| // Copyright 2012 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_ARM) |
| |
| #include "ic-inl.h" |
| #include "codegen.h" |
| #include "stub-cache.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| #define __ ACCESS_MASM(masm) |
| |
| |
| static void ProbeTable(Isolate* isolate, |
| MacroAssembler* masm, |
| Code::Flags flags, |
| StubCache::Table table, |
| Register receiver, |
| Register name, |
| // Number of the cache entry, not scaled. |
| Register offset, |
| Register scratch, |
| Register scratch2, |
| Register offset_scratch) { |
| ExternalReference key_offset(isolate->stub_cache()->key_reference(table)); |
| ExternalReference value_offset(isolate->stub_cache()->value_reference(table)); |
| ExternalReference map_offset(isolate->stub_cache()->map_reference(table)); |
| |
| uint32_t key_off_addr = reinterpret_cast<uint32_t>(key_offset.address()); |
| uint32_t value_off_addr = reinterpret_cast<uint32_t>(value_offset.address()); |
| uint32_t map_off_addr = reinterpret_cast<uint32_t>(map_offset.address()); |
| |
| // Check the relative positions of the address fields. |
| ASSERT(value_off_addr > key_off_addr); |
| ASSERT((value_off_addr - key_off_addr) % 4 == 0); |
| ASSERT((value_off_addr - key_off_addr) < (256 * 4)); |
| ASSERT(map_off_addr > key_off_addr); |
| ASSERT((map_off_addr - key_off_addr) % 4 == 0); |
| ASSERT((map_off_addr - key_off_addr) < (256 * 4)); |
| |
| Label miss; |
| Register base_addr = scratch; |
| scratch = no_reg; |
| |
| // Multiply by 3 because there are 3 fields per entry (name, code, map). |
| __ add(offset_scratch, offset, Operand(offset, LSL, 1)); |
| |
| // Calculate the base address of the entry. |
| __ mov(base_addr, Operand(key_offset)); |
| __ add(base_addr, base_addr, Operand(offset_scratch, LSL, kPointerSizeLog2)); |
| |
| // Check that the key in the entry matches the name. |
| __ ldr(ip, MemOperand(base_addr, 0)); |
| __ cmp(name, ip); |
| __ b(ne, &miss); |
| |
| // Check the map matches. |
| __ ldr(ip, MemOperand(base_addr, map_off_addr - key_off_addr)); |
| __ ldr(scratch2, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| __ cmp(ip, scratch2); |
| __ b(ne, &miss); |
| |
| // Get the code entry from the cache. |
| Register code = scratch2; |
| scratch2 = no_reg; |
| __ ldr(code, MemOperand(base_addr, value_off_addr - key_off_addr)); |
| |
| // Check that the flags match what we're looking for. |
| Register flags_reg = base_addr; |
| base_addr = no_reg; |
| __ ldr(flags_reg, FieldMemOperand(code, Code::kFlagsOffset)); |
| // It's a nice optimization if this constant is encodable in the bic insn. |
| |
| uint32_t mask = Code::kFlagsNotUsedInLookup; |
| ASSERT(__ ImmediateFitsAddrMode1Instruction(mask)); |
| __ bic(flags_reg, flags_reg, Operand(mask)); |
| // Using cmn and the negative instead of cmp means we can use movw. |
| if (flags < 0) { |
| __ cmn(flags_reg, Operand(-flags)); |
| } else { |
| __ cmp(flags_reg, Operand(flags)); |
| } |
| __ b(ne, &miss); |
| |
| #ifdef DEBUG |
| if (FLAG_test_secondary_stub_cache && table == StubCache::kPrimary) { |
| __ jmp(&miss); |
| } else if (FLAG_test_primary_stub_cache && table == StubCache::kSecondary) { |
| __ jmp(&miss); |
| } |
| #endif |
| |
| // Jump to the first instruction in the code stub. |
| __ add(pc, code, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| |
| // Miss: fall through. |
| __ bind(&miss); |
| } |
| |
| |
| // Helper function used to check that the dictionary doesn't contain |
| // the property. This function may return false negatives, so miss_label |
| // must always call a backup property check that is complete. |
| // This function is safe to call if the receiver has fast properties. |
| // Name must be a symbol and receiver must be a heap object. |
| static void GenerateDictionaryNegativeLookup(MacroAssembler* masm, |
| Label* miss_label, |
| Register receiver, |
| Handle<String> name, |
| Register scratch0, |
| Register scratch1) { |
| ASSERT(name->IsSymbol()); |
| Counters* counters = masm->isolate()->counters(); |
| __ IncrementCounter(counters->negative_lookups(), 1, scratch0, scratch1); |
| __ IncrementCounter(counters->negative_lookups_miss(), 1, scratch0, scratch1); |
| |
| Label done; |
| |
| const int kInterceptorOrAccessCheckNeededMask = |
| (1 << Map::kHasNamedInterceptor) | (1 << Map::kIsAccessCheckNeeded); |
| |
| // Bail out if the receiver has a named interceptor or requires access checks. |
| Register map = scratch1; |
| __ ldr(map, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| __ ldrb(scratch0, FieldMemOperand(map, Map::kBitFieldOffset)); |
| __ tst(scratch0, Operand(kInterceptorOrAccessCheckNeededMask)); |
| __ b(ne, miss_label); |
| |
| // Check that receiver is a JSObject. |
| __ ldrb(scratch0, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| __ cmp(scratch0, Operand(FIRST_SPEC_OBJECT_TYPE)); |
| __ b(lt, miss_label); |
| |
| // Load properties array. |
| Register properties = scratch0; |
| __ ldr(properties, FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
| // Check that the properties array is a dictionary. |
| __ ldr(map, FieldMemOperand(properties, HeapObject::kMapOffset)); |
| Register tmp = properties; |
| __ LoadRoot(tmp, Heap::kHashTableMapRootIndex); |
| __ cmp(map, tmp); |
| __ b(ne, miss_label); |
| |
| // Restore the temporarily used register. |
| __ ldr(properties, FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
| |
| |
| StringDictionaryLookupStub::GenerateNegativeLookup(masm, |
| miss_label, |
| &done, |
| receiver, |
| properties, |
| name, |
| scratch1); |
| __ bind(&done); |
| __ DecrementCounter(counters->negative_lookups_miss(), 1, scratch0, scratch1); |
| } |
| |
| |
| void StubCache::GenerateProbe(MacroAssembler* masm, |
| Code::Flags flags, |
| Register receiver, |
| Register name, |
| Register scratch, |
| Register extra, |
| Register extra2, |
| Register extra3) { |
| Isolate* isolate = masm->isolate(); |
| Label miss; |
| |
| // Make sure that code is valid. The multiplying code relies on the |
| // entry size being 12. |
| ASSERT(sizeof(Entry) == 12); |
| |
| // Make sure the flags does not name a specific type. |
| ASSERT(Code::ExtractTypeFromFlags(flags) == 0); |
| |
| // Make sure that there are no register conflicts. |
| ASSERT(!scratch.is(receiver)); |
| ASSERT(!scratch.is(name)); |
| ASSERT(!extra.is(receiver)); |
| ASSERT(!extra.is(name)); |
| ASSERT(!extra.is(scratch)); |
| ASSERT(!extra2.is(receiver)); |
| ASSERT(!extra2.is(name)); |
| ASSERT(!extra2.is(scratch)); |
| ASSERT(!extra2.is(extra)); |
| |
| // Check scratch, extra and extra2 registers are valid. |
| ASSERT(!scratch.is(no_reg)); |
| ASSERT(!extra.is(no_reg)); |
| ASSERT(!extra2.is(no_reg)); |
| ASSERT(!extra3.is(no_reg)); |
| |
| Counters* counters = masm->isolate()->counters(); |
| __ IncrementCounter(counters->megamorphic_stub_cache_probes(), 1, |
| extra2, extra3); |
| |
| // Check that the receiver isn't a smi. |
| __ JumpIfSmi(receiver, &miss); |
| |
| // Get the map of the receiver and compute the hash. |
| __ ldr(scratch, FieldMemOperand(name, String::kHashFieldOffset)); |
| __ ldr(ip, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| __ add(scratch, scratch, Operand(ip)); |
| uint32_t mask = kPrimaryTableSize - 1; |
| // We shift out the last two bits because they are not part of the hash and |
| // they are always 01 for maps. |
| __ mov(scratch, Operand(scratch, LSR, kHeapObjectTagSize)); |
| // Mask down the eor argument to the minimum to keep the immediate |
| // ARM-encodable. |
| __ eor(scratch, scratch, Operand((flags >> kHeapObjectTagSize) & mask)); |
| // Prefer and_ to ubfx here because ubfx takes 2 cycles. |
| __ and_(scratch, scratch, Operand(mask)); |
| |
| // Probe the primary table. |
| ProbeTable(isolate, |
| masm, |
| flags, |
| kPrimary, |
| receiver, |
| name, |
| scratch, |
| extra, |
| extra2, |
| extra3); |
| |
| // Primary miss: Compute hash for secondary probe. |
| __ sub(scratch, scratch, Operand(name, LSR, kHeapObjectTagSize)); |
| uint32_t mask2 = kSecondaryTableSize - 1; |
| __ add(scratch, scratch, Operand((flags >> kHeapObjectTagSize) & mask2)); |
| __ and_(scratch, scratch, Operand(mask2)); |
| |
| // Probe the secondary table. |
| ProbeTable(isolate, |
| masm, |
| flags, |
| kSecondary, |
| receiver, |
| name, |
| scratch, |
| extra, |
| extra2, |
| extra3); |
| |
| // Cache miss: Fall-through and let caller handle the miss by |
| // entering the runtime system. |
| __ bind(&miss); |
| __ IncrementCounter(counters->megamorphic_stub_cache_misses(), 1, |
| extra2, extra3); |
| } |
| |
| |
| void StubCompiler::GenerateLoadGlobalFunctionPrototype(MacroAssembler* masm, |
| int index, |
| Register prototype) { |
| // Load the global or builtins object from the current context. |
| __ ldr(prototype, |
| MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
| // Load the native context from the global or builtins object. |
| __ ldr(prototype, |
| FieldMemOperand(prototype, GlobalObject::kNativeContextOffset)); |
| // Load the function from the native context. |
| __ ldr(prototype, MemOperand(prototype, Context::SlotOffset(index))); |
| // Load the initial map. The global functions all have initial maps. |
| __ ldr(prototype, |
| FieldMemOperand(prototype, JSFunction::kPrototypeOrInitialMapOffset)); |
| // Load the prototype from the initial map. |
| __ ldr(prototype, FieldMemOperand(prototype, Map::kPrototypeOffset)); |
| } |
| |
| |
| void StubCompiler::GenerateDirectLoadGlobalFunctionPrototype( |
| MacroAssembler* masm, |
| int index, |
| Register prototype, |
| Label* miss) { |
| Isolate* isolate = masm->isolate(); |
| // Check we're still in the same context. |
| __ ldr(prototype, |
| MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
| __ Move(ip, isolate->global_object()); |
| __ cmp(prototype, ip); |
| __ b(ne, miss); |
| // Get the global function with the given index. |
| Handle<JSFunction> function( |
| JSFunction::cast(isolate->native_context()->get(index))); |
| // Load its initial map. The global functions all have initial maps. |
| __ Move(prototype, Handle<Map>(function->initial_map())); |
| // Load the prototype from the initial map. |
| __ ldr(prototype, FieldMemOperand(prototype, Map::kPrototypeOffset)); |
| } |
| |
| |
| // Load a fast property out of a holder object (src). In-object properties |
| // are loaded directly otherwise the property is loaded from the properties |
| // fixed array. |
| void StubCompiler::GenerateFastPropertyLoad(MacroAssembler* masm, |
| Register dst, |
| Register src, |
| Handle<JSObject> holder, |
| PropertyIndex index) { |
| if (index.is_header_index()) { |
| int offset = index.header_index() * kPointerSize; |
| __ ldr(dst, FieldMemOperand(src, offset)); |
| } else { |
| // Adjust for the number of properties stored in the holder. |
| int slot = index.field_index() - holder->map()->inobject_properties(); |
| if (slot < 0) { |
| // Get the property straight out of the holder. |
| int offset = holder->map()->instance_size() + (slot * kPointerSize); |
| __ ldr(dst, FieldMemOperand(src, offset)); |
| } else { |
| // Calculate the offset into the properties array. |
| int offset = slot * kPointerSize + FixedArray::kHeaderSize; |
| __ ldr(dst, FieldMemOperand(src, JSObject::kPropertiesOffset)); |
| __ ldr(dst, FieldMemOperand(dst, offset)); |
| } |
| } |
| } |
| |
| |
| void StubCompiler::GenerateLoadArrayLength(MacroAssembler* masm, |
| Register receiver, |
| Register scratch, |
| Label* miss_label) { |
| // Check that the receiver isn't a smi. |
| __ JumpIfSmi(receiver, miss_label); |
| |
| // Check that the object is a JS array. |
| __ CompareObjectType(receiver, scratch, scratch, JS_ARRAY_TYPE); |
| __ b(ne, miss_label); |
| |
| // Load length directly from the JS array. |
| __ ldr(r0, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
| __ Ret(); |
| } |
| |
| |
| // Generate code to check if an object is a string. If the object is a |
| // heap object, its map's instance type is left in the scratch1 register. |
| // If this is not needed, scratch1 and scratch2 may be the same register. |
| static void GenerateStringCheck(MacroAssembler* masm, |
| Register receiver, |
| Register scratch1, |
| Register scratch2, |
| Label* smi, |
| Label* non_string_object) { |
| // Check that the receiver isn't a smi. |
| __ JumpIfSmi(receiver, smi); |
| |
| // Check that the object is a string. |
| __ ldr(scratch1, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| __ ldrb(scratch1, FieldMemOperand(scratch1, Map::kInstanceTypeOffset)); |
| __ and_(scratch2, scratch1, Operand(kIsNotStringMask)); |
| // The cast is to resolve the overload for the argument of 0x0. |
| __ cmp(scratch2, Operand(static_cast<int32_t>(kStringTag))); |
| __ b(ne, non_string_object); |
| } |
| |
| |
| // Generate code to load the length from a string object and return the length. |
| // If the receiver object is not a string or a wrapped string object the |
| // execution continues at the miss label. The register containing the |
| // receiver is potentially clobbered. |
| void StubCompiler::GenerateLoadStringLength(MacroAssembler* masm, |
| Register receiver, |
| Register scratch1, |
| Register scratch2, |
| Label* miss, |
| bool support_wrappers) { |
| Label check_wrapper; |
| |
| // Check if the object is a string leaving the instance type in the |
| // scratch1 register. |
| GenerateStringCheck(masm, receiver, scratch1, scratch2, miss, |
| support_wrappers ? &check_wrapper : miss); |
| |
| // Load length directly from the string. |
| __ ldr(r0, FieldMemOperand(receiver, String::kLengthOffset)); |
| __ Ret(); |
| |
| if (support_wrappers) { |
| // Check if the object is a JSValue wrapper. |
| __ bind(&check_wrapper); |
| __ cmp(scratch1, Operand(JS_VALUE_TYPE)); |
| __ b(ne, miss); |
| |
| // Unwrap the value and check if the wrapped value is a string. |
| __ ldr(scratch1, FieldMemOperand(receiver, JSValue::kValueOffset)); |
| GenerateStringCheck(masm, scratch1, scratch2, scratch2, miss, miss); |
| __ ldr(r0, FieldMemOperand(scratch1, String::kLengthOffset)); |
| __ Ret(); |
| } |
| } |
| |
| |
| void StubCompiler::GenerateLoadFunctionPrototype(MacroAssembler* masm, |
| Register receiver, |
| Register scratch1, |
| Register scratch2, |
| Label* miss_label) { |
| __ TryGetFunctionPrototype(receiver, scratch1, scratch2, miss_label); |
| __ mov(r0, scratch1); |
| __ Ret(); |
| } |
| |
| |
| // Generate StoreField code, value is passed in r0 register. |
| // When leaving generated code after success, the receiver_reg and name_reg |
| // may be clobbered. Upon branch to miss_label, the receiver and name |
| // registers have their original values. |
| void StubCompiler::GenerateStoreField(MacroAssembler* masm, |
| Handle<JSObject> object, |
| int index, |
| Handle<Map> transition, |
| Handle<String> name, |
| Register receiver_reg, |
| Register name_reg, |
| Register scratch1, |
| Register scratch2, |
| Label* miss_label) { |
| // r0 : value |
| Label exit; |
| |
| LookupResult lookup(masm->isolate()); |
| object->Lookup(*name, &lookup); |
| if (lookup.IsFound() && (lookup.IsReadOnly() || !lookup.IsCacheable())) { |
| // In sloppy mode, we could just return the value and be done. However, we |
| // might be in strict mode, where we have to throw. Since we cannot tell, |
| // go into slow case unconditionally. |
| __ jmp(miss_label); |
| return; |
| } |
| |
| // Check that the map of the object hasn't changed. |
| CompareMapMode mode = transition.is_null() ? ALLOW_ELEMENT_TRANSITION_MAPS |
| : REQUIRE_EXACT_MAP; |
| __ CheckMap(receiver_reg, scratch1, Handle<Map>(object->map()), miss_label, |
| DO_SMI_CHECK, mode); |
| |
| // Perform global security token check if needed. |
| if (object->IsJSGlobalProxy()) { |
| __ CheckAccessGlobalProxy(receiver_reg, scratch1, miss_label); |
| } |
| |
| // Check that we are allowed to write this. |
| if (!transition.is_null() && object->GetPrototype()->IsJSObject()) { |
| JSObject* holder; |
| if (lookup.IsFound()) { |
| holder = lookup.holder(); |
| } else { |
| // Find the top object. |
| holder = *object; |
| do { |
| holder = JSObject::cast(holder->GetPrototype()); |
| } while (holder->GetPrototype()->IsJSObject()); |
| } |
| // We need an extra register, push |
| __ push(name_reg); |
| Label miss_pop, done_check; |
| CheckPrototypes(object, receiver_reg, Handle<JSObject>(holder), name_reg, |
| scratch1, scratch2, name, &miss_pop); |
| __ jmp(&done_check); |
| __ bind(&miss_pop); |
| __ pop(name_reg); |
| __ jmp(miss_label); |
| __ bind(&done_check); |
| __ pop(name_reg); |
| } |
| |
| // Stub never generated for non-global objects that require access |
| // checks. |
| ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded()); |
| |
| // Perform map transition for the receiver if necessary. |
| if (!transition.is_null() && (object->map()->unused_property_fields() == 0)) { |
| // The properties must be extended before we can store the value. |
| // We jump to a runtime call that extends the properties array. |
| __ push(receiver_reg); |
| __ mov(r2, Operand(transition)); |
| __ Push(r2, r0); |
| __ TailCallExternalReference( |
| ExternalReference(IC_Utility(IC::kSharedStoreIC_ExtendStorage), |
| masm->isolate()), |
| 3, |
| 1); |
| return; |
| } |
| |
| if (!transition.is_null()) { |
| // Update the map of the object. |
| __ mov(scratch1, Operand(transition)); |
| __ str(scratch1, FieldMemOperand(receiver_reg, HeapObject::kMapOffset)); |
| |
| // Update the write barrier for the map field and pass the now unused |
| // name_reg as scratch register. |
| __ RecordWriteField(receiver_reg, |
| HeapObject::kMapOffset, |
| scratch1, |
| name_reg, |
| kLRHasNotBeenSaved, |
| kDontSaveFPRegs, |
| OMIT_REMEMBERED_SET, |
| OMIT_SMI_CHECK); |
| } |
| |
| // Adjust for the number of properties stored in the object. Even in the |
| // face of a transition we can use the old map here because the size of the |
| // object and the number of in-object properties is not going to change. |
| index -= object->map()->inobject_properties(); |
| |
| if (index < 0) { |
| // Set the property straight into the object. |
| int offset = object->map()->instance_size() + (index * kPointerSize); |
| __ str(r0, FieldMemOperand(receiver_reg, offset)); |
| |
| // Skip updating write barrier if storing a smi. |
| __ JumpIfSmi(r0, &exit); |
| |
| // Update the write barrier for the array address. |
| // Pass the now unused name_reg as a scratch register. |
| __ mov(name_reg, r0); |
| __ RecordWriteField(receiver_reg, |
| offset, |
| name_reg, |
| scratch1, |
| kLRHasNotBeenSaved, |
| kDontSaveFPRegs); |
| } else { |
| // Write to the properties array. |
| int offset = index * kPointerSize + FixedArray::kHeaderSize; |
| // Get the properties array |
| __ ldr(scratch1, |
| FieldMemOperand(receiver_reg, JSObject::kPropertiesOffset)); |
| __ str(r0, FieldMemOperand(scratch1, offset)); |
| |
| // Skip updating write barrier if storing a smi. |
| __ JumpIfSmi(r0, &exit); |
| |
| // Update the write barrier for the array address. |
| // Ok to clobber receiver_reg and name_reg, since we return. |
| __ mov(name_reg, r0); |
| __ RecordWriteField(scratch1, |
| offset, |
| name_reg, |
| receiver_reg, |
| kLRHasNotBeenSaved, |
| kDontSaveFPRegs); |
| } |
| |
| // Return the value (register r0). |
| __ bind(&exit); |
| __ Ret(); |
| } |
| |
| |
| void StubCompiler::GenerateLoadMiss(MacroAssembler* masm, Code::Kind kind) { |
| ASSERT(kind == Code::LOAD_IC || kind == Code::KEYED_LOAD_IC); |
| Handle<Code> code = (kind == Code::LOAD_IC) |
| ? masm->isolate()->builtins()->LoadIC_Miss() |
| : masm->isolate()->builtins()->KeyedLoadIC_Miss(); |
| __ Jump(code, RelocInfo::CODE_TARGET); |
| } |
| |
| |
| void StubCompiler::GenerateStoreMiss(MacroAssembler* masm, Code::Kind kind) { |
| ASSERT(kind == Code::STORE_IC || kind == Code::KEYED_STORE_IC); |
| Handle<Code> code = (kind == Code::STORE_IC) |
| ? masm->isolate()->builtins()->StoreIC_Miss() |
| : masm->isolate()->builtins()->KeyedStoreIC_Miss(); |
| __ Jump(code, RelocInfo::CODE_TARGET); |
| } |
| |
| |
| static void GenerateCallFunction(MacroAssembler* masm, |
| Handle<Object> object, |
| const ParameterCount& arguments, |
| Label* miss, |
| Code::ExtraICState extra_ic_state) { |
| // ----------- S t a t e ------------- |
| // -- r0: receiver |
| // -- r1: function to call |
| // ----------------------------------- |
| |
| // Check that the function really is a function. |
| __ JumpIfSmi(r1, miss); |
| __ CompareObjectType(r1, r3, r3, JS_FUNCTION_TYPE); |
| __ b(ne, miss); |
| |
| // Patch the receiver on the stack with the global proxy if |
| // necessary. |
| if (object->IsGlobalObject()) { |
| __ ldr(r3, FieldMemOperand(r0, GlobalObject::kGlobalReceiverOffset)); |
| __ str(r3, MemOperand(sp, arguments.immediate() * kPointerSize)); |
| } |
| |
| // Invoke the function. |
| CallKind call_kind = CallICBase::Contextual::decode(extra_ic_state) |
| ? CALL_AS_FUNCTION |
| : CALL_AS_METHOD; |
| __ InvokeFunction(r1, arguments, JUMP_FUNCTION, NullCallWrapper(), call_kind); |
| } |
| |
| |
| static void PushInterceptorArguments(MacroAssembler* masm, |
| Register receiver, |
| Register holder, |
| Register name, |
| Handle<JSObject> holder_obj) { |
| __ push(name); |
| Handle<InterceptorInfo> interceptor(holder_obj->GetNamedInterceptor()); |
| ASSERT(!masm->isolate()->heap()->InNewSpace(*interceptor)); |
| Register scratch = name; |
| __ mov(scratch, Operand(interceptor)); |
| __ push(scratch); |
| __ push(receiver); |
| __ push(holder); |
| __ ldr(scratch, FieldMemOperand(scratch, InterceptorInfo::kDataOffset)); |
| __ push(scratch); |
| __ mov(scratch, Operand(ExternalReference::isolate_address())); |
| __ push(scratch); |
| } |
| |
| |
| static void CompileCallLoadPropertyWithInterceptor( |
| MacroAssembler* masm, |
| Register receiver, |
| Register holder, |
| Register name, |
| Handle<JSObject> holder_obj) { |
| PushInterceptorArguments(masm, receiver, holder, name, holder_obj); |
| |
| ExternalReference ref = |
| ExternalReference(IC_Utility(IC::kLoadPropertyWithInterceptorOnly), |
| masm->isolate()); |
| __ mov(r0, Operand(6)); |
| __ mov(r1, Operand(ref)); |
| |
| CEntryStub stub(1); |
| __ CallStub(&stub); |
| } |
| |
| |
| static const int kFastApiCallArguments = 4; |
| |
| // Reserves space for the extra arguments to API function in the |
| // caller's frame. |
| // |
| // These arguments are set by CheckPrototypes and GenerateFastApiDirectCall. |
| static void ReserveSpaceForFastApiCall(MacroAssembler* masm, |
| Register scratch) { |
| __ mov(scratch, Operand(Smi::FromInt(0))); |
| for (int i = 0; i < kFastApiCallArguments; i++) { |
| __ push(scratch); |
| } |
| } |
| |
| |
| // Undoes the effects of ReserveSpaceForFastApiCall. |
| static void FreeSpaceForFastApiCall(MacroAssembler* masm) { |
| __ Drop(kFastApiCallArguments); |
| } |
| |
| |
| static void GenerateFastApiDirectCall(MacroAssembler* masm, |
| const CallOptimization& optimization, |
| int argc) { |
| // ----------- S t a t e ------------- |
| // -- sp[0] : holder (set by CheckPrototypes) |
| // -- sp[4] : callee JS function |
| // -- sp[8] : call data |
| // -- sp[12] : isolate |
| // -- sp[16] : last JS argument |
| // -- ... |
| // -- sp[(argc + 3) * 4] : first JS argument |
| // -- sp[(argc + 4) * 4] : receiver |
| // ----------------------------------- |
| // Get the function and setup the context. |
| Handle<JSFunction> function = optimization.constant_function(); |
| __ LoadHeapObject(r5, function); |
| __ ldr(cp, FieldMemOperand(r5, JSFunction::kContextOffset)); |
| |
| // Pass the additional arguments. |
| Handle<CallHandlerInfo> api_call_info = optimization.api_call_info(); |
| Handle<Object> call_data(api_call_info->data()); |
| if (masm->isolate()->heap()->InNewSpace(*call_data)) { |
| __ Move(r0, api_call_info); |
| __ ldr(r6, FieldMemOperand(r0, CallHandlerInfo::kDataOffset)); |
| } else { |
| __ Move(r6, call_data); |
| } |
| __ mov(r7, Operand(ExternalReference::isolate_address())); |
| // Store JS function, call data and isolate. |
| __ stm(ib, sp, r5.bit() | r6.bit() | r7.bit()); |
| |
| // Prepare arguments. |
| __ add(r2, sp, Operand(3 * kPointerSize)); |
| |
| // Allocate the v8::Arguments structure in the arguments' space since |
| // it's not controlled by GC. |
| const int kApiStackSpace = 4; |
| |
| FrameScope frame_scope(masm, StackFrame::MANUAL); |
| __ EnterExitFrame(false, kApiStackSpace); |
| |
| // r0 = v8::Arguments& |
| // Arguments is after the return address. |
| __ add(r0, sp, Operand(1 * kPointerSize)); |
| // v8::Arguments::implicit_args_ |
| __ str(r2, MemOperand(r0, 0 * kPointerSize)); |
| // v8::Arguments::values_ |
| __ add(ip, r2, Operand(argc * kPointerSize)); |
| __ str(ip, MemOperand(r0, 1 * kPointerSize)); |
| // v8::Arguments::length_ = argc |
| __ mov(ip, Operand(argc)); |
| __ str(ip, MemOperand(r0, 2 * kPointerSize)); |
| // v8::Arguments::is_construct_call = 0 |
| __ mov(ip, Operand::Zero()); |
| __ str(ip, MemOperand(r0, 3 * kPointerSize)); |
| |
| const int kStackUnwindSpace = argc + kFastApiCallArguments + 1; |
| Address function_address = v8::ToCData<Address>(api_call_info->callback()); |
| ApiFunction fun(function_address); |
| ExternalReference ref = ExternalReference(&fun, |
| ExternalReference::DIRECT_API_CALL, |
| masm->isolate()); |
| AllowExternalCallThatCantCauseGC scope(masm); |
| |
| __ CallApiFunctionAndReturn(ref, kStackUnwindSpace); |
| } |
| |
| |
| class CallInterceptorCompiler BASE_EMBEDDED { |
| public: |
| CallInterceptorCompiler(StubCompiler* stub_compiler, |
| const ParameterCount& arguments, |
| Register name, |
| Code::ExtraICState extra_ic_state) |
| : stub_compiler_(stub_compiler), |
| arguments_(arguments), |
| name_(name), |
| extra_ic_state_(extra_ic_state) {} |
| |
| void Compile(MacroAssembler* masm, |
| Handle<JSObject> object, |
| Handle<JSObject> holder, |
| Handle<String> name, |
| LookupResult* lookup, |
| Register receiver, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| Label* miss) { |
| ASSERT(holder->HasNamedInterceptor()); |
| ASSERT(!holder->GetNamedInterceptor()->getter()->IsUndefined()); |
| |
| // Check that the receiver isn't a smi. |
| __ JumpIfSmi(receiver, miss); |
| CallOptimization optimization(lookup); |
| if (optimization.is_constant_call()) { |
| CompileCacheable(masm, object, receiver, scratch1, scratch2, scratch3, |
| holder, lookup, name, optimization, miss); |
| } else { |
| CompileRegular(masm, object, receiver, scratch1, scratch2, scratch3, |
| name, holder, miss); |
| } |
| } |
| |
| private: |
| void CompileCacheable(MacroAssembler* masm, |
| Handle<JSObject> object, |
| Register receiver, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| Handle<JSObject> interceptor_holder, |
| LookupResult* lookup, |
| Handle<String> name, |
| const CallOptimization& optimization, |
| Label* miss_label) { |
| ASSERT(optimization.is_constant_call()); |
| ASSERT(!lookup->holder()->IsGlobalObject()); |
| Counters* counters = masm->isolate()->counters(); |
| int depth1 = kInvalidProtoDepth; |
| int depth2 = kInvalidProtoDepth; |
| bool can_do_fast_api_call = false; |
| if (optimization.is_simple_api_call() && |
| !lookup->holder()->IsGlobalObject()) { |
| depth1 = optimization.GetPrototypeDepthOfExpectedType( |
| object, interceptor_holder); |
| if (depth1 == kInvalidProtoDepth) { |
| depth2 = optimization.GetPrototypeDepthOfExpectedType( |
| interceptor_holder, Handle<JSObject>(lookup->holder())); |
| } |
| can_do_fast_api_call = |
| depth1 != kInvalidProtoDepth || depth2 != kInvalidProtoDepth; |
| } |
| |
| __ IncrementCounter(counters->call_const_interceptor(), 1, |
| scratch1, scratch2); |
| |
| if (can_do_fast_api_call) { |
| __ IncrementCounter(counters->call_const_interceptor_fast_api(), 1, |
| scratch1, scratch2); |
| ReserveSpaceForFastApiCall(masm, scratch1); |
| } |
| |
| // Check that the maps from receiver to interceptor's holder |
| // haven't changed and thus we can invoke interceptor. |
| Label miss_cleanup; |
| Label* miss = can_do_fast_api_call ? &miss_cleanup : miss_label; |
| Register holder = |
| stub_compiler_->CheckPrototypes(object, receiver, interceptor_holder, |
| scratch1, scratch2, scratch3, |
| name, depth1, miss); |
| |
| // Invoke an interceptor and if it provides a value, |
| // branch to |regular_invoke|. |
| Label regular_invoke; |
| LoadWithInterceptor(masm, receiver, holder, interceptor_holder, scratch2, |
| ®ular_invoke); |
| |
| // Interceptor returned nothing for this property. Try to use cached |
| // constant function. |
| |
| // Check that the maps from interceptor's holder to constant function's |
| // holder haven't changed and thus we can use cached constant function. |
| if (*interceptor_holder != lookup->holder()) { |
| stub_compiler_->CheckPrototypes(interceptor_holder, receiver, |
| Handle<JSObject>(lookup->holder()), |
| scratch1, scratch2, scratch3, |
| name, depth2, miss); |
| } else { |
| // CheckPrototypes has a side effect of fetching a 'holder' |
| // for API (object which is instanceof for the signature). It's |
| // safe to omit it here, as if present, it should be fetched |
| // by the previous CheckPrototypes. |
| ASSERT(depth2 == kInvalidProtoDepth); |
| } |
| |
| // Invoke function. |
| if (can_do_fast_api_call) { |
| GenerateFastApiDirectCall(masm, optimization, arguments_.immediate()); |
| } else { |
| CallKind call_kind = CallICBase::Contextual::decode(extra_ic_state_) |
| ? CALL_AS_FUNCTION |
| : CALL_AS_METHOD; |
| __ InvokeFunction(optimization.constant_function(), arguments_, |
| JUMP_FUNCTION, NullCallWrapper(), call_kind); |
| } |
| |
| // Deferred code for fast API call case---clean preallocated space. |
| if (can_do_fast_api_call) { |
| __ bind(&miss_cleanup); |
| FreeSpaceForFastApiCall(masm); |
| __ b(miss_label); |
| } |
| |
| // Invoke a regular function. |
| __ bind(®ular_invoke); |
| if (can_do_fast_api_call) { |
| FreeSpaceForFastApiCall(masm); |
| } |
| } |
| |
| void CompileRegular(MacroAssembler* masm, |
| Handle<JSObject> object, |
| Register receiver, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| Handle<String> name, |
| Handle<JSObject> interceptor_holder, |
| Label* miss_label) { |
| Register holder = |
| stub_compiler_->CheckPrototypes(object, receiver, interceptor_holder, |
| scratch1, scratch2, scratch3, |
| name, miss_label); |
| |
| // Call a runtime function to load the interceptor property. |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| // Save the name_ register across the call. |
| __ push(name_); |
| PushInterceptorArguments(masm, receiver, holder, name_, interceptor_holder); |
| __ CallExternalReference( |
| ExternalReference(IC_Utility(IC::kLoadPropertyWithInterceptorForCall), |
| masm->isolate()), |
| 6); |
| // Restore the name_ register. |
| __ pop(name_); |
| // Leave the internal frame. |
| } |
| |
| void LoadWithInterceptor(MacroAssembler* masm, |
| Register receiver, |
| Register holder, |
| Handle<JSObject> holder_obj, |
| Register scratch, |
| Label* interceptor_succeeded) { |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ Push(holder, name_); |
| CompileCallLoadPropertyWithInterceptor(masm, |
| receiver, |
| holder, |
| name_, |
| holder_obj); |
| __ pop(name_); // Restore the name. |
| __ pop(receiver); // Restore the holder. |
| } |
| // If interceptor returns no-result sentinel, call the constant function. |
| __ LoadRoot(scratch, Heap::kNoInterceptorResultSentinelRootIndex); |
| __ cmp(r0, scratch); |
| __ b(ne, interceptor_succeeded); |
| } |
| |
| StubCompiler* stub_compiler_; |
| const ParameterCount& arguments_; |
| Register name_; |
| Code::ExtraICState extra_ic_state_; |
| }; |
| |
| |
| // Generate code to check that a global property cell is empty. Create |
| // the property cell at compilation time if no cell exists for the |
| // property. |
| static void GenerateCheckPropertyCell(MacroAssembler* masm, |
| Handle<GlobalObject> global, |
| Handle<String> name, |
| Register scratch, |
| Label* miss) { |
| Handle<JSGlobalPropertyCell> cell = |
| GlobalObject::EnsurePropertyCell(global, name); |
| ASSERT(cell->value()->IsTheHole()); |
| __ mov(scratch, Operand(cell)); |
| __ ldr(scratch, |
| FieldMemOperand(scratch, JSGlobalPropertyCell::kValueOffset)); |
| __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| __ cmp(scratch, ip); |
| __ b(ne, miss); |
| } |
| |
| |
| // Calls GenerateCheckPropertyCell for each global object in the prototype chain |
| // from object to (but not including) holder. |
| static void GenerateCheckPropertyCells(MacroAssembler* masm, |
| Handle<JSObject> object, |
| Handle<JSObject> holder, |
| Handle<String> name, |
| Register scratch, |
| Label* miss) { |
| Handle<JSObject> current = object; |
| while (!current.is_identical_to(holder)) { |
| if (current->IsGlobalObject()) { |
| GenerateCheckPropertyCell(masm, |
| Handle<GlobalObject>::cast(current), |
| name, |
| scratch, |
| miss); |
| } |
| current = Handle<JSObject>(JSObject::cast(current->GetPrototype())); |
| } |
| } |
| |
| |
| // Convert and store int passed in register ival to IEEE 754 single precision |
| // floating point value at memory location (dst + 4 * wordoffset) |
| // If VFP3 is available use it for conversion. |
| static void StoreIntAsFloat(MacroAssembler* masm, |
| Register dst, |
| Register wordoffset, |
| Register ival, |
| Register fval, |
| Register scratch1, |
| Register scratch2) { |
| if (CpuFeatures::IsSupported(VFP2)) { |
| CpuFeatures::Scope scope(VFP2); |
| __ vmov(s0, ival); |
| __ add(scratch1, dst, Operand(wordoffset, LSL, 2)); |
| __ vcvt_f32_s32(s0, s0); |
| __ vstr(s0, scratch1, 0); |
| } else { |
| Label not_special, done; |
| // Move sign bit from source to destination. This works because the sign |
| // bit in the exponent word of the double has the same position and polarity |
| // as the 2's complement sign bit in a Smi. |
| ASSERT(kBinary32SignMask == 0x80000000u); |
| |
| __ and_(fval, ival, Operand(kBinary32SignMask), SetCC); |
| // Negate value if it is negative. |
| __ rsb(ival, ival, Operand::Zero(), LeaveCC, ne); |
| |
| // We have -1, 0 or 1, which we treat specially. Register ival contains |
| // absolute value: it is either equal to 1 (special case of -1 and 1), |
| // greater than 1 (not a special case) or less than 1 (special case of 0). |
| __ cmp(ival, Operand(1)); |
| __ b(gt, ¬_special); |
| |
| // For 1 or -1 we need to or in the 0 exponent (biased). |
| static const uint32_t exponent_word_for_1 = |
| kBinary32ExponentBias << kBinary32ExponentShift; |
| |
| __ orr(fval, fval, Operand(exponent_word_for_1), LeaveCC, eq); |
| __ b(&done); |
| |
| __ bind(¬_special); |
| // Count leading zeros. |
| // Gets the wrong answer for 0, but we already checked for that case above. |
| Register zeros = scratch2; |
| __ CountLeadingZeros(zeros, ival, scratch1); |
| |
| // Compute exponent and or it into the exponent register. |
| __ rsb(scratch1, |
| zeros, |
| Operand((kBitsPerInt - 1) + kBinary32ExponentBias)); |
| |
| __ orr(fval, |
| fval, |
| Operand(scratch1, LSL, kBinary32ExponentShift)); |
| |
| // Shift up the source chopping the top bit off. |
| __ add(zeros, zeros, Operand(1)); |
| // This wouldn't work for 1 and -1 as the shift would be 32 which means 0. |
| __ mov(ival, Operand(ival, LSL, zeros)); |
| // And the top (top 20 bits). |
| __ orr(fval, |
| fval, |
| Operand(ival, LSR, kBitsPerInt - kBinary32MantissaBits)); |
| |
| __ bind(&done); |
| __ str(fval, MemOperand(dst, wordoffset, LSL, 2)); |
| } |
| } |
| |
| |
| #undef __ |
| #define __ ACCESS_MASM(masm()) |
| |
| |
| Register StubCompiler::CheckPrototypes(Handle<JSObject> object, |
| Register object_reg, |
| Handle<JSObject> holder, |
| Register holder_reg, |
| Register scratch1, |
| Register scratch2, |
| Handle<String> name, |
| int save_at_depth, |
| Label* miss) { |
| // Make sure there's no overlap between holder and object registers. |
| ASSERT(!scratch1.is(object_reg) && !scratch1.is(holder_reg)); |
| ASSERT(!scratch2.is(object_reg) && !scratch2.is(holder_reg) |
| && !scratch2.is(scratch1)); |
| |
| // Keep track of the current object in register reg. |
| Register reg = object_reg; |
| int depth = 0; |
| |
| if (save_at_depth == depth) { |
| __ str(reg, MemOperand(sp)); |
| } |
| |
| // Check the maps in the prototype chain. |
| // Traverse the prototype chain from the object and do map checks. |
| Handle<JSObject> current = object; |
| while (!current.is_identical_to(holder)) { |
| ++depth; |
| |
| // Only global objects and objects that do not require access |
| // checks are allowed in stubs. |
| ASSERT(current->IsJSGlobalProxy() || !current->IsAccessCheckNeeded()); |
| |
| Handle<JSObject> prototype(JSObject::cast(current->GetPrototype())); |
| if (!current->HasFastProperties() && |
| !current->IsJSGlobalObject() && |
| !current->IsJSGlobalProxy()) { |
| if (!name->IsSymbol()) { |
| name = factory()->LookupSymbol(name); |
| } |
| ASSERT(current->property_dictionary()->FindEntry(*name) == |
| StringDictionary::kNotFound); |
| |
| GenerateDictionaryNegativeLookup(masm(), miss, reg, name, |
| scratch1, scratch2); |
| |
| __ ldr(scratch1, FieldMemOperand(reg, HeapObject::kMapOffset)); |
| reg = holder_reg; // From now on the object will be in holder_reg. |
| __ ldr(reg, FieldMemOperand(scratch1, Map::kPrototypeOffset)); |
| } else { |
| Handle<Map> current_map(current->map()); |
| __ CheckMap(reg, scratch1, current_map, miss, DONT_DO_SMI_CHECK, |
| ALLOW_ELEMENT_TRANSITION_MAPS); |
| |
| // Check access rights to the global object. This has to happen after |
| // the map check so that we know that the object is actually a global |
| // object. |
| if (current->IsJSGlobalProxy()) { |
| __ CheckAccessGlobalProxy(reg, scratch2, miss); |
| } |
| reg = holder_reg; // From now on the object will be in holder_reg. |
| |
| if (heap()->InNewSpace(*prototype)) { |
| // The prototype is in new space; we cannot store a reference to it |
| // in the code. Load it from the map. |
| __ ldr(reg, FieldMemOperand(scratch1, Map::kPrototypeOffset)); |
| } else { |
| // The prototype is in old space; load it directly. |
| __ mov(reg, Operand(prototype)); |
| } |
| } |
| |
| if (save_at_depth == depth) { |
| __ str(reg, MemOperand(sp)); |
| } |
| |
| // Go to the next object in the prototype chain. |
| current = prototype; |
| } |
| |
| // Log the check depth. |
| LOG(masm()->isolate(), IntEvent("check-maps-depth", depth + 1)); |
| |
| // Check the holder map. |
| __ CheckMap(reg, scratch1, Handle<Map>(current->map()), miss, |
| DONT_DO_SMI_CHECK, ALLOW_ELEMENT_TRANSITION_MAPS); |
| |
| // Perform security check for access to the global object. |
| ASSERT(holder->IsJSGlobalProxy() || !holder->IsAccessCheckNeeded()); |
| if (holder->IsJSGlobalProxy()) { |
| __ CheckAccessGlobalProxy(reg, scratch1, miss); |
| } |
| |
| // If we've skipped any global objects, it's not enough to verify that |
| // their maps haven't changed. We also need to check that the property |
| // cell for the property is still empty. |
| GenerateCheckPropertyCells(masm(), object, holder, name, scratch1, miss); |
| |
| // Return the register containing the holder. |
| return reg; |
| } |
| |
| |
| void StubCompiler::GenerateLoadField(Handle<JSObject> object, |
| Handle<JSObject> holder, |
| Register receiver, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| PropertyIndex index, |
| Handle<String> name, |
| Label* miss) { |
| // Check that the receiver isn't a smi. |
| __ JumpIfSmi(receiver, miss); |
| |
| // Check that the maps haven't changed. |
| Register reg = CheckPrototypes( |
| object, receiver, holder, scratch1, scratch2, scratch3, name, miss); |
| GenerateFastPropertyLoad(masm(), r0, reg, holder, index); |
| __ Ret(); |
| } |
| |
| |
| void StubCompiler::GenerateLoadConstant(Handle<JSObject> object, |
| Handle<JSObject> holder, |
| Register receiver, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| Handle<JSFunction> value, |
| Handle<String> name, |
| Label* miss) { |
| // Check that the receiver isn't a smi. |
| __ JumpIfSmi(receiver, miss); |
| |
| // Check that the maps haven't changed. |
| CheckPrototypes( |
| object, receiver, holder, scratch1, scratch2, scratch3, name, miss); |
| |
| // Return the constant value. |
| __ LoadHeapObject(r0, value); |
| __ Ret(); |
| } |
| |
| |
| void StubCompiler::GenerateDictionaryLoadCallback(Register receiver, |
| Register name_reg, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| Handle<AccessorInfo> callback, |
| Handle<String> name, |
| Label* miss) { |
| ASSERT(!receiver.is(scratch1)); |
| ASSERT(!receiver.is(scratch2)); |
| ASSERT(!receiver.is(scratch3)); |
| |
| // Load the properties dictionary. |
| Register dictionary = scratch1; |
| __ ldr(dictionary, FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
| |
| // Probe the dictionary. |
| Label probe_done; |
| StringDictionaryLookupStub::GeneratePositiveLookup(masm(), |
| miss, |
| &probe_done, |
| dictionary, |
| name_reg, |
| scratch2, |
| scratch3); |
| __ bind(&probe_done); |
| |
| // If probing finds an entry in the dictionary, scratch3 contains the |
| // pointer into the dictionary. Check that the value is the callback. |
| Register pointer = scratch3; |
| const int kElementsStartOffset = StringDictionary::kHeaderSize + |
| StringDictionary::kElementsStartIndex * kPointerSize; |
| const int kValueOffset = kElementsStartOffset + kPointerSize; |
| __ ldr(scratch2, FieldMemOperand(pointer, kValueOffset)); |
| __ cmp(scratch2, Operand(callback)); |
| __ b(ne, miss); |
| } |
| |
| |
| void StubCompiler::GenerateLoadCallback(Handle<JSObject> object, |
| Handle<JSObject> holder, |
| Register receiver, |
| Register name_reg, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| Register scratch4, |
| Handle<AccessorInfo> callback, |
| Handle<String> name, |
| Label* miss) { |
| // Check that the receiver isn't a smi. |
| __ JumpIfSmi(receiver, miss); |
| |
| // Check that the maps haven't changed. |
| Register reg = CheckPrototypes(object, receiver, holder, scratch1, |
| scratch2, scratch3, name, miss); |
| |
| if (!holder->HasFastProperties() && !holder->IsJSGlobalObject()) { |
| GenerateDictionaryLoadCallback( |
| reg, name_reg, scratch2, scratch3, scratch4, callback, name, miss); |
| } |
| |
| // Build AccessorInfo::args_ list on the stack and push property name below |
| // the exit frame to make GC aware of them and store pointers to them. |
| __ push(receiver); |
| __ mov(scratch2, sp); // scratch2 = AccessorInfo::args_ |
| if (heap()->InNewSpace(callback->data())) { |
| __ Move(scratch3, callback); |
| __ ldr(scratch3, FieldMemOperand(scratch3, AccessorInfo::kDataOffset)); |
| } else { |
| __ Move(scratch3, Handle<Object>(callback->data())); |
| } |
| __ Push(reg, scratch3); |
| __ mov(scratch3, Operand(ExternalReference::isolate_address())); |
| __ Push(scratch3, name_reg); |
| __ mov(r0, sp); // r0 = Handle<String> |
| |
| const int kApiStackSpace = 1; |
| FrameScope frame_scope(masm(), StackFrame::MANUAL); |
| __ EnterExitFrame(false, kApiStackSpace); |
| |
| // Create AccessorInfo instance on the stack above the exit frame with |
| // scratch2 (internal::Object** args_) as the data. |
| __ str(scratch2, MemOperand(sp, 1 * kPointerSize)); |
| __ add(r1, sp, Operand(1 * kPointerSize)); // r1 = AccessorInfo& |
| |
| const int kStackUnwindSpace = 5; |
| Address getter_address = v8::ToCData<Address>(callback->getter()); |
| ApiFunction fun(getter_address); |
| ExternalReference ref = |
| ExternalReference(&fun, |
| ExternalReference::DIRECT_GETTER_CALL, |
| masm()->isolate()); |
| __ CallApiFunctionAndReturn(ref, kStackUnwindSpace); |
| } |
| |
| |
| void StubCompiler::GenerateLoadInterceptor(Handle<JSObject> object, |
| Handle<JSObject> interceptor_holder, |
| LookupResult* lookup, |
| Register receiver, |
| Register name_reg, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| Handle<String> name, |
| Label* miss) { |
| ASSERT(interceptor_holder->HasNamedInterceptor()); |
| ASSERT(!interceptor_holder->GetNamedInterceptor()->getter()->IsUndefined()); |
| |
| // Check that the receiver isn't a smi. |
| __ JumpIfSmi(receiver, miss); |
| |
| // So far the most popular follow ups for interceptor loads are FIELD |
| // and CALLBACKS, so inline only them, other cases may be added |
| // later. |
| bool compile_followup_inline = false; |
| if (lookup->IsFound() && lookup->IsCacheable()) { |
| if (lookup->IsField()) { |
| compile_followup_inline = true; |
| } else if (lookup->type() == CALLBACKS && |
| lookup->GetCallbackObject()->IsAccessorInfo()) { |
| AccessorInfo* callback = AccessorInfo::cast(lookup->GetCallbackObject()); |
| compile_followup_inline = callback->getter() != NULL && |
| callback->IsCompatibleReceiver(*object); |
| } |
| } |
| |
| if (compile_followup_inline) { |
| // Compile the interceptor call, followed by inline code to load the |
| // property from further up the prototype chain if the call fails. |
| // Check that the maps haven't changed. |
| Register holder_reg = CheckPrototypes(object, receiver, interceptor_holder, |
| scratch1, scratch2, scratch3, |
| name, miss); |
| ASSERT(holder_reg.is(receiver) || holder_reg.is(scratch1)); |
| |
| // Preserve the receiver register explicitly whenever it is different from |
| // the holder and it is needed should the interceptor return without any |
| // result. The CALLBACKS case needs the receiver to be passed into C++ code, |
| // the FIELD case might cause a miss during the prototype check. |
| bool must_perfrom_prototype_check = *interceptor_holder != lookup->holder(); |
| bool must_preserve_receiver_reg = !receiver.is(holder_reg) && |
| (lookup->type() == CALLBACKS || must_perfrom_prototype_check); |
| |
| // Save necessary data before invoking an interceptor. |
| // Requires a frame to make GC aware of pushed pointers. |
| { |
| FrameScope frame_scope(masm(), StackFrame::INTERNAL); |
| if (must_preserve_receiver_reg) { |
| __ Push(receiver, holder_reg, name_reg); |
| } else { |
| __ Push(holder_reg, name_reg); |
| } |
| // Invoke an interceptor. Note: map checks from receiver to |
| // interceptor's holder has been compiled before (see a caller |
| // of this method.) |
| CompileCallLoadPropertyWithInterceptor(masm(), |
| receiver, |
| holder_reg, |
| name_reg, |
| interceptor_holder); |
| // Check if interceptor provided a value for property. If it's |
| // the case, return immediately. |
| Label interceptor_failed; |
| __ LoadRoot(scratch1, Heap::kNoInterceptorResultSentinelRootIndex); |
| __ cmp(r0, scratch1); |
| __ b(eq, &interceptor_failed); |
| frame_scope.GenerateLeaveFrame(); |
| __ Ret(); |
| |
| __ bind(&interceptor_failed); |
| __ pop(name_reg); |
| __ pop(holder_reg); |
| if (must_preserve_receiver_reg) { |
| __ pop(receiver); |
| } |
| // Leave the internal frame. |
| } |
| // Check that the maps from interceptor's holder to lookup's holder |
| // haven't changed. And load lookup's holder into |holder| register. |
| if (must_perfrom_prototype_check) { |
| holder_reg = CheckPrototypes(interceptor_holder, |
| holder_reg, |
| Handle<JSObject>(lookup->holder()), |
| scratch1, |
| scratch2, |
| scratch3, |
| name, |
| miss); |
| } |
| |
| if (lookup->IsField()) { |
| // We found FIELD property in prototype chain of interceptor's holder. |
| // Retrieve a field from field's holder. |
| GenerateFastPropertyLoad(masm(), r0, holder_reg, |
| Handle<JSObject>(lookup->holder()), |
| lookup->GetFieldIndex()); |
| __ Ret(); |
| } else { |
| // We found CALLBACKS property in prototype chain of interceptor's |
| // holder. |
| ASSERT(lookup->type() == CALLBACKS); |
| Handle<AccessorInfo> callback( |
| AccessorInfo::cast(lookup->GetCallbackObject())); |
| ASSERT(callback->getter() != NULL); |
| |
| // Tail call to runtime. |
| // Important invariant in CALLBACKS case: the code above must be |
| // structured to never clobber |receiver| register. |
| __ Move(scratch2, callback); |
| // holder_reg is either receiver or scratch1. |
| if (!receiver.is(holder_reg)) { |
| ASSERT(scratch1.is(holder_reg)); |
| __ Push(receiver, holder_reg); |
| } else { |
| __ push(receiver); |
| __ push(holder_reg); |
| } |
| __ ldr(scratch3, |
| FieldMemOperand(scratch2, AccessorInfo::kDataOffset)); |
| __ mov(scratch1, Operand(ExternalReference::isolate_address())); |
| __ Push(scratch3, scratch1, scratch2, name_reg); |
| |
| ExternalReference ref = |
| ExternalReference(IC_Utility(IC::kLoadCallbackProperty), |
| masm()->isolate()); |
| __ TailCallExternalReference(ref, 6, 1); |
| } |
| } else { // !compile_followup_inline |
| // Call the runtime system to load the interceptor. |
| // Check that the maps haven't changed. |
| Register holder_reg = CheckPrototypes(object, receiver, interceptor_holder, |
| scratch1, scratch2, scratch3, |
| name, miss); |
| PushInterceptorArguments(masm(), receiver, holder_reg, |
| name_reg, interceptor_holder); |
| |
| ExternalReference ref = |
| ExternalReference(IC_Utility(IC::kLoadPropertyWithInterceptorForLoad), |
| masm()->isolate()); |
| __ TailCallExternalReference(ref, 6, 1); |
| } |
| } |
| |
| |
| void CallStubCompiler::GenerateNameCheck(Handle<String> name, Label* miss) { |
| if (kind_ == Code::KEYED_CALL_IC) { |
| __ cmp(r2, Operand(name)); |
| __ b(ne, miss); |
| } |
| } |
| |
| |
| void CallStubCompiler::GenerateGlobalReceiverCheck(Handle<JSObject> object, |
| Handle<JSObject> holder, |
| Handle<String> name, |
| Label* miss) { |
| ASSERT(holder->IsGlobalObject()); |
| |
| // Get the number of arguments. |
| const int argc = arguments().immediate(); |
| |
| // Get the receiver from the stack. |
| __ ldr(r0, MemOperand(sp, argc * kPointerSize)); |
| |
| // Check that the maps haven't changed. |
| __ JumpIfSmi(r0, miss); |
| CheckPrototypes(object, r0, holder, r3, r1, r4, name, miss); |
| } |
| |
| |
| void CallStubCompiler::GenerateLoadFunctionFromCell( |
| Handle<JSGlobalPropertyCell> cell, |
| Handle<JSFunction> function, |
| Label* miss) { |
| // Get the value from the cell. |
| __ mov(r3, Operand(cell)); |
| __ ldr(r1, FieldMemOperand(r3, JSGlobalPropertyCell::kValueOffset)); |
| |
| // Check that the cell contains the same function. |
| if (heap()->InNewSpace(*function)) { |
| // We can't embed a pointer to a function in new space so we have |
| // to verify that the shared function info is unchanged. This has |
| // the nice side effect that multiple closures based on the same |
| // function can all use this call IC. Before we load through the |
| // function, we have to verify that it still is a function. |
| __ JumpIfSmi(r1, miss); |
| __ CompareObjectType(r1, r3, r3, JS_FUNCTION_TYPE); |
| __ b(ne, miss); |
| |
| // Check the shared function info. Make sure it hasn't changed. |
| __ Move(r3, Handle<SharedFunctionInfo>(function->shared())); |
| __ ldr(r4, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| __ cmp(r4, r3); |
| } else { |
| __ cmp(r1, Operand(function)); |
| } |
| __ b(ne, miss); |
| } |
| |
| |
| void CallStubCompiler::GenerateMissBranch() { |
| Handle<Code> code = |
| isolate()->stub_cache()->ComputeCallMiss(arguments().immediate(), |
| kind_, |
| extra_state_); |
| __ Jump(code, RelocInfo::CODE_TARGET); |
| } |
| |
| |
| Handle<Code> CallStubCompiler::CompileCallField(Handle<JSObject> object, |
| Handle<JSObject> holder, |
| PropertyIndex index, |
| Handle<String> name) { |
| // ----------- S t a t e ------------- |
| // -- r2 : name |
| // -- lr : return address |
| // ----------------------------------- |
| Label miss; |
| |
| GenerateNameCheck(name, &miss); |
| |
| const int argc = arguments().immediate(); |
| |
| // Get the receiver of the function from the stack into r0. |
| __ ldr(r0, MemOperand(sp, argc * kPointerSize)); |
| // Check that the receiver isn't a smi. |
| __ JumpIfSmi(r0, &miss); |
| |
| // Do the right check and compute the holder register. |
| Register reg = CheckPrototypes(object, r0, holder, r1, r3, r4, name, &miss); |
| GenerateFastPropertyLoad(masm(), r1, reg, holder, index); |
| |
| GenerateCallFunction(masm(), object, arguments(), &miss, extra_state_); |
| |
| // Handle call cache miss. |
| __ bind(&miss); |
| GenerateMissBranch(); |
| |
| // Return the generated code. |
| return GetCode(Code::FIELD, name); |
| } |
| |
| |
| Handle<Code> CallStubCompiler::CompileArrayPushCall( |
| Handle<Object> object, |
| Handle<JSObject> holder, |
| Handle<JSGlobalPropertyCell> cell, |
| Handle<JSFunction> function, |
| Handle<String> name) { |
| // ----------- S t a t e ------------- |
| // -- r2 : name |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 4] : arg[n] (zero-based) |
| // -- ... |
| // -- sp[argc * 4] : receiver |
| // ----------------------------------- |
| |
| // If object is not an array, bail out to regular call. |
| if (!object->IsJSArray() || !cell.is_null()) return Handle<Code>::null(); |
| |
| Label miss; |
| GenerateNameCheck(name, &miss); |
| |
| Register receiver = r1; |
| // Get the receiver from the stack |
| const int argc = arguments().immediate(); |
| __ ldr(receiver, MemOperand(sp, argc * kPointerSize)); |
| |
| // Check that the receiver isn't a smi. |
| __ JumpIfSmi(receiver, &miss); |
| |
| // Check that the maps haven't changed. |
| CheckPrototypes(Handle<JSObject>::cast(object), receiver, holder, r3, r0, r4, |
| name, &miss); |
| |
| if (argc == 0) { |
| // Nothing to do, just return the length. |
| __ ldr(r0, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
| __ Drop(argc + 1); |
| __ Ret(); |
| } else { |
| Label call_builtin; |
| |
| if (argc == 1) { // Otherwise fall through to call the builtin. |
| Label attempt_to_grow_elements, with_write_barrier, check_double; |
| |
| Register elements = r6; |
| Register end_elements = r5; |
| // Get the elements array of the object. |
| __ ldr(elements, FieldMemOperand(receiver, JSArray::kElementsOffset)); |
| |
| // Check that the elements are in fast mode and writable. |
| __ CheckMap(elements, |
| r0, |
| Heap::kFixedArrayMapRootIndex, |
| &check_double, |
| DONT_DO_SMI_CHECK); |
| |
| // Get the array's length into r0 and calculate new length. |
| __ ldr(r0, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
| STATIC_ASSERT(kSmiTagSize == 1); |
| STATIC_ASSERT(kSmiTag == 0); |
| __ add(r0, r0, Operand(Smi::FromInt(argc))); |
| |
| // Get the elements' length. |
| __ ldr(r4, FieldMemOperand(elements, FixedArray::kLengthOffset)); |
| |
| // Check if we could survive without allocation. |
| __ cmp(r0, r4); |
| __ b(gt, &attempt_to_grow_elements); |
| |
| // Check if value is a smi. |
| __ ldr(r4, MemOperand(sp, (argc - 1) * kPointerSize)); |
| __ JumpIfNotSmi(r4, &with_write_barrier); |
| |
| // Save new length. |
| __ str(r0, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
| |
| // Store the value. |
| // We may need a register containing the address end_elements below, |
| // so write back the value in end_elements. |
| __ add(end_elements, elements, |
| Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| const int kEndElementsOffset = |
| FixedArray::kHeaderSize - kHeapObjectTag - argc * kPointerSize; |
| __ str(r4, MemOperand(end_elements, kEndElementsOffset, PreIndex)); |
| |
| // Check for a smi. |
| __ Drop(argc + 1); |
| __ Ret(); |
| |
| __ bind(&check_double); |
| |
| // Check that the elements are in fast mode and writable. |
| __ CheckMap(elements, |
| r0, |
| Heap::kFixedDoubleArrayMapRootIndex, |
| &call_builtin, |
| DONT_DO_SMI_CHECK); |
| |
| // Get the array's length into r0 and calculate new length. |
| __ ldr(r0, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
| STATIC_ASSERT(kSmiTagSize == 1); |
| STATIC_ASSERT(kSmiTag == 0); |
| __ add(r0, r0, Operand(Smi::FromInt(argc))); |
| |
| // Get the elements' length. |
| __ ldr(r4, FieldMemOperand(elements, FixedArray::kLengthOffset)); |
| |
| // Check if we could survive without allocation. |
| __ cmp(r0, r4); |
| __ b(gt, &call_builtin); |
| |
| __ ldr(r4, MemOperand(sp, (argc - 1) * kPointerSize)); |
| __ StoreNumberToDoubleElements( |
| r4, r0, elements, r3, r5, r2, r9, |
| &call_builtin, argc * kDoubleSize); |
| |
| // Save new length. |
| __ str(r0, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
| |
| // Check for a smi. |
| __ Drop(argc + 1); |
| __ Ret(); |
| |
| __ bind(&with_write_barrier); |
| |
| __ ldr(r3, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| |
| if (FLAG_smi_only_arrays && !FLAG_trace_elements_transitions) { |
| Label fast_object, not_fast_object; |
| __ CheckFastObjectElements(r3, r7, ¬_fast_object); |
| __ jmp(&fast_object); |
| // In case of fast smi-only, convert to fast object, otherwise bail out. |
| __ bind(¬_fast_object); |
| __ CheckFastSmiElements(r3, r7, &call_builtin); |
| |
| __ ldr(r7, FieldMemOperand(r4, HeapObject::kMapOffset)); |
| __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex); |
| __ cmp(r7, ip); |
| __ b(eq, &call_builtin); |
| // edx: receiver |
| // r3: map |
| Label try_holey_map; |
| __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS, |
| FAST_ELEMENTS, |
| r3, |
| r7, |
| &try_holey_map); |
| __ mov(r2, receiver); |
| ElementsTransitionGenerator:: |
| GenerateMapChangeElementsTransition(masm(), |
| DONT_TRACK_ALLOCATION_SITE, |
| NULL); |
| __ jmp(&fast_object); |
| |
| __ bind(&try_holey_map); |
| __ LoadTransitionedArrayMapConditional(FAST_HOLEY_SMI_ELEMENTS, |
| FAST_HOLEY_ELEMENTS, |
| r3, |
| r7, |
| &call_builtin); |
| __ mov(r2, receiver); |
| ElementsTransitionGenerator:: |
| GenerateMapChangeElementsTransition(masm(), |
| DONT_TRACK_ALLOCATION_SITE, |
| NULL); |
| __ bind(&fast_object); |
| } else { |
| __ CheckFastObjectElements(r3, r3, &call_builtin); |
| } |
| |
| // Save new length. |
| __ str(r0, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
| |
| // Store the value. |
| // We may need a register containing the address end_elements below, |
| // so write back the value in end_elements. |
| __ add(end_elements, elements, |
| Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| __ str(r4, MemOperand(end_elements, kEndElementsOffset, PreIndex)); |
| |
| __ RecordWrite(elements, |
| end_elements, |
| r4, |
| kLRHasNotBeenSaved, |
| kDontSaveFPRegs, |
| EMIT_REMEMBERED_SET, |
| OMIT_SMI_CHECK); |
| __ Drop(argc + 1); |
| __ Ret(); |
| |
| __ bind(&attempt_to_grow_elements); |
| // r0: array's length + 1. |
| // r4: elements' length. |
| |
| if (!FLAG_inline_new) { |
| __ b(&call_builtin); |
| } |
| |
| __ ldr(r2, MemOperand(sp, (argc - 1) * kPointerSize)); |
| // Growing elements that are SMI-only requires special handling in case |
| // the new element is non-Smi. For now, delegate to the builtin. |
| Label no_fast_elements_check; |
| __ JumpIfSmi(r2, &no_fast_elements_check); |
| __ ldr(r7, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| __ CheckFastObjectElements(r7, r7, &call_builtin); |
| __ bind(&no_fast_elements_check); |
| |
| Isolate* isolate = masm()->isolate(); |
| ExternalReference new_space_allocation_top = |
| ExternalReference::new_space_allocation_top_address(isolate); |
| ExternalReference new_space_allocation_limit = |
| ExternalReference::new_space_allocation_limit_address(isolate); |
| |
| const int kAllocationDelta = 4; |
| // Load top and check if it is the end of elements. |
| __ add(end_elements, elements, |
| Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| __ add(end_elements, end_elements, Operand(kEndElementsOffset)); |
| __ mov(r7, Operand(new_space_allocation_top)); |
| __ ldr(r3, MemOperand(r7)); |
| __ cmp(end_elements, r3); |
| __ b(ne, &call_builtin); |
| |
| __ mov(r9, Operand(new_space_allocation_limit)); |
| __ ldr(r9, MemOperand(r9)); |
| __ add(r3, r3, Operand(kAllocationDelta * kPointerSize)); |
| __ cmp(r3, r9); |
| __ b(hi, &call_builtin); |
| |
| // We fit and could grow elements. |
| // Update new_space_allocation_top. |
| __ str(r3, MemOperand(r7)); |
| // Push the argument. |
| __ str(r2, MemOperand(end_elements)); |
| // Fill the rest with holes. |
| __ LoadRoot(r3, Heap::kTheHoleValueRootIndex); |
| for (int i = 1; i < kAllocationDelta; i++) { |
| __ str(r3, MemOperand(end_elements, i * kPointerSize)); |
| } |
| |
| // Update elements' and array's sizes. |
| __ str(r0, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
| __ add(r4, r4, Operand(Smi::FromInt(kAllocationDelta))); |
| __ str(r4, FieldMemOperand(elements, FixedArray::kLengthOffset)); |
| |
| // Elements are in new space, so write barrier is not required. |
| __ Drop(argc + 1); |
| __ Ret(); |
| } |
| __ bind(&call_builtin); |
| __ TailCallExternalReference(ExternalReference(Builtins::c_ArrayPush, |
| masm()->isolate()), |
| argc + 1, |
| 1); |
| } |
| |
| // Handle call cache miss. |
| __ bind(&miss); |
| GenerateMissBranch(); |
| |
| // Return the generated code. |
| return GetCode(function); |
| } |
| |
| |
| Handle<Code> CallStubCompiler::CompileArrayPopCall( |
| Handle<Object> object, |
| Handle<JSObject> holder, |
| Handle<JSGlobalPropertyCell> cell, |
| Handle<JSFunction> function, |
| Handle<String> name) { |
| // ----------- S t a t e ------------- |
| // -- r2 : name |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 4] : arg[n] (zero-based) |
| // -- ... |
| // -- sp[argc * 4] : receiver |
| // ----------------------------------- |
| |
| // If object is not an array, bail out to regular call. |
| if (!object->IsJSArray() || !cell.is_null()) return Handle<Code>::null(); |
| |
| Label miss, return_undefined, call_builtin; |
| Register receiver = r1; |
| Register elements = r3; |
| GenerateNameCheck(name, &miss); |
| |
| // Get the receiver from the stack |
| const int argc = arguments().immediate(); |
| __ ldr(receiver, MemOperand(sp, argc * kPointerSize)); |
| // Check that the receiver isn't a smi. |
| __ JumpIfSmi(receiver, &miss); |
| |
| // Check that the maps haven't changed. |
| CheckPrototypes(Handle<JSObject>::cast(object), receiver, holder, elements, |
| r4, r0, name, &miss); |
| |
| // Get the elements array of the object. |
| __ ldr(elements, FieldMemOperand(receiver, JSArray::kElementsOffset)); |
| |
| // Check that the elements are in fast mode and writable. |
| __ CheckMap(elements, |
| r0, |
| Heap::kFixedArrayMapRootIndex, |
| &call_builtin, |
| DONT_DO_SMI_CHECK); |
| |
| // Get the array's length into r4 and calculate new length. |
| __ ldr(r4, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
| __ sub(r4, r4, Operand(Smi::FromInt(1)), SetCC); |
| __ b(lt, &return_undefined); |
| |
| // Get the last element. |
| __ LoadRoot(r6, Heap::kTheHoleValueRootIndex); |
| STATIC_ASSERT(kSmiTagSize == 1); |
| STATIC_ASSERT(kSmiTag == 0); |
| // We can't address the last element in one operation. Compute the more |
| // expensive shift first, and use an offset later on. |
| __ add(elements, elements, Operand(r4, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| __ ldr(r0, FieldMemOperand(elements, FixedArray::kHeaderSize)); |
| __ cmp(r0, r6); |
| __ b(eq, &call_builtin); |
| |
| // Set the array's length. |
| __ str(r4, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
| |
| // Fill with the hole. |
| __ str(r6, FieldMemOperand(elements, FixedArray::kHeaderSize)); |
| __ Drop(argc + 1); |
| __ Ret(); |
| |
| __ bind(&return_undefined); |
| __ LoadRoot(r0, Heap::kUndefinedValueRootIndex); |
| __ Drop(argc + 1); |
| __ Ret(); |
| |
| __ bind(&call_builtin); |
| __ TailCallExternalReference(ExternalReference(Builtins::c_ArrayPop, |
| masm()->isolate()), |
| argc + 1, |
| 1); |
| |
| // Handle call cache miss. |
| __ bind(&miss); |
| GenerateMissBranch(); |
| |
| // Return the generated code. |
| return GetCode(function); |
| } |
| |
| |
| Handle<Code> CallStubCompiler::CompileStringCharCodeAtCall( |
| Handle<Object> object, |
| Handle<JSObject> holder, |
| Handle<JSGlobalPropertyCell> cell, |
| Handle<JSFunction> function, |
| Handle<String> name) { |
| // ----------- S t a t e ------------- |
| // -- r2 : function name |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 4] : arg[n] (zero-based) |
| // -- ... |
| // -- sp[argc * 4] : receiver |
| // ----------------------------------- |
| |
| // If object is not a string, bail out to regular call. |
| if (!object->IsString() || !cell.is_null()) return Handle<Code>::null(); |
| |
| const int argc = arguments().immediate(); |
| Label miss; |
| Label name_miss; |
| Label index_out_of_range; |
| Label* index_out_of_range_label = &index_out_of_range; |
| |
| if (kind_ == Code::CALL_IC && |
| (CallICBase::StringStubState::decode(extra_state_) == |
| DEFAULT_STRING_STUB)) { |
| index_out_of_range_label = &miss; |
| } |
| GenerateNameCheck(name, &name_miss); |
| |
| // Check that the maps starting from the prototype haven't changed. |
| GenerateDirectLoadGlobalFunctionPrototype(masm(), |
| Context::STRING_FUNCTION_INDEX, |
| r0, |
| &miss); |
| ASSERT(!object.is_identical_to(holder)); |
| CheckPrototypes(Handle<JSObject>(JSObject::cast(object->GetPrototype())), |
| r0, holder, r1, r3, r4, name, &miss); |
| |
| Register receiver = r1; |
| Register index = r4; |
| Register result = r0; |
| __ ldr(receiver, MemOperand(sp, argc * kPointerSize)); |
| if (argc > 0) { |
| __ ldr(index, MemOperand(sp, (argc - 1) * kPointerSize)); |
| } else { |
| __ LoadRoot(index, Heap::kUndefinedValueRootIndex); |
| } |
| |
| StringCharCodeAtGenerator generator(receiver, |
| index, |
| result, |
| &miss, // When not a string. |
| &miss, // When not a number. |
| index_out_of_range_label, |
| STRING_INDEX_IS_NUMBER); |
| generator.GenerateFast(masm()); |
| __ Drop(argc + 1); |
| __ Ret(); |
| |
| StubRuntimeCallHelper call_helper; |
| generator.GenerateSlow(masm(), call_helper); |
| |
| if (index_out_of_range.is_linked()) { |
| __ bind(&index_out_of_range); |
| __ LoadRoot(r0, Heap::kNanValueRootIndex); |
| __ Drop(argc + 1); |
| __ Ret(); |
| } |
| |
| __ bind(&miss); |
| // Restore function name in r2. |
| __ Move(r2, name); |
| __ bind(&name_miss); |
| GenerateMissBranch(); |
| |
| // Return the generated code. |
| return GetCode(function); |
| } |
| |
| |
| Handle<Code> CallStubCompiler::CompileStringCharAtCall( |
| Handle<Object> object, |
| Handle<JSObject> holder, |
| Handle<JSGlobalPropertyCell> cell, |
| Handle<JSFunction> function, |
| Handle<String> name) { |
| // ----------- S t a t e ------------- |
| // -- r2 : function name |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 4] : arg[n] (zero-based) |
| // -- ... |
| // -- sp[argc * 4] : receiver |
| // ----------------------------------- |
| |
| // If object is not a string, bail out to regular call. |
| if (!object->IsString() || !cell.is_null()) return Handle<Code>::null(); |
| |
| const int argc = arguments().immediate(); |
| Label miss; |
| Label name_miss; |
| Label index_out_of_range; |
| Label* index_out_of_range_label = &index_out_of_range; |
| if (kind_ == Code::CALL_IC && |
| (CallICBase::StringStubState::decode(extra_state_) == |
| DEFAULT_STRING_STUB)) { |
| index_out_of_range_label = &miss; |
| } |
| GenerateNameCheck(name, &name_miss); |
| |
| // Check that the maps starting from the prototype haven't changed. |
| GenerateDirectLoadGlobalFunctionPrototype(masm(), |
| Context::STRING_FUNCTION_INDEX, |
| r0, |
| &miss); |
| ASSERT(!object.is_identical_to(holder)); |
| CheckPrototypes(Handle<JSObject>(JSObject::cast(object->GetPrototype())), |
| r0, holder, r1, r3, r4, name, &miss); |
| |
| Register receiver = r0; |
| Register index = r4; |
| Register scratch = r3; |
| Register result = r0; |
| __ ldr(receiver, MemOperand(sp, argc * kPointerSize)); |
| if (argc > 0) { |
| __ ldr(index, MemOperand(sp, (argc - 1) * kPointerSize)); |
| } else { |
| __ LoadRoot(index, Heap::kUndefinedValueRootIndex); |
| } |
| |
| StringCharAtGenerator generator(receiver, |
| index, |
| scratch, |
| result, |
| &miss, // When not a string. |
| &miss, // When not a number. |
| index_out_of_range_label, |
| STRING_INDEX_IS_NUMBER); |
| generator.GenerateFast(masm()); |
| __ Drop(argc + 1); |
| __ Ret(); |
| |
| StubRuntimeCallHelper call_helper; |
| generator.GenerateSlow(masm(), call_helper); |
| |
| if (index_out_of_range.is_linked()) { |
| __ bind(&index_out_of_range); |
| __ LoadRoot(r0, Heap::kEmptyStringRootIndex); |
| __ Drop(argc + 1); |
| __ Ret(); |
| } |
| |
| __ bind(&miss); |
| // Restore function name in r2. |
| __ Move(r2, name); |
| __ bind(&name_miss); |
| GenerateMissBranch(); |
| |
| // Return the generated code. |
| return GetCode(function); |
| } |
| |
| |
| Handle<Code> CallStubCompiler::CompileStringFromCharCodeCall( |
| Handle<Object> object, |
| Handle<JSObject> holder, |
| Handle<JSGlobalPropertyCell> cell, |
| Handle<JSFunction> function, |
| Handle<String> name) { |
| // ----------- S t a t e ------------- |
| // -- r2 : function name |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 4] : arg[n] (zero-based) |
| // -- ... |
| // -- sp[argc * 4] : receiver |
| // ----------------------------------- |
| |
| const int argc = arguments().immediate(); |
| |
| // If the object is not a JSObject or we got an unexpected number of |
| // arguments, bail out to the regular call. |
| if (!object->IsJSObject() || argc != 1) return Handle<Code>::null(); |
| |
| Label miss; |
| GenerateNameCheck(name, &miss); |
| |
| if (cell.is_null()) { |
| __ ldr(r1, MemOperand(sp, 1 * kPointerSize)); |
| |
| STATIC_ASSERT(kSmiTag == 0); |
| __ JumpIfSmi(r1, &miss); |
| |
| CheckPrototypes(Handle<JSObject>::cast(object), r1, holder, r0, r3, r4, |
| name, &miss); |
| } else { |
| ASSERT(cell->value() == *function); |
| GenerateGlobalReceiverCheck(Handle<JSObject>::cast(object), holder, name, |
| &miss); |
| GenerateLoadFunctionFromCell(cell, function, &miss); |
| } |
| |
| // Load the char code argument. |
| Register code = r1; |
| __ ldr(code, MemOperand(sp, 0 * kPointerSize)); |
| |
| // Check the code is a smi. |
| Label slow; |
| STATIC_ASSERT(kSmiTag == 0); |
| __ JumpIfNotSmi(code, &slow); |
| |
| // Convert the smi code to uint16. |
| __ and_(code, code, Operand(Smi::FromInt(0xffff))); |
| |
| StringCharFromCodeGenerator generator(code, r0); |
| generator.GenerateFast(masm()); |
| __ Drop(argc + 1); |
| __ Ret(); |
| |
| StubRuntimeCallHelper call_helper; |
| generator.GenerateSlow(masm(), call_helper); |
| |
| // Tail call the full function. We do not have to patch the receiver |
| // because the function makes no use of it. |
| __ bind(&slow); |
| __ InvokeFunction( |
| function, arguments(), JUMP_FUNCTION, NullCallWrapper(), CALL_AS_METHOD); |
| |
| __ bind(&miss); |
| // r2: function name. |
| GenerateMissBranch(); |
| |
| // Return the generated code. |
| return cell.is_null() ? GetCode(function) : GetCode(Code::NORMAL, name); |
| } |
| |
| |
| Handle<Code> CallStubCompiler::CompileMathFloorCall( |
| Handle<Object> object, |
| Handle<JSObject> holder, |
| Handle<JSGlobalPropertyCell> cell, |
| Handle<JSFunction> function, |
| Handle<String> name) { |
| // ----------- S t a t e ------------- |
| // -- r2 : function name |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 4] : arg[n] (zero-based) |
| // -- ... |
| // -- sp[argc * 4] : receiver |
| // ----------------------------------- |
| |
| if (!CpuFeatures::IsSupported(VFP2)) { |
| return Handle<Code>::null(); |
| } |
| |
| CpuFeatures::Scope scope_vfp2(VFP2); |
| const int argc = arguments().immediate(); |
| // If the object is not a JSObject or we got an unexpected number of |
| // arguments, bail out to the regular call. |
| if (!object->IsJSObject() || argc != 1) return Handle<Code>::null(); |
| |
| Label miss, slow; |
| GenerateNameCheck(name, &miss); |
| |
| if (cell.is_null()) { |
| __ ldr(r1, MemOperand(sp, 1 * kPointerSize)); |
| STATIC_ASSERT(kSmiTag == 0); |
| __ JumpIfSmi(r1, &miss); |
| CheckPrototypes(Handle<JSObject>::cast(object), r1, holder, r0, r3, r4, |
| name, &miss); |
| } else { |
| ASSERT(cell->value() == *function); |
| GenerateGlobalReceiverCheck(Handle<JSObject>::cast(object), holder, name, |
| &miss); |
| GenerateLoadFunctionFromCell(cell, function, &miss); |
| } |
| |
| // Load the (only) argument into r0. |
| __ ldr(r0, MemOperand(sp, 0 * kPointerSize)); |
| |
| // If the argument is a smi, just return. |
| STATIC_ASSERT(kSmiTag == 0); |
| __ tst(r0, Operand(kSmiTagMask)); |
| __ Drop(argc + 1, eq); |
| __ Ret(eq); |
| |
| __ CheckMap(r0, r1, Heap::kHeapNumberMapRootIndex, &slow, DONT_DO_SMI_CHECK); |
| |
| Label wont_fit_smi, no_vfp_exception, restore_fpscr_and_return; |
| |
| // If vfp3 is enabled, we use the fpu rounding with the RM (round towards |
| // minus infinity) mode. |
| |
| // Load the HeapNumber value. |
| // We will need access to the value in the core registers, so we load it |
| // with ldrd and move it to the fpu. It also spares a sub instruction for |
| // updating the HeapNumber value address, as vldr expects a multiple |
| // of 4 offset. |
| __ Ldrd(r4, r5, FieldMemOperand(r0, HeapNumber::kValueOffset)); |
| __ vmov(d1, r4, r5); |
| |
| // Backup FPSCR. |
| __ vmrs(r3); |
| // Set custom FPCSR: |
| // - Set rounding mode to "Round towards Minus Infinity" |
| // (i.e. bits [23:22] = 0b10). |
| // - Clear vfp cumulative exception flags (bits [3:0]). |
| // - Make sure Flush-to-zero mode control bit is unset (bit 22). |
| __ bic(r9, r3, |
| Operand(kVFPExceptionMask | kVFPRoundingModeMask | kVFPFlushToZeroMask)); |
| __ orr(r9, r9, Operand(kRoundToMinusInf)); |
| __ vmsr(r9); |
| |
| // Convert the argument to an integer. |
| __ vcvt_s32_f64(s0, d1, kFPSCRRounding); |
| |
| // Use vcvt latency to start checking for special cases. |
| // Get the argument exponent and clear the sign bit. |
| __ bic(r6, r5, Operand(HeapNumber::kSignMask)); |
| __ mov(r6, Operand(r6, LSR, HeapNumber::kMantissaBitsInTopWord)); |
| |
| // Retrieve FPSCR and check for vfp exceptions. |
| __ vmrs(r9); |
| __ tst(r9, Operand(kVFPExceptionMask)); |
| __ b(&no_vfp_exception, eq); |
| |
| // Check for NaN, Infinity, and -Infinity. |
| // They are invariant through a Math.Floor call, so just |
| // return the original argument. |
| __ sub(r7, r6, Operand(HeapNumber::kExponentMask |
| >> HeapNumber::kMantissaBitsInTopWord), SetCC); |
| __ b(&restore_fpscr_and_return, eq); |
| // We had an overflow or underflow in the conversion. Check if we |
| // have a big exponent. |
| __ cmp(r7, Operand(HeapNumber::kMantissaBits)); |
| // If greater or equal, the argument is already round and in r0. |
| __ b(&restore_fpscr_and_return, ge); |
| __ b(&wont_fit_smi); |
| |
| __ bind(&no_vfp_exception); |
| // Move the result back to general purpose register r0. |
| __ vmov(r0, s0); |
| // Check if the result fits into a smi. |
| __ add(r1, r0, Operand(0x40000000), SetCC); |
| __ b(&wont_fit_smi, mi); |
| // Tag the result. |
| STATIC_ASSERT(kSmiTag == 0); |
| __ mov(r0, Operand(r0, LSL, kSmiTagSize)); |
| |
| // Check for -0. |
| __ cmp(r0, Operand::Zero()); |
| __ b(&restore_fpscr_and_return, ne); |
| // r5 already holds the HeapNumber exponent. |
| __ tst(r5, Operand(HeapNumber::kSignMask)); |
| // If our HeapNumber is negative it was -0, so load its address and return. |
| // Else r0 is loaded with 0, so we can also just return. |
| __ ldr(r0, MemOperand(sp, 0 * kPointerSize), ne); |
| |
| __ bind(&restore_fpscr_and_return); |
| // Restore FPSCR and return. |
| __ vmsr(r3); |
| __ Drop(argc + 1); |
| __ Ret(); |
| |
| __ bind(&wont_fit_smi); |
| // Restore FPCSR and fall to slow case. |
| __ vmsr(r3); |
| |
| __ bind(&slow); |
| // Tail call the full function. We do not have to patch the receiver |
| // because the function makes no use of it. |
| __ InvokeFunction( |
| function, arguments(), JUMP_FUNCTION, NullCallWrapper(), CALL_AS_METHOD); |
| |
| __ bind(&miss); |
| // r2: function name. |
| GenerateMissBranch(); |
| |
| // Return the generated code. |
| return cell.is_null() ? GetCode(function) : GetCode(Code::NORMAL, name); |
| } |
| |
| |
| Handle<Code> CallStubCompiler::CompileMathAbsCall( |
| Handle<Object> object, |
| Handle<JSObject> holder, |
| Handle<JSGlobalPropertyCell> cell, |
| Handle<JSFunction> function, |
| Handle<String> name) { |
| // ----------- S t a t e ------------- |
| // -- r2 : function name |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 4] : arg[n] (zero-based) |
| // -- ... |
| // -- sp[argc * 4] : receiver |
| // ----------------------------------- |
| |
| const int argc = arguments().immediate(); |
| // If the object is not a JSObject or we got an unexpected number of |
| // arguments, bail out to the regular call. |
| if (!object->IsJSObject() || argc != 1) return Handle<Code>::null(); |
| |
| Label miss; |
| GenerateNameCheck(name, &miss); |
| if (cell.is_null()) { |
| __ ldr(r1, MemOperand(sp, 1 * kPointerSize)); |
| STATIC_ASSERT(kSmiTag == 0); |
| __ JumpIfSmi(r1, &miss); |
| CheckPrototypes(Handle<JSObject>::cast(object), r1, holder, r0, r3, r4, |
| name, &miss); |
| } else { |
| ASSERT(cell->value() == *function); |
| GenerateGlobalReceiverCheck(Handle<JSObject>::cast(object), holder, name, |
| &miss); |
| GenerateLoadFunctionFromCell(cell, function, &miss); |
| } |
| |
| // Load the (only) argument into r0. |
| __ ldr(r0, MemOperand(sp, 0 * kPointerSize)); |
| |
| // Check if the argument is a smi. |
| Label not_smi; |
| STATIC_ASSERT(kSmiTag == 0); |
| __ JumpIfNotSmi(r0, ¬_smi); |
| |
| // Do bitwise not or do nothing depending on the sign of the |
| // argument. |
| __ eor(r1, r0, Operand(r0, ASR, kBitsPerInt - 1)); |
| |
| // Add 1 or do nothing depending on the sign of the argument. |
| __ sub(r0, r1, Operand(r0, ASR, kBitsPerInt - 1), SetCC); |
| |
| // If the result is still negative, go to the slow case. |
| // This only happens for the most negative smi. |
| Label slow; |
| __ b(mi, &slow); |
| |
| // Smi case done. |
| __ Drop(argc + 1); |
| __ Ret(); |
| |
| // Check if the argument is a heap number and load its exponent and |
| // sign. |
| __ bind(¬_smi); |
| __ CheckMap(r0, r1, Heap::kHeapNumberMapRootIndex, &slow, DONT_DO_SMI_CHECK); |
| __ ldr(r1, FieldMemOperand(r0, HeapNumber::kExponentOffset)); |
| |
| // Check the sign of the argument. If the argument is positive, |
| // just return it. |
| Label negative_sign; |
| __ tst(r1, Operand(HeapNumber::kSignMask)); |
| __ b(ne, &negative_sign); |
| __ Drop(argc + 1); |
| __ Ret(); |
| |
| // If the argument is negative, clear the sign, and return a new |
| // number. |
| __ bind(&negative_sign); |
| __ eor(r1, r1, Operand(HeapNumber::kSignMask)); |
| __ ldr(r3, FieldMemOperand(r0, HeapNumber::kMantissaOffset)); |
| __ LoadRoot(r6, Heap::kHeapNumberMapRootIndex); |
| __ AllocateHeapNumber(r0, r4, r5, r6, &slow); |
| __ str(r1, FieldMemOperand(r0, HeapNumber::kExponentOffset)); |
| __ str(r3, FieldMemOperand(r0, HeapNumber::kMantissaOffset)); |
| __ Drop(argc + 1); |
| __ Ret(); |
| |
| // Tail call the full function. We do not have to patch the receiver |
| // because the function makes no use of it. |
| __ bind(&slow); |
| __ InvokeFunction( |
| function, arguments(), JUMP_FUNCTION, NullCallWrapper(), CALL_AS_METHOD); |
| |
| __ bind(&miss); |
| // r2: function name. |
| GenerateMissBranch(); |
| |
| // Return the generated code. |
| return cell.is_null() ? GetCode(function) : GetCode(Code::NORMAL, name); |
| } |
| |
| |
| Handle<Code> CallStubCompiler::CompileFastApiCall( |
| const CallOptimization& optimization, |
| Handle<Object> object, |
| Handle<JSObject> holder, |
| Handle<JSGlobalPropertyCell> cell, |
| Handle<JSFunction> function, |
| Handle<String> name) { |
| Counters* counters = isolate()->counters(); |
| |
| ASSERT(optimization.is_simple_api_call()); |
| // Bail out if object is a global object as we don't want to |
| // repatch it to global receiver. |
| if (object->IsGlobalObject()) return Handle<Code>::null(); |
| if (!cell.is_null()) return Handle<Code>::null(); |
| if (!object->IsJSObject()) return Handle<Code>::null(); |
| int depth = optimization.GetPrototypeDepthOfExpectedType( |
| Handle<JSObject>::cast(object), holder); |
| if (depth == kInvalidProtoDepth) return Handle<Code>::null(); |
| |
| Label miss, miss_before_stack_reserved; |
| GenerateNameCheck(name, &miss_before_stack_reserved); |
| |
| // Get the receiver from the stack. |
| const int argc = arguments().immediate(); |
| __ ldr(r1, MemOperand(sp, argc * kPointerSize)); |
| |
| // Check that the receiver isn't a smi. |
| __ JumpIfSmi(r1, &miss_before_stack_reserved); |
| |
| __ IncrementCounter(counters->call_const(), 1, r0, r3); |
| __ IncrementCounter(counters->call_const_fast_api(), 1, r0, r3); |
| |
| ReserveSpaceForFastApiCall(masm(), r0); |
| |
| // Check that the maps haven't changed and find a Holder as a side effect. |
| CheckPrototypes(Handle<JSObject>::cast(object), r1, holder, r0, r3, r4, name, |
| depth, &miss); |
| |
| GenerateFastApiDirectCall(masm(), optimization, argc); |
| |
| __ bind(&miss); |
| FreeSpaceForFastApiCall(masm()); |
| |
| __ bind(&miss_before_stack_reserved); |
| GenerateMissBranch(); |
| |
| // Return the generated code. |
| return GetCode(function); |
| } |
| |
| |
| void CallStubCompiler::CompileHandlerFrontend(Handle<Object> object, |
| Handle<JSObject> holder, |
| Handle<String> name, |
| CheckType check, |
| Label* success) { |
| // ----------- S t a t e ------------- |
| // -- r2 : name |
| // -- lr : return address |
| // ----------------------------------- |
| Label miss; |
| GenerateNameCheck(name, &miss); |
| |
| // Get the receiver from the stack |
| const int argc = arguments().immediate(); |
| __ ldr(r1, MemOperand(sp, argc * kPointerSize)); |
| |
| // Check that the receiver isn't a smi. |
| if (check != NUMBER_CHECK) { |
| __ JumpIfSmi(r1, &miss); |
| } |
| |
| // Make sure that it's okay not to patch the on stack receiver |
| // unless we're doing a receiver map check. |
| ASSERT(!object->IsGlobalObject() || check == RECEIVER_MAP_CHECK); |
| switch (check) { |
| case RECEIVER_MAP_CHECK: |
| __ IncrementCounter(masm()->isolate()->counters()->call_const(), |
| 1, r0, r3); |
| |
| // Check that the maps haven't changed. |
| CheckPrototypes(Handle<JSObject>::cast(object), r1, holder, r0, r3, r4, |
| name, &miss); |
| |
| // Patch the receiver on the stack with the global proxy if |
| // necessary. |
| if (object->IsGlobalObject()) { |
| __ ldr(r3, FieldMemOperand(r1, GlobalObject::kGlobalReceiverOffset)); |
| __ str(r3, MemOperand(sp, argc * kPointerSize)); |
| } |
| break; |
| |
| case STRING_CHECK: |
| // Check that the object is a two-byte string or a symbol. |
| __ CompareObjectType(r1, r3, r3, FIRST_NONSTRING_TYPE); |
| __ b(ge, &miss); |
| // Check that the maps starting from the prototype haven't changed. |
| GenerateDirectLoadGlobalFunctionPrototype( |
| masm(), Context::STRING_FUNCTION_INDEX, r0, &miss); |
| CheckPrototypes( |
| Handle<JSObject>(JSObject::cast(object->GetPrototype())), |
| r0, holder, r3, r1, r4, name, &miss); |
| break; |
| |
| case NUMBER_CHECK: { |
| Label fast; |
| // Check that the object is a smi or a heap number. |
| __ JumpIfSmi(r1, &fast); |
| __ CompareObjectType(r1, r0, r0, HEAP_NUMBER_TYPE); |
| __ b(ne, &miss); |
| __ bind(&fast); |
| // Check that the maps starting from the prototype haven't changed. |
| GenerateDirectLoadGlobalFunctionPrototype( |
| masm(), Context::NUMBER_FUNCTION_INDEX, r0, &miss); |
| CheckPrototypes( |
| Handle<JSObject>(JSObject::cast(object->GetPrototype())), |
| r0, holder, r3, r1, r4, name, &miss); |
| break; |
| } |
| case BOOLEAN_CHECK: { |
| Label fast; |
| // Check that the object is a boolean. |
| __ LoadRoot(ip, Heap::kTrueValueRootIndex); |
| __ cmp(r1, ip); |
| __ b(eq, &fast); |
| __ LoadRoot(ip, Heap::kFalseValueRootIndex); |
| __ cmp(r1, ip); |
| __ b(ne, &miss); |
| __ bind(&fast); |
| // Check that the maps starting from the prototype haven't changed. |
| GenerateDirectLoadGlobalFunctionPrototype( |
| masm(), Context::BOOLEAN_FUNCTION_INDEX, r0, &miss); |
| CheckPrototypes( |
| Handle<JSObject>(JSObject::cast(object->GetPrototype())), |
| r0, holder, r3, r1, r4, name, &miss); |
| break; |
| } |
| } |
| |
| __ b(success); |
| |
| // Handle call cache miss. |
| __ bind(&miss); |
| GenerateMissBranch(); |
| } |
| |
| |
| void CallStubCompiler::CompileHandlerBackend(Handle<JSFunction> function) { |
| CallKind call_kind = CallICBase::Contextual::decode(extra_state_) |
| ? CALL_AS_FUNCTION |
| : CALL_AS_METHOD; |
| __ InvokeFunction( |
| function, arguments(), JUMP_FUNCTION, NullCallWrapper(), call_kind); |
| } |
| |
| |
| Handle<Code> CallStubCompiler::CompileCallConstant( |
| Handle<Object> object, |
| Handle<JSObject> holder, |
| Handle<String> name, |
| CheckType check, |
| Handle<JSFunction> function) { |
| if (HasCustomCallGenerator(function)) { |
| Handle<Code> code = CompileCustomCall(object, holder, |
| Handle<JSGlobalPropertyCell>::null(), |
| function, name); |
| // A null handle means bail out to the regular compiler code below. |
| if (!code.is_null()) return code; |
| } |
| |
| Label success; |
| |
| CompileHandlerFrontend(object, holder, name, check, &success); |
| __ bind(&success); |
| CompileHandlerBackend(function); |
| |
| |
| // Return the generated code. |
| return GetCode(function); |
| } |
| |
| |
| Handle<Code> CallStubCompiler::CompileCallInterceptor(Handle<JSObject> object, |
| Handle<JSObject> holder, |
| Handle<String> name) { |
| // ----------- S t a t e ------------- |
| // -- r2 : name |
| // -- lr : return address |
| // ----------------------------------- |
| Label miss; |
| GenerateNameCheck(name, &miss); |
| |
| // Get the number of arguments. |
| const int argc = arguments().immediate(); |
| LookupResult lookup(isolate()); |
| LookupPostInterceptor(holder, name, &lookup); |
| |
| // Get the receiver from the stack. |
| __ ldr(r1, MemOperand(sp, argc * kPointerSize)); |
| |
| CallInterceptorCompiler compiler(this, arguments(), r2, extra_state_); |
| compiler.Compile(masm(), object, holder, name, &lookup, r1, r3, r4, r0, |
| &miss); |
| |
| // Move returned value, the function to call, to r1. |
| __ mov(r1, r0); |
| // Restore receiver. |
| __ ldr(r0, MemOperand(sp, argc * kPointerSize)); |
| |
| GenerateCallFunction(masm(), object, arguments(), &miss, extra_state_); |
| |
| // Handle call cache miss. |
| __ bind(&miss); |
| GenerateMissBranch(); |
| |
| // Return the generated code. |
| return GetCode(Code::INTERCEPTOR, name); |
| } |
| |
| |
| Handle<Code> CallStubCompiler::CompileCallGlobal( |
| Handle<JSObject> object, |
| Handle<GlobalObject> holder, |
| Handle<JSGlobalPropertyCell> cell, |
| Handle<JSFunction> function, |
| Handle<String> name) { |
| // ----------- S t a t e ------------- |
| // -- r2 : name |
| // -- lr : return address |
| // ----------------------------------- |
| if (HasCustomCallGenerator(function)) { |
| Handle<Code> code = CompileCustomCall(object, holder, cell, function, name); |
| // A null handle means bail out to the regular compiler code below. |
| if (!code.is_null()) return code; |
| } |
| |
| Label miss; |
| GenerateNameCheck(name, &miss); |
| |
| // Get the number of arguments. |
| const int argc = arguments().immediate(); |
| GenerateGlobalReceiverCheck(object, holder, name, &miss); |
| GenerateLoadFunctionFromCell(cell, function, &miss); |
| |
| // Patch the receiver on the stack with the global proxy if |
| // necessary. |
| if (object->IsGlobalObject()) { |
| __ ldr(r3, FieldMemOperand(r0, GlobalObject::kGlobalReceiverOffset)); |
| __ str(r3, MemOperand(sp, argc * kPointerSize)); |
| } |
| |
| // Set up the context (function already in r1). |
| __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| |
| // Jump to the cached code (tail call). |
| Counters* counters = masm()->isolate()->counters(); |
| __ IncrementCounter(counters->call_global_inline(), 1, r3, r4); |
| ParameterCount expected(function->shared()->formal_parameter_count()); |
| CallKind call_kind = CallICBase::Contextual::decode(extra_state_) |
| ? CALL_AS_FUNCTION |
| : CALL_AS_METHOD; |
| // We call indirectly through the code field in the function to |
| // allow recompilation to take effect without changing any of the |
| // call sites. |
| __ ldr(r3, FieldMemOperand(r1, JSFunction::kCodeEntryOffset)); |
| __ InvokeCode(r3, expected, arguments(), JUMP_FUNCTION, |
| NullCallWrapper(), call_kind); |
| |
| // Handle call cache miss. |
| __ bind(&miss); |
| __ IncrementCounter(counters->call_global_inline_miss(), 1, r1, r3); |
| GenerateMissBranch(); |
| |
| // Return the generated code. |
| return GetCode(Code::NORMAL, name); |
| } |
| |
| |
| Handle<Code> StoreStubCompiler::CompileStoreField(Handle<JSObject> object, |
| int index, |
| Handle<Map> transition, |
| Handle<String> name) { |
| // ----------- S t a t e ------------- |
| // -- r0 : value |
| // -- r1 : receiver |
| // -- r2 : name |
| // -- lr : return address |
| // ----------------------------------- |
| Label miss; |
| |
| GenerateStoreField(masm(), |
| object, |
| index, |
| transition, |
| name, |
| r1, r2, r3, r4, |
| &miss); |
| __ bind(&miss); |
| Handle<Code> ic = masm()->isolate()->builtins()->StoreIC_Miss(); |
| __ Jump(ic, RelocInfo::CODE_TARGET); |
| |
| // Return the generated code. |
| return GetCode(transition.is_null() |
| ? Code::FIELD |
| : Code::MAP_TRANSITION, name); |
| } |
| |
| |
| Handle<Code> StoreStubCompiler::CompileStoreCallback( |
| Handle<String> name, |
| Handle<JSObject> receiver, |
| Handle<JSObject> holder, |
| Handle<AccessorInfo> callback) { |
| // ----------- S t a t e ------------- |
| // -- r0 : value |
| // -- r1 : receiver |
| // -- r2 : name |
| // -- lr : return address |
| // ----------------------------------- |
| Label miss; |
| // Check that the maps haven't changed. |
| __ JumpIfSmi(r1, &miss); |
| CheckPrototypes(receiver, r1, holder, r3, r4, r5, name, &miss); |
| |
| // Stub never generated for non-global objects that require access checks. |
| ASSERT(holder->IsJSGlobalProxy() || !holder->IsAccessCheckNeeded()); |
| |
| __ push(r1); // receiver |
| __ mov(ip, Operand(callback)); // callback info |
| __ Push(ip, r2, r0); |
| |
| // Do tail-call to the runtime system. |
| ExternalReference store_callback_property = |
| ExternalReference(IC_Utility(IC::kStoreCallbackProperty), |
| masm()->isolate()); |
| __ TailCallExternalReference(store_callback_property, 4, 1); |
| |
| // Handle store cache miss. |
| __ bind(&miss); |
| Handle<Code> ic = masm()->isolate()->builtins()->StoreIC_Miss(); |
| __ Jump(ic, RelocInfo::CODE_TARGET); |
| |
| // Return the generated code. |
| return GetCode(Code::CALLBACKS, name); |
| } |
| |
| |
| #undef __ |
| #define __ ACCESS_MASM(masm) |
| |
| |
| void StoreStubCompiler::GenerateStoreViaSetter( |
| MacroAssembler* masm, |
| Handle<JSFunction> setter) { |
| // ----------- S t a t e ------------- |
| // -- r0 : value |
| // -- r1 : receiver |
| // -- r2 : name |
| // -- lr : return address |
| // ----------------------------------- |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| |
| // Save value register, so we can restore it later. |
| __ push(r0); |
| |
| if (!setter.is_null()) { |
| // Call the JavaScript setter with receiver and value on the stack. |
| __ Push(r1, r0); |
| ParameterCount actual(1); |
| __ InvokeFunction(setter, actual, CALL_FUNCTION, NullCallWrapper(), |
| CALL_AS_METHOD); |
| } else { |
| // If we generate a global code snippet for deoptimization only, remember |
| // the place to continue after deoptimization. |
| masm->isolate()->heap()->SetSetterStubDeoptPCOffset(masm->pc_offset()); |
| } |
| |
| // We have to return the passed value, not the return value of the setter. |
| __ pop(r0); |
| |
| // Restore context register. |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| } |
| __ Ret(); |
| } |
| |
| |
| #undef __ |
| #define __ ACCESS_MASM(masm()) |
| |
| |
| Handle<Code> StoreStubCompiler::CompileStoreViaSetter( |
| Handle<String> name, |
| Handle<JSObject> receiver, |
| Handle<JSObject> holder, |
| Handle<JSFunction> setter) { |
| // ----------- S t a t e ------------- |
| // -- r0 : value |
| // -- r1 : receiver |
| // -- r2 : name |
| // -- lr : return address |
| // ----------------------------------- |
| Label miss; |
| |
| // Check that the maps haven't changed. |
| __ JumpIfSmi(r1, &miss); |
| CheckPrototypes(receiver, r1, holder, r3, r4, r5, name, &miss); |
| |
| GenerateStoreViaSetter(masm(), setter); |
| |
| __ bind(&miss); |
| Handle<Code> ic = masm()->isolate()->builtins()->StoreIC_Miss(); |
| __ Jump(ic, RelocInfo::CODE_TARGET); |
| |
| // Return the generated code. |
| return GetCode(Code::CALLBACKS, name); |
| } |
| |
| |
| Handle<Code> StoreStubCompiler::CompileStoreInterceptor( |
| Handle<JSObject> receiver, |
| Handle<String> name) { |
| // ----------- S t a t e ------------- |
| // -- r0 : value |
| // -- r1 : receiver |
| // -- r2 : name |
| // -- lr : return address |
| // ----------------------------------- |
| Label miss; |
| |
| // Check that the map of the object hasn't changed. |
| __ CheckMap(r1, r3, Handle<Map>(receiver->map()), &miss, |
| DO_SMI_CHECK, ALLOW_ELEMENT_TRANSITION_MAPS); |
| |
| // Perform global security token check if needed. |
| if (receiver->IsJSGlobalProxy()) { |
| __ CheckAccessGlobalProxy(r1, r3, &miss); |
| } |
| |
| // Stub is never generated for non-global objects that require access |
| // checks. |
| ASSERT(receiver->IsJSGlobalProxy() || !receiver->IsAccessCheckNeeded()); |
| |
| __ Push(r1, r2, r0); // Receiver, name, value. |
| |
| __ mov(r0, Operand(Smi::FromInt(strict_mode_))); |
| __ push(r0); // strict mode |
| |
| // Do tail-call to the runtime system. |
| ExternalReference store_ic_property = |
| ExternalReference(IC_Utility(IC::kStoreInterceptorProperty), |
| masm()->isolate()); |
| __ TailCallExternalReference(store_ic_property, 4, 1); |
| |
| // Handle store cache miss. |
| __ bind(&miss); |
| Handle<Code> ic = masm()->isolate()->builtins()->StoreIC_Miss(); |
| __ Jump(ic, RelocInfo::CODE_TARGET); |
| |
| // Return the generated code. |
| return GetCode(Code::INTERCEPTOR, name); |
| } |
| |
| |
| Handle<Code> StoreStubCompiler::CompileStoreGlobal( |
| Handle<GlobalObject> object, |
| Handle<JSGlobalPropertyCell> cell, |
| Handle<String> name) { |
| // ----------- S t a t e ------------- |
| // -- r0 : value |
| // -- r1 : receiver |
| // -- r2 : name |
| // -- lr : return address |
| // ----------------------------------- |
| Label miss; |
| |
| // Check that the map of the global has not changed. |
| __ ldr(r3, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| __ cmp(r3, Operand(Handle<Map>(object->map()))); |
| __ b(ne, &miss); |
| |
| // Check that the value in the cell is not the hole. If it is, this |
| // cell could have been deleted and reintroducing the global needs |
| // to update the property details in the property dictionary of the |
| // global object. We bail out to the runtime system to do that. |
| __ mov(r4, Operand(cell)); |
| __ LoadRoot(r5, Heap::kTheHoleValueRootIndex); |
| __ ldr(r6, FieldMemOperand(r4, JSGlobalPropertyCell::kValueOffset)); |
| __ cmp(r5, r6); |
| __ b(eq, &miss); |
| |
| // Store the value in the cell. |
| __ str(r0, FieldMemOperand(r4, JSGlobalPropertyCell::kValueOffset)); |
| // Cells are always rescanned, so no write barrier here. |
| |
| Counters* counters = masm()->isolate()->counters(); |
| __ IncrementCounter(counters->named_store_global_inline(), 1, r4, r3); |
| __ Ret(); |
| |
| // Handle store cache miss. |
| __ bind(&miss); |
| __ IncrementCounter(counters->named_store_global_inline_miss(), 1, r4, r3); |
| Handle<Code> ic = masm()->isolate()->builtins()->StoreIC_Miss(); |
| __ Jump(ic, RelocInfo::CODE_TARGET); |
| |
| // Return the generated code. |
| return GetCode(Code::NORMAL, name); |
| } |
| |
| |
| Handle<Code> LoadStubCompiler::CompileLoadNonexistent( |
| Handle<JSObject> object, |
| Handle<JSObject> last, |
| Handle<String> name, |
| Handle<GlobalObject> global) { |
| // ----------- S t a t e ------------- |
| // -- r0 : receiver |
| // -- lr : return address |
| // ----------------------------------- |
| Label miss; |
| |
| // Check that receiver is not a smi. |
| __ JumpIfSmi(r0, &miss); |
| |
| |
| Register scratch = r1; |
| |
| // Check the maps of the full prototype chain. |
| Register result = |
| CheckPrototypes(object, r0, last, r3, scratch, r4, name, &miss); |
| |
| // If the last object in the prototype chain is a global object, |
| // check that the global property cell is empty. |
| if (!global.is_null()) { |
| GenerateCheckPropertyCell(masm(), global, name, scratch, &miss); |
| } |
| |
| if (!last->HasFastProperties()) { |
| __ ldr(scratch, FieldMemOperand(result, HeapObject::kMapOffset)); |
| __ ldr(scratch, FieldMemOperand(scratch, Map::kPrototypeOffset)); |
| __ cmp(scratch, Operand(isolate()->factory()->null_value())); |
| __ b(ne, &miss); |
| } |
| |
| // Return undefined if maps of the full prototype chain are still the |
| // same and no global property with this name contains a value. |
| __ LoadRoot(r0, Heap::kUndefinedValueRootIndex); |
| __ Ret(); |
| |
| __ bind(&miss); |
| GenerateLoadMiss(masm(), Code::LOAD_IC); |
| |
| // Return the generated code. |
| return GetCode(Code::NONEXISTENT, factory()->empty_string()); |
| } |
| |
| |
| Register* LoadStubCompiler::registers() { |
| // receiver, name, scratch1, scratch2, scratch3, scratch4. |
| static Register registers[] = { r0, r2, r3, r1, r4, r5 }; |
| return registers; |
| } |
| |
| |
| Register* KeyedLoadStubCompiler::registers() { |
| // receiver, name, scratch1, scratch2, scratch3, scratch4. |
| static Register registers[] = { r1, r0, r2, r3, r4, r5 }; |
| return registers; |
| } |
| |
| |
| void KeyedLoadStubCompiler::GenerateNameCheck(Handle<String> name, |
| Register name_reg, |
| Label* miss) { |
| __ cmp(name_reg, Operand(name)); |
| __ b(ne, miss); |
| } |
| |
| |
| #undef __ |
| #define __ ACCESS_MASM(masm) |
| |
| |
| void LoadStubCompiler::GenerateLoadViaGetter(MacroAssembler* masm, |
| Handle<JSFunction> getter) { |
| // ----------- S t a t e ------------- |
| // -- r0 : receiver |
| // -- r2 : name |
| // -- lr : return address |
| // ----------------------------------- |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| |
| if (!getter.is_null()) { |
| // Call the JavaScript getter with the receiver on the stack. |
| __ push(r0); |
| ParameterCount actual(0); |
| __ InvokeFunction(getter, actual, CALL_FUNCTION, NullCallWrapper(), |
| CALL_AS_METHOD); |
| } else { |
| // If we generate a global code snippet for deoptimization only, remember |
| // the place to continue after deoptimization. |
| masm->isolate()->heap()->SetGetterStubDeoptPCOffset(masm->pc_offset()); |
| } |
| |
| // Restore context register. |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| } |
| __ Ret(); |
| } |
| |
| |
| #undef __ |
| #define __ ACCESS_MASM(masm()) |
| |
| |
| Handle<Code> LoadStubCompiler::CompileLoadViaGetter( |
| Handle<JSObject> receiver, |
| Handle<JSObject> holder, |
| Handle<String> name, |
| Handle<JSFunction> getter) { |
| // ----------- S t a t e ------------- |
| // -- r0 : receiver |
| // -- r2 : name |
| // -- lr : return address |
| // ----------------------------------- |
| Label miss; |
| |
| // Check that the maps haven't changed. |
| __ JumpIfSmi(r0, &miss); |
| CheckPrototypes(receiver, r0, holder, r3, r4, r1, name, &miss); |
| |
| GenerateLoadViaGetter(masm(), getter); |
| |
| __ bind(&miss); |
| GenerateLoadMiss(masm(), Code::LOAD_IC); |
| |
| // Return the generated code. |
| return GetCode(Code::CALLBACKS, name); |
| } |
| |
| |
| Handle<Code> LoadStubCompiler::CompileLoadGlobal( |
| Handle<JSObject> object, |
| Handle<GlobalObject> holder, |
| Handle<JSGlobalPropertyCell> cell, |
| Handle<String> name, |
| bool is_dont_delete) { |
| // ----------- S t a t e ------------- |
| // -- r0 : receiver |
| // -- r2 : name |
| // -- lr : return address |
| // ----------------------------------- |
| Label miss; |
| |
| // Check that the map of the global has not changed. |
| __ JumpIfSmi(r0, &miss); |
| CheckPrototypes(object, r0, holder, r3, r4, r1, name, &miss); |
| |
| // Get the value from the cell. |
| __ mov(r3, Operand(cell)); |
| __ ldr(r4, FieldMemOperand(r3, JSGlobalPropertyCell::kValueOffset)); |
| |
| // Check for deleted property if property can actually be deleted. |
| if (!is_dont_delete) { |
| __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| __ cmp(r4, ip); |
| __ b(eq, &miss); |
| } |
| |
| __ mov(r0, r4); |
| Counters* counters = masm()->isolate()->counters(); |
| __ IncrementCounter(counters->named_load_global_stub(), 1, r1, r3); |
| __ Ret(); |
| |
| __ bind(&miss); |
| __ IncrementCounter(counters->named_load_global_stub_miss(), 1, r1, r3); |
| GenerateLoadMiss(masm(), Code::LOAD_IC); |
| |
| // Return the generated code. |
| return GetCode(Code::NORMAL, name); |
| } |
| |
| |
| Handle<Code> KeyedLoadStubCompiler::CompileLoadElement( |
| Handle<Map> receiver_map) { |
| // ----------- S t a t e ------------- |
| // -- lr : return address |
| // -- r0 : key |
| // -- r1 : receiver |
| // ----------------------------------- |
| ElementsKind elements_kind = receiver_map->elements_kind(); |
| if (receiver_map->has_fast_elements() || |
| receiver_map->has_external_array_elements()) { |
| Handle<Code> stub = KeyedLoadFastElementStub( |
| receiver_map->instance_type() == JS_ARRAY_TYPE, |
| elements_kind).GetCode(); |
| __ DispatchMap(r1, r2, receiver_map, stub, DO_SMI_CHECK); |
| } else { |
| Handle<Code> stub = |
| KeyedLoadDictionaryElementStub().GetCode(); |
| __ DispatchMap(r1, r2, receiver_map, stub, DO_SMI_CHECK); |
| } |
| |
| Handle<Code> ic = isolate()->builtins()->KeyedLoadIC_Miss(); |
| __ Jump(ic, RelocInfo::CODE_TARGET); |
| |
| // Return the generated code. |
| return GetCode(Code::NORMAL, factory()->empty_string()); |
| } |
| |
| |
| Handle<Code> KeyedLoadStubCompiler::CompileLoadPolymorphic( |
| MapHandleList* receiver_maps, |
| CodeHandleList* handler_ics) { |
| // ----------- S t a t e ------------- |
| // -- lr : return address |
| // -- r0 : key |
| // -- r1 : receiver |
| // ----------------------------------- |
| Label miss; |
| __ JumpIfSmi(r1, &miss); |
| |
| int receiver_count = receiver_maps->length(); |
| __ ldr(r2, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| for (int current = 0; current < receiver_count; ++current) { |
| __ mov(ip, Operand(receiver_maps->at(current))); |
| __ cmp(r2, ip); |
| __ Jump(handler_ics->at(current), RelocInfo::CODE_TARGET, eq); |
| } |
| |
| __ bind(&miss); |
| Handle<Code> miss_ic = isolate()->builtins()->KeyedLoadIC_Miss(); |
| __ Jump(miss_ic, RelocInfo::CODE_TARGET, al); |
| |
| // Return the generated code. |
| return GetCode(Code::NORMAL, factory()->empty_string(), POLYMORPHIC); |
| } |
| |
| |
| Handle<Code> KeyedStoreStubCompiler::CompileStoreField(Handle<JSObject> object, |
| int index, |
| Handle<Map> transition, |
| Handle<String> name) { |
| // ----------- S t a t e ------------- |
| // -- r0 : value |
| // -- r1 : name |
| // -- r2 : receiver |
| // -- lr : return address |
| // ----------------------------------- |
| Label miss; |
| |
| Counters* counters = masm()->isolate()->counters(); |
| __ IncrementCounter(counters->keyed_store_field(), 1, r3, r4); |
| |
| // Check that the name has not changed. |
| __ cmp(r1, Operand(name)); |
| __ b(ne, &miss); |
| |
| // r3 is used as scratch register. r1 and r2 keep their values if a jump to |
| // the miss label is generated. |
| GenerateStoreField(masm(), |
| object, |
| index, |
| transition, |
| name, |
| r2, r1, r3, r4, |
| &miss); |
| __ bind(&miss); |
| |
| __ DecrementCounter(counters->keyed_store_field(), 1, r3, r4); |
| Handle<Code> ic = masm()->isolate()->builtins()->KeyedStoreIC_Miss(); |
| __ Jump(ic, RelocInfo::CODE_TARGET); |
| |
| // Return the generated code. |
| return GetCode(transition.is_null() |
| ? Code::FIELD |
| : Code::MAP_TRANSITION, name); |
| } |
| |
| |
| Handle<Code> KeyedStoreStubCompiler::CompileStoreElement( |
| Handle<Map> receiver_map) { |
| // ----------- S t a t e ------------- |
| // -- r0 : value |
| // -- r1 : key |
| // -- r2 : receiver |
| // -- lr : return address |
| // -- r3 : scratch |
| // ----------------------------------- |
| ElementsKind elements_kind = receiver_map->elements_kind(); |
| bool is_js_array = receiver_map->instance_type() == JS_ARRAY_TYPE; |
| Handle<Code> stub = |
| KeyedStoreElementStub(is_js_array, elements_kind, grow_mode_).GetCode(); |
| |
| __ DispatchMap(r2, r3, receiver_map, stub, DO_SMI_CHECK); |
| |
| Handle<Code> ic = isolate()->builtins()->KeyedStoreIC_Miss(); |
| __ Jump(ic, RelocInfo::CODE_TARGET); |
| |
| // Return the generated code. |
| return GetCode(Code::NORMAL, factory()->empty_string()); |
| } |
| |
| |
| Handle<Code> KeyedStoreStubCompiler::CompileStorePolymorphic( |
| MapHandleList* receiver_maps, |
| CodeHandleList* handler_stubs, |
| MapHandleList* transitioned_maps) { |
| // ----------- S t a t e ------------- |
| // -- r0 : value |
| // -- r1 : key |
| // -- r2 : receiver |
| // -- lr : return address |
| // -- r3 : scratch |
| // ----------------------------------- |
| Label miss; |
| __ JumpIfSmi(r2, &miss); |
| |
| int receiver_count = receiver_maps->length(); |
| __ ldr(r3, FieldMemOperand(r2, HeapObject::kMapOffset)); |
| for (int i = 0; i < receiver_count; ++i) { |
| __ mov(ip, Operand(receiver_maps->at(i))); |
| __ cmp(r3, ip); |
| if (transitioned_maps->at(i).is_null()) { |
| __ Jump(handler_stubs->at(i), RelocInfo::CODE_TARGET, eq); |
| } else { |
| Label next_map; |
| __ b(ne, &next_map); |
| __ mov(r3, Operand(transitioned_maps->at(i))); |
| __ Jump(handler_stubs->at(i), RelocInfo::CODE_TARGET, al); |
| __ bind(&next_map); |
| } |
| } |
| |
| __ bind(&miss); |
| Handle<Code> miss_ic = isolate()->builtins()->KeyedStoreIC_Miss(); |
| __ Jump(miss_ic, RelocInfo::CODE_TARGET, al); |
| |
| // Return the generated code. |
| return GetCode(Code::NORMAL, factory()->empty_string(), POLYMORPHIC); |
| } |
| |
| |
| Handle<Code> ConstructStubCompiler::CompileConstructStub( |
| Handle<JSFunction> function) { |
| // ----------- S t a t e ------------- |
| // -- r0 : argc |
| // -- r1 : constructor |
| // -- lr : return address |
| // -- [sp] : last argument |
| // ----------------------------------- |
| Label generic_stub_call; |
| |
| // Use r7 for holding undefined which is used in several places below. |
| __ LoadRoot(r7, Heap::kUndefinedValueRootIndex); |
| |
| #ifdef ENABLE_DEBUGGER_SUPPORT |
| // Check to see whether there are any break points in the function code. If |
| // there are jump to the generic constructor stub which calls the actual |
| // code for the function thereby hitting the break points. |
| __ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(r2, FieldMemOperand(r2, SharedFunctionInfo::kDebugInfoOffset)); |
| __ cmp(r2, r7); |
| __ b(ne, &generic_stub_call); |
| #endif |
| |
| // Load the initial map and verify that it is in fact a map. |
| // r1: constructor function |
| // r7: undefined |
| __ ldr(r2, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| __ JumpIfSmi(r2, &generic_stub_call); |
| __ CompareObjectType(r2, r3, r4, MAP_TYPE); |
| __ b(ne, &generic_stub_call); |
| |
| #ifdef DEBUG |
| // Cannot construct functions this way. |
| // r0: argc |
| // r1: constructor function |
| // r2: initial map |
| // r7: undefined |
| __ CompareInstanceType(r2, r3, JS_FUNCTION_TYPE); |
| __ Check(ne, "Function constructed by construct stub."); |
| #endif |
| |
| // Now allocate the JSObject in new space. |
| // r0: argc |
| // r1: constructor function |
| // r2: initial map |
| // r7: undefined |
| ASSERT(function->has_initial_map()); |
| __ ldrb(r3, FieldMemOperand(r2, Map::kInstanceSizeOffset)); |
| #ifdef DEBUG |
| int instance_size = function->initial_map()->instance_size(); |
| __ cmp(r3, Operand(instance_size >> kPointerSizeLog2)); |
| __ Check(eq, "Instance size of initial map changed."); |
| #endif |
| __ AllocateInNewSpace(r3, r4, r5, r6, &generic_stub_call, SIZE_IN_WORDS); |
| |
| // Allocated the JSObject, now initialize the fields. Map is set to initial |
| // map and properties and elements are set to empty fixed array. |
| // r0: argc |
| // r1: constructor function |
| // r2: initial map |
| // r3: object size (in words) |
| // r4: JSObject (not tagged) |
| // r7: undefined |
| __ LoadRoot(r6, Heap::kEmptyFixedArrayRootIndex); |
| __ mov(r5, r4); |
| ASSERT_EQ(0 * kPointerSize, JSObject::kMapOffset); |
| __ str(r2, MemOperand(r5, kPointerSize, PostIndex)); |
| ASSERT_EQ(1 * kPointerSize, JSObject::kPropertiesOffset); |
| __ str(r6, MemOperand(r5, kPointerSize, PostIndex)); |
| ASSERT_EQ(2 * kPointerSize, JSObject::kElementsOffset); |
| __ str(r6, MemOperand(r5, kPointerSize, PostIndex)); |
| |
| // Calculate the location of the first argument. The stack contains only the |
| // argc arguments. |
| __ add(r1, sp, Operand(r0, LSL, kPointerSizeLog2)); |
| |
| // Fill all the in-object properties with undefined. |
| // r0: argc |
| // r1: first argument |
| // r3: object size (in words) |
| // r4: JSObject (not tagged) |
| // r5: First in-object property of JSObject (not tagged) |
| // r7: undefined |
| // Fill the initialized properties with a constant value or a passed argument |
| // depending on the this.x = ...; assignment in the function. |
| Handle<SharedFunctionInfo> shared(function->shared()); |
| for (int i = 0; i < shared->this_property_assignments_count(); i++) { |
| if (shared->IsThisPropertyAssignmentArgument(i)) { |
| Label not_passed, next; |
| // Check if the argument assigned to the property is actually passed. |
| int arg_number = shared->GetThisPropertyAssignmentArgument(i); |
| __ cmp(r0, Operand(arg_number)); |
| __ b(le, ¬_passed); |
| // Argument passed - find it on the stack. |
| __ ldr(r2, MemOperand(r1, (arg_number + 1) * -kPointerSize)); |
| __ str(r2, MemOperand(r5, kPointerSize, PostIndex)); |
| __ b(&next); |
| __ bind(¬_passed); |
| // Set the property to undefined. |
| __ str(r7, MemOperand(r5, kPointerSize, PostIndex)); |
| __ bind(&next); |
| } else { |
| // Set the property to the constant value. |
| Handle<Object> constant(shared->GetThisPropertyAssignmentConstant(i)); |
| __ mov(r2, Operand(constant)); |
| __ str(r2, MemOperand(r5, kPointerSize, PostIndex)); |
| } |
| } |
| |
| // Fill the unused in-object property fields with undefined. |
| for (int i = shared->this_property_assignments_count(); |
| i < function->initial_map()->inobject_properties(); |
| i++) { |
| __ str(r7, MemOperand(r5, kPointerSize, PostIndex)); |
| } |
| |
| // r0: argc |
| // r4: JSObject (not tagged) |
| // Move argc to r1 and the JSObject to return to r0 and tag it. |
| __ mov(r1, r0); |
| __ mov(r0, r4); |
| __ orr(r0, r0, Operand(kHeapObjectTag)); |
| |
| // r0: JSObject |
| // r1: argc |
| // Remove caller arguments and receiver from the stack and return. |
| __ add(sp, sp, Operand(r1, LSL, kPointerSizeLog2)); |
| __ add(sp, sp, Operand(kPointerSize)); |
| Counters* counters = masm()->isolate()->counters(); |
| __ IncrementCounter(counters->constructed_objects(), 1, r1, r2); |
| __ IncrementCounter(counters->constructed_objects_stub(), 1, r1, r2); |
| __ Jump(lr); |
| |
| // Jump to the generic stub in case the specialized code cannot handle the |
| // construction. |
| __ bind(&generic_stub_call); |
| Handle<Code> code = masm()->isolate()->builtins()->JSConstructStubGeneric(); |
| __ Jump(code, RelocInfo::CODE_TARGET); |
| |
| // Return the generated code. |
| return GetCode(); |
| } |
| |
| |
| #undef __ |
| #define __ ACCESS_MASM(masm) |
| |
| |
| void KeyedLoadStubCompiler::GenerateLoadDictionaryElement( |
| MacroAssembler* masm) { |
| // ---------- S t a t e -------------- |
| // -- lr : return address |
| // -- r0 : key |
| // -- r1 : receiver |
| // ----------------------------------- |
| Label slow, miss_force_generic; |
| |
| Register key = r0; |
| Register receiver = r1; |
| |
| __ JumpIfNotSmi(key, &miss_force_generic); |
| __ mov(r2, Operand(key, ASR, kSmiTagSize)); |
| __ ldr(r4, FieldMemOperand(receiver, JSObject::kElementsOffset)); |
| __ LoadFromNumberDictionary(&slow, r4, key, r0, r2, r3, r5); |
| __ Ret(); |
| |
| __ bind(&slow); |
| __ IncrementCounter( |
| masm->isolate()->counters()->keyed_load_external_array_slow(), |
| 1, r2, r3); |
| |
| // ---------- S t a t e -------------- |
| // -- lr : return address |
| // -- r0 : key |
| // -- r1 : receiver |
| // ----------------------------------- |
| Handle<Code> slow_ic = |
| masm->isolate()->builtins()->KeyedLoadIC_Slow(); |
| __ Jump(slow_ic, RelocInfo::CODE_TARGET); |
| |
| // Miss case, call the runtime. |
| __ bind(&miss_force_generic); |
| |
| // ---------- S t a t e -------------- |
| // -- lr : return address |
| // -- r0 : key |
| // -- r1 : receiver |
| // ----------------------------------- |
| |
| Handle<Code> miss_ic = |
| masm->isolate()->builtins()->KeyedLoadIC_MissForceGeneric(); |
| __ Jump(miss_ic, RelocInfo::CODE_TARGET); |
| } |
| |
| |
| static bool IsElementTypeSigned(ElementsKind elements_kind) { |
| switch (elements_kind) { |
| case EXTERNAL_BYTE_ELEMENTS: |
| case EXTERNAL_SHORT_ELEMENTS: |
| case EXTERNAL_INT_ELEMENTS: |
| return true; |
| |
| case EXTERNAL_UNSIGNED_BYTE_ELEMENTS: |
| case EXTERNAL_UNSIGNED_SHORT_ELEMENTS: |
| case EXTERNAL_UNSIGNED_INT_ELEMENTS: |
| case EXTERNAL_PIXEL_ELEMENTS: |
| return false; |
| |
| case EXTERNAL_FLOAT_ELEMENTS: |
| case EXTERNAL_DOUBLE_ELEMENTS: |
| case FAST_ELEMENTS: |
| case FAST_SMI_ELEMENTS: |
| case FAST_DOUBLE_ELEMENTS: |
| case FAST_HOLEY_ELEMENTS: |
| case FAST_HOLEY_SMI_ELEMENTS: |
| case FAST_HOLEY_DOUBLE_ELEMENTS: |
| case DICTIONARY_ELEMENTS: |
| case NON_STRICT_ARGUMENTS_ELEMENTS: |
| UNREACHABLE(); |
| return false; |
| } |
| return false; |
| } |
| |
| |
| static void GenerateSmiKeyCheck(MacroAssembler* masm, |
| Register key, |
| Register scratch0, |
| Register scratch1, |
| DwVfpRegister double_scratch0, |
| DwVfpRegister double_scratch1, |
| Label* fail) { |
| if (CpuFeatures::IsSupported(VFP2)) { |
| CpuFeatures::Scope scope(VFP2); |
| Label key_ok; |
| // Check for smi or a smi inside a heap number. We convert the heap |
| // number and check if the conversion is exact and fits into the smi |
| // range. |
| __ JumpIfSmi(key, &key_ok); |
| __ CheckMap(key, |
| scratch0, |
| Heap::kHeapNumberMapRootIndex, |
| fail, |
| DONT_DO_SMI_CHECK); |
| __ sub(ip, key, Operand(kHeapObjectTag)); |
| __ vldr(double_scratch0, ip, HeapNumber::kValueOffset); |
| __ EmitVFPTruncate(kRoundToZero, |
| scratch0, |
| double_scratch0, |
| scratch1, |
| double_scratch1, |
| kCheckForInexactConversion); |
| __ b(ne, fail); |
| __ TrySmiTag(scratch0, fail, scratch1); |
| __ mov(key, scratch0); |
| __ bind(&key_ok); |
| } else { |
| // Check that the key is a smi. |
| __ JumpIfNotSmi(key, fail); |
| } |
| } |
| |
| |
| void KeyedStoreStubCompiler::GenerateStoreExternalArray( |
| MacroAssembler* masm, |
| ElementsKind elements_kind) { |
| // ---------- S t a t e -------------- |
| // -- r0 : value |
| // -- r1 : key |
| // -- r2 : receiver |
| // -- lr : return address |
| // ----------------------------------- |
| Label slow, check_heap_number, miss_force_generic; |
| |
| // Register usage. |
| Register value = r0; |
| Register key = r1; |
| Register receiver = r2; |
| // r3 mostly holds the elements array or the destination external array. |
| |
| // This stub is meant to be tail-jumped to, the receiver must already |
| // have been verified by the caller to not be a smi. |
| |
| // Check that the key is a smi or a heap number convertible to a smi. |
| GenerateSmiKeyCheck(masm, key, r4, r5, d1, d2, &miss_force_generic); |
| |
| __ ldr(r3, FieldMemOperand(receiver, JSObject::kElementsOffset)); |
| |
| // Check that the index is in range |
| __ ldr(ip, FieldMemOperand(r3, ExternalArray::kLengthOffset)); |
| __ cmp(key, ip); |
| // Unsigned comparison catches both negative and too-large values. |
| __ b(hs, &miss_force_generic); |
| |
| // Handle both smis and HeapNumbers in the fast path. Go to the |
| // runtime for all other kinds of values. |
| // r3: external array. |
| if (elements_kind == EXTERNAL_PIXEL_ELEMENTS) { |
| // Double to pixel conversion is only implemented in the runtime for now. |
| __ JumpIfNotSmi(value, &slow); |
| } else { |
| __ JumpIfNotSmi(value, &check_heap_number); |
| } |
| __ SmiUntag(r5, value); |
| __ ldr(r3, FieldMemOperand(r3, ExternalArray::kExternalPointerOffset)); |
| |
| // r3: base pointer of external storage. |
| // r5: value (integer). |
| switch (elements_kind) { |
| case EXTERNAL_PIXEL_ELEMENTS: |
| // Clamp the value to [0..255]. |
| __ Usat(r5, 8, Operand(r5)); |
| __ strb(r5, MemOperand(r3, key, LSR, 1)); |
| break; |
| case EXTERNAL_BYTE_ELEMENTS: |
| case EXTERNAL_UNSIGNED_BYTE_ELEMENTS: |
| __ strb(r5, MemOperand(r3, key, LSR, 1)); |
| break; |
| case EXTERNAL_SHORT_ELEMENTS: |
| case EXTERNAL_UNSIGNED_SHORT_ELEMENTS: |
| __ strh(r5, MemOperand(r3, key, LSL, 0)); |
| break; |
| case EXTERNAL_INT_ELEMENTS: |
| case EXTERNAL_UNSIGNED_INT_ELEMENTS: |
| __ str(r5, MemOperand(r3, key, LSL, 1)); |
| break; |
| case EXTERNAL_FLOAT_ELEMENTS: |
| // Perform int-to-float conversion and store to memory. |
| __ SmiUntag(r4, key); |
| StoreIntAsFloat(masm, r3, r4, r5, r6, r7, r9); |
| break; |
| case EXTERNAL_DOUBLE_ELEMENTS: |
| __ add(r3, r3, Operand(key, LSL, 2)); |
| // r3: effective address of the double element |
| FloatingPointHelper::Destination destination; |
| if (CpuFeatures::IsSupported(VFP2)) { |
| destination = FloatingPointHelper::kVFPRegisters; |
| } else { |
| destination = FloatingPointHelper::kCoreRegisters; |
| } |
| FloatingPointHelper::ConvertIntToDouble( |
| masm, r5, destination, |
| d0, r6, r7, // These are: double_dst, dst_mantissa, dst_exponent. |
| r4, s2); // These are: scratch2, single_scratch. |
| if (destination == FloatingPointHelper::kVFPRegisters) { |
| CpuFeatures::Scope scope(VFP2); |
| __ vstr(d0, r3, 0); |
| } else { |
| __ str(r6, MemOperand(r3, 0)); |
| __ str(r7, MemOperand(r3, Register::kSizeInBytes)); |
| } |
| break; |
| case FAST_ELEMENTS: |
| case FAST_SMI_ELEMENTS: |
| case FAST_DOUBLE_ELEMENTS: |
| case FAST_HOLEY_ELEMENTS: |
| case FAST_HOLEY_SMI_ELEMENTS: |
| case FAST_HOLEY_DOUBLE_ELEMENTS: |
| case DICTIONARY_ELEMENTS: |
| case NON_STRICT_ARGUMENTS_ELEMENTS: |
| UNREACHABLE(); |
| break; |
| } |
| |
| // Entry registers are intact, r0 holds the value which is the return value. |
| __ Ret(); |
| |
| if (elements_kind != EXTERNAL_PIXEL_ELEMENTS) { |
| // r3: external array. |
| __ bind(&check_heap_number); |
| __ CompareObjectType(value, r5, r6, HEAP_NUMBER_TYPE); |
| __ b(ne, &slow); |
| |
| __ ldr(r3, FieldMemOperand(r3, ExternalArray::kExternalPointerOffset)); |
| |
| // r3: base pointer of external storage. |
| |
| // The WebGL specification leaves the behavior of storing NaN and |
| // +/-Infinity into integer arrays basically undefined. For more |
| // reproducible behavior, convert these to zero. |
| if (CpuFeatures::IsSupported(VFP2)) { |
| CpuFeatures::Scope scope(VFP2); |
| |
| if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) { |
| // vldr requires offset to be a multiple of 4 so we can not |
| // include -kHeapObjectTag into it. |
| __ sub(r5, r0, Operand(kHeapObjectTag)); |
| __ vldr(d0, r5, HeapNumber::kValueOffset); |
| __ add(r5, r3, Operand(key, LSL, 1)); |
| __ vcvt_f32_f64(s0, d0); |
| __ vstr(s0, r5, 0); |
| } else if (elements_kind == EXTERNAL_DOUBLE_ELEMENTS) { |
| __ sub(r5, r0, Operand(kHeapObjectTag)); |
| __ vldr(d0, r5, HeapNumber::kValueOffset); |
| __ add(r5, r3, Operand(key, LSL, 2)); |
| __ vstr(d0, r5, 0); |
| } else { |
| // Hoisted load. vldr requires offset to be a multiple of 4 so we can |
| // not include -kHeapObjectTag into it. |
| __ sub(r5, value, Operand(kHeapObjectTag)); |
| __ vldr(d0, r5, HeapNumber::kValueOffset); |
| __ EmitECMATruncate(r5, d0, d1, r6, r7, r9); |
| |
| switch (elements_kind) { |
| case EXTERNAL_BYTE_ELEMENTS: |
| case EXTERNAL_UNSIGNED_BYTE_ELEMENTS: |
| __ strb(r5, MemOperand(r3, key, LSR, 1)); |
| break; |
| case EXTERNAL_SHORT_ELEMENTS: |
| case EXTERNAL_UNSIGNED_SHORT_ELEMENTS: |
| __ strh(r5, MemOperand(r3, key, LSL, 0)); |
| break; |
| case EXTERNAL_INT_ELEMENTS: |
| case EXTERNAL_UNSIGNED_INT_ELEMENTS: |
| __ str(r5, MemOperand(r3, key, LSL, 1)); |
| break; |
| case EXTERNAL_PIXEL_ELEMENTS: |
| case EXTERNAL_FLOAT_ELEMENTS: |
| case EXTERNAL_DOUBLE_ELEMENTS: |
| case FAST_ELEMENTS: |
| case FAST_SMI_ELEMENTS: |
| case FAST_DOUBLE_ELEMENTS: |
| case FAST_HOLEY_ELEMENTS: |
| case FAST_HOLEY_SMI_ELEMENTS: |
| case FAST_HOLEY_DOUBLE_ELEMENTS: |
| case DICTIONARY_ELEMENTS: |
| case NON_STRICT_ARGUMENTS_ELEMENTS: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| |
| // Entry registers are intact, r0 holds the value which is the return |
| // value. |
| __ Ret(); |
| } else { |
| // VFP3 is not available do manual conversions. |
| __ ldr(r5, FieldMemOperand(value, HeapNumber::kExponentOffset)); |
| __ ldr(r6, FieldMemOperand(value, HeapNumber::kMantissaOffset)); |
| |
| if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) { |
| Label done, nan_or_infinity_or_zero; |
| static const int kMantissaInHiWordShift = |
| kBinary32MantissaBits - HeapNumber::kMantissaBitsInTopWord; |
| |
| static const int kMantissaInLoWordShift = |
| kBitsPerInt - kMantissaInHiWordShift; |
| |
| // Test for all special exponent values: zeros, subnormal numbers, NaNs |
| // and infinities. All these should be converted to 0. |
| __ mov(r7, Operand(HeapNumber::kExponentMask)); |
| __ and_(r9, r5, Operand(r7), SetCC); |
| __ b(eq, &nan_or_infinity_or_zero); |
| |
| __ teq(r9, Operand(r7)); |
| __ mov(r9, Operand(kBinary32ExponentMask), LeaveCC, eq); |
| __ b(eq, &nan_or_infinity_or_zero); |
| |
| // Rebias exponent. |
| __ mov(r9, Operand(r9, LSR, HeapNumber::kExponentShift)); |
| __ add(r9, |
| r9, |
| Operand(kBinary32ExponentBias - HeapNumber::kExponentBias)); |
| |
| __ cmp(r9, Operand(kBinary32MaxExponent)); |
| __ and_(r5, r5, Operand(HeapNumber::kSignMask), LeaveCC, gt); |
| __ orr(r5, r5, Operand(kBinary32ExponentMask), LeaveCC, gt); |
| __ b(gt, &done); |
| |
| __ cmp(r9, Operand(kBinary32MinExponent)); |
| __ and_(r5, r5, Operand(HeapNumber::kSignMask), LeaveCC, lt); |
| __ b(lt, &done); |
| |
| __ and_(r7, r5, Operand(HeapNumber::kSignMask)); |
| __ and_(r5, r5, Operand(HeapNumber::kMantissaMask)); |
| __ orr(r7, r7, Operand(r5, LSL, kMantissaInHiWordShift)); |
| __ orr(r7, r7, Operand(r6, LSR, kMantissaInLoWordShift)); |
| __ orr(r5, r7, Operand(r9, LSL, kBinary32ExponentShift)); |
| |
| __ bind(&done); |
| __ str(r5, MemOperand(r3, key, LSL, 1)); |
| // Entry registers are intact, r0 holds the value which is the return |
| // value. |
| __ Ret(); |
| |
| __ bind(&nan_or_infinity_or_zero); |
| __ and_(r7, r5, Operand(HeapNumber::kSignMask)); |
| __ and_(r5, r5, Operand(HeapNumber::kMantissaMask)); |
| __ orr(r9, r9, r7); |
| __ orr(r9, r9, Operand(r5, LSL, kMantissaInHiWordShift)); |
| __ orr(r5, r9, Operand(r6, LSR, kMantissaInLoWordShift)); |
| __ b(&done); |
| } else if (elements_kind == EXTERNAL_DOUBLE_ELEMENTS) { |
| __ add(r7, r3, Operand(key, LSL, 2)); |
| // r7: effective address of destination element. |
| __ str(r6, MemOperand(r7, 0)); |
| __ str(r5, MemOperand(r7, Register::kSizeInBytes)); |
| __ Ret(); |
| } else { |
| bool is_signed_type = IsElementTypeSigned(elements_kind); |
| int meaningfull_bits = is_signed_type ? (kBitsPerInt - 1) : kBitsPerInt; |
| int32_t min_value = is_signed_type ? 0x80000000 : 0x00000000; |
| |
| Label done, sign; |
| |
| // Test for all special exponent values: zeros, subnormal numbers, NaNs |
| // and infinities. All these should be converted to 0. |
| __ mov(r7, Operand(HeapNumber::kExponentMask)); |
| __ and_(r9, r5, Operand(r7), SetCC); |
| __ mov(r5, Operand::Zero(), LeaveCC, eq); |
| __ b(eq, &done); |
| |
| __ teq(r9, Operand(r7)); |
| __ mov(r5, Operand::Zero(), LeaveCC, eq); |
| __ b(eq, &done); |
| |
| // Unbias exponent. |
| __ mov(r9, Operand(r9, LSR, HeapNumber::kExponentShift)); |
| __ sub(r9, r9, Operand(HeapNumber::kExponentBias), SetCC); |
| // If exponent is negative then result is 0. |
| __ mov(r5, Operand::Zero(), LeaveCC, mi); |
| __ b(mi, &done); |
| |
| // If exponent is too big then result is minimal value. |
| __ cmp(r9, Operand(meaningfull_bits - 1)); |
| __ mov(r5, Operand(min_value), LeaveCC, ge); |
| __ b(ge, &done); |
| |
| __ and_(r7, r5, Operand(HeapNumber::kSignMask), SetCC); |
| __ and_(r5, r5, Operand(HeapNumber::kMantissaMask)); |
| __ orr(r5, r5, Operand(1u << HeapNumber::kMantissaBitsInTopWord)); |
| |
| __ rsb(r9, r9, Operand(HeapNumber::kMantissaBitsInTopWord), SetCC); |
| __ mov(r5, Operand(r5, LSR, r9), LeaveCC, pl); |
| __ b(pl, &sign); |
| |
| __ rsb(r9, r9, Operand::Zero()); |
| __ mov(r5, Operand(r5, LSL, r9)); |
| __ rsb(r9, r9, Operand(meaningfull_bits)); |
| __ orr(r5, r5, Operand(r6, LSR, r9)); |
| |
| __ bind(&sign); |
| __ teq(r7, Operand::Zero()); |
| __ rsb(r5, r5, Operand::Zero(), LeaveCC, ne); |
| |
| __ bind(&done); |
| switch (elements_kind) { |
| case EXTERNAL_BYTE_ELEMENTS: |
| case EXTERNAL_UNSIGNED_BYTE_ELEMENTS: |
| __ strb(r5, MemOperand(r3, key, LSR, 1)); |
| break; |
| case EXTERNAL_SHORT_ELEMENTS: |
| case EXTERNAL_UNSIGNED_SHORT_ELEMENTS: |
| __ strh(r5, MemOperand(r3, key, LSL, 0)); |
| break; |
| case EXTERNAL_INT_ELEMENTS: |
| case EXTERNAL_UNSIGNED_INT_ELEMENTS: |
| __ str(r5, MemOperand(r3, key, LSL, 1)); |
| break; |
| case EXTERNAL_PIXEL_ELEMENTS: |
| case EXTERNAL_FLOAT_ELEMENTS: |
| case EXTERNAL_DOUBLE_ELEMENTS: |
| case FAST_ELEMENTS: |
| case FAST_SMI_ELEMENTS: |
| case FAST_DOUBLE_ELEMENTS: |
| case FAST_HOLEY_ELEMENTS: |
| case FAST_HOLEY_SMI_ELEMENTS: |
| case FAST_HOLEY_DOUBLE_ELEMENTS: |
| case DICTIONARY_ELEMENTS: |
| case NON_STRICT_ARGUMENTS_ELEMENTS: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| } |
| } |
| |
| // Slow case, key and receiver still in r0 and r1. |
| __ bind(&slow); |
| __ IncrementCounter( |
| masm->isolate()->counters()->keyed_load_external_array_slow(), |
| 1, r2, r3); |
| |
| // ---------- S t a t e -------------- |
| // -- lr : return address |
| // -- r0 : key |
| // -- r1 : receiver |
| // ----------------------------------- |
| Handle<Code> slow_ic = |
| masm->isolate()->builtins()->KeyedStoreIC_Slow(); |
| __ Jump(slow_ic, RelocInfo::CODE_TARGET); |
| |
| // Miss case, call the runtime. |
| __ bind(&miss_force_generic); |
| |
| // ---------- S t a t e -------------- |
| // -- lr : return address |
| // -- r0 : key |
| // -- r1 : receiver |
| // ----------------------------------- |
| |
| Handle<Code> miss_ic = |
| masm->isolate()->builtins()->KeyedStoreIC_MissForceGeneric(); |
| __ Jump(miss_ic, RelocInfo::CODE_TARGET); |
| } |
| |
| |
| void KeyedStoreStubCompiler::GenerateStoreFastElement( |
| MacroAssembler* masm, |
| bool is_js_array, |
| ElementsKind elements_kind, |
| KeyedAccessGrowMode grow_mode) { |
| // ----------- S t a t e ------------- |
| // -- r0 : value |
| // -- r1 : key |
| // -- r2 : receiver |
| // -- lr : return address |
| // -- r3 : scratch |
| // -- r4 : scratch (elements) |
| // ----------------------------------- |
| Label miss_force_generic, transition_elements_kind, grow, slow; |
| Label finish_store, check_capacity; |
| |
| Register value_reg = r0; |
| Register key_reg = r1; |
| Register receiver_reg = r2; |
| Register scratch = r4; |
| Register elements_reg = r3; |
| Register length_reg = r5; |
| Register scratch2 = r6; |
| |
| // This stub is meant to be tail-jumped to, the receiver must already |
| // have been verified by the caller to not be a smi. |
| |
| // Check that the key is a smi or a heap number convertible to a smi. |
| GenerateSmiKeyCheck(masm, key_reg, r4, r5, d1, d2, &miss_force_generic); |
| |
| if (IsFastSmiElementsKind(elements_kind)) { |
| __ JumpIfNotSmi(value_reg, &transition_elements_kind); |
| } |
| |
| // Check that the key is within bounds. |
| __ ldr(elements_reg, |
| FieldMemOperand(receiver_reg, JSObject::kElementsOffset)); |
| if (is_js_array) { |
| __ ldr(scratch, FieldMemOperand(receiver_reg, JSArray::kLengthOffset)); |
| } else { |
| __ ldr(scratch, FieldMemOperand(elements_reg, FixedArray::kLengthOffset)); |
| } |
| // Compare smis. |
| __ cmp(key_reg, scratch); |
| if (is_js_array && grow_mode == ALLOW_JSARRAY_GROWTH) { |
| __ b(hs, &grow); |
| } else { |
| __ b(hs, &miss_force_generic); |
| } |
| |
| // Make sure elements is a fast element array, not 'cow'. |
| __ CheckMap(elements_reg, |
| scratch, |
| Heap::kFixedArrayMapRootIndex, |
| &miss_force_generic, |
| DONT_DO_SMI_CHECK); |
| |
| __ bind(&finish_store); |
| if (IsFastSmiElementsKind(elements_kind)) { |
| __ add(scratch, |
| elements_reg, |
| Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize < kPointerSizeLog2); |
| __ add(scratch, |
| scratch, |
| Operand(key_reg, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| __ str(value_reg, MemOperand(scratch)); |
| } else { |
| ASSERT(IsFastObjectElementsKind(elements_kind)); |
| __ add(scratch, |
| elements_reg, |
| Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize < kPointerSizeLog2); |
| __ add(scratch, |
| scratch, |
| Operand(key_reg, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| __ str(value_reg, MemOperand(scratch)); |
| __ mov(receiver_reg, value_reg); |
| __ RecordWrite(elements_reg, // Object. |
| scratch, // Address. |
| receiver_reg, // Value. |
| kLRHasNotBeenSaved, |
| kDontSaveFPRegs); |
| } |
| // value_reg (r0) is preserved. |
| // Done. |
| __ Ret(); |
| |
| __ bind(&miss_force_generic); |
| Handle<Code> ic = |
| masm->isolate()->builtins()->KeyedStoreIC_MissForceGeneric(); |
| __ Jump(ic, RelocInfo::CODE_TARGET); |
| |
| __ bind(&transition_elements_kind); |
| Handle<Code> ic_miss = masm->isolate()->builtins()->KeyedStoreIC_Miss(); |
| __ Jump(ic_miss, RelocInfo::CODE_TARGET); |
| |
| if (is_js_array && grow_mode == ALLOW_JSARRAY_GROWTH) { |
| // Grow the array by a single element if possible. |
| __ bind(&grow); |
| |
| // Make sure the array is only growing by a single element, anything else |
| // must be handled by the runtime. Flags already set by previous compare. |
| __ b(ne, &miss_force_generic); |
| |
| // Check for the empty array, and preallocate a small backing store if |
| // possible. |
| __ ldr(length_reg, |
| FieldMemOperand(receiver_reg, JSArray::kLengthOffset)); |
| __ ldr(elements_reg, |
| FieldMemOperand(receiver_reg, JSObject::kElementsOffset)); |
| __ CompareRoot(elements_reg, Heap::kEmptyFixedArrayRootIndex); |
| __ b(ne, &check_capacity); |
| |
| int size = FixedArray::SizeFor(JSArray::kPreallocatedArrayElements); |
| __ AllocateInNewSpace(size, elements_reg, scratch, scratch2, &slow, |
| TAG_OBJECT); |
| |
| __ LoadRoot(scratch, Heap::kFixedArrayMapRootIndex); |
| __ str(scratch, FieldMemOperand(elements_reg, JSObject::kMapOffset)); |
| __ mov(scratch, Operand(Smi::FromInt(JSArray::kPreallocatedArrayElements))); |
| __ str(scratch, FieldMemOperand(elements_reg, FixedArray::kLengthOffset)); |
| __ LoadRoot(scratch, Heap::kTheHoleValueRootIndex); |
| for (int i = 1; i < JSArray::kPreallocatedArrayElements; ++i) { |
| __ str(scratch, FieldMemOperand(elements_reg, FixedArray::SizeFor(i))); |
| } |
| |
| // Store the element at index zero. |
| __ str(value_reg, FieldMemOperand(elements_reg, FixedArray::SizeFor(0))); |
| |
| // Install the new backing store in the JSArray. |
| __ str(elements_reg, |
| FieldMemOperand(receiver_reg, JSObject::kElementsOffset)); |
| __ RecordWriteField(receiver_reg, JSObject::kElementsOffset, elements_reg, |
| scratch, kLRHasNotBeenSaved, kDontSaveFPRegs, |
| EMIT_REMEMBERED_SET, OMIT_SMI_CHECK); |
| |
| // Increment the length of the array. |
| __ mov(length_reg, Operand(Smi::FromInt(1))); |
| __ str(length_reg, FieldMemOperand(receiver_reg, JSArray::kLengthOffset)); |
| __ Ret(); |
| |
| __ bind(&check_capacity); |
| // Check for cow elements, in general they are not handled by this stub |
| __ CheckMap(elements_reg, |
| scratch, |
| Heap::kFixedCOWArrayMapRootIndex, |
| &miss_force_generic, |
| DONT_DO_SMI_CHECK); |
| |
| __ ldr(scratch, FieldMemOperand(elements_reg, FixedArray::kLengthOffset)); |
| __ cmp(length_reg, scratch); |
| __ b(hs, &slow); |
| |
| // Grow the array and finish the store. |
| __ add(length_reg, length_reg, Operand(Smi::FromInt(1))); |
| __ str(length_reg, FieldMemOperand(receiver_reg, JSArray::kLengthOffset)); |
| __ jmp(&finish_store); |
| |
| __ bind(&slow); |
| Handle<Code> ic_slow = masm->isolate()->builtins()->KeyedStoreIC_Slow(); |
| __ Jump(ic_slow, RelocInfo::CODE_TARGET); |
| } |
| } |
| |
| |
| void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement( |
| MacroAssembler* masm, |
| bool is_js_array, |
| KeyedAccessGrowMode grow_mode) { |
| // ----------- S t a t e ------------- |
| // -- r0 : value |
| // -- r1 : key |
| // -- r2 : receiver |
| // -- lr : return address |
| // -- r3 : scratch (elements backing store) |
| // -- r4 : scratch |
| // -- r5 : scratch |
| // -- r6 : scratch |
| // -- r7 : scratch |
| // -- r9 : scratch |
| // ----------------------------------- |
| Label miss_force_generic, transition_elements_kind, grow, slow; |
| Label finish_store, check_capacity; |
| |
| Register value_reg = r0; |
| Register key_reg = r1; |
| Register receiver_reg = r2; |
| Register elements_reg = r3; |
| Register scratch1 = r4; |
| Register scratch2 = r5; |
| Register scratch3 = r6; |
| Register scratch4 = r7; |
| Register scratch5 = r9; |
| Register length_reg = r7; |
| |
| // This stub is meant to be tail-jumped to, the receiver must already |
| // have been verified by the caller to not be a smi. |
| |
| // Check that the key is a smi or a heap number convertible to a smi. |
| GenerateSmiKeyCheck(masm, key_reg, r4, r5, d1, d2, &miss_force_generic); |
| |
| __ ldr(elements_reg, |
| FieldMemOperand(receiver_reg, JSObject::kElementsOffset)); |
| |
| // Check that the key is within bounds. |
| if (is_js_array) { |
| __ ldr(scratch1, FieldMemOperand(receiver_reg, JSArray::kLengthOffset)); |
| } else { |
| __ ldr(scratch1, |
| FieldMemOperand(elements_reg, FixedArray::kLengthOffset)); |
| } |
| // Compare smis, unsigned compare catches both negative and out-of-bound |
| // indexes. |
| __ cmp(key_reg, scratch1); |
| if (grow_mode == ALLOW_JSARRAY_GROWTH) { |
| __ b(hs, &grow); |
| } else { |
| __ b(hs, &miss_force_generic); |
| } |
| |
| __ bind(&finish_store); |
| __ StoreNumberToDoubleElements(value_reg, |
| key_reg, |
| // All registers after this are overwritten. |
| elements_reg, |
| scratch1, |
| scratch2, |
| scratch3, |
| scratch4, |
| &transition_elements_kind); |
| __ Ret(); |
| |
| // Handle store cache miss, replacing the ic with the generic stub. |
| __ bind(&miss_force_generic); |
| Handle<Code> ic = |
| masm->isolate()->builtins()->KeyedStoreIC_MissForceGeneric(); |
| __ Jump(ic, RelocInfo::CODE_TARGET); |
| |
| __ bind(&transition_elements_kind); |
| Handle<Code> ic_miss = masm->isolate()->builtins()->KeyedStoreIC_Miss(); |
| __ Jump(ic_miss, RelocInfo::CODE_TARGET); |
| |
| if (is_js_array && grow_mode == ALLOW_JSARRAY_GROWTH) { |
| // Grow the array by a single element if possible. |
| __ bind(&grow); |
| |
| // Make sure the array is only growing by a single element, anything else |
| // must be handled by the runtime. Flags already set by previous compare. |
| __ b(ne, &miss_force_generic); |
| |
| // Transition on values that can't be stored in a FixedDoubleArray. |
| Label value_is_smi; |
| __ JumpIfSmi(value_reg, &value_is_smi); |
| __ ldr(scratch1, FieldMemOperand(value_reg, HeapObject::kMapOffset)); |
| __ CompareRoot(scratch1, Heap::kHeapNumberMapRootIndex); |
| __ b(ne, &transition_elements_kind); |
| __ bind(&value_is_smi); |
| |
| // Check for the empty array, and preallocate a small backing store if |
| // possible. |
| __ ldr(length_reg, |
| FieldMemOperand(receiver_reg, JSArray::kLengthOffset)); |
| __ ldr(elements_reg, |
| FieldMemOperand(receiver_reg, JSObject::kElementsOffset)); |
| __ CompareRoot(elements_reg, Heap::kEmptyFixedArrayRootIndex); |
| __ b(ne, &check_capacity); |
| |
| int size = FixedDoubleArray::SizeFor(JSArray::kPreallocatedArrayElements); |
| __ AllocateInNewSpace(size, elements_reg, scratch1, scratch2, &slow, |
| TAG_OBJECT); |
| |
| // Initialize the new FixedDoubleArray. |
| __ LoadRoot(scratch1, Heap::kFixedDoubleArrayMapRootIndex); |
| __ str(scratch1, FieldMemOperand(elements_reg, JSObject::kMapOffset)); |
| __ mov(scratch1, |
| Operand(Smi::FromInt(JSArray::kPreallocatedArrayElements))); |
| __ str(scratch1, |
| FieldMemOperand(elements_reg, FixedDoubleArray::kLengthOffset)); |
| |
| __ mov(scratch1, elements_reg); |
| __ StoreNumberToDoubleElements(value_reg, |
| key_reg, |
| // All registers after this are overwritten. |
| scratch1, |
| scratch2, |
| scratch3, |
| scratch4, |
| scratch5, |
| &transition_elements_kind); |
| |
| __ mov(scratch1, Operand(kHoleNanLower32)); |
| __ mov(scratch2, Operand(kHoleNanUpper32)); |
| for (int i = 1; i < JSArray::kPreallocatedArrayElements; i++) { |
| int offset = FixedDoubleArray::OffsetOfElementAt(i); |
| __ str(scratch1, FieldMemOperand(elements_reg, offset)); |
| __ str(scratch2, FieldMemOperand(elements_reg, offset + kPointerSize)); |
| } |
| |
| // Install the new backing store in the JSArray. |
| __ str(elements_reg, |
| FieldMemOperand(receiver_reg, JSObject::kElementsOffset)); |
| __ RecordWriteField(receiver_reg, JSObject::kElementsOffset, elements_reg, |
| scratch1, kLRHasNotBeenSaved, kDontSaveFPRegs, |
| EMIT_REMEMBERED_SET, OMIT_SMI_CHECK); |
| |
| // Increment the length of the array. |
| __ mov(length_reg, Operand(Smi::FromInt(1))); |
| __ str(length_reg, FieldMemOperand(receiver_reg, JSArray::kLengthOffset)); |
| __ ldr(elements_reg, |
| FieldMemOperand(receiver_reg, JSObject::kElementsOffset)); |
| __ Ret(); |
| |
| __ bind(&check_capacity); |
| // Make sure that the backing store can hold additional elements. |
| __ ldr(scratch1, |
| FieldMemOperand(elements_reg, FixedDoubleArray::kLengthOffset)); |
| __ cmp(length_reg, scratch1); |
| __ b(hs, &slow); |
| |
| // Grow the array and finish the store. |
| __ add(length_reg, length_reg, Operand(Smi::FromInt(1))); |
| __ str(length_reg, FieldMemOperand(receiver_reg, JSArray::kLengthOffset)); |
| __ jmp(&finish_store); |
| |
| __ bind(&slow); |
| Handle<Code> ic_slow = masm->isolate()->builtins()->KeyedStoreIC_Slow(); |
| __ Jump(ic_slow, RelocInfo::CODE_TARGET); |
| } |
| } |
| |
| |
| #undef __ |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_TARGET_ARCH_ARM |