1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution.
12 // * Neither the name of Google Inc. nor the names of its
13 // contributors may be used to endorse or promote products derived
14 // from this software without specific prior written permission.
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #if V8_TARGET_ARCH_IA32
35 #include "stub-cache.h"
40 // ----------------------------------------------------------------------------
41 // Static IC stub generators.
44 #define __ ACCESS_MASM(masm)
47 static void GenerateGlobalInstanceTypeCheck(MacroAssembler* masm,
49 Label* global_object) {
51 // type: holds the receiver instance type on entry.
52 __ cmp(type, JS_GLOBAL_OBJECT_TYPE);
53 __ j(equal, global_object);
54 __ cmp(type, JS_BUILTINS_OBJECT_TYPE);
55 __ j(equal, global_object);
56 __ cmp(type, JS_GLOBAL_PROXY_TYPE);
57 __ j(equal, global_object);
61 // Generated code falls through if the receiver is a regular non-global
62 // JS object with slow properties and no interceptors.
63 static void GenerateNameDictionaryReceiverCheck(MacroAssembler* masm,
69 // receiver: holds the receiver on entry and is unchanged.
70 // r0: used to hold receiver instance type.
71 // Holds the property dictionary on fall through.
72 // r1: used to hold receivers map.
74 // Check that the receiver isn't a smi.
75 __ JumpIfSmi(receiver, miss);
77 // Check that the receiver is a valid JS object.
78 __ mov(r1, FieldOperand(receiver, HeapObject::kMapOffset));
79 __ movzx_b(r0, FieldOperand(r1, Map::kInstanceTypeOffset));
80 __ cmp(r0, FIRST_SPEC_OBJECT_TYPE);
83 // If this assert fails, we have to check upper bound too.
84 STATIC_ASSERT(LAST_TYPE == LAST_SPEC_OBJECT_TYPE);
86 GenerateGlobalInstanceTypeCheck(masm, r0, miss);
88 // Check for non-global object that requires access check.
89 __ test_b(FieldOperand(r1, Map::kBitFieldOffset),
90 (1 << Map::kIsAccessCheckNeeded) |
91 (1 << Map::kHasNamedInterceptor));
94 __ mov(r0, FieldOperand(receiver, JSObject::kPropertiesOffset));
95 __ CheckMap(r0, masm->isolate()->factory()->hash_table_map(), miss,
100 // Helper function used to load a property from a dictionary backing
101 // storage. This function may fail to load a property even though it is
102 // in the dictionary, so code at miss_label must always call a backup
103 // property load that is complete. This function is safe to call if
104 // name is not internalized, and will jump to the miss_label in that
105 // case. The generated code assumes that the receiver has slow
106 // properties, is not a global object and does not have interceptors.
107 static void GenerateDictionaryLoad(MacroAssembler* masm,
116 // elements - holds the property dictionary on entry and is unchanged.
118 // name - holds the name of the property on entry and is unchanged.
120 // Scratch registers:
122 // r0 - used for the index into the property dictionary
124 // r1 - used to hold the capacity of the property dictionary.
126 // result - holds the result on exit.
130 // Probe the dictionary.
131 NameDictionaryLookupStub::GeneratePositiveLookup(masm,
139 // If probing finds an entry in the dictionary, r0 contains the
140 // index into the dictionary. Check that the value is a normal
143 const int kElementsStartOffset =
144 NameDictionary::kHeaderSize +
145 NameDictionary::kElementsStartIndex * kPointerSize;
146 const int kDetailsOffset = kElementsStartOffset + 2 * kPointerSize;
147 __ test(Operand(elements, r0, times_4, kDetailsOffset - kHeapObjectTag),
148 Immediate(PropertyDetails::TypeField::kMask << kSmiTagSize));
149 __ j(not_zero, miss_label);
151 // Get the value at the masked, scaled index.
152 const int kValueOffset = kElementsStartOffset + kPointerSize;
153 __ mov(result, Operand(elements, r0, times_4, kValueOffset - kHeapObjectTag));
157 // Helper function used to store a property to a dictionary backing
158 // storage. This function may fail to store a property eventhough it
159 // is in the dictionary, so code at miss_label must always call a
160 // backup property store that is complete. This function is safe to
161 // call if name is not internalized, and will jump to the miss_label in
162 // that case. The generated code assumes that the receiver has slow
163 // properties, is not a global object and does not have interceptors.
164 static void GenerateDictionaryStore(MacroAssembler* masm,
173 // elements - holds the property dictionary on entry and is clobbered.
175 // name - holds the name of the property on entry and is unchanged.
177 // value - holds the value to store and is unchanged.
179 // r0 - used for index into the property dictionary and is clobbered.
181 // r1 - used to hold the capacity of the property dictionary and is clobbered.
185 // Probe the dictionary.
186 NameDictionaryLookupStub::GeneratePositiveLookup(masm,
194 // If probing finds an entry in the dictionary, r0 contains the
195 // index into the dictionary. Check that the value is a normal
196 // property that is not read only.
198 const int kElementsStartOffset =
199 NameDictionary::kHeaderSize +
200 NameDictionary::kElementsStartIndex * kPointerSize;
201 const int kDetailsOffset = kElementsStartOffset + 2 * kPointerSize;
202 const int kTypeAndReadOnlyMask =
203 (PropertyDetails::TypeField::kMask |
204 PropertyDetails::AttributesField::encode(READ_ONLY)) << kSmiTagSize;
205 __ test(Operand(elements, r0, times_4, kDetailsOffset - kHeapObjectTag),
206 Immediate(kTypeAndReadOnlyMask));
207 __ j(not_zero, miss_label);
209 // Store the value at the masked, scaled index.
210 const int kValueOffset = kElementsStartOffset + kPointerSize;
211 __ lea(r0, Operand(elements, r0, times_4, kValueOffset - kHeapObjectTag));
212 __ mov(Operand(r0, 0), value);
214 // Update write barrier. Make sure not to clobber the value.
216 __ RecordWrite(elements, r0, r1, kDontSaveFPRegs);
220 // Checks the receiver for special cases (value type, slow case bits).
221 // Falls through for regular JS object.
222 static void GenerateKeyedLoadReceiverCheck(MacroAssembler* masm,
228 // receiver - holds the receiver and is unchanged.
229 // Scratch registers:
230 // map - used to hold the map of the receiver.
232 // Check that the object isn't a smi.
233 __ JumpIfSmi(receiver, slow);
235 // Get the map of the receiver.
236 __ mov(map, FieldOperand(receiver, HeapObject::kMapOffset));
239 __ test_b(FieldOperand(map, Map::kBitFieldOffset),
240 (1 << Map::kIsAccessCheckNeeded) | (1 << interceptor_bit));
241 __ j(not_zero, slow);
242 // Check that the object is some kind of JS object EXCEPT JS Value type.
243 // In the case that the object is a value-wrapper object,
244 // we enter the runtime system to make sure that indexing
245 // into string objects works as intended.
246 ASSERT(JS_OBJECT_TYPE > JS_VALUE_TYPE);
248 __ CmpInstanceType(map, JS_OBJECT_TYPE);
253 // Loads an indexed element from a fast case array.
254 // If not_fast_array is NULL, doesn't perform the elements map check.
255 static void GenerateFastArrayLoad(MacroAssembler* masm,
260 Label* not_fast_array,
261 Label* out_of_range) {
263 // receiver - holds the receiver and is unchanged.
264 // key - holds the key and is unchanged (must be a smi).
265 // Scratch registers:
266 // scratch - used to hold elements of the receiver and the loaded value.
267 // result - holds the result on exit if the load succeeds and
270 __ mov(scratch, FieldOperand(receiver, JSObject::kElementsOffset));
271 if (not_fast_array != NULL) {
272 // Check that the object is in fast mode and writable.
274 masm->isolate()->factory()->fixed_array_map(),
278 __ AssertFastElements(scratch);
280 // Check that the key (index) is within bounds.
281 __ cmp(key, FieldOperand(scratch, FixedArray::kLengthOffset));
282 __ j(above_equal, out_of_range);
283 // Fast case: Do the load.
284 STATIC_ASSERT((kPointerSize == 4) && (kSmiTagSize == 1) && (kSmiTag == 0));
285 __ mov(scratch, FieldOperand(scratch, key, times_2, FixedArray::kHeaderSize));
286 __ cmp(scratch, Immediate(masm->isolate()->factory()->the_hole_value()));
287 // In case the loaded value is the_hole we have to consult GetProperty
288 // to ensure the prototype chain is searched.
289 __ j(equal, out_of_range);
290 if (!result.is(scratch)) {
291 __ mov(result, scratch);
296 // Checks whether a key is an array index string or a unique name.
297 // Falls through if the key is a unique name.
298 static void GenerateKeyNameCheck(MacroAssembler* masm,
305 // key - holds the key and is unchanged. Assumed to be non-smi.
306 // Scratch registers:
307 // map - used to hold the map of the key.
308 // hash - used to hold the hash of the key.
310 __ CmpObjectType(key, LAST_UNIQUE_NAME_TYPE, map);
311 __ j(above, not_unique);
312 STATIC_ASSERT(LAST_UNIQUE_NAME_TYPE == FIRST_NONSTRING_TYPE);
313 __ j(equal, &unique);
315 // Is the string an array index, with cached numeric value?
316 __ mov(hash, FieldOperand(key, Name::kHashFieldOffset));
317 __ test(hash, Immediate(Name::kContainsCachedArrayIndexMask));
318 __ j(zero, index_string);
320 // Is the string internalized? We already know it's a string so a single
321 // bit test is enough.
322 STATIC_ASSERT(kNotInternalizedTag != 0);
323 __ test_b(FieldOperand(map, Map::kInstanceTypeOffset),
324 kIsNotInternalizedMask);
325 __ j(not_zero, not_unique);
331 static Operand GenerateMappedArgumentsLookup(MacroAssembler* masm,
336 Label* unmapped_case,
338 Heap* heap = masm->isolate()->heap();
339 Factory* factory = masm->isolate()->factory();
341 // Check that the receiver is a JSObject. Because of the elements
342 // map check later, we do not need to check for interceptors or
343 // whether it requires access checks.
344 __ JumpIfSmi(object, slow_case);
345 // Check that the object is some kind of JSObject.
346 __ CmpObjectType(object, FIRST_JS_RECEIVER_TYPE, scratch1);
347 __ j(below, slow_case);
349 // Check that the key is a positive smi.
350 __ test(key, Immediate(0x80000001));
351 __ j(not_zero, slow_case);
353 // Load the elements into scratch1 and check its map.
354 Handle<Map> arguments_map(heap->non_strict_arguments_elements_map());
355 __ mov(scratch1, FieldOperand(object, JSObject::kElementsOffset));
356 __ CheckMap(scratch1, arguments_map, slow_case, DONT_DO_SMI_CHECK);
358 // Check if element is in the range of mapped arguments. If not, jump
359 // to the unmapped lookup with the parameter map in scratch1.
360 __ mov(scratch2, FieldOperand(scratch1, FixedArray::kLengthOffset));
361 __ sub(scratch2, Immediate(Smi::FromInt(2)));
362 __ cmp(key, scratch2);
363 __ j(above_equal, unmapped_case);
365 // Load element index and check whether it is the hole.
366 const int kHeaderSize = FixedArray::kHeaderSize + 2 * kPointerSize;
367 __ mov(scratch2, FieldOperand(scratch1,
369 times_half_pointer_size,
371 __ cmp(scratch2, factory->the_hole_value());
372 __ j(equal, unmapped_case);
374 // Load value from context and return it. We can reuse scratch1 because
375 // we do not jump to the unmapped lookup (which requires the parameter
377 const int kContextOffset = FixedArray::kHeaderSize;
378 __ mov(scratch1, FieldOperand(scratch1, kContextOffset));
379 return FieldOperand(scratch1,
381 times_half_pointer_size,
382 Context::kHeaderSize);
386 static Operand GenerateUnmappedArgumentsLookup(MacroAssembler* masm,
388 Register parameter_map,
391 // Element is in arguments backing store, which is referenced by the
392 // second element of the parameter_map.
393 const int kBackingStoreOffset = FixedArray::kHeaderSize + kPointerSize;
394 Register backing_store = parameter_map;
395 __ mov(backing_store, FieldOperand(parameter_map, kBackingStoreOffset));
396 Handle<Map> fixed_array_map(masm->isolate()->heap()->fixed_array_map());
397 __ CheckMap(backing_store, fixed_array_map, slow_case, DONT_DO_SMI_CHECK);
398 __ mov(scratch, FieldOperand(backing_store, FixedArray::kLengthOffset));
399 __ cmp(key, scratch);
400 __ j(greater_equal, slow_case);
401 return FieldOperand(backing_store,
403 times_half_pointer_size,
404 FixedArray::kHeaderSize);
408 void KeyedLoadIC::GenerateGeneric(MacroAssembler* masm) {
409 // ----------- S t a t e -------------
412 // -- esp[0] : return address
413 // -----------------------------------
414 Label slow, check_name, index_smi, index_name, property_array_property;
415 Label probe_dictionary, check_number_dictionary;
417 // Check that the key is a smi.
418 __ JumpIfNotSmi(ecx, &check_name);
420 // Now the key is known to be a smi. This place is also jumped to from
421 // where a numeric string is converted to a smi.
423 GenerateKeyedLoadReceiverCheck(
424 masm, edx, eax, Map::kHasIndexedInterceptor, &slow);
426 // Check the receiver's map to see if it has fast elements.
427 __ CheckFastElements(eax, &check_number_dictionary);
429 GenerateFastArrayLoad(masm, edx, ecx, eax, eax, NULL, &slow);
430 Isolate* isolate = masm->isolate();
431 Counters* counters = isolate->counters();
432 __ IncrementCounter(counters->keyed_load_generic_smi(), 1);
435 __ bind(&check_number_dictionary);
438 __ mov(eax, FieldOperand(edx, JSObject::kElementsOffset));
440 // Check whether the elements is a number dictionary.
442 // ebx: untagged index
446 isolate->factory()->hash_table_map(),
449 Label slow_pop_receiver;
450 // Push receiver on the stack to free up a register for the dictionary
453 __ LoadFromNumberDictionary(&slow_pop_receiver, eax, ecx, ebx, edx, edi, eax);
454 // Pop receiver before returning.
458 __ bind(&slow_pop_receiver);
459 // Pop the receiver from the stack and jump to runtime.
463 // Slow case: jump to runtime.
466 __ IncrementCounter(counters->keyed_load_generic_slow(), 1);
467 GenerateRuntimeGetProperty(masm);
469 __ bind(&check_name);
470 GenerateKeyNameCheck(masm, ecx, eax, ebx, &index_name, &slow);
472 GenerateKeyedLoadReceiverCheck(
473 masm, edx, eax, Map::kHasNamedInterceptor, &slow);
475 // If the receiver is a fast-case object, check the keyed lookup
476 // cache. Otherwise probe the dictionary.
477 __ mov(ebx, FieldOperand(edx, JSObject::kPropertiesOffset));
478 __ cmp(FieldOperand(ebx, HeapObject::kMapOffset),
479 Immediate(isolate->factory()->hash_table_map()));
480 __ j(equal, &probe_dictionary);
482 // The receiver's map is still in eax, compute the keyed lookup cache hash
483 // based on 32 bits of the map pointer and the string hash.
484 if (FLAG_debug_code) {
485 __ cmp(eax, FieldOperand(edx, HeapObject::kMapOffset));
486 __ Check(equal, kMapIsNoLongerInEax);
488 __ mov(ebx, eax); // Keep the map around for later.
489 __ shr(eax, KeyedLookupCache::kMapHashShift);
490 __ mov(edi, FieldOperand(ecx, String::kHashFieldOffset));
491 __ shr(edi, String::kHashShift);
493 __ and_(eax, KeyedLookupCache::kCapacityMask & KeyedLookupCache::kHashMask);
495 // Load the key (consisting of map and internalized string) from the cache and
497 Label load_in_object_property;
498 static const int kEntriesPerBucket = KeyedLookupCache::kEntriesPerBucket;
499 Label hit_on_nth_entry[kEntriesPerBucket];
500 ExternalReference cache_keys =
501 ExternalReference::keyed_lookup_cache_keys(masm->isolate());
503 for (int i = 0; i < kEntriesPerBucket - 1; i++) {
504 Label try_next_entry;
506 __ shl(edi, kPointerSizeLog2 + 1);
508 __ add(edi, Immediate(kPointerSize * i * 2));
510 __ cmp(ebx, Operand::StaticArray(edi, times_1, cache_keys));
511 __ j(not_equal, &try_next_entry);
512 __ add(edi, Immediate(kPointerSize));
513 __ cmp(ecx, Operand::StaticArray(edi, times_1, cache_keys));
514 __ j(equal, &hit_on_nth_entry[i]);
515 __ bind(&try_next_entry);
518 __ lea(edi, Operand(eax, 1));
519 __ shl(edi, kPointerSizeLog2 + 1);
520 __ add(edi, Immediate(kPointerSize * (kEntriesPerBucket - 1) * 2));
521 __ cmp(ebx, Operand::StaticArray(edi, times_1, cache_keys));
522 __ j(not_equal, &slow);
523 __ add(edi, Immediate(kPointerSize));
524 __ cmp(ecx, Operand::StaticArray(edi, times_1, cache_keys));
525 __ j(not_equal, &slow);
529 // ebx : receiver's map
531 // eax : lookup cache index
532 ExternalReference cache_field_offsets =
533 ExternalReference::keyed_lookup_cache_field_offsets(masm->isolate());
536 for (int i = kEntriesPerBucket - 1; i >= 0; i--) {
537 __ bind(&hit_on_nth_entry[i]);
539 __ add(eax, Immediate(i));
542 Operand::StaticArray(eax, times_pointer_size, cache_field_offsets));
543 __ movzx_b(eax, FieldOperand(ebx, Map::kInObjectPropertiesOffset));
545 __ j(above_equal, &property_array_property);
547 __ jmp(&load_in_object_property);
551 // Load in-object property.
552 __ bind(&load_in_object_property);
553 __ movzx_b(eax, FieldOperand(ebx, Map::kInstanceSizeOffset));
555 __ mov(eax, FieldOperand(edx, eax, times_pointer_size, 0));
556 __ IncrementCounter(counters->keyed_load_generic_lookup_cache(), 1);
559 // Load property array property.
560 __ bind(&property_array_property);
561 __ mov(eax, FieldOperand(edx, JSObject::kPropertiesOffset));
562 __ mov(eax, FieldOperand(eax, edi, times_pointer_size,
563 FixedArray::kHeaderSize));
564 __ IncrementCounter(counters->keyed_load_generic_lookup_cache(), 1);
567 // Do a quick inline probe of the receiver's dictionary, if it
569 __ bind(&probe_dictionary);
571 __ mov(eax, FieldOperand(edx, JSObject::kMapOffset));
572 __ movzx_b(eax, FieldOperand(eax, Map::kInstanceTypeOffset));
573 GenerateGlobalInstanceTypeCheck(masm, eax, &slow);
575 GenerateDictionaryLoad(masm, &slow, ebx, ecx, eax, edi, eax);
576 __ IncrementCounter(counters->keyed_load_generic_symbol(), 1);
579 __ bind(&index_name);
580 __ IndexFromHash(ebx, ecx);
581 // Now jump to the place where smi keys are handled.
586 void KeyedLoadIC::GenerateString(MacroAssembler* masm) {
587 // ----------- S t a t e -------------
588 // -- ecx : key (index)
590 // -- esp[0] : return address
591 // -----------------------------------
594 Register receiver = edx;
595 Register index = ecx;
596 Register scratch = ebx;
597 Register result = eax;
599 StringCharAtGenerator char_at_generator(receiver,
603 &miss, // When not a string.
604 &miss, // When not a number.
605 &miss, // When index out of range.
606 STRING_INDEX_IS_ARRAY_INDEX);
607 char_at_generator.GenerateFast(masm);
610 StubRuntimeCallHelper call_helper;
611 char_at_generator.GenerateSlow(masm, call_helper);
618 void KeyedLoadIC::GenerateIndexedInterceptor(MacroAssembler* masm) {
619 // ----------- S t a t e -------------
622 // -- esp[0] : return address
623 // -----------------------------------
626 // Check that the receiver isn't a smi.
627 __ JumpIfSmi(edx, &slow);
629 // Check that the key is an array index, that is Uint32.
630 __ test(ecx, Immediate(kSmiTagMask | kSmiSignMask));
631 __ j(not_zero, &slow);
633 // Get the map of the receiver.
634 __ mov(eax, FieldOperand(edx, HeapObject::kMapOffset));
636 // Check that it has indexed interceptor and access checks
637 // are not enabled for this object.
638 __ movzx_b(eax, FieldOperand(eax, Map::kBitFieldOffset));
639 __ and_(eax, Immediate(kSlowCaseBitFieldMask));
640 __ cmp(eax, Immediate(1 << Map::kHasIndexedInterceptor));
641 __ j(not_zero, &slow);
643 // Everything is fine, call runtime.
645 __ push(edx); // receiver
647 __ push(eax); // return address
649 // Perform tail call to the entry.
650 ExternalReference ref =
651 ExternalReference(IC_Utility(kKeyedLoadPropertyWithInterceptor),
653 __ TailCallExternalReference(ref, 2, 1);
660 void KeyedLoadIC::GenerateNonStrictArguments(MacroAssembler* masm) {
661 // ----------- S t a t e -------------
664 // -- esp[0] : return address
665 // -----------------------------------
667 Factory* factory = masm->isolate()->factory();
668 Operand mapped_location =
669 GenerateMappedArgumentsLookup(masm, edx, ecx, ebx, eax, ¬in, &slow);
670 __ mov(eax, mapped_location);
673 // The unmapped lookup expects that the parameter map is in ebx.
674 Operand unmapped_location =
675 GenerateUnmappedArgumentsLookup(masm, ecx, ebx, eax, &slow);
676 __ cmp(unmapped_location, factory->the_hole_value());
678 __ mov(eax, unmapped_location);
685 void KeyedStoreIC::GenerateNonStrictArguments(MacroAssembler* masm) {
686 // ----------- S t a t e -------------
690 // -- esp[0] : return address
691 // -----------------------------------
693 Operand mapped_location =
694 GenerateMappedArgumentsLookup(masm, edx, ecx, ebx, edi, ¬in, &slow);
695 __ mov(mapped_location, eax);
696 __ lea(ecx, mapped_location);
698 __ RecordWrite(ebx, ecx, edx, kDontSaveFPRegs);
701 // The unmapped lookup expects that the parameter map is in ebx.
702 Operand unmapped_location =
703 GenerateUnmappedArgumentsLookup(masm, ecx, ebx, edi, &slow);
704 __ mov(unmapped_location, eax);
705 __ lea(edi, unmapped_location);
707 __ RecordWrite(ebx, edi, edx, kDontSaveFPRegs);
714 static void KeyedStoreGenerateGenericHelper(
715 MacroAssembler* masm,
719 KeyedStoreCheckMap check_map,
720 KeyedStoreIncrementLength increment_length) {
721 Label transition_smi_elements;
722 Label finish_object_store, non_double_value, transition_double_elements;
723 Label fast_double_without_map_check;
727 // ebx: FixedArray receiver->elements
729 // Fast case: Do the store, could either Object or double.
730 __ bind(fast_object);
731 if (check_map == kCheckMap) {
732 __ mov(edi, FieldOperand(ebx, HeapObject::kMapOffset));
733 __ cmp(edi, masm->isolate()->factory()->fixed_array_map());
734 __ j(not_equal, fast_double);
737 // HOLECHECK: guards "A[i] = V"
738 // We have to go to the runtime if the current value is the hole because
739 // there may be a callback on the element
740 Label holecheck_passed1;
741 __ cmp(FixedArrayElementOperand(ebx, ecx),
742 masm->isolate()->factory()->the_hole_value());
743 __ j(not_equal, &holecheck_passed1);
744 __ JumpIfDictionaryInPrototypeChain(edx, ebx, edi, slow);
745 __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
747 __ bind(&holecheck_passed1);
749 // Smi stores don't require further checks.
751 __ JumpIfNotSmi(eax, &non_smi_value);
752 if (increment_length == kIncrementLength) {
753 // Add 1 to receiver->length.
754 __ add(FieldOperand(edx, JSArray::kLengthOffset),
755 Immediate(Smi::FromInt(1)));
757 // It's irrelevant whether array is smi-only or not when writing a smi.
758 __ mov(FixedArrayElementOperand(ebx, ecx), eax);
761 __ bind(&non_smi_value);
762 // Escape to elements kind transition case.
763 __ mov(edi, FieldOperand(edx, HeapObject::kMapOffset));
764 __ CheckFastObjectElements(edi, &transition_smi_elements);
766 // Fast elements array, store the value to the elements backing store.
767 __ bind(&finish_object_store);
768 if (increment_length == kIncrementLength) {
769 // Add 1 to receiver->length.
770 __ add(FieldOperand(edx, JSArray::kLengthOffset),
771 Immediate(Smi::FromInt(1)));
773 __ mov(FixedArrayElementOperand(ebx, ecx), eax);
774 // Update write barrier for the elements array address.
775 __ mov(edx, eax); // Preserve the value which is returned.
777 ebx, edx, ecx, kDontSaveFPRegs, EMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
780 __ bind(fast_double);
781 if (check_map == kCheckMap) {
782 // Check for fast double array case. If this fails, call through to the
784 __ cmp(edi, masm->isolate()->factory()->fixed_double_array_map());
785 __ j(not_equal, slow);
786 // If the value is a number, store it as a double in the FastDoubleElements
790 // HOLECHECK: guards "A[i] double hole?"
791 // We have to see if the double version of the hole is present. If so
792 // go to the runtime.
793 uint32_t offset = FixedDoubleArray::kHeaderSize + sizeof(kHoleNanLower32);
794 __ cmp(FieldOperand(ebx, ecx, times_4, offset), Immediate(kHoleNanUpper32));
795 __ j(not_equal, &fast_double_without_map_check);
796 __ JumpIfDictionaryInPrototypeChain(edx, ebx, edi, slow);
797 __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
799 __ bind(&fast_double_without_map_check);
800 __ StoreNumberToDoubleElements(eax, ebx, ecx, edi, xmm0,
801 &transition_double_elements, false);
802 if (increment_length == kIncrementLength) {
803 // Add 1 to receiver->length.
804 __ add(FieldOperand(edx, JSArray::kLengthOffset),
805 Immediate(Smi::FromInt(1)));
809 __ bind(&transition_smi_elements);
810 __ mov(ebx, FieldOperand(edx, HeapObject::kMapOffset));
812 // Transition the array appropriately depending on the value type.
814 masm->isolate()->factory()->heap_number_map(),
818 // Value is a double. Transition FAST_SMI_ELEMENTS -> FAST_DOUBLE_ELEMENTS
819 // and complete the store.
820 __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
821 FAST_DOUBLE_ELEMENTS,
825 AllocationSiteMode mode = AllocationSite::GetMode(FAST_SMI_ELEMENTS,
826 FAST_DOUBLE_ELEMENTS);
827 ElementsTransitionGenerator::GenerateSmiToDouble(masm, mode, slow);
828 __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
829 __ jmp(&fast_double_without_map_check);
831 __ bind(&non_double_value);
832 // Value is not a double, FAST_SMI_ELEMENTS -> FAST_ELEMENTS
833 __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
838 mode = AllocationSite::GetMode(FAST_SMI_ELEMENTS, FAST_ELEMENTS);
839 ElementsTransitionGenerator::GenerateMapChangeElementsTransition(masm, mode,
841 __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
842 __ jmp(&finish_object_store);
844 __ bind(&transition_double_elements);
845 // Elements are FAST_DOUBLE_ELEMENTS, but value is an Object that's not a
846 // HeapNumber. Make sure that the receiver is a Array with FAST_ELEMENTS and
847 // transition array from FAST_DOUBLE_ELEMENTS to FAST_ELEMENTS
848 __ mov(ebx, FieldOperand(edx, HeapObject::kMapOffset));
849 __ LoadTransitionedArrayMapConditional(FAST_DOUBLE_ELEMENTS,
854 mode = AllocationSite::GetMode(FAST_DOUBLE_ELEMENTS, FAST_ELEMENTS);
855 ElementsTransitionGenerator::GenerateDoubleToObject(masm, mode, slow);
856 __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
857 __ jmp(&finish_object_store);
861 void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
862 StrictModeFlag strict_mode) {
863 // ----------- S t a t e -------------
867 // -- esp[0] : return address
868 // -----------------------------------
869 Label slow, fast_object, fast_object_grow;
870 Label fast_double, fast_double_grow;
871 Label array, extra, check_if_double_array;
873 // Check that the object isn't a smi.
874 __ JumpIfSmi(edx, &slow);
875 // Get the map from the receiver.
876 __ mov(edi, FieldOperand(edx, HeapObject::kMapOffset));
877 // Check that the receiver does not require access checks and is not observed.
878 // The generic stub does not perform map checks or handle observed objects.
879 __ test_b(FieldOperand(edi, Map::kBitFieldOffset),
880 1 << Map::kIsAccessCheckNeeded | 1 << Map::kIsObserved);
881 __ j(not_zero, &slow);
882 // Check that the key is a smi.
883 __ JumpIfNotSmi(ecx, &slow);
884 __ CmpInstanceType(edi, JS_ARRAY_TYPE);
886 // Check that the object is some kind of JSObject.
887 __ CmpInstanceType(edi, FIRST_JS_OBJECT_TYPE);
890 // Object case: Check key against length in the elements array.
895 __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
896 // Check array bounds. Both the key and the length of FixedArray are smis.
897 __ cmp(ecx, FieldOperand(ebx, FixedArray::kLengthOffset));
898 __ j(below, &fast_object);
900 // Slow case: call runtime.
902 GenerateRuntimeSetProperty(masm, strict_mode);
904 // Extra capacity case: Check if there is extra capacity to
905 // perform the store and update the length. Used for adding one
906 // element to the array by writing to array[array.length].
909 // edx: receiver, a JSArray
911 // ebx: receiver->elements, a FixedArray
913 // flags: compare (ecx, edx.length())
914 // do not leave holes in the array:
915 __ j(not_equal, &slow);
916 __ cmp(ecx, FieldOperand(ebx, FixedArray::kLengthOffset));
917 __ j(above_equal, &slow);
918 __ mov(edi, FieldOperand(ebx, HeapObject::kMapOffset));
919 __ cmp(edi, masm->isolate()->factory()->fixed_array_map());
920 __ j(not_equal, &check_if_double_array);
921 __ jmp(&fast_object_grow);
923 __ bind(&check_if_double_array);
924 __ cmp(edi, masm->isolate()->factory()->fixed_double_array_map());
925 __ j(not_equal, &slow);
926 __ jmp(&fast_double_grow);
928 // Array case: Get the length and the elements array from the JS
929 // array. Check that the array is in fast mode (and writable); if it
930 // is the length is always a smi.
933 // edx: receiver, a JSArray
936 __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
938 // Check the key against the length in the array and fall through to the
939 // common store code.
940 __ cmp(ecx, FieldOperand(edx, JSArray::kLengthOffset)); // Compare smis.
941 __ j(above_equal, &extra);
943 KeyedStoreGenerateGenericHelper(masm, &fast_object, &fast_double,
944 &slow, kCheckMap, kDontIncrementLength);
945 KeyedStoreGenerateGenericHelper(masm, &fast_object_grow, &fast_double_grow,
946 &slow, kDontCheckMap, kIncrementLength);
950 void LoadIC::GenerateMegamorphic(MacroAssembler* masm,
951 ExtraICState extra_state) {
952 // ----------- S t a t e -------------
955 // -- esp[0] : return address
956 // -----------------------------------
958 // Probe the stub cache.
959 Code::Flags flags = Code::ComputeFlags(
960 Code::HANDLER, MONOMORPHIC, extra_state,
961 Code::NORMAL, Code::LOAD_IC);
962 masm->isolate()->stub_cache()->GenerateProbe(
963 masm, flags, edx, ecx, ebx, eax);
965 // Cache miss: Jump to runtime.
970 void LoadIC::GenerateNormal(MacroAssembler* masm) {
971 // ----------- S t a t e -------------
974 // -- esp[0] : return address
975 // -----------------------------------
978 GenerateNameDictionaryReceiverCheck(masm, edx, eax, ebx, &miss);
981 // Search the dictionary placing the result in eax.
982 GenerateDictionaryLoad(masm, &miss, eax, ecx, edi, ebx, eax);
985 // Cache miss: Jump to runtime.
991 void LoadIC::GenerateMiss(MacroAssembler* masm) {
992 // ----------- S t a t e -------------
995 // -- esp[0] : return address
996 // -----------------------------------
998 __ IncrementCounter(masm->isolate()->counters()->load_miss(), 1);
1001 __ push(edx); // receiver
1002 __ push(ecx); // name
1003 __ push(ebx); // return address
1005 // Perform tail call to the entry.
1006 ExternalReference ref =
1007 ExternalReference(IC_Utility(kLoadIC_Miss), masm->isolate());
1008 __ TailCallExternalReference(ref, 2, 1);
1012 void LoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm) {
1013 // ----------- S t a t e -------------
1015 // -- edx : receiver
1016 // -- esp[0] : return address
1017 // -----------------------------------
1020 __ push(edx); // receiver
1021 __ push(ecx); // name
1022 __ push(ebx); // return address
1024 // Perform tail call to the entry.
1025 __ TailCallRuntime(Runtime::kGetProperty, 2, 1);
1029 void KeyedLoadIC::GenerateMiss(MacroAssembler* masm) {
1030 // ----------- S t a t e -------------
1032 // -- edx : receiver
1033 // -- esp[0] : return address
1034 // -----------------------------------
1036 __ IncrementCounter(masm->isolate()->counters()->keyed_load_miss(), 1);
1039 __ push(edx); // receiver
1040 __ push(ecx); // name
1041 __ push(ebx); // return address
1043 // Perform tail call to the entry.
1044 ExternalReference ref =
1045 ExternalReference(IC_Utility(kKeyedLoadIC_Miss), masm->isolate());
1046 __ TailCallExternalReference(ref, 2, 1);
1050 void KeyedLoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm) {
1051 // ----------- S t a t e -------------
1053 // -- edx : receiver
1054 // -- esp[0] : return address
1055 // -----------------------------------
1058 __ push(edx); // receiver
1059 __ push(ecx); // name
1060 __ push(ebx); // return address
1062 // Perform tail call to the entry.
1063 __ TailCallRuntime(Runtime::kKeyedGetProperty, 2, 1);
1067 void StoreIC::GenerateMegamorphic(MacroAssembler* masm,
1068 ExtraICState extra_ic_state) {
1069 // ----------- S t a t e -------------
1072 // -- edx : receiver
1073 // -- esp[0] : return address
1074 // -----------------------------------
1075 Code::Flags flags = Code::ComputeFlags(
1076 Code::HANDLER, MONOMORPHIC, extra_ic_state,
1077 Code::NORMAL, Code::STORE_IC);
1078 masm->isolate()->stub_cache()->GenerateProbe(
1079 masm, flags, edx, ecx, ebx, no_reg);
1081 // Cache miss: Jump to runtime.
1086 void StoreIC::GenerateMiss(MacroAssembler* masm) {
1087 // ----------- S t a t e -------------
1090 // -- edx : receiver
1091 // -- esp[0] : return address
1092 // -----------------------------------
1100 // Perform tail call to the entry.
1101 ExternalReference ref =
1102 ExternalReference(IC_Utility(kStoreIC_Miss), masm->isolate());
1103 __ TailCallExternalReference(ref, 3, 1);
1107 void StoreIC::GenerateNormal(MacroAssembler* masm) {
1108 // ----------- S t a t e -------------
1111 // -- edx : receiver
1112 // -- esp[0] : return address
1113 // -----------------------------------
1115 Label miss, restore_miss;
1117 GenerateNameDictionaryReceiverCheck(masm, edx, ebx, edi, &miss);
1119 // A lot of registers are needed for storing to slow case
1120 // objects. Push and restore receiver but rely on
1121 // GenerateDictionaryStore preserving the value and name.
1123 GenerateDictionaryStore(masm, &restore_miss, ebx, ecx, eax, edx, edi);
1125 Counters* counters = masm->isolate()->counters();
1126 __ IncrementCounter(counters->store_normal_hit(), 1);
1129 __ bind(&restore_miss);
1133 __ IncrementCounter(counters->store_normal_miss(), 1);
1138 void StoreIC::GenerateRuntimeSetProperty(MacroAssembler* masm,
1139 StrictModeFlag strict_mode) {
1140 // ----------- S t a t e -------------
1143 // -- edx : receiver
1144 // -- esp[0] : return address
1145 // -----------------------------------
1150 __ push(Immediate(Smi::FromInt(NONE))); // PropertyAttributes
1151 __ push(Immediate(Smi::FromInt(strict_mode)));
1152 __ push(ebx); // return address
1154 // Do tail-call to runtime routine.
1155 __ TailCallRuntime(Runtime::kSetProperty, 5, 1);
1159 void KeyedStoreIC::GenerateRuntimeSetProperty(MacroAssembler* masm,
1160 StrictModeFlag strict_mode) {
1161 // ----------- S t a t e -------------
1164 // -- edx : receiver
1165 // -- esp[0] : return address
1166 // -----------------------------------
1172 __ push(Immediate(Smi::FromInt(NONE))); // PropertyAttributes
1173 __ push(Immediate(Smi::FromInt(strict_mode))); // Strict mode.
1174 __ push(ebx); // return address
1176 // Do tail-call to runtime routine.
1177 __ TailCallRuntime(Runtime::kSetProperty, 5, 1);
1181 void KeyedStoreIC::GenerateMiss(MacroAssembler* masm) {
1182 // ----------- S t a t e -------------
1185 // -- edx : receiver
1186 // -- esp[0] : return address
1187 // -----------------------------------
1195 // Do tail-call to runtime routine.
1196 ExternalReference ref =
1197 ExternalReference(IC_Utility(kKeyedStoreIC_Miss), masm->isolate());
1198 __ TailCallExternalReference(ref, 3, 1);
1202 void StoreIC::GenerateSlow(MacroAssembler* masm) {
1203 // ----------- S t a t e -------------
1206 // -- edx : receiver
1207 // -- esp[0] : return address
1208 // -----------------------------------
1214 __ push(ebx); // return address
1216 // Do tail-call to runtime routine.
1217 ExternalReference ref(IC_Utility(kStoreIC_Slow), masm->isolate());
1218 __ TailCallExternalReference(ref, 3, 1);
1222 void KeyedStoreIC::GenerateSlow(MacroAssembler* masm) {
1223 // ----------- S t a t e -------------
1226 // -- edx : receiver
1227 // -- esp[0] : return address
1228 // -----------------------------------
1234 __ push(ebx); // return address
1236 // Do tail-call to runtime routine.
1237 ExternalReference ref(IC_Utility(kKeyedStoreIC_Slow), masm->isolate());
1238 __ TailCallExternalReference(ref, 3, 1);
1245 Condition CompareIC::ComputeCondition(Token::Value op) {
1247 case Token::EQ_STRICT:
1257 return greater_equal;
1260 return no_condition;
1265 bool CompareIC::HasInlinedSmiCode(Address address) {
1266 // The address of the instruction following the call.
1267 Address test_instruction_address =
1268 address + Assembler::kCallTargetAddressOffset;
1270 // If the instruction following the call is not a test al, nothing
1272 return *test_instruction_address == Assembler::kTestAlByte;
1276 void PatchInlinedSmiCode(Address address, InlinedSmiCheck check) {
1277 // The address of the instruction following the call.
1278 Address test_instruction_address =
1279 address + Assembler::kCallTargetAddressOffset;
1281 // If the instruction following the call is not a test al, nothing
1283 if (*test_instruction_address != Assembler::kTestAlByte) {
1284 ASSERT(*test_instruction_address == Assembler::kNopByte);
1288 Address delta_address = test_instruction_address + 1;
1289 // The delta to the start of the map check instruction and the
1290 // condition code uses at the patched jump.
1291 int8_t delta = *reinterpret_cast<int8_t*>(delta_address);
1292 if (FLAG_trace_ic) {
1293 PrintF("[ patching ic at %p, test=%p, delta=%d\n",
1294 address, test_instruction_address, delta);
1297 // Patch with a short conditional jump. Enabling means switching from a short
1298 // jump-if-carry/not-carry to jump-if-zero/not-zero, whereas disabling is the
1299 // reverse operation of that.
1300 Address jmp_address = test_instruction_address - delta;
1301 ASSERT((check == ENABLE_INLINED_SMI_CHECK)
1302 ? (*jmp_address == Assembler::kJncShortOpcode ||
1303 *jmp_address == Assembler::kJcShortOpcode)
1304 : (*jmp_address == Assembler::kJnzShortOpcode ||
1305 *jmp_address == Assembler::kJzShortOpcode));
1306 Condition cc = (check == ENABLE_INLINED_SMI_CHECK)
1307 ? (*jmp_address == Assembler::kJncShortOpcode ? not_zero : zero)
1308 : (*jmp_address == Assembler::kJnzShortOpcode ? not_carry : carry);
1309 *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | cc);
1313 } } // namespace v8::internal
1315 #endif // V8_TARGET_ARCH_IA32