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Issue 2132803002: Megamorphic code cleanup. (Closed) Base URL: git@github.com:dart-lang/sdk.git@master
Patch Set: Created 4 years, 5 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" 5 #include "vm/globals.h"
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/code_generator.h" 9 #include "vm/code_generator.h"
10 #include "vm/compiler.h" 10 #include "vm/compiler.h"
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2205 const Register temp2 = T3; 2205 const Register temp2 = T3;
2206 const Register left = T1; 2206 const Register left = T1;
2207 const Register right = T0; 2207 const Register right = T0;
2208 __ lw(left, Address(SP, 1 * kWordSize)); 2208 __ lw(left, Address(SP, 1 * kWordSize));
2209 __ lw(right, Address(SP, 0 * kWordSize)); 2209 __ lw(right, Address(SP, 0 * kWordSize));
2210 GenerateIdenticalWithNumberCheckStub(assembler, left, right, temp1, temp2); 2210 GenerateIdenticalWithNumberCheckStub(assembler, left, right, temp1, temp2);
2211 __ Ret(); 2211 __ Ret();
2212 } 2212 }
2213 2213
2214 2214
2215 void StubCode::EmitMegamorphicLookup(Assembler* assembler) { 2215 // Called from megamorphic calls.
2216 // T0: receiver
2217 // S5: MegamorphicCache (preserved)
2218 // Result:
2219 // T1: target entry point
2220 // CODE_REG: target Code
2221 // S4: arguments descriptor
2222 void StubCode::GenerateMegamorphicLookupStub(Assembler* assembler) {
2216 __ LoadTaggedClassIdMayBeSmi(T0, T0); 2223 __ LoadTaggedClassIdMayBeSmi(T0, T0);
2217 // T0: class ID of the receiver (smi). 2224 // T0: class ID of the receiver (smi).
2218 __ lw(S4, FieldAddress(S5, MegamorphicCache::arguments_descriptor_offset())); 2225 __ lw(S4, FieldAddress(S5, MegamorphicCache::arguments_descriptor_offset()));
2219 __ lw(T2, FieldAddress(S5, MegamorphicCache::buckets_offset())); 2226 __ lw(T2, FieldAddress(S5, MegamorphicCache::buckets_offset()));
2220 __ lw(T1, FieldAddress(S5, MegamorphicCache::mask_offset())); 2227 __ lw(T1, FieldAddress(S5, MegamorphicCache::mask_offset()));
2221 // T2: cache buckets array. 2228 // T2: cache buckets array.
2222 // T1: mask. 2229 // T1: mask.
2223 __ LoadImmediate(TMP, MegamorphicCache::kSpreadFactor); 2230 __ LoadImmediate(TMP, MegamorphicCache::kSpreadFactor);
2224 __ mult(TMP, T0); 2231 __ mult(TMP, T0);
2225 __ mflo(T3); 2232 __ mflo(T3);
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2246 // Call the target found in the cache. For a class id match, this is a 2253 // Call the target found in the cache. For a class id match, this is a
2247 // proper target for the given name and arguments descriptor. If the 2254 // proper target for the given name and arguments descriptor. If the
2248 // illegal class id was found, the target is a cache miss handler that can 2255 // illegal class id was found, the target is a cache miss handler that can
2249 // be invoked as a normal Dart function. 2256 // be invoked as a normal Dart function.
2250 __ sll(T1, T3, 2); 2257 __ sll(T1, T3, 2);
2251 __ addu(T1, T2, T1); 2258 __ addu(T1, T2, T1);
2252 __ lw(T0, FieldAddress(T1, base + kWordSize)); 2259 __ lw(T0, FieldAddress(T1, base + kWordSize));
2253 2260
2254 __ lw(T1, FieldAddress(T0, Function::entry_point_offset())); 2261 __ lw(T1, FieldAddress(T0, Function::entry_point_offset()));
2255 __ lw(CODE_REG, FieldAddress(T0, Function::code_offset())); 2262 __ lw(CODE_REG, FieldAddress(T0, Function::code_offset()));
2256 }
2257
2258
2259 // Called from megamorphic calls.
2260 // T0: receiver
2261 // S5: MegamorphicCache (preserved)
2262 // Result:
2263 // T1: target entry point
2264 // CODE_REG: target Code
2265 // S4: arguments descriptor
2266 void StubCode::GenerateMegamorphicLookupStub(Assembler* assembler) {
2267 EmitMegamorphicLookup(assembler);
2268 __ Ret(); 2263 __ Ret();
2269 } 2264 }
2270 2265
2271 2266
2272 // Called from switchable IC calls. 2267 // Called from switchable IC calls.
2273 // T0: receiver 2268 // T0: receiver
2274 // S5: ICData (preserved) 2269 // S5: ICData (preserved)
2275 // Result: 2270 // Result:
2276 // T1: target entry point 2271 // T1: target entry point
2277 // CODE_REG: target Code object 2272 // CODE_REG: target Code object
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2344 } 2339 }
2345 2340
2346 2341
2347 void StubCode::GenerateFrameAwaitingMaterializationStub(Assembler* assembler) { 2342 void StubCode::GenerateFrameAwaitingMaterializationStub(Assembler* assembler) {
2348 __ break_(0); 2343 __ break_(0);
2349 } 2344 }
2350 2345
2351 } // namespace dart 2346 } // namespace dart
2352 2347
2353 #endif // defined TARGET_ARCH_MIPS 2348 #endif // defined TARGET_ARCH_MIPS
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