| // Copyright 2006-2008 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "v8.h" |
| |
| #include "codegen-inl.h" |
| #include "ic-inl.h" |
| #include "runtime.h" |
| #include "stub-cache.h" |
| #include "utils.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // ---------------------------------------------------------------------------- |
| // Static IC stub generators. |
| // |
| |
| #define __ ACCESS_MASM(masm) |
| |
| |
| // Helper function used to load a property from a dictionary backing storage. |
| // This function may return false negatives, so miss_label |
| // must always call a backup property load that is complete. |
| // This function is safe to call if the receiver has fast properties, |
| // or if name is not a symbol, and will jump to the miss_label in that case. |
| static void GenerateDictionaryLoad(MacroAssembler* masm, |
| Label* miss_label, |
| Register receiver, |
| Register name, |
| Register r0, |
| Register r1, |
| Register r2, |
| DictionaryCheck check_dictionary) { |
| // Register use: |
| // |
| // name - holds the name of the property and is unchanged. |
| // receiver - holds the receiver and is unchanged. |
| // Scratch registers: |
| // r0 - used to hold the property dictionary. |
| // |
| // r1 - used for the index into the property dictionary |
| // - holds the result on exit. |
| // |
| // r2 - used to hold the capacity of the property dictionary. |
| |
| Label done; |
| |
| // Check for the absence of an interceptor. |
| // Load the map into r0. |
| __ mov(r0, FieldOperand(receiver, JSObject::kMapOffset)); |
| |
| // Bail out if the receiver has a named interceptor. |
| __ test(FieldOperand(r0, Map::kBitFieldOffset), |
| Immediate(1 << Map::kHasNamedInterceptor)); |
| __ j(not_zero, miss_label, not_taken); |
| |
| // Bail out if we have a JS global proxy object. |
| __ movzx_b(r0, FieldOperand(r0, Map::kInstanceTypeOffset)); |
| __ cmp(r0, JS_GLOBAL_PROXY_TYPE); |
| __ j(equal, miss_label, not_taken); |
| |
| // Possible work-around for http://crbug.com/16276. |
| __ cmp(r0, JS_GLOBAL_OBJECT_TYPE); |
| __ j(equal, miss_label, not_taken); |
| __ cmp(r0, JS_BUILTINS_OBJECT_TYPE); |
| __ j(equal, miss_label, not_taken); |
| |
| // Load properties array. |
| __ mov(r0, FieldOperand(receiver, JSObject::kPropertiesOffset)); |
| |
| // Check that the properties array is a dictionary. |
| if (check_dictionary == CHECK_DICTIONARY) { |
| __ cmp(FieldOperand(r0, HeapObject::kMapOffset), |
| Immediate(Factory::hash_table_map())); |
| __ j(not_equal, miss_label); |
| } |
| |
| // Compute the capacity mask. |
| const int kCapacityOffset = |
| StringDictionary::kHeaderSize + |
| StringDictionary::kCapacityIndex * kPointerSize; |
| __ mov(r2, FieldOperand(r0, kCapacityOffset)); |
| __ shr(r2, kSmiTagSize); // convert smi to int |
| __ dec(r2); |
| |
| // Generate an unrolled loop that performs a few probes before |
| // giving up. Measurements done on Gmail indicate that 2 probes |
| // cover ~93% of loads from dictionaries. |
| static const int kProbes = 4; |
| const int kElementsStartOffset = |
| StringDictionary::kHeaderSize + |
| StringDictionary::kElementsStartIndex * kPointerSize; |
| for (int i = 0; i < kProbes; i++) { |
| // Compute the masked index: (hash + i + i * i) & mask. |
| __ mov(r1, FieldOperand(name, String::kHashFieldOffset)); |
| __ shr(r1, String::kHashShift); |
| if (i > 0) { |
| __ add(Operand(r1), Immediate(StringDictionary::GetProbeOffset(i))); |
| } |
| __ and_(r1, Operand(r2)); |
| |
| // Scale the index by multiplying by the entry size. |
| ASSERT(StringDictionary::kEntrySize == 3); |
| __ lea(r1, Operand(r1, r1, times_2, 0)); // r1 = r1 * 3 |
| |
| // Check if the key is identical to the name. |
| __ cmp(name, |
| Operand(r0, r1, times_4, kElementsStartOffset - kHeapObjectTag)); |
| if (i != kProbes - 1) { |
| __ j(equal, &done, taken); |
| } else { |
| __ j(not_equal, miss_label, not_taken); |
| } |
| } |
| |
| // Check that the value is a normal property. |
| __ bind(&done); |
| const int kDetailsOffset = kElementsStartOffset + 2 * kPointerSize; |
| __ test(Operand(r0, r1, times_4, kDetailsOffset - kHeapObjectTag), |
| Immediate(PropertyDetails::TypeField::mask() << kSmiTagSize)); |
| __ j(not_zero, miss_label, not_taken); |
| |
| // Get the value at the masked, scaled index. |
| const int kValueOffset = kElementsStartOffset + kPointerSize; |
| __ mov(r1, Operand(r0, r1, times_4, kValueOffset - kHeapObjectTag)); |
| } |
| |
| |
| static void GenerateNumberDictionaryLoad(MacroAssembler* masm, |
| Label* miss, |
| Register elements, |
| Register key, |
| Register r0, |
| Register r1, |
| Register r2) { |
| // Register use: |
| // |
| // elements - holds the slow-case elements of the receiver and is unchanged. |
| // |
| // key - holds the smi key on entry and is unchanged if a branch is |
| // performed to the miss label. If the load succeeds and we |
| // fall through, key holds the result on exit. |
| // |
| // Scratch registers: |
| // |
| // r0 - holds the untagged key on entry and holds the hash once computed. |
| // |
| // r1 - used to hold the capacity mask of the dictionary |
| // |
| // r2 - used for the index into the dictionary. |
| Label done; |
| |
| // Compute the hash code from the untagged key. This must be kept in sync |
| // with ComputeIntegerHash in utils.h. |
| // |
| // hash = ~hash + (hash << 15); |
| __ mov(r1, r0); |
| __ not_(r0); |
| __ shl(r1, 15); |
| __ add(r0, Operand(r1)); |
| // hash = hash ^ (hash >> 12); |
| __ mov(r1, r0); |
| __ shr(r1, 12); |
| __ xor_(r0, Operand(r1)); |
| // hash = hash + (hash << 2); |
| __ lea(r0, Operand(r0, r0, times_4, 0)); |
| // hash = hash ^ (hash >> 4); |
| __ mov(r1, r0); |
| __ shr(r1, 4); |
| __ xor_(r0, Operand(r1)); |
| // hash = hash * 2057; |
| __ imul(r0, r0, 2057); |
| // hash = hash ^ (hash >> 16); |
| __ mov(r1, r0); |
| __ shr(r1, 16); |
| __ xor_(r0, Operand(r1)); |
| |
| // Compute capacity mask. |
| __ mov(r1, FieldOperand(elements, NumberDictionary::kCapacityOffset)); |
| __ shr(r1, kSmiTagSize); // convert smi to int |
| __ dec(r1); |
| |
| // Generate an unrolled loop that performs a few probes before giving up. |
| const int kProbes = 4; |
| for (int i = 0; i < kProbes; i++) { |
| // Use r2 for index calculations and keep the hash intact in r0. |
| __ mov(r2, r0); |
| // Compute the masked index: (hash + i + i * i) & mask. |
| if (i > 0) { |
| __ add(Operand(r2), Immediate(NumberDictionary::GetProbeOffset(i))); |
| } |
| __ and_(r2, Operand(r1)); |
| |
| // Scale the index by multiplying by the entry size. |
| ASSERT(NumberDictionary::kEntrySize == 3); |
| __ lea(r2, Operand(r2, r2, times_2, 0)); // r2 = r2 * 3 |
| |
| // Check if the key matches. |
| __ cmp(key, FieldOperand(elements, |
| r2, |
| times_pointer_size, |
| NumberDictionary::kElementsStartOffset)); |
| if (i != (kProbes - 1)) { |
| __ j(equal, &done, taken); |
| } else { |
| __ j(not_equal, miss, not_taken); |
| } |
| } |
| |
| __ bind(&done); |
| // Check that the value is a normal propety. |
| const int kDetailsOffset = |
| NumberDictionary::kElementsStartOffset + 2 * kPointerSize; |
| ASSERT_EQ(NORMAL, 0); |
| __ test(FieldOperand(elements, r2, times_pointer_size, kDetailsOffset), |
| Immediate(PropertyDetails::TypeField::mask() << kSmiTagSize)); |
| __ j(not_zero, miss); |
| |
| // Get the value at the masked, scaled index. |
| const int kValueOffset = |
| NumberDictionary::kElementsStartOffset + kPointerSize; |
| __ mov(key, FieldOperand(elements, r2, times_pointer_size, kValueOffset)); |
| } |
| |
| |
| // The offset from the inlined patch site to the start of the |
| // inlined load instruction. It is 7 bytes (test eax, imm) plus |
| // 6 bytes (jne slow_label). |
| const int LoadIC::kOffsetToLoadInstruction = 13; |
| |
| |
| void LoadIC::GenerateArrayLength(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : receiver |
| // -- ecx : name |
| // -- esp[0] : return address |
| // ----------------------------------- |
| Label miss; |
| |
| StubCompiler::GenerateLoadArrayLength(masm, eax, edx, &miss); |
| __ bind(&miss); |
| StubCompiler::GenerateLoadMiss(masm, Code::LOAD_IC); |
| } |
| |
| |
| void LoadIC::GenerateStringLength(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : receiver |
| // -- ecx : name |
| // -- esp[0] : return address |
| // ----------------------------------- |
| Label miss; |
| |
| StubCompiler::GenerateLoadStringLength(masm, eax, edx, ebx, &miss); |
| __ bind(&miss); |
| StubCompiler::GenerateLoadMiss(masm, Code::LOAD_IC); |
| } |
| |
| |
| void LoadIC::GenerateFunctionPrototype(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : receiver |
| // -- ecx : name |
| // -- esp[0] : return address |
| // ----------------------------------- |
| Label miss; |
| |
| StubCompiler::GenerateLoadFunctionPrototype(masm, eax, edx, ebx, &miss); |
| __ bind(&miss); |
| StubCompiler::GenerateLoadMiss(masm, Code::LOAD_IC); |
| } |
| |
| |
| void KeyedLoadIC::GenerateGeneric(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : key |
| // -- edx : receiver |
| // -- esp[0] : return address |
| // ----------------------------------- |
| Label slow, check_string, index_int, index_string; |
| Label check_pixel_array, probe_dictionary; |
| Label check_number_dictionary; |
| |
| // Check that the object isn't a smi. |
| __ test(edx, Immediate(kSmiTagMask)); |
| __ j(zero, &slow, not_taken); |
| |
| // Get the map of the receiver. |
| __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset)); |
| |
| // Check bit field. |
| __ movzx_b(ebx, FieldOperand(ecx, Map::kBitFieldOffset)); |
| __ test(ebx, Immediate(kSlowCaseBitFieldMask)); |
| __ j(not_zero, &slow, not_taken); |
| // Check that the object is some kind of JS object EXCEPT JS Value type. |
| // In the case that the object is a value-wrapper object, |
| // we enter the runtime system to make sure that indexing |
| // into string objects work as intended. |
| ASSERT(JS_OBJECT_TYPE > JS_VALUE_TYPE); |
| __ CmpInstanceType(ecx, JS_OBJECT_TYPE); |
| __ j(below, &slow, not_taken); |
| // Check that the key is a smi. |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(not_zero, &check_string, not_taken); |
| __ mov(ebx, eax); |
| __ SmiUntag(ebx); |
| // Get the elements array of the object. |
| __ bind(&index_int); |
| __ mov(ecx, FieldOperand(edx, JSObject::kElementsOffset)); |
| // Check that the object is in fast mode (not dictionary). |
| __ CheckMap(ecx, Factory::fixed_array_map(), &check_pixel_array, true); |
| // Check that the key (index) is within bounds. |
| __ cmp(ebx, FieldOperand(ecx, FixedArray::kLengthOffset)); |
| __ j(above_equal, &slow); |
| // Fast case: Do the load. |
| __ mov(ecx, FieldOperand(ecx, ebx, times_4, FixedArray::kHeaderSize)); |
| __ cmp(Operand(ecx), Immediate(Factory::the_hole_value())); |
| // In case the loaded value is the_hole we have to consult GetProperty |
| // to ensure the prototype chain is searched. |
| __ j(equal, &slow); |
| __ mov(eax, ecx); |
| __ IncrementCounter(&Counters::keyed_load_generic_smi, 1); |
| __ ret(0); |
| |
| __ bind(&check_pixel_array); |
| // Check whether the elements is a pixel array. |
| // edx: receiver |
| // ebx: untagged index |
| // eax: key |
| // ecx: elements |
| __ CheckMap(ecx, Factory::pixel_array_map(), &check_number_dictionary, true); |
| __ cmp(ebx, FieldOperand(ecx, PixelArray::kLengthOffset)); |
| __ j(above_equal, &slow); |
| __ mov(eax, FieldOperand(ecx, PixelArray::kExternalPointerOffset)); |
| __ movzx_b(eax, Operand(eax, ebx, times_1, 0)); |
| __ SmiTag(eax); |
| __ ret(0); |
| |
| __ bind(&check_number_dictionary); |
| // Check whether the elements is a number dictionary. |
| // edx: receiver |
| // ebx: untagged index |
| // eax: key |
| // ecx: elements |
| __ CheckMap(ecx, Factory::hash_table_map(), &slow, true); |
| Label slow_pop_receiver; |
| // Push receiver on the stack to free up a register for the dictionary |
| // probing. |
| __ push(edx); |
| GenerateNumberDictionaryLoad(masm, |
| &slow_pop_receiver, |
| ecx, |
| eax, |
| ebx, |
| edx, |
| edi); |
| // Pop receiver before returning. |
| __ pop(edx); |
| __ ret(0); |
| |
| __ bind(&slow_pop_receiver); |
| // Pop the receiver from the stack and jump to runtime. |
| __ pop(edx); |
| |
| __ bind(&slow); |
| // Slow case: jump to runtime. |
| // edx: receiver |
| // eax: key |
| __ IncrementCounter(&Counters::keyed_load_generic_slow, 1); |
| GenerateRuntimeGetProperty(masm); |
| |
| __ bind(&check_string); |
| // The key is not a smi. |
| // Is it a string? |
| // edx: receiver |
| // eax: key |
| __ CmpObjectType(eax, FIRST_NONSTRING_TYPE, ecx); |
| __ j(above_equal, &slow); |
| // Is the string an array index, with cached numeric value? |
| __ mov(ebx, FieldOperand(eax, String::kHashFieldOffset)); |
| __ test(ebx, Immediate(String::kIsArrayIndexMask)); |
| __ j(not_zero, &index_string, not_taken); |
| |
| // Is the string a symbol? |
| __ movzx_b(ebx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| ASSERT(kSymbolTag != 0); |
| __ test(ebx, Immediate(kIsSymbolMask)); |
| __ j(zero, &slow, not_taken); |
| |
| // If the receiver is a fast-case object, check the keyed lookup |
| // cache. Otherwise probe the dictionary. |
| __ mov(ebx, FieldOperand(edx, JSObject::kPropertiesOffset)); |
| __ cmp(FieldOperand(ebx, HeapObject::kMapOffset), |
| Immediate(Factory::hash_table_map())); |
| __ j(equal, &probe_dictionary); |
| |
| // Load the map of the receiver, compute the keyed lookup cache hash |
| // based on 32 bits of the map pointer and the string hash. |
| __ mov(ebx, FieldOperand(edx, HeapObject::kMapOffset)); |
| __ mov(ecx, ebx); |
| __ shr(ecx, KeyedLookupCache::kMapHashShift); |
| __ mov(edi, FieldOperand(eax, String::kHashFieldOffset)); |
| __ shr(edi, String::kHashShift); |
| __ xor_(ecx, Operand(edi)); |
| __ and_(ecx, KeyedLookupCache::kCapacityMask); |
| |
| // Load the key (consisting of map and symbol) from the cache and |
| // check for match. |
| ExternalReference cache_keys |
| = ExternalReference::keyed_lookup_cache_keys(); |
| __ mov(edi, ecx); |
| __ shl(edi, kPointerSizeLog2 + 1); |
| __ cmp(ebx, Operand::StaticArray(edi, times_1, cache_keys)); |
| __ j(not_equal, &slow); |
| __ add(Operand(edi), Immediate(kPointerSize)); |
| __ cmp(eax, Operand::StaticArray(edi, times_1, cache_keys)); |
| __ j(not_equal, &slow); |
| |
| // Get field offset and check that it is an in-object property. |
| // edx : receiver |
| // ebx : receiver's map |
| // eax : key |
| // ecx : lookup cache index |
| ExternalReference cache_field_offsets |
| = ExternalReference::keyed_lookup_cache_field_offsets(); |
| __ mov(edi, |
| Operand::StaticArray(ecx, times_pointer_size, cache_field_offsets)); |
| __ movzx_b(ecx, FieldOperand(ebx, Map::kInObjectPropertiesOffset)); |
| __ cmp(edi, Operand(ecx)); |
| __ j(above_equal, &slow); |
| |
| // Load in-object property. |
| __ sub(edi, Operand(ecx)); |
| __ movzx_b(ecx, FieldOperand(ebx, Map::kInstanceSizeOffset)); |
| __ add(ecx, Operand(edi)); |
| __ mov(eax, FieldOperand(edx, ecx, times_pointer_size, 0)); |
| __ ret(0); |
| |
| // Do a quick inline probe of the receiver's dictionary, if it |
| // exists. |
| __ bind(&probe_dictionary); |
| GenerateDictionaryLoad(masm, |
| &slow, |
| edx, |
| eax, |
| ebx, |
| ecx, |
| edi, |
| DICTIONARY_CHECK_DONE); |
| __ mov(eax, ecx); |
| __ IncrementCounter(&Counters::keyed_load_generic_symbol, 1); |
| __ ret(0); |
| |
| // If the hash field contains an array index pick it out. The assert checks |
| // that the constants for the maximum number of digits for an array index |
| // cached in the hash field and the number of bits reserved for it does not |
| // conflict. |
| ASSERT(TenToThe(String::kMaxCachedArrayIndexLength) < |
| (1 << String::kArrayIndexValueBits)); |
| __ bind(&index_string); |
| __ and_(ebx, String::kArrayIndexHashMask); |
| __ shr(ebx, String::kHashShift); |
| __ jmp(&index_int); |
| } |
| |
| |
| void KeyedLoadIC::GenerateString(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : key (index) |
| // -- edx : receiver |
| // -- esp[0] : return address |
| // ----------------------------------- |
| Label miss; |
| Label index_not_smi; |
| Label index_out_of_range; |
| Label slow_char_code; |
| Label got_char_code; |
| |
| Register receiver = edx; |
| Register index = eax; |
| Register code = ebx; |
| Register scratch = ecx; |
| |
| StringHelper::GenerateFastCharCodeAt(masm, |
| receiver, |
| index, |
| scratch, |
| code, |
| &miss, // When not a string. |
| &index_not_smi, |
| &index_out_of_range, |
| &slow_char_code); |
| // If we didn't bail out, code register contains smi tagged char |
| // code. |
| __ bind(&got_char_code); |
| StringHelper::GenerateCharFromCode(masm, code, eax, JUMP_FUNCTION); |
| #ifdef DEBUG |
| __ Abort("Unexpected fall-through from char from code tail call"); |
| #endif |
| |
| // Check if key is a heap number. |
| __ bind(&index_not_smi); |
| __ CheckMap(index, Factory::heap_number_map(), &miss, true); |
| |
| // Push receiver and key on the stack (now that we know they are a |
| // string and a number), and call runtime. |
| __ bind(&slow_char_code); |
| __ EnterInternalFrame(); |
| __ push(receiver); |
| __ push(index); |
| __ CallRuntime(Runtime::kStringCharCodeAt, 2); |
| ASSERT(!code.is(eax)); |
| __ mov(code, eax); |
| __ LeaveInternalFrame(); |
| |
| // Check if the runtime call returned NaN char code. If yes, return |
| // undefined. Otherwise, we can continue. |
| if (FLAG_debug_code) { |
| ASSERT(kSmiTag == 0); |
| __ test(code, Immediate(kSmiTagMask)); |
| __ j(zero, &got_char_code); |
| __ mov(scratch, FieldOperand(code, HeapObject::kMapOffset)); |
| __ cmp(scratch, Factory::heap_number_map()); |
| __ Assert(equal, "StringCharCodeAt must return smi or heap number"); |
| } |
| __ cmp(code, Factory::nan_value()); |
| __ j(not_equal, &got_char_code); |
| __ bind(&index_out_of_range); |
| __ Set(eax, Immediate(Factory::undefined_value())); |
| __ ret(0); |
| |
| __ bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| |
| void KeyedLoadIC::GenerateExternalArray(MacroAssembler* masm, |
| ExternalArrayType array_type) { |
| // ----------- S t a t e ------------- |
| // -- eax : key |
| // -- edx : receiver |
| // -- esp[0] : return address |
| // ----------------------------------- |
| Label slow, failed_allocation; |
| |
| // Check that the object isn't a smi. |
| __ test(edx, Immediate(kSmiTagMask)); |
| __ j(zero, &slow, not_taken); |
| |
| // Check that the key is a smi. |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(not_zero, &slow, not_taken); |
| |
| // Get the map of the receiver. |
| __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset)); |
| // Check that the receiver does not require access checks. We need |
| // to check this explicitly since this generic stub does not perform |
| // map checks. |
| __ movzx_b(ebx, FieldOperand(ecx, Map::kBitFieldOffset)); |
| __ test(ebx, Immediate(1 << Map::kIsAccessCheckNeeded)); |
| __ j(not_zero, &slow, not_taken); |
| |
| __ CmpInstanceType(ecx, JS_OBJECT_TYPE); |
| __ j(not_equal, &slow, not_taken); |
| |
| // Check that the elements array is the appropriate type of |
| // ExternalArray. |
| __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset)); |
| Handle<Map> map(Heap::MapForExternalArrayType(array_type)); |
| __ cmp(FieldOperand(ebx, HeapObject::kMapOffset), |
| Immediate(map)); |
| __ j(not_equal, &slow, not_taken); |
| |
| // eax: key, known to be a smi. |
| // edx: receiver, known to be a JSObject. |
| // ebx: elements object, known to be an external array. |
| // Check that the index is in range. |
| __ mov(ecx, eax); |
| __ SmiUntag(ecx); // Untag the index. |
| __ cmp(ecx, FieldOperand(ebx, ExternalArray::kLengthOffset)); |
| // Unsigned comparison catches both negative and too-large values. |
| __ j(above_equal, &slow); |
| |
| __ mov(ebx, FieldOperand(ebx, ExternalArray::kExternalPointerOffset)); |
| // ebx: base pointer of external storage |
| switch (array_type) { |
| case kExternalByteArray: |
| __ movsx_b(ecx, Operand(ebx, ecx, times_1, 0)); |
| break; |
| case kExternalUnsignedByteArray: |
| __ movzx_b(ecx, Operand(ebx, ecx, times_1, 0)); |
| break; |
| case kExternalShortArray: |
| __ movsx_w(ecx, Operand(ebx, ecx, times_2, 0)); |
| break; |
| case kExternalUnsignedShortArray: |
| __ movzx_w(ecx, Operand(ebx, ecx, times_2, 0)); |
| break; |
| case kExternalIntArray: |
| case kExternalUnsignedIntArray: |
| __ mov(ecx, Operand(ebx, ecx, times_4, 0)); |
| break; |
| case kExternalFloatArray: |
| __ fld_s(Operand(ebx, ecx, times_4, 0)); |
| break; |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| |
| // For integer array types: |
| // ecx: value |
| // For floating-point array type: |
| // FP(0): value |
| |
| if (array_type == kExternalIntArray || |
| array_type == kExternalUnsignedIntArray) { |
| // For the Int and UnsignedInt array types, we need to see whether |
| // the value can be represented in a Smi. If not, we need to convert |
| // it to a HeapNumber. |
| Label box_int; |
| if (array_type == kExternalIntArray) { |
| __ cmp(ecx, 0xC0000000); |
| __ j(sign, &box_int); |
| } else { |
| ASSERT_EQ(array_type, kExternalUnsignedIntArray); |
| // The test is different for unsigned int values. Since we need |
| // the value to be in the range of a positive smi, we can't |
| // handle either of the top two bits being set in the value. |
| __ test(ecx, Immediate(0xC0000000)); |
| __ j(not_zero, &box_int); |
| } |
| |
| __ mov(eax, ecx); |
| __ SmiTag(eax); |
| __ ret(0); |
| |
| __ bind(&box_int); |
| |
| // Allocate a HeapNumber for the int and perform int-to-double |
| // conversion. |
| if (array_type == kExternalIntArray) { |
| __ push(ecx); |
| __ fild_s(Operand(esp, 0)); |
| __ pop(ecx); |
| } else { |
| ASSERT(array_type == kExternalUnsignedIntArray); |
| // Need to zero-extend the value. |
| // There's no fild variant for unsigned values, so zero-extend |
| // to a 64-bit int manually. |
| __ push(Immediate(0)); |
| __ push(ecx); |
| __ fild_d(Operand(esp, 0)); |
| __ pop(ecx); |
| __ pop(ecx); |
| } |
| // FP(0): value |
| __ AllocateHeapNumber(ecx, ebx, edi, &failed_allocation); |
| // Set the value. |
| __ mov(eax, ecx); |
| __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| __ ret(0); |
| } else if (array_type == kExternalFloatArray) { |
| // For the floating-point array type, we need to always allocate a |
| // HeapNumber. |
| __ AllocateHeapNumber(ecx, ebx, edi, &failed_allocation); |
| // Set the value. |
| __ mov(eax, ecx); |
| __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| __ ret(0); |
| } else { |
| __ mov(eax, ecx); |
| __ SmiTag(eax); |
| __ ret(0); |
| } |
| |
| // If we fail allocation of the HeapNumber, we still have a value on |
| // top of the FPU stack. Remove it. |
| __ bind(&failed_allocation); |
| __ ffree(); |
| __ fincstp(); |
| // Fall through to slow case. |
| |
| // Slow case: Load key and receiver from stack and jump to runtime. |
| __ bind(&slow); |
| __ IncrementCounter(&Counters::keyed_load_external_array_slow, 1); |
| GenerateRuntimeGetProperty(masm); |
| } |
| |
| |
| void KeyedLoadIC::GenerateIndexedInterceptor(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : key |
| // -- edx : receiver |
| // -- esp[0] : return address |
| // ----------------------------------- |
| Label slow; |
| |
| // Check that the receiver isn't a smi. |
| __ test(edx, Immediate(kSmiTagMask)); |
| __ j(zero, &slow, not_taken); |
| |
| // Check that the key is a smi. |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(not_zero, &slow, not_taken); |
| |
| // Get the map of the receiver. |
| __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset)); |
| |
| // Check that it has indexed interceptor and access checks |
| // are not enabled for this object. |
| __ movzx_b(ecx, FieldOperand(ecx, Map::kBitFieldOffset)); |
| __ and_(Operand(ecx), Immediate(kSlowCaseBitFieldMask)); |
| __ cmp(Operand(ecx), Immediate(1 << Map::kHasIndexedInterceptor)); |
| __ j(not_zero, &slow, not_taken); |
| |
| // Everything is fine, call runtime. |
| __ pop(ecx); |
| __ push(edx); // receiver |
| __ push(eax); // key |
| __ push(ecx); // return address |
| |
| // Perform tail call to the entry. |
| ExternalReference ref = ExternalReference( |
| IC_Utility(kKeyedLoadPropertyWithInterceptor)); |
| __ TailCallExternalReference(ref, 2, 1); |
| |
| __ bind(&slow); |
| GenerateMiss(masm); |
| } |
| |
| |
| void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : value |
| // -- ecx : key |
| // -- edx : receiver |
| // -- esp[0] : return address |
| // ----------------------------------- |
| Label slow, fast, array, extra, check_pixel_array; |
| |
| // Check that the object isn't a smi. |
| __ test(edx, Immediate(kSmiTagMask)); |
| __ j(zero, &slow, not_taken); |
| // Get the map from the receiver. |
| __ mov(edi, FieldOperand(edx, HeapObject::kMapOffset)); |
| // Check that the receiver does not require access checks. We need |
| // to do this because this generic stub does not perform map checks. |
| __ movzx_b(ebx, FieldOperand(edi, Map::kBitFieldOffset)); |
| __ test(ebx, Immediate(1 << Map::kIsAccessCheckNeeded)); |
| __ j(not_zero, &slow, not_taken); |
| // Check that the key is a smi. |
| __ test(ecx, Immediate(kSmiTagMask)); |
| __ j(not_zero, &slow, not_taken); |
| __ CmpInstanceType(edi, JS_ARRAY_TYPE); |
| __ j(equal, &array); |
| // Check that the object is some kind of JS object. |
| __ CmpInstanceType(edi, FIRST_JS_OBJECT_TYPE); |
| __ j(below, &slow, not_taken); |
| |
| // Object case: Check key against length in the elements array. |
| // eax: value |
| // edx: JSObject |
| // ecx: key (a smi) |
| __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset)); |
| // Check that the object is in fast mode (not dictionary). |
| __ CheckMap(edi, Factory::fixed_array_map(), &check_pixel_array, true); |
| __ mov(ebx, Operand(ecx)); |
| __ SmiUntag(ebx); |
| __ cmp(ebx, FieldOperand(edi, Array::kLengthOffset)); |
| __ j(below, &fast, taken); |
| |
| // Slow case: call runtime. |
| __ bind(&slow); |
| GenerateRuntimeSetProperty(masm); |
| |
| // Check whether the elements is a pixel array. |
| __ bind(&check_pixel_array); |
| // eax: value |
| // ecx: key |
| // edx: receiver |
| // edi: elements array |
| __ CheckMap(edi, Factory::pixel_array_map(), &slow, true); |
| // Check that the value is a smi. If a conversion is needed call into the |
| // runtime to convert and clamp. |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(not_zero, &slow); |
| __ mov(ebx, ecx); |
| __ SmiUntag(ebx); |
| __ cmp(ebx, FieldOperand(edi, PixelArray::kLengthOffset)); |
| __ j(above_equal, &slow); |
| __ mov(ecx, eax); // Save the value. Key is not longer needed. |
| __ SmiUntag(ecx); |
| { // Clamp the value to [0..255]. |
| Label done; |
| __ test(ecx, Immediate(0xFFFFFF00)); |
| __ j(zero, &done); |
| __ setcc(negative, ecx); // 1 if negative, 0 if positive. |
| __ dec_b(ecx); // 0 if negative, 255 if positive. |
| __ bind(&done); |
| } |
| __ mov(edi, FieldOperand(edi, PixelArray::kExternalPointerOffset)); |
| __ mov_b(Operand(edi, ebx, times_1, 0), ecx); |
| __ ret(0); // Return value in eax. |
| |
| // Extra capacity case: Check if there is extra capacity to |
| // perform the store and update the length. Used for adding one |
| // element to the array by writing to array[array.length]. |
| __ bind(&extra); |
| // eax: value |
| // edx: receiver, a JSArray |
| // ecx: key, a smi. |
| // edi: receiver->elements, a FixedArray |
| // flags: compare (ecx, edx.length()) |
| __ j(not_equal, &slow, not_taken); // do not leave holes in the array |
| __ mov(ebx, ecx); |
| __ SmiUntag(ebx); // untag |
| __ cmp(ebx, FieldOperand(edi, Array::kLengthOffset)); |
| __ j(above_equal, &slow, not_taken); |
| // Add 1 to receiver->length, and go to fast array write. |
| __ add(FieldOperand(edx, JSArray::kLengthOffset), |
| Immediate(1 << kSmiTagSize)); |
| __ jmp(&fast); |
| |
| // Array case: Get the length and the elements array from the JS |
| // array. Check that the array is in fast mode; if it is the |
| // length is always a smi. |
| __ bind(&array); |
| // eax: value |
| // edx: receiver, a JSArray |
| // ecx: key, a smi. |
| __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset)); |
| __ CheckMap(edi, Factory::fixed_array_map(), &check_pixel_array, true); |
| |
| // Check the key against the length in the array, compute the |
| // address to store into and fall through to fast case. |
| __ cmp(ecx, FieldOperand(edx, JSArray::kLengthOffset)); // Compare smis. |
| __ j(above_equal, &extra, not_taken); |
| |
| // Fast case: Do the store. |
| __ bind(&fast); |
| // eax: value |
| // ecx: key (a smi) |
| // edx: receiver |
| // edi: FixedArray receiver->elements |
| __ mov(FieldOperand(edi, ecx, times_2, FixedArray::kHeaderSize), eax); |
| // Update write barrier for the elements array address. |
| __ mov(edx, Operand(eax)); |
| __ RecordWrite(edi, 0, edx, ecx); |
| __ ret(0); |
| } |
| |
| |
| void KeyedStoreIC::GenerateExternalArray(MacroAssembler* masm, |
| ExternalArrayType array_type) { |
| // ----------- S t a t e ------------- |
| // -- eax : value |
| // -- ecx : key |
| // -- edx : receiver |
| // -- esp[0] : return address |
| // ----------------------------------- |
| Label slow, check_heap_number; |
| |
| // Check that the object isn't a smi. |
| __ test(edx, Immediate(kSmiTagMask)); |
| __ j(zero, &slow); |
| // Get the map from the receiver. |
| __ mov(edi, FieldOperand(edx, HeapObject::kMapOffset)); |
| // Check that the receiver does not require access checks. We need |
| // to do this because this generic stub does not perform map checks. |
| __ movzx_b(ebx, FieldOperand(edi, Map::kBitFieldOffset)); |
| __ test(ebx, Immediate(1 << Map::kIsAccessCheckNeeded)); |
| __ j(not_zero, &slow); |
| // Check that the key is a smi. |
| __ test(ecx, Immediate(kSmiTagMask)); |
| __ j(not_zero, &slow); |
| // Get the instance type from the map of the receiver. |
| __ CmpInstanceType(edi, JS_OBJECT_TYPE); |
| __ j(not_equal, &slow); |
| |
| // Check that the elements array is the appropriate type of |
| // ExternalArray. |
| // eax: value |
| // edx: receiver, a JSObject |
| // ecx: key, a smi |
| __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset)); |
| __ CheckMap(edi, Handle<Map>(Heap::MapForExternalArrayType(array_type)), |
| &slow, true); |
| |
| // Check that the index is in range. |
| __ mov(ebx, ecx); |
| __ SmiUntag(ebx); |
| __ cmp(ebx, FieldOperand(edi, ExternalArray::kLengthOffset)); |
| // Unsigned comparison catches both negative and too-large values. |
| __ j(above_equal, &slow); |
| |
| // Handle both smis and HeapNumbers in the fast path. Go to the |
| // runtime for all other kinds of values. |
| // eax: value |
| // edx: receiver |
| // ecx: key |
| // edi: elements array |
| // ebx: untagged index |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(not_equal, &check_heap_number); |
| // smi case |
| __ mov(ecx, eax); // Preserve the value in eax. Key is no longer needed. |
| __ SmiUntag(ecx); |
| __ mov(edi, FieldOperand(edi, ExternalArray::kExternalPointerOffset)); |
| // ecx: base pointer of external storage |
| switch (array_type) { |
| case kExternalByteArray: |
| case kExternalUnsignedByteArray: |
| __ mov_b(Operand(edi, ebx, times_1, 0), ecx); |
| break; |
| case kExternalShortArray: |
| case kExternalUnsignedShortArray: |
| __ mov_w(Operand(edi, ebx, times_2, 0), ecx); |
| break; |
| case kExternalIntArray: |
| case kExternalUnsignedIntArray: |
| __ mov(Operand(edi, ebx, times_4, 0), ecx); |
| break; |
| case kExternalFloatArray: |
| // Need to perform int-to-float conversion. |
| __ push(ecx); |
| __ fild_s(Operand(esp, 0)); |
| __ pop(ecx); |
| __ fstp_s(Operand(edi, ebx, times_4, 0)); |
| break; |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| __ ret(0); // Return the original value. |
| |
| __ bind(&check_heap_number); |
| // eax: value |
| // edx: receiver |
| // ecx: key |
| // edi: elements array |
| // ebx: untagged index |
| __ cmp(FieldOperand(eax, HeapObject::kMapOffset), |
| Immediate(Factory::heap_number_map())); |
| __ j(not_equal, &slow); |
| |
| // The WebGL specification leaves the behavior of storing NaN and |
| // +/-Infinity into integer arrays basically undefined. For more |
| // reproducible behavior, convert these to zero. |
| __ fld_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| __ mov(edi, FieldOperand(edi, ExternalArray::kExternalPointerOffset)); |
| // ebx: untagged index |
| // edi: base pointer of external storage |
| // top of FPU stack: value |
| if (array_type == kExternalFloatArray) { |
| __ fstp_s(Operand(edi, ebx, times_4, 0)); |
| __ ret(0); |
| } else { |
| // Need to perform float-to-int conversion. |
| // Test the top of the FP stack for NaN. |
| Label is_nan; |
| __ fucomi(0); |
| __ j(parity_even, &is_nan); |
| |
| if (array_type != kExternalUnsignedIntArray) { |
| __ push(ecx); // Make room on stack |
| __ fistp_s(Operand(esp, 0)); |
| __ pop(ecx); |
| } else { |
| // fistp stores values as signed integers. |
| // To represent the entire range, we need to store as a 64-bit |
| // int and discard the high 32 bits. |
| __ sub(Operand(esp), Immediate(2 * kPointerSize)); |
| __ fistp_d(Operand(esp, 0)); |
| __ pop(ecx); |
| __ add(Operand(esp), Immediate(kPointerSize)); |
| } |
| // ecx: untagged integer value |
| switch (array_type) { |
| case kExternalByteArray: |
| case kExternalUnsignedByteArray: |
| __ mov_b(Operand(edi, ebx, times_1, 0), ecx); |
| break; |
| case kExternalShortArray: |
| case kExternalUnsignedShortArray: |
| __ mov_w(Operand(edi, ebx, times_2, 0), ecx); |
| break; |
| case kExternalIntArray: |
| case kExternalUnsignedIntArray: { |
| // We also need to explicitly check for +/-Infinity. These are |
| // converted to MIN_INT, but we need to be careful not to |
| // confuse with legal uses of MIN_INT. |
| Label not_infinity; |
| // This test would apparently detect both NaN and Infinity, |
| // but we've already checked for NaN using the FPU hardware |
| // above. |
| __ mov_w(edx, FieldOperand(eax, HeapNumber::kValueOffset + 6)); |
| __ and_(edx, 0x7FF0); |
| __ cmp(edx, 0x7FF0); |
| __ j(not_equal, ¬_infinity); |
| __ mov(ecx, 0); |
| __ bind(¬_infinity); |
| __ mov(Operand(edi, ebx, times_4, 0), ecx); |
| break; |
| } |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| __ ret(0); // Return original value. |
| |
| __ bind(&is_nan); |
| __ ffree(); |
| __ fincstp(); |
| switch (array_type) { |
| case kExternalByteArray: |
| case kExternalUnsignedByteArray: |
| __ mov_b(Operand(edi, ebx, times_1, 0), 0); |
| break; |
| case kExternalShortArray: |
| case kExternalUnsignedShortArray: |
| __ xor_(ecx, Operand(ecx)); |
| __ mov_w(Operand(edi, ebx, times_2, 0), ecx); |
| break; |
| case kExternalIntArray: |
| case kExternalUnsignedIntArray: |
| __ mov(Operand(edi, ebx, times_4, 0), Immediate(0)); |
| break; |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| __ ret(0); // Return the original value. |
| } |
| |
| // Slow case: call runtime. |
| __ bind(&slow); |
| GenerateRuntimeSetProperty(masm); |
| } |
| |
| |
| // Defined in ic.cc. |
| Object* CallIC_Miss(Arguments args); |
| |
| void CallIC::GenerateMegamorphic(MacroAssembler* masm, int argc) { |
| // ----------- S t a t e ------------- |
| // -- ecx : name |
| // -- esp[0] : return address |
| // -- esp[(argc - n) * 4] : arg[n] (zero-based) |
| // -- ... |
| // -- esp[(argc + 1) * 4] : receiver |
| // ----------------------------------- |
| Label number, non_number, non_string, boolean, probe, miss; |
| |
| // Get the receiver of the function from the stack; 1 ~ return address. |
| __ mov(edx, Operand(esp, (argc + 1) * kPointerSize)); |
| |
| // Probe the stub cache. |
| Code::Flags flags = |
| Code::ComputeFlags(Code::CALL_IC, NOT_IN_LOOP, MONOMORPHIC, NORMAL, argc); |
| StubCache::GenerateProbe(masm, flags, edx, ecx, ebx, eax); |
| |
| // If the stub cache probing failed, the receiver might be a value. |
| // For value objects, we use the map of the prototype objects for |
| // the corresponding JSValue for the cache and that is what we need |
| // to probe. |
| // |
| // Check for number. |
| __ test(edx, Immediate(kSmiTagMask)); |
| __ j(zero, &number, not_taken); |
| __ CmpObjectType(edx, HEAP_NUMBER_TYPE, ebx); |
| __ j(not_equal, &non_number, taken); |
| __ bind(&number); |
| StubCompiler::GenerateLoadGlobalFunctionPrototype( |
| masm, Context::NUMBER_FUNCTION_INDEX, edx); |
| __ jmp(&probe); |
| |
| // Check for string. |
| __ bind(&non_number); |
| __ cmp(ebx, FIRST_NONSTRING_TYPE); |
| __ j(above_equal, &non_string, taken); |
| StubCompiler::GenerateLoadGlobalFunctionPrototype( |
| masm, Context::STRING_FUNCTION_INDEX, edx); |
| __ jmp(&probe); |
| |
| // Check for boolean. |
| __ bind(&non_string); |
| __ cmp(edx, Factory::true_value()); |
| __ j(equal, &boolean, not_taken); |
| __ cmp(edx, Factory::false_value()); |
| __ j(not_equal, &miss, taken); |
| __ bind(&boolean); |
| StubCompiler::GenerateLoadGlobalFunctionPrototype( |
| masm, Context::BOOLEAN_FUNCTION_INDEX, edx); |
| |
| // Probe the stub cache for the value object. |
| __ bind(&probe); |
| StubCache::GenerateProbe(masm, flags, edx, ecx, ebx, no_reg); |
| |
| // Cache miss: Jump to runtime. |
| __ bind(&miss); |
| GenerateMiss(masm, argc); |
| } |
| |
| |
| static void GenerateNormalHelper(MacroAssembler* masm, |
| int argc, |
| bool is_global_object, |
| Label* miss) { |
| // ----------- S t a t e ------------- |
| // -- ecx : name |
| // -- edx : receiver |
| // -- esp[0] : return address |
| // -- esp[(argc - n) * 4] : arg[n] (zero-based) |
| // -- ... |
| // -- esp[(argc + 1) * 4] : receiver |
| // ----------------------------------- |
| |
| // Search dictionary - put result in register edi. |
| __ mov(edi, edx); |
| GenerateDictionaryLoad(masm, miss, edx, ecx, eax, edi, ebx, CHECK_DICTIONARY); |
| |
| // Check that the result is not a smi. |
| __ test(edi, Immediate(kSmiTagMask)); |
| __ j(zero, miss, not_taken); |
| |
| // Check that the value is a JavaScript function, fetching its map into eax. |
| __ CmpObjectType(edi, JS_FUNCTION_TYPE, eax); |
| __ j(not_equal, miss, not_taken); |
| |
| // Patch the receiver on stack with the global proxy if necessary. |
| if (is_global_object) { |
| __ mov(edx, FieldOperand(edx, GlobalObject::kGlobalReceiverOffset)); |
| __ mov(Operand(esp, (argc + 1) * kPointerSize), edx); |
| } |
| |
| // Invoke the function. |
| ParameterCount actual(argc); |
| __ InvokeFunction(edi, actual, JUMP_FUNCTION); |
| } |
| |
| |
| void CallIC::GenerateNormal(MacroAssembler* masm, int argc) { |
| // ----------- S t a t e ------------- |
| // -- ecx : name |
| // -- esp[0] : return address |
| // -- esp[(argc - n) * 4] : arg[n] (zero-based) |
| // -- ... |
| // -- esp[(argc + 1) * 4] : receiver |
| // ----------------------------------- |
| Label miss, global_object, non_global_object; |
| |
| // Get the receiver of the function from the stack; 1 ~ return address. |
| __ mov(edx, Operand(esp, (argc + 1) * kPointerSize)); |
| |
| // Check that the receiver isn't a smi. |
| __ test(edx, Immediate(kSmiTagMask)); |
| __ j(zero, &miss, not_taken); |
| |
| // Check that the receiver is a valid JS object. |
| __ mov(ebx, FieldOperand(edx, HeapObject::kMapOffset)); |
| __ movzx_b(eax, FieldOperand(ebx, Map::kInstanceTypeOffset)); |
| __ cmp(eax, FIRST_JS_OBJECT_TYPE); |
| __ j(below, &miss, not_taken); |
| |
| // If this assert fails, we have to check upper bound too. |
| ASSERT(LAST_TYPE == JS_FUNCTION_TYPE); |
| |
| // Check for access to global object. |
| __ cmp(eax, JS_GLOBAL_OBJECT_TYPE); |
| __ j(equal, &global_object); |
| __ cmp(eax, JS_BUILTINS_OBJECT_TYPE); |
| __ j(not_equal, &non_global_object); |
| |
| // Accessing global object: Load and invoke. |
| __ bind(&global_object); |
| // Check that the global object does not require access checks. |
| __ movzx_b(ebx, FieldOperand(ebx, Map::kBitFieldOffset)); |
| __ test(ebx, Immediate(1 << Map::kIsAccessCheckNeeded)); |
| __ j(not_equal, &miss, not_taken); |
| GenerateNormalHelper(masm, argc, true, &miss); |
| |
| // Accessing non-global object: Check for access to global proxy. |
| Label global_proxy, invoke; |
| __ bind(&non_global_object); |
| __ cmp(eax, JS_GLOBAL_PROXY_TYPE); |
| __ j(equal, &global_proxy, not_taken); |
| // Check that the non-global, non-global-proxy object does not |
| // require access checks. |
| __ movzx_b(ebx, FieldOperand(ebx, Map::kBitFieldOffset)); |
| __ test(ebx, Immediate(1 << Map::kIsAccessCheckNeeded)); |
| __ j(not_equal, &miss, not_taken); |
| __ bind(&invoke); |
| GenerateNormalHelper(masm, argc, false, &miss); |
| |
| // Global object proxy access: Check access rights. |
| __ bind(&global_proxy); |
| __ CheckAccessGlobalProxy(edx, eax, &miss); |
| __ jmp(&invoke); |
| |
| // Cache miss: Jump to runtime. |
| __ bind(&miss); |
| GenerateMiss(masm, argc); |
| } |
| |
| |
| void CallIC::GenerateMiss(MacroAssembler* masm, int argc) { |
| // ----------- S t a t e ------------- |
| // -- ecx : name |
| // -- esp[0] : return address |
| // -- esp[(argc - n) * 4] : arg[n] (zero-based) |
| // -- ... |
| // -- esp[(argc + 1) * 4] : receiver |
| // ----------------------------------- |
| |
| // Get the receiver of the function from the stack; 1 ~ return address. |
| __ mov(edx, Operand(esp, (argc + 1) * kPointerSize)); |
| |
| // Enter an internal frame. |
| __ EnterInternalFrame(); |
| |
| // Push the receiver and the name of the function. |
| __ push(edx); |
| __ push(ecx); |
| |
| // Call the entry. |
| CEntryStub stub(1); |
| __ mov(eax, Immediate(2)); |
| __ mov(ebx, Immediate(ExternalReference(IC_Utility(kCallIC_Miss)))); |
| __ CallStub(&stub); |
| |
| // Move result to edi and exit the internal frame. |
| __ mov(edi, eax); |
| __ LeaveInternalFrame(); |
| |
| // Check if the receiver is a global object of some sort. |
| Label invoke, global; |
| __ mov(edx, Operand(esp, (argc + 1) * kPointerSize)); // receiver |
| __ test(edx, Immediate(kSmiTagMask)); |
| __ j(zero, &invoke, not_taken); |
| __ mov(ebx, FieldOperand(edx, HeapObject::kMapOffset)); |
| __ movzx_b(ebx, FieldOperand(ebx, Map::kInstanceTypeOffset)); |
| __ cmp(ebx, JS_GLOBAL_OBJECT_TYPE); |
| __ j(equal, &global); |
| __ cmp(ebx, JS_BUILTINS_OBJECT_TYPE); |
| __ j(not_equal, &invoke); |
| |
| // Patch the receiver on the stack. |
| __ bind(&global); |
| __ mov(edx, FieldOperand(edx, GlobalObject::kGlobalReceiverOffset)); |
| __ mov(Operand(esp, (argc + 1) * kPointerSize), edx); |
| |
| // Invoke the function. |
| ParameterCount actual(argc); |
| __ bind(&invoke); |
| __ InvokeFunction(edi, actual, JUMP_FUNCTION); |
| } |
| |
| |
| // Defined in ic.cc. |
| Object* LoadIC_Miss(Arguments args); |
| |
| void LoadIC::GenerateMegamorphic(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : receiver |
| // -- ecx : name |
| // -- esp[0] : return address |
| // ----------------------------------- |
| |
| // Probe the stub cache. |
| Code::Flags flags = Code::ComputeFlags(Code::LOAD_IC, |
| NOT_IN_LOOP, |
| MONOMORPHIC); |
| StubCache::GenerateProbe(masm, flags, eax, ecx, ebx, edx); |
| |
| // Cache miss: Jump to runtime. |
| GenerateMiss(masm); |
| } |
| |
| |
| void LoadIC::GenerateNormal(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : receiver |
| // -- ecx : name |
| // -- esp[0] : return address |
| // ----------------------------------- |
| Label miss, probe, global; |
| |
| // Check that the receiver isn't a smi. |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(zero, &miss, not_taken); |
| |
| // Check that the receiver is a valid JS object. |
| __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
| __ movzx_b(edx, FieldOperand(ebx, Map::kInstanceTypeOffset)); |
| __ cmp(edx, FIRST_JS_OBJECT_TYPE); |
| __ j(less, &miss, not_taken); |
| |
| // If this assert fails, we have to check upper bound too. |
| ASSERT(LAST_TYPE == JS_FUNCTION_TYPE); |
| |
| // Check for access to global object (unlikely). |
| __ cmp(edx, JS_GLOBAL_PROXY_TYPE); |
| __ j(equal, &global, not_taken); |
| |
| // Check for non-global object that requires access check. |
| __ movzx_b(ebx, FieldOperand(ebx, Map::kBitFieldOffset)); |
| __ test(ebx, Immediate(1 << Map::kIsAccessCheckNeeded)); |
| __ j(not_zero, &miss, not_taken); |
| |
| // Search the dictionary placing the result in eax. |
| __ bind(&probe); |
| GenerateDictionaryLoad(masm, |
| &miss, |
| eax, |
| ecx, |
| edx, |
| edi, |
| ebx, |
| CHECK_DICTIONARY); |
| __ mov(eax, edi); |
| __ ret(0); |
| |
| // Global object access: Check access rights. |
| __ bind(&global); |
| __ CheckAccessGlobalProxy(eax, edx, &miss); |
| __ jmp(&probe); |
| |
| // Cache miss: Restore receiver from stack and jump to runtime. |
| __ bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| |
| void LoadIC::GenerateMiss(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : receiver |
| // -- ecx : name |
| // -- esp[0] : return address |
| // ----------------------------------- |
| |
| __ pop(ebx); |
| __ push(eax); // receiver |
| __ push(ecx); // name |
| __ push(ebx); // return address |
| |
| // Perform tail call to the entry. |
| ExternalReference ref = ExternalReference(IC_Utility(kLoadIC_Miss)); |
| __ TailCallExternalReference(ref, 2, 1); |
| } |
| |
| |
| // One byte opcode for test eax,0xXXXXXXXX. |
| static const byte kTestEaxByte = 0xA9; |
| |
| |
| void LoadIC::ClearInlinedVersion(Address address) { |
| // Reset the map check of the inlined inobject property load (if |
| // present) to guarantee failure by holding an invalid map (the null |
| // value). The offset can be patched to anything. |
| PatchInlinedLoad(address, Heap::null_value(), kMaxInt); |
| } |
| |
| |
| void KeyedLoadIC::ClearInlinedVersion(Address address) { |
| // Insert null as the map to check for to make sure the map check fails |
| // sending control flow to the IC instead of the inlined version. |
| PatchInlinedLoad(address, Heap::null_value()); |
| } |
| |
| |
| void KeyedStoreIC::ClearInlinedVersion(Address address) { |
| // Insert null as the elements map to check for. This will make |
| // sure that the elements fast-case map check fails so that control |
| // flows to the IC instead of the inlined version. |
| PatchInlinedStore(address, Heap::null_value()); |
| } |
| |
| |
| void KeyedStoreIC::RestoreInlinedVersion(Address address) { |
| // Restore the fast-case elements map check so that the inlined |
| // version can be used again. |
| PatchInlinedStore(address, Heap::fixed_array_map()); |
| } |
| |
| |
| bool LoadIC::PatchInlinedLoad(Address address, Object* map, int offset) { |
| // The address of the instruction following the call. |
| Address test_instruction_address = |
| address + Assembler::kCallTargetAddressOffset; |
| // If the instruction following the call is not a test eax, nothing |
| // was inlined. |
| if (*test_instruction_address != kTestEaxByte) return false; |
| |
| Address delta_address = test_instruction_address + 1; |
| // The delta to the start of the map check instruction. |
| int delta = *reinterpret_cast<int*>(delta_address); |
| |
| // The map address is the last 4 bytes of the 7-byte |
| // operand-immediate compare instruction, so we add 3 to get the |
| // offset to the last 4 bytes. |
| Address map_address = test_instruction_address + delta + 3; |
| *(reinterpret_cast<Object**>(map_address)) = map; |
| |
| // The offset is in the last 4 bytes of a six byte |
| // memory-to-register move instruction, so we add 2 to get the |
| // offset to the last 4 bytes. |
| Address offset_address = |
| test_instruction_address + delta + kOffsetToLoadInstruction + 2; |
| *reinterpret_cast<int*>(offset_address) = offset - kHeapObjectTag; |
| return true; |
| } |
| |
| |
| static bool PatchInlinedMapCheck(Address address, Object* map) { |
| Address test_instruction_address = |
| address + Assembler::kCallTargetAddressOffset; |
| // The keyed load has a fast inlined case if the IC call instruction |
| // is immediately followed by a test instruction. |
| if (*test_instruction_address != kTestEaxByte) return false; |
| |
| // Fetch the offset from the test instruction to the map cmp |
| // instruction. This offset is stored in the last 4 bytes of the 5 |
| // byte test instruction. |
| Address delta_address = test_instruction_address + 1; |
| int delta = *reinterpret_cast<int*>(delta_address); |
| // Compute the map address. The map address is in the last 4 bytes |
| // of the 7-byte operand-immediate compare instruction, so we add 3 |
| // to the offset to get the map address. |
| Address map_address = test_instruction_address + delta + 3; |
| // Patch the map check. |
| *(reinterpret_cast<Object**>(map_address)) = map; |
| return true; |
| } |
| |
| |
| bool KeyedLoadIC::PatchInlinedLoad(Address address, Object* map) { |
| return PatchInlinedMapCheck(address, map); |
| } |
| |
| |
| bool KeyedStoreIC::PatchInlinedStore(Address address, Object* map) { |
| return PatchInlinedMapCheck(address, map); |
| } |
| |
| |
| // Defined in ic.cc. |
| Object* KeyedLoadIC_Miss(Arguments args); |
| |
| |
| void KeyedLoadIC::GenerateMiss(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : key |
| // -- edx : receiver |
| // -- esp[0] : return address |
| // ----------------------------------- |
| |
| __ pop(ebx); |
| __ push(edx); // receiver |
| __ push(eax); // name |
| __ push(ebx); // return address |
| |
| // Perform tail call to the entry. |
| ExternalReference ref = ExternalReference(IC_Utility(kKeyedLoadIC_Miss)); |
| __ TailCallExternalReference(ref, 2, 1); |
| } |
| |
| |
| void KeyedLoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : key |
| // -- edx : receiver |
| // -- esp[0] : return address |
| // ----------------------------------- |
| |
| __ pop(ebx); |
| __ push(edx); // receiver |
| __ push(eax); // name |
| __ push(ebx); // return address |
| |
| // Perform tail call to the entry. |
| __ TailCallRuntime(Runtime::kKeyedGetProperty, 2, 1); |
| } |
| |
| |
| void StoreIC::GenerateMegamorphic(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : value |
| // -- ecx : name |
| // -- edx : receiver |
| // -- esp[0] : return address |
| // ----------------------------------- |
| |
| Code::Flags flags = Code::ComputeFlags(Code::STORE_IC, |
| NOT_IN_LOOP, |
| MONOMORPHIC); |
| StubCache::GenerateProbe(masm, flags, edx, ecx, ebx, no_reg); |
| |
| // Cache miss: Jump to runtime. |
| GenerateMiss(masm); |
| } |
| |
| |
| void StoreIC::GenerateMiss(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : value |
| // -- ecx : name |
| // -- edx : receiver |
| // -- esp[0] : return address |
| // ----------------------------------- |
| |
| __ pop(ebx); |
| __ push(edx); |
| __ push(ecx); |
| __ push(eax); |
| __ push(ebx); |
| |
| // Perform tail call to the entry. |
| ExternalReference ref = ExternalReference(IC_Utility(kStoreIC_Miss)); |
| __ TailCallExternalReference(ref, 3, 1); |
| } |
| |
| |
| void StoreIC::GenerateArrayLength(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : value |
| // -- ecx : name |
| // -- edx : receiver |
| // -- esp[0] : return address |
| // ----------------------------------- |
| // |
| // This accepts as a receiver anything JSObject::SetElementsLength accepts |
| // (currently anything except for external and pixel arrays which means |
| // anything with elements of FixedArray type.), but currently is restricted |
| // to JSArray. |
| // Value must be a number, but only smis are accepted as the most common case. |
| |
| Label miss; |
| |
| Register receiver = edx; |
| Register value = eax; |
| Register scratch = ebx; |
| |
| // Check that the receiver isn't a smi. |
| __ test(receiver, Immediate(kSmiTagMask)); |
| __ j(zero, &miss, not_taken); |
| |
| // Check that the object is a JS array. |
| __ CmpObjectType(receiver, JS_ARRAY_TYPE, scratch); |
| __ j(not_equal, &miss, not_taken); |
| |
| // Check that elements are FixedArray. |
| __ mov(scratch, FieldOperand(receiver, JSArray::kElementsOffset)); |
| __ CmpObjectType(scratch, FIXED_ARRAY_TYPE, scratch); |
| __ j(not_equal, &miss, not_taken); |
| |
| // Check that value is a smi. |
| __ test(value, Immediate(kSmiTagMask)); |
| __ j(not_zero, &miss, not_taken); |
| |
| // Prepare tail call to StoreIC_ArrayLength. |
| __ pop(scratch); |
| __ push(receiver); |
| __ push(value); |
| __ push(scratch); // return address |
| |
| ExternalReference ref = ExternalReference(IC_Utility(kStoreIC_ArrayLength)); |
| __ TailCallExternalReference(ref, 2, 1); |
| |
| __ bind(&miss); |
| |
| GenerateMiss(masm); |
| } |
| |
| |
| // Defined in ic.cc. |
| Object* KeyedStoreIC_Miss(Arguments args); |
| |
| void KeyedStoreIC::GenerateRuntimeSetProperty(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : value |
| // -- ecx : key |
| // -- edx : receiver |
| // -- esp[0] : return address |
| // ----------------------------------- |
| |
| __ pop(ebx); |
| __ push(edx); |
| __ push(ecx); |
| __ push(eax); |
| __ push(ebx); |
| |
| // Do tail-call to runtime routine. |
| __ TailCallRuntime(Runtime::kSetProperty, 3, 1); |
| } |
| |
| |
| void KeyedStoreIC::GenerateMiss(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : value |
| // -- ecx : key |
| // -- edx : receiver |
| // -- esp[0] : return address |
| // ----------------------------------- |
| |
| __ pop(ebx); |
| __ push(edx); |
| __ push(ecx); |
| __ push(eax); |
| __ push(ebx); |
| |
| // Do tail-call to runtime routine. |
| ExternalReference ref = ExternalReference(IC_Utility(kKeyedStoreIC_Miss)); |
| __ TailCallExternalReference(ref, 3, 1); |
| } |
| |
| #undef __ |
| |
| |
| } } // namespace v8::internal |