| // Copyright 2010 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" |
| |
| #if defined(V8_TARGET_ARCH_IA32) |
| |
| #include "codegen-inl.h" |
| #include "ic-inl.h" |
| #include "runtime.h" |
| #include "stub-cache.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // ---------------------------------------------------------------------------- |
| // Static IC stub generators. |
| // |
| |
| #define __ ACCESS_MASM(masm) |
| |
| |
| static void GenerateGlobalInstanceTypeCheck(MacroAssembler* masm, |
| Register type, |
| Label* global_object) { |
| // Register usage: |
| // type: holds the receiver instance type on entry. |
| __ cmp(type, JS_GLOBAL_OBJECT_TYPE); |
| __ j(equal, global_object, not_taken); |
| __ cmp(type, JS_BUILTINS_OBJECT_TYPE); |
| __ j(equal, global_object, not_taken); |
| __ cmp(type, JS_GLOBAL_PROXY_TYPE); |
| __ j(equal, global_object, not_taken); |
| } |
| |
| |
| // Generated code falls through if the receiver is a regular non-global |
| // JS object with slow properties and no interceptors. |
| static void GenerateStringDictionaryReceiverCheck(MacroAssembler* masm, |
| Register receiver, |
| Register r0, |
| Register r1, |
| Label* miss) { |
| // Register usage: |
| // receiver: holds the receiver on entry and is unchanged. |
| // r0: used to hold receiver instance type. |
| // Holds the property dictionary on fall through. |
| // r1: used to hold receivers map. |
| |
| // Check that the receiver isn't a smi. |
| __ test(receiver, Immediate(kSmiTagMask)); |
| __ j(zero, miss, not_taken); |
| |
| // Check that the receiver is a valid JS object. |
| __ mov(r1, FieldOperand(receiver, HeapObject::kMapOffset)); |
| __ movzx_b(r0, FieldOperand(r1, Map::kInstanceTypeOffset)); |
| __ cmp(r0, 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); |
| |
| GenerateGlobalInstanceTypeCheck(masm, r0, miss); |
| |
| // Check for non-global object that requires access check. |
| __ test_b(FieldOperand(r1, Map::kBitFieldOffset), |
| (1 << Map::kIsAccessCheckNeeded) | |
| (1 << Map::kHasNamedInterceptor)); |
| __ j(not_zero, miss, not_taken); |
| |
| __ mov(r0, FieldOperand(receiver, JSObject::kPropertiesOffset)); |
| __ CheckMap(r0, Factory::hash_table_map(), miss, true); |
| } |
| |
| |
| // Probe the string dictionary in the |elements| register. Jump to the |
| // |done| label if a property with the given name is found leaving the |
| // index into the dictionary in |r0|. Jump to the |miss| label |
| // otherwise. |
| static void GenerateStringDictionaryProbes(MacroAssembler* masm, |
| Label* miss, |
| Label* done, |
| Register elements, |
| Register name, |
| Register r0, |
| Register r1) { |
| // Compute the capacity mask. |
| const int kCapacityOffset = |
| StringDictionary::kHeaderSize + |
| StringDictionary::kCapacityIndex * kPointerSize; |
| __ mov(r1, FieldOperand(elements, kCapacityOffset)); |
| __ shr(r1, kSmiTagSize); // convert smi to int |
| __ dec(r1); |
| |
| // 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(r0, FieldOperand(name, String::kHashFieldOffset)); |
| __ shr(r0, String::kHashShift); |
| if (i > 0) { |
| __ add(Operand(r0), Immediate(StringDictionary::GetProbeOffset(i))); |
| } |
| __ and_(r0, Operand(r1)); |
| |
| // Scale the index by multiplying by the entry size. |
| ASSERT(StringDictionary::kEntrySize == 3); |
| __ lea(r0, Operand(r0, r0, times_2, 0)); // r0 = r0 * 3 |
| |
| // Check if the key is identical to the name. |
| __ cmp(name, Operand(elements, r0, times_4, |
| kElementsStartOffset - kHeapObjectTag)); |
| if (i != kProbes - 1) { |
| __ j(equal, done, taken); |
| } else { |
| __ j(not_equal, miss, not_taken); |
| } |
| } |
| } |
| |
| |
| |
| // Helper function used to load a property from a dictionary backing |
| // storage. This function may fail to load a property even though it is |
| // in the dictionary, so code at miss_label must always call a backup |
| // property load that is complete. This function is safe to call if |
| // name is not a symbol, and will jump to the miss_label in that |
| // case. The generated code assumes that the receiver has slow |
| // properties, is not a global object and does not have interceptors. |
| static void GenerateDictionaryLoad(MacroAssembler* masm, |
| Label* miss_label, |
| Register elements, |
| Register name, |
| Register r0, |
| Register r1, |
| Register result) { |
| // Register use: |
| // |
| // elements - holds the property dictionary on entry and is unchanged. |
| // |
| // name - holds the name of the property on entry and is unchanged. |
| // |
| // Scratch registers: |
| // |
| // r0 - used for the index into the property dictionary |
| // |
| // r1 - used to hold the capacity of the property dictionary. |
| // |
| // result - holds the result on exit. |
| |
| Label done; |
| |
| // Probe the dictionary. |
| GenerateStringDictionaryProbes(masm, |
| miss_label, |
| &done, |
| elements, |
| name, |
| r0, |
| r1); |
| |
| // If probing finds an entry in the dictionary, r0 contains the |
| // index into the dictionary. Check that the value is a normal |
| // property. |
| __ bind(&done); |
| const int kElementsStartOffset = |
| StringDictionary::kHeaderSize + |
| StringDictionary::kElementsStartIndex * kPointerSize; |
| const int kDetailsOffset = kElementsStartOffset + 2 * kPointerSize; |
| __ test(Operand(elements, r0, 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(result, Operand(elements, r0, times_4, kValueOffset - kHeapObjectTag)); |
| } |
| |
| |
| // Helper function used to store a property to a dictionary backing |
| // storage. This function may fail to store a property eventhough it |
| // is in the dictionary, so code at miss_label must always call a |
| // backup property store that is complete. This function is safe to |
| // call if name is not a symbol, and will jump to the miss_label in |
| // that case. The generated code assumes that the receiver has slow |
| // properties, is not a global object and does not have interceptors. |
| static void GenerateDictionaryStore(MacroAssembler* masm, |
| Label* miss_label, |
| Register elements, |
| Register name, |
| Register value, |
| Register r0, |
| Register r1) { |
| // Register use: |
| // |
| // elements - holds the property dictionary on entry and is clobbered. |
| // |
| // name - holds the name of the property on entry and is unchanged. |
| // |
| // value - holds the value to store and is unchanged. |
| // |
| // r0 - used for index into the property dictionary and is clobbered. |
| // |
| // r1 - used to hold the capacity of the property dictionary and is clobbered. |
| Label done; |
| |
| |
| // Probe the dictionary. |
| GenerateStringDictionaryProbes(masm, |
| miss_label, |
| &done, |
| elements, |
| name, |
| r0, |
| r1); |
| |
| // If probing finds an entry in the dictionary, r0 contains the |
| // index into the dictionary. Check that the value is a normal |
| // property that is not read only. |
| __ bind(&done); |
| const int kElementsStartOffset = |
| StringDictionary::kHeaderSize + |
| StringDictionary::kElementsStartIndex * kPointerSize; |
| const int kDetailsOffset = kElementsStartOffset + 2 * kPointerSize; |
| const int kTypeAndReadOnlyMask |
| = (PropertyDetails::TypeField::mask() | |
| PropertyDetails::AttributesField::encode(READ_ONLY)) << kSmiTagSize; |
| __ test(Operand(elements, r0, times_4, kDetailsOffset - kHeapObjectTag), |
| Immediate(kTypeAndReadOnlyMask)); |
| __ j(not_zero, miss_label, not_taken); |
| |
| // Store the value at the masked, scaled index. |
| const int kValueOffset = kElementsStartOffset + kPointerSize; |
| __ lea(r0, Operand(elements, r0, times_4, kValueOffset - kHeapObjectTag)); |
| __ mov(Operand(r0, 0), value); |
| |
| // Update write barrier. Make sure not to clobber the value. |
| __ mov(r1, value); |
| __ RecordWrite(elements, r0, r1); |
| } |
| |
| |
| static void GenerateNumberDictionaryLoad(MacroAssembler* masm, |
| Label* miss, |
| Register elements, |
| Register key, |
| Register r0, |
| Register r1, |
| Register r2, |
| Register result) { |
| // Register use: |
| // |
| // elements - holds the slow-case elements of the receiver and is unchanged. |
| // |
| // key - holds the smi key on entry and is unchanged. |
| // |
| // 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. |
| // |
| // result - holds the result on exit if the load succeeds and we fall through. |
| |
| 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(result, 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); |
| } |
| |
| |
| // Checks the receiver for special cases (value type, slow case bits). |
| // Falls through for regular JS object. |
| static void GenerateKeyedLoadReceiverCheck(MacroAssembler* masm, |
| Register receiver, |
| Register map, |
| int interceptor_bit, |
| Label* slow) { |
| // Register use: |
| // receiver - holds the receiver and is unchanged. |
| // Scratch registers: |
| // map - used to hold the map of the receiver. |
| |
| // Check that the object isn't a smi. |
| __ test(receiver, Immediate(kSmiTagMask)); |
| __ j(zero, slow, not_taken); |
| |
| // Get the map of the receiver. |
| __ mov(map, FieldOperand(receiver, HeapObject::kMapOffset)); |
| |
| // Check bit field. |
| __ test_b(FieldOperand(map, Map::kBitFieldOffset), |
| (1 << Map::kIsAccessCheckNeeded) | (1 << interceptor_bit)); |
| __ 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 works as intended. |
| ASSERT(JS_OBJECT_TYPE > JS_VALUE_TYPE); |
| |
| __ CmpInstanceType(map, JS_OBJECT_TYPE); |
| __ j(below, slow, not_taken); |
| } |
| |
| |
| // Loads an indexed element from a fast case array. |
| // If not_fast_array is NULL, doesn't perform the elements map check. |
| static void GenerateFastArrayLoad(MacroAssembler* masm, |
| Register receiver, |
| Register key, |
| Register scratch, |
| Register result, |
| Label* not_fast_array, |
| Label* out_of_range) { |
| // Register use: |
| // receiver - holds the receiver and is unchanged. |
| // key - holds the key and is unchanged (must be a smi). |
| // Scratch registers: |
| // scratch - used to hold elements of the receiver and the loaded value. |
| // result - holds the result on exit if the load succeeds and |
| // we fall through. |
| |
| __ mov(scratch, FieldOperand(receiver, JSObject::kElementsOffset)); |
| if (not_fast_array != NULL) { |
| // Check that the object is in fast mode and writable. |
| __ CheckMap(scratch, Factory::fixed_array_map(), not_fast_array, true); |
| } else { |
| __ AssertFastElements(scratch); |
| } |
| // Check that the key (index) is within bounds. |
| __ cmp(key, FieldOperand(scratch, FixedArray::kLengthOffset)); |
| __ j(above_equal, out_of_range); |
| // Fast case: Do the load. |
| ASSERT((kPointerSize == 4) && (kSmiTagSize == 1) && (kSmiTag == 0)); |
| __ mov(scratch, FieldOperand(scratch, key, times_2, FixedArray::kHeaderSize)); |
| __ cmp(Operand(scratch), 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, out_of_range); |
| if (!result.is(scratch)) { |
| __ mov(result, scratch); |
| } |
| } |
| |
| |
| // Checks whether a key is an array index string or a symbol string. |
| // Falls through if the key is a symbol. |
| static void GenerateKeyStringCheck(MacroAssembler* masm, |
| Register key, |
| Register map, |
| Register hash, |
| Label* index_string, |
| Label* not_symbol) { |
| // Register use: |
| // key - holds the key and is unchanged. Assumed to be non-smi. |
| // Scratch registers: |
| // map - used to hold the map of the key. |
| // hash - used to hold the hash of the key. |
| __ CmpObjectType(key, FIRST_NONSTRING_TYPE, map); |
| __ j(above_equal, not_symbol); |
| |
| // Is the string an array index, with cached numeric value? |
| __ mov(hash, FieldOperand(key, String::kHashFieldOffset)); |
| __ test(hash, Immediate(String::kContainsCachedArrayIndexMask)); |
| __ j(zero, index_string, not_taken); |
| |
| // Is the string a symbol? |
| ASSERT(kSymbolTag != 0); |
| __ test_b(FieldOperand(map, Map::kInstanceTypeOffset), kIsSymbolMask); |
| __ j(zero, not_symbol, not_taken); |
| } |
| |
| |
| void KeyedLoadIC::GenerateGeneric(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : key |
| // -- edx : receiver |
| // -- esp[0] : return address |
| // ----------------------------------- |
| Label slow, check_string, index_smi, index_string, property_array_property; |
| Label check_pixel_array, probe_dictionary, check_number_dictionary; |
| |
| // Check that the key is a smi. |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(not_zero, &check_string, not_taken); |
| __ bind(&index_smi); |
| // Now the key is known to be a smi. This place is also jumped to from |
| // where a numeric string is converted to a smi. |
| |
| GenerateKeyedLoadReceiverCheck( |
| masm, edx, ecx, Map::kHasIndexedInterceptor, &slow); |
| |
| // Check the "has fast elements" bit in the receiver's map which is |
| // now in ecx. |
| __ test_b(FieldOperand(ecx, Map::kBitField2Offset), |
| 1 << Map::kHasFastElements); |
| __ j(zero, &check_pixel_array, not_taken); |
| |
| GenerateFastArrayLoad(masm, |
| edx, |
| eax, |
| ecx, |
| eax, |
| NULL, |
| &slow); |
| __ IncrementCounter(&Counters::keyed_load_generic_smi, 1); |
| __ ret(0); |
| |
| __ bind(&check_pixel_array); |
| // Check whether the elements is a pixel array. |
| // edx: receiver |
| // eax: key |
| __ mov(ecx, FieldOperand(edx, JSObject::kElementsOffset)); |
| __ mov(ebx, eax); |
| __ SmiUntag(ebx); |
| __ 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, |
| eax); |
| // 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); |
| GenerateKeyStringCheck(masm, eax, ecx, ebx, &index_string, &slow); |
| |
| GenerateKeyedLoadReceiverCheck( |
| masm, edx, ecx, Map::kHasNamedInterceptor, &slow); |
| |
| // 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. |
| // 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)); |
| __ sub(edi, Operand(ecx)); |
| __ j(above_equal, &property_array_property); |
| |
| // Load in-object property. |
| __ movzx_b(ecx, FieldOperand(ebx, Map::kInstanceSizeOffset)); |
| __ add(ecx, Operand(edi)); |
| __ mov(eax, FieldOperand(edx, ecx, times_pointer_size, 0)); |
| __ IncrementCounter(&Counters::keyed_load_generic_lookup_cache, 1); |
| __ ret(0); |
| |
| // Load property array property. |
| __ bind(&property_array_property); |
| __ mov(eax, FieldOperand(edx, JSObject::kPropertiesOffset)); |
| __ mov(eax, FieldOperand(eax, edi, times_pointer_size, |
| FixedArray::kHeaderSize)); |
| __ IncrementCounter(&Counters::keyed_load_generic_lookup_cache, 1); |
| __ ret(0); |
| |
| // Do a quick inline probe of the receiver's dictionary, if it |
| // exists. |
| __ bind(&probe_dictionary); |
| |
| __ mov(ecx, FieldOperand(edx, JSObject::kMapOffset)); |
| __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| GenerateGlobalInstanceTypeCheck(masm, ecx, &slow); |
| |
| GenerateDictionaryLoad(masm, &slow, ebx, eax, ecx, edi, eax); |
| __ IncrementCounter(&Counters::keyed_load_generic_symbol, 1); |
| __ ret(0); |
| |
| __ bind(&index_string); |
| __ IndexFromHash(ebx, eax); |
| // Now jump to the place where smi keys are handled. |
| __ jmp(&index_smi); |
| } |
| |
| |
| void KeyedLoadIC::GenerateString(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : key (index) |
| // -- edx : receiver |
| // -- esp[0] : return address |
| // ----------------------------------- |
| Label miss; |
| |
| Register receiver = edx; |
| Register index = eax; |
| Register scratch1 = ebx; |
| Register scratch2 = ecx; |
| Register result = eax; |
| |
| StringCharAtGenerator char_at_generator(receiver, |
| index, |
| scratch1, |
| scratch2, |
| result, |
| &miss, // When not a string. |
| &miss, // When not a number. |
| &miss, // When index out of range. |
| STRING_INDEX_IS_ARRAY_INDEX); |
| char_at_generator.GenerateFast(masm); |
| __ ret(0); |
| |
| StubRuntimeCallHelper call_helper; |
| char_at_generator.GenerateSlow(masm, call_helper); |
| |
| __ 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. |
| __ test_b(FieldOperand(ecx, Map::kBitFieldOffset), |
| 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: 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 an array index, that is Uint32. |
| __ test(eax, Immediate(kSmiTagMask | kSmiSignMask)); |
| __ 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. |
| __ test_b(FieldOperand(edi, Map::kBitFieldOffset), |
| 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 and writable. |
| __ CheckMap(edi, Factory::fixed_array_map(), &check_pixel_array, true); |
| __ cmp(ecx, FieldOperand(edi, FixedArray::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 (a smi) |
| // 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 |
| __ cmp(ecx, FieldOperand(edi, FixedArray::kLengthOffset)); |
| __ j(above_equal, &slow, not_taken); |
| // Add 1 to receiver->length, and go to fast array write. |
| __ add(FieldOperand(edx, JSArray::kLengthOffset), |
| Immediate(Smi::FromInt(1))); |
| __ jmp(&fast); |
| |
| // Array case: Get the length and the elements array from the JS |
| // array. Check that the array is in fast mode (and writable); 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(CodeGenerator::FixedArrayElementOperand(edi, ecx), 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. |
| __ test_b(FieldOperand(edi, Map::kBitFieldOffset), |
| 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: |
| __ Set(ecx, Immediate(0)); |
| __ 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); |
| } |
| |
| |
| // The generated code does not accept smi keys. |
| // The generated code falls through if both probes miss. |
| static void GenerateMonomorphicCacheProbe(MacroAssembler* masm, |
| int argc, |
| Code::Kind kind) { |
| // ----------- S t a t e ------------- |
| // -- ecx : name |
| // -- edx : receiver |
| // ----------------------------------- |
| Label number, non_number, non_string, boolean, probe, miss; |
| |
| // Probe the stub cache. |
| Code::Flags flags = Code::ComputeFlags(kind, |
| NOT_IN_LOOP, |
| MONOMORPHIC, |
| Code::kNoExtraICState, |
| 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); |
| __ CmpInstanceType(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); |
| __ bind(&miss); |
| } |
| |
| |
| static void GenerateFunctionTailCall(MacroAssembler* masm, |
| int argc, |
| Label* miss) { |
| // ----------- S t a t e ------------- |
| // -- ecx : name |
| // -- edi : function |
| // -- esp[0] : return address |
| // -- esp[(argc - n) * 4] : arg[n] (zero-based) |
| // -- ... |
| // -- esp[(argc + 1) * 4] : receiver |
| // ----------------------------------- |
| |
| // 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); |
| |
| // Invoke the function. |
| ParameterCount actual(argc); |
| __ InvokeFunction(edi, actual, JUMP_FUNCTION); |
| } |
| |
| // The generated code falls through if the call should be handled by runtime. |
| static void GenerateCallNormal(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; |
| |
| // Get the receiver of the function from the stack; 1 ~ return address. |
| __ mov(edx, Operand(esp, (argc + 1) * kPointerSize)); |
| |
| GenerateStringDictionaryReceiverCheck(masm, edx, eax, ebx, &miss); |
| |
| // eax: elements |
| // Search the dictionary placing the result in edi. |
| GenerateDictionaryLoad(masm, &miss, eax, ecx, edi, ebx, edi); |
| GenerateFunctionTailCall(masm, argc, &miss); |
| |
| __ bind(&miss); |
| } |
| |
| |
| static void GenerateCallMiss(MacroAssembler* masm, |
| int argc, |
| IC::UtilityId id) { |
| // ----------- S t a t e ------------- |
| // -- ecx : name |
| // -- esp[0] : return address |
| // -- esp[(argc - n) * 4] : arg[n] (zero-based) |
| // -- ... |
| // -- esp[(argc + 1) * 4] : receiver |
| // ----------------------------------- |
| |
| if (id == IC::kCallIC_Miss) { |
| __ IncrementCounter(&Counters::call_miss, 1); |
| } else { |
| __ IncrementCounter(&Counters::keyed_call_miss, 1); |
| } |
| |
| // 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(id)))); |
| __ 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. |
| // This can happen only for regular CallIC but not KeyedCallIC. |
| if (id == IC::kCallIC_Miss) { |
| 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); |
| __ bind(&invoke); |
| } |
| |
| // Invoke the function. |
| ParameterCount actual(argc); |
| __ InvokeFunction(edi, actual, JUMP_FUNCTION); |
| } |
| |
| |
| 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 |
| // ----------------------------------- |
| |
| // Get the receiver of the function from the stack; 1 ~ return address. |
| __ mov(edx, Operand(esp, (argc + 1) * kPointerSize)); |
| GenerateMonomorphicCacheProbe(masm, argc, Code::CALL_IC); |
| GenerateMiss(masm, argc); |
| } |
| |
| |
| 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 |
| // ----------------------------------- |
| |
| GenerateCallNormal(masm, argc); |
| 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 |
| // ----------------------------------- |
| |
| GenerateCallMiss(masm, argc, IC::kCallIC_Miss); |
| } |
| |
| |
| void KeyedCallIC::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 |
| // ----------------------------------- |
| |
| // Get the receiver of the function from the stack; 1 ~ return address. |
| __ mov(edx, Operand(esp, (argc + 1) * kPointerSize)); |
| |
| Label do_call, slow_call, slow_load, slow_reload_receiver; |
| Label check_number_dictionary, check_string, lookup_monomorphic_cache; |
| Label index_smi, index_string; |
| |
| // Check that the key is a smi. |
| __ test(ecx, Immediate(kSmiTagMask)); |
| __ j(not_zero, &check_string, not_taken); |
| |
| __ bind(&index_smi); |
| // Now the key is known to be a smi. This place is also jumped to from |
| // where a numeric string is converted to a smi. |
| |
| GenerateKeyedLoadReceiverCheck( |
| masm, edx, eax, Map::kHasIndexedInterceptor, &slow_call); |
| |
| GenerateFastArrayLoad( |
| masm, edx, ecx, eax, edi, &check_number_dictionary, &slow_load); |
| __ IncrementCounter(&Counters::keyed_call_generic_smi_fast, 1); |
| |
| __ bind(&do_call); |
| // receiver in edx is not used after this point. |
| // ecx: key |
| // edi: function |
| GenerateFunctionTailCall(masm, argc, &slow_call); |
| |
| __ bind(&check_number_dictionary); |
| // eax: elements |
| // ecx: smi key |
| // Check whether the elements is a number dictionary. |
| __ CheckMap(eax, Factory::hash_table_map(), &slow_load, true); |
| __ mov(ebx, ecx); |
| __ SmiUntag(ebx); |
| // ebx: untagged index |
| // Receiver in edx will be clobbered, need to reload it on miss. |
| GenerateNumberDictionaryLoad( |
| masm, &slow_reload_receiver, eax, ecx, ebx, edx, edi, edi); |
| __ IncrementCounter(&Counters::keyed_call_generic_smi_dict, 1); |
| __ jmp(&do_call); |
| |
| __ bind(&slow_reload_receiver); |
| __ mov(edx, Operand(esp, (argc + 1) * kPointerSize)); |
| |
| __ bind(&slow_load); |
| // This branch is taken when calling KeyedCallIC_Miss is neither required |
| // nor beneficial. |
| __ IncrementCounter(&Counters::keyed_call_generic_slow_load, 1); |
| __ EnterInternalFrame(); |
| __ push(ecx); // save the key |
| __ push(edx); // pass the receiver |
| __ push(ecx); // pass the key |
| __ CallRuntime(Runtime::kKeyedGetProperty, 2); |
| __ pop(ecx); // restore the key |
| __ LeaveInternalFrame(); |
| __ mov(edi, eax); |
| __ jmp(&do_call); |
| |
| __ bind(&check_string); |
| GenerateKeyStringCheck(masm, ecx, eax, ebx, &index_string, &slow_call); |
| |
| // The key is known to be a symbol. |
| // If the receiver is a regular JS object with slow properties then do |
| // a quick inline probe of the receiver's dictionary. |
| // Otherwise do the monomorphic cache probe. |
| GenerateKeyedLoadReceiverCheck( |
| masm, edx, eax, Map::kHasNamedInterceptor, &lookup_monomorphic_cache); |
| |
| __ mov(ebx, FieldOperand(edx, JSObject::kPropertiesOffset)); |
| __ CheckMap(ebx, Factory::hash_table_map(), &lookup_monomorphic_cache, true); |
| |
| GenerateDictionaryLoad(masm, &slow_load, ebx, ecx, eax, edi, edi); |
| __ IncrementCounter(&Counters::keyed_call_generic_lookup_dict, 1); |
| __ jmp(&do_call); |
| |
| __ bind(&lookup_monomorphic_cache); |
| __ IncrementCounter(&Counters::keyed_call_generic_lookup_cache, 1); |
| GenerateMonomorphicCacheProbe(masm, argc, Code::KEYED_CALL_IC); |
| // Fall through on miss. |
| |
| __ bind(&slow_call); |
| // This branch is taken if: |
| // - the receiver requires boxing or access check, |
| // - the key is neither smi nor symbol, |
| // - the value loaded is not a function, |
| // - there is hope that the runtime will create a monomorphic call stub |
| // that will get fetched next time. |
| __ IncrementCounter(&Counters::keyed_call_generic_slow, 1); |
| GenerateMiss(masm, argc); |
| |
| __ bind(&index_string); |
| __ IndexFromHash(ebx, ecx); |
| // Now jump to the place where smi keys are handled. |
| __ jmp(&index_smi); |
| } |
| |
| |
| void KeyedCallIC::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 |
| // ----------------------------------- |
| |
| GenerateCallNormal(masm, argc); |
| GenerateMiss(masm, argc); |
| } |
| |
| |
| void KeyedCallIC::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 |
| // ----------------------------------- |
| |
| GenerateCallMiss(masm, argc, IC::kKeyedCallIC_Miss); |
| } |
| |
| |
| 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; |
| |
| GenerateStringDictionaryReceiverCheck(masm, eax, edx, ebx, &miss); |
| |
| // edx: elements |
| // Search the dictionary placing the result in eax. |
| GenerateDictionaryLoad(masm, &miss, edx, ecx, edi, ebx, eax); |
| __ ret(0); |
| |
| // Cache miss: 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 |
| // ----------------------------------- |
| |
| __ IncrementCounter(&Counters::load_miss, 1); |
| |
| __ 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); |
| } |
| |
| |
| bool LoadIC::PatchInlinedLoad(Address address, Object* map, int offset) { |
| if (V8::UseCrankshaft()) return false; |
| |
| // 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 != Assembler::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; |
| } |
| |
| |
| // One byte opcode for mov ecx,0xXXXXXXXX. |
| // Marks inlined contextual loads using all kinds of cells. Generated |
| // code has the hole check: |
| // mov reg, <cell> |
| // mov reg, (<cell>, value offset) |
| // cmp reg, <the hole> |
| // je slow |
| // ;; use reg |
| static const byte kMovEcxByte = 0xB9; |
| |
| // One byte opcode for mov edx,0xXXXXXXXX. |
| // Marks inlined contextual loads using only "don't delete" |
| // cells. Generated code doesn't have the hole check: |
| // mov reg, <cell> |
| // mov reg, (<cell>, value offset) |
| // ;; use reg |
| static const byte kMovEdxByte = 0xBA; |
| |
| bool LoadIC::PatchInlinedContextualLoad(Address address, |
| Object* map, |
| Object* cell, |
| bool is_dont_delete) { |
| if (V8::UseCrankshaft()) return false; |
| |
| // The address of the instruction following the call. |
| Address mov_instruction_address = |
| address + Assembler::kCallTargetAddressOffset; |
| // If the instruction following the call is not a mov ecx/edx, |
| // nothing was inlined. |
| byte b = *mov_instruction_address; |
| if (b != kMovEcxByte && b != kMovEdxByte) return false; |
| // If we don't have the hole check generated, we can only support |
| // "don't delete" cells. |
| if (b == kMovEdxByte && !is_dont_delete) return false; |
| |
| Address delta_address = mov_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 = mov_instruction_address + delta + 3; |
| *(reinterpret_cast<Object**>(map_address)) = map; |
| |
| // The cell is in the last 4 bytes of a five byte mov reg, imm32 |
| // instruction, so we add 1 to get the offset to the last 4 bytes. |
| Address offset_address = |
| mov_instruction_address + delta + kOffsetToLoadInstruction + 1; |
| *reinterpret_cast<Object**>(offset_address) = cell; |
| return true; |
| } |
| |
| |
| bool StoreIC::PatchInlinedStore(Address address, Object* map, int offset) { |
| if (V8::UseCrankshaft()) return false; |
| |
| // 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 != Assembler::kTestEaxByte) return false; |
| |
| // Extract the encoded deltas from the test eax instruction. |
| Address encoded_offsets_address = test_instruction_address + 1; |
| int encoded_offsets = *reinterpret_cast<int*>(encoded_offsets_address); |
| int delta_to_map_check = -(encoded_offsets & 0xFFFF); |
| int delta_to_record_write = encoded_offsets >> 16; |
| |
| // Patch the map to check. The map address is the last 4 bytes of |
| // the 7-byte operand-immediate compare instruction. |
| Address map_check_address = test_instruction_address + delta_to_map_check; |
| Address map_address = map_check_address + 3; |
| *(reinterpret_cast<Object**>(map_address)) = map; |
| |
| // Patch the offset in the store instruction. The offset is in the |
| // last 4 bytes of a six byte register-to-memory move instruction. |
| Address offset_address = |
| map_check_address + StoreIC::kOffsetToStoreInstruction + 2; |
| // The offset should have initial value (kMaxInt - 1), cleared value |
| // (-1) or we should be clearing the inlined version. |
| ASSERT(*reinterpret_cast<int*>(offset_address) == kMaxInt - 1 || |
| *reinterpret_cast<int*>(offset_address) == -1 || |
| (offset == 0 && map == Heap::null_value())); |
| *reinterpret_cast<int*>(offset_address) = offset - kHeapObjectTag; |
| |
| // Patch the offset in the write-barrier code. The offset is the |
| // last 4 bytes of a six byte lea instruction. |
| offset_address = map_check_address + delta_to_record_write + 2; |
| // The offset should have initial value (kMaxInt), cleared value |
| // (-1) or we should be clearing the inlined version. |
| ASSERT(*reinterpret_cast<int*>(offset_address) == kMaxInt || |
| *reinterpret_cast<int*>(offset_address) == -1 || |
| (offset == 0 && map == Heap::null_value())); |
| *reinterpret_cast<int*>(offset_address) = offset - kHeapObjectTag; |
| |
| return true; |
| } |
| |
| |
| static bool PatchInlinedMapCheck(Address address, Object* map) { |
| if (V8::UseCrankshaft()) return false; |
| |
| 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 != Assembler::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); |
| } |
| |
| |
| void KeyedLoadIC::GenerateMiss(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : key |
| // -- edx : receiver |
| // -- esp[0] : return address |
| // ----------------------------------- |
| |
| __ IncrementCounter(&Counters::keyed_load_miss, 1); |
| |
| __ 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); |
| } |
| |
| |
| // The offset from the inlined patch site to the start of the inlined |
| // store instruction. It is 7 bytes (test reg, imm) plus 6 bytes (jne |
| // slow_label). |
| const int StoreIC::kOffsetToStoreInstruction = 13; |
| |
| |
| 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. |
| // We rely on StoreIC_ArrayLength below to deal with all types of |
| // fast elements (including COW). |
| __ 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); |
| } |
| |
| |
| void StoreIC::GenerateNormal(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- eax : value |
| // -- ecx : name |
| // -- edx : receiver |
| // -- esp[0] : return address |
| // ----------------------------------- |
| |
| Label miss, restore_miss; |
| |
| GenerateStringDictionaryReceiverCheck(masm, edx, ebx, edi, &miss); |
| |
| // A lot of registers are needed for storing to slow case |
| // objects. Push and restore receiver but rely on |
| // GenerateDictionaryStore preserving the value and name. |
| __ push(edx); |
| GenerateDictionaryStore(masm, &restore_miss, ebx, ecx, eax, edx, edi); |
| __ Drop(1); |
| __ IncrementCounter(&Counters::store_normal_hit, 1); |
| __ ret(0); |
| |
| __ bind(&restore_miss); |
| __ pop(edx); |
| |
| __ bind(&miss); |
| __ IncrementCounter(&Counters::store_normal_miss, 1); |
| GenerateMiss(masm); |
| } |
| |
| |
| void StoreIC::GenerateGlobalProxy(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); |
| |
| // Do tail-call to runtime routine. |
| __ TailCallRuntime(Runtime::kSetProperty, 3, 1); |
| } |
| |
| |
| 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 __ |
| |
| |
| Condition CompareIC::ComputeCondition(Token::Value op) { |
| switch (op) { |
| case Token::EQ_STRICT: |
| case Token::EQ: |
| return equal; |
| case Token::LT: |
| return less; |
| case Token::GT: |
| // Reverse left and right operands to obtain ECMA-262 conversion order. |
| return less; |
| case Token::LTE: |
| // Reverse left and right operands to obtain ECMA-262 conversion order. |
| return greater_equal; |
| case Token::GTE: |
| return greater_equal; |
| default: |
| UNREACHABLE(); |
| return no_condition; |
| } |
| } |
| |
| |
| static bool HasInlinedSmiCode(Address address) { |
| // 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 al, nothing |
| // was inlined. |
| return *test_instruction_address == Assembler::kTestAlByte; |
| } |
| |
| |
| void CompareIC::UpdateCaches(Handle<Object> x, Handle<Object> y) { |
| HandleScope scope; |
| Handle<Code> rewritten; |
| State previous_state = GetState(); |
| |
| State state = TargetState(previous_state, HasInlinedSmiCode(address()), x, y); |
| if (state == GENERIC) { |
| CompareStub stub(GetCondition(), strict(), NO_COMPARE_FLAGS); |
| rewritten = stub.GetCode(); |
| } else { |
| ICCompareStub stub(op_, state); |
| rewritten = stub.GetCode(); |
| } |
| set_target(*rewritten); |
| |
| #ifdef DEBUG |
| if (FLAG_trace_ic) { |
| PrintF("[CompareIC (%s->%s)#%s]\n", |
| GetStateName(previous_state), |
| GetStateName(state), |
| Token::Name(op_)); |
| } |
| #endif |
| |
| // Activate inlined smi code. |
| if (previous_state == UNINITIALIZED) { |
| PatchInlinedSmiCode(address()); |
| } |
| } |
| |
| |
| void PatchInlinedSmiCode(Address address) { |
| // 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 al, nothing |
| // was inlined. |
| if (*test_instruction_address != Assembler::kTestAlByte) { |
| ASSERT(*test_instruction_address == Assembler::kNopByte); |
| return; |
| } |
| |
| Address delta_address = test_instruction_address + 1; |
| // The delta to the start of the map check instruction and the |
| // condition code uses at the patched jump. |
| int8_t delta = *reinterpret_cast<int8_t*>(delta_address); |
| if (FLAG_trace_ic) { |
| PrintF("[ patching ic at %p, test=%p, delta=%d\n", |
| address, test_instruction_address, delta); |
| } |
| |
| // Patch with a short conditional jump. There must be a |
| // short jump-if-carry/not-carry at this position. |
| Address jmp_address = test_instruction_address - delta; |
| ASSERT(*jmp_address == Assembler::kJncShortOpcode || |
| *jmp_address == Assembler::kJcShortOpcode); |
| Condition cc = *jmp_address == Assembler::kJncShortOpcode |
| ? not_zero |
| : zero; |
| *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | cc); |
| } |
| |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_TARGET_ARCH_IA32 |
