Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5 | #ifndef V8_MIPS_CODE_STUBS_MIPS64_H_ |
| 6 | #define V8_MIPS_CODE_STUBS_MIPS64_H_ |
| 7 | |
| 8 | #include "src/mips64/frames-mips64.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 9 | |
| 10 | namespace v8 { |
| 11 | namespace internal { |
| 12 | |
| 13 | |
| 14 | void ArrayNativeCode(MacroAssembler* masm, Label* call_generic_code); |
| 15 | |
| 16 | |
| 17 | class StringHelper : public AllStatic { |
| 18 | public: |
| 19 | // Generate code for copying a large number of characters. This function |
| 20 | // is allowed to spend extra time setting up conditions to make copying |
| 21 | // faster. Copying of overlapping regions is not supported. |
| 22 | // Dest register ends at the position after the last character written. |
| 23 | static void GenerateCopyCharacters(MacroAssembler* masm, |
| 24 | Register dest, |
| 25 | Register src, |
| 26 | Register count, |
| 27 | Register scratch, |
| 28 | String::Encoding encoding); |
| 29 | |
| 30 | // Compares two flat one-byte strings and returns result in v0. |
| 31 | static void GenerateCompareFlatOneByteStrings( |
| 32 | MacroAssembler* masm, Register left, Register right, Register scratch1, |
| 33 | Register scratch2, Register scratch3, Register scratch4); |
| 34 | |
| 35 | // Compares two flat one-byte strings for equality and returns result in v0. |
| 36 | static void GenerateFlatOneByteStringEquals(MacroAssembler* masm, |
| 37 | Register left, Register right, |
| 38 | Register scratch1, |
| 39 | Register scratch2, |
| 40 | Register scratch3); |
| 41 | |
| 42 | private: |
| 43 | static void GenerateOneByteCharsCompareLoop( |
| 44 | MacroAssembler* masm, Register left, Register right, Register length, |
| 45 | Register scratch1, Register scratch2, Register scratch3, |
| 46 | Label* chars_not_equal); |
| 47 | |
| 48 | private: |
| 49 | DISALLOW_IMPLICIT_CONSTRUCTORS(StringHelper); |
| 50 | }; |
| 51 | |
| 52 | |
| 53 | class StoreRegistersStateStub: public PlatformCodeStub { |
| 54 | public: |
| 55 | explicit StoreRegistersStateStub(Isolate* isolate) |
| 56 | : PlatformCodeStub(isolate) {} |
| 57 | |
| 58 | static void GenerateAheadOfTime(Isolate* isolate); |
| 59 | |
| 60 | private: |
| 61 | DEFINE_NULL_CALL_INTERFACE_DESCRIPTOR(); |
| 62 | DEFINE_PLATFORM_CODE_STUB(StoreRegistersState, PlatformCodeStub); |
| 63 | }; |
| 64 | |
| 65 | |
| 66 | class RestoreRegistersStateStub: public PlatformCodeStub { |
| 67 | public: |
| 68 | explicit RestoreRegistersStateStub(Isolate* isolate) |
| 69 | : PlatformCodeStub(isolate) {} |
| 70 | |
| 71 | static void GenerateAheadOfTime(Isolate* isolate); |
| 72 | |
| 73 | private: |
| 74 | DEFINE_NULL_CALL_INTERFACE_DESCRIPTOR(); |
| 75 | DEFINE_PLATFORM_CODE_STUB(RestoreRegistersState, PlatformCodeStub); |
| 76 | }; |
| 77 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 78 | |
| 79 | class RecordWriteStub: public PlatformCodeStub { |
| 80 | public: |
| 81 | RecordWriteStub(Isolate* isolate, |
| 82 | Register object, |
| 83 | Register value, |
| 84 | Register address, |
| 85 | RememberedSetAction remembered_set_action, |
| 86 | SaveFPRegsMode fp_mode) |
| 87 | : PlatformCodeStub(isolate), |
| 88 | regs_(object, // An input reg. |
| 89 | address, // An input reg. |
| 90 | value) { // One scratch reg. |
| 91 | minor_key_ = ObjectBits::encode(object.code()) | |
| 92 | ValueBits::encode(value.code()) | |
| 93 | AddressBits::encode(address.code()) | |
| 94 | RememberedSetActionBits::encode(remembered_set_action) | |
| 95 | SaveFPRegsModeBits::encode(fp_mode); |
| 96 | } |
| 97 | |
| 98 | RecordWriteStub(uint32_t key, Isolate* isolate) |
| 99 | : PlatformCodeStub(key, isolate), regs_(object(), address(), value()) {} |
| 100 | |
| 101 | enum Mode { |
| 102 | STORE_BUFFER_ONLY, |
| 103 | INCREMENTAL, |
| 104 | INCREMENTAL_COMPACTION |
| 105 | }; |
| 106 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 107 | bool SometimesSetsUpAFrame() override { return false; } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 108 | |
| 109 | static void PatchBranchIntoNop(MacroAssembler* masm, int pos) { |
| 110 | const unsigned offset = masm->instr_at(pos) & kImm16Mask; |
| 111 | masm->instr_at_put(pos, BNE | (zero_reg.code() << kRsShift) | |
| 112 | (zero_reg.code() << kRtShift) | (offset & kImm16Mask)); |
| 113 | DCHECK(Assembler::IsBne(masm->instr_at(pos))); |
| 114 | } |
| 115 | |
| 116 | static void PatchNopIntoBranch(MacroAssembler* masm, int pos) { |
| 117 | const unsigned offset = masm->instr_at(pos) & kImm16Mask; |
| 118 | masm->instr_at_put(pos, BEQ | (zero_reg.code() << kRsShift) | |
| 119 | (zero_reg.code() << kRtShift) | (offset & kImm16Mask)); |
| 120 | DCHECK(Assembler::IsBeq(masm->instr_at(pos))); |
| 121 | } |
| 122 | |
| 123 | static Mode GetMode(Code* stub) { |
| 124 | Instr first_instruction = Assembler::instr_at(stub->instruction_start()); |
| 125 | Instr second_instruction = Assembler::instr_at(stub->instruction_start() + |
| 126 | 2 * Assembler::kInstrSize); |
| 127 | |
| 128 | if (Assembler::IsBeq(first_instruction)) { |
| 129 | return INCREMENTAL; |
| 130 | } |
| 131 | |
| 132 | DCHECK(Assembler::IsBne(first_instruction)); |
| 133 | |
| 134 | if (Assembler::IsBeq(second_instruction)) { |
| 135 | return INCREMENTAL_COMPACTION; |
| 136 | } |
| 137 | |
| 138 | DCHECK(Assembler::IsBne(second_instruction)); |
| 139 | |
| 140 | return STORE_BUFFER_ONLY; |
| 141 | } |
| 142 | |
| 143 | static void Patch(Code* stub, Mode mode) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 144 | MacroAssembler masm(stub->GetIsolate(), stub->instruction_start(), |
| 145 | stub->instruction_size(), CodeObjectRequired::kNo); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 146 | switch (mode) { |
| 147 | case STORE_BUFFER_ONLY: |
| 148 | DCHECK(GetMode(stub) == INCREMENTAL || |
| 149 | GetMode(stub) == INCREMENTAL_COMPACTION); |
| 150 | PatchBranchIntoNop(&masm, 0); |
| 151 | PatchBranchIntoNop(&masm, 2 * Assembler::kInstrSize); |
| 152 | break; |
| 153 | case INCREMENTAL: |
| 154 | DCHECK(GetMode(stub) == STORE_BUFFER_ONLY); |
| 155 | PatchNopIntoBranch(&masm, 0); |
| 156 | break; |
| 157 | case INCREMENTAL_COMPACTION: |
| 158 | DCHECK(GetMode(stub) == STORE_BUFFER_ONLY); |
| 159 | PatchNopIntoBranch(&masm, 2 * Assembler::kInstrSize); |
| 160 | break; |
| 161 | } |
| 162 | DCHECK(GetMode(stub) == mode); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 163 | Assembler::FlushICache(stub->GetIsolate(), stub->instruction_start(), |
| 164 | 4 * Assembler::kInstrSize); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 165 | } |
| 166 | |
| 167 | DEFINE_NULL_CALL_INTERFACE_DESCRIPTOR(); |
| 168 | |
| 169 | private: |
| 170 | // This is a helper class for freeing up 3 scratch registers. The input is |
| 171 | // two registers that must be preserved and one scratch register provided by |
| 172 | // the caller. |
| 173 | class RegisterAllocation { |
| 174 | public: |
| 175 | RegisterAllocation(Register object, |
| 176 | Register address, |
| 177 | Register scratch0) |
| 178 | : object_(object), |
| 179 | address_(address), |
| 180 | scratch0_(scratch0) { |
| 181 | DCHECK(!AreAliased(scratch0, object, address, no_reg)); |
| 182 | scratch1_ = GetRegisterThatIsNotOneOf(object_, address_, scratch0_); |
| 183 | } |
| 184 | |
| 185 | void Save(MacroAssembler* masm) { |
| 186 | DCHECK(!AreAliased(object_, address_, scratch1_, scratch0_)); |
| 187 | // We don't have to save scratch0_ because it was given to us as |
| 188 | // a scratch register. |
| 189 | masm->push(scratch1_); |
| 190 | } |
| 191 | |
| 192 | void Restore(MacroAssembler* masm) { |
| 193 | masm->pop(scratch1_); |
| 194 | } |
| 195 | |
| 196 | // If we have to call into C then we need to save and restore all caller- |
| 197 | // saved registers that were not already preserved. The scratch registers |
| 198 | // will be restored by other means so we don't bother pushing them here. |
| 199 | void SaveCallerSaveRegisters(MacroAssembler* masm, SaveFPRegsMode mode) { |
| 200 | masm->MultiPush((kJSCallerSaved | ra.bit()) & ~scratch1_.bit()); |
| 201 | if (mode == kSaveFPRegs) { |
| 202 | masm->MultiPushFPU(kCallerSavedFPU); |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | inline void RestoreCallerSaveRegisters(MacroAssembler*masm, |
| 207 | SaveFPRegsMode mode) { |
| 208 | if (mode == kSaveFPRegs) { |
| 209 | masm->MultiPopFPU(kCallerSavedFPU); |
| 210 | } |
| 211 | masm->MultiPop((kJSCallerSaved | ra.bit()) & ~scratch1_.bit()); |
| 212 | } |
| 213 | |
| 214 | inline Register object() { return object_; } |
| 215 | inline Register address() { return address_; } |
| 216 | inline Register scratch0() { return scratch0_; } |
| 217 | inline Register scratch1() { return scratch1_; } |
| 218 | |
| 219 | private: |
| 220 | Register object_; |
| 221 | Register address_; |
| 222 | Register scratch0_; |
| 223 | Register scratch1_; |
| 224 | |
| 225 | friend class RecordWriteStub; |
| 226 | }; |
| 227 | |
| 228 | enum OnNoNeedToInformIncrementalMarker { |
| 229 | kReturnOnNoNeedToInformIncrementalMarker, |
| 230 | kUpdateRememberedSetOnNoNeedToInformIncrementalMarker |
| 231 | }; |
| 232 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 233 | inline Major MajorKey() const final { return RecordWrite; } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 234 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 235 | void Generate(MacroAssembler* masm) override; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 236 | void GenerateIncremental(MacroAssembler* masm, Mode mode); |
| 237 | void CheckNeedsToInformIncrementalMarker( |
| 238 | MacroAssembler* masm, |
| 239 | OnNoNeedToInformIncrementalMarker on_no_need, |
| 240 | Mode mode); |
| 241 | void InformIncrementalMarker(MacroAssembler* masm); |
| 242 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 243 | void Activate(Code* code) override { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 244 | code->GetHeap()->incremental_marking()->ActivateGeneratedStub(code); |
| 245 | } |
| 246 | |
| 247 | Register object() const { |
| 248 | return Register::from_code(ObjectBits::decode(minor_key_)); |
| 249 | } |
| 250 | |
| 251 | Register value() const { |
| 252 | return Register::from_code(ValueBits::decode(minor_key_)); |
| 253 | } |
| 254 | |
| 255 | Register address() const { |
| 256 | return Register::from_code(AddressBits::decode(minor_key_)); |
| 257 | } |
| 258 | |
| 259 | RememberedSetAction remembered_set_action() const { |
| 260 | return RememberedSetActionBits::decode(minor_key_); |
| 261 | } |
| 262 | |
| 263 | SaveFPRegsMode save_fp_regs_mode() const { |
| 264 | return SaveFPRegsModeBits::decode(minor_key_); |
| 265 | } |
| 266 | |
| 267 | class ObjectBits: public BitField<int, 0, 5> {}; |
| 268 | class ValueBits: public BitField<int, 5, 5> {}; |
| 269 | class AddressBits: public BitField<int, 10, 5> {}; |
| 270 | class RememberedSetActionBits: public BitField<RememberedSetAction, 15, 1> {}; |
| 271 | class SaveFPRegsModeBits: public BitField<SaveFPRegsMode, 16, 1> {}; |
| 272 | |
| 273 | Label slow_; |
| 274 | RegisterAllocation regs_; |
| 275 | |
| 276 | DISALLOW_COPY_AND_ASSIGN(RecordWriteStub); |
| 277 | }; |
| 278 | |
| 279 | |
| 280 | // Trampoline stub to call into native code. To call safely into native code |
| 281 | // in the presence of compacting GC (which can move code objects) we need to |
| 282 | // keep the code which called into native pinned in the memory. Currently the |
| 283 | // simplest approach is to generate such stub early enough so it can never be |
| 284 | // moved by GC |
| 285 | class DirectCEntryStub: public PlatformCodeStub { |
| 286 | public: |
| 287 | explicit DirectCEntryStub(Isolate* isolate) : PlatformCodeStub(isolate) {} |
| 288 | void GenerateCall(MacroAssembler* masm, Register target); |
| 289 | |
| 290 | private: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 291 | bool NeedsImmovableCode() override { return true; } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 292 | |
| 293 | DEFINE_NULL_CALL_INTERFACE_DESCRIPTOR(); |
| 294 | DEFINE_PLATFORM_CODE_STUB(DirectCEntry, PlatformCodeStub); |
| 295 | }; |
| 296 | |
| 297 | |
| 298 | class NameDictionaryLookupStub: public PlatformCodeStub { |
| 299 | public: |
| 300 | enum LookupMode { POSITIVE_LOOKUP, NEGATIVE_LOOKUP }; |
| 301 | |
| 302 | NameDictionaryLookupStub(Isolate* isolate, LookupMode mode) |
| 303 | : PlatformCodeStub(isolate) { |
| 304 | minor_key_ = LookupModeBits::encode(mode); |
| 305 | } |
| 306 | |
| 307 | static void GenerateNegativeLookup(MacroAssembler* masm, |
| 308 | Label* miss, |
| 309 | Label* done, |
| 310 | Register receiver, |
| 311 | Register properties, |
| 312 | Handle<Name> name, |
| 313 | Register scratch0); |
| 314 | |
| 315 | static void GeneratePositiveLookup(MacroAssembler* masm, |
| 316 | Label* miss, |
| 317 | Label* done, |
| 318 | Register elements, |
| 319 | Register name, |
| 320 | Register r0, |
| 321 | Register r1); |
| 322 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 323 | bool SometimesSetsUpAFrame() override { return false; } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 324 | |
| 325 | private: |
| 326 | static const int kInlinedProbes = 4; |
| 327 | static const int kTotalProbes = 20; |
| 328 | |
| 329 | static const int kCapacityOffset = |
| 330 | NameDictionary::kHeaderSize + |
| 331 | NameDictionary::kCapacityIndex * kPointerSize; |
| 332 | |
| 333 | static const int kElementsStartOffset = |
| 334 | NameDictionary::kHeaderSize + |
| 335 | NameDictionary::kElementsStartIndex * kPointerSize; |
| 336 | |
| 337 | LookupMode mode() const { return LookupModeBits::decode(minor_key_); } |
| 338 | |
| 339 | class LookupModeBits: public BitField<LookupMode, 0, 1> {}; |
| 340 | |
| 341 | DEFINE_NULL_CALL_INTERFACE_DESCRIPTOR(); |
| 342 | DEFINE_PLATFORM_CODE_STUB(NameDictionaryLookup, PlatformCodeStub); |
| 343 | }; |
| 344 | |
| 345 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 346 | } // namespace internal |
| 347 | } // namespace v8 |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 348 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 349 | #endif // V8_MIPS_CODE_STUBS_MIPS64_H_ |