Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2013 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_ARM64 |
| 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 | #define __ ACCESS_MASM(masm) |
| 17 | |
| 18 | |
| 19 | // "type" holds an instance type on entry and is not clobbered. |
| 20 | // Generated code branch on "global_object" if type is any kind of global |
| 21 | // JS object. |
| 22 | static void GenerateGlobalInstanceTypeCheck(MacroAssembler* masm, Register type, |
| 23 | Label* global_object) { |
| 24 | __ Cmp(type, JS_GLOBAL_OBJECT_TYPE); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 25 | __ Ccmp(type, JS_GLOBAL_PROXY_TYPE, ZFlag, ne); |
| 26 | __ B(eq, global_object); |
| 27 | } |
| 28 | |
| 29 | |
| 30 | // Helper function used from LoadIC GenerateNormal. |
| 31 | // |
| 32 | // elements: Property dictionary. It is not clobbered if a jump to the miss |
| 33 | // label is done. |
| 34 | // name: Property name. It is not clobbered if a jump to the miss label is |
| 35 | // done |
| 36 | // result: Register for the result. It is only updated if a jump to the miss |
| 37 | // label is not done. |
| 38 | // The scratch registers need to be different from elements, name and result. |
| 39 | // The generated code assumes that the receiver has slow properties, |
| 40 | // is not a global object and does not have interceptors. |
| 41 | static void GenerateDictionaryLoad(MacroAssembler* masm, Label* miss, |
| 42 | Register elements, Register name, |
| 43 | Register result, Register scratch1, |
| 44 | Register scratch2) { |
| 45 | DCHECK(!AreAliased(elements, name, scratch1, scratch2)); |
| 46 | DCHECK(!AreAliased(result, scratch1, scratch2)); |
| 47 | |
| 48 | Label done; |
| 49 | |
| 50 | // Probe the dictionary. |
| 51 | NameDictionaryLookupStub::GeneratePositiveLookup(masm, miss, &done, elements, |
| 52 | name, scratch1, scratch2); |
| 53 | |
| 54 | // If probing finds an entry check that the value is a normal property. |
| 55 | __ Bind(&done); |
| 56 | |
| 57 | static const int kElementsStartOffset = |
| 58 | NameDictionary::kHeaderSize + |
| 59 | NameDictionary::kElementsStartIndex * kPointerSize; |
| 60 | static const int kDetailsOffset = kElementsStartOffset + 2 * kPointerSize; |
| 61 | __ Ldr(scratch1, FieldMemOperand(scratch2, kDetailsOffset)); |
| 62 | __ Tst(scratch1, Smi::FromInt(PropertyDetails::TypeField::kMask)); |
| 63 | __ B(ne, miss); |
| 64 | |
| 65 | // Get the value at the masked, scaled index and return. |
| 66 | __ Ldr(result, |
| 67 | FieldMemOperand(scratch2, kElementsStartOffset + 1 * kPointerSize)); |
| 68 | } |
| 69 | |
| 70 | |
| 71 | // Helper function used from StoreIC::GenerateNormal. |
| 72 | // |
| 73 | // elements: Property dictionary. It is not clobbered if a jump to the miss |
| 74 | // label is done. |
| 75 | // name: Property name. It is not clobbered if a jump to the miss label is |
| 76 | // done |
| 77 | // value: The value to store (never clobbered). |
| 78 | // |
| 79 | // The generated code assumes that the receiver has slow properties, |
| 80 | // is not a global object and does not have interceptors. |
| 81 | static void GenerateDictionaryStore(MacroAssembler* masm, Label* miss, |
| 82 | Register elements, Register name, |
| 83 | Register value, Register scratch1, |
| 84 | Register scratch2) { |
| 85 | DCHECK(!AreAliased(elements, name, value, scratch1, scratch2)); |
| 86 | |
| 87 | Label done; |
| 88 | |
| 89 | // Probe the dictionary. |
| 90 | NameDictionaryLookupStub::GeneratePositiveLookup(masm, miss, &done, elements, |
| 91 | name, scratch1, scratch2); |
| 92 | |
| 93 | // If probing finds an entry in the dictionary check that the value |
| 94 | // is a normal property that is not read only. |
| 95 | __ Bind(&done); |
| 96 | |
| 97 | static const int kElementsStartOffset = |
| 98 | NameDictionary::kHeaderSize + |
| 99 | NameDictionary::kElementsStartIndex * kPointerSize; |
| 100 | static const int kDetailsOffset = kElementsStartOffset + 2 * kPointerSize; |
| 101 | static const int kTypeAndReadOnlyMask = |
| 102 | PropertyDetails::TypeField::kMask | |
| 103 | PropertyDetails::AttributesField::encode(READ_ONLY); |
| 104 | __ Ldrsw(scratch1, UntagSmiFieldMemOperand(scratch2, kDetailsOffset)); |
| 105 | __ Tst(scratch1, kTypeAndReadOnlyMask); |
| 106 | __ B(ne, miss); |
| 107 | |
| 108 | // Store the value at the masked, scaled index and return. |
| 109 | static const int kValueOffset = kElementsStartOffset + kPointerSize; |
| 110 | __ Add(scratch2, scratch2, kValueOffset - kHeapObjectTag); |
| 111 | __ Str(value, MemOperand(scratch2)); |
| 112 | |
| 113 | // Update the write barrier. Make sure not to clobber the value. |
| 114 | __ Mov(scratch1, value); |
| 115 | __ RecordWrite(elements, scratch2, scratch1, kLRHasNotBeenSaved, |
| 116 | kDontSaveFPRegs); |
| 117 | } |
| 118 | |
| 119 | |
| 120 | // Checks the receiver for special cases (value type, slow case bits). |
| 121 | // Falls through for regular JS object and return the map of the |
| 122 | // receiver in 'map_scratch' if the receiver is not a SMI. |
| 123 | static void GenerateKeyedLoadReceiverCheck(MacroAssembler* masm, |
| 124 | Register receiver, |
| 125 | Register map_scratch, |
| 126 | Register scratch, |
| 127 | int interceptor_bit, Label* slow) { |
| 128 | DCHECK(!AreAliased(map_scratch, scratch)); |
| 129 | |
| 130 | // Check that the object isn't a smi. |
| 131 | __ JumpIfSmi(receiver, slow); |
| 132 | // Get the map of the receiver. |
| 133 | __ Ldr(map_scratch, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| 134 | // Check bit field. |
| 135 | __ Ldrb(scratch, FieldMemOperand(map_scratch, Map::kBitFieldOffset)); |
| 136 | __ Tbnz(scratch, Map::kIsAccessCheckNeeded, slow); |
| 137 | __ Tbnz(scratch, interceptor_bit, slow); |
| 138 | |
| 139 | // Check that the object is some kind of JS object EXCEPT JS Value type. |
| 140 | // In the case that the object is a value-wrapper object, we enter the |
| 141 | // runtime system to make sure that indexing into string objects work |
| 142 | // as intended. |
| 143 | STATIC_ASSERT(JS_OBJECT_TYPE > JS_VALUE_TYPE); |
| 144 | __ Ldrb(scratch, FieldMemOperand(map_scratch, Map::kInstanceTypeOffset)); |
| 145 | __ Cmp(scratch, JS_OBJECT_TYPE); |
| 146 | __ B(lt, slow); |
| 147 | } |
| 148 | |
| 149 | |
| 150 | // Loads an indexed element from a fast case array. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 151 | // |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 152 | // receiver - holds the receiver on entry. |
| 153 | // Unchanged unless 'result' is the same register. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 154 | // |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 155 | // key - holds the smi key on entry. |
| 156 | // Unchanged unless 'result' is the same register. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 157 | // |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 158 | // elements - holds the elements of the receiver and its prototypes. Clobbered. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 159 | // |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 160 | // result - holds the result on exit if the load succeeded. |
| 161 | // Allowed to be the the same as 'receiver' or 'key'. |
| 162 | // Unchanged on bailout so 'receiver' and 'key' can be safely |
| 163 | // used by further computation. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 164 | static void GenerateFastArrayLoad(MacroAssembler* masm, Register receiver, |
| 165 | Register key, Register elements, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 166 | Register scratch1, Register scratch2, |
| 167 | Register result, Label* slow, |
| 168 | LanguageMode language_mode) { |
| 169 | DCHECK(!AreAliased(receiver, key, elements, scratch1, scratch2)); |
| 170 | |
| 171 | Label check_prototypes, check_next_prototype; |
| 172 | Label done, in_bounds, absent; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 173 | |
| 174 | // Check for fast array. |
| 175 | __ Ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 176 | __ AssertFastElements(elements); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 177 | |
| 178 | // Check that the key (index) is within bounds. |
| 179 | __ Ldr(scratch1, FieldMemOperand(elements, FixedArray::kLengthOffset)); |
| 180 | __ Cmp(key, scratch1); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 181 | __ B(lo, &in_bounds); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 182 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 183 | // Out of bounds. Check the prototype chain to see if we can just return |
| 184 | // 'undefined'. |
| 185 | __ Cmp(key, Operand(Smi::FromInt(0))); |
| 186 | __ B(lt, slow); // Negative keys can't take the fast OOB path. |
| 187 | __ Bind(&check_prototypes); |
| 188 | __ Ldr(scratch2, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| 189 | __ Bind(&check_next_prototype); |
| 190 | __ Ldr(scratch2, FieldMemOperand(scratch2, Map::kPrototypeOffset)); |
| 191 | // scratch2: current prototype |
| 192 | __ JumpIfRoot(scratch2, Heap::kNullValueRootIndex, &absent); |
| 193 | __ Ldr(elements, FieldMemOperand(scratch2, JSObject::kElementsOffset)); |
| 194 | __ Ldr(scratch2, FieldMemOperand(scratch2, HeapObject::kMapOffset)); |
| 195 | // elements: elements of current prototype |
| 196 | // scratch2: map of current prototype |
| 197 | __ CompareInstanceType(scratch2, scratch1, JS_OBJECT_TYPE); |
| 198 | __ B(lo, slow); |
| 199 | __ Ldrb(scratch1, FieldMemOperand(scratch2, Map::kBitFieldOffset)); |
| 200 | __ Tbnz(scratch1, Map::kIsAccessCheckNeeded, slow); |
| 201 | __ Tbnz(scratch1, Map::kHasIndexedInterceptor, slow); |
| 202 | __ JumpIfNotRoot(elements, Heap::kEmptyFixedArrayRootIndex, slow); |
| 203 | __ B(&check_next_prototype); |
| 204 | |
| 205 | __ Bind(&absent); |
| 206 | if (is_strong(language_mode)) { |
| 207 | // Strong mode accesses must throw in this case, so call the runtime. |
| 208 | __ B(slow); |
| 209 | } else { |
| 210 | __ LoadRoot(result, Heap::kUndefinedValueRootIndex); |
| 211 | __ B(&done); |
| 212 | } |
| 213 | |
| 214 | __ Bind(&in_bounds); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 215 | // Fast case: Do the load. |
| 216 | __ Add(scratch1, elements, FixedArray::kHeaderSize - kHeapObjectTag); |
| 217 | __ SmiUntag(scratch2, key); |
| 218 | __ Ldr(scratch2, MemOperand(scratch1, scratch2, LSL, kPointerSizeLog2)); |
| 219 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 220 | // In case the loaded value is the_hole we have to check the prototype chain. |
| 221 | __ JumpIfRoot(scratch2, Heap::kTheHoleValueRootIndex, &check_prototypes); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 222 | |
| 223 | // Move the value to the result register. |
| 224 | // 'result' can alias with 'receiver' or 'key' but these two must be |
| 225 | // preserved if we jump to 'slow'. |
| 226 | __ Mov(result, scratch2); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 227 | __ Bind(&done); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 228 | } |
| 229 | |
| 230 | |
| 231 | // Checks whether a key is an array index string or a unique name. |
| 232 | // Falls through if a key is a unique name. |
| 233 | // The map of the key is returned in 'map_scratch'. |
| 234 | // If the jump to 'index_string' is done the hash of the key is left |
| 235 | // in 'hash_scratch'. |
| 236 | static void GenerateKeyNameCheck(MacroAssembler* masm, Register key, |
| 237 | Register map_scratch, Register hash_scratch, |
| 238 | Label* index_string, Label* not_unique) { |
| 239 | DCHECK(!AreAliased(key, map_scratch, hash_scratch)); |
| 240 | |
| 241 | // Is the key a name? |
| 242 | Label unique; |
| 243 | __ JumpIfObjectType(key, map_scratch, hash_scratch, LAST_UNIQUE_NAME_TYPE, |
| 244 | not_unique, hi); |
| 245 | STATIC_ASSERT(LAST_UNIQUE_NAME_TYPE == FIRST_NONSTRING_TYPE); |
| 246 | __ B(eq, &unique); |
| 247 | |
| 248 | // Is the string an array index with cached numeric value? |
| 249 | __ Ldr(hash_scratch.W(), FieldMemOperand(key, Name::kHashFieldOffset)); |
| 250 | __ TestAndBranchIfAllClear(hash_scratch, Name::kContainsCachedArrayIndexMask, |
| 251 | index_string); |
| 252 | |
| 253 | // Is the string internalized? We know it's a string, so a single bit test is |
| 254 | // enough. |
| 255 | __ Ldrb(hash_scratch, FieldMemOperand(map_scratch, Map::kInstanceTypeOffset)); |
| 256 | STATIC_ASSERT(kInternalizedTag == 0); |
| 257 | __ TestAndBranchIfAnySet(hash_scratch, kIsNotInternalizedMask, not_unique); |
| 258 | |
| 259 | __ Bind(&unique); |
| 260 | // Fall through if the key is a unique name. |
| 261 | } |
| 262 | |
| 263 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 264 | void LoadIC::GenerateNormal(MacroAssembler* masm, LanguageMode language_mode) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 265 | Register dictionary = x0; |
| 266 | DCHECK(!dictionary.is(LoadDescriptor::ReceiverRegister())); |
| 267 | DCHECK(!dictionary.is(LoadDescriptor::NameRegister())); |
| 268 | Label slow; |
| 269 | |
| 270 | __ Ldr(dictionary, FieldMemOperand(LoadDescriptor::ReceiverRegister(), |
| 271 | JSObject::kPropertiesOffset)); |
| 272 | GenerateDictionaryLoad(masm, &slow, dictionary, |
| 273 | LoadDescriptor::NameRegister(), x0, x3, x4); |
| 274 | __ Ret(); |
| 275 | |
| 276 | // Dictionary load failed, go slow (but don't miss). |
| 277 | __ Bind(&slow); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 278 | GenerateRuntimeGetProperty(masm, language_mode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 279 | } |
| 280 | |
| 281 | |
| 282 | void LoadIC::GenerateMiss(MacroAssembler* masm) { |
| 283 | // The return address is in lr. |
| 284 | Isolate* isolate = masm->isolate(); |
| 285 | ASM_LOCATION("LoadIC::GenerateMiss"); |
| 286 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 287 | DCHECK(!AreAliased(x4, x5, LoadWithVectorDescriptor::SlotRegister(), |
| 288 | LoadWithVectorDescriptor::VectorRegister())); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 289 | __ IncrementCounter(isolate->counters()->load_miss(), 1, x4, x5); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 290 | |
| 291 | // Perform tail call to the entry. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 292 | __ Push(LoadWithVectorDescriptor::ReceiverRegister(), |
| 293 | LoadWithVectorDescriptor::NameRegister(), |
| 294 | LoadWithVectorDescriptor::SlotRegister(), |
| 295 | LoadWithVectorDescriptor::VectorRegister()); |
| 296 | __ TailCallRuntime(Runtime::kLoadIC_Miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 297 | } |
| 298 | |
| 299 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 300 | void LoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm, |
| 301 | LanguageMode language_mode) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 302 | // The return address is in lr. |
| 303 | __ Push(LoadDescriptor::ReceiverRegister(), LoadDescriptor::NameRegister()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 304 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 305 | // Do tail-call to runtime routine. |
| 306 | __ TailCallRuntime(is_strong(language_mode) ? Runtime::kGetPropertyStrong |
| 307 | : Runtime::kGetProperty); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 308 | } |
| 309 | |
| 310 | |
| 311 | void KeyedLoadIC::GenerateMiss(MacroAssembler* masm) { |
| 312 | // The return address is in lr. |
| 313 | Isolate* isolate = masm->isolate(); |
| 314 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 315 | DCHECK(!AreAliased(x10, x11, LoadWithVectorDescriptor::SlotRegister(), |
| 316 | LoadWithVectorDescriptor::VectorRegister())); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 317 | __ IncrementCounter(isolate->counters()->keyed_load_miss(), 1, x10, x11); |
| 318 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 319 | __ Push(LoadWithVectorDescriptor::ReceiverRegister(), |
| 320 | LoadWithVectorDescriptor::NameRegister(), |
| 321 | LoadWithVectorDescriptor::SlotRegister(), |
| 322 | LoadWithVectorDescriptor::VectorRegister()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 323 | |
| 324 | // Perform tail call to the entry. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 325 | __ TailCallRuntime(Runtime::kKeyedLoadIC_Miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 329 | void KeyedLoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm, |
| 330 | LanguageMode language_mode) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 331 | // The return address is in lr. |
| 332 | __ Push(LoadDescriptor::ReceiverRegister(), LoadDescriptor::NameRegister()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 333 | |
| 334 | // Do tail-call to runtime routine. |
| 335 | __ TailCallRuntime(is_strong(language_mode) ? Runtime::kKeyedGetPropertyStrong |
| 336 | : Runtime::kKeyedGetProperty); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 337 | } |
| 338 | |
| 339 | |
| 340 | static void GenerateKeyedLoadWithSmiKey(MacroAssembler* masm, Register key, |
| 341 | Register receiver, Register scratch1, |
| 342 | Register scratch2, Register scratch3, |
| 343 | Register scratch4, Register scratch5, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 344 | Label* slow, |
| 345 | LanguageMode language_mode) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 346 | DCHECK(!AreAliased(key, receiver, scratch1, scratch2, scratch3, scratch4, |
| 347 | scratch5)); |
| 348 | |
| 349 | Isolate* isolate = masm->isolate(); |
| 350 | Label check_number_dictionary; |
| 351 | // If we can load the value, it should be returned in x0. |
| 352 | Register result = x0; |
| 353 | |
| 354 | GenerateKeyedLoadReceiverCheck(masm, receiver, scratch1, scratch2, |
| 355 | Map::kHasIndexedInterceptor, slow); |
| 356 | |
| 357 | // Check the receiver's map to see if it has fast elements. |
| 358 | __ CheckFastElements(scratch1, scratch2, &check_number_dictionary); |
| 359 | |
| 360 | GenerateFastArrayLoad(masm, receiver, key, scratch3, scratch2, scratch1, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 361 | result, slow, language_mode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 362 | __ IncrementCounter(isolate->counters()->keyed_load_generic_smi(), 1, |
| 363 | scratch1, scratch2); |
| 364 | __ Ret(); |
| 365 | |
| 366 | __ Bind(&check_number_dictionary); |
| 367 | __ Ldr(scratch3, FieldMemOperand(receiver, JSObject::kElementsOffset)); |
| 368 | __ Ldr(scratch2, FieldMemOperand(scratch3, JSObject::kMapOffset)); |
| 369 | |
| 370 | // Check whether we have a number dictionary. |
| 371 | __ JumpIfNotRoot(scratch2, Heap::kHashTableMapRootIndex, slow); |
| 372 | |
| 373 | __ LoadFromNumberDictionary(slow, scratch3, key, result, scratch1, scratch2, |
| 374 | scratch4, scratch5); |
| 375 | __ Ret(); |
| 376 | } |
| 377 | |
| 378 | static void GenerateKeyedLoadWithNameKey(MacroAssembler* masm, Register key, |
| 379 | Register receiver, Register scratch1, |
| 380 | Register scratch2, Register scratch3, |
| 381 | Register scratch4, Register scratch5, |
| 382 | Label* slow) { |
| 383 | DCHECK(!AreAliased(key, receiver, scratch1, scratch2, scratch3, scratch4, |
| 384 | scratch5)); |
| 385 | |
| 386 | Isolate* isolate = masm->isolate(); |
| 387 | Label probe_dictionary, property_array_property; |
| 388 | // If we can load the value, it should be returned in x0. |
| 389 | Register result = x0; |
| 390 | |
| 391 | GenerateKeyedLoadReceiverCheck(masm, receiver, scratch1, scratch2, |
| 392 | Map::kHasNamedInterceptor, slow); |
| 393 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 394 | // If the receiver is a fast-case object, check the stub cache. Otherwise |
| 395 | // probe the dictionary. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 396 | __ Ldr(scratch2, FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
| 397 | __ Ldr(scratch3, FieldMemOperand(scratch2, HeapObject::kMapOffset)); |
| 398 | __ JumpIfRoot(scratch3, Heap::kHashTableMapRootIndex, &probe_dictionary); |
| 399 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 400 | // The handlers in the stub cache expect a vector and slot. Since we won't |
| 401 | // change the IC from any downstream misses, a dummy vector can be used. |
| 402 | Register vector = LoadWithVectorDescriptor::VectorRegister(); |
| 403 | Register slot = LoadWithVectorDescriptor::SlotRegister(); |
| 404 | DCHECK(!AreAliased(vector, slot, scratch1, scratch2, scratch3, scratch4)); |
| 405 | Handle<TypeFeedbackVector> dummy_vector = |
| 406 | TypeFeedbackVector::DummyVector(masm->isolate()); |
| 407 | int slot_index = dummy_vector->GetIndex( |
| 408 | FeedbackVectorSlot(TypeFeedbackVector::kDummyKeyedLoadICSlot)); |
| 409 | __ LoadRoot(vector, Heap::kDummyVectorRootIndex); |
| 410 | __ Mov(slot, Operand(Smi::FromInt(slot_index))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 411 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 412 | Code::Flags flags = Code::RemoveTypeAndHolderFromFlags( |
| 413 | Code::ComputeHandlerFlags(Code::LOAD_IC)); |
| 414 | masm->isolate()->stub_cache()->GenerateProbe(masm, Code::KEYED_LOAD_IC, flags, |
| 415 | receiver, key, scratch1, |
| 416 | scratch2, scratch3, scratch4); |
| 417 | // Cache miss. |
| 418 | KeyedLoadIC::GenerateMiss(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 419 | |
| 420 | // Do a quick inline probe of the receiver's dictionary, if it exists. |
| 421 | __ Bind(&probe_dictionary); |
| 422 | __ Ldr(scratch1, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| 423 | __ Ldrb(scratch1, FieldMemOperand(scratch1, Map::kInstanceTypeOffset)); |
| 424 | GenerateGlobalInstanceTypeCheck(masm, scratch1, slow); |
| 425 | // Load the property. |
| 426 | GenerateDictionaryLoad(masm, slow, scratch2, key, result, scratch1, scratch3); |
| 427 | __ IncrementCounter(isolate->counters()->keyed_load_generic_symbol(), 1, |
| 428 | scratch1, scratch2); |
| 429 | __ Ret(); |
| 430 | } |
| 431 | |
| 432 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 433 | void KeyedLoadIC::GenerateMegamorphic(MacroAssembler* masm, |
| 434 | LanguageMode language_mode) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 435 | // The return address is in lr. |
| 436 | Label slow, check_name, index_smi, index_name; |
| 437 | |
| 438 | Register key = LoadDescriptor::NameRegister(); |
| 439 | Register receiver = LoadDescriptor::ReceiverRegister(); |
| 440 | DCHECK(key.is(x2)); |
| 441 | DCHECK(receiver.is(x1)); |
| 442 | |
| 443 | __ JumpIfNotSmi(key, &check_name); |
| 444 | __ Bind(&index_smi); |
| 445 | // Now the key is known to be a smi. This place is also jumped to from below |
| 446 | // where a numeric string is converted to a smi. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 447 | GenerateKeyedLoadWithSmiKey(masm, key, receiver, x7, x3, x4, x5, x6, &slow, |
| 448 | language_mode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 449 | |
| 450 | // Slow case. |
| 451 | __ Bind(&slow); |
| 452 | __ IncrementCounter(masm->isolate()->counters()->keyed_load_generic_slow(), 1, |
| 453 | x4, x3); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 454 | GenerateRuntimeGetProperty(masm, language_mode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 455 | |
| 456 | __ Bind(&check_name); |
| 457 | GenerateKeyNameCheck(masm, key, x0, x3, &index_name, &slow); |
| 458 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 459 | GenerateKeyedLoadWithNameKey(masm, key, receiver, x4, x5, x6, x7, x3, &slow); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 460 | |
| 461 | __ Bind(&index_name); |
| 462 | __ IndexFromHash(x3, key); |
| 463 | // Now jump to the place where smi keys are handled. |
| 464 | __ B(&index_smi); |
| 465 | } |
| 466 | |
| 467 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 468 | static void StoreIC_PushArgs(MacroAssembler* masm) { |
| 469 | __ Push(StoreDescriptor::ReceiverRegister(), StoreDescriptor::NameRegister(), |
| 470 | StoreDescriptor::ValueRegister(), |
| 471 | VectorStoreICDescriptor::SlotRegister(), |
| 472 | VectorStoreICDescriptor::VectorRegister()); |
| 473 | } |
| 474 | |
| 475 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 476 | void KeyedStoreIC::GenerateMiss(MacroAssembler* masm) { |
| 477 | ASM_LOCATION("KeyedStoreIC::GenerateMiss"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 478 | StoreIC_PushArgs(masm); |
| 479 | __ TailCallRuntime(Runtime::kKeyedStoreIC_Miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 480 | } |
| 481 | |
| 482 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 483 | static void KeyedStoreGenerateMegamorphicHelper( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 484 | MacroAssembler* masm, Label* fast_object, Label* fast_double, Label* slow, |
| 485 | KeyedStoreCheckMap check_map, KeyedStoreIncrementLength increment_length, |
| 486 | Register value, Register key, Register receiver, Register receiver_map, |
| 487 | Register elements_map, Register elements) { |
| 488 | DCHECK(!AreAliased(value, key, receiver, receiver_map, elements_map, elements, |
| 489 | x10, x11)); |
| 490 | |
| 491 | Label transition_smi_elements; |
| 492 | Label transition_double_elements; |
| 493 | Label fast_double_without_map_check; |
| 494 | Label non_double_value; |
| 495 | Label finish_store; |
| 496 | |
| 497 | __ Bind(fast_object); |
| 498 | if (check_map == kCheckMap) { |
| 499 | __ Ldr(elements_map, FieldMemOperand(elements, HeapObject::kMapOffset)); |
| 500 | __ Cmp(elements_map, |
| 501 | Operand(masm->isolate()->factory()->fixed_array_map())); |
| 502 | __ B(ne, fast_double); |
| 503 | } |
| 504 | |
| 505 | // HOLECHECK: guards "A[i] = V" |
| 506 | // We have to go to the runtime if the current value is the hole because there |
| 507 | // may be a callback on the element. |
| 508 | Label holecheck_passed; |
| 509 | __ Add(x10, elements, FixedArray::kHeaderSize - kHeapObjectTag); |
| 510 | __ Add(x10, x10, Operand::UntagSmiAndScale(key, kPointerSizeLog2)); |
| 511 | __ Ldr(x11, MemOperand(x10)); |
| 512 | __ JumpIfNotRoot(x11, Heap::kTheHoleValueRootIndex, &holecheck_passed); |
| 513 | __ JumpIfDictionaryInPrototypeChain(receiver, elements_map, x10, slow); |
| 514 | __ bind(&holecheck_passed); |
| 515 | |
| 516 | // Smi stores don't require further checks. |
| 517 | __ JumpIfSmi(value, &finish_store); |
| 518 | |
| 519 | // Escape to elements kind transition case. |
| 520 | __ CheckFastObjectElements(receiver_map, x10, &transition_smi_elements); |
| 521 | |
| 522 | __ Bind(&finish_store); |
| 523 | if (increment_length == kIncrementLength) { |
| 524 | // Add 1 to receiver->length. |
| 525 | __ Add(x10, key, Smi::FromInt(1)); |
| 526 | __ Str(x10, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
| 527 | } |
| 528 | |
| 529 | Register address = x11; |
| 530 | __ Add(address, elements, FixedArray::kHeaderSize - kHeapObjectTag); |
| 531 | __ Add(address, address, Operand::UntagSmiAndScale(key, kPointerSizeLog2)); |
| 532 | __ Str(value, MemOperand(address)); |
| 533 | |
| 534 | Label dont_record_write; |
| 535 | __ JumpIfSmi(value, &dont_record_write); |
| 536 | |
| 537 | // Update write barrier for the elements array address. |
| 538 | __ Mov(x10, value); // Preserve the value which is returned. |
| 539 | __ RecordWrite(elements, address, x10, kLRHasNotBeenSaved, kDontSaveFPRegs, |
| 540 | EMIT_REMEMBERED_SET, OMIT_SMI_CHECK); |
| 541 | |
| 542 | __ Bind(&dont_record_write); |
| 543 | __ Ret(); |
| 544 | |
| 545 | |
| 546 | __ Bind(fast_double); |
| 547 | if (check_map == kCheckMap) { |
| 548 | // Check for fast double array case. If this fails, call through to the |
| 549 | // runtime. |
| 550 | __ JumpIfNotRoot(elements_map, Heap::kFixedDoubleArrayMapRootIndex, slow); |
| 551 | } |
| 552 | |
| 553 | // HOLECHECK: guards "A[i] double hole?" |
| 554 | // We have to see if the double version of the hole is present. If so go to |
| 555 | // the runtime. |
| 556 | __ Add(x10, elements, FixedDoubleArray::kHeaderSize - kHeapObjectTag); |
| 557 | __ Add(x10, x10, Operand::UntagSmiAndScale(key, kPointerSizeLog2)); |
| 558 | __ Ldr(x11, MemOperand(x10)); |
| 559 | __ CompareAndBranch(x11, kHoleNanInt64, ne, &fast_double_without_map_check); |
| 560 | __ JumpIfDictionaryInPrototypeChain(receiver, elements_map, x10, slow); |
| 561 | |
| 562 | __ Bind(&fast_double_without_map_check); |
| 563 | __ StoreNumberToDoubleElements(value, key, elements, x10, d0, |
| 564 | &transition_double_elements); |
| 565 | if (increment_length == kIncrementLength) { |
| 566 | // Add 1 to receiver->length. |
| 567 | __ Add(x10, key, Smi::FromInt(1)); |
| 568 | __ Str(x10, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
| 569 | } |
| 570 | __ Ret(); |
| 571 | |
| 572 | |
| 573 | __ Bind(&transition_smi_elements); |
| 574 | // Transition the array appropriately depending on the value type. |
| 575 | __ Ldr(x10, FieldMemOperand(value, HeapObject::kMapOffset)); |
| 576 | __ JumpIfNotRoot(x10, Heap::kHeapNumberMapRootIndex, &non_double_value); |
| 577 | |
| 578 | // Value is a double. Transition FAST_SMI_ELEMENTS -> |
| 579 | // FAST_DOUBLE_ELEMENTS and complete the store. |
| 580 | __ LoadTransitionedArrayMapConditional( |
| 581 | FAST_SMI_ELEMENTS, FAST_DOUBLE_ELEMENTS, receiver_map, x10, x11, slow); |
| 582 | AllocationSiteMode mode = |
| 583 | AllocationSite::GetMode(FAST_SMI_ELEMENTS, FAST_DOUBLE_ELEMENTS); |
| 584 | ElementsTransitionGenerator::GenerateSmiToDouble(masm, receiver, key, value, |
| 585 | receiver_map, mode, slow); |
| 586 | __ Ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset)); |
| 587 | __ B(&fast_double_without_map_check); |
| 588 | |
| 589 | __ Bind(&non_double_value); |
| 590 | // Value is not a double, FAST_SMI_ELEMENTS -> FAST_ELEMENTS. |
| 591 | __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS, FAST_ELEMENTS, |
| 592 | receiver_map, x10, x11, slow); |
| 593 | |
| 594 | mode = AllocationSite::GetMode(FAST_SMI_ELEMENTS, FAST_ELEMENTS); |
| 595 | ElementsTransitionGenerator::GenerateMapChangeElementsTransition( |
| 596 | masm, receiver, key, value, receiver_map, mode, slow); |
| 597 | |
| 598 | __ Ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset)); |
| 599 | __ B(&finish_store); |
| 600 | |
| 601 | __ Bind(&transition_double_elements); |
| 602 | // Elements are FAST_DOUBLE_ELEMENTS, but value is an Object that's not a |
| 603 | // HeapNumber. Make sure that the receiver is a Array with FAST_ELEMENTS and |
| 604 | // transition array from FAST_DOUBLE_ELEMENTS to FAST_ELEMENTS |
| 605 | __ LoadTransitionedArrayMapConditional(FAST_DOUBLE_ELEMENTS, FAST_ELEMENTS, |
| 606 | receiver_map, x10, x11, slow); |
| 607 | mode = AllocationSite::GetMode(FAST_DOUBLE_ELEMENTS, FAST_ELEMENTS); |
| 608 | ElementsTransitionGenerator::GenerateDoubleToObject( |
| 609 | masm, receiver, key, value, receiver_map, mode, slow); |
| 610 | __ Ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset)); |
| 611 | __ B(&finish_store); |
| 612 | } |
| 613 | |
| 614 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 615 | void KeyedStoreIC::GenerateMegamorphic(MacroAssembler* masm, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 616 | LanguageMode language_mode) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 617 | ASM_LOCATION("KeyedStoreIC::GenerateMegamorphic"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 618 | Label slow; |
| 619 | Label array; |
| 620 | Label fast_object; |
| 621 | Label extra; |
| 622 | Label fast_object_grow; |
| 623 | Label fast_double_grow; |
| 624 | Label fast_double; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 625 | Label maybe_name_key; |
| 626 | Label miss; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 627 | |
| 628 | Register value = StoreDescriptor::ValueRegister(); |
| 629 | Register key = StoreDescriptor::NameRegister(); |
| 630 | Register receiver = StoreDescriptor::ReceiverRegister(); |
| 631 | DCHECK(receiver.is(x1)); |
| 632 | DCHECK(key.is(x2)); |
| 633 | DCHECK(value.is(x0)); |
| 634 | |
| 635 | Register receiver_map = x3; |
| 636 | Register elements = x4; |
| 637 | Register elements_map = x5; |
| 638 | |
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 | __ JumpIfSmi(receiver, &slow); |
| 641 | __ Ldr(receiver_map, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| 642 | |
| 643 | // Check that the receiver does not require access checks and is not observed. |
| 644 | // The generic stub does not perform map checks or handle observed objects. |
| 645 | __ Ldrb(x10, FieldMemOperand(receiver_map, Map::kBitFieldOffset)); |
| 646 | __ TestAndBranchIfAnySet( |
| 647 | x10, (1 << Map::kIsAccessCheckNeeded) | (1 << Map::kIsObserved), &slow); |
| 648 | |
| 649 | // Check if the object is a JS array or not. |
| 650 | Register instance_type = x10; |
| 651 | __ CompareInstanceType(receiver_map, instance_type, 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(instance_type, 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 | __ Ldrsw(x10, UntagSmiFieldMemOperand(elements, FixedArray::kLengthOffset)); |
| 664 | __ Cmp(x10, Operand::UntagSmi(key)); |
| 665 | __ B(hi, &fast_object); |
| 666 | |
| 667 | |
| 668 | __ Bind(&slow); |
| 669 | // Slow case, handle jump to runtime. |
| 670 | // Live values: |
| 671 | // x0: value |
| 672 | // x1: key |
| 673 | // x2: receiver |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 674 | PropertyICCompiler::GenerateRuntimeSetProperty(masm, language_mode); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 675 | // Never returns to here. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 676 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 677 | __ bind(&maybe_name_key); |
| 678 | __ Ldr(x10, FieldMemOperand(key, HeapObject::kMapOffset)); |
| 679 | __ Ldrb(x10, FieldMemOperand(x10, Map::kInstanceTypeOffset)); |
| 680 | __ JumpIfNotUniqueNameInstanceType(x10, &slow); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 681 | |
| 682 | // The handlers in the stub cache expect a vector and slot. Since we won't |
| 683 | // change the IC from any downstream misses, a dummy vector can be used. |
| 684 | Register vector = VectorStoreICDescriptor::VectorRegister(); |
| 685 | Register slot = VectorStoreICDescriptor::SlotRegister(); |
| 686 | DCHECK(!AreAliased(vector, slot, x5, x6, x7, x8)); |
| 687 | Handle<TypeFeedbackVector> dummy_vector = |
| 688 | TypeFeedbackVector::DummyVector(masm->isolate()); |
| 689 | int slot_index = dummy_vector->GetIndex( |
| 690 | FeedbackVectorSlot(TypeFeedbackVector::kDummyKeyedStoreICSlot)); |
| 691 | __ LoadRoot(vector, Heap::kDummyVectorRootIndex); |
| 692 | __ Mov(slot, Operand(Smi::FromInt(slot_index))); |
| 693 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 694 | Code::Flags flags = Code::RemoveTypeAndHolderFromFlags( |
| 695 | Code::ComputeHandlerFlags(Code::STORE_IC)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 696 | masm->isolate()->stub_cache()->GenerateProbe(masm, Code::STORE_IC, flags, |
| 697 | receiver, key, x5, x6, x7, x8); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 698 | // Cache miss. |
| 699 | __ B(&miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 700 | |
| 701 | __ Bind(&extra); |
| 702 | // Extra capacity case: Check if there is extra capacity to |
| 703 | // perform the store and update the length. Used for adding one |
| 704 | // element to the array by writing to array[array.length]. |
| 705 | |
| 706 | // Check for room in the elements backing store. |
| 707 | // Both the key and the length of FixedArray are smis. |
| 708 | __ Ldrsw(x10, UntagSmiFieldMemOperand(elements, FixedArray::kLengthOffset)); |
| 709 | __ Cmp(x10, Operand::UntagSmi(key)); |
| 710 | __ B(ls, &slow); |
| 711 | |
| 712 | __ Ldr(elements_map, FieldMemOperand(elements, HeapObject::kMapOffset)); |
| 713 | __ Cmp(elements_map, Operand(masm->isolate()->factory()->fixed_array_map())); |
| 714 | __ B(eq, &fast_object_grow); |
| 715 | __ Cmp(elements_map, |
| 716 | Operand(masm->isolate()->factory()->fixed_double_array_map())); |
| 717 | __ B(eq, &fast_double_grow); |
| 718 | __ B(&slow); |
| 719 | |
| 720 | |
| 721 | __ Bind(&array); |
| 722 | // Array case: Get the length and the elements array from the JS |
| 723 | // array. Check that the array is in fast mode (and writable); if it |
| 724 | // is the length is always a smi. |
| 725 | |
| 726 | __ Ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset)); |
| 727 | |
| 728 | // Check the key against the length in the array. |
| 729 | __ Ldrsw(x10, UntagSmiFieldMemOperand(receiver, JSArray::kLengthOffset)); |
| 730 | __ Cmp(x10, Operand::UntagSmi(key)); |
| 731 | __ B(eq, &extra); // We can handle the case where we are appending 1 element. |
| 732 | __ B(lo, &slow); |
| 733 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 734 | KeyedStoreGenerateMegamorphicHelper( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 735 | masm, &fast_object, &fast_double, &slow, kCheckMap, kDontIncrementLength, |
| 736 | value, key, receiver, receiver_map, elements_map, elements); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 737 | KeyedStoreGenerateMegamorphicHelper(masm, &fast_object_grow, |
| 738 | &fast_double_grow, &slow, kDontCheckMap, |
| 739 | kIncrementLength, value, key, receiver, |
| 740 | receiver_map, elements_map, elements); |
| 741 | |
| 742 | __ bind(&miss); |
| 743 | GenerateMiss(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 744 | } |
| 745 | |
| 746 | |
| 747 | void StoreIC::GenerateMegamorphic(MacroAssembler* masm) { |
| 748 | Register receiver = StoreDescriptor::ReceiverRegister(); |
| 749 | Register name = StoreDescriptor::NameRegister(); |
| 750 | DCHECK(!AreAliased(receiver, name, StoreDescriptor::ValueRegister(), x3, x4, |
| 751 | x5, x6)); |
| 752 | |
| 753 | // Probe the stub cache. |
| 754 | Code::Flags flags = Code::RemoveTypeAndHolderFromFlags( |
| 755 | Code::ComputeHandlerFlags(Code::STORE_IC)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 756 | masm->isolate()->stub_cache()->GenerateProbe(masm, Code::STORE_IC, flags, |
| 757 | receiver, name, x3, x4, x5, x6); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 758 | |
| 759 | // Cache miss: Jump to runtime. |
| 760 | GenerateMiss(masm); |
| 761 | } |
| 762 | |
| 763 | |
| 764 | void StoreIC::GenerateMiss(MacroAssembler* masm) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 765 | StoreIC_PushArgs(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 766 | |
| 767 | // Tail call to the entry. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 768 | __ TailCallRuntime(Runtime::kStoreIC_Miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 769 | } |
| 770 | |
| 771 | |
| 772 | void StoreIC::GenerateNormal(MacroAssembler* masm) { |
| 773 | Label miss; |
| 774 | Register value = StoreDescriptor::ValueRegister(); |
| 775 | Register receiver = StoreDescriptor::ReceiverRegister(); |
| 776 | Register name = StoreDescriptor::NameRegister(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 777 | Register dictionary = x5; |
| 778 | DCHECK(!AreAliased(value, receiver, name, |
| 779 | VectorStoreICDescriptor::SlotRegister(), |
| 780 | VectorStoreICDescriptor::VectorRegister(), x5, x6, x7)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 781 | |
| 782 | __ Ldr(dictionary, FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
| 783 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 784 | GenerateDictionaryStore(masm, &miss, dictionary, name, value, x6, x7); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 785 | Counters* counters = masm->isolate()->counters(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 786 | __ IncrementCounter(counters->store_normal_hit(), 1, x6, x7); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 787 | __ Ret(); |
| 788 | |
| 789 | // Cache miss: Jump to runtime. |
| 790 | __ Bind(&miss); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 791 | __ IncrementCounter(counters->store_normal_miss(), 1, x6, x7); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 792 | GenerateMiss(masm); |
| 793 | } |
| 794 | |
| 795 | |
| 796 | Condition CompareIC::ComputeCondition(Token::Value op) { |
| 797 | switch (op) { |
| 798 | case Token::EQ_STRICT: |
| 799 | case Token::EQ: |
| 800 | return eq; |
| 801 | case Token::LT: |
| 802 | return lt; |
| 803 | case Token::GT: |
| 804 | return gt; |
| 805 | case Token::LTE: |
| 806 | return le; |
| 807 | case Token::GTE: |
| 808 | return ge; |
| 809 | default: |
| 810 | UNREACHABLE(); |
| 811 | return al; |
| 812 | } |
| 813 | } |
| 814 | |
| 815 | |
| 816 | bool CompareIC::HasInlinedSmiCode(Address address) { |
| 817 | // The address of the instruction following the call. |
| 818 | Address info_address = Assembler::return_address_from_call_start(address); |
| 819 | |
| 820 | InstructionSequence* patch_info = InstructionSequence::At(info_address); |
| 821 | return patch_info->IsInlineData(); |
| 822 | } |
| 823 | |
| 824 | |
| 825 | // Activate a SMI fast-path by patching the instructions generated by |
| 826 | // JumpPatchSite::EmitJumpIf(Not)Smi(), using the information encoded by |
| 827 | // JumpPatchSite::EmitPatchInfo(). |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 828 | void PatchInlinedSmiCode(Isolate* isolate, Address address, |
| 829 | InlinedSmiCheck check) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 830 | // The patch information is encoded in the instruction stream using |
| 831 | // instructions which have no side effects, so we can safely execute them. |
| 832 | // The patch information is encoded directly after the call to the helper |
| 833 | // function which is requesting this patch operation. |
| 834 | Address info_address = Assembler::return_address_from_call_start(address); |
| 835 | InlineSmiCheckInfo info(info_address); |
| 836 | |
| 837 | // Check and decode the patch information instruction. |
| 838 | if (!info.HasSmiCheck()) { |
| 839 | return; |
| 840 | } |
| 841 | |
| 842 | if (FLAG_trace_ic) { |
| 843 | PrintF("[ Patching ic at %p, marker=%p, SMI check=%p\n", address, |
| 844 | info_address, reinterpret_cast<void*>(info.SmiCheck())); |
| 845 | } |
| 846 | |
| 847 | // Patch and activate code generated by JumpPatchSite::EmitJumpIfNotSmi() |
| 848 | // and JumpPatchSite::EmitJumpIfSmi(). |
| 849 | // Changing |
| 850 | // tb(n)z xzr, #0, <target> |
| 851 | // to |
| 852 | // tb(!n)z test_reg, #0, <target> |
| 853 | Instruction* to_patch = info.SmiCheck(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 854 | PatchingAssembler patcher(isolate, to_patch, 1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 855 | DCHECK(to_patch->IsTestBranch()); |
| 856 | DCHECK(to_patch->ImmTestBranchBit5() == 0); |
| 857 | DCHECK(to_patch->ImmTestBranchBit40() == 0); |
| 858 | |
| 859 | STATIC_ASSERT(kSmiTag == 0); |
| 860 | STATIC_ASSERT(kSmiTagMask == 1); |
| 861 | |
| 862 | int branch_imm = to_patch->ImmTestBranch(); |
| 863 | Register smi_reg; |
| 864 | if (check == ENABLE_INLINED_SMI_CHECK) { |
| 865 | DCHECK(to_patch->Rt() == xzr.code()); |
| 866 | smi_reg = info.SmiRegister(); |
| 867 | } else { |
| 868 | DCHECK(check == DISABLE_INLINED_SMI_CHECK); |
| 869 | DCHECK(to_patch->Rt() != xzr.code()); |
| 870 | smi_reg = xzr; |
| 871 | } |
| 872 | |
| 873 | if (to_patch->Mask(TestBranchMask) == TBZ) { |
| 874 | // This is JumpIfNotSmi(smi_reg, branch_imm). |
| 875 | patcher.tbnz(smi_reg, 0, branch_imm); |
| 876 | } else { |
| 877 | DCHECK(to_patch->Mask(TestBranchMask) == TBNZ); |
| 878 | // This is JumpIfSmi(smi_reg, branch_imm). |
| 879 | patcher.tbz(smi_reg, 0, branch_imm); |
| 880 | } |
| 881 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 882 | } // namespace internal |
| 883 | } // namespace v8 |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 884 | |
| 885 | #endif // V8_TARGET_ARCH_ARM64 |