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()->srl (O2, 2, O4);
71 __ andn (O1, JNIHandles::weak_tag_mask, O1);
72 __ ld_ptr (O1, 0, O5);
73
74 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
75 speculative_load_pclist[count] = __ pc();
76 switch (type) {
77 case T_BOOLEAN: __ ldub (O5, O4, G3); break;
78 case T_BYTE: __ ldsb (O5, O4, G3); break;
79 case T_CHAR: __ lduh (O5, O4, G3); break;
80 case T_SHORT: __ ldsh (O5, O4, G3); break;
81 case T_INT: __ ld (O5, O4, G3); break;
82 default: ShouldNotReachHere();
83 }
84
85 __ ld (cnt_addr, O5);
86 __ cmp (O5, G4);
87 __ br (Assembler::notEqual, false, Assembler::pn, label2);
88 __ delayed()->mov (O7, G1);
89 __ retl ();
90 __ delayed()->mov (G3, O0);
91
92 slowcase_entry_pclist[count++] = __ pc();
93 __ bind (label1);
94 __ mov (O7, G1);
95
96 address slow_case_addr;
97 switch (type) {
98 case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break;
99 case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break;
100 case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break;
101 case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break;
102 case T_INT: slow_case_addr = jni_GetIntField_addr(); break;
103 default: ShouldNotReachHere();
104 }
105 __ bind (label2);
106 __ call (slow_case_addr, relocInfo::none);
107 __ delayed()->mov (G1, O7);
108
109 __ flush ();
110
111 return fast_entry;
112 }
113
114 address JNI_FastGetField::generate_fast_get_boolean_field() {
115 return generate_fast_get_int_field0(T_BOOLEAN);
116 }
117
118 address JNI_FastGetField::generate_fast_get_byte_field() {
119 return generate_fast_get_int_field0(T_BYTE);
120 }
121
122 address JNI_FastGetField::generate_fast_get_char_field() {
123 return generate_fast_get_int_field0(T_CHAR);
124 }
125
126 address JNI_FastGetField::generate_fast_get_short_field() {
127 return generate_fast_get_int_field0(T_SHORT);
128 }
129
130 address JNI_FastGetField::generate_fast_get_int_field() {
131 return generate_fast_get_int_field0(T_INT);
132 }
133
134 address JNI_FastGetField::generate_fast_get_long_field() {
135 const char *name = "jni_fast_GetLongField";
136 ResourceMark rm;
137 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE*wordSize);
138 CodeBuffer cbuf(blob);
139 MacroAssembler* masm = new MacroAssembler(&cbuf);
140 address fast_entry = __ pc();
141
142 Label label1, label2;
143
144 AddressLiteral cnt_addrlit(SafepointSynchronize::safepoint_counter_addr());
145 __ sethi (cnt_addrlit, G3);
146 Address cnt_addr(G3, cnt_addrlit.low10());
147 __ ld (cnt_addr, G4);
148 __ andcc (G4, 1, G0);
149 __ br (Assembler::notZero, false, Assembler::pn, label1);
150 __ delayed()->srl (O2, 2, O4);
151 __ andn (O1, JNIHandles::weak_tag_mask, O1);
152 __ ld_ptr (O1, 0, O5);
153 __ add (O5, O4, O5);
154
155 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
156 speculative_load_pclist[count] = __ pc();
157 __ ldx (O5, 0, O3);
158
159 __ ld (cnt_addr, G1);
160 __ cmp (G1, G4);
161 __ br (Assembler::notEqual, false, Assembler::pn, label2);
162 __ delayed()->mov (O7, G1);
163
164 __ retl ();
165 __ delayed()->mov (O3, O0);
166
167 slowcase_entry_pclist[count++] = __ pc();
168
169 __ bind (label1);
170 __ mov (O7, G1);
171
172 address slow_case_addr = jni_GetLongField_addr();
173 __ bind (label2);
174 __ call (slow_case_addr, relocInfo::none);
175 __ delayed()->mov (G1, O7);
176
177 __ flush ();
178
179 return fast_entry;
180 }
181
182 address JNI_FastGetField::generate_fast_get_float_field0(BasicType type) {
183 const char *name;
184 switch (type) {
185 case T_FLOAT: name = "jni_fast_GetFloatField"; break;
186 case T_DOUBLE: name = "jni_fast_GetDoubleField"; break;
187 default: ShouldNotReachHere();
188 }
189 ResourceMark rm;
190 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE*wordSize);
191 CodeBuffer cbuf(blob);
192 MacroAssembler* masm = new MacroAssembler(&cbuf);
193 address fast_entry = __ pc();
194
195 Label label1, label2;
196
197 AddressLiteral cnt_addrlit(SafepointSynchronize::safepoint_counter_addr());
198 __ sethi (cnt_addrlit, O3);
199 Address cnt_addr(O3, cnt_addrlit.low10());
200 __ ld (cnt_addr, G4);
201 __ andcc (G4, 1, G0);
202 __ br (Assembler::notZero, false, Assembler::pn, label1);
203 __ delayed()->srl (O2, 2, O4);
204 __ andn (O1, JNIHandles::weak_tag_mask, O1);
205 __ ld_ptr (O1, 0, O5);
206
207 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
208 speculative_load_pclist[count] = __ pc();
209 switch (type) {
210 case T_FLOAT: __ ldf (FloatRegisterImpl::S, O5, O4, F0); break;
211 case T_DOUBLE: __ ldf (FloatRegisterImpl::D, O5, O4, F0); break;
212 default: ShouldNotReachHere();
213 }
214
215 __ ld (cnt_addr, O5);
216 __ cmp (O5, G4);
217 __ br (Assembler::notEqual, false, Assembler::pn, label2);
218 __ delayed()->mov (O7, G1);
219
220 __ retl ();
221 __ delayed()-> nop ();
222
223 slowcase_entry_pclist[count++] = __ pc();
224 __ bind (label1);
225 __ mov (O7, G1);
226
227 address slow_case_addr;
228 switch (type) {
229 case T_FLOAT: slow_case_addr = jni_GetFloatField_addr(); break;
230 case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr(); break;
231 default: ShouldNotReachHere();
232 }
233 __ bind (label2);
234 __ call (slow_case_addr, relocInfo::none);
235 __ delayed()->mov (G1, O7);
236
237 __ flush ();
238
239 return fast_entry;
240 }
241
242 address JNI_FastGetField::generate_fast_get_float_field() {
243 return generate_fast_get_float_field0(T_FLOAT);
244 }
245
246 address JNI_FastGetField::generate_fast_get_double_field() {
247 return generate_fast_get_float_field0(T_DOUBLE);
248 }