144 cmpxchgptr(disp_hdr, hdr, rscratch1, rscratch2, done, &slow_case);
145 } else {
146 cmpxchgptr(disp_hdr, hdr, obj, rscratch2, done, &slow_case);
147 }
148 // done
149 bind(done);
150 }
151
152
153 // Defines obj, preserves var_size_in_bytes
154 void C1_MacroAssembler::try_allocate(Register obj, Register var_size_in_bytes, int con_size_in_bytes, Register t1, Register t2, Label& slow_case) {
155 if (UseTLAB) {
156 tlab_allocate(obj, var_size_in_bytes, con_size_in_bytes, t1, t2, slow_case);
157 } else {
158 eden_allocate(obj, var_size_in_bytes, con_size_in_bytes, t1, slow_case);
159 }
160 }
161
162 void C1_MacroAssembler::initialize_header(Register obj, Register klass, Register len, Register t1, Register t2) {
163 assert_different_registers(obj, klass, len);
164 // This assumes that all prototype bits fit in an int32_t
165 mov(t1, (int32_t)(intptr_t)markWord::prototype().value());
166 str(t1, Address(obj, oopDesc::mark_offset_in_bytes()));
167
168 if (UseCompressedClassPointers) { // Take care not to kill klass
169 encode_klass_not_null(t1, klass);
170 strw(t1, Address(obj, oopDesc::klass_offset_in_bytes()));
171 } else {
172 str(klass, Address(obj, oopDesc::klass_offset_in_bytes()));
173 }
174
175 if (len->is_valid()) {
176 strw(len, Address(obj, arrayOopDesc::length_offset_in_bytes()));
177 } else if (UseCompressedClassPointers) {
178 store_klass_gap(obj, zr);
179 }
180 }
181
182 // preserves obj, destroys len_in_bytes
183 //
184 // Scratch registers: t1 = r10, t2 = r11
185 //
186 void C1_MacroAssembler::initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register t1, Register t2) {
187 assert(hdr_size_in_bytes >= 0, "header size must be positive or 0");
188 assert(t1 == r10 && t2 == r11, "must be");
189
190 Label done;
191
192 // len_in_bytes is positive and ptr sized
193 subs(len_in_bytes, len_in_bytes, hdr_size_in_bytes);
194 br(Assembler::EQ, done);
195
196 // zero_words() takes ptr in r10 and count in words in r11
197 mov(rscratch1, len_in_bytes);
198 lea(t1, Address(obj, hdr_size_in_bytes));
199 lsr(t2, rscratch1, LogBytesPerWord);
200 zero_words(t1, t2);
201
202 bind(done);
203 }
204
205
206 void C1_MacroAssembler::allocate_object(Register obj, Register t1, Register t2, int header_size, int object_size, Register klass, Label& slow_case) {
207 assert_different_registers(obj, t1, t2); // XXX really?
208 assert(header_size >= 0 && object_size >= header_size, "illegal sizes");
209
210 try_allocate(obj, noreg, object_size * BytesPerWord, t1, t2, slow_case);
211
212 initialize_object(obj, klass, noreg, object_size * HeapWordSize, t1, t2, UseTLAB);
213 }
214
215 // Scratch registers: t1 = r10, t2 = r11
225 const Register index = t2;
226 if (var_size_in_bytes != noreg) {
227 mov(index, var_size_in_bytes);
228 initialize_body(obj, index, hdr_size_in_bytes, t1, t2);
229 } else if (con_size_in_bytes > hdr_size_in_bytes) {
230 con_size_in_bytes -= hdr_size_in_bytes;
231 lea(t1, Address(obj, hdr_size_in_bytes));
232 zero_words(t1, con_size_in_bytes / BytesPerWord);
233 }
234 }
235
236 membar(StoreStore);
237
238 if (CURRENT_ENV->dtrace_alloc_probes()) {
239 assert(obj == r0, "must be");
240 far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::dtrace_object_alloc_id)));
241 }
242
243 verify_oop(obj);
244 }
245 void C1_MacroAssembler::allocate_array(Register obj, Register len, Register t1, Register t2, int header_size, int f, Register klass, Label& slow_case) {
246 assert_different_registers(obj, len, t1, t2, klass);
247
248 // determine alignment mask
249 assert(!(BytesPerWord & 1), "must be a multiple of 2 for masking code to work");
250
251 // check for negative or excessive length
252 mov(rscratch1, (int32_t)max_array_allocation_length);
253 cmp(len, rscratch1);
254 br(Assembler::HS, slow_case);
255
256 const Register arr_size = t2; // okay to be the same
257 // align object end
258 mov(arr_size, (int32_t)header_size * BytesPerWord + MinObjAlignmentInBytesMask);
259 add(arr_size, arr_size, len, ext::uxtw, f);
260 andr(arr_size, arr_size, ~MinObjAlignmentInBytesMask);
261
262 try_allocate(obj, arr_size, 0, t1, t2, slow_case);
263
264 initialize_header(obj, klass, len, t1, t2);
265
266 // clear rest of allocated space
267 initialize_body(obj, arr_size, header_size * BytesPerWord, t1, t2);
268
269 membar(StoreStore);
270
271 if (CURRENT_ENV->dtrace_alloc_probes()) {
272 assert(obj == r0, "must be");
273 far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::dtrace_object_alloc_id)));
274 }
275
276 verify_oop(obj);
277 }
278
279
280 void C1_MacroAssembler::inline_cache_check(Register receiver, Register iCache) {
281 verify_oop(receiver);
282 // explicit NULL check not needed since load from [klass_offset] causes a trap
283 // check against inline cache
284 assert(!MacroAssembler::needs_explicit_null_check(oopDesc::klass_offset_in_bytes()), "must add explicit null check");
285
286 cmp_klass(receiver, iCache, rscratch1);
287 }
288
289
290 void C1_MacroAssembler::build_frame(int framesize, int bang_size_in_bytes) {
291 assert(bang_size_in_bytes >= framesize, "stack bang size incorrect");
292 // Make sure there is enough stack space for this method's activation.
293 // Note that we do this before creating a frame.
294 generate_stack_overflow_check(bang_size_in_bytes);
295 MacroAssembler::build_frame(framesize);
296
297 // Insert nmethod entry barrier into frame.
298 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
299 bs->nmethod_entry_barrier(this);
300 }
301
302 void C1_MacroAssembler::remove_frame(int framesize) {
303 MacroAssembler::remove_frame(framesize);
304 }
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144 cmpxchgptr(disp_hdr, hdr, rscratch1, rscratch2, done, &slow_case);
145 } else {
146 cmpxchgptr(disp_hdr, hdr, obj, rscratch2, done, &slow_case);
147 }
148 // done
149 bind(done);
150 }
151
152
153 // Defines obj, preserves var_size_in_bytes
154 void C1_MacroAssembler::try_allocate(Register obj, Register var_size_in_bytes, int con_size_in_bytes, Register t1, Register t2, Label& slow_case) {
155 if (UseTLAB) {
156 tlab_allocate(obj, var_size_in_bytes, con_size_in_bytes, t1, t2, slow_case);
157 } else {
158 eden_allocate(obj, var_size_in_bytes, con_size_in_bytes, t1, slow_case);
159 }
160 }
161
162 void C1_MacroAssembler::initialize_header(Register obj, Register klass, Register len, Register t1, Register t2) {
163 assert_different_registers(obj, klass, len);
164 ldr(t1, Address(klass, Klass::prototype_header_offset()));
165 str(t1, Address(obj, oopDesc::mark_offset_in_bytes()));
166
167 if (len->is_valid()) {
168 strw(len, Address(obj, arrayOopDesc::length_offset_in_bytes()));
169 }
170 }
171
172 // preserves obj, destroys len_in_bytes
173 //
174 // Scratch registers: t1 = r10, t2 = r11
175 //
176 void C1_MacroAssembler::initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register t1, Register t2) {
177 assert(hdr_size_in_bytes >= 0, "header size must be positive or 0");
178 assert(t1 == r10 && t2 == r11, "must be");
179
180 Label done;
181
182 // len_in_bytes is positive and ptr sized
183 subs(len_in_bytes, len_in_bytes, hdr_size_in_bytes);
184 br(Assembler::EQ, done);
185
186 // Zero first 4 bytes, if start offset is not word aligned.
187 if (!is_aligned(hdr_size_in_bytes, BytesPerWord)) {
188 strw(zr, Address(obj, hdr_size_in_bytes));
189 hdr_size_in_bytes += BytesPerInt;
190 }
191
192 // zero_words() takes ptr in r10 and count in words in r11
193 mov(rscratch1, len_in_bytes);
194 lea(t1, Address(obj, hdr_size_in_bytes));
195 lsr(t2, rscratch1, LogBytesPerWord);
196 zero_words(t1, t2);
197
198 bind(done);
199 }
200
201
202 void C1_MacroAssembler::allocate_object(Register obj, Register t1, Register t2, int header_size, int object_size, Register klass, Label& slow_case) {
203 assert_different_registers(obj, t1, t2); // XXX really?
204 assert(header_size >= 0 && object_size >= header_size, "illegal sizes");
205
206 try_allocate(obj, noreg, object_size * BytesPerWord, t1, t2, slow_case);
207
208 initialize_object(obj, klass, noreg, object_size * HeapWordSize, t1, t2, UseTLAB);
209 }
210
211 // Scratch registers: t1 = r10, t2 = r11
221 const Register index = t2;
222 if (var_size_in_bytes != noreg) {
223 mov(index, var_size_in_bytes);
224 initialize_body(obj, index, hdr_size_in_bytes, t1, t2);
225 } else if (con_size_in_bytes > hdr_size_in_bytes) {
226 con_size_in_bytes -= hdr_size_in_bytes;
227 lea(t1, Address(obj, hdr_size_in_bytes));
228 zero_words(t1, con_size_in_bytes / BytesPerWord);
229 }
230 }
231
232 membar(StoreStore);
233
234 if (CURRENT_ENV->dtrace_alloc_probes()) {
235 assert(obj == r0, "must be");
236 far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::dtrace_object_alloc_id)));
237 }
238
239 verify_oop(obj);
240 }
241 void C1_MacroAssembler::allocate_array(Register obj, Register len, Register t1, Register t2, int base_offset_in_bytes, int f, Register klass, Label& slow_case) {
242 assert_different_registers(obj, len, t1, t2, klass);
243
244 // determine alignment mask
245 assert(!(BytesPerWord & 1), "must be a multiple of 2 for masking code to work");
246
247 // check for negative or excessive length
248 mov(rscratch1, (int32_t)max_array_allocation_length);
249 cmp(len, rscratch1);
250 br(Assembler::HS, slow_case);
251
252 const Register arr_size = t2; // okay to be the same
253 // align object end
254 mov(arr_size, (int32_t)base_offset_in_bytes + MinObjAlignmentInBytesMask);
255 add(arr_size, arr_size, len, ext::uxtw, f);
256 andr(arr_size, arr_size, ~MinObjAlignmentInBytesMask);
257
258 try_allocate(obj, arr_size, 0, t1, t2, slow_case);
259
260 initialize_header(obj, klass, len, t1, t2);
261
262 // clear rest of allocated space
263 initialize_body(obj, arr_size, base_offset_in_bytes, t1, t2);
264
265 membar(StoreStore);
266
267 if (CURRENT_ENV->dtrace_alloc_probes()) {
268 assert(obj == r0, "must be");
269 far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::dtrace_object_alloc_id)));
270 }
271
272 verify_oop(obj);
273 }
274
275
276 void C1_MacroAssembler::inline_cache_check(Register receiver, Register iCache) {
277 verify_oop(receiver);
278 // explicit NULL check not needed since load from [klass_offset] causes a trap
279 // check against inline cache
280 assert(!MacroAssembler::needs_explicit_null_check(oopDesc::mark_offset_in_bytes()), "must add explicit null check");
281
282 cmp_klass(receiver, iCache, rscratch1);
283 }
284
285
286 void C1_MacroAssembler::build_frame(int framesize, int bang_size_in_bytes) {
287 assert(bang_size_in_bytes >= framesize, "stack bang size incorrect");
288 // Make sure there is enough stack space for this method's activation.
289 // Note that we do this before creating a frame.
290 generate_stack_overflow_check(bang_size_in_bytes);
291 MacroAssembler::build_frame(framesize);
292
293 // Insert nmethod entry barrier into frame.
294 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
295 bs->nmethod_entry_barrier(this);
296 }
297
298 void C1_MacroAssembler::remove_frame(int framesize) {
299 MacroAssembler::remove_frame(framesize);
300 }
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