Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +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_X64_CODE_STUBS_X64_H_ |
| 29 | #define V8_X64_CODE_STUBS_X64_H_ |
| 30 | |
| 31 | #include "ic-inl.h" |
| 32 | #include "type-info.h" |
| 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 | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 42 | enum ArgumentType { |
| 43 | TAGGED = 0, |
| 44 | UNTAGGED = 1 << TranscendentalCache::kTranscendentalTypeBits |
| 45 | }; |
| 46 | |
| 47 | explicit TranscendentalCacheStub(TranscendentalCache::Type type, |
| 48 | ArgumentType argument_type) |
| 49 | : type_(type), argument_type_(argument_type) {} |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 50 | void Generate(MacroAssembler* masm); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 51 | static void GenerateOperation(MacroAssembler* masm, |
| 52 | TranscendentalCache::Type type); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 53 | private: |
| 54 | TranscendentalCache::Type type_; |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 55 | ArgumentType argument_type_; |
| 56 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 57 | Major MajorKey() { return TranscendentalCache; } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 58 | int MinorKey() { return type_ | argument_type_; } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 59 | Runtime::FunctionId RuntimeFunction(); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 60 | }; |
| 61 | |
| 62 | |
| 63 | class StoreBufferOverflowStub: public CodeStub { |
| 64 | public: |
| 65 | explicit StoreBufferOverflowStub(SaveFPRegsMode save_fp) |
| 66 | : save_doubles_(save_fp) { } |
| 67 | |
| 68 | void Generate(MacroAssembler* masm); |
| 69 | |
| 70 | virtual bool IsPregenerated() { return true; } |
| 71 | static void GenerateFixedRegStubsAheadOfTime(); |
| 72 | virtual bool SometimesSetsUpAFrame() { return false; } |
| 73 | |
| 74 | private: |
| 75 | SaveFPRegsMode save_doubles_; |
| 76 | |
| 77 | Major MajorKey() { return StoreBufferOverflow; } |
| 78 | int MinorKey() { return (save_doubles_ == kSaveFPRegs) ? 1 : 0; } |
| 79 | }; |
| 80 | |
| 81 | |
| 82 | // Flag that indicates how to generate code for the stub GenericBinaryOpStub. |
| 83 | enum GenericBinaryFlags { |
| 84 | NO_GENERIC_BINARY_FLAGS = 0, |
| 85 | NO_SMI_CODE_IN_STUB = 1 << 0 // Omit smi code in stub. |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame] | 86 | }; |
| 87 | |
| 88 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 89 | class UnaryOpStub: public CodeStub { |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 90 | public: |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 91 | UnaryOpStub(Token::Value op, |
| 92 | UnaryOverwriteMode mode, |
| 93 | UnaryOpIC::TypeInfo operand_type = UnaryOpIC::UNINITIALIZED) |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 94 | : op_(op), |
| 95 | mode_(mode), |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 96 | operand_type_(operand_type) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | private: |
| 100 | Token::Value op_; |
| 101 | UnaryOverwriteMode mode_; |
| 102 | |
| 103 | // Operand type information determined at runtime. |
| 104 | UnaryOpIC::TypeInfo operand_type_; |
| 105 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 106 | virtual void PrintName(StringStream* stream); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 107 | |
| 108 | class ModeBits: public BitField<UnaryOverwriteMode, 0, 1> {}; |
| 109 | class OpBits: public BitField<Token::Value, 1, 7> {}; |
| 110 | class OperandTypeInfoBits: public BitField<UnaryOpIC::TypeInfo, 8, 3> {}; |
| 111 | |
| 112 | Major MajorKey() { return UnaryOp; } |
| 113 | int MinorKey() { |
| 114 | return ModeBits::encode(mode_) |
| 115 | | OpBits::encode(op_) |
| 116 | | OperandTypeInfoBits::encode(operand_type_); |
| 117 | } |
| 118 | |
| 119 | // Note: A lot of the helper functions below will vanish when we use virtual |
| 120 | // function instead of switch more often. |
| 121 | void Generate(MacroAssembler* masm); |
| 122 | |
| 123 | void GenerateTypeTransition(MacroAssembler* masm); |
| 124 | |
| 125 | void GenerateSmiStub(MacroAssembler* masm); |
| 126 | void GenerateSmiStubSub(MacroAssembler* masm); |
| 127 | void GenerateSmiStubBitNot(MacroAssembler* masm); |
| 128 | void GenerateSmiCodeSub(MacroAssembler* masm, |
| 129 | Label* non_smi, |
| 130 | Label* slow, |
| 131 | Label::Distance non_smi_near = Label::kFar, |
| 132 | Label::Distance slow_near = Label::kFar); |
| 133 | void GenerateSmiCodeBitNot(MacroAssembler* masm, |
| 134 | Label* non_smi, |
| 135 | Label::Distance non_smi_near); |
| 136 | |
| 137 | void GenerateHeapNumberStub(MacroAssembler* masm); |
| 138 | void GenerateHeapNumberStubSub(MacroAssembler* masm); |
| 139 | void GenerateHeapNumberStubBitNot(MacroAssembler* masm); |
| 140 | void GenerateHeapNumberCodeSub(MacroAssembler* masm, Label* slow); |
| 141 | void GenerateHeapNumberCodeBitNot(MacroAssembler* masm, Label* slow); |
| 142 | |
| 143 | void GenerateGenericStub(MacroAssembler* masm); |
| 144 | void GenerateGenericStubSub(MacroAssembler* masm); |
| 145 | void GenerateGenericStubBitNot(MacroAssembler* masm); |
| 146 | void GenerateGenericCodeFallback(MacroAssembler* masm); |
| 147 | |
| 148 | virtual int GetCodeKind() { return Code::UNARY_OP_IC; } |
| 149 | |
| 150 | virtual InlineCacheState GetICState() { |
| 151 | return UnaryOpIC::ToState(operand_type_); |
| 152 | } |
| 153 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 154 | virtual void FinishCode(Handle<Code> code) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 155 | code->set_unary_op_type(operand_type_); |
| 156 | } |
| 157 | }; |
| 158 | |
| 159 | |
| 160 | class BinaryOpStub: public CodeStub { |
| 161 | public: |
| 162 | BinaryOpStub(Token::Value op, OverwriteMode mode) |
| 163 | : op_(op), |
| 164 | mode_(mode), |
| 165 | operands_type_(BinaryOpIC::UNINITIALIZED), |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 166 | result_type_(BinaryOpIC::UNINITIALIZED) { |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 167 | ASSERT(OpBits::is_valid(Token::NUM_TOKENS)); |
| 168 | } |
| 169 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 170 | BinaryOpStub( |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 171 | int key, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 172 | BinaryOpIC::TypeInfo operands_type, |
| 173 | BinaryOpIC::TypeInfo result_type = BinaryOpIC::UNINITIALIZED) |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 174 | : op_(OpBits::decode(key)), |
| 175 | mode_(ModeBits::decode(key)), |
| 176 | operands_type_(operands_type), |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 177 | result_type_(result_type) { } |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 178 | |
| 179 | private: |
| 180 | enum SmiCodeGenerateHeapNumberResults { |
| 181 | ALLOW_HEAPNUMBER_RESULTS, |
| 182 | NO_HEAPNUMBER_RESULTS |
| 183 | }; |
| 184 | |
| 185 | Token::Value op_; |
| 186 | OverwriteMode mode_; |
| 187 | |
| 188 | // Operand type information determined at runtime. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 189 | BinaryOpIC::TypeInfo operands_type_; |
| 190 | BinaryOpIC::TypeInfo result_type_; |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 191 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 192 | virtual void PrintName(StringStream* stream); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 193 | |
| 194 | // Minor key encoding in 15 bits RRRTTTOOOOOOOMM. |
| 195 | class ModeBits: public BitField<OverwriteMode, 0, 2> {}; |
| 196 | class OpBits: public BitField<Token::Value, 2, 7> {}; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 197 | class OperandTypeInfoBits: public BitField<BinaryOpIC::TypeInfo, 9, 3> {}; |
| 198 | class ResultTypeInfoBits: public BitField<BinaryOpIC::TypeInfo, 12, 3> {}; |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 199 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 200 | Major MajorKey() { return BinaryOp; } |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 201 | int MinorKey() { |
| 202 | return OpBits::encode(op_) |
| 203 | | ModeBits::encode(mode_) |
| 204 | | OperandTypeInfoBits::encode(operands_type_) |
| 205 | | ResultTypeInfoBits::encode(result_type_); |
| 206 | } |
| 207 | |
| 208 | void Generate(MacroAssembler* masm); |
| 209 | void GenerateGeneric(MacroAssembler* masm); |
| 210 | void GenerateSmiCode(MacroAssembler* masm, |
| 211 | Label* slow, |
| 212 | SmiCodeGenerateHeapNumberResults heapnumber_results); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 213 | void GenerateFloatingPointCode(MacroAssembler* masm, |
| 214 | Label* allocation_failure, |
| 215 | Label* non_numeric_failure); |
| 216 | void GenerateStringAddCode(MacroAssembler* masm); |
| 217 | void GenerateCallRuntimeCode(MacroAssembler* masm); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 218 | void GenerateLoadArguments(MacroAssembler* masm); |
| 219 | void GenerateReturn(MacroAssembler* masm); |
| 220 | void GenerateUninitializedStub(MacroAssembler* masm); |
| 221 | void GenerateSmiStub(MacroAssembler* masm); |
| 222 | void GenerateInt32Stub(MacroAssembler* masm); |
| 223 | void GenerateHeapNumberStub(MacroAssembler* masm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 224 | void GenerateOddballStub(MacroAssembler* masm); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 225 | void GenerateStringStub(MacroAssembler* masm); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 226 | void GenerateBothStringStub(MacroAssembler* masm); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 227 | void GenerateGenericStub(MacroAssembler* masm); |
| 228 | |
| 229 | void GenerateHeapResultAllocation(MacroAssembler* masm, Label* alloc_failure); |
| 230 | void GenerateRegisterArgsPush(MacroAssembler* masm); |
| 231 | void GenerateTypeTransition(MacroAssembler* masm); |
| 232 | void GenerateTypeTransitionWithSavedArgs(MacroAssembler* masm); |
| 233 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 234 | virtual int GetCodeKind() { return Code::BINARY_OP_IC; } |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 235 | |
| 236 | virtual InlineCacheState GetICState() { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 237 | return BinaryOpIC::ToState(operands_type_); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 238 | } |
| 239 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 240 | virtual void FinishCode(Handle<Code> code) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 241 | code->set_binary_op_type(operands_type_); |
| 242 | code->set_binary_op_result_type(result_type_); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | friend class CodeGenerator; |
| 246 | }; |
| 247 | |
| 248 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 249 | class StringHelper : public AllStatic { |
| 250 | public: |
| 251 | // Generate code for copying characters using a simple loop. This should only |
| 252 | // be used in places where the number of characters is small and the |
| 253 | // additional setup and checking in GenerateCopyCharactersREP adds too much |
| 254 | // overhead. Copying of overlapping regions is not supported. |
| 255 | static void GenerateCopyCharacters(MacroAssembler* masm, |
| 256 | Register dest, |
| 257 | Register src, |
| 258 | Register count, |
| 259 | bool ascii); |
| 260 | |
| 261 | // Generate code for copying characters using the rep movs instruction. |
| 262 | // Copies rcx characters from rsi to rdi. Copying of overlapping regions is |
| 263 | // not supported. |
| 264 | static void GenerateCopyCharactersREP(MacroAssembler* masm, |
| 265 | Register dest, // Must be rdi. |
| 266 | Register src, // Must be rsi. |
| 267 | Register count, // Must be rcx. |
| 268 | bool ascii); |
| 269 | |
| 270 | |
| 271 | // Probe the symbol table for a two character string. If the string is |
| 272 | // not found by probing a jump to the label not_found is performed. This jump |
| 273 | // does not guarantee that the string is not in the symbol table. If the |
| 274 | // string is found the code falls through with the string in register rax. |
| 275 | static void GenerateTwoCharacterSymbolTableProbe(MacroAssembler* masm, |
| 276 | Register c1, |
| 277 | Register c2, |
| 278 | Register scratch1, |
| 279 | Register scratch2, |
| 280 | Register scratch3, |
| 281 | Register scratch4, |
| 282 | Label* not_found); |
| 283 | |
| 284 | // Generate string hash. |
| 285 | static void GenerateHashInit(MacroAssembler* masm, |
| 286 | Register hash, |
| 287 | Register character, |
| 288 | Register scratch); |
| 289 | static void GenerateHashAddCharacter(MacroAssembler* masm, |
| 290 | Register hash, |
| 291 | Register character, |
| 292 | Register scratch); |
| 293 | static void GenerateHashGetHash(MacroAssembler* masm, |
| 294 | Register hash, |
| 295 | Register scratch); |
| 296 | |
| 297 | private: |
| 298 | DISALLOW_IMPLICIT_CONSTRUCTORS(StringHelper); |
| 299 | }; |
| 300 | |
| 301 | |
| 302 | // Flag that indicates how to generate code for the stub StringAddStub. |
| 303 | enum StringAddFlags { |
| 304 | NO_STRING_ADD_FLAGS = 0, |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 305 | // Omit left string check in stub (left is definitely a string). |
| 306 | NO_STRING_CHECK_LEFT_IN_STUB = 1 << 0, |
| 307 | // Omit right string check in stub (right is definitely a string). |
| 308 | NO_STRING_CHECK_RIGHT_IN_STUB = 1 << 1, |
| 309 | // Omit both string checks in stub. |
| 310 | NO_STRING_CHECK_IN_STUB = |
| 311 | NO_STRING_CHECK_LEFT_IN_STUB | NO_STRING_CHECK_RIGHT_IN_STUB |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 312 | }; |
| 313 | |
| 314 | |
| 315 | class StringAddStub: public CodeStub { |
| 316 | public: |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 317 | explicit StringAddStub(StringAddFlags flags) : flags_(flags) {} |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 318 | |
| 319 | private: |
| 320 | Major MajorKey() { return StringAdd; } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 321 | int MinorKey() { return flags_; } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 322 | |
| 323 | void Generate(MacroAssembler* masm); |
| 324 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 325 | void GenerateConvertArgument(MacroAssembler* masm, |
| 326 | int stack_offset, |
| 327 | Register arg, |
| 328 | Register scratch1, |
| 329 | Register scratch2, |
| 330 | Register scratch3, |
| 331 | Label* slow); |
| 332 | |
| 333 | const StringAddFlags flags_; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 334 | }; |
| 335 | |
| 336 | |
| 337 | class SubStringStub: public CodeStub { |
| 338 | public: |
| 339 | SubStringStub() {} |
| 340 | |
| 341 | private: |
| 342 | Major MajorKey() { return SubString; } |
| 343 | int MinorKey() { return 0; } |
| 344 | |
| 345 | void Generate(MacroAssembler* masm); |
| 346 | }; |
| 347 | |
| 348 | |
| 349 | class StringCompareStub: public CodeStub { |
| 350 | public: |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 351 | StringCompareStub() {} |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 352 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 353 | // Compares two flat ASCII strings and returns result in rax. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 354 | static void GenerateCompareFlatAsciiStrings(MacroAssembler* masm, |
| 355 | Register left, |
| 356 | Register right, |
| 357 | Register scratch1, |
| 358 | Register scratch2, |
| 359 | Register scratch3, |
| 360 | Register scratch4); |
| 361 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 362 | // Compares two flat ASCII strings for equality and returns result |
| 363 | // in rax. |
| 364 | static void GenerateFlatAsciiStringEquals(MacroAssembler* masm, |
| 365 | Register left, |
| 366 | Register right, |
| 367 | Register scratch1, |
| 368 | Register scratch2); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 369 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 370 | private: |
| 371 | virtual Major MajorKey() { return StringCompare; } |
| 372 | virtual int MinorKey() { return 0; } |
| 373 | virtual void Generate(MacroAssembler* masm); |
| 374 | |
| 375 | static void GenerateAsciiCharsCompareLoop( |
| 376 | MacroAssembler* masm, |
| 377 | Register left, |
| 378 | Register right, |
| 379 | Register length, |
| 380 | Register scratch, |
| 381 | Label* chars_not_equal, |
| 382 | Label::Distance near_jump = Label::kFar); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 383 | }; |
| 384 | |
| 385 | |
| 386 | class NumberToStringStub: public CodeStub { |
| 387 | public: |
| 388 | NumberToStringStub() { } |
| 389 | |
| 390 | // Generate code to do a lookup in the number string cache. If the number in |
| 391 | // the register object is found in the cache the generated code falls through |
| 392 | // with the result in the result register. The object and the result register |
| 393 | // can be the same. If the number is not found in the cache the code jumps to |
| 394 | // the label not_found with only the content of register object unchanged. |
| 395 | static void GenerateLookupNumberStringCache(MacroAssembler* masm, |
| 396 | Register object, |
| 397 | Register result, |
| 398 | Register scratch1, |
| 399 | Register scratch2, |
| 400 | bool object_is_smi, |
| 401 | Label* not_found); |
| 402 | |
| 403 | private: |
| 404 | static void GenerateConvertHashCodeToIndex(MacroAssembler* masm, |
| 405 | Register hash, |
| 406 | Register mask); |
| 407 | |
| 408 | Major MajorKey() { return NumberToString; } |
| 409 | int MinorKey() { return 0; } |
| 410 | |
| 411 | void Generate(MacroAssembler* masm); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 412 | }; |
| 413 | |
| 414 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 415 | class StringDictionaryLookupStub: public CodeStub { |
| 416 | public: |
| 417 | enum LookupMode { POSITIVE_LOOKUP, NEGATIVE_LOOKUP }; |
| 418 | |
| 419 | StringDictionaryLookupStub(Register dictionary, |
| 420 | Register result, |
| 421 | Register index, |
| 422 | LookupMode mode) |
| 423 | : dictionary_(dictionary), result_(result), index_(index), mode_(mode) { } |
| 424 | |
| 425 | void Generate(MacroAssembler* masm); |
| 426 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 427 | static void GenerateNegativeLookup(MacroAssembler* masm, |
| 428 | Label* miss, |
| 429 | Label* done, |
| 430 | Register properties, |
| 431 | Handle<String> name, |
| 432 | Register r0); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 433 | |
| 434 | static void GeneratePositiveLookup(MacroAssembler* masm, |
| 435 | Label* miss, |
| 436 | Label* done, |
| 437 | Register elements, |
| 438 | Register name, |
| 439 | Register r0, |
| 440 | Register r1); |
| 441 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 442 | virtual bool SometimesSetsUpAFrame() { return false; } |
| 443 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 444 | private: |
| 445 | static const int kInlinedProbes = 4; |
| 446 | static const int kTotalProbes = 20; |
| 447 | |
| 448 | static const int kCapacityOffset = |
| 449 | StringDictionary::kHeaderSize + |
| 450 | StringDictionary::kCapacityIndex * kPointerSize; |
| 451 | |
| 452 | static const int kElementsStartOffset = |
| 453 | StringDictionary::kHeaderSize + |
| 454 | StringDictionary::kElementsStartIndex * kPointerSize; |
| 455 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 456 | Major MajorKey() { return StringDictionaryLookup; } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 457 | |
| 458 | int MinorKey() { |
| 459 | return DictionaryBits::encode(dictionary_.code()) | |
| 460 | ResultBits::encode(result_.code()) | |
| 461 | IndexBits::encode(index_.code()) | |
| 462 | LookupModeBits::encode(mode_); |
| 463 | } |
| 464 | |
| 465 | class DictionaryBits: public BitField<int, 0, 4> {}; |
| 466 | class ResultBits: public BitField<int, 4, 4> {}; |
| 467 | class IndexBits: public BitField<int, 8, 4> {}; |
| 468 | class LookupModeBits: public BitField<LookupMode, 12, 1> {}; |
| 469 | |
| 470 | Register dictionary_; |
| 471 | Register result_; |
| 472 | Register index_; |
| 473 | LookupMode mode_; |
| 474 | }; |
| 475 | |
| 476 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 477 | class RecordWriteStub: public CodeStub { |
| 478 | public: |
| 479 | RecordWriteStub(Register object, |
| 480 | Register value, |
| 481 | Register address, |
| 482 | RememberedSetAction remembered_set_action, |
| 483 | SaveFPRegsMode fp_mode) |
| 484 | : object_(object), |
| 485 | value_(value), |
| 486 | address_(address), |
| 487 | remembered_set_action_(remembered_set_action), |
| 488 | save_fp_regs_mode_(fp_mode), |
| 489 | regs_(object, // An input reg. |
| 490 | address, // An input reg. |
| 491 | value) { // One scratch reg. |
| 492 | } |
| 493 | |
| 494 | enum Mode { |
| 495 | STORE_BUFFER_ONLY, |
| 496 | INCREMENTAL, |
| 497 | INCREMENTAL_COMPACTION |
| 498 | }; |
| 499 | |
| 500 | virtual bool IsPregenerated(); |
| 501 | static void GenerateFixedRegStubsAheadOfTime(); |
| 502 | virtual bool SometimesSetsUpAFrame() { return false; } |
| 503 | |
| 504 | static const byte kTwoByteNopInstruction = 0x3c; // Cmpb al, #imm8. |
| 505 | static const byte kTwoByteJumpInstruction = 0xeb; // Jmp #imm8. |
| 506 | |
| 507 | static const byte kFiveByteNopInstruction = 0x3d; // Cmpl eax, #imm32. |
| 508 | static const byte kFiveByteJumpInstruction = 0xe9; // Jmp #imm32. |
| 509 | |
| 510 | static Mode GetMode(Code* stub) { |
| 511 | byte first_instruction = stub->instruction_start()[0]; |
| 512 | byte second_instruction = stub->instruction_start()[2]; |
| 513 | |
| 514 | if (first_instruction == kTwoByteJumpInstruction) { |
| 515 | return INCREMENTAL; |
| 516 | } |
| 517 | |
| 518 | ASSERT(first_instruction == kTwoByteNopInstruction); |
| 519 | |
| 520 | if (second_instruction == kFiveByteJumpInstruction) { |
| 521 | return INCREMENTAL_COMPACTION; |
| 522 | } |
| 523 | |
| 524 | ASSERT(second_instruction == kFiveByteNopInstruction); |
| 525 | |
| 526 | return STORE_BUFFER_ONLY; |
| 527 | } |
| 528 | |
| 529 | static void Patch(Code* stub, Mode mode) { |
| 530 | switch (mode) { |
| 531 | case STORE_BUFFER_ONLY: |
| 532 | ASSERT(GetMode(stub) == INCREMENTAL || |
| 533 | GetMode(stub) == INCREMENTAL_COMPACTION); |
| 534 | stub->instruction_start()[0] = kTwoByteNopInstruction; |
| 535 | stub->instruction_start()[2] = kFiveByteNopInstruction; |
| 536 | break; |
| 537 | case INCREMENTAL: |
| 538 | ASSERT(GetMode(stub) == STORE_BUFFER_ONLY); |
| 539 | stub->instruction_start()[0] = kTwoByteJumpInstruction; |
| 540 | break; |
| 541 | case INCREMENTAL_COMPACTION: |
| 542 | ASSERT(GetMode(stub) == STORE_BUFFER_ONLY); |
| 543 | stub->instruction_start()[0] = kTwoByteNopInstruction; |
| 544 | stub->instruction_start()[2] = kFiveByteJumpInstruction; |
| 545 | break; |
| 546 | } |
| 547 | ASSERT(GetMode(stub) == mode); |
| 548 | CPU::FlushICache(stub->instruction_start(), 7); |
| 549 | } |
| 550 | |
| 551 | private: |
| 552 | // This is a helper class for freeing up 3 scratch registers, where the third |
| 553 | // is always rcx (needed for shift operations). The input is two registers |
| 554 | // that must be preserved and one scratch register provided by the caller. |
| 555 | class RegisterAllocation { |
| 556 | public: |
| 557 | RegisterAllocation(Register object, |
| 558 | Register address, |
| 559 | Register scratch0) |
| 560 | : object_orig_(object), |
| 561 | address_orig_(address), |
| 562 | scratch0_orig_(scratch0), |
| 563 | object_(object), |
| 564 | address_(address), |
| 565 | scratch0_(scratch0) { |
| 566 | ASSERT(!AreAliased(scratch0, object, address, no_reg)); |
| 567 | scratch1_ = GetRegThatIsNotRcxOr(object_, address_, scratch0_); |
| 568 | if (scratch0.is(rcx)) { |
| 569 | scratch0_ = GetRegThatIsNotRcxOr(object_, address_, scratch1_); |
| 570 | } |
| 571 | if (object.is(rcx)) { |
| 572 | object_ = GetRegThatIsNotRcxOr(address_, scratch0_, scratch1_); |
| 573 | } |
| 574 | if (address.is(rcx)) { |
| 575 | address_ = GetRegThatIsNotRcxOr(object_, scratch0_, scratch1_); |
| 576 | } |
| 577 | ASSERT(!AreAliased(scratch0_, object_, address_, rcx)); |
| 578 | } |
| 579 | |
| 580 | void Save(MacroAssembler* masm) { |
| 581 | ASSERT(!address_orig_.is(object_)); |
| 582 | ASSERT(object_.is(object_orig_) || address_.is(address_orig_)); |
| 583 | ASSERT(!AreAliased(object_, address_, scratch1_, scratch0_)); |
| 584 | ASSERT(!AreAliased(object_orig_, address_, scratch1_, scratch0_)); |
| 585 | ASSERT(!AreAliased(object_, address_orig_, scratch1_, scratch0_)); |
| 586 | // We don't have to save scratch0_orig_ because it was given to us as |
| 587 | // a scratch register. But if we had to switch to a different reg then |
| 588 | // we should save the new scratch0_. |
| 589 | if (!scratch0_.is(scratch0_orig_)) masm->push(scratch0_); |
| 590 | if (!rcx.is(scratch0_orig_) && |
| 591 | !rcx.is(object_orig_) && |
| 592 | !rcx.is(address_orig_)) { |
| 593 | masm->push(rcx); |
| 594 | } |
| 595 | masm->push(scratch1_); |
| 596 | if (!address_.is(address_orig_)) { |
| 597 | masm->push(address_); |
| 598 | masm->movq(address_, address_orig_); |
| 599 | } |
| 600 | if (!object_.is(object_orig_)) { |
| 601 | masm->push(object_); |
| 602 | masm->movq(object_, object_orig_); |
| 603 | } |
| 604 | } |
| 605 | |
| 606 | void Restore(MacroAssembler* masm) { |
| 607 | // These will have been preserved the entire time, so we just need to move |
| 608 | // them back. Only in one case is the orig_ reg different from the plain |
| 609 | // one, since only one of them can alias with rcx. |
| 610 | if (!object_.is(object_orig_)) { |
| 611 | masm->movq(object_orig_, object_); |
| 612 | masm->pop(object_); |
| 613 | } |
| 614 | if (!address_.is(address_orig_)) { |
| 615 | masm->movq(address_orig_, address_); |
| 616 | masm->pop(address_); |
| 617 | } |
| 618 | masm->pop(scratch1_); |
| 619 | if (!rcx.is(scratch0_orig_) && |
| 620 | !rcx.is(object_orig_) && |
| 621 | !rcx.is(address_orig_)) { |
| 622 | masm->pop(rcx); |
| 623 | } |
| 624 | if (!scratch0_.is(scratch0_orig_)) masm->pop(scratch0_); |
| 625 | } |
| 626 | |
| 627 | // If we have to call into C then we need to save and restore all caller- |
| 628 | // saved registers that were not already preserved. |
| 629 | |
| 630 | // The three scratch registers (incl. rcx) will be restored by other means |
| 631 | // so we don't bother pushing them here. Rbx, rbp and r12-15 are callee |
| 632 | // save and don't need to be preserved. |
| 633 | void SaveCallerSaveRegisters(MacroAssembler* masm, SaveFPRegsMode mode) { |
| 634 | masm->PushCallerSaved(mode, scratch0_, scratch1_, rcx); |
| 635 | } |
| 636 | |
| 637 | inline void RestoreCallerSaveRegisters(MacroAssembler*masm, |
| 638 | SaveFPRegsMode mode) { |
| 639 | masm->PopCallerSaved(mode, scratch0_, scratch1_, rcx); |
| 640 | } |
| 641 | |
| 642 | inline Register object() { return object_; } |
| 643 | inline Register address() { return address_; } |
| 644 | inline Register scratch0() { return scratch0_; } |
| 645 | inline Register scratch1() { return scratch1_; } |
| 646 | |
| 647 | private: |
| 648 | Register object_orig_; |
| 649 | Register address_orig_; |
| 650 | Register scratch0_orig_; |
| 651 | Register object_; |
| 652 | Register address_; |
| 653 | Register scratch0_; |
| 654 | Register scratch1_; |
| 655 | // Third scratch register is always rcx. |
| 656 | |
| 657 | Register GetRegThatIsNotRcxOr(Register r1, |
| 658 | Register r2, |
| 659 | Register r3) { |
| 660 | for (int i = 0; i < Register::kNumAllocatableRegisters; i++) { |
| 661 | Register candidate = Register::FromAllocationIndex(i); |
| 662 | if (candidate.is(rcx)) continue; |
| 663 | if (candidate.is(r1)) continue; |
| 664 | if (candidate.is(r2)) continue; |
| 665 | if (candidate.is(r3)) continue; |
| 666 | return candidate; |
| 667 | } |
| 668 | UNREACHABLE(); |
| 669 | return no_reg; |
| 670 | } |
| 671 | friend class RecordWriteStub; |
| 672 | }; |
| 673 | |
| 674 | enum OnNoNeedToInformIncrementalMarker { |
| 675 | kReturnOnNoNeedToInformIncrementalMarker, |
| 676 | kUpdateRememberedSetOnNoNeedToInformIncrementalMarker |
| 677 | }; |
| 678 | |
| 679 | void Generate(MacroAssembler* masm); |
| 680 | void GenerateIncremental(MacroAssembler* masm, Mode mode); |
| 681 | void CheckNeedsToInformIncrementalMarker( |
| 682 | MacroAssembler* masm, |
| 683 | OnNoNeedToInformIncrementalMarker on_no_need, |
| 684 | Mode mode); |
| 685 | void InformIncrementalMarker(MacroAssembler* masm, Mode mode); |
| 686 | |
| 687 | Major MajorKey() { return RecordWrite; } |
| 688 | |
| 689 | int MinorKey() { |
| 690 | return ObjectBits::encode(object_.code()) | |
| 691 | ValueBits::encode(value_.code()) | |
| 692 | AddressBits::encode(address_.code()) | |
| 693 | RememberedSetActionBits::encode(remembered_set_action_) | |
| 694 | SaveFPRegsModeBits::encode(save_fp_regs_mode_); |
| 695 | } |
| 696 | |
| 697 | void Activate(Code* code) { |
| 698 | code->GetHeap()->incremental_marking()->ActivateGeneratedStub(code); |
| 699 | } |
| 700 | |
| 701 | class ObjectBits: public BitField<int, 0, 4> {}; |
| 702 | class ValueBits: public BitField<int, 4, 4> {}; |
| 703 | class AddressBits: public BitField<int, 8, 4> {}; |
| 704 | class RememberedSetActionBits: public BitField<RememberedSetAction, 12, 1> {}; |
| 705 | class SaveFPRegsModeBits: public BitField<SaveFPRegsMode, 13, 1> {}; |
| 706 | |
| 707 | Register object_; |
| 708 | Register value_; |
| 709 | Register address_; |
| 710 | RememberedSetAction remembered_set_action_; |
| 711 | SaveFPRegsMode save_fp_regs_mode_; |
| 712 | Label slow_; |
| 713 | RegisterAllocation regs_; |
| 714 | }; |
| 715 | |
| 716 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 717 | } } // namespace v8::internal |
| 718 | |
| 719 | #endif // V8_X64_CODE_STUBS_X64_H_ |