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Issue 2912863006: Inline instance object hash code into object header on 64 bit. (Closed)
Patch Set: Add assembler tests and other feedback from Ryan Created 3 years, 6 months ago
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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" // NOLINT 5 #include "vm/globals.h" // NOLINT
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/longjump.h" 9 #include "vm/longjump.h"
10 #include "vm/runtime_entry.h" 10 #include "vm/runtime_entry.h"
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992 // Fail if heap end unsigned less than or equal to instance_reg. 992 // Fail if heap end unsigned less than or equal to instance_reg.
993 BranchUnsignedLessEqual(TMP, instance_reg, failure); 993 BranchUnsignedLessEqual(TMP, instance_reg, failure);
994 994
995 // Successfully allocated the object, now update top to point to 995 // Successfully allocated the object, now update top to point to
996 // next object start and store the class in the class field of object. 996 // next object start and store the class in the class field of object.
997 sw(instance_reg, Address(temp_reg, Heap::TopOffset(space))); 997 sw(instance_reg, Address(temp_reg, Heap::TopOffset(space)));
998 998
999 ASSERT(instance_size >= kHeapObjectTag); 999 ASSERT(instance_size >= kHeapObjectTag);
1000 AddImmediate(instance_reg, -instance_size + kHeapObjectTag); 1000 AddImmediate(instance_reg, -instance_size + kHeapObjectTag);
1001 NOT_IN_PRODUCT(UpdateAllocationStats(cls.id(), temp_reg, space)); 1001 NOT_IN_PRODUCT(UpdateAllocationStats(cls.id(), temp_reg, space));
1002 uword tags = 0; 1002 uint32_t tags = 0;
1003 tags = RawObject::SizeTag::update(instance_size, tags); 1003 tags = RawObject::SizeTag::update(instance_size, tags);
1004 ASSERT(cls.id() != kIllegalCid); 1004 ASSERT(cls.id() != kIllegalCid);
1005 tags = RawObject::ClassIdTag::update(cls.id(), tags); 1005 tags = RawObject::ClassIdTag::update(cls.id(), tags);
1006 LoadImmediate(TMP, tags); 1006 LoadImmediate(TMP, tags);
1007 sw(TMP, FieldAddress(instance_reg, Object::tags_offset())); 1007 sw(TMP, FieldAddress(instance_reg, Object::tags_offset()));
1008 } else { 1008 } else {
1009 b(failure); 1009 b(failure);
1010 } 1010 }
1011 } 1011 }
1012 1012
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1042 1042
1043 // Successfully allocated the object(s), now update top to point to 1043 // Successfully allocated the object(s), now update top to point to
1044 // next object start and initialize the object. 1044 // next object start and initialize the object.
1045 sw(end_address, Address(temp1, Heap::TopOffset(space))); 1045 sw(end_address, Address(temp1, Heap::TopOffset(space)));
1046 addiu(instance, instance, Immediate(kHeapObjectTag)); 1046 addiu(instance, instance, Immediate(kHeapObjectTag));
1047 LoadImmediate(temp1, instance_size); 1047 LoadImmediate(temp1, instance_size);
1048 NOT_IN_PRODUCT(UpdateAllocationStatsWithSize(cid, temp1, temp2, space)); 1048 NOT_IN_PRODUCT(UpdateAllocationStatsWithSize(cid, temp1, temp2, space));
1049 1049
1050 // Initialize the tags. 1050 // Initialize the tags.
1051 // instance: new object start as a tagged pointer. 1051 // instance: new object start as a tagged pointer.
1052 uword tags = 0; 1052 uint32_t tags = 0;
1053 tags = RawObject::ClassIdTag::update(cid, tags); 1053 tags = RawObject::ClassIdTag::update(cid, tags);
1054 tags = RawObject::SizeTag::update(instance_size, tags); 1054 tags = RawObject::SizeTag::update(instance_size, tags);
1055 LoadImmediate(temp1, tags); 1055 LoadImmediate(temp1, tags);
1056 sw(temp1, FieldAddress(instance, Array::tags_offset())); // Store tags. 1056 sw(temp1, FieldAddress(instance, Array::tags_offset())); // Store tags.
1057 } else { 1057 } else {
1058 b(failure); 1058 b(failure);
1059 } 1059 }
1060 } 1060 }
1061 1061
1062 1062
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1401 Label stop; 1401 Label stop;
1402 b(&stop); 1402 b(&stop);
1403 Emit(reinterpret_cast<int32_t>(message)); 1403 Emit(reinterpret_cast<int32_t>(message));
1404 Bind(&stop); 1404 Bind(&stop);
1405 break_(Instr::kStopMessageCode); 1405 break_(Instr::kStopMessageCode);
1406 } 1406 }
1407 1407
1408 } // namespace dart 1408 } // namespace dart
1409 1409
1410 #endif // defined TARGET_ARCH_MIPS 1410 #endif // defined TARGET_ARCH_MIPS
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