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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #include "vm/globals.h" | 5 #include "vm/globals.h" |
6 #if defined(TARGET_ARCH_MIPS) | 6 #if defined(TARGET_ARCH_MIPS) |
7 | 7 |
8 #include "vm/assembler.h" | 8 #include "vm/assembler.h" |
9 #include "vm/code_generator.h" | 9 #include "vm/code_generator.h" |
10 #include "vm/compiler.h" | 10 #include "vm/compiler.h" |
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1294 // The generated code is different if the class is parameterized. | 1294 // The generated code is different if the class is parameterized. |
1295 const bool is_cls_parameterized = cls.NumTypeArguments() > 0; | 1295 const bool is_cls_parameterized = cls.NumTypeArguments() > 0; |
1296 ASSERT(!is_cls_parameterized || | 1296 ASSERT(!is_cls_parameterized || |
1297 (cls.type_arguments_field_offset() != Class::kNoTypeArguments)); | 1297 (cls.type_arguments_field_offset() != Class::kNoTypeArguments)); |
1298 // kInlineInstanceSize is a constant used as a threshold for determining | 1298 // kInlineInstanceSize is a constant used as a threshold for determining |
1299 // when the object initialization should be done as a loop or as | 1299 // when the object initialization should be done as a loop or as |
1300 // straight line code. | 1300 // straight line code. |
1301 const int kInlineInstanceSize = 12; | 1301 const int kInlineInstanceSize = 12; |
1302 const intptr_t instance_size = cls.instance_size(); | 1302 const intptr_t instance_size = cls.instance_size(); |
1303 ASSERT(instance_size > 0); | 1303 ASSERT(instance_size > 0); |
1304 Label slow_case_with_type_arguments; | 1304 if (is_cls_parameterized) { |
| 1305 __ lw(T1, Address(SP, 0 * kWordSize)); |
| 1306 // T1: type arguments. |
| 1307 } |
1305 if (FLAG_inline_alloc && Heap::IsAllocatableInNewSpace(instance_size)) { | 1308 if (FLAG_inline_alloc && Heap::IsAllocatableInNewSpace(instance_size)) { |
1306 Label slow_case_reload_type_arguments; | 1309 Label slow_case; |
1307 if (is_cls_parameterized) { | |
1308 __ lw(T1, Address(SP, 0 * kWordSize)); | |
1309 // T1: type arguments. | |
1310 } | |
1311 // Allocate the object and update top to point to | 1310 // Allocate the object and update top to point to |
1312 // next object start and initialize the allocated object. | 1311 // next object start and initialize the allocated object. |
1313 // T1: instantiated type arguments (if is_cls_parameterized). | 1312 // T1: instantiated type arguments (if is_cls_parameterized). |
1314 Heap* heap = Isolate::Current()->heap(); | 1313 Heap* heap = Isolate::Current()->heap(); |
1315 __ LoadImmediate(T5, heap->TopAddress()); | 1314 __ LoadImmediate(T5, heap->TopAddress()); |
1316 __ lw(T2, Address(T5)); | 1315 __ lw(T2, Address(T5)); |
1317 __ LoadImmediate(T4, instance_size); | 1316 __ LoadImmediate(T4, instance_size); |
1318 __ addu(T3, T2, T4); | 1317 __ addu(T3, T2, T4); |
1319 // Check if the allocation fits into the remaining space. | 1318 // Check if the allocation fits into the remaining space. |
1320 // T2: potential new object start. | 1319 // T2: potential new object start. |
1321 // T3: potential next object start. | 1320 // T3: potential next object start. |
1322 __ LoadImmediate(TMP, heap->EndAddress()); | 1321 __ LoadImmediate(TMP, heap->EndAddress()); |
1323 __ lw(CMPRES1, Address(TMP)); | 1322 __ lw(CMPRES1, Address(TMP)); |
1324 if (FLAG_use_slow_path) { | 1323 if (FLAG_use_slow_path) { |
1325 __ b(&slow_case_with_type_arguments); | 1324 __ b(&slow_case); |
1326 } else { | 1325 } else { |
1327 __ BranchUnsignedGreaterEqual(T3, CMPRES1, | 1326 __ BranchUnsignedGreaterEqual(T3, CMPRES1, &slow_case); |
1328 &slow_case_with_type_arguments); | |
1329 } | 1327 } |
1330 // Successfully allocated the object(s), now update top to point to | 1328 // Successfully allocated the object(s), now update top to point to |
1331 // next object start and initialize the object. | 1329 // next object start and initialize the object. |
1332 __ sw(T3, Address(T5)); | 1330 __ sw(T3, Address(T5)); |
1333 __ UpdateAllocationStats(cls.id(), T5); | 1331 __ UpdateAllocationStats(cls.id(), T5); |
1334 | 1332 |
1335 // T2: new object start. | 1333 // T2: new object start. |
1336 // T3: next object start. | 1334 // T3: next object start. |
1337 // T1: new object type arguments (if is_cls_parameterized). | 1335 // T1: new object type arguments (if is_cls_parameterized). |
1338 // Set the tags. | 1336 // Set the tags. |
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1376 if (is_cls_parameterized) { | 1374 if (is_cls_parameterized) { |
1377 // T1: new object type arguments. | 1375 // T1: new object type arguments. |
1378 // Set the type arguments in the new object. | 1376 // Set the type arguments in the new object. |
1379 __ sw(T1, Address(T2, cls.type_arguments_field_offset())); | 1377 __ sw(T1, Address(T2, cls.type_arguments_field_offset())); |
1380 } | 1378 } |
1381 // Done allocating and initializing the instance. | 1379 // Done allocating and initializing the instance. |
1382 // T2: new object still missing its heap tag. | 1380 // T2: new object still missing its heap tag. |
1383 __ Ret(); | 1381 __ Ret(); |
1384 __ delay_slot()->addiu(V0, T2, Immediate(kHeapObjectTag)); | 1382 __ delay_slot()->addiu(V0, T2, Immediate(kHeapObjectTag)); |
1385 | 1383 |
1386 __ Bind(&slow_case_reload_type_arguments); | 1384 __ Bind(&slow_case); |
1387 } | 1385 } |
1388 if (is_cls_parameterized) { | |
1389 __ lw(T1, Address(SP, 0 * kWordSize)); | |
1390 } | |
1391 __ Bind(&slow_case_with_type_arguments); | |
1392 // If is_cls_parameterized: | 1386 // If is_cls_parameterized: |
1393 // T1: new object type arguments (instantiated or not). | 1387 // T1: new object type arguments (instantiated or not). |
1394 // Create a stub frame as we are pushing some objects on the stack before | 1388 // Create a stub frame as we are pushing some objects on the stack before |
1395 // calling into the runtime. | 1389 // calling into the runtime. |
1396 __ EnterStubFrame(true); // Uses pool pointer to pass cls to runtime. | 1390 __ EnterStubFrame(true); // Uses pool pointer to pass cls to runtime. |
1397 __ LoadObject(TMP, cls); | 1391 __ LoadObject(TMP, cls); |
1398 | 1392 |
1399 __ addiu(SP, SP, Immediate(-4 * kWordSize)); | 1393 __ addiu(SP, SP, Immediate(-4 * kWordSize)); |
1400 // Space on stack for return value. | 1394 // Space on stack for return value. |
1401 __ LoadImmediate(T7, reinterpret_cast<intptr_t>(Object::null())); | 1395 __ LoadImmediate(T7, reinterpret_cast<intptr_t>(Object::null())); |
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2388 const Register right = T0; | 2382 const Register right = T0; |
2389 __ lw(left, Address(SP, 1 * kWordSize)); | 2383 __ lw(left, Address(SP, 1 * kWordSize)); |
2390 __ lw(right, Address(SP, 0 * kWordSize)); | 2384 __ lw(right, Address(SP, 0 * kWordSize)); |
2391 GenerateIdenticalWithNumberCheckStub(assembler, left, right, temp1, temp2); | 2385 GenerateIdenticalWithNumberCheckStub(assembler, left, right, temp1, temp2); |
2392 __ Ret(); | 2386 __ Ret(); |
2393 } | 2387 } |
2394 | 2388 |
2395 } // namespace dart | 2389 } // namespace dart |
2396 | 2390 |
2397 #endif // defined TARGET_ARCH_MIPS | 2391 #endif // defined TARGET_ARCH_MIPS |
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