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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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2194 __ j(not_equal, &miss); | 2194 __ j(not_equal, &miss); |
2195 | 2195 |
2196 // Make sure the function is the Array() function | 2196 // Make sure the function is the Array() function |
2197 __ LoadArrayFunction(rcx); | 2197 __ LoadArrayFunction(rcx); |
2198 __ cmpq(rdi, rcx); | 2198 __ cmpq(rdi, rcx); |
2199 __ j(not_equal, &megamorphic); | 2199 __ j(not_equal, &megamorphic); |
2200 __ jmp(&done); | 2200 __ jmp(&done); |
2201 | 2201 |
2202 __ bind(&miss); | 2202 __ bind(&miss); |
2203 | 2203 |
2204 // A monomorphic miss (i.e, here the cache is not uninitialized or | 2204 // A monomorphic miss (i.e, here the cache is not uninitialized) goes |
2205 // pre-monomorphic) goes megamorphic. | 2205 // megamorphic. |
2206 Label not_uninitialized; | |
2207 __ Cmp(rcx, TypeFeedbackInfo::UninitializedSentinel(isolate)); | 2206 __ Cmp(rcx, TypeFeedbackInfo::UninitializedSentinel(isolate)); |
2208 __ j(not_equal, ¬_uninitialized); | |
2209 | |
2210 // PremonomorphicSentinel is an immortal immovable object (null) so no | |
2211 // write-barrier is needed. | |
2212 __ Move(FieldOperand(rbx, rdx, times_pointer_size, FixedArray::kHeaderSize), | |
2213 TypeFeedbackInfo::PremonomorphicSentinel(isolate)); | |
2214 __ jmp(&done); | |
2215 | |
2216 // If the cache isn't uninitialized, it is either premonomorphic or | |
2217 // monomorphic. If it is premonomorphic, we initialize it thus making | |
2218 // it monomorphic. Otherwise, we go megamorphic. | |
2219 __ bind(¬_uninitialized); | |
2220 __ Cmp(rcx, TypeFeedbackInfo::PremonomorphicSentinel(isolate)); | |
2221 __ j(equal, &initialize); | 2207 __ j(equal, &initialize); |
2222 | |
2223 // MegamorphicSentinel is an immortal immovable object (undefined) so no | 2208 // MegamorphicSentinel is an immortal immovable object (undefined) so no |
2224 // write-barrier is needed. | 2209 // write-barrier is needed. |
2225 __ bind(&megamorphic); | 2210 __ bind(&megamorphic); |
2226 __ Move(FieldOperand(rbx, rdx, times_pointer_size, FixedArray::kHeaderSize), | 2211 __ Move(FieldOperand(rbx, rdx, times_pointer_size, FixedArray::kHeaderSize), |
2227 TypeFeedbackInfo::MegamorphicSentinel(isolate)); | 2212 TypeFeedbackInfo::MegamorphicSentinel(isolate)); |
2228 __ jmp(&done); | 2213 __ jmp(&done); |
2229 | 2214 |
2230 // An uninitialized cache is patched with the function or sentinel to | 2215 // An uninitialized cache is patched with the function or sentinel to |
2231 // indicate the ElementsKind if function is the Array constructor. | 2216 // indicate the ElementsKind if function is the Array constructor. |
2232 __ bind(&initialize); | 2217 __ bind(&initialize); |
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5344 return_value_operand, | 5329 return_value_operand, |
5345 NULL); | 5330 NULL); |
5346 } | 5331 } |
5347 | 5332 |
5348 | 5333 |
5349 #undef __ | 5334 #undef __ |
5350 | 5335 |
5351 } } // namespace v8::internal | 5336 } } // namespace v8::internal |
5352 | 5337 |
5353 #endif // V8_TARGET_ARCH_X64 | 5338 #endif // V8_TARGET_ARCH_X64 |
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