Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2012 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 | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5 | #if V8_TARGET_ARCH_ARM |
| 6 | |
| 7 | #include "src/codegen.h" |
| 8 | #include "src/ic/ic.h" |
| 9 | #include "src/ic/ic-compiler.h" |
| 10 | #include "src/ic/stub-cache.h" |
| 11 | |
| 12 | namespace v8 { |
| 13 | namespace internal { |
| 14 | |
| 15 | |
| 16 | // ---------------------------------------------------------------------------- |
| 17 | // Static IC stub generators. |
| 18 | // |
| 19 | |
| 20 | #define __ ACCESS_MASM(masm) |
| 21 | |
| 22 | |
| 23 | static void GenerateGlobalInstanceTypeCheck(MacroAssembler* masm, Register type, |
| 24 | Label* global_object) { |
| 25 | // Register usage: |
| 26 | // type: holds the receiver instance type on entry. |
| 27 | __ cmp(type, Operand(JS_GLOBAL_OBJECT_TYPE)); |
| 28 | __ b(eq, global_object); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 29 | __ cmp(type, Operand(JS_GLOBAL_PROXY_TYPE)); |
| 30 | __ b(eq, global_object); |
| 31 | } |
| 32 | |
| 33 | |
| 34 | // Helper function used from LoadIC GenerateNormal. |
| 35 | // |
| 36 | // elements: Property dictionary. It is not clobbered if a jump to the miss |
| 37 | // label is done. |
| 38 | // name: Property name. It is not clobbered if a jump to the miss label is |
| 39 | // done |
| 40 | // result: Register for the result. It is only updated if a jump to the miss |
| 41 | // label is not done. Can be the same as elements or name clobbering |
| 42 | // one of these in the case of not jumping to the miss label. |
| 43 | // The two scratch registers need to be different from elements, name and |
| 44 | // result. |
| 45 | // The generated code assumes that the receiver has slow properties, |
| 46 | // is not a global object and does not have interceptors. |
| 47 | static void GenerateDictionaryLoad(MacroAssembler* masm, Label* miss, |
| 48 | Register elements, Register name, |
| 49 | Register result, Register scratch1, |
| 50 | Register scratch2) { |
| 51 | // Main use of the scratch registers. |
| 52 | // scratch1: Used as temporary and to hold the capacity of the property |
| 53 | // dictionary. |
| 54 | // scratch2: Used as temporary. |
| 55 | Label done; |
| 56 | |
| 57 | // Probe the dictionary. |
| 58 | NameDictionaryLookupStub::GeneratePositiveLookup(masm, miss, &done, elements, |
| 59 | name, scratch1, scratch2); |
| 60 | |
| 61 | // If probing finds an entry check that the value is a normal |
| 62 | // property. |
| 63 | __ bind(&done); // scratch2 == elements + 4 * index |
| 64 | const int kElementsStartOffset = |
| 65 | NameDictionary::kHeaderSize + |
| 66 | NameDictionary::kElementsStartIndex * kPointerSize; |
| 67 | const int kDetailsOffset = kElementsStartOffset + 2 * kPointerSize; |
| 68 | __ ldr(scratch1, FieldMemOperand(scratch2, kDetailsOffset)); |
| 69 | __ tst(scratch1, Operand(PropertyDetails::TypeField::kMask << kSmiTagSize)); |
| 70 | __ b(ne, miss); |
| 71 | |
| 72 | // Get the value at the masked, scaled index and return. |
| 73 | __ ldr(result, |
| 74 | FieldMemOperand(scratch2, kElementsStartOffset + 1 * kPointerSize)); |
| 75 | } |
| 76 | |
| 77 | |
| 78 | // Helper function used from StoreIC::GenerateNormal. |
| 79 | // |
| 80 | // elements: Property dictionary. It is not clobbered if a jump to the miss |
| 81 | // label is done. |
| 82 | // name: Property name. It is not clobbered if a jump to the miss label is |
| 83 | // done |
| 84 | // value: The value to store. |
| 85 | // The two scratch registers need to be different from elements, name and |
| 86 | // result. |
| 87 | // The generated code assumes that the receiver has slow properties, |
| 88 | // is not a global object and does not have interceptors. |
| 89 | static void GenerateDictionaryStore(MacroAssembler* masm, Label* miss, |
| 90 | Register elements, Register name, |
| 91 | Register value, Register scratch1, |
| 92 | Register scratch2) { |
| 93 | // Main use of the scratch registers. |
| 94 | // scratch1: Used as temporary and to hold the capacity of the property |
| 95 | // dictionary. |
| 96 | // scratch2: Used as temporary. |
| 97 | Label done; |
| 98 | |
| 99 | // Probe the dictionary. |
| 100 | NameDictionaryLookupStub::GeneratePositiveLookup(masm, miss, &done, elements, |
| 101 | name, scratch1, scratch2); |
| 102 | |
| 103 | // If probing finds an entry in the dictionary check that the value |
| 104 | // is a normal property that is not read only. |
| 105 | __ bind(&done); // scratch2 == elements + 4 * index |
| 106 | const int kElementsStartOffset = |
| 107 | NameDictionary::kHeaderSize + |
| 108 | NameDictionary::kElementsStartIndex * kPointerSize; |
| 109 | const int kDetailsOffset = kElementsStartOffset + 2 * kPointerSize; |
| 110 | const int kTypeAndReadOnlyMask = |
| 111 | (PropertyDetails::TypeField::kMask | |
| 112 | PropertyDetails::AttributesField::encode(READ_ONLY)) |
| 113 | << kSmiTagSize; |
| 114 | __ ldr(scratch1, FieldMemOperand(scratch2, kDetailsOffset)); |
| 115 | __ tst(scratch1, Operand(kTypeAndReadOnlyMask)); |
| 116 | __ b(ne, miss); |
| 117 | |
| 118 | // Store the value at the masked, scaled index and return. |
| 119 | const int kValueOffset = kElementsStartOffset + kPointerSize; |
| 120 | __ add(scratch2, scratch2, Operand(kValueOffset - kHeapObjectTag)); |
| 121 | __ str(value, MemOperand(scratch2)); |
| 122 | |
| 123 | // Update the write barrier. Make sure not to clobber the value. |
| 124 | __ mov(scratch1, value); |
| 125 | __ RecordWrite(elements, scratch2, scratch1, kLRHasNotBeenSaved, |
| 126 | kDontSaveFPRegs); |
| 127 | } |
| 128 | |
| 129 | |
| 130 | // Checks the receiver for special cases (value type, slow case bits). |
| 131 | // Falls through for regular JS object. |
| 132 | static void GenerateKeyedLoadReceiverCheck(MacroAssembler* masm, |
| 133 | Register receiver, Register map, |
| 134 | Register scratch, |
| 135 | int interceptor_bit, Label* slow) { |
| 136 | // Check that the object isn't a smi. |
| 137 | __ JumpIfSmi(receiver, slow); |
| 138 | // Get the map of the receiver. |
| 139 | __ ldr(map, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| 140 | // Check bit field. |
| 141 | __ ldrb(scratch, FieldMemOperand(map, Map::kBitFieldOffset)); |
| 142 | __ tst(scratch, |
| 143 | Operand((1 << Map::kIsAccessCheckNeeded) | (1 << interceptor_bit))); |
| 144 | __ b(ne, slow); |
| 145 | // Check that the object is some kind of JS object EXCEPT JS Value type. |
| 146 | // In the case that the object is a value-wrapper object, |
| 147 | // we enter the runtime system to make sure that indexing into string |
| 148 | // objects work as intended. |
| 149 | DCHECK(JS_OBJECT_TYPE > JS_VALUE_TYPE); |
| 150 | __ ldrb(scratch, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| 151 | __ cmp(scratch, Operand(JS_OBJECT_TYPE)); |
| 152 | __ b(lt, slow); |
| 153 | } |
| 154 | |
| 155 | |
| 156 | // Loads an indexed element from a fast case array. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 157 | static void GenerateFastArrayLoad(MacroAssembler* masm, Register receiver, |
| 158 | Register key, Register elements, |
| 159 | Register scratch1, Register scratch2, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 160 | Register result, Label* slow, |
| 161 | LanguageMode language_mode) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 162 | // Register use: |
| 163 | // |
| 164 | // receiver - holds the receiver on entry. |
| 165 | // Unchanged unless 'result' is the same register. |
| 166 | // |
| 167 | // key - holds the smi key on entry. |
| 168 | // Unchanged unless 'result' is the same register. |
| 169 | // |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 170 | // result - holds the result on exit if the load succeeded. |
| 171 | // Allowed to be the the same as 'receiver' or 'key'. |
| 172 | // Unchanged on bailout so 'receiver' and 'key' can be safely |
| 173 | // used by further computation. |
| 174 | // |
| 175 | // Scratch registers: |
| 176 | // |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 177 | // elements - holds the elements of the receiver and its prototypes. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 178 | // |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 179 | // scratch1 - used to hold elements length, bit fields, base addresses. |
| 180 | // |
| 181 | // scratch2 - used to hold maps, prototypes, and the loaded value. |
| 182 | Label check_prototypes, check_next_prototype; |
| 183 | Label done, in_bounds, absent; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 184 | |
| 185 | __ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 186 | __ AssertFastElements(elements); |
| 187 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 188 | // Check that the key (index) is within bounds. |
| 189 | __ ldr(scratch1, FieldMemOperand(elements, FixedArray::kLengthOffset)); |
| 190 | __ cmp(key, Operand(scratch1)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 191 | __ b(lo, &in_bounds); |
| 192 | // Out-of-bounds. Check the prototype chain to see if we can just return |
| 193 | // 'undefined'. |
| 194 | __ cmp(key, Operand(0)); |
| 195 | __ b(lt, slow); // Negative keys can't take the fast OOB path. |
| 196 | __ bind(&check_prototypes); |
| 197 | __ ldr(scratch2, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| 198 | __ bind(&check_next_prototype); |
| 199 | __ ldr(scratch2, FieldMemOperand(scratch2, Map::kPrototypeOffset)); |
| 200 | // scratch2: current prototype |
| 201 | __ CompareRoot(scratch2, Heap::kNullValueRootIndex); |
| 202 | __ b(eq, &absent); |
| 203 | __ ldr(elements, FieldMemOperand(scratch2, JSObject::kElementsOffset)); |
| 204 | __ ldr(scratch2, FieldMemOperand(scratch2, HeapObject::kMapOffset)); |
| 205 | // elements: elements of current prototype |
| 206 | // scratch2: map of current prototype |
| 207 | __ CompareInstanceType(scratch2, scratch1, JS_OBJECT_TYPE); |
| 208 | __ b(lo, slow); |
| 209 | __ ldrb(scratch1, FieldMemOperand(scratch2, Map::kBitFieldOffset)); |
| 210 | __ tst(scratch1, Operand((1 << Map::kIsAccessCheckNeeded) | |
| 211 | (1 << Map::kHasIndexedInterceptor))); |
| 212 | __ b(ne, slow); |
| 213 | __ CompareRoot(elements, Heap::kEmptyFixedArrayRootIndex); |
| 214 | __ b(ne, slow); |
| 215 | __ jmp(&check_next_prototype); |
| 216 | |
| 217 | __ bind(&absent); |
| 218 | if (is_strong(language_mode)) { |
| 219 | // Strong mode accesses must throw in this case, so call the runtime. |
| 220 | __ jmp(slow); |
| 221 | } else { |
| 222 | __ LoadRoot(result, Heap::kUndefinedValueRootIndex); |
| 223 | __ jmp(&done); |
| 224 | } |
| 225 | |
| 226 | __ bind(&in_bounds); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 227 | // Fast case: Do the load. |
| 228 | __ add(scratch1, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 229 | __ ldr(scratch2, MemOperand::PointerAddressFromSmiKey(scratch1, key)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 230 | __ CompareRoot(scratch2, Heap::kTheHoleValueRootIndex); |
| 231 | // In case the loaded value is the_hole we have to check the prototype chain. |
| 232 | __ b(eq, &check_prototypes); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 233 | __ mov(result, scratch2); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 234 | __ bind(&done); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 235 | } |
| 236 | |
| 237 | |
| 238 | // Checks whether a key is an array index string or a unique name. |
| 239 | // Falls through if a key is a unique name. |
| 240 | static void GenerateKeyNameCheck(MacroAssembler* masm, Register key, |
| 241 | Register map, Register hash, |
| 242 | Label* index_string, Label* not_unique) { |
| 243 | // The key is not a smi. |
| 244 | Label unique; |
| 245 | // Is it a name? |
| 246 | __ CompareObjectType(key, map, hash, LAST_UNIQUE_NAME_TYPE); |
| 247 | __ b(hi, not_unique); |
| 248 | STATIC_ASSERT(LAST_UNIQUE_NAME_TYPE == FIRST_NONSTRING_TYPE); |
| 249 | __ b(eq, &unique); |
| 250 | |
| 251 | // Is the string an array index, with cached numeric value? |
| 252 | __ ldr(hash, FieldMemOperand(key, Name::kHashFieldOffset)); |
| 253 | __ tst(hash, Operand(Name::kContainsCachedArrayIndexMask)); |
| 254 | __ b(eq, index_string); |
| 255 | |
| 256 | // Is the string internalized? We know it's a string, so a single |
| 257 | // bit test is enough. |
| 258 | // map: key map |
| 259 | __ ldrb(hash, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| 260 | STATIC_ASSERT(kInternalizedTag == 0); |
| 261 | __ tst(hash, Operand(kIsNotInternalizedMask)); |
| 262 | __ b(ne, not_unique); |
| 263 | |
| 264 | __ bind(&unique); |
| 265 | } |
| 266 | |
| 267 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 268 | void LoadIC::GenerateNormal(MacroAssembler* masm, LanguageMode language_mode) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 269 | Register dictionary = r0; |
| 270 | DCHECK(!dictionary.is(LoadDescriptor::ReceiverRegister())); |
| 271 | DCHECK(!dictionary.is(LoadDescriptor::NameRegister())); |
| 272 | |
| 273 | Label slow; |
| 274 | |
| 275 | __ ldr(dictionary, FieldMemOperand(LoadDescriptor::ReceiverRegister(), |
| 276 | JSObject::kPropertiesOffset)); |
| 277 | GenerateDictionaryLoad(masm, &slow, dictionary, |
| 278 | LoadDescriptor::NameRegister(), r0, r3, r4); |
| 279 | __ Ret(); |
| 280 | |
| 281 | // Dictionary load failed, go slow (but don't miss). |
| 282 | __ bind(&slow); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 283 | GenerateRuntimeGetProperty(masm, language_mode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 284 | } |
| 285 | |
| 286 | |
| 287 | // A register that isn't one of the parameters to the load ic. |
| 288 | static const Register LoadIC_TempRegister() { return r3; } |
| 289 | |
| 290 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 291 | static void LoadIC_PushArgs(MacroAssembler* masm) { |
| 292 | Register receiver = LoadDescriptor::ReceiverRegister(); |
| 293 | Register name = LoadDescriptor::NameRegister(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 294 | Register slot = LoadDescriptor::SlotRegister(); |
| 295 | Register vector = LoadWithVectorDescriptor::VectorRegister(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 296 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 297 | __ Push(receiver, name, slot, vector); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 298 | } |
| 299 | |
| 300 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 301 | void LoadIC::GenerateMiss(MacroAssembler* masm) { |
| 302 | // The return address is in lr. |
| 303 | Isolate* isolate = masm->isolate(); |
| 304 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 305 | DCHECK(!AreAliased(r4, r5, LoadWithVectorDescriptor::SlotRegister(), |
| 306 | LoadWithVectorDescriptor::VectorRegister())); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 307 | __ IncrementCounter(isolate->counters()->load_miss(), 1, r4, r5); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 308 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 309 | LoadIC_PushArgs(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 310 | |
| 311 | // Perform tail call to the entry. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 312 | __ TailCallRuntime(Runtime::kLoadIC_Miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 313 | } |
| 314 | |
| 315 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 316 | void LoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm, |
| 317 | LanguageMode language_mode) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 318 | // The return address is in lr. |
| 319 | |
| 320 | __ mov(LoadIC_TempRegister(), LoadDescriptor::ReceiverRegister()); |
| 321 | __ Push(LoadIC_TempRegister(), LoadDescriptor::NameRegister()); |
| 322 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 323 | // Do tail-call to runtime routine. |
| 324 | __ TailCallRuntime(is_strong(language_mode) ? Runtime::kGetPropertyStrong |
| 325 | : Runtime::kGetProperty); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | |
| 329 | void KeyedLoadIC::GenerateMiss(MacroAssembler* masm) { |
| 330 | // The return address is in lr. |
| 331 | Isolate* isolate = masm->isolate(); |
| 332 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 333 | DCHECK(!AreAliased(r4, r5, LoadWithVectorDescriptor::SlotRegister(), |
| 334 | LoadWithVectorDescriptor::VectorRegister())); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 335 | __ IncrementCounter(isolate->counters()->keyed_load_miss(), 1, r4, r5); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 336 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 337 | LoadIC_PushArgs(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 338 | |
| 339 | // Perform tail call to the entry. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 340 | __ TailCallRuntime(Runtime::kKeyedLoadIC_Miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 341 | } |
| 342 | |
| 343 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 344 | void KeyedLoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm, |
| 345 | LanguageMode language_mode) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 346 | // The return address is in lr. |
| 347 | |
| 348 | __ Push(LoadDescriptor::ReceiverRegister(), LoadDescriptor::NameRegister()); |
| 349 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 350 | // Perform tail call to the entry. |
| 351 | // Do tail-call to runtime routine. |
| 352 | __ TailCallRuntime(is_strong(language_mode) ? Runtime::kKeyedGetPropertyStrong |
| 353 | : Runtime::kKeyedGetProperty); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 354 | } |
| 355 | |
| 356 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 357 | void KeyedLoadIC::GenerateMegamorphic(MacroAssembler* masm, |
| 358 | LanguageMode language_mode) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 359 | // The return address is in lr. |
| 360 | Label slow, check_name, index_smi, index_name, property_array_property; |
| 361 | Label probe_dictionary, check_number_dictionary; |
| 362 | |
| 363 | Register key = LoadDescriptor::NameRegister(); |
| 364 | Register receiver = LoadDescriptor::ReceiverRegister(); |
| 365 | DCHECK(key.is(r2)); |
| 366 | DCHECK(receiver.is(r1)); |
| 367 | |
| 368 | Isolate* isolate = masm->isolate(); |
| 369 | |
| 370 | // Check that the key is a smi. |
| 371 | __ JumpIfNotSmi(key, &check_name); |
| 372 | __ bind(&index_smi); |
| 373 | // Now the key is known to be a smi. This place is also jumped to from below |
| 374 | // where a numeric string is converted to a smi. |
| 375 | |
| 376 | GenerateKeyedLoadReceiverCheck(masm, receiver, r0, r3, |
| 377 | Map::kHasIndexedInterceptor, &slow); |
| 378 | |
| 379 | // Check the receiver's map to see if it has fast elements. |
| 380 | __ CheckFastElements(r0, r3, &check_number_dictionary); |
| 381 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 382 | GenerateFastArrayLoad(masm, receiver, key, r0, r3, r4, r0, &slow, |
| 383 | language_mode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 384 | __ IncrementCounter(isolate->counters()->keyed_load_generic_smi(), 1, r4, r3); |
| 385 | __ Ret(); |
| 386 | |
| 387 | __ bind(&check_number_dictionary); |
| 388 | __ ldr(r4, FieldMemOperand(receiver, JSObject::kElementsOffset)); |
| 389 | __ ldr(r3, FieldMemOperand(r4, JSObject::kMapOffset)); |
| 390 | |
| 391 | // Check whether the elements is a number dictionary. |
| 392 | // r3: elements map |
| 393 | // r4: elements |
| 394 | __ LoadRoot(ip, Heap::kHashTableMapRootIndex); |
| 395 | __ cmp(r3, ip); |
| 396 | __ b(ne, &slow); |
| 397 | __ SmiUntag(r0, key); |
| 398 | __ LoadFromNumberDictionary(&slow, r4, key, r0, r0, r3, r5); |
| 399 | __ Ret(); |
| 400 | |
| 401 | // Slow case, key and receiver still in r2 and r1. |
| 402 | __ bind(&slow); |
| 403 | __ IncrementCounter(isolate->counters()->keyed_load_generic_slow(), 1, r4, |
| 404 | r3); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 405 | GenerateRuntimeGetProperty(masm, language_mode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 406 | |
| 407 | __ bind(&check_name); |
| 408 | GenerateKeyNameCheck(masm, key, r0, r3, &index_name, &slow); |
| 409 | |
| 410 | GenerateKeyedLoadReceiverCheck(masm, receiver, r0, r3, |
| 411 | Map::kHasNamedInterceptor, &slow); |
| 412 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 413 | // If the receiver is a fast-case object, check the stub cache. Otherwise |
| 414 | // probe the dictionary. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 415 | __ ldr(r3, FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
| 416 | __ ldr(r4, FieldMemOperand(r3, HeapObject::kMapOffset)); |
| 417 | __ LoadRoot(ip, Heap::kHashTableMapRootIndex); |
| 418 | __ cmp(r4, ip); |
| 419 | __ b(eq, &probe_dictionary); |
| 420 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 421 | // The handlers in the stub cache expect a vector and slot. Since we won't |
| 422 | // change the IC from any downstream misses, a dummy vector can be used. |
| 423 | Register vector = LoadWithVectorDescriptor::VectorRegister(); |
| 424 | Register slot = LoadWithVectorDescriptor::SlotRegister(); |
| 425 | DCHECK(!AreAliased(vector, slot, r4, r5, r6, r9)); |
| 426 | Handle<TypeFeedbackVector> dummy_vector = |
| 427 | TypeFeedbackVector::DummyVector(masm->isolate()); |
| 428 | int slot_index = dummy_vector->GetIndex( |
| 429 | FeedbackVectorSlot(TypeFeedbackVector::kDummyKeyedLoadICSlot)); |
| 430 | __ LoadRoot(vector, Heap::kDummyVectorRootIndex); |
| 431 | __ mov(slot, Operand(Smi::FromInt(slot_index))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 432 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 433 | Code::Flags flags = Code::RemoveTypeAndHolderFromFlags( |
| 434 | Code::ComputeHandlerFlags(Code::LOAD_IC)); |
| 435 | masm->isolate()->stub_cache()->GenerateProbe(masm, Code::KEYED_LOAD_IC, flags, |
| 436 | receiver, key, r4, r5, r6, r9); |
| 437 | // Cache miss. |
| 438 | GenerateMiss(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 439 | |
| 440 | // Do a quick inline probe of the receiver's dictionary, if it |
| 441 | // exists. |
| 442 | __ bind(&probe_dictionary); |
| 443 | // r3: elements |
| 444 | __ ldr(r0, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| 445 | __ ldrb(r0, FieldMemOperand(r0, Map::kInstanceTypeOffset)); |
| 446 | GenerateGlobalInstanceTypeCheck(masm, r0, &slow); |
| 447 | // Load the property to r0. |
| 448 | GenerateDictionaryLoad(masm, &slow, r3, key, r0, r5, r4); |
| 449 | __ IncrementCounter(isolate->counters()->keyed_load_generic_symbol(), 1, r4, |
| 450 | r3); |
| 451 | __ Ret(); |
| 452 | |
| 453 | __ bind(&index_name); |
| 454 | __ IndexFromHash(r3, key); |
| 455 | // Now jump to the place where smi keys are handled. |
| 456 | __ jmp(&index_smi); |
| 457 | } |
| 458 | |
| 459 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 460 | static void StoreIC_PushArgs(MacroAssembler* masm) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 461 | __ Push(StoreDescriptor::ReceiverRegister(), StoreDescriptor::NameRegister(), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 462 | StoreDescriptor::ValueRegister(), |
| 463 | VectorStoreICDescriptor::SlotRegister(), |
| 464 | VectorStoreICDescriptor::VectorRegister()); |
| 465 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 466 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 467 | |
| 468 | void KeyedStoreIC::GenerateMiss(MacroAssembler* masm) { |
| 469 | StoreIC_PushArgs(masm); |
| 470 | |
| 471 | __ TailCallRuntime(Runtime::kKeyedStoreIC_Miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 472 | } |
| 473 | |
| 474 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 475 | static void KeyedStoreGenerateMegamorphicHelper( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 476 | MacroAssembler* masm, Label* fast_object, Label* fast_double, Label* slow, |
| 477 | KeyedStoreCheckMap check_map, KeyedStoreIncrementLength increment_length, |
| 478 | Register value, Register key, Register receiver, Register receiver_map, |
| 479 | Register elements_map, Register elements) { |
| 480 | Label transition_smi_elements; |
| 481 | Label finish_object_store, non_double_value, transition_double_elements; |
| 482 | Label fast_double_without_map_check; |
| 483 | |
| 484 | // Fast case: Do the store, could be either Object or double. |
| 485 | __ bind(fast_object); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 486 | Register scratch = r4; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 487 | Register address = r5; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 488 | DCHECK(!AreAliased(value, key, receiver, receiver_map, elements_map, elements, |
| 489 | scratch, address)); |
| 490 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 491 | if (check_map == kCheckMap) { |
| 492 | __ ldr(elements_map, FieldMemOperand(elements, HeapObject::kMapOffset)); |
| 493 | __ cmp(elements_map, |
| 494 | Operand(masm->isolate()->factory()->fixed_array_map())); |
| 495 | __ b(ne, fast_double); |
| 496 | } |
| 497 | |
| 498 | // HOLECHECK: guards "A[i] = V" |
| 499 | // We have to go to the runtime if the current value is the hole because |
| 500 | // there may be a callback on the element |
| 501 | Label holecheck_passed1; |
| 502 | __ add(address, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 503 | __ ldr(scratch, MemOperand::PointerAddressFromSmiKey(address, key, PreIndex)); |
| 504 | __ cmp(scratch, Operand(masm->isolate()->factory()->the_hole_value())); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 505 | __ b(ne, &holecheck_passed1); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 506 | __ JumpIfDictionaryInPrototypeChain(receiver, elements_map, scratch, slow); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 507 | |
| 508 | __ bind(&holecheck_passed1); |
| 509 | |
| 510 | // Smi stores don't require further checks. |
| 511 | Label non_smi_value; |
| 512 | __ JumpIfNotSmi(value, &non_smi_value); |
| 513 | |
| 514 | if (increment_length == kIncrementLength) { |
| 515 | // Add 1 to receiver->length. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 516 | __ add(scratch, key, Operand(Smi::FromInt(1))); |
| 517 | __ str(scratch, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 518 | } |
| 519 | // It's irrelevant whether array is smi-only or not when writing a smi. |
| 520 | __ add(address, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 521 | __ str(value, MemOperand::PointerAddressFromSmiKey(address, key)); |
| 522 | __ Ret(); |
| 523 | |
| 524 | __ bind(&non_smi_value); |
| 525 | // Escape to elements kind transition case. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 526 | __ CheckFastObjectElements(receiver_map, scratch, &transition_smi_elements); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 527 | |
| 528 | // Fast elements array, store the value to the elements backing store. |
| 529 | __ bind(&finish_object_store); |
| 530 | if (increment_length == kIncrementLength) { |
| 531 | // Add 1 to receiver->length. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 532 | __ add(scratch, key, Operand(Smi::FromInt(1))); |
| 533 | __ str(scratch, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 534 | } |
| 535 | __ add(address, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 536 | __ add(address, address, Operand::PointerOffsetFromSmiKey(key)); |
| 537 | __ str(value, MemOperand(address)); |
| 538 | // Update write barrier for the elements array address. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 539 | __ mov(scratch, value); // Preserve the value which is returned. |
| 540 | __ RecordWrite(elements, address, scratch, kLRHasNotBeenSaved, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 541 | kDontSaveFPRegs, EMIT_REMEMBERED_SET, OMIT_SMI_CHECK); |
| 542 | __ Ret(); |
| 543 | |
| 544 | __ bind(fast_double); |
| 545 | if (check_map == kCheckMap) { |
| 546 | // Check for fast double array case. If this fails, call through to the |
| 547 | // runtime. |
| 548 | __ CompareRoot(elements_map, Heap::kFixedDoubleArrayMapRootIndex); |
| 549 | __ b(ne, slow); |
| 550 | } |
| 551 | |
| 552 | // HOLECHECK: guards "A[i] double hole?" |
| 553 | // We have to see if the double version of the hole is present. If so |
| 554 | // go to the runtime. |
| 555 | __ add(address, elements, |
| 556 | Operand((FixedDoubleArray::kHeaderSize + sizeof(kHoleNanLower32)) - |
| 557 | kHeapObjectTag)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 558 | __ ldr(scratch, MemOperand(address, key, LSL, kPointerSizeLog2, PreIndex)); |
| 559 | __ cmp(scratch, Operand(kHoleNanUpper32)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 560 | __ b(ne, &fast_double_without_map_check); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 561 | __ JumpIfDictionaryInPrototypeChain(receiver, elements_map, scratch, slow); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 562 | |
| 563 | __ bind(&fast_double_without_map_check); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 564 | __ StoreNumberToDoubleElements(value, key, elements, scratch, d0, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 565 | &transition_double_elements); |
| 566 | if (increment_length == kIncrementLength) { |
| 567 | // Add 1 to receiver->length. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 568 | __ add(scratch, key, Operand(Smi::FromInt(1))); |
| 569 | __ str(scratch, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 570 | } |
| 571 | __ Ret(); |
| 572 | |
| 573 | __ bind(&transition_smi_elements); |
| 574 | // Transition the array appropriately depending on the value type. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 575 | __ ldr(scratch, FieldMemOperand(value, HeapObject::kMapOffset)); |
| 576 | __ CompareRoot(scratch, Heap::kHeapNumberMapRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 577 | __ b(ne, &non_double_value); |
| 578 | |
| 579 | // Value is a double. Transition FAST_SMI_ELEMENTS -> |
| 580 | // FAST_DOUBLE_ELEMENTS and complete the store. |
| 581 | __ LoadTransitionedArrayMapConditional( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 582 | FAST_SMI_ELEMENTS, FAST_DOUBLE_ELEMENTS, receiver_map, scratch, slow); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 583 | AllocationSiteMode mode = |
| 584 | AllocationSite::GetMode(FAST_SMI_ELEMENTS, FAST_DOUBLE_ELEMENTS); |
| 585 | ElementsTransitionGenerator::GenerateSmiToDouble(masm, receiver, key, value, |
| 586 | receiver_map, mode, slow); |
| 587 | __ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset)); |
| 588 | __ jmp(&fast_double_without_map_check); |
| 589 | |
| 590 | __ bind(&non_double_value); |
| 591 | // Value is not a double, FAST_SMI_ELEMENTS -> FAST_ELEMENTS |
| 592 | __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS, FAST_ELEMENTS, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 593 | receiver_map, scratch, slow); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 594 | mode = AllocationSite::GetMode(FAST_SMI_ELEMENTS, FAST_ELEMENTS); |
| 595 | ElementsTransitionGenerator::GenerateMapChangeElementsTransition( |
| 596 | masm, receiver, key, value, receiver_map, mode, slow); |
| 597 | __ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset)); |
| 598 | __ jmp(&finish_object_store); |
| 599 | |
| 600 | __ bind(&transition_double_elements); |
| 601 | // Elements are FAST_DOUBLE_ELEMENTS, but value is an Object that's not a |
| 602 | // HeapNumber. Make sure that the receiver is a Array with FAST_ELEMENTS and |
| 603 | // transition array from FAST_DOUBLE_ELEMENTS to FAST_ELEMENTS |
| 604 | __ LoadTransitionedArrayMapConditional(FAST_DOUBLE_ELEMENTS, FAST_ELEMENTS, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 605 | receiver_map, scratch, slow); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 606 | mode = AllocationSite::GetMode(FAST_DOUBLE_ELEMENTS, FAST_ELEMENTS); |
| 607 | ElementsTransitionGenerator::GenerateDoubleToObject( |
| 608 | masm, receiver, key, value, receiver_map, mode, slow); |
| 609 | __ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset)); |
| 610 | __ jmp(&finish_object_store); |
| 611 | } |
| 612 | |
| 613 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 614 | void KeyedStoreIC::GenerateMegamorphic(MacroAssembler* masm, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 615 | LanguageMode language_mode) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 616 | // ---------- S t a t e -------------- |
| 617 | // -- r0 : value |
| 618 | // -- r1 : key |
| 619 | // -- r2 : receiver |
| 620 | // -- lr : return address |
| 621 | // ----------------------------------- |
| 622 | Label slow, fast_object, fast_object_grow; |
| 623 | Label fast_double, fast_double_grow; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 624 | Label array, extra, check_if_double_array, maybe_name_key, miss; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 625 | |
| 626 | // Register usage. |
| 627 | Register value = StoreDescriptor::ValueRegister(); |
| 628 | Register key = StoreDescriptor::NameRegister(); |
| 629 | Register receiver = StoreDescriptor::ReceiverRegister(); |
| 630 | DCHECK(receiver.is(r1)); |
| 631 | DCHECK(key.is(r2)); |
| 632 | DCHECK(value.is(r0)); |
| 633 | Register receiver_map = r3; |
| 634 | Register elements_map = r6; |
| 635 | Register elements = r9; // Elements array of the receiver. |
| 636 | // r4 and r5 are used as general scratch registers. |
| 637 | |
| 638 | // Check that the key is a smi. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 639 | __ JumpIfNotSmi(key, &maybe_name_key); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 640 | // Check that the object isn't a smi. |
| 641 | __ JumpIfSmi(receiver, &slow); |
| 642 | // Get the map of the object. |
| 643 | __ ldr(receiver_map, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| 644 | // Check that the receiver does not require access checks and is not observed. |
| 645 | // The generic stub does not perform map checks or handle observed objects. |
| 646 | __ ldrb(ip, FieldMemOperand(receiver_map, Map::kBitFieldOffset)); |
| 647 | __ tst(ip, Operand(1 << Map::kIsAccessCheckNeeded | 1 << Map::kIsObserved)); |
| 648 | __ b(ne, &slow); |
| 649 | // Check if the object is a JS array or not. |
| 650 | __ ldrb(r4, FieldMemOperand(receiver_map, Map::kInstanceTypeOffset)); |
| 651 | __ cmp(r4, Operand(JS_ARRAY_TYPE)); |
| 652 | __ b(eq, &array); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 653 | // Check that the object is some kind of JS object EXCEPT JS Value type. In |
| 654 | // the case that the object is a value-wrapper object, we enter the runtime |
| 655 | // system to make sure that indexing into string objects works as intended. |
| 656 | STATIC_ASSERT(JS_VALUE_TYPE < JS_OBJECT_TYPE); |
| 657 | __ cmp(r4, Operand(JS_OBJECT_TYPE)); |
| 658 | __ b(lo, &slow); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 659 | |
| 660 | // Object case: Check key against length in the elements array. |
| 661 | __ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset)); |
| 662 | // Check array bounds. Both the key and the length of FixedArray are smis. |
| 663 | __ ldr(ip, FieldMemOperand(elements, FixedArray::kLengthOffset)); |
| 664 | __ cmp(key, Operand(ip)); |
| 665 | __ b(lo, &fast_object); |
| 666 | |
| 667 | // Slow case, handle jump to runtime. |
| 668 | __ bind(&slow); |
| 669 | // Entry registers are intact. |
| 670 | // r0: value. |
| 671 | // r1: key. |
| 672 | // r2: receiver. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 673 | PropertyICCompiler::GenerateRuntimeSetProperty(masm, language_mode); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 674 | // Never returns to here. |
| 675 | |
| 676 | __ bind(&maybe_name_key); |
| 677 | __ ldr(r4, FieldMemOperand(key, HeapObject::kMapOffset)); |
| 678 | __ ldrb(r4, FieldMemOperand(r4, Map::kInstanceTypeOffset)); |
| 679 | __ JumpIfNotUniqueNameInstanceType(r4, &slow); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 680 | |
| 681 | // We use register r8, because otherwise probing the megamorphic stub cache |
| 682 | // would require pushing temporaries on the stack. |
| 683 | // TODO(mvstanton): quit using register r8 when |
| 684 | // FLAG_enable_embedded_constant_pool is turned on. |
| 685 | DCHECK(!FLAG_enable_embedded_constant_pool); |
| 686 | Register temporary2 = r8; |
| 687 | // The handlers in the stub cache expect a vector and slot. Since we won't |
| 688 | // change the IC from any downstream misses, a dummy vector can be used. |
| 689 | Register vector = VectorStoreICDescriptor::VectorRegister(); |
| 690 | Register slot = VectorStoreICDescriptor::SlotRegister(); |
| 691 | |
| 692 | DCHECK(!AreAliased(vector, slot, r5, temporary2, r6, r9)); |
| 693 | Handle<TypeFeedbackVector> dummy_vector = |
| 694 | TypeFeedbackVector::DummyVector(masm->isolate()); |
| 695 | int slot_index = dummy_vector->GetIndex( |
| 696 | FeedbackVectorSlot(TypeFeedbackVector::kDummyKeyedStoreICSlot)); |
| 697 | __ LoadRoot(vector, Heap::kDummyVectorRootIndex); |
| 698 | __ mov(slot, Operand(Smi::FromInt(slot_index))); |
| 699 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 700 | Code::Flags flags = Code::RemoveTypeAndHolderFromFlags( |
| 701 | Code::ComputeHandlerFlags(Code::STORE_IC)); |
| 702 | masm->isolate()->stub_cache()->GenerateProbe( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 703 | masm, Code::STORE_IC, flags, receiver, key, r5, temporary2, r6, r9); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 704 | // Cache miss. |
| 705 | __ b(&miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 706 | |
| 707 | // Extra capacity case: Check if there is extra capacity to |
| 708 | // perform the store and update the length. Used for adding one |
| 709 | // element to the array by writing to array[array.length]. |
| 710 | __ bind(&extra); |
| 711 | // Condition code from comparing key and array length is still available. |
| 712 | __ b(ne, &slow); // Only support writing to writing to array[array.length]. |
| 713 | // Check for room in the elements backing store. |
| 714 | // Both the key and the length of FixedArray are smis. |
| 715 | __ ldr(ip, FieldMemOperand(elements, FixedArray::kLengthOffset)); |
| 716 | __ cmp(key, Operand(ip)); |
| 717 | __ b(hs, &slow); |
| 718 | __ ldr(elements_map, FieldMemOperand(elements, HeapObject::kMapOffset)); |
| 719 | __ cmp(elements_map, Operand(masm->isolate()->factory()->fixed_array_map())); |
| 720 | __ b(ne, &check_if_double_array); |
| 721 | __ jmp(&fast_object_grow); |
| 722 | |
| 723 | __ bind(&check_if_double_array); |
| 724 | __ cmp(elements_map, |
| 725 | Operand(masm->isolate()->factory()->fixed_double_array_map())); |
| 726 | __ b(ne, &slow); |
| 727 | __ jmp(&fast_double_grow); |
| 728 | |
| 729 | // Array case: Get the length and the elements array from the JS |
| 730 | // array. Check that the array is in fast mode (and writable); if it |
| 731 | // is the length is always a smi. |
| 732 | __ bind(&array); |
| 733 | __ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset)); |
| 734 | |
| 735 | // Check the key against the length in the array. |
| 736 | __ ldr(ip, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
| 737 | __ cmp(key, Operand(ip)); |
| 738 | __ b(hs, &extra); |
| 739 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 740 | KeyedStoreGenerateMegamorphicHelper( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 741 | masm, &fast_object, &fast_double, &slow, kCheckMap, kDontIncrementLength, |
| 742 | value, key, receiver, receiver_map, elements_map, elements); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 743 | KeyedStoreGenerateMegamorphicHelper(masm, &fast_object_grow, |
| 744 | &fast_double_grow, &slow, kDontCheckMap, |
| 745 | kIncrementLength, value, key, receiver, |
| 746 | receiver_map, elements_map, elements); |
| 747 | |
| 748 | __ bind(&miss); |
| 749 | GenerateMiss(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 750 | } |
| 751 | |
| 752 | |
| 753 | void StoreIC::GenerateMegamorphic(MacroAssembler* masm) { |
| 754 | Register receiver = StoreDescriptor::ReceiverRegister(); |
| 755 | Register name = StoreDescriptor::NameRegister(); |
| 756 | DCHECK(receiver.is(r1)); |
| 757 | DCHECK(name.is(r2)); |
| 758 | DCHECK(StoreDescriptor::ValueRegister().is(r0)); |
| 759 | |
| 760 | // Get the receiver from the stack and probe the stub cache. |
| 761 | Code::Flags flags = Code::RemoveTypeAndHolderFromFlags( |
| 762 | Code::ComputeHandlerFlags(Code::STORE_IC)); |
| 763 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 764 | masm->isolate()->stub_cache()->GenerateProbe(masm, Code::STORE_IC, flags, |
| 765 | receiver, name, r3, r4, r5, r6); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 766 | |
| 767 | // Cache miss: Jump to runtime. |
| 768 | GenerateMiss(masm); |
| 769 | } |
| 770 | |
| 771 | |
| 772 | void StoreIC::GenerateMiss(MacroAssembler* masm) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 773 | StoreIC_PushArgs(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 774 | |
| 775 | // Perform tail call to the entry. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 776 | __ TailCallRuntime(Runtime::kStoreIC_Miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 777 | } |
| 778 | |
| 779 | |
| 780 | void StoreIC::GenerateNormal(MacroAssembler* masm) { |
| 781 | Label miss; |
| 782 | Register receiver = StoreDescriptor::ReceiverRegister(); |
| 783 | Register name = StoreDescriptor::NameRegister(); |
| 784 | Register value = StoreDescriptor::ValueRegister(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 785 | Register dictionary = r5; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 786 | DCHECK(receiver.is(r1)); |
| 787 | DCHECK(name.is(r2)); |
| 788 | DCHECK(value.is(r0)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 789 | DCHECK(VectorStoreICDescriptor::VectorRegister().is(r3)); |
| 790 | DCHECK(VectorStoreICDescriptor::SlotRegister().is(r4)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 791 | |
| 792 | __ ldr(dictionary, FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
| 793 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 794 | GenerateDictionaryStore(masm, &miss, dictionary, name, value, r6, r9); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 795 | Counters* counters = masm->isolate()->counters(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 796 | __ IncrementCounter(counters->store_normal_hit(), 1, r6, r9); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 797 | __ Ret(); |
| 798 | |
| 799 | __ bind(&miss); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 800 | __ IncrementCounter(counters->store_normal_miss(), 1, r6, r9); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 801 | GenerateMiss(masm); |
| 802 | } |
| 803 | |
| 804 | |
| 805 | #undef __ |
| 806 | |
| 807 | |
| 808 | Condition CompareIC::ComputeCondition(Token::Value op) { |
| 809 | switch (op) { |
| 810 | case Token::EQ_STRICT: |
| 811 | case Token::EQ: |
| 812 | return eq; |
| 813 | case Token::LT: |
| 814 | return lt; |
| 815 | case Token::GT: |
| 816 | return gt; |
| 817 | case Token::LTE: |
| 818 | return le; |
| 819 | case Token::GTE: |
| 820 | return ge; |
| 821 | default: |
| 822 | UNREACHABLE(); |
| 823 | return kNoCondition; |
| 824 | } |
| 825 | } |
| 826 | |
| 827 | |
| 828 | bool CompareIC::HasInlinedSmiCode(Address address) { |
| 829 | // The address of the instruction following the call. |
| 830 | Address cmp_instruction_address = |
| 831 | Assembler::return_address_from_call_start(address); |
| 832 | |
| 833 | // If the instruction following the call is not a cmp rx, #yyy, nothing |
| 834 | // was inlined. |
| 835 | Instr instr = Assembler::instr_at(cmp_instruction_address); |
| 836 | return Assembler::IsCmpImmediate(instr); |
| 837 | } |
| 838 | |
| 839 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 840 | void PatchInlinedSmiCode(Isolate* isolate, Address address, |
| 841 | InlinedSmiCheck check) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 842 | Address cmp_instruction_address = |
| 843 | Assembler::return_address_from_call_start(address); |
| 844 | |
| 845 | // If the instruction following the call is not a cmp rx, #yyy, nothing |
| 846 | // was inlined. |
| 847 | Instr instr = Assembler::instr_at(cmp_instruction_address); |
| 848 | if (!Assembler::IsCmpImmediate(instr)) { |
| 849 | return; |
| 850 | } |
| 851 | |
| 852 | // The delta to the start of the map check instruction and the |
| 853 | // condition code uses at the patched jump. |
| 854 | int delta = Assembler::GetCmpImmediateRawImmediate(instr); |
| 855 | delta += Assembler::GetCmpImmediateRegister(instr).code() * kOff12Mask; |
| 856 | // If the delta is 0 the instruction is cmp r0, #0 which also signals that |
| 857 | // nothing was inlined. |
| 858 | if (delta == 0) { |
| 859 | return; |
| 860 | } |
| 861 | |
| 862 | if (FLAG_trace_ic) { |
| 863 | PrintF("[ patching ic at %p, cmp=%p, delta=%d\n", address, |
| 864 | cmp_instruction_address, delta); |
| 865 | } |
| 866 | |
| 867 | Address patch_address = |
| 868 | cmp_instruction_address - delta * Instruction::kInstrSize; |
| 869 | Instr instr_at_patch = Assembler::instr_at(patch_address); |
| 870 | Instr branch_instr = |
| 871 | Assembler::instr_at(patch_address + Instruction::kInstrSize); |
| 872 | // This is patching a conditional "jump if not smi/jump if smi" site. |
| 873 | // Enabling by changing from |
| 874 | // cmp rx, rx |
| 875 | // b eq/ne, <target> |
| 876 | // to |
| 877 | // tst rx, #kSmiTagMask |
| 878 | // b ne/eq, <target> |
| 879 | // and vice-versa to be disabled again. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 880 | CodePatcher patcher(isolate, patch_address, 2); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 881 | Register reg = Assembler::GetRn(instr_at_patch); |
| 882 | if (check == ENABLE_INLINED_SMI_CHECK) { |
| 883 | DCHECK(Assembler::IsCmpRegister(instr_at_patch)); |
| 884 | DCHECK_EQ(Assembler::GetRn(instr_at_patch).code(), |
| 885 | Assembler::GetRm(instr_at_patch).code()); |
| 886 | patcher.masm()->tst(reg, Operand(kSmiTagMask)); |
| 887 | } else { |
| 888 | DCHECK(check == DISABLE_INLINED_SMI_CHECK); |
| 889 | DCHECK(Assembler::IsTstImmediate(instr_at_patch)); |
| 890 | patcher.masm()->cmp(reg, reg); |
| 891 | } |
| 892 | DCHECK(Assembler::IsBranch(branch_instr)); |
| 893 | if (Assembler::GetCondition(branch_instr) == eq) { |
| 894 | patcher.EmitCondition(ne); |
| 895 | } else { |
| 896 | DCHECK(Assembler::GetCondition(branch_instr) == ne); |
| 897 | patcher.EmitCondition(eq); |
| 898 | } |
| 899 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 900 | } // namespace internal |
| 901 | } // namespace v8 |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 902 | |
| 903 | #endif // V8_TARGET_ARCH_ARM |