Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4 | |
| 5 | #ifndef V8_X64_CODE_STUBS_X64_H_ |
| 6 | #define V8_X64_CODE_STUBS_X64_H_ |
| 7 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 8 | namespace v8 { |
| 9 | namespace internal { |
| 10 | |
| 11 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 12 | void ArrayNativeCode(MacroAssembler* masm, Label* call_generic_code); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 13 | |
| 14 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 15 | class StringHelper : public AllStatic { |
| 16 | public: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 17 | // Generate code for copying characters using the rep movs instruction. |
| 18 | // Copies rcx characters from rsi to rdi. Copying of overlapping regions is |
| 19 | // not supported. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 20 | static void GenerateCopyCharacters(MacroAssembler* masm, |
| 21 | Register dest, |
| 22 | Register src, |
| 23 | Register count, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 24 | String::Encoding encoding); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 25 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 26 | // Compares two flat one-byte strings and returns result in rax. |
| 27 | static void GenerateCompareFlatOneByteStrings( |
| 28 | MacroAssembler* masm, Register left, Register right, Register scratch1, |
| 29 | Register scratch2, Register scratch3, Register scratch4); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 30 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 31 | // Compares two flat one-byte strings for equality and returns result in rax. |
| 32 | static void GenerateFlatOneByteStringEquals(MacroAssembler* masm, |
| 33 | Register left, Register right, |
| 34 | Register scratch1, |
| 35 | Register scratch2); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 36 | |
| 37 | private: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 38 | static void GenerateOneByteCharsCompareLoop( |
| 39 | MacroAssembler* masm, Register left, Register right, Register length, |
| 40 | Register scratch, Label* chars_not_equal, |
| 41 | Label::Distance near_jump = Label::kFar); |
| 42 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 43 | DISALLOW_IMPLICIT_CONSTRUCTORS(StringHelper); |
| 44 | }; |
| 45 | |
| 46 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 47 | class NameDictionaryLookupStub: public PlatformCodeStub { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 48 | public: |
| 49 | enum LookupMode { POSITIVE_LOOKUP, NEGATIVE_LOOKUP }; |
| 50 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 51 | NameDictionaryLookupStub(Isolate* isolate, Register dictionary, |
| 52 | Register result, Register index, LookupMode mode) |
| 53 | : PlatformCodeStub(isolate) { |
| 54 | minor_key_ = DictionaryBits::encode(dictionary.code()) | |
| 55 | ResultBits::encode(result.code()) | |
| 56 | IndexBits::encode(index.code()) | LookupModeBits::encode(mode); |
| 57 | } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 58 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 59 | static void GenerateNegativeLookup(MacroAssembler* masm, |
| 60 | Label* miss, |
| 61 | Label* done, |
| 62 | Register properties, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 63 | Handle<Name> name, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 64 | Register r0); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 65 | |
| 66 | static void GeneratePositiveLookup(MacroAssembler* masm, |
| 67 | Label* miss, |
| 68 | Label* done, |
| 69 | Register elements, |
| 70 | Register name, |
| 71 | Register r0, |
| 72 | Register r1); |
| 73 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 74 | bool SometimesSetsUpAFrame() override { return false; } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 75 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 76 | private: |
| 77 | static const int kInlinedProbes = 4; |
| 78 | static const int kTotalProbes = 20; |
| 79 | |
| 80 | static const int kCapacityOffset = |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 81 | NameDictionary::kHeaderSize + |
| 82 | NameDictionary::kCapacityIndex * kPointerSize; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 83 | |
| 84 | static const int kElementsStartOffset = |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 85 | NameDictionary::kHeaderSize + |
| 86 | NameDictionary::kElementsStartIndex * kPointerSize; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 87 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 88 | Register dictionary() const { |
| 89 | return Register::from_code(DictionaryBits::decode(minor_key_)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 90 | } |
| 91 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 92 | Register result() const { |
| 93 | return Register::from_code(ResultBits::decode(minor_key_)); |
| 94 | } |
| 95 | |
| 96 | Register index() const { |
| 97 | return Register::from_code(IndexBits::decode(minor_key_)); |
| 98 | } |
| 99 | |
| 100 | LookupMode mode() const { return LookupModeBits::decode(minor_key_); } |
| 101 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 102 | class DictionaryBits: public BitField<int, 0, 4> {}; |
| 103 | class ResultBits: public BitField<int, 4, 4> {}; |
| 104 | class IndexBits: public BitField<int, 8, 4> {}; |
| 105 | class LookupModeBits: public BitField<LookupMode, 12, 1> {}; |
| 106 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 107 | DEFINE_NULL_CALL_INTERFACE_DESCRIPTOR(); |
| 108 | DEFINE_PLATFORM_CODE_STUB(NameDictionaryLookup, PlatformCodeStub); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 109 | }; |
| 110 | |
| 111 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 112 | class RecordWriteStub: public PlatformCodeStub { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 113 | public: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 114 | RecordWriteStub(Isolate* isolate, Register object, Register value, |
| 115 | Register address, RememberedSetAction remembered_set_action, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 116 | SaveFPRegsMode fp_mode) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 117 | : PlatformCodeStub(isolate), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 118 | regs_(object, // An input reg. |
| 119 | address, // An input reg. |
| 120 | value) { // One scratch reg. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 121 | minor_key_ = ObjectBits::encode(object.code()) | |
| 122 | ValueBits::encode(value.code()) | |
| 123 | AddressBits::encode(address.code()) | |
| 124 | RememberedSetActionBits::encode(remembered_set_action) | |
| 125 | SaveFPRegsModeBits::encode(fp_mode); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 126 | } |
| 127 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 128 | RecordWriteStub(uint32_t key, Isolate* isolate) |
| 129 | : PlatformCodeStub(key, isolate), regs_(object(), address(), value()) {} |
| 130 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 131 | enum Mode { |
| 132 | STORE_BUFFER_ONLY, |
| 133 | INCREMENTAL, |
| 134 | INCREMENTAL_COMPACTION |
| 135 | }; |
| 136 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 137 | bool SometimesSetsUpAFrame() override { return false; } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 138 | |
| 139 | static const byte kTwoByteNopInstruction = 0x3c; // Cmpb al, #imm8. |
| 140 | static const byte kTwoByteJumpInstruction = 0xeb; // Jmp #imm8. |
| 141 | |
| 142 | static const byte kFiveByteNopInstruction = 0x3d; // Cmpl eax, #imm32. |
| 143 | static const byte kFiveByteJumpInstruction = 0xe9; // Jmp #imm32. |
| 144 | |
| 145 | static Mode GetMode(Code* stub) { |
| 146 | byte first_instruction = stub->instruction_start()[0]; |
| 147 | byte second_instruction = stub->instruction_start()[2]; |
| 148 | |
| 149 | if (first_instruction == kTwoByteJumpInstruction) { |
| 150 | return INCREMENTAL; |
| 151 | } |
| 152 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 153 | DCHECK(first_instruction == kTwoByteNopInstruction); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 154 | |
| 155 | if (second_instruction == kFiveByteJumpInstruction) { |
| 156 | return INCREMENTAL_COMPACTION; |
| 157 | } |
| 158 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 159 | DCHECK(second_instruction == kFiveByteNopInstruction); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 160 | |
| 161 | return STORE_BUFFER_ONLY; |
| 162 | } |
| 163 | |
| 164 | static void Patch(Code* stub, Mode mode) { |
| 165 | switch (mode) { |
| 166 | case STORE_BUFFER_ONLY: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 167 | DCHECK(GetMode(stub) == INCREMENTAL || |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 168 | GetMode(stub) == INCREMENTAL_COMPACTION); |
| 169 | stub->instruction_start()[0] = kTwoByteNopInstruction; |
| 170 | stub->instruction_start()[2] = kFiveByteNopInstruction; |
| 171 | break; |
| 172 | case INCREMENTAL: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 173 | DCHECK(GetMode(stub) == STORE_BUFFER_ONLY); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 174 | stub->instruction_start()[0] = kTwoByteJumpInstruction; |
| 175 | break; |
| 176 | case INCREMENTAL_COMPACTION: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 177 | DCHECK(GetMode(stub) == STORE_BUFFER_ONLY); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 178 | stub->instruction_start()[0] = kTwoByteNopInstruction; |
| 179 | stub->instruction_start()[2] = kFiveByteJumpInstruction; |
| 180 | break; |
| 181 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 182 | DCHECK(GetMode(stub) == mode); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 183 | Assembler::FlushICache(stub->GetIsolate(), stub->instruction_start(), 7); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 184 | } |
| 185 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 186 | DEFINE_NULL_CALL_INTERFACE_DESCRIPTOR(); |
| 187 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 188 | private: |
| 189 | // This is a helper class for freeing up 3 scratch registers, where the third |
| 190 | // is always rcx (needed for shift operations). The input is two registers |
| 191 | // that must be preserved and one scratch register provided by the caller. |
| 192 | class RegisterAllocation { |
| 193 | public: |
| 194 | RegisterAllocation(Register object, |
| 195 | Register address, |
| 196 | Register scratch0) |
| 197 | : object_orig_(object), |
| 198 | address_orig_(address), |
| 199 | scratch0_orig_(scratch0), |
| 200 | object_(object), |
| 201 | address_(address), |
| 202 | scratch0_(scratch0) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 203 | DCHECK(!AreAliased(scratch0, object, address, no_reg)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 204 | scratch1_ = GetRegThatIsNotRcxOr(object_, address_, scratch0_); |
| 205 | if (scratch0.is(rcx)) { |
| 206 | scratch0_ = GetRegThatIsNotRcxOr(object_, address_, scratch1_); |
| 207 | } |
| 208 | if (object.is(rcx)) { |
| 209 | object_ = GetRegThatIsNotRcxOr(address_, scratch0_, scratch1_); |
| 210 | } |
| 211 | if (address.is(rcx)) { |
| 212 | address_ = GetRegThatIsNotRcxOr(object_, scratch0_, scratch1_); |
| 213 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 214 | DCHECK(!AreAliased(scratch0_, object_, address_, rcx)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | void Save(MacroAssembler* masm) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 218 | DCHECK(!address_orig_.is(object_)); |
| 219 | DCHECK(object_.is(object_orig_) || address_.is(address_orig_)); |
| 220 | DCHECK(!AreAliased(object_, address_, scratch1_, scratch0_)); |
| 221 | DCHECK(!AreAliased(object_orig_, address_, scratch1_, scratch0_)); |
| 222 | DCHECK(!AreAliased(object_, address_orig_, scratch1_, scratch0_)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 223 | // We don't have to save scratch0_orig_ because it was given to us as |
| 224 | // a scratch register. But if we had to switch to a different reg then |
| 225 | // we should save the new scratch0_. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 226 | if (!scratch0_.is(scratch0_orig_)) masm->Push(scratch0_); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 227 | if (!rcx.is(scratch0_orig_) && |
| 228 | !rcx.is(object_orig_) && |
| 229 | !rcx.is(address_orig_)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 230 | masm->Push(rcx); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 231 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 232 | masm->Push(scratch1_); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 233 | if (!address_.is(address_orig_)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 234 | masm->Push(address_); |
| 235 | masm->movp(address_, address_orig_); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 236 | } |
| 237 | if (!object_.is(object_orig_)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 238 | masm->Push(object_); |
| 239 | masm->movp(object_, object_orig_); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 240 | } |
| 241 | } |
| 242 | |
| 243 | void Restore(MacroAssembler* masm) { |
| 244 | // These will have been preserved the entire time, so we just need to move |
| 245 | // them back. Only in one case is the orig_ reg different from the plain |
| 246 | // one, since only one of them can alias with rcx. |
| 247 | if (!object_.is(object_orig_)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 248 | masm->movp(object_orig_, object_); |
| 249 | masm->Pop(object_); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 250 | } |
| 251 | if (!address_.is(address_orig_)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 252 | masm->movp(address_orig_, address_); |
| 253 | masm->Pop(address_); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 254 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 255 | masm->Pop(scratch1_); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 256 | if (!rcx.is(scratch0_orig_) && |
| 257 | !rcx.is(object_orig_) && |
| 258 | !rcx.is(address_orig_)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 259 | masm->Pop(rcx); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 260 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 261 | if (!scratch0_.is(scratch0_orig_)) masm->Pop(scratch0_); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 262 | } |
| 263 | |
| 264 | // If we have to call into C then we need to save and restore all caller- |
| 265 | // saved registers that were not already preserved. |
| 266 | |
| 267 | // The three scratch registers (incl. rcx) will be restored by other means |
| 268 | // so we don't bother pushing them here. Rbx, rbp and r12-15 are callee |
| 269 | // save and don't need to be preserved. |
| 270 | void SaveCallerSaveRegisters(MacroAssembler* masm, SaveFPRegsMode mode) { |
| 271 | masm->PushCallerSaved(mode, scratch0_, scratch1_, rcx); |
| 272 | } |
| 273 | |
| 274 | inline void RestoreCallerSaveRegisters(MacroAssembler*masm, |
| 275 | SaveFPRegsMode mode) { |
| 276 | masm->PopCallerSaved(mode, scratch0_, scratch1_, rcx); |
| 277 | } |
| 278 | |
| 279 | inline Register object() { return object_; } |
| 280 | inline Register address() { return address_; } |
| 281 | inline Register scratch0() { return scratch0_; } |
| 282 | inline Register scratch1() { return scratch1_; } |
| 283 | |
| 284 | private: |
| 285 | Register object_orig_; |
| 286 | Register address_orig_; |
| 287 | Register scratch0_orig_; |
| 288 | Register object_; |
| 289 | Register address_; |
| 290 | Register scratch0_; |
| 291 | Register scratch1_; |
| 292 | // Third scratch register is always rcx. |
| 293 | |
| 294 | Register GetRegThatIsNotRcxOr(Register r1, |
| 295 | Register r2, |
| 296 | Register r3) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 297 | for (int i = 0; i < Register::kNumRegisters; i++) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 298 | if (RegisterConfiguration::Crankshaft()->IsAllocatableGeneralCode(i)) { |
| 299 | Register candidate = Register::from_code(i); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 300 | if (candidate.is(rcx)) continue; |
| 301 | if (candidate.is(r1)) continue; |
| 302 | if (candidate.is(r2)) continue; |
| 303 | if (candidate.is(r3)) continue; |
| 304 | return candidate; |
| 305 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 306 | } |
| 307 | UNREACHABLE(); |
| 308 | return no_reg; |
| 309 | } |
| 310 | friend class RecordWriteStub; |
| 311 | }; |
| 312 | |
| 313 | enum OnNoNeedToInformIncrementalMarker { |
| 314 | kReturnOnNoNeedToInformIncrementalMarker, |
| 315 | kUpdateRememberedSetOnNoNeedToInformIncrementalMarker |
| 316 | }; |
| 317 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 318 | Major MajorKey() const final { return RecordWrite; } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 319 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 320 | void Generate(MacroAssembler* masm) override; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 321 | void GenerateIncremental(MacroAssembler* masm, Mode mode); |
| 322 | void CheckNeedsToInformIncrementalMarker( |
| 323 | MacroAssembler* masm, |
| 324 | OnNoNeedToInformIncrementalMarker on_no_need, |
| 325 | Mode mode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 326 | void InformIncrementalMarker(MacroAssembler* masm); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 327 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 328 | void Activate(Code* code) override { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 329 | code->GetHeap()->incremental_marking()->ActivateGeneratedStub(code); |
| 330 | } |
| 331 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 332 | Register object() const { |
| 333 | return Register::from_code(ObjectBits::decode(minor_key_)); |
| 334 | } |
| 335 | |
| 336 | Register value() const { |
| 337 | return Register::from_code(ValueBits::decode(minor_key_)); |
| 338 | } |
| 339 | |
| 340 | Register address() const { |
| 341 | return Register::from_code(AddressBits::decode(minor_key_)); |
| 342 | } |
| 343 | |
| 344 | RememberedSetAction remembered_set_action() const { |
| 345 | return RememberedSetActionBits::decode(minor_key_); |
| 346 | } |
| 347 | |
| 348 | SaveFPRegsMode save_fp_regs_mode() const { |
| 349 | return SaveFPRegsModeBits::decode(minor_key_); |
| 350 | } |
| 351 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 352 | class ObjectBits: public BitField<int, 0, 4> {}; |
| 353 | class ValueBits: public BitField<int, 4, 4> {}; |
| 354 | class AddressBits: public BitField<int, 8, 4> {}; |
| 355 | class RememberedSetActionBits: public BitField<RememberedSetAction, 12, 1> {}; |
| 356 | class SaveFPRegsModeBits: public BitField<SaveFPRegsMode, 13, 1> {}; |
| 357 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 358 | Label slow_; |
| 359 | RegisterAllocation regs_; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 360 | |
| 361 | DISALLOW_COPY_AND_ASSIGN(RecordWriteStub); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 362 | }; |
| 363 | |
| 364 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 365 | } // namespace internal |
| 366 | } // namespace v8 |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 367 | |
| 368 | #endif // V8_X64_CODE_STUBS_X64_H_ |