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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" // Needed here to get TARGET_ARCH_X64. | 5 #include "vm/globals.h" // Needed here to get TARGET_ARCH_X64. |
6 #if defined(TARGET_ARCH_X64) | 6 #if defined(TARGET_ARCH_X64) |
7 | 7 |
8 #include "vm/intermediate_language.h" | 8 #include "vm/intermediate_language.h" |
9 | 9 |
10 #include "vm/dart_entry.h" | 10 #include "vm/dart_entry.h" |
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2066 if (type_arguments().IsRawInstantiatedRaw(len)) { | 2066 if (type_arguments().IsRawInstantiatedRaw(len)) { |
2067 __ CompareObject(instantiator_reg, Object::null_object(), PP); | 2067 __ CompareObject(instantiator_reg, Object::null_object(), PP); |
2068 __ j(EQUAL, &type_arguments_instantiated, Assembler::kNearJump); | 2068 __ j(EQUAL, &type_arguments_instantiated, Assembler::kNearJump); |
2069 } | 2069 } |
2070 | 2070 |
2071 // Lookup cache before calling runtime. | 2071 // Lookup cache before calling runtime. |
2072 // TODO(fschneider): Consider moving this into a shared stub to reduce | 2072 // TODO(fschneider): Consider moving this into a shared stub to reduce |
2073 // generated code size. | 2073 // generated code size. |
2074 __ LoadObject(RDI, type_arguments(), PP); | 2074 __ LoadObject(RDI, type_arguments(), PP); |
2075 __ movq(RDI, FieldAddress(RDI, TypeArguments::instantiations_offset())); | 2075 __ movq(RDI, FieldAddress(RDI, TypeArguments::instantiations_offset())); |
2076 __ movq(RBX, FieldAddress(RDI, Array::length_offset())); | |
2077 __ leaq(RDI, FieldAddress(RDI, Array::data_offset())); | 2076 __ leaq(RDI, FieldAddress(RDI, Array::data_offset())); |
2078 __ leaq(RBX, Address(RDI, RBX, TIMES_2, 0)); // RBX is smi. | 2077 // The instantiations cache is initialized with Object::zero_array() and is |
| 2078 // therefore guaranteed to contain kNoInstantiator. No length check needed. |
2079 Label loop, found, slow_case; | 2079 Label loop, found, slow_case; |
2080 __ Bind(&loop); | 2080 __ Bind(&loop); |
2081 __ cmpq(RDI, RBX); | |
2082 __ j(ABOVE_EQUAL, &slow_case); | |
2083 __ movq(RDX, Address(RDI, 0 * kWordSize)); // Cached instantiator. | 2081 __ movq(RDX, Address(RDI, 0 * kWordSize)); // Cached instantiator. |
2084 __ cmpq(RDX, RAX); | 2082 __ cmpq(RDX, RAX); |
2085 __ j(EQUAL, &found, Assembler::kNearJump); | 2083 __ j(EQUAL, &found, Assembler::kNearJump); |
2086 __ cmpq(RDX, Immediate(Smi::RawValue(StubCode::kNoInstantiator))); | 2084 __ cmpq(RDX, Immediate(Smi::RawValue(StubCode::kNoInstantiator))); |
2087 __ j(EQUAL, &slow_case); | 2085 __ j(EQUAL, &slow_case); |
2088 __ addq(RDI, Immediate(2 * kWordSize)); | 2086 __ addq(RDI, Immediate(2 * kWordSize)); |
2089 __ jmp(&loop, Assembler::kNearJump); | 2087 __ jmp(&loop, Assembler::kNearJump); |
2090 __ Bind(&found); | 2088 __ Bind(&found); |
2091 __ movq(RAX, Address(RDI, 1 * kWordSize)); // Cached instantiated args. | 2089 __ movq(RAX, Address(RDI, 1 * kWordSize)); // Cached instantiated args. |
2092 __ jmp(&type_arguments_instantiated); | 2090 __ jmp(&type_arguments_instantiated); |
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4992 PcDescriptors::kOther, | 4990 PcDescriptors::kOther, |
4993 locs()); | 4991 locs()); |
4994 __ Drop(2); // Discard type arguments and receiver. | 4992 __ Drop(2); // Discard type arguments and receiver. |
4995 } | 4993 } |
4996 | 4994 |
4997 } // namespace dart | 4995 } // namespace dart |
4998 | 4996 |
4999 #undef __ | 4997 #undef __ |
5000 | 4998 |
5001 #endif // defined TARGET_ARCH_X64 | 4999 #endif // defined TARGET_ARCH_X64 |
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