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| 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, 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_IA32) | 6 #if defined(TARGET_ARCH_IA32) |
| 7 | 7 |
| 8 #include "vm/assembler.h" | 8 #include "vm/assembler.h" |
| 9 #include "vm/assembler_macros.h" | 9 #include "vm/assembler_macros.h" |
| 10 #include "vm/compiler.h" | 10 #include "vm/compiler.h" |
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| 1107 // ESP : points to return address. | 1107 // ESP : points to return address. |
| 1108 // Uses EAX, EBX, ECX, EDX, EDI as temporary registers. | 1108 // Uses EAX, EBX, ECX, EDX, EDI as temporary registers. |
| 1109 void StubCode::GenerateAllocationStubForClass(Assembler* assembler, | 1109 void StubCode::GenerateAllocationStubForClass(Assembler* assembler, |
| 1110 const Class& cls) { | 1110 const Class& cls) { |
| 1111 const intptr_t kObjectTypeArgumentsOffset = 2 * kWordSize; | 1111 const intptr_t kObjectTypeArgumentsOffset = 2 * kWordSize; |
| 1112 const intptr_t kInstantiatorTypeArgumentsOffset = 1 * kWordSize; | 1112 const intptr_t kInstantiatorTypeArgumentsOffset = 1 * kWordSize; |
| 1113 const Immediate raw_null = | 1113 const Immediate raw_null = |
| 1114 Immediate(reinterpret_cast<intptr_t>(Object::null())); | 1114 Immediate(reinterpret_cast<intptr_t>(Object::null())); |
| 1115 // The generated code is different if the class is parameterized. | 1115 // The generated code is different if the class is parameterized. |
| 1116 const bool is_cls_parameterized = | 1116 const bool is_cls_parameterized = |
| 1117 cls.type_arguments_instance_field_offset() != Class::kNoTypeArguments; | 1117 cls.type_arguments_field_offset() != Class::kNoTypeArguments; |
| 1118 // kInlineInstanceSize is a constant used as a threshold for determining | 1118 // kInlineInstanceSize is a constant used as a threshold for determining |
| 1119 // when the object initialization should be done as a loop or as | 1119 // when the object initialization should be done as a loop or as |
| 1120 // straight line code. | 1120 // straight line code. |
| 1121 const int kInlineInstanceSize = 12; | 1121 const int kInlineInstanceSize = 12; |
| 1122 const intptr_t instance_size = cls.instance_size(); | 1122 const intptr_t instance_size = cls.instance_size(); |
| 1123 ASSERT(instance_size > 0); | 1123 ASSERT(instance_size > 0); |
| 1124 const intptr_t type_args_size = InstantiatedTypeArguments::InstanceSize(); | 1124 const intptr_t type_args_size = InstantiatedTypeArguments::InstanceSize(); |
| 1125 if (FLAG_inline_alloc && | 1125 if (FLAG_inline_alloc && |
| 1126 PageSpace::IsPageAllocatableSize(instance_size + type_args_size)) { | 1126 PageSpace::IsPageAllocatableSize(instance_size + type_args_size)) { |
| 1127 Label slow_case; | 1127 Label slow_case; |
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| 1232 __ cmpl(ECX, EBX); | 1232 __ cmpl(ECX, EBX); |
| 1233 __ j(ABOVE_EQUAL, &done, Assembler::kNearJump); | 1233 __ j(ABOVE_EQUAL, &done, Assembler::kNearJump); |
| 1234 __ movl(Address(ECX, 0), raw_null); | 1234 __ movl(Address(ECX, 0), raw_null); |
| 1235 __ addl(ECX, Immediate(kWordSize)); | 1235 __ addl(ECX, Immediate(kWordSize)); |
| 1236 __ jmp(&init_loop, Assembler::kNearJump); | 1236 __ jmp(&init_loop, Assembler::kNearJump); |
| 1237 __ Bind(&done); | 1237 __ Bind(&done); |
| 1238 } | 1238 } |
| 1239 if (is_cls_parameterized) { | 1239 if (is_cls_parameterized) { |
| 1240 // EDI: new object type arguments. | 1240 // EDI: new object type arguments. |
| 1241 // Set the type arguments in the new object. | 1241 // Set the type arguments in the new object. |
| 1242 __ movl(Address(EAX, cls.type_arguments_instance_field_offset()), EDI); | 1242 __ movl(Address(EAX, cls.type_arguments_field_offset()), EDI); |
| 1243 } | 1243 } |
| 1244 // Done allocating and initializing the instance. | 1244 // Done allocating and initializing the instance. |
| 1245 // EAX: new object. | 1245 // EAX: new object. |
| 1246 __ addl(EAX, Immediate(kHeapObjectTag)); | 1246 __ addl(EAX, Immediate(kHeapObjectTag)); |
| 1247 __ ret(); | 1247 __ ret(); |
| 1248 | 1248 |
| 1249 __ Bind(&slow_case); | 1249 __ Bind(&slow_case); |
| 1250 } | 1250 } |
| 1251 if (is_cls_parameterized) { | 1251 if (is_cls_parameterized) { |
| 1252 __ movl(EAX, Address(ESP, kObjectTypeArgumentsOffset)); | 1252 __ movl(EAX, Address(ESP, kObjectTypeArgumentsOffset)); |
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| 1874 const Immediate raw_null = | 1874 const Immediate raw_null = |
| 1875 Immediate(reinterpret_cast<intptr_t>(Object::null())); | 1875 Immediate(reinterpret_cast<intptr_t>(Object::null())); |
| 1876 __ movl(EAX, Address(ESP, kInstanceOffsetInBytes)); | 1876 __ movl(EAX, Address(ESP, kInstanceOffsetInBytes)); |
| 1877 if (n > 1) { | 1877 if (n > 1) { |
| 1878 // Get instance type arguments. | 1878 // Get instance type arguments. |
| 1879 __ LoadClass(ECX, EAX, EBX); | 1879 __ LoadClass(ECX, EAX, EBX); |
| 1880 // Compute instance type arguments into EBX. | 1880 // Compute instance type arguments into EBX. |
| 1881 Label has_no_type_arguments; | 1881 Label has_no_type_arguments; |
| 1882 __ movl(EBX, raw_null); | 1882 __ movl(EBX, raw_null); |
| 1883 __ movl(EDI, FieldAddress(ECX, | 1883 __ movl(EDI, FieldAddress(ECX, |
| 1884 Class::type_arguments_instance_field_offset_offset())); | 1884 Class::type_arguments_field_offset_offset())); |
| 1885 __ cmpl(EDI, Immediate(Class::kNoTypeArguments)); | 1885 __ cmpl(EDI, Immediate(Class::kNoTypeArguments)); |
| 1886 __ j(EQUAL, &has_no_type_arguments, Assembler::kNearJump); | 1886 __ j(EQUAL, &has_no_type_arguments, Assembler::kNearJump); |
| 1887 __ movl(EBX, FieldAddress(EAX, EDI, TIMES_1, 0)); | 1887 __ movl(EBX, FieldAddress(EAX, EDI, TIMES_1, 0)); |
| 1888 __ Bind(&has_no_type_arguments); | 1888 __ Bind(&has_no_type_arguments); |
| 1889 } | 1889 } |
| 1890 __ LoadClassId(ECX, EAX); | 1890 __ LoadClassId(ECX, EAX); |
| 1891 // EAX: instance, ECX: instance class id. | 1891 // EAX: instance, ECX: instance class id. |
| 1892 // EBX: instance type arguments (null if none), used only if n > 1. | 1892 // EBX: instance type arguments (null if none), used only if n > 1. |
| 1893 __ movl(EDX, Address(ESP, kCacheOffsetInBytes)); | 1893 __ movl(EDX, Address(ESP, kCacheOffsetInBytes)); |
| 1894 // EDX: SubtypeTestCache. | 1894 // EDX: SubtypeTestCache. |
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| 2212 __ Bind(&done); | 2212 __ Bind(&done); |
| 2213 __ popl(temp); | 2213 __ popl(temp); |
| 2214 __ popl(right); | 2214 __ popl(right); |
| 2215 __ popl(left); | 2215 __ popl(left); |
| 2216 __ ret(); | 2216 __ ret(); |
| 2217 } | 2217 } |
| 2218 | 2218 |
| 2219 } // namespace dart | 2219 } // namespace dart |
| 2220 | 2220 |
| 2221 #endif // defined TARGET_ARCH_IA32 | 2221 #endif // defined TARGET_ARCH_IA32 |
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