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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 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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2308 return static_cast<State>(target->compare_state()); | 2308 return static_cast<State>(target->compare_state()); |
2309 } | 2309 } |
2310 | 2310 |
2311 | 2311 |
2312 const char* CompareIC::GetStateName(State state) { | 2312 const char* CompareIC::GetStateName(State state) { |
2313 switch (state) { | 2313 switch (state) { |
2314 case UNINITIALIZED: return "UNINITIALIZED"; | 2314 case UNINITIALIZED: return "UNINITIALIZED"; |
2315 case SMIS: return "SMIS"; | 2315 case SMIS: return "SMIS"; |
2316 case HEAP_NUMBERS: return "HEAP_NUMBERS"; | 2316 case HEAP_NUMBERS: return "HEAP_NUMBERS"; |
2317 case OBJECTS: return "OBJECTS"; | 2317 case OBJECTS: return "OBJECTS"; |
2318 case KNOWN_OBJECTS: return "OBJECTS"; | |
2318 case SYMBOLS: return "SYMBOLS"; | 2319 case SYMBOLS: return "SYMBOLS"; |
2319 case STRINGS: return "STRINGS"; | 2320 case STRINGS: return "STRINGS"; |
2320 case GENERIC: return "GENERIC"; | 2321 case GENERIC: return "GENERIC"; |
2321 default: | 2322 default: |
2322 UNREACHABLE(); | 2323 UNREACHABLE(); |
2323 return NULL; | 2324 return NULL; |
2324 } | 2325 } |
2325 } | 2326 } |
2326 | 2327 |
2327 | 2328 |
2328 CompareIC::State CompareIC::TargetState(State state, | 2329 CompareIC::State CompareIC::TargetState(State state, |
2329 bool has_inlined_smi_code, | 2330 bool has_inlined_smi_code, |
2330 Handle<Object> x, | 2331 Handle<Object> x, |
2331 Handle<Object> y) { | 2332 Handle<Object> y) { |
2332 if (!has_inlined_smi_code && state != UNINITIALIZED && state != SYMBOLS) { | 2333 switch (state) { |
2333 return GENERIC; | 2334 case UNINITIALIZED: |
2335 if (x->IsSmi() && y->IsSmi()) return SMIS; | |
2336 if (x->IsNumber() && y->IsNumber()) return HEAP_NUMBERS; | |
2337 if (!Token::IsEqualityOp(op_)) return GENERIC; | |
2338 if (x->IsSymbol() && y->IsSymbol()) return SYMBOLS; | |
2339 if (x->IsString() && y->IsString()) return STRINGS; | |
2340 if (x->IsJSObject() && y->IsJSObject()) { | |
2341 if (Handle<JSObject>::cast(x)->map() == | |
2342 Handle<JSObject>::cast(y)->map() && | |
2343 (op_ == Token::EQ || op_ == Token::EQ_STRICT)) { | |
Kevin Millikin (Chromium)
2011/11/11 10:12:34
This is much nicer.
The last check can be written
Rico
2011/11/15 10:12:26
Done.
| |
2344 return KNOWN_OBJECTS; | |
2345 } else { | |
2346 return OBJECTS; | |
2347 } | |
2348 } | |
2349 return GENERIC; | |
2350 case SMIS: | |
2351 return has_inlined_smi_code && x->IsNumber() && y->IsNumber() | |
2352 ? HEAP_NUMBERS | |
2353 : GENERIC; | |
2354 case SYMBOLS: | |
2355 ASSERT(Token::IsEqualityOp(op_)); | |
2356 return x->IsString() && y->IsString() ? STRINGS : GENERIC; | |
2357 case HEAP_NUMBERS: | |
2358 case STRINGS: | |
2359 case OBJECTS: | |
2360 case KNOWN_OBJECTS: | |
2361 case GENERIC: | |
2362 return GENERIC; | |
2334 } | 2363 } |
2335 if (state == UNINITIALIZED && x->IsSmi() && y->IsSmi()) return SMIS; | |
2336 if ((state == UNINITIALIZED || (state == SMIS && has_inlined_smi_code)) && | |
2337 x->IsNumber() && y->IsNumber()) return HEAP_NUMBERS; | |
2338 if (op_ != Token::EQ && op_ != Token::EQ_STRICT) return GENERIC; | |
2339 if (state == UNINITIALIZED && | |
2340 x->IsSymbol() && y->IsSymbol()) return SYMBOLS; | |
2341 if ((state == UNINITIALIZED || state == SYMBOLS) && | |
2342 x->IsString() && y->IsString()) return STRINGS; | |
2343 if (state == UNINITIALIZED && | |
2344 x->IsJSObject() && y->IsJSObject()) return OBJECTS; | |
2345 return GENERIC; | |
2346 } | 2364 } |
2347 | 2365 |
2348 | 2366 |
2349 // Used from ic_<arch>.cc. | 2367 // Used from ic_<arch>.cc. |
2350 RUNTIME_FUNCTION(Code*, CompareIC_Miss) { | 2368 RUNTIME_FUNCTION(Code*, CompareIC_Miss) { |
2351 NoHandleAllocation na; | 2369 NoHandleAllocation na; |
2352 ASSERT(args.length() == 3); | 2370 ASSERT(args.length() == 3); |
2353 CompareIC ic(isolate, static_cast<Token::Value>(args.smi_at(2))); | 2371 CompareIC ic(isolate, static_cast<Token::Value>(args.smi_at(2))); |
2354 ic.UpdateCaches(args.at<Object>(0), args.at<Object>(1)); | 2372 ic.UpdateCaches(args.at<Object>(0), args.at<Object>(1)); |
2355 return ic.target(); | 2373 return ic.target(); |
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2388 #undef ADDR | 2406 #undef ADDR |
2389 }; | 2407 }; |
2390 | 2408 |
2391 | 2409 |
2392 Address IC::AddressFromUtilityId(IC::UtilityId id) { | 2410 Address IC::AddressFromUtilityId(IC::UtilityId id) { |
2393 return IC_utilities[id]; | 2411 return IC_utilities[id]; |
2394 } | 2412 } |
2395 | 2413 |
2396 | 2414 |
2397 } } // namespace v8::internal | 2415 } } // namespace v8::internal |
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