34 #define BUFFER_SIZE 30*wordSize
35
36 // Instead of issuing lfence for LoadLoad barrier, we create data dependency
37 // between loads, which is more efficient than lfence.
38
39 // Common register usage:
40 // rax/xmm0: result
41 // c_rarg0: jni env
42 // c_rarg1: obj
43 // c_rarg2: jfield id
44
45 static const Register robj = r9;
46 static const Register rcounter = r10;
47 static const Register roffset = r11;
48 static const Register rcounter_addr = r11;
49
50 // Warning: do not use rip relative addressing after the first counter load
51 // since that may scratch r10!
52
53 address JNI_FastGetField::generate_fast_get_int_field0(BasicType type) {
54 const char *name;
55 switch (type) {
56 case T_BOOLEAN: name = "jni_fast_GetBooleanField"; break;
57 case T_BYTE: name = "jni_fast_GetByteField"; break;
58 case T_CHAR: name = "jni_fast_GetCharField"; break;
59 case T_SHORT: name = "jni_fast_GetShortField"; break;
60 case T_INT: name = "jni_fast_GetIntField"; break;
61 case T_LONG: name = "jni_fast_GetLongField"; break;
62 default: ShouldNotReachHere();
63 }
64 ResourceMark rm;
65 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE);
66 CodeBuffer cbuf(blob);
67 MacroAssembler* masm = new MacroAssembler(&cbuf);
68 address fast_entry = __ pc();
69
70 Label slow;
71
72 ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
73 __ mov32 (rcounter, counter);
74 __ mov (robj, c_rarg1);
94 case T_INT: __ movl (rax, Address(robj, roffset, Address::times_1)); break;
95 case T_LONG: __ movq (rax, Address(robj, roffset, Address::times_1)); break;
96 default: ShouldNotReachHere();
97 }
98
99 if (os::is_MP()) {
100 __ lea(rcounter_addr, counter);
101 // ca is data dependent on rax.
102 __ xorptr(rcounter_addr, rax);
103 __ xorptr(rcounter_addr, rax);
104 __ cmpl (rcounter, Address(rcounter_addr, 0));
105 } else {
106 __ cmp32 (rcounter, counter);
107 }
108 __ jcc (Assembler::notEqual, slow);
109
110 __ ret (0);
111
112 slowcase_entry_pclist[count++] = __ pc();
113 __ bind (slow);
114 address slow_case_addr;
115 switch (type) {
116 case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break;
117 case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break;
118 case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break;
119 case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break;
120 case T_INT: slow_case_addr = jni_GetIntField_addr(); break;
121 case T_LONG: slow_case_addr = jni_GetLongField_addr();
122 }
123 // tail call
124 __ jump (ExternalAddress(slow_case_addr));
125
126 __ flush ();
127
128 return fast_entry;
129 }
130
131 address JNI_FastGetField::generate_fast_get_boolean_field() {
132 return generate_fast_get_int_field0(T_BOOLEAN);
133 }
134
136 return generate_fast_get_int_field0(T_BYTE);
137 }
138
139 address JNI_FastGetField::generate_fast_get_char_field() {
140 return generate_fast_get_int_field0(T_CHAR);
141 }
142
143 address JNI_FastGetField::generate_fast_get_short_field() {
144 return generate_fast_get_int_field0(T_SHORT);
145 }
146
147 address JNI_FastGetField::generate_fast_get_int_field() {
148 return generate_fast_get_int_field0(T_INT);
149 }
150
151 address JNI_FastGetField::generate_fast_get_long_field() {
152 return generate_fast_get_int_field0(T_LONG);
153 }
154
155 address JNI_FastGetField::generate_fast_get_float_field0(BasicType type) {
156 const char *name;
157 switch (type) {
158 case T_FLOAT: name = "jni_fast_GetFloatField"; break;
159 case T_DOUBLE: name = "jni_fast_GetDoubleField"; break;
160 default: ShouldNotReachHere();
161 }
162 ResourceMark rm;
163 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE);
164 CodeBuffer cbuf(blob);
165 MacroAssembler* masm = new MacroAssembler(&cbuf);
166 address fast_entry = __ pc();
167
168 Label slow;
169
170 ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
171 __ mov32 (rcounter, counter);
172 __ mov (robj, c_rarg1);
173 __ testb (rcounter, 1);
174 __ jcc (Assembler::notZero, slow);
175 if (os::is_MP()) {
176 __ xorptr(robj, rcounter);
189 case T_DOUBLE: __ movdbl (xmm0, Address(robj, roffset, Address::times_1)); break;
190 default: ShouldNotReachHere();
191 }
192
193 if (os::is_MP()) {
194 __ lea(rcounter_addr, counter);
195 __ movdq (rax, xmm0);
196 // counter address is data dependent on xmm0.
197 __ xorptr(rcounter_addr, rax);
198 __ xorptr(rcounter_addr, rax);
199 __ cmpl (rcounter, Address(rcounter_addr, 0));
200 } else {
201 __ cmp32 (rcounter, counter);
202 }
203 __ jcc (Assembler::notEqual, slow);
204
205 __ ret (0);
206
207 slowcase_entry_pclist[count++] = __ pc();
208 __ bind (slow);
209 address slow_case_addr;
210 switch (type) {
211 case T_FLOAT: slow_case_addr = jni_GetFloatField_addr(); break;
212 case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr();
213 }
214 // tail call
215 __ jump (ExternalAddress(slow_case_addr));
216
217 __ flush ();
218
219 return fast_entry;
220 }
221
222 address JNI_FastGetField::generate_fast_get_float_field() {
223 return generate_fast_get_float_field0(T_FLOAT);
224 }
225
226 address JNI_FastGetField::generate_fast_get_double_field() {
227 return generate_fast_get_float_field0(T_DOUBLE);
228 }
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34 #define BUFFER_SIZE 30*wordSize
35
36 // Instead of issuing lfence for LoadLoad barrier, we create data dependency
37 // between loads, which is more efficient than lfence.
38
39 // Common register usage:
40 // rax/xmm0: result
41 // c_rarg0: jni env
42 // c_rarg1: obj
43 // c_rarg2: jfield id
44
45 static const Register robj = r9;
46 static const Register rcounter = r10;
47 static const Register roffset = r11;
48 static const Register rcounter_addr = r11;
49
50 // Warning: do not use rip relative addressing after the first counter load
51 // since that may scratch r10!
52
53 address JNI_FastGetField::generate_fast_get_int_field0(BasicType type) {
54 const char *name = NULL;
55 switch (type) {
56 case T_BOOLEAN: name = "jni_fast_GetBooleanField"; break;
57 case T_BYTE: name = "jni_fast_GetByteField"; break;
58 case T_CHAR: name = "jni_fast_GetCharField"; break;
59 case T_SHORT: name = "jni_fast_GetShortField"; break;
60 case T_INT: name = "jni_fast_GetIntField"; break;
61 case T_LONG: name = "jni_fast_GetLongField"; break;
62 default: ShouldNotReachHere();
63 }
64 ResourceMark rm;
65 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE);
66 CodeBuffer cbuf(blob);
67 MacroAssembler* masm = new MacroAssembler(&cbuf);
68 address fast_entry = __ pc();
69
70 Label slow;
71
72 ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
73 __ mov32 (rcounter, counter);
74 __ mov (robj, c_rarg1);
94 case T_INT: __ movl (rax, Address(robj, roffset, Address::times_1)); break;
95 case T_LONG: __ movq (rax, Address(robj, roffset, Address::times_1)); break;
96 default: ShouldNotReachHere();
97 }
98
99 if (os::is_MP()) {
100 __ lea(rcounter_addr, counter);
101 // ca is data dependent on rax.
102 __ xorptr(rcounter_addr, rax);
103 __ xorptr(rcounter_addr, rax);
104 __ cmpl (rcounter, Address(rcounter_addr, 0));
105 } else {
106 __ cmp32 (rcounter, counter);
107 }
108 __ jcc (Assembler::notEqual, slow);
109
110 __ ret (0);
111
112 slowcase_entry_pclist[count++] = __ pc();
113 __ bind (slow);
114 address slow_case_addr = NULL;
115 switch (type) {
116 case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break;
117 case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break;
118 case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break;
119 case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break;
120 case T_INT: slow_case_addr = jni_GetIntField_addr(); break;
121 case T_LONG: slow_case_addr = jni_GetLongField_addr();
122 }
123 // tail call
124 __ jump (ExternalAddress(slow_case_addr));
125
126 __ flush ();
127
128 return fast_entry;
129 }
130
131 address JNI_FastGetField::generate_fast_get_boolean_field() {
132 return generate_fast_get_int_field0(T_BOOLEAN);
133 }
134
136 return generate_fast_get_int_field0(T_BYTE);
137 }
138
139 address JNI_FastGetField::generate_fast_get_char_field() {
140 return generate_fast_get_int_field0(T_CHAR);
141 }
142
143 address JNI_FastGetField::generate_fast_get_short_field() {
144 return generate_fast_get_int_field0(T_SHORT);
145 }
146
147 address JNI_FastGetField::generate_fast_get_int_field() {
148 return generate_fast_get_int_field0(T_INT);
149 }
150
151 address JNI_FastGetField::generate_fast_get_long_field() {
152 return generate_fast_get_int_field0(T_LONG);
153 }
154
155 address JNI_FastGetField::generate_fast_get_float_field0(BasicType type) {
156 const char *name = NULL;
157 switch (type) {
158 case T_FLOAT: name = "jni_fast_GetFloatField"; break;
159 case T_DOUBLE: name = "jni_fast_GetDoubleField"; break;
160 default: ShouldNotReachHere();
161 }
162 ResourceMark rm;
163 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE);
164 CodeBuffer cbuf(blob);
165 MacroAssembler* masm = new MacroAssembler(&cbuf);
166 address fast_entry = __ pc();
167
168 Label slow;
169
170 ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
171 __ mov32 (rcounter, counter);
172 __ mov (robj, c_rarg1);
173 __ testb (rcounter, 1);
174 __ jcc (Assembler::notZero, slow);
175 if (os::is_MP()) {
176 __ xorptr(robj, rcounter);
189 case T_DOUBLE: __ movdbl (xmm0, Address(robj, roffset, Address::times_1)); break;
190 default: ShouldNotReachHere();
191 }
192
193 if (os::is_MP()) {
194 __ lea(rcounter_addr, counter);
195 __ movdq (rax, xmm0);
196 // counter address is data dependent on xmm0.
197 __ xorptr(rcounter_addr, rax);
198 __ xorptr(rcounter_addr, rax);
199 __ cmpl (rcounter, Address(rcounter_addr, 0));
200 } else {
201 __ cmp32 (rcounter, counter);
202 }
203 __ jcc (Assembler::notEqual, slow);
204
205 __ ret (0);
206
207 slowcase_entry_pclist[count++] = __ pc();
208 __ bind (slow);
209 address slow_case_addr = NULL;
210 switch (type) {
211 case T_FLOAT: slow_case_addr = jni_GetFloatField_addr(); break;
212 case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr();
213 }
214 // tail call
215 __ jump (ExternalAddress(slow_case_addr));
216
217 __ flush ();
218
219 return fast_entry;
220 }
221
222 address JNI_FastGetField::generate_fast_get_float_field() {
223 return generate_fast_get_float_field0(T_FLOAT);
224 }
225
226 address JNI_FastGetField::generate_fast_get_double_field() {
227 return generate_fast_get_float_field0(T_DOUBLE);
228 }
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