Mercurial > jdk8-mips64-public > hotspot / file revision
src/cpu/x86/vm/jniFastGetField_x86_32.cpp@437d03ea40b1
src/cpu/x86/vm/jniFastGetField_x86_32.cpp
Wed, 21 May 2008 16:31:35 -0700
- author
- kvn
- date
- Wed, 21 May 2008 16:31:35 -0700
- changeset 600
- 437d03ea40b1
- parent 435
- a61af66fc99e
- child 739
- dc7f315e41f7
- permissions
- -rw-r--r--
6703888: Compressed Oops: use the 32-bits gap after klass in a object
Summary: Use the gap also for a narrow oop field and a boxing object value.
Reviewed-by: coleenp, never
1 /*
2 * Copyright 2004-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 # include "incls/_precompiled.incl"
26 # include "incls/_jniFastGetField_x86_32.cpp.incl"
28 #define __ masm->
30 #define BUFFER_SIZE 30
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
43 // Instead of issuing lfence for LoadLoad barrier, we create data dependency
44 // between loads, which is much more efficient than lfence.
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* b = BufferBlob::create(name, BUFFER_SIZE*wordSize);
58 address fast_entry = b->instructions_begin();
59 CodeBuffer cbuf(fast_entry, b->instructions_size());
60 MacroAssembler* masm = new MacroAssembler(&cbuf);
62 Label slow;
64 // stack layout: offset from rsp (in words):
65 // return pc 0
66 // jni env 1
67 // obj 2
68 // jfieldID 3
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 __ movl (rax, rcx);
76 __ andl (rax, 1); // rax, must end up 0
77 __ movl (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 __ movl (rdx, Address(rsp, 2*wordSize)); // obj
82 }
83 __ movl (rax, Address(rsp, 3*wordSize)); // jfieldID
84 __ movl (rdx, Address(rdx, 0)); // *obj
85 __ shrl (rax, 2); // offset
87 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
88 speculative_load_pclist[count] = __ pc();
89 switch (type) {
90 case T_BOOLEAN: __ movzxb (rax, Address(rdx, rax, Address::times_1)); break;
91 case T_BYTE: __ movsxb (rax, Address(rdx, rax, Address::times_1)); break;
92 case T_CHAR: __ movzxw (rax, Address(rdx, rax, Address::times_1)); break;
93 case T_SHORT: __ movsxw (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 }
98 Address ca1;
99 if (os::is_MP()) {
100 __ lea(rdx, counter);
101 __ xorl(rdx, rax);
102 __ xorl(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);
112 #ifndef _WINDOWS
113 __ ret (0);
114 #else
115 // __stdcall calling convention
116 __ ret (3*wordSize);
117 #endif
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));
132 __ flush ();
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;
143 }
144 return os::win32::fast_jni_accessor_wrapper(type);
145 #endif
146 }
148 address JNI_FastGetField::generate_fast_get_boolean_field() {
149 return generate_fast_get_int_field0(T_BOOLEAN);
150 }
152 address JNI_FastGetField::generate_fast_get_byte_field() {
153 return generate_fast_get_int_field0(T_BYTE);
154 }
156 address JNI_FastGetField::generate_fast_get_char_field() {
157 return generate_fast_get_int_field0(T_CHAR);
158 }
160 address JNI_FastGetField::generate_fast_get_short_field() {
161 return generate_fast_get_int_field0(T_SHORT);
162 }
164 address JNI_FastGetField::generate_fast_get_int_field() {
165 return generate_fast_get_int_field0(T_INT);
166 }
168 address JNI_FastGetField::generate_fast_get_long_field() {
169 const char *name = "jni_fast_GetLongField";
170 ResourceMark rm;
171 BufferBlob* b = BufferBlob::create(name, BUFFER_SIZE*wordSize);
172 address fast_entry = b->instructions_begin();
173 CodeBuffer cbuf(fast_entry, b->instructions_size());
174 MacroAssembler* masm = new MacroAssembler(&cbuf);
176 Label slow;
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
185 ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
187 __ pushl (rsi);
188 __ mov32 (rcx, counter);
189 __ testb (rcx, 1);
190 __ jcc (Assembler::notZero, slow);
191 if (os::is_MP()) {
192 __ movl (rax, rcx);
193 __ andl (rax, 1); // rax, must end up 0
194 __ movl (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 __ movl (rdx, Address(rsp, 3*wordSize)); // obj
199 }
200 __ movl (rsi, Address(rsp, 4*wordSize)); // jfieldID
201 __ movl (rdx, Address(rdx, 0)); // *obj
202 __ shrl (rsi, 2); // offset
204 assert(count < LIST_CAPACITY-1, "LIST_CAPACITY too small");
205 speculative_load_pclist[count++] = __ pc();
206 __ movl (rax, Address(rdx, rsi, Address::times_1));
207 speculative_load_pclist[count] = __ pc();
208 __ movl (rdx, Address(rdx, rsi, Address::times_1, 4));
210 if (os::is_MP()) {
211 __ lea (rsi, counter);
212 __ xorl (rsi, rdx);
213 __ xorl (rsi, rax);
214 __ xorl (rsi, rdx);
215 __ xorl (rsi, rax);
216 __ cmp32(rcx, Address(rsi, 0));
217 // ca1 is the same as ca because
218 // rax, ^ rdx ^ counter_addr ^ rax, ^ rdx = address
219 // ca1 is data dependent on both rax, and rdx.
220 } else {
221 __ cmp32(rcx, counter);
222 }
223 __ jcc (Assembler::notEqual, slow);
225 __ popl (rsi);
227 #ifndef _WINDOWS
228 __ ret (0);
229 #else
230 // __stdcall calling convention
231 __ ret (3*wordSize);
232 #endif
234 slowcase_entry_pclist[count-1] = __ pc();
235 slowcase_entry_pclist[count++] = __ pc();
236 __ bind (slow);
237 __ popl (rsi);
238 address slow_case_addr = jni_GetLongField_addr();;
239 // tail call
240 __ jump (ExternalAddress(slow_case_addr));
242 __ flush ();
244 #ifndef _WINDOWS
245 return fast_entry;
246 #else
247 jni_fast_GetLongField_fp = (GetLongField_t)fast_entry;
248 return os::win32::fast_jni_accessor_wrapper(T_LONG);
249 #endif
250 }
252 address JNI_FastGetField::generate_fast_get_float_field0(BasicType type) {
253 const char *name;
254 switch (type) {
255 case T_FLOAT: name = "jni_fast_GetFloatField"; break;
256 case T_DOUBLE: name = "jni_fast_GetDoubleField"; break;
257 default: ShouldNotReachHere();
258 }
259 ResourceMark rm;
260 BufferBlob* b = BufferBlob::create(name, BUFFER_SIZE*wordSize);
261 address fast_entry = b->instructions_begin();
262 CodeBuffer cbuf(fast_entry, b->instructions_size());
263 MacroAssembler* masm = new MacroAssembler(&cbuf);
265 Label slow_with_pop, slow;
267 // stack layout: offset from rsp (in words):
268 // return pc 0
269 // jni env 1
270 // obj 2
271 // jfieldID 3
273 ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
275 __ mov32 (rcx, counter);
276 __ testb (rcx, 1);
277 __ jcc (Assembler::notZero, slow);
278 if (os::is_MP()) {
279 __ movl (rax, rcx);
280 __ andl (rax, 1); // rax, must end up 0
281 __ movl (rdx, Address(rsp, rax, Address::times_1, 2*wordSize));
282 // obj, notice rax, is 0.
283 // rdx is data dependent on rcx.
284 } else {
285 __ movl (rdx, Address(rsp, 2*wordSize)); // obj
286 }
287 __ movl (rax, Address(rsp, 3*wordSize)); // jfieldID
288 __ movl (rdx, Address(rdx, 0)); // *obj
289 __ shrl (rax, 2); // offset
291 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
292 speculative_load_pclist[count] = __ pc();
293 switch (type) {
294 case T_FLOAT: __ fld_s (Address(rdx, rax, Address::times_1)); break;
295 case T_DOUBLE: __ fld_d (Address(rdx, rax, Address::times_1)); break;
296 default: ShouldNotReachHere();
297 }
299 Address ca1;
300 if (os::is_MP()) {
301 __ fst_s (Address(rsp, -4));
302 __ lea(rdx, counter);
303 __ movl (rax, Address(rsp, -4));
304 __ xorl(rdx, rax);
305 __ xorl(rdx, rax);
306 __ cmp32(rcx, Address(rdx, 0));
307 // rax, ^ counter_addr ^ rax, = address
308 // ca1 is data dependent on the field
309 // access.
310 } else {
311 __ cmp32(rcx, counter);
312 }
313 __ jcc (Assembler::notEqual, slow_with_pop);
315 #ifndef _WINDOWS
316 __ ret (0);
317 #else
318 // __stdcall calling convention
319 __ ret (3*wordSize);
320 #endif
322 __ bind (slow_with_pop);
323 // invalid load. pop FPU stack.
324 __ fstp_d (0);
326 slowcase_entry_pclist[count++] = __ pc();
327 __ bind (slow);
328 address slow_case_addr;
329 switch (type) {
330 case T_FLOAT: slow_case_addr = jni_GetFloatField_addr(); break;
331 case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr(); break;
332 default: ShouldNotReachHere();
333 }
334 // tail call
335 __ jump (ExternalAddress(slow_case_addr));
337 __ flush ();
339 #ifndef _WINDOWS
340 return fast_entry;
341 #else
342 switch (type) {
343 case T_FLOAT: jni_fast_GetFloatField_fp = (GetFloatField_t)fast_entry; break;
344 case T_DOUBLE: jni_fast_GetDoubleField_fp = (GetDoubleField_t)fast_entry;
345 }
346 return os::win32::fast_jni_accessor_wrapper(type);
347 #endif
348 }
350 address JNI_FastGetField::generate_fast_get_float_field() {
351 return generate_fast_get_float_field0(T_FLOAT);
352 }
354 address JNI_FastGetField::generate_fast_get_double_field() {
355 return generate_fast_get_float_field0(T_DOUBLE);
356 }
