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.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 __ ld_ptr (O1, 0, O5);
72
73 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
74 speculative_load_pclist[count] = __ pc();
75 switch (type) {
76 case T_BOOLEAN: __ ldub (O5, O4, G3); break;
77 case T_BYTE: __ ldsb (O5, O4, G3); break;
78 case T_CHAR: __ lduh (O5, O4, G3); break;
79 case T_SHORT: __ ldsh (O5, O4, G3); break;
80 case T_INT: __ ld (O5, O4, G3); break;
81 default: ShouldNotReachHere();
82 }
83
84 __ ld (cnt_addr, O5);
85 __ cmp (O5, G4);
86 __ br (Assembler::notEqual, false, Assembler::pn, label2);
87 __ delayed()->mov (O7, G1);
88 __ retl ();
89 __ delayed()->mov (G3, O0);
90
91 slowcase_entry_pclist[count++] = __ pc();
92 __ bind (label1);
93 __ mov (O7, G1);
94
95 address slow_case_addr;
96 switch (type) {
97 case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break;
98 case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break;
99 case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break;
100 case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break;
101 case T_INT: slow_case_addr = jni_GetIntField_addr(); break;
102 default: ShouldNotReachHere();
103 }
104 __ bind (label2);
105 __ call (slow_case_addr, relocInfo::none);
106 __ delayed()->mov (G1, O7);
107
108 __ flush ();
109
110 return fast_entry;
111 }
112
113 address JNI_FastGetField::generate_fast_get_boolean_field() {
114 return generate_fast_get_int_field0(T_BOOLEAN);
115 }
116
117 address JNI_FastGetField::generate_fast_get_byte_field() {
118 return generate_fast_get_int_field0(T_BYTE);
119 }
120
121 address JNI_FastGetField::generate_fast_get_char_field() {
122 return generate_fast_get_int_field0(T_CHAR);
123 }
124
125 address JNI_FastGetField::generate_fast_get_short_field() {
126 return generate_fast_get_int_field0(T_SHORT);
127 }
128
129 address JNI_FastGetField::generate_fast_get_int_field() {
130 return generate_fast_get_int_field0(T_INT);
131 }
132
133 address JNI_FastGetField::generate_fast_get_long_field() {
134 const char *name = "jni_fast_GetLongField";
135 ResourceMark rm;
136 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE*wordSize);
137 CodeBuffer cbuf(blob);
138 MacroAssembler* masm = new MacroAssembler(&cbuf);
139 address fast_entry = __ pc();
140
141 Label label1, label2;
142
143 AddressLiteral cnt_addrlit(SafepointSynchronize::safepoint_counter_addr());
144 __ sethi (cnt_addrlit, G3);
145 Address cnt_addr(G3, cnt_addrlit.low10());
146 __ ld (cnt_addr, G4);
147 __ andcc (G4, 1, G0);
148 __ br (Assembler::notZero, false, Assembler::pn, label1);
149 __ delayed()->srl (O2, 2, O4);
150 __ ld_ptr (O1, 0, O5);
151 __ add (O5, O4, O5);
152
153 #ifndef _LP64
154 assert(count < LIST_CAPACITY-1, "LIST_CAPACITY too small");
155 speculative_load_pclist[count++] = __ pc();
156 __ ld (O5, 0, G2);
157
158 speculative_load_pclist[count] = __ pc();
159 __ ld (O5, 4, O3);
160 #else
161 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
162 speculative_load_pclist[count] = __ pc();
163 __ ldx (O5, 0, O3);
164 #endif
165
166 __ ld (cnt_addr, G1);
167 __ cmp (G1, G4);
168 __ br (Assembler::notEqual, false, Assembler::pn, label2);
169 __ delayed()->mov (O7, G1);
170
171 #ifndef _LP64
172 __ mov (G2, O0);
173 __ retl ();
174 __ delayed()->mov (O3, O1);
175 #else
176 __ retl ();
177 __ delayed()->mov (O3, O0);
178 #endif
179
180 #ifndef _LP64
181 slowcase_entry_pclist[count-1] = __ pc();
182 slowcase_entry_pclist[count++] = __ pc() ;
183 #else
184 slowcase_entry_pclist[count++] = __ pc();
185 #endif
186
187 __ bind (label1);
188 __ mov (O7, G1);
189
190 address slow_case_addr = jni_GetLongField_addr();
191 __ bind (label2);
192 __ call (slow_case_addr, relocInfo::none);
193 __ delayed()->mov (G1, O7);
194
195 __ flush ();
196
197 return fast_entry;
198 }
199
200 address JNI_FastGetField::generate_fast_get_float_field0(BasicType type) {
201 const char *name;
202 switch (type) {
203 case T_FLOAT: name = "jni_fast_GetFloatField"; break;
204 case T_DOUBLE: name = "jni_fast_GetDoubleField"; break;
205 default: ShouldNotReachHere();
206 }
207 ResourceMark rm;
208 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE*wordSize);
209 CodeBuffer cbuf(blob);
210 MacroAssembler* masm = new MacroAssembler(&cbuf);
211 address fast_entry = __ pc();
212
213 Label label1, label2;
214
215 AddressLiteral cnt_addrlit(SafepointSynchronize::safepoint_counter_addr());
216 __ sethi (cnt_addrlit, O3);
217 Address cnt_addr(O3, cnt_addrlit.low10());
218 __ ld (cnt_addr, G4);
219 __ andcc (G4, 1, G0);
220 __ br (Assembler::notZero, false, Assembler::pn, label1);
221 __ delayed()->srl (O2, 2, O4);
222 __ ld_ptr (O1, 0, O5);
223
224 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
225 speculative_load_pclist[count] = __ pc();
226 switch (type) {
227 case T_FLOAT: __ ldf (FloatRegisterImpl::S, O5, O4, F0); break;
228 case T_DOUBLE: __ ldf (FloatRegisterImpl::D, O5, O4, F0); break;
229 default: ShouldNotReachHere();
230 }
231
232 __ ld (cnt_addr, O5);
233 __ cmp (O5, G4);
234 __ br (Assembler::notEqual, false, Assembler::pn, label2);
235 __ delayed()->mov (O7, G1);
236
237 __ retl ();
238 __ delayed()-> nop ();
239
240 slowcase_entry_pclist[count++] = __ pc();
241 __ bind (label1);
242 __ mov (O7, G1);
243
244 address slow_case_addr;
245 switch (type) {
246 case T_FLOAT: slow_case_addr = jni_GetFloatField_addr(); break;
247 case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr(); break;
248 default: ShouldNotReachHere();
249 }
250 __ bind (label2);
251 __ call (slow_case_addr, relocInfo::none);
252 __ delayed()->mov (G1, O7);
253
254 __ flush ();
255
256 return fast_entry;
257 }
258
259 address JNI_FastGetField::generate_fast_get_float_field() {
260 return generate_fast_get_float_field0(T_FLOAT);
261 }
262
263 address JNI_FastGetField::generate_fast_get_double_field() {
264 return generate_fast_get_float_field0(T_DOUBLE);
265 }