Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #ifndef V8_MIPS_CODE_STUBS_ARM_H_ |
| 29 | #define V8_MIPS_CODE_STUBS_ARM_H_ |
| 30 | |
| 31 | #include "ic-inl.h" |
| 32 | |
| 33 | |
| 34 | namespace v8 { |
| 35 | namespace internal { |
| 36 | |
| 37 | |
| 38 | // Compute a transcendental math function natively, or call the |
| 39 | // TranscendentalCache runtime function. |
| 40 | class TranscendentalCacheStub: public CodeStub { |
| 41 | public: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 42 | enum ArgumentType { |
| 43 | TAGGED = 0 << TranscendentalCache::kTranscendentalTypeBits, |
| 44 | UNTAGGED = 1 << TranscendentalCache::kTranscendentalTypeBits |
| 45 | }; |
| 46 | |
| 47 | TranscendentalCacheStub(TranscendentalCache::Type type, |
| 48 | ArgumentType argument_type) |
| 49 | : type_(type), argument_type_(argument_type) { } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 50 | void Generate(MacroAssembler* masm); |
| 51 | private: |
| 52 | TranscendentalCache::Type type_; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 53 | ArgumentType argument_type_; |
| 54 | void GenerateCallCFunction(MacroAssembler* masm, Register scratch); |
| 55 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 56 | Major MajorKey() { return TranscendentalCache; } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 57 | int MinorKey() { return type_ | argument_type_; } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 58 | Runtime::FunctionId RuntimeFunction(); |
| 59 | }; |
| 60 | |
| 61 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 62 | class StoreBufferOverflowStub: public CodeStub { |
| 63 | public: |
| 64 | explicit StoreBufferOverflowStub(SaveFPRegsMode save_fp) |
| 65 | : save_doubles_(save_fp) { } |
| 66 | |
| 67 | void Generate(MacroAssembler* masm); |
| 68 | |
| 69 | virtual bool IsPregenerated(); |
| 70 | static void GenerateFixedRegStubsAheadOfTime(); |
| 71 | virtual bool SometimesSetsUpAFrame() { return false; } |
| 72 | |
| 73 | private: |
| 74 | SaveFPRegsMode save_doubles_; |
| 75 | |
| 76 | Major MajorKey() { return StoreBufferOverflow; } |
| 77 | int MinorKey() { return (save_doubles_ == kSaveFPRegs) ? 1 : 0; } |
| 78 | }; |
| 79 | |
| 80 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 81 | class UnaryOpStub: public CodeStub { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 82 | public: |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 83 | UnaryOpStub(Token::Value op, |
| 84 | UnaryOverwriteMode mode, |
| 85 | UnaryOpIC::TypeInfo operand_type = UnaryOpIC::UNINITIALIZED) |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 86 | : op_(op), |
| 87 | mode_(mode), |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 88 | operand_type_(operand_type) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 89 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 90 | |
| 91 | private: |
| 92 | Token::Value op_; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 93 | UnaryOverwriteMode mode_; |
| 94 | |
| 95 | // Operand type information determined at runtime. |
| 96 | UnaryOpIC::TypeInfo operand_type_; |
| 97 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 98 | virtual void PrintName(StringStream* stream); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 99 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 100 | class ModeBits: public BitField<UnaryOverwriteMode, 0, 1> {}; |
| 101 | class OpBits: public BitField<Token::Value, 1, 7> {}; |
| 102 | class OperandTypeInfoBits: public BitField<UnaryOpIC::TypeInfo, 8, 3> {}; |
| 103 | |
| 104 | Major MajorKey() { return UnaryOp; } |
| 105 | int MinorKey() { |
| 106 | return ModeBits::encode(mode_) |
| 107 | | OpBits::encode(op_) |
| 108 | | OperandTypeInfoBits::encode(operand_type_); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 109 | } |
| 110 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 111 | // Note: A lot of the helper functions below will vanish when we use virtual |
| 112 | // function instead of switch more often. |
| 113 | void Generate(MacroAssembler* masm); |
| 114 | |
| 115 | void GenerateTypeTransition(MacroAssembler* masm); |
| 116 | |
| 117 | void GenerateSmiStub(MacroAssembler* masm); |
| 118 | void GenerateSmiStubSub(MacroAssembler* masm); |
| 119 | void GenerateSmiStubBitNot(MacroAssembler* masm); |
| 120 | void GenerateSmiCodeSub(MacroAssembler* masm, Label* non_smi, Label* slow); |
| 121 | void GenerateSmiCodeBitNot(MacroAssembler* masm, Label* slow); |
| 122 | |
| 123 | void GenerateHeapNumberStub(MacroAssembler* masm); |
| 124 | void GenerateHeapNumberStubSub(MacroAssembler* masm); |
| 125 | void GenerateHeapNumberStubBitNot(MacroAssembler* masm); |
| 126 | void GenerateHeapNumberCodeSub(MacroAssembler* masm, Label* slow); |
| 127 | void GenerateHeapNumberCodeBitNot(MacroAssembler* masm, Label* slow); |
| 128 | |
| 129 | void GenerateGenericStub(MacroAssembler* masm); |
| 130 | void GenerateGenericStubSub(MacroAssembler* masm); |
| 131 | void GenerateGenericStubBitNot(MacroAssembler* masm); |
| 132 | void GenerateGenericCodeFallback(MacroAssembler* masm); |
| 133 | |
| 134 | virtual int GetCodeKind() { return Code::UNARY_OP_IC; } |
| 135 | |
| 136 | virtual InlineCacheState GetICState() { |
| 137 | return UnaryOpIC::ToState(operand_type_); |
| 138 | } |
| 139 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 140 | virtual void FinishCode(Handle<Code> code) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 141 | code->set_unary_op_type(operand_type_); |
| 142 | } |
| 143 | }; |
| 144 | |
| 145 | |
| 146 | class BinaryOpStub: public CodeStub { |
| 147 | public: |
| 148 | BinaryOpStub(Token::Value op, OverwriteMode mode) |
| 149 | : op_(op), |
| 150 | mode_(mode), |
| 151 | operands_type_(BinaryOpIC::UNINITIALIZED), |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 152 | result_type_(BinaryOpIC::UNINITIALIZED) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 153 | use_fpu_ = CpuFeatures::IsSupported(FPU); |
| 154 | ASSERT(OpBits::is_valid(Token::NUM_TOKENS)); |
| 155 | } |
| 156 | |
| 157 | BinaryOpStub( |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 158 | int key, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 159 | BinaryOpIC::TypeInfo operands_type, |
| 160 | BinaryOpIC::TypeInfo result_type = BinaryOpIC::UNINITIALIZED) |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 161 | : op_(OpBits::decode(key)), |
| 162 | mode_(ModeBits::decode(key)), |
| 163 | use_fpu_(FPUBits::decode(key)), |
| 164 | operands_type_(operands_type), |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 165 | result_type_(result_type) { } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 166 | |
| 167 | private: |
| 168 | enum SmiCodeGenerateHeapNumberResults { |
| 169 | ALLOW_HEAPNUMBER_RESULTS, |
| 170 | NO_HEAPNUMBER_RESULTS |
| 171 | }; |
| 172 | |
| 173 | Token::Value op_; |
| 174 | OverwriteMode mode_; |
| 175 | bool use_fpu_; |
| 176 | |
| 177 | // Operand type information determined at runtime. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 178 | BinaryOpIC::TypeInfo operands_type_; |
| 179 | BinaryOpIC::TypeInfo result_type_; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 180 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 181 | virtual void PrintName(StringStream* stream); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 182 | |
| 183 | // Minor key encoding in 16 bits RRRTTTVOOOOOOOMM. |
| 184 | class ModeBits: public BitField<OverwriteMode, 0, 2> {}; |
| 185 | class OpBits: public BitField<Token::Value, 2, 7> {}; |
| 186 | class FPUBits: public BitField<bool, 9, 1> {}; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 187 | class OperandTypeInfoBits: public BitField<BinaryOpIC::TypeInfo, 10, 3> {}; |
| 188 | class ResultTypeInfoBits: public BitField<BinaryOpIC::TypeInfo, 13, 3> {}; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 189 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 190 | Major MajorKey() { return BinaryOp; } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 191 | int MinorKey() { |
| 192 | return OpBits::encode(op_) |
| 193 | | ModeBits::encode(mode_) |
| 194 | | FPUBits::encode(use_fpu_) |
| 195 | | OperandTypeInfoBits::encode(operands_type_) |
| 196 | | ResultTypeInfoBits::encode(result_type_); |
| 197 | } |
| 198 | |
| 199 | void Generate(MacroAssembler* masm); |
| 200 | void GenerateGeneric(MacroAssembler* masm); |
| 201 | void GenerateSmiSmiOperation(MacroAssembler* masm); |
| 202 | void GenerateFPOperation(MacroAssembler* masm, |
| 203 | bool smi_operands, |
| 204 | Label* not_numbers, |
| 205 | Label* gc_required); |
| 206 | void GenerateSmiCode(MacroAssembler* masm, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 207 | Label* use_runtime, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 208 | Label* gc_required, |
| 209 | SmiCodeGenerateHeapNumberResults heapnumber_results); |
| 210 | void GenerateLoadArguments(MacroAssembler* masm); |
| 211 | void GenerateReturn(MacroAssembler* masm); |
| 212 | void GenerateUninitializedStub(MacroAssembler* masm); |
| 213 | void GenerateSmiStub(MacroAssembler* masm); |
| 214 | void GenerateInt32Stub(MacroAssembler* masm); |
| 215 | void GenerateHeapNumberStub(MacroAssembler* masm); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 216 | void GenerateOddballStub(MacroAssembler* masm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 217 | void GenerateStringStub(MacroAssembler* masm); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 218 | void GenerateBothStringStub(MacroAssembler* masm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 219 | void GenerateGenericStub(MacroAssembler* masm); |
| 220 | void GenerateAddStrings(MacroAssembler* masm); |
| 221 | void GenerateCallRuntime(MacroAssembler* masm); |
| 222 | |
| 223 | void GenerateHeapResultAllocation(MacroAssembler* masm, |
| 224 | Register result, |
| 225 | Register heap_number_map, |
| 226 | Register scratch1, |
| 227 | Register scratch2, |
| 228 | Label* gc_required); |
| 229 | void GenerateRegisterArgsPush(MacroAssembler* masm); |
| 230 | void GenerateTypeTransition(MacroAssembler* masm); |
| 231 | void GenerateTypeTransitionWithSavedArgs(MacroAssembler* masm); |
| 232 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 233 | virtual int GetCodeKind() { return Code::BINARY_OP_IC; } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 234 | |
| 235 | virtual InlineCacheState GetICState() { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 236 | return BinaryOpIC::ToState(operands_type_); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 237 | } |
| 238 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 239 | virtual void FinishCode(Handle<Code> code) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 240 | code->set_binary_op_type(operands_type_); |
| 241 | code->set_binary_op_result_type(result_type_); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | friend class CodeGenerator; |
| 245 | }; |
| 246 | |
| 247 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 248 | class StringHelper : public AllStatic { |
| 249 | public: |
| 250 | // Generate code for copying characters using a simple loop. This should only |
| 251 | // be used in places where the number of characters is small and the |
| 252 | // additional setup and checking in GenerateCopyCharactersLong adds too much |
| 253 | // overhead. Copying of overlapping regions is not supported. |
| 254 | // Dest register ends at the position after the last character written. |
| 255 | static void GenerateCopyCharacters(MacroAssembler* masm, |
| 256 | Register dest, |
| 257 | Register src, |
| 258 | Register count, |
| 259 | Register scratch, |
| 260 | bool ascii); |
| 261 | |
| 262 | // Generate code for copying a large number of characters. This function |
| 263 | // is allowed to spend extra time setting up conditions to make copying |
| 264 | // faster. Copying of overlapping regions is not supported. |
| 265 | // Dest register ends at the position after the last character written. |
| 266 | static void GenerateCopyCharactersLong(MacroAssembler* masm, |
| 267 | Register dest, |
| 268 | Register src, |
| 269 | Register count, |
| 270 | Register scratch1, |
| 271 | Register scratch2, |
| 272 | Register scratch3, |
| 273 | Register scratch4, |
| 274 | Register scratch5, |
| 275 | int flags); |
| 276 | |
| 277 | |
| 278 | // Probe the symbol table for a two character string. If the string is |
| 279 | // not found by probing a jump to the label not_found is performed. This jump |
| 280 | // does not guarantee that the string is not in the symbol table. If the |
| 281 | // string is found the code falls through with the string in register r0. |
| 282 | // Contents of both c1 and c2 registers are modified. At the exit c1 is |
| 283 | // guaranteed to contain halfword with low and high bytes equal to |
| 284 | // initial contents of c1 and c2 respectively. |
| 285 | static void GenerateTwoCharacterSymbolTableProbe(MacroAssembler* masm, |
| 286 | Register c1, |
| 287 | Register c2, |
| 288 | Register scratch1, |
| 289 | Register scratch2, |
| 290 | Register scratch3, |
| 291 | Register scratch4, |
| 292 | Register scratch5, |
| 293 | Label* not_found); |
| 294 | |
| 295 | // Generate string hash. |
| 296 | static void GenerateHashInit(MacroAssembler* masm, |
| 297 | Register hash, |
| 298 | Register character); |
| 299 | |
| 300 | static void GenerateHashAddCharacter(MacroAssembler* masm, |
| 301 | Register hash, |
| 302 | Register character); |
| 303 | |
| 304 | static void GenerateHashGetHash(MacroAssembler* masm, |
| 305 | Register hash); |
| 306 | |
| 307 | private: |
| 308 | DISALLOW_IMPLICIT_CONSTRUCTORS(StringHelper); |
| 309 | }; |
| 310 | |
| 311 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 312 | // Flag that indicates how to generate code for the stub StringAddStub. |
| 313 | enum StringAddFlags { |
| 314 | NO_STRING_ADD_FLAGS = 0, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 315 | // Omit left string check in stub (left is definitely a string). |
| 316 | NO_STRING_CHECK_LEFT_IN_STUB = 1 << 0, |
| 317 | // Omit right string check in stub (right is definitely a string). |
| 318 | NO_STRING_CHECK_RIGHT_IN_STUB = 1 << 1, |
| 319 | // Omit both string checks in stub. |
| 320 | NO_STRING_CHECK_IN_STUB = |
| 321 | NO_STRING_CHECK_LEFT_IN_STUB | NO_STRING_CHECK_RIGHT_IN_STUB |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 322 | }; |
| 323 | |
| 324 | |
| 325 | class StringAddStub: public CodeStub { |
| 326 | public: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 327 | explicit StringAddStub(StringAddFlags flags) : flags_(flags) {} |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 328 | |
| 329 | private: |
| 330 | Major MajorKey() { return StringAdd; } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 331 | int MinorKey() { return flags_; } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 332 | |
| 333 | void Generate(MacroAssembler* masm); |
| 334 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 335 | void GenerateConvertArgument(MacroAssembler* masm, |
| 336 | int stack_offset, |
| 337 | Register arg, |
| 338 | Register scratch1, |
| 339 | Register scratch2, |
| 340 | Register scratch3, |
| 341 | Register scratch4, |
| 342 | Label* slow); |
| 343 | |
| 344 | const StringAddFlags flags_; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 345 | }; |
| 346 | |
| 347 | |
| 348 | class SubStringStub: public CodeStub { |
| 349 | public: |
| 350 | SubStringStub() {} |
| 351 | |
| 352 | private: |
| 353 | Major MajorKey() { return SubString; } |
| 354 | int MinorKey() { return 0; } |
| 355 | |
| 356 | void Generate(MacroAssembler* masm); |
| 357 | }; |
| 358 | |
| 359 | |
| 360 | class StringCompareStub: public CodeStub { |
| 361 | public: |
| 362 | StringCompareStub() { } |
| 363 | |
| 364 | // Compare two flat ASCII strings and returns result in v0. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 365 | static void GenerateCompareFlatAsciiStrings(MacroAssembler* masm, |
| 366 | Register left, |
| 367 | Register right, |
| 368 | Register scratch1, |
| 369 | Register scratch2, |
| 370 | Register scratch3, |
| 371 | Register scratch4); |
| 372 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 373 | // Compares two flat ASCII strings for equality and returns result |
| 374 | // in v0. |
| 375 | static void GenerateFlatAsciiStringEquals(MacroAssembler* masm, |
| 376 | Register left, |
| 377 | Register right, |
| 378 | Register scratch1, |
| 379 | Register scratch2, |
| 380 | Register scratch3); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 381 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 382 | private: |
| 383 | virtual Major MajorKey() { return StringCompare; } |
| 384 | virtual int MinorKey() { return 0; } |
| 385 | virtual void Generate(MacroAssembler* masm); |
| 386 | |
| 387 | static void GenerateAsciiCharsCompareLoop(MacroAssembler* masm, |
| 388 | Register left, |
| 389 | Register right, |
| 390 | Register length, |
| 391 | Register scratch1, |
| 392 | Register scratch2, |
| 393 | Register scratch3, |
| 394 | Label* chars_not_equal); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 395 | }; |
| 396 | |
| 397 | |
| 398 | // This stub can convert a signed int32 to a heap number (double). It does |
| 399 | // not work for int32s that are in Smi range! No GC occurs during this stub |
| 400 | // so you don't have to set up the frame. |
| 401 | class WriteInt32ToHeapNumberStub : public CodeStub { |
| 402 | public: |
| 403 | WriteInt32ToHeapNumberStub(Register the_int, |
| 404 | Register the_heap_number, |
| 405 | Register scratch, |
| 406 | Register scratch2) |
| 407 | : the_int_(the_int), |
| 408 | the_heap_number_(the_heap_number), |
| 409 | scratch_(scratch), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 410 | sign_(scratch2) { |
| 411 | ASSERT(IntRegisterBits::is_valid(the_int_.code())); |
| 412 | ASSERT(HeapNumberRegisterBits::is_valid(the_heap_number_.code())); |
| 413 | ASSERT(ScratchRegisterBits::is_valid(scratch_.code())); |
| 414 | ASSERT(SignRegisterBits::is_valid(sign_.code())); |
| 415 | } |
| 416 | |
| 417 | bool IsPregenerated(); |
| 418 | static void GenerateFixedRegStubsAheadOfTime(); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 419 | |
| 420 | private: |
| 421 | Register the_int_; |
| 422 | Register the_heap_number_; |
| 423 | Register scratch_; |
| 424 | Register sign_; |
| 425 | |
| 426 | // Minor key encoding in 16 bits. |
| 427 | class IntRegisterBits: public BitField<int, 0, 4> {}; |
| 428 | class HeapNumberRegisterBits: public BitField<int, 4, 4> {}; |
| 429 | class ScratchRegisterBits: public BitField<int, 8, 4> {}; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 430 | class SignRegisterBits: public BitField<int, 12, 4> {}; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 431 | |
| 432 | Major MajorKey() { return WriteInt32ToHeapNumber; } |
| 433 | int MinorKey() { |
| 434 | // Encode the parameters in a unique 16 bit value. |
| 435 | return IntRegisterBits::encode(the_int_.code()) |
| 436 | | HeapNumberRegisterBits::encode(the_heap_number_.code()) |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 437 | | ScratchRegisterBits::encode(scratch_.code()) |
| 438 | | SignRegisterBits::encode(sign_.code()); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 439 | } |
| 440 | |
| 441 | void Generate(MacroAssembler* masm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 442 | }; |
| 443 | |
| 444 | |
| 445 | class NumberToStringStub: public CodeStub { |
| 446 | public: |
| 447 | NumberToStringStub() { } |
| 448 | |
| 449 | // Generate code to do a lookup in the number string cache. If the number in |
| 450 | // the register object is found in the cache the generated code falls through |
| 451 | // with the result in the result register. The object and the result register |
| 452 | // can be the same. If the number is not found in the cache the code jumps to |
| 453 | // the label not_found with only the content of register object unchanged. |
| 454 | static void GenerateLookupNumberStringCache(MacroAssembler* masm, |
| 455 | Register object, |
| 456 | Register result, |
| 457 | Register scratch1, |
| 458 | Register scratch2, |
| 459 | Register scratch3, |
| 460 | bool object_is_smi, |
| 461 | Label* not_found); |
| 462 | |
| 463 | private: |
| 464 | Major MajorKey() { return NumberToString; } |
| 465 | int MinorKey() { return 0; } |
| 466 | |
| 467 | void Generate(MacroAssembler* masm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 468 | }; |
| 469 | |
| 470 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 471 | class RecordWriteStub: public CodeStub { |
| 472 | public: |
| 473 | RecordWriteStub(Register object, |
| 474 | Register value, |
| 475 | Register address, |
| 476 | RememberedSetAction remembered_set_action, |
| 477 | SaveFPRegsMode fp_mode) |
| 478 | : object_(object), |
| 479 | value_(value), |
| 480 | address_(address), |
| 481 | remembered_set_action_(remembered_set_action), |
| 482 | save_fp_regs_mode_(fp_mode), |
| 483 | regs_(object, // An input reg. |
| 484 | address, // An input reg. |
| 485 | value) { // One scratch reg. |
| 486 | } |
| 487 | |
| 488 | enum Mode { |
| 489 | STORE_BUFFER_ONLY, |
| 490 | INCREMENTAL, |
| 491 | INCREMENTAL_COMPACTION |
| 492 | }; |
| 493 | |
| 494 | virtual bool IsPregenerated(); |
| 495 | static void GenerateFixedRegStubsAheadOfTime(); |
| 496 | virtual bool SometimesSetsUpAFrame() { return false; } |
| 497 | |
| 498 | static void PatchBranchIntoNop(MacroAssembler* masm, int pos) { |
| 499 | const unsigned offset = masm->instr_at(pos) & kImm16Mask; |
| 500 | masm->instr_at_put(pos, BNE | (zero_reg.code() << kRsShift) | |
| 501 | (zero_reg.code() << kRtShift) | (offset & kImm16Mask)); |
| 502 | ASSERT(Assembler::IsBne(masm->instr_at(pos))); |
| 503 | } |
| 504 | |
| 505 | static void PatchNopIntoBranch(MacroAssembler* masm, int pos) { |
| 506 | const unsigned offset = masm->instr_at(pos) & kImm16Mask; |
| 507 | masm->instr_at_put(pos, BEQ | (zero_reg.code() << kRsShift) | |
| 508 | (zero_reg.code() << kRtShift) | (offset & kImm16Mask)); |
| 509 | ASSERT(Assembler::IsBeq(masm->instr_at(pos))); |
| 510 | } |
| 511 | |
| 512 | static Mode GetMode(Code* stub) { |
| 513 | Instr first_instruction = Assembler::instr_at(stub->instruction_start()); |
| 514 | Instr second_instruction = Assembler::instr_at(stub->instruction_start() + |
| 515 | 2 * Assembler::kInstrSize); |
| 516 | |
| 517 | if (Assembler::IsBeq(first_instruction)) { |
| 518 | return INCREMENTAL; |
| 519 | } |
| 520 | |
| 521 | ASSERT(Assembler::IsBne(first_instruction)); |
| 522 | |
| 523 | if (Assembler::IsBeq(second_instruction)) { |
| 524 | return INCREMENTAL_COMPACTION; |
| 525 | } |
| 526 | |
| 527 | ASSERT(Assembler::IsBne(second_instruction)); |
| 528 | |
| 529 | return STORE_BUFFER_ONLY; |
| 530 | } |
| 531 | |
| 532 | static void Patch(Code* stub, Mode mode) { |
| 533 | MacroAssembler masm(NULL, |
| 534 | stub->instruction_start(), |
| 535 | stub->instruction_size()); |
| 536 | switch (mode) { |
| 537 | case STORE_BUFFER_ONLY: |
| 538 | ASSERT(GetMode(stub) == INCREMENTAL || |
| 539 | GetMode(stub) == INCREMENTAL_COMPACTION); |
| 540 | PatchBranchIntoNop(&masm, 0); |
| 541 | PatchBranchIntoNop(&masm, 2 * Assembler::kInstrSize); |
| 542 | break; |
| 543 | case INCREMENTAL: |
| 544 | ASSERT(GetMode(stub) == STORE_BUFFER_ONLY); |
| 545 | PatchNopIntoBranch(&masm, 0); |
| 546 | break; |
| 547 | case INCREMENTAL_COMPACTION: |
| 548 | ASSERT(GetMode(stub) == STORE_BUFFER_ONLY); |
| 549 | PatchNopIntoBranch(&masm, 2 * Assembler::kInstrSize); |
| 550 | break; |
| 551 | } |
| 552 | ASSERT(GetMode(stub) == mode); |
| 553 | CPU::FlushICache(stub->instruction_start(), 4 * Assembler::kInstrSize); |
| 554 | } |
| 555 | |
| 556 | private: |
| 557 | // This is a helper class for freeing up 3 scratch registers. The input is |
| 558 | // two registers that must be preserved and one scratch register provided by |
| 559 | // the caller. |
| 560 | class RegisterAllocation { |
| 561 | public: |
| 562 | RegisterAllocation(Register object, |
| 563 | Register address, |
| 564 | Register scratch0) |
| 565 | : object_(object), |
| 566 | address_(address), |
| 567 | scratch0_(scratch0) { |
| 568 | ASSERT(!AreAliased(scratch0, object, address, no_reg)); |
| 569 | scratch1_ = GetRegThatIsNotOneOf(object_, address_, scratch0_); |
| 570 | } |
| 571 | |
| 572 | void Save(MacroAssembler* masm) { |
| 573 | ASSERT(!AreAliased(object_, address_, scratch1_, scratch0_)); |
| 574 | // We don't have to save scratch0_ because it was given to us as |
| 575 | // a scratch register. |
| 576 | masm->push(scratch1_); |
| 577 | } |
| 578 | |
| 579 | void Restore(MacroAssembler* masm) { |
| 580 | masm->pop(scratch1_); |
| 581 | } |
| 582 | |
| 583 | // If we have to call into C then we need to save and restore all caller- |
| 584 | // saved registers that were not already preserved. The scratch registers |
| 585 | // will be restored by other means so we don't bother pushing them here. |
| 586 | void SaveCallerSaveRegisters(MacroAssembler* masm, SaveFPRegsMode mode) { |
| 587 | masm->MultiPush((kJSCallerSaved | ra.bit()) & ~scratch1_.bit()); |
| 588 | if (mode == kSaveFPRegs) { |
| 589 | CpuFeatures::Scope scope(FPU); |
| 590 | masm->MultiPushFPU(kCallerSavedFPU); |
| 591 | } |
| 592 | } |
| 593 | |
| 594 | inline void RestoreCallerSaveRegisters(MacroAssembler*masm, |
| 595 | SaveFPRegsMode mode) { |
| 596 | if (mode == kSaveFPRegs) { |
| 597 | CpuFeatures::Scope scope(FPU); |
| 598 | masm->MultiPopFPU(kCallerSavedFPU); |
| 599 | } |
| 600 | masm->MultiPop((kJSCallerSaved | ra.bit()) & ~scratch1_.bit()); |
| 601 | } |
| 602 | |
| 603 | inline Register object() { return object_; } |
| 604 | inline Register address() { return address_; } |
| 605 | inline Register scratch0() { return scratch0_; } |
| 606 | inline Register scratch1() { return scratch1_; } |
| 607 | |
| 608 | private: |
| 609 | Register object_; |
| 610 | Register address_; |
| 611 | Register scratch0_; |
| 612 | Register scratch1_; |
| 613 | |
| 614 | Register GetRegThatIsNotOneOf(Register r1, |
| 615 | Register r2, |
| 616 | Register r3) { |
| 617 | for (int i = 0; i < Register::kNumAllocatableRegisters; i++) { |
| 618 | Register candidate = Register::FromAllocationIndex(i); |
| 619 | if (candidate.is(r1)) continue; |
| 620 | if (candidate.is(r2)) continue; |
| 621 | if (candidate.is(r3)) continue; |
| 622 | return candidate; |
| 623 | } |
| 624 | UNREACHABLE(); |
| 625 | return no_reg; |
| 626 | } |
| 627 | friend class RecordWriteStub; |
| 628 | }; |
| 629 | |
| 630 | enum OnNoNeedToInformIncrementalMarker { |
| 631 | kReturnOnNoNeedToInformIncrementalMarker, |
| 632 | kUpdateRememberedSetOnNoNeedToInformIncrementalMarker |
| 633 | }; |
| 634 | |
| 635 | void Generate(MacroAssembler* masm); |
| 636 | void GenerateIncremental(MacroAssembler* masm, Mode mode); |
| 637 | void CheckNeedsToInformIncrementalMarker( |
| 638 | MacroAssembler* masm, |
| 639 | OnNoNeedToInformIncrementalMarker on_no_need, |
| 640 | Mode mode); |
| 641 | void InformIncrementalMarker(MacroAssembler* masm, Mode mode); |
| 642 | |
| 643 | Major MajorKey() { return RecordWrite; } |
| 644 | |
| 645 | int MinorKey() { |
| 646 | return ObjectBits::encode(object_.code()) | |
| 647 | ValueBits::encode(value_.code()) | |
| 648 | AddressBits::encode(address_.code()) | |
| 649 | RememberedSetActionBits::encode(remembered_set_action_) | |
| 650 | SaveFPRegsModeBits::encode(save_fp_regs_mode_); |
| 651 | } |
| 652 | |
| 653 | void Activate(Code* code) { |
| 654 | code->GetHeap()->incremental_marking()->ActivateGeneratedStub(code); |
| 655 | } |
| 656 | |
| 657 | class ObjectBits: public BitField<int, 0, 5> {}; |
| 658 | class ValueBits: public BitField<int, 5, 5> {}; |
| 659 | class AddressBits: public BitField<int, 10, 5> {}; |
| 660 | class RememberedSetActionBits: public BitField<RememberedSetAction, 15, 1> {}; |
| 661 | class SaveFPRegsModeBits: public BitField<SaveFPRegsMode, 16, 1> {}; |
| 662 | |
| 663 | Register object_; |
| 664 | Register value_; |
| 665 | Register address_; |
| 666 | RememberedSetAction remembered_set_action_; |
| 667 | SaveFPRegsMode save_fp_regs_mode_; |
| 668 | Label slow_; |
| 669 | RegisterAllocation regs_; |
| 670 | }; |
| 671 | |
| 672 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 673 | // Enter C code from generated RegExp code in a way that allows |
| 674 | // the C code to fix the return address in case of a GC. |
| 675 | // Currently only needed on ARM and MIPS. |
| 676 | class RegExpCEntryStub: public CodeStub { |
| 677 | public: |
| 678 | RegExpCEntryStub() {} |
| 679 | virtual ~RegExpCEntryStub() {} |
| 680 | void Generate(MacroAssembler* masm); |
| 681 | |
| 682 | private: |
| 683 | Major MajorKey() { return RegExpCEntry; } |
| 684 | int MinorKey() { return 0; } |
| 685 | |
| 686 | bool NeedsImmovableCode() { return true; } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 687 | }; |
| 688 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 689 | // Trampoline stub to call into native code. To call safely into native code |
| 690 | // in the presence of compacting GC (which can move code objects) we need to |
| 691 | // keep the code which called into native pinned in the memory. Currently the |
| 692 | // simplest approach is to generate such stub early enough so it can never be |
| 693 | // moved by GC |
| 694 | class DirectCEntryStub: public CodeStub { |
| 695 | public: |
| 696 | DirectCEntryStub() {} |
| 697 | void Generate(MacroAssembler* masm); |
| 698 | void GenerateCall(MacroAssembler* masm, |
| 699 | ExternalReference function); |
| 700 | void GenerateCall(MacroAssembler* masm, Register target); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 701 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 702 | private: |
| 703 | Major MajorKey() { return DirectCEntry; } |
| 704 | int MinorKey() { return 0; } |
| 705 | |
| 706 | bool NeedsImmovableCode() { return true; } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 707 | }; |
| 708 | |
| 709 | class FloatingPointHelper : public AllStatic { |
| 710 | public: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 711 | enum Destination { |
| 712 | kFPURegisters, |
| 713 | kCoreRegisters |
| 714 | }; |
| 715 | |
| 716 | |
| 717 | // Loads smis from a0 and a1 (right and left in binary operations) into |
| 718 | // floating point registers. Depending on the destination the values ends up |
| 719 | // either f14 and f12 or in a2/a3 and a0/a1 respectively. If the destination |
| 720 | // is floating point registers FPU must be supported. If core registers are |
| 721 | // requested when FPU is supported f12 and f14 will be scratched. |
| 722 | static void LoadSmis(MacroAssembler* masm, |
| 723 | Destination destination, |
| 724 | Register scratch1, |
| 725 | Register scratch2); |
| 726 | |
| 727 | // Loads objects from a0 and a1 (right and left in binary operations) into |
| 728 | // floating point registers. Depending on the destination the values ends up |
| 729 | // either f14 and f12 or in a2/a3 and a0/a1 respectively. If the destination |
| 730 | // is floating point registers FPU must be supported. If core registers are |
| 731 | // requested when FPU is supported f12 and f14 will still be scratched. If |
| 732 | // either a0 or a1 is not a number (not smi and not heap number object) the |
| 733 | // not_number label is jumped to with a0 and a1 intact. |
| 734 | static void LoadOperands(MacroAssembler* masm, |
| 735 | FloatingPointHelper::Destination destination, |
| 736 | Register heap_number_map, |
| 737 | Register scratch1, |
| 738 | Register scratch2, |
| 739 | Label* not_number); |
| 740 | |
| 741 | // Convert the smi or heap number in object to an int32 using the rules |
| 742 | // for ToInt32 as described in ECMAScript 9.5.: the value is truncated |
| 743 | // and brought into the range -2^31 .. +2^31 - 1. |
| 744 | static void ConvertNumberToInt32(MacroAssembler* masm, |
| 745 | Register object, |
| 746 | Register dst, |
| 747 | Register heap_number_map, |
| 748 | Register scratch1, |
| 749 | Register scratch2, |
| 750 | Register scratch3, |
| 751 | FPURegister double_scratch, |
| 752 | Label* not_int32); |
| 753 | |
| 754 | // Converts the integer (untagged smi) in |int_scratch| to a double, storing |
| 755 | // the result either in |double_dst| or |dst2:dst1|, depending on |
| 756 | // |destination|. |
| 757 | // Warning: The value in |int_scratch| will be changed in the process! |
| 758 | static void ConvertIntToDouble(MacroAssembler* masm, |
| 759 | Register int_scratch, |
| 760 | Destination destination, |
| 761 | FPURegister double_dst, |
| 762 | Register dst1, |
| 763 | Register dst2, |
| 764 | Register scratch2, |
| 765 | FPURegister single_scratch); |
| 766 | |
| 767 | // Load the number from object into double_dst in the double format. |
| 768 | // Control will jump to not_int32 if the value cannot be exactly represented |
| 769 | // by a 32-bit integer. |
| 770 | // Floating point value in the 32-bit integer range that are not exact integer |
| 771 | // won't be loaded. |
| 772 | static void LoadNumberAsInt32Double(MacroAssembler* masm, |
| 773 | Register object, |
| 774 | Destination destination, |
| 775 | FPURegister double_dst, |
| 776 | Register dst1, |
| 777 | Register dst2, |
| 778 | Register heap_number_map, |
| 779 | Register scratch1, |
| 780 | Register scratch2, |
| 781 | FPURegister single_scratch, |
| 782 | Label* not_int32); |
| 783 | |
| 784 | // Loads the number from object into dst as a 32-bit integer. |
| 785 | // Control will jump to not_int32 if the object cannot be exactly represented |
| 786 | // by a 32-bit integer. |
| 787 | // Floating point value in the 32-bit integer range that are not exact integer |
| 788 | // won't be converted. |
| 789 | // scratch3 is not used when FPU is supported. |
| 790 | static void LoadNumberAsInt32(MacroAssembler* masm, |
| 791 | Register object, |
| 792 | Register dst, |
| 793 | Register heap_number_map, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 794 | Register scratch1, |
| 795 | Register scratch2, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 796 | Register scratch3, |
| 797 | FPURegister double_scratch, |
| 798 | Label* not_int32); |
| 799 | |
| 800 | // Generate non FPU code to check if a double can be exactly represented by a |
| 801 | // 32-bit integer. This does not check for 0 or -0, which need |
| 802 | // to be checked for separately. |
| 803 | // Control jumps to not_int32 if the value is not a 32-bit integer, and falls |
| 804 | // through otherwise. |
| 805 | // src1 and src2 will be cloberred. |
| 806 | // |
| 807 | // Expected input: |
| 808 | // - src1: higher (exponent) part of the double value. |
| 809 | // - src2: lower (mantissa) part of the double value. |
| 810 | // Output status: |
| 811 | // - dst: 32 higher bits of the mantissa. (mantissa[51:20]) |
| 812 | // - src2: contains 1. |
| 813 | // - other registers are clobbered. |
| 814 | static void DoubleIs32BitInteger(MacroAssembler* masm, |
| 815 | Register src1, |
| 816 | Register src2, |
| 817 | Register dst, |
| 818 | Register scratch, |
| 819 | Label* not_int32); |
| 820 | |
| 821 | // Generates code to call a C function to do a double operation using core |
| 822 | // registers. (Used when FPU is not supported.) |
| 823 | // This code never falls through, but returns with a heap number containing |
| 824 | // the result in v0. |
| 825 | // Register heapnumber_result must be a heap number in which the |
| 826 | // result of the operation will be stored. |
| 827 | // Requires the following layout on entry: |
| 828 | // a0: Left value (least significant part of mantissa). |
| 829 | // a1: Left value (sign, exponent, top of mantissa). |
| 830 | // a2: Right value (least significant part of mantissa). |
| 831 | // a3: Right value (sign, exponent, top of mantissa). |
| 832 | static void CallCCodeForDoubleOperation(MacroAssembler* masm, |
| 833 | Token::Value op, |
| 834 | Register heap_number_result, |
| 835 | Register scratch); |
| 836 | |
| 837 | private: |
| 838 | static void LoadNumber(MacroAssembler* masm, |
| 839 | FloatingPointHelper::Destination destination, |
| 840 | Register object, |
| 841 | FPURegister dst, |
| 842 | Register dst1, |
| 843 | Register dst2, |
| 844 | Register heap_number_map, |
| 845 | Register scratch1, |
| 846 | Register scratch2, |
| 847 | Label* not_number); |
| 848 | }; |
| 849 | |
| 850 | |
| 851 | class StringDictionaryLookupStub: public CodeStub { |
| 852 | public: |
| 853 | enum LookupMode { POSITIVE_LOOKUP, NEGATIVE_LOOKUP }; |
| 854 | |
| 855 | explicit StringDictionaryLookupStub(LookupMode mode) : mode_(mode) { } |
| 856 | |
| 857 | void Generate(MacroAssembler* masm); |
| 858 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 859 | static void GenerateNegativeLookup(MacroAssembler* masm, |
| 860 | Label* miss, |
| 861 | Label* done, |
| 862 | Register receiver, |
| 863 | Register properties, |
| 864 | Handle<String> name, |
| 865 | Register scratch0); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 866 | |
| 867 | static void GeneratePositiveLookup(MacroAssembler* masm, |
| 868 | Label* miss, |
| 869 | Label* done, |
| 870 | Register elements, |
| 871 | Register name, |
| 872 | Register r0, |
| 873 | Register r1); |
| 874 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 875 | virtual bool SometimesSetsUpAFrame() { return false; } |
| 876 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 877 | private: |
| 878 | static const int kInlinedProbes = 4; |
| 879 | static const int kTotalProbes = 20; |
| 880 | |
| 881 | static const int kCapacityOffset = |
| 882 | StringDictionary::kHeaderSize + |
| 883 | StringDictionary::kCapacityIndex * kPointerSize; |
| 884 | |
| 885 | static const int kElementsStartOffset = |
| 886 | StringDictionary::kHeaderSize + |
| 887 | StringDictionary::kElementsStartIndex * kPointerSize; |
| 888 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 889 | Major MajorKey() { return StringDictionaryLookup; } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 890 | |
| 891 | int MinorKey() { |
| 892 | return LookupModeBits::encode(mode_); |
| 893 | } |
| 894 | |
| 895 | class LookupModeBits: public BitField<LookupMode, 0, 1> {}; |
| 896 | |
| 897 | LookupMode mode_; |
| 898 | }; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 899 | |
| 900 | |
| 901 | } } // namespace v8::internal |
| 902 | |
| 903 | #endif // V8_MIPS_CODE_STUBS_ARM_H_ |