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 "incls/_precompiled.incl"
26 # include "incls/_jniFastGetField_x86_32.cpp.incl"
27
28 #define __ masm->
29
30 #define BUFFER_SIZE 30
31
32 #ifdef _WINDOWS
33 GetBooleanField_t JNI_FastGetField::jni_fast_GetBooleanField_fp;
34 GetByteField_t JNI_FastGetField::jni_fast_GetByteField_fp;
35 GetCharField_t JNI_FastGetField::jni_fast_GetCharField_fp;
36 GetShortField_t JNI_FastGetField::jni_fast_GetShortField_fp;
37 GetIntField_t JNI_FastGetField::jni_fast_GetIntField_fp;
38 GetLongField_t JNI_FastGetField::jni_fast_GetLongField_fp;
39 GetFloatField_t JNI_FastGetField::jni_fast_GetFloatField_fp;
40 GetDoubleField_t JNI_FastGetField::jni_fast_GetDoubleField_fp;
41 #endif
42
43 // Instead of issuing lfence for LoadLoad barrier, we create data dependency
44 // between loads, which is much more efficient than lfence.
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 slow;
63
64 // stack layout: offset from rsp (in words):
65 // return pc 0
66 // jni env 1
67 // obj 2
68 // jfieldID 3
69
70 ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
71 __ mov32 (rcx, counter);
72 __ testb (rcx, 1);
73 __ jcc (Assembler::notZero, slow);
74 if (os::is_MP()) {
75 __ mov(rax, rcx);
76 __ andptr(rax, 1); // rax, must end up 0
77 __ movptr(rdx, Address(rsp, rax, Address::times_1, 2*wordSize));
78 // obj, notice rax, is 0.
79 // rdx is data dependent on rcx.
80 } else {
81 __ movptr (rdx, Address(rsp, 2*wordSize)); // obj
82 }
83 __ movptr(rax, Address(rsp, 3*wordSize)); // jfieldID
84 __ movptr(rdx, Address(rdx, 0)); // *obj
85 __ shrptr (rax, 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(rdx, rax, Address::times_1)); break;
91 case T_BYTE: __ movsbl (rax, Address(rdx, rax, Address::times_1)); break;
92 case T_CHAR: __ movzwl (rax, Address(rdx, rax, Address::times_1)); break;
93 case T_SHORT: __ movswl (rax, Address(rdx, rax, Address::times_1)); break;
94 case T_INT: __ movl (rax, Address(rdx, rax, Address::times_1)); break;
95 default: ShouldNotReachHere();
96 }
97
98 Address ca1;
99 if (os::is_MP()) {
100 __ lea(rdx, counter);
101 __ xorptr(rdx, rax);
102 __ xorptr(rdx, rax);
103 __ cmp32(rcx, Address(rdx, 0));
104 // ca1 is the same as ca because
105 // rax, ^ counter_addr ^ rax, = address
106 // ca1 is data dependent on rax,.
107 } else {
108 __ cmp32(rcx, counter);
109 }
110 __ jcc (Assembler::notEqual, slow);
111
112 #ifndef _WINDOWS
113 __ ret (0);
114 #else
115 // __stdcall calling convention
116 __ ret (3*wordSize);
117 #endif
118
119 slowcase_entry_pclist[count++] = __ pc();
120 __ bind (slow);
121 address slow_case_addr;
122 switch (type) {
123 case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break;
124 case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break;
125 case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break;
126 case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break;
127 case T_INT: slow_case_addr = jni_GetIntField_addr();
128 }
129 // tail call
130 __ jump (ExternalAddress(slow_case_addr));
131
132 __ flush ();
133
134 #ifndef _WINDOWS
135 return fast_entry;
136 #else
137 switch (type) {
138 case T_BOOLEAN: jni_fast_GetBooleanField_fp = (GetBooleanField_t) fast_entry; break;
139 case T_BYTE: jni_fast_GetByteField_fp = (GetByteField_t) fast_entry; break;
140 case T_CHAR: jni_fast_GetCharField_fp = (GetCharField_t) fast_entry; break;
141 case T_SHORT: jni_fast_GetShortField_fp = (GetShortField_t) fast_entry; break;
142 case T_INT: jni_fast_GetIntField_fp = (GetIntField_t) fast_entry; break;
143 }
144 return os::win32::fast_jni_accessor_wrapper(type);
145 #endif
146 }
147
148 address JNI_FastGetField::generate_fast_get_boolean_field() {
149 return generate_fast_get_int_field0(T_BOOLEAN);
150 }
151
152 address JNI_FastGetField::generate_fast_get_byte_field() {
153 return generate_fast_get_int_field0(T_BYTE);
154 }
155
156 address JNI_FastGetField::generate_fast_get_char_field() {
157 return generate_fast_get_int_field0(T_CHAR);
158 }
159
160 address JNI_FastGetField::generate_fast_get_short_field() {
161 return generate_fast_get_int_field0(T_SHORT);
162 }
163
164 address JNI_FastGetField::generate_fast_get_int_field() {
165 return generate_fast_get_int_field0(T_INT);
166 }
167
168 address JNI_FastGetField::generate_fast_get_long_field() {
169 const char *name = "jni_fast_GetLongField";
170 ResourceMark rm;
171 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE*wordSize);
172 CodeBuffer cbuf(blob);
173 MacroAssembler* masm = new MacroAssembler(&cbuf);
174 address fast_entry = __ pc();
175
176 Label slow;
177
178 // stack layout: offset from rsp (in words):
179 // old rsi 0
180 // return pc 1
181 // jni env 2
182 // obj 3
183 // jfieldID 4
184
185 ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
186
187 __ push (rsi);
188 __ mov32 (rcx, counter);
189 __ testb (rcx, 1);
190 __ jcc (Assembler::notZero, slow);
191 if (os::is_MP()) {
192 __ mov(rax, rcx);
193 __ andptr(rax, 1); // rax, must end up 0
194 __ movptr(rdx, Address(rsp, rax, Address::times_1, 3*wordSize));
195 // obj, notice rax, is 0.
196 // rdx is data dependent on rcx.
197 } else {
198 __ movptr(rdx, Address(rsp, 3*wordSize)); // obj
199 }
200 __ movptr(rsi, Address(rsp, 4*wordSize)); // jfieldID
201 __ movptr(rdx, Address(rdx, 0)); // *obj
202 __ shrptr(rsi, 2); // offset
203
204 assert(count < LIST_CAPACITY-1, "LIST_CAPACITY too small");
205 speculative_load_pclist[count++] = __ pc();
206 __ movptr(rax, Address(rdx, rsi, Address::times_1));
207 #ifndef _LP64
208 speculative_load_pclist[count] = __ pc();
209 __ movl(rdx, Address(rdx, rsi, Address::times_1, 4));
210 #endif // _LP64
211
212 if (os::is_MP()) {
213 __ lea(rsi, counter);
214 __ xorptr(rsi, rdx);
215 __ xorptr(rsi, rax);
216 __ xorptr(rsi, rdx);
217 __ xorptr(rsi, rax);
218 __ cmp32(rcx, Address(rsi, 0));
219 // ca1 is the same as ca because
220 // rax, ^ rdx ^ counter_addr ^ rax, ^ rdx = address
221 // ca1 is data dependent on both rax, and rdx.
222 } else {
223 __ cmp32(rcx, counter);
224 }
225 __ jcc (Assembler::notEqual, slow);
226
227 __ pop (rsi);
228
229 #ifndef _WINDOWS
230 __ ret (0);
231 #else
232 // __stdcall calling convention
233 __ ret (3*wordSize);
234 #endif
235
236 slowcase_entry_pclist[count-1] = __ pc();
237 slowcase_entry_pclist[count++] = __ pc();
238 __ bind (slow);
239 __ pop (rsi);
240 address slow_case_addr = jni_GetLongField_addr();;
241 // tail call
242 __ jump (ExternalAddress(slow_case_addr));
243
244 __ flush ();
245
246 #ifndef _WINDOWS
247 return fast_entry;
248 #else
249 jni_fast_GetLongField_fp = (GetLongField_t) fast_entry;
250 return os::win32::fast_jni_accessor_wrapper(T_LONG);
251 #endif
252 }
253
254 address JNI_FastGetField::generate_fast_get_float_field0(BasicType type) {
255 const char *name;
256 switch (type) {
257 case T_FLOAT: name = "jni_fast_GetFloatField"; break;
258 case T_DOUBLE: name = "jni_fast_GetDoubleField"; break;
259 default: ShouldNotReachHere();
260 }
261 ResourceMark rm;
262 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE*wordSize);
263 CodeBuffer cbuf(blob);
264 MacroAssembler* masm = new MacroAssembler(&cbuf);
265 address fast_entry = __ pc();
266
267 Label slow_with_pop, slow;
268
269 // stack layout: offset from rsp (in words):
270 // return pc 0
271 // jni env 1
272 // obj 2
273 // jfieldID 3
274
275 ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
276
277 __ mov32 (rcx, counter);
278 __ testb (rcx, 1);
279 __ jcc (Assembler::notZero, slow);
280 if (os::is_MP()) {
281 __ mov(rax, rcx);
282 __ andptr(rax, 1); // rax, must end up 0
283 __ movptr(rdx, Address(rsp, rax, Address::times_1, 2*wordSize));
284 // obj, notice rax, is 0.
285 // rdx is data dependent on rcx.
286 } else {
287 __ movptr(rdx, Address(rsp, 2*wordSize)); // obj
288 }
289 __ movptr(rax, Address(rsp, 3*wordSize)); // jfieldID
290 __ movptr(rdx, Address(rdx, 0)); // *obj
291 __ shrptr(rax, 2); // offset
292
293 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
294 speculative_load_pclist[count] = __ pc();
295 switch (type) {
296 #ifndef _LP64
297 case T_FLOAT: __ fld_s (Address(rdx, rax, Address::times_1)); break;
298 case T_DOUBLE: __ fld_d (Address(rdx, rax, Address::times_1)); break;
299 #else
300 case T_FLOAT: __ movflt (xmm0, Address(robj, roffset, Address::times_1)); break;
301 case T_DOUBLE: __ movdbl (xmm0, Address(robj, roffset, Address::times_1)); break;
302 #endif // _LP64
303 default: ShouldNotReachHere();
304 }
305
306 Address ca1;
307 if (os::is_MP()) {
308 __ fst_s (Address(rsp, -4));
309 __ lea(rdx, counter);
310 __ movl (rax, Address(rsp, -4));
311 // garbage hi-order bits on 64bit are harmless.
312 __ xorptr(rdx, rax);
313 __ xorptr(rdx, rax);
314 __ cmp32(rcx, Address(rdx, 0));
315 // rax, ^ counter_addr ^ rax, = address
316 // ca1 is data dependent on the field
317 // access.
318 } else {
319 __ cmp32(rcx, counter);
320 }
321 __ jcc (Assembler::notEqual, slow_with_pop);
322
323 #ifndef _WINDOWS
324 __ ret (0);
325 #else
326 // __stdcall calling convention
327 __ ret (3*wordSize);
328 #endif
329
330 __ bind (slow_with_pop);
331 // invalid load. pop FPU stack.
332 __ fstp_d (0);
333
334 slowcase_entry_pclist[count++] = __ pc();
335 __ bind (slow);
336 address slow_case_addr;
337 switch (type) {
338 case T_FLOAT: slow_case_addr = jni_GetFloatField_addr(); break;
339 case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr(); break;
340 default: ShouldNotReachHere();
341 }
342 // tail call
343 __ jump (ExternalAddress(slow_case_addr));
344
345 __ flush ();
346
347 #ifndef _WINDOWS
348 return fast_entry;
349 #else
350 switch (type) {
351 case T_FLOAT: jni_fast_GetFloatField_fp = (GetFloatField_t) fast_entry; break;
352 case T_DOUBLE: jni_fast_GetDoubleField_fp = (GetDoubleField_t) fast_entry; break;
353 }
354 return os::win32::fast_jni_accessor_wrapper(type);
355 #endif
356 }
357
358 address JNI_FastGetField::generate_fast_get_float_field() {
359 return generate_fast_get_float_field0(T_FLOAT);
360 }
361
362 address JNI_FastGetField::generate_fast_get_double_field() {
363 return generate_fast_get_float_field0(T_DOUBLE);
364 }