_fast_get_float_field0(T_DOUBLE);
252 }