| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #if V8_TARGET_ARCH_ARM |
| |
| #include "src/codegen.h" |
| #include "src/debug/debug.h" |
| #include "src/deoptimizer.h" |
| #include "src/full-codegen/full-codegen.h" |
| #include "src/runtime/runtime.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| #define __ ACCESS_MASM(masm) |
| |
| |
| void Builtins::Generate_Adaptor(MacroAssembler* masm, |
| CFunctionId id, |
| BuiltinExtraArguments extra_args) { |
| // ----------- S t a t e ------------- |
| // -- r0 : number of arguments excluding receiver |
| // (only guaranteed when the called function |
| // is not marked as DontAdaptArguments) |
| // -- r1 : called function |
| // -- sp[0] : last argument |
| // -- ... |
| // -- sp[4 * (argc - 1)] : first argument |
| // -- sp[4 * argc] : receiver |
| // ----------------------------------- |
| __ AssertFunction(r1); |
| |
| // Make sure we operate in the context of the called function (for example |
| // ConstructStubs implemented in C++ will be run in the context of the caller |
| // instead of the callee, due to the way that [[Construct]] is defined for |
| // ordinary functions). |
| // TODO(bmeurer): Can we make this more robust? |
| __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| |
| // Insert extra arguments. |
| int num_extra_args = 0; |
| if (extra_args == NEEDS_CALLED_FUNCTION) { |
| num_extra_args = 1; |
| __ push(r1); |
| } else { |
| DCHECK(extra_args == NO_EXTRA_ARGUMENTS); |
| } |
| |
| // JumpToExternalReference expects r0 to contain the number of arguments |
| // including the receiver and the extra arguments. But r0 is only valid |
| // if the called function is marked as DontAdaptArguments, otherwise we |
| // need to load the argument count from the SharedFunctionInfo. |
| __ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(r2, |
| FieldMemOperand(r2, SharedFunctionInfo::kFormalParameterCountOffset)); |
| __ SmiUntag(r2); |
| __ cmp(r2, Operand(SharedFunctionInfo::kDontAdaptArgumentsSentinel)); |
| __ mov(r0, r2, LeaveCC, ne); |
| __ add(r0, r0, Operand(num_extra_args + 1)); |
| |
| __ JumpToExternalReference(ExternalReference(id, masm->isolate())); |
| } |
| |
| |
| // Load the built-in InternalArray function from the current context. |
| static void GenerateLoadInternalArrayFunction(MacroAssembler* masm, |
| Register result) { |
| // Load the native context. |
| |
| __ ldr(result, |
| MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
| __ ldr(result, FieldMemOperand(result, JSGlobalObject::kNativeContextOffset)); |
| // Load the InternalArray function from the native context. |
| __ ldr(result, |
| MemOperand(result, |
| Context::SlotOffset( |
| Context::INTERNAL_ARRAY_FUNCTION_INDEX))); |
| } |
| |
| |
| // Load the built-in Array function from the current context. |
| static void GenerateLoadArrayFunction(MacroAssembler* masm, Register result) { |
| // Load the native context. |
| |
| __ ldr(result, |
| MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
| __ ldr(result, FieldMemOperand(result, JSGlobalObject::kNativeContextOffset)); |
| // Load the Array function from the native context. |
| __ ldr(result, |
| MemOperand(result, |
| Context::SlotOffset(Context::ARRAY_FUNCTION_INDEX))); |
| } |
| |
| |
| void Builtins::Generate_InternalArrayCode(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : number of arguments |
| // -- lr : return address |
| // -- sp[...]: constructor arguments |
| // ----------------------------------- |
| Label generic_array_code, one_or_more_arguments, two_or_more_arguments; |
| |
| // Get the InternalArray function. |
| GenerateLoadInternalArrayFunction(masm, r1); |
| |
| if (FLAG_debug_code) { |
| // Initial map for the builtin InternalArray functions should be maps. |
| __ ldr(r2, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| __ SmiTst(r2); |
| __ Assert(ne, kUnexpectedInitialMapForInternalArrayFunction); |
| __ CompareObjectType(r2, r3, r4, MAP_TYPE); |
| __ Assert(eq, kUnexpectedInitialMapForInternalArrayFunction); |
| } |
| |
| // Run the native code for the InternalArray function called as a normal |
| // function. |
| // tail call a stub |
| InternalArrayConstructorStub stub(masm->isolate()); |
| __ TailCallStub(&stub); |
| } |
| |
| |
| void Builtins::Generate_ArrayCode(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : number of arguments |
| // -- lr : return address |
| // -- sp[...]: constructor arguments |
| // ----------------------------------- |
| Label generic_array_code, one_or_more_arguments, two_or_more_arguments; |
| |
| // Get the Array function. |
| GenerateLoadArrayFunction(masm, r1); |
| |
| if (FLAG_debug_code) { |
| // Initial map for the builtin Array functions should be maps. |
| __ ldr(r2, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| __ SmiTst(r2); |
| __ Assert(ne, kUnexpectedInitialMapForArrayFunction); |
| __ CompareObjectType(r2, r3, r4, MAP_TYPE); |
| __ Assert(eq, kUnexpectedInitialMapForArrayFunction); |
| } |
| |
| __ mov(r3, r1); |
| // Run the native code for the Array function called as a normal function. |
| // tail call a stub |
| __ LoadRoot(r2, Heap::kUndefinedValueRootIndex); |
| ArrayConstructorStub stub(masm->isolate()); |
| __ TailCallStub(&stub); |
| } |
| |
| |
| // static |
| void Builtins::Generate_StringConstructor(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : number of arguments |
| // -- r1 : constructor function |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 4] : arg[n] (zero based) |
| // -- sp[argc * 4] : receiver |
| // ----------------------------------- |
| |
| // 1. Load the first argument into r0 and get rid of the rest (including the |
| // receiver). |
| Label no_arguments; |
| { |
| __ sub(r0, r0, Operand(1), SetCC); |
| __ b(lo, &no_arguments); |
| __ ldr(r0, MemOperand(sp, r0, LSL, kPointerSizeLog2, PreIndex)); |
| __ Drop(2); |
| } |
| |
| // 2a. At least one argument, return r0 if it's a string, otherwise |
| // dispatch to appropriate conversion. |
| Label to_string, symbol_descriptive_string; |
| { |
| __ JumpIfSmi(r0, &to_string); |
| STATIC_ASSERT(FIRST_NONSTRING_TYPE == SYMBOL_TYPE); |
| __ CompareObjectType(r0, r1, r1, FIRST_NONSTRING_TYPE); |
| __ b(hi, &to_string); |
| __ b(eq, &symbol_descriptive_string); |
| __ Ret(); |
| } |
| |
| // 2b. No arguments, return the empty string (and pop the receiver). |
| __ bind(&no_arguments); |
| { |
| __ LoadRoot(r0, Heap::kempty_stringRootIndex); |
| __ Ret(1); |
| } |
| |
| // 3a. Convert r0 to a string. |
| __ bind(&to_string); |
| { |
| ToStringStub stub(masm->isolate()); |
| __ TailCallStub(&stub); |
| } |
| |
| // 3b. Convert symbol in r0 to a string. |
| __ bind(&symbol_descriptive_string); |
| { |
| __ Push(r0); |
| __ TailCallRuntime(Runtime::kSymbolDescriptiveString, 1, 1); |
| } |
| } |
| |
| |
| // static |
| void Builtins::Generate_StringConstructor_ConstructStub(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : number of arguments |
| // -- r1 : constructor function |
| // -- r3 : original constructor |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 4] : arg[n] (zero based) |
| // -- sp[argc * 4] : receiver |
| // ----------------------------------- |
| |
| // 1. Load the first argument into r2 and get rid of the rest (including the |
| // receiver). |
| { |
| Label no_arguments, done; |
| __ sub(r0, r0, Operand(1), SetCC); |
| __ b(lo, &no_arguments); |
| __ ldr(r2, MemOperand(sp, r0, LSL, kPointerSizeLog2, PreIndex)); |
| __ Drop(2); |
| __ b(&done); |
| __ bind(&no_arguments); |
| __ LoadRoot(r2, Heap::kempty_stringRootIndex); |
| __ Drop(1); |
| __ bind(&done); |
| } |
| |
| // 2. Make sure r2 is a string. |
| { |
| Label convert, done_convert; |
| __ JumpIfSmi(r2, &convert); |
| __ CompareObjectType(r2, r4, r4, FIRST_NONSTRING_TYPE); |
| __ b(lo, &done_convert); |
| __ bind(&convert); |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| ToStringStub stub(masm->isolate()); |
| __ Push(r1, r3); |
| __ Move(r0, r2); |
| __ CallStub(&stub); |
| __ Move(r2, r0); |
| __ Pop(r1, r3); |
| } |
| __ bind(&done_convert); |
| } |
| |
| // 3. Allocate a JSValue wrapper for the string. |
| { |
| // ----------- S t a t e ------------- |
| // -- r2 : the first argument |
| // -- r1 : constructor function |
| // -- r3 : original constructor |
| // -- lr : return address |
| // ----------------------------------- |
| |
| Label allocate, done_allocate, rt_call; |
| |
| // Fall back to runtime if the original constructor and function differ. |
| __ cmp(r1, r3); |
| __ b(ne, &rt_call); |
| |
| __ Allocate(JSValue::kSize, r0, r3, r4, &allocate, TAG_OBJECT); |
| __ bind(&done_allocate); |
| |
| // Initialize the JSValue in r0. |
| __ LoadGlobalFunctionInitialMap(r1, r3, r4); |
| __ str(r3, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| __ LoadRoot(r3, Heap::kEmptyFixedArrayRootIndex); |
| __ str(r3, FieldMemOperand(r0, JSObject::kPropertiesOffset)); |
| __ str(r3, FieldMemOperand(r0, JSObject::kElementsOffset)); |
| __ str(r2, FieldMemOperand(r0, JSValue::kValueOffset)); |
| STATIC_ASSERT(JSValue::kSize == 4 * kPointerSize); |
| __ Ret(); |
| |
| // Fallback to the runtime to allocate in new space. |
| __ bind(&allocate); |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| __ Move(r3, Smi::FromInt(JSValue::kSize)); |
| __ Push(r1, r2, r3); |
| __ CallRuntime(Runtime::kAllocateInNewSpace, 1); |
| __ Pop(r1, r2); |
| } |
| __ b(&done_allocate); |
| |
| // Fallback to the runtime to create new object. |
| __ bind(&rt_call); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ Push(r1, r2); |
| __ Push(r1, r3); // constructor function, original constructor |
| __ CallRuntime(Runtime::kNewObject, 2); |
| __ Pop(r1, r2); |
| } |
| __ str(r2, FieldMemOperand(r0, JSValue::kValueOffset)); |
| __ Ret(); |
| } |
| } |
| |
| |
| static void CallRuntimePassFunction( |
| MacroAssembler* masm, Runtime::FunctionId function_id) { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| // Push a copy of the function onto the stack. |
| __ push(r1); |
| // Push function as parameter to the runtime call. |
| __ Push(r1); |
| |
| __ CallRuntime(function_id, 1); |
| // Restore receiver. |
| __ pop(r1); |
| } |
| |
| |
| static void GenerateTailCallToSharedCode(MacroAssembler* masm) { |
| __ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(r2, FieldMemOperand(r2, SharedFunctionInfo::kCodeOffset)); |
| __ add(r2, r2, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ Jump(r2); |
| } |
| |
| |
| static void GenerateTailCallToReturnedCode(MacroAssembler* masm) { |
| __ add(r0, r0, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ Jump(r0); |
| } |
| |
| |
| void Builtins::Generate_InOptimizationQueue(MacroAssembler* masm) { |
| // Checking whether the queued function is ready for install is optional, |
| // since we come across interrupts and stack checks elsewhere. However, |
| // not checking may delay installing ready functions, and always checking |
| // would be quite expensive. A good compromise is to first check against |
| // stack limit as a cue for an interrupt signal. |
| Label ok; |
| __ LoadRoot(ip, Heap::kStackLimitRootIndex); |
| __ cmp(sp, Operand(ip)); |
| __ b(hs, &ok); |
| |
| CallRuntimePassFunction(masm, Runtime::kTryInstallOptimizedCode); |
| GenerateTailCallToReturnedCode(masm); |
| |
| __ bind(&ok); |
| GenerateTailCallToSharedCode(masm); |
| } |
| |
| |
| static void Generate_JSConstructStubHelper(MacroAssembler* masm, |
| bool is_api_function) { |
| // ----------- S t a t e ------------- |
| // -- r0 : number of arguments |
| // -- r1 : constructor function |
| // -- r2 : allocation site or undefined |
| // -- r3 : original constructor |
| // -- lr : return address |
| // -- sp[...]: constructor arguments |
| // ----------------------------------- |
| |
| Isolate* isolate = masm->isolate(); |
| |
| // Enter a construct frame. |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::CONSTRUCT); |
| |
| // Preserve the incoming parameters on the stack. |
| __ AssertUndefinedOrAllocationSite(r2, r4); |
| __ push(r2); |
| __ SmiTag(r0); |
| __ push(r0); |
| __ push(r1); |
| __ push(r3); |
| |
| // Try to allocate the object without transitioning into C code. If any of |
| // the preconditions is not met, the code bails out to the runtime call. |
| Label rt_call, allocated; |
| if (FLAG_inline_new) { |
| ExternalReference debug_step_in_fp = |
| ExternalReference::debug_step_in_fp_address(isolate); |
| __ mov(r2, Operand(debug_step_in_fp)); |
| __ ldr(r2, MemOperand(r2)); |
| __ tst(r2, r2); |
| __ b(ne, &rt_call); |
| |
| // Fall back to runtime if the original constructor and function differ. |
| __ cmp(r1, r3); |
| __ b(ne, &rt_call); |
| |
| // Load the initial map and verify that it is in fact a map. |
| // r1: constructor function |
| __ ldr(r2, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| __ JumpIfSmi(r2, &rt_call); |
| __ CompareObjectType(r2, r5, r4, MAP_TYPE); |
| __ b(ne, &rt_call); |
| |
| // Check that the constructor is not constructing a JSFunction (see |
| // comments in Runtime_NewObject in runtime.cc). In which case the |
| // initial map's instance type would be JS_FUNCTION_TYPE. |
| // r1: constructor function |
| // r2: initial map |
| __ CompareInstanceType(r2, r5, JS_FUNCTION_TYPE); |
| __ b(eq, &rt_call); |
| |
| if (!is_api_function) { |
| Label allocate; |
| MemOperand bit_field3 = FieldMemOperand(r2, Map::kBitField3Offset); |
| // Check if slack tracking is enabled. |
| __ ldr(r4, bit_field3); |
| __ DecodeField<Map::Counter>(r3, r4); |
| __ cmp(r3, Operand(Map::kSlackTrackingCounterEnd)); |
| __ b(lt, &allocate); |
| // Decrease generous allocation count. |
| __ sub(r4, r4, Operand(1 << Map::Counter::kShift)); |
| __ str(r4, bit_field3); |
| __ cmp(r3, Operand(Map::kSlackTrackingCounterEnd)); |
| __ b(ne, &allocate); |
| |
| __ push(r1); |
| |
| __ Push(r2, r1); // r1 = constructor |
| __ CallRuntime(Runtime::kFinalizeInstanceSize, 1); |
| |
| __ pop(r2); |
| __ pop(r1); |
| |
| __ bind(&allocate); |
| } |
| |
| // Now allocate the JSObject on the heap. |
| // r1: constructor function |
| // r2: initial map |
| Label rt_call_reload_new_target; |
| __ ldrb(r3, FieldMemOperand(r2, Map::kInstanceSizeOffset)); |
| |
| __ Allocate(r3, r4, r5, r6, &rt_call_reload_new_target, 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. |
| // r1: constructor function |
| // r2: initial map |
| // r3: object size |
| // r4: JSObject (not tagged) |
| __ LoadRoot(r6, Heap::kEmptyFixedArrayRootIndex); |
| __ mov(r5, r4); |
| DCHECK_EQ(0 * kPointerSize, JSObject::kMapOffset); |
| __ str(r2, MemOperand(r5, kPointerSize, PostIndex)); |
| DCHECK_EQ(1 * kPointerSize, JSObject::kPropertiesOffset); |
| __ str(r6, MemOperand(r5, kPointerSize, PostIndex)); |
| DCHECK_EQ(2 * kPointerSize, JSObject::kElementsOffset); |
| __ str(r6, MemOperand(r5, kPointerSize, PostIndex)); |
| |
| // Fill all the in-object properties with the appropriate filler. |
| // r1: constructor function |
| // r2: initial map |
| // r3: object size |
| // r4: JSObject (not tagged) |
| // r5: First in-object property of JSObject (not tagged) |
| DCHECK_EQ(3 * kPointerSize, JSObject::kHeaderSize); |
| __ LoadRoot(r6, Heap::kUndefinedValueRootIndex); |
| |
| if (!is_api_function) { |
| Label no_inobject_slack_tracking; |
| |
| // Check if slack tracking is enabled. |
| __ ldr(ip, FieldMemOperand(r2, Map::kBitField3Offset)); |
| __ DecodeField<Map::Counter>(ip); |
| __ cmp(ip, Operand(Map::kSlackTrackingCounterEnd)); |
| __ b(lt, &no_inobject_slack_tracking); |
| |
| // Allocate object with a slack. |
| __ ldr(r0, FieldMemOperand(r2, Map::kInstanceSizesOffset)); |
| __ Ubfx(r0, r0, Map::kInObjectPropertiesOrConstructorFunctionIndexByte * |
| kBitsPerByte, |
| kBitsPerByte); |
| __ ldr(r2, FieldMemOperand(r2, Map::kInstanceAttributesOffset)); |
| __ Ubfx(r2, r2, Map::kUnusedPropertyFieldsByte * kBitsPerByte, |
| kBitsPerByte); |
| __ sub(r0, r0, Operand(r2)); |
| __ add(r0, r5, Operand(r0, LSL, kPointerSizeLog2)); |
| // r0: offset of first field after pre-allocated fields |
| if (FLAG_debug_code) { |
| __ add(ip, r4, Operand(r3, LSL, kPointerSizeLog2)); // End of object. |
| __ cmp(r0, ip); |
| __ Assert(le, kUnexpectedNumberOfPreAllocatedPropertyFields); |
| } |
| __ InitializeFieldsWithFiller(r5, r0, r6); |
| // To allow for truncation. |
| __ LoadRoot(r6, Heap::kOnePointerFillerMapRootIndex); |
| // Fill the remaining fields with one pointer filler map. |
| |
| __ bind(&no_inobject_slack_tracking); |
| } |
| |
| __ add(r0, r4, Operand(r3, LSL, kPointerSizeLog2)); // End of object. |
| __ InitializeFieldsWithFiller(r5, r0, r6); |
| |
| // Add the object tag to make the JSObject real, so that we can continue |
| // and jump into the continuation code at any time from now on. |
| __ add(r4, r4, Operand(kHeapObjectTag)); |
| |
| // Continue with JSObject being successfully allocated |
| // r4: JSObject |
| __ jmp(&allocated); |
| |
| // Reload the original constructor and fall-through. |
| __ bind(&rt_call_reload_new_target); |
| __ ldr(r3, MemOperand(sp, 0 * kPointerSize)); |
| } |
| |
| // Allocate the new receiver object using the runtime call. |
| // r1: constructor function |
| // r3: original constructor |
| __ bind(&rt_call); |
| |
| __ push(r1); // constructor function |
| __ push(r3); // original constructor |
| __ CallRuntime(Runtime::kNewObject, 2); |
| __ mov(r4, r0); |
| |
| // Receiver for constructor call allocated. |
| // r4: JSObject |
| __ bind(&allocated); |
| |
| // Restore the parameters. |
| __ pop(r3); |
| __ pop(r1); |
| |
| // Retrieve smi-tagged arguments count from the stack. |
| __ ldr(r0, MemOperand(sp)); |
| __ SmiUntag(r0); |
| |
| // Push new.target onto the construct frame. This is stored just below the |
| // receiver on the stack. |
| __ push(r3); |
| __ push(r4); |
| __ push(r4); |
| |
| // Set up pointer to last argument. |
| __ add(r2, fp, Operand(StandardFrameConstants::kCallerSPOffset)); |
| |
| // Copy arguments and receiver to the expression stack. |
| // r0: number of arguments |
| // r1: constructor function |
| // r2: address of last argument (caller sp) |
| // r3: number of arguments (smi-tagged) |
| // sp[0]: receiver |
| // sp[1]: receiver |
| // sp[2]: new.target |
| // sp[3]: number of arguments (smi-tagged) |
| Label loop, entry; |
| __ SmiTag(r3, r0); |
| __ b(&entry); |
| __ bind(&loop); |
| __ ldr(ip, MemOperand(r2, r3, LSL, kPointerSizeLog2 - 1)); |
| __ push(ip); |
| __ bind(&entry); |
| __ sub(r3, r3, Operand(2), SetCC); |
| __ b(ge, &loop); |
| |
| // Call the function. |
| // r0: number of arguments |
| // r1: constructor function |
| if (is_api_function) { |
| __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| Handle<Code> code = |
| masm->isolate()->builtins()->HandleApiCallConstruct(); |
| __ Call(code, RelocInfo::CODE_TARGET); |
| } else { |
| ParameterCount actual(r0); |
| __ InvokeFunction(r1, actual, CALL_FUNCTION, NullCallWrapper()); |
| } |
| |
| // Store offset of return address for deoptimizer. |
| if (!is_api_function) { |
| masm->isolate()->heap()->SetConstructStubDeoptPCOffset(masm->pc_offset()); |
| } |
| |
| // Restore context from the frame. |
| // r0: result |
| // sp[0]: receiver |
| // sp[1]: new.target |
| // sp[2]: number of arguments (smi-tagged) |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| |
| // If the result is an object (in the ECMA sense), we should get rid |
| // of the receiver and use the result; see ECMA-262 section 13.2.2-7 |
| // on page 74. |
| Label use_receiver, exit; |
| |
| // If the result is a smi, it is *not* an object in the ECMA sense. |
| // r0: result |
| // sp[0]: receiver |
| // sp[1]: new.target |
| // sp[2]: number of arguments (smi-tagged) |
| __ JumpIfSmi(r0, &use_receiver); |
| |
| // If the type of the result (stored in its map) is less than |
| // FIRST_SPEC_OBJECT_TYPE, it is not an object in the ECMA sense. |
| __ CompareObjectType(r0, r1, r3, FIRST_SPEC_OBJECT_TYPE); |
| __ b(ge, &exit); |
| |
| // Throw away the result of the constructor invocation and use the |
| // on-stack receiver as the result. |
| __ bind(&use_receiver); |
| __ ldr(r0, MemOperand(sp)); |
| |
| // Remove receiver from the stack, remove caller arguments, and |
| // return. |
| __ bind(&exit); |
| // r0: result |
| // sp[0]: receiver (newly allocated object) |
| // sp[1]: new.target (original constructor) |
| // sp[2]: number of arguments (smi-tagged) |
| __ ldr(r1, MemOperand(sp, 2 * kPointerSize)); |
| |
| // Leave construct frame. |
| } |
| |
| __ add(sp, sp, Operand(r1, LSL, kPointerSizeLog2 - 1)); |
| __ add(sp, sp, Operand(kPointerSize)); |
| __ IncrementCounter(isolate->counters()->constructed_objects(), 1, r1, r2); |
| __ Jump(lr); |
| } |
| |
| |
| void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) { |
| Generate_JSConstructStubHelper(masm, false); |
| } |
| |
| |
| void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) { |
| Generate_JSConstructStubHelper(masm, true); |
| } |
| |
| |
| void Builtins::Generate_JSConstructStubForDerived(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : number of arguments |
| // -- r1 : constructor function |
| // -- r2 : allocation site or undefined |
| // -- r3 : original constructor |
| // -- lr : return address |
| // -- sp[...]: constructor arguments |
| // ----------------------------------- |
| |
| { |
| FrameScope frame_scope(masm, StackFrame::CONSTRUCT); |
| |
| __ AssertUndefinedOrAllocationSite(r2, r4); |
| __ push(r2); |
| |
| __ mov(r4, r0); |
| __ SmiTag(r4); |
| __ push(r4); // Smi-tagged arguments count. |
| |
| // Push new.target. |
| __ push(r3); |
| |
| // receiver is the hole. |
| __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| __ push(ip); |
| |
| // Set up pointer to last argument. |
| __ add(r2, fp, Operand(StandardFrameConstants::kCallerSPOffset)); |
| |
| // Copy arguments and receiver to the expression stack. |
| // r0: number of arguments |
| // r1: constructor function |
| // r2: address of last argument (caller sp) |
| // r4: number of arguments (smi-tagged) |
| // sp[0]: receiver |
| // sp[1]: new.target |
| // sp[2]: number of arguments (smi-tagged) |
| Label loop, entry; |
| __ b(&entry); |
| __ bind(&loop); |
| __ ldr(ip, MemOperand(r2, r4, LSL, kPointerSizeLog2 - 1)); |
| __ push(ip); |
| __ bind(&entry); |
| __ sub(r4, r4, Operand(2), SetCC); |
| __ b(ge, &loop); |
| |
| // Handle step in. |
| Label skip_step_in; |
| ExternalReference debug_step_in_fp = |
| ExternalReference::debug_step_in_fp_address(masm->isolate()); |
| __ mov(r2, Operand(debug_step_in_fp)); |
| __ ldr(r2, MemOperand(r2)); |
| __ tst(r2, r2); |
| __ b(eq, &skip_step_in); |
| |
| __ Push(r0); |
| __ Push(r1); |
| __ Push(r1); |
| __ CallRuntime(Runtime::kHandleStepInForDerivedConstructors, 1); |
| __ Pop(r1); |
| __ Pop(r0); |
| |
| __ bind(&skip_step_in); |
| |
| // Call the function. |
| // r0: number of arguments |
| // r1: constructor function |
| ParameterCount actual(r0); |
| __ InvokeFunction(r1, actual, CALL_FUNCTION, NullCallWrapper()); |
| |
| // Restore context from the frame. |
| // r0: result |
| // sp[0]: number of arguments (smi-tagged) |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| // Get arguments count, skipping over new.target. |
| __ ldr(r1, MemOperand(sp, kPointerSize)); |
| |
| // Leave construct frame. |
| } |
| |
| __ add(sp, sp, Operand(r1, LSL, kPointerSizeLog2 - 1)); |
| __ add(sp, sp, Operand(kPointerSize)); |
| __ Jump(lr); |
| } |
| |
| |
| enum IsTagged { kArgcIsSmiTagged, kArgcIsUntaggedInt }; |
| |
| |
| // Clobbers r2; preserves all other registers. |
| static void Generate_CheckStackOverflow(MacroAssembler* masm, Register argc, |
| IsTagged argc_is_tagged) { |
| // Check the stack for overflow. We are not trying to catch |
| // interruptions (e.g. debug break and preemption) here, so the "real stack |
| // limit" is checked. |
| Label okay; |
| __ LoadRoot(r2, Heap::kRealStackLimitRootIndex); |
| // Make r2 the space we have left. The stack might already be overflowed |
| // here which will cause r2 to become negative. |
| __ sub(r2, sp, r2); |
| // Check if the arguments will overflow the stack. |
| if (argc_is_tagged == kArgcIsSmiTagged) { |
| __ cmp(r2, Operand::PointerOffsetFromSmiKey(argc)); |
| } else { |
| DCHECK(argc_is_tagged == kArgcIsUntaggedInt); |
| __ cmp(r2, Operand(argc, LSL, kPointerSizeLog2)); |
| } |
| __ b(gt, &okay); // Signed comparison. |
| |
| // Out of stack space. |
| __ CallRuntime(Runtime::kThrowStackOverflow, 0); |
| |
| __ bind(&okay); |
| } |
| |
| |
| static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm, |
| bool is_construct) { |
| // Called from Generate_JS_Entry |
| // r0: new.target |
| // r1: function |
| // r2: receiver |
| // r3: argc |
| // r4: argv |
| // r5-r6, r8 (if !FLAG_enable_embedded_constant_pool) and cp may be clobbered |
| ProfileEntryHookStub::MaybeCallEntryHook(masm); |
| |
| // Clear the context before we push it when entering the internal frame. |
| __ mov(cp, Operand::Zero()); |
| |
| // Enter an internal frame. |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| |
| // Setup the context (we need to use the caller context from the isolate). |
| ExternalReference context_address(Isolate::kContextAddress, |
| masm->isolate()); |
| __ mov(cp, Operand(context_address)); |
| __ ldr(cp, MemOperand(cp)); |
| |
| __ InitializeRootRegister(); |
| |
| // Push the function and the receiver onto the stack. |
| __ Push(r1, r2); |
| |
| // Check if we have enough stack space to push all arguments. |
| // Clobbers r2. |
| Generate_CheckStackOverflow(masm, r3, kArgcIsUntaggedInt); |
| |
| // Remember new.target. |
| __ mov(r5, r0); |
| |
| // Copy arguments to the stack in a loop. |
| // r1: function |
| // r3: argc |
| // r4: argv, i.e. points to first arg |
| Label loop, entry; |
| __ add(r2, r4, Operand(r3, LSL, kPointerSizeLog2)); |
| // r2 points past last arg. |
| __ b(&entry); |
| __ bind(&loop); |
| __ ldr(r0, MemOperand(r4, kPointerSize, PostIndex)); // read next parameter |
| __ ldr(r0, MemOperand(r0)); // dereference handle |
| __ push(r0); // push parameter |
| __ bind(&entry); |
| __ cmp(r4, r2); |
| __ b(ne, &loop); |
| |
| // Setup new.target and argc. |
| __ mov(r0, Operand(r3)); |
| __ mov(r3, Operand(r5)); |
| |
| // Initialize all JavaScript callee-saved registers, since they will be seen |
| // by the garbage collector as part of handlers. |
| __ LoadRoot(r4, Heap::kUndefinedValueRootIndex); |
| __ mov(r5, Operand(r4)); |
| __ mov(r6, Operand(r4)); |
| if (!FLAG_enable_embedded_constant_pool) { |
| __ mov(r8, Operand(r4)); |
| } |
| if (kR9Available == 1) { |
| __ mov(r9, Operand(r4)); |
| } |
| |
| // Invoke the code. |
| Handle<Code> builtin = is_construct |
| ? masm->isolate()->builtins()->Construct() |
| : masm->isolate()->builtins()->Call(); |
| __ Call(builtin, RelocInfo::CODE_TARGET); |
| |
| // Exit the JS frame and remove the parameters (except function), and |
| // return. |
| // Respect ABI stack constraint. |
| } |
| __ Jump(lr); |
| |
| // r0: result |
| } |
| |
| |
| void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) { |
| Generate_JSEntryTrampolineHelper(masm, false); |
| } |
| |
| |
| void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) { |
| Generate_JSEntryTrampolineHelper(masm, true); |
| } |
| |
| |
| // Generate code for entering a JS function with the interpreter. |
| // On entry to the function the receiver and arguments have been pushed on the |
| // stack left to right. The actual argument count matches the formal parameter |
| // count expected by the function. |
| // |
| // The live registers are: |
| // o r1: the JS function object being called. |
| // o cp: our context |
| // o pp: the caller's constant pool pointer (if enabled) |
| // o fp: the caller's frame pointer |
| // o sp: stack pointer |
| // o lr: return address |
| // |
| // The function builds a JS frame. Please see JavaScriptFrameConstants in |
| // frames-arm.h for its layout. |
| // TODO(rmcilroy): We will need to include the current bytecode pointer in the |
| // frame. |
| void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) { |
| // Open a frame scope to indicate that there is a frame on the stack. The |
| // MANUAL indicates that the scope shouldn't actually generate code to set up |
| // the frame (that is done below). |
| FrameScope frame_scope(masm, StackFrame::MANUAL); |
| __ PushFixedFrame(r1); |
| __ add(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp)); |
| |
| // Get the bytecode array from the function object and load the pointer to the |
| // first entry into kInterpreterBytecodeRegister. |
| __ ldr(r0, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(kInterpreterBytecodeArrayRegister, |
| FieldMemOperand(r0, SharedFunctionInfo::kFunctionDataOffset)); |
| |
| if (FLAG_debug_code) { |
| // Check function data field is actually a BytecodeArray object. |
| __ SmiTst(kInterpreterBytecodeArrayRegister); |
| __ Assert(ne, kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry); |
| __ CompareObjectType(kInterpreterBytecodeArrayRegister, r0, no_reg, |
| BYTECODE_ARRAY_TYPE); |
| __ Assert(eq, kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry); |
| } |
| |
| // Allocate the local and temporary register file on the stack. |
| { |
| // Load frame size from the BytecodeArray object. |
| __ ldr(r4, FieldMemOperand(kInterpreterBytecodeArrayRegister, |
| BytecodeArray::kFrameSizeOffset)); |
| |
| // Do a stack check to ensure we don't go over the limit. |
| Label ok; |
| __ sub(r9, sp, Operand(r4)); |
| __ LoadRoot(r2, Heap::kRealStackLimitRootIndex); |
| __ cmp(r9, Operand(r2)); |
| __ b(hs, &ok); |
| __ CallRuntime(Runtime::kThrowStackOverflow, 0); |
| __ bind(&ok); |
| |
| // If ok, push undefined as the initial value for all register file entries. |
| Label loop_header; |
| Label loop_check; |
| __ LoadRoot(r9, Heap::kUndefinedValueRootIndex); |
| __ b(&loop_check, al); |
| __ bind(&loop_header); |
| // TODO(rmcilroy): Consider doing more than one push per loop iteration. |
| __ push(r9); |
| // Continue loop if not done. |
| __ bind(&loop_check); |
| __ sub(r4, r4, Operand(kPointerSize), SetCC); |
| __ b(&loop_header, ge); |
| } |
| |
| // TODO(rmcilroy): List of things not currently dealt with here but done in |
| // fullcodegen's prologue: |
| // - Support profiler (specifically profiling_counter). |
| // - Call ProfileEntryHookStub when isolate has a function_entry_hook. |
| // - Allow simulator stop operations if FLAG_stop_at is set. |
| // - Deal with sloppy mode functions which need to replace the |
| // receiver with the global proxy when called as functions (without an |
| // explicit receiver object). |
| // - Code aging of the BytecodeArray object. |
| |
| // Perform stack guard check. |
| { |
| Label ok; |
| __ LoadRoot(ip, Heap::kStackLimitRootIndex); |
| __ cmp(sp, Operand(ip)); |
| __ b(hs, &ok); |
| __ push(kInterpreterBytecodeArrayRegister); |
| __ CallRuntime(Runtime::kStackGuard, 0); |
| __ pop(kInterpreterBytecodeArrayRegister); |
| __ bind(&ok); |
| } |
| |
| // Load accumulator, register file, bytecode offset, dispatch table into |
| // registers. |
| __ LoadRoot(kInterpreterAccumulatorRegister, Heap::kUndefinedValueRootIndex); |
| __ sub(kInterpreterRegisterFileRegister, fp, |
| Operand(kPointerSize + StandardFrameConstants::kFixedFrameSizeFromFp)); |
| __ mov(kInterpreterBytecodeOffsetRegister, |
| Operand(BytecodeArray::kHeaderSize - kHeapObjectTag)); |
| __ LoadRoot(kInterpreterDispatchTableRegister, |
| Heap::kInterpreterTableRootIndex); |
| __ add(kInterpreterDispatchTableRegister, kInterpreterDispatchTableRegister, |
| Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| |
| // Dispatch to the first bytecode handler for the function. |
| __ ldrb(r1, MemOperand(kInterpreterBytecodeArrayRegister, |
| kInterpreterBytecodeOffsetRegister)); |
| __ ldr(ip, MemOperand(kInterpreterDispatchTableRegister, r1, LSL, |
| kPointerSizeLog2)); |
| // TODO(rmcilroy): Make dispatch table point to code entrys to avoid untagging |
| // and header removal. |
| __ add(ip, ip, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ Call(ip); |
| } |
| |
| |
| void Builtins::Generate_InterpreterExitTrampoline(MacroAssembler* masm) { |
| // TODO(rmcilroy): List of things not currently dealt with here but done in |
| // fullcodegen's EmitReturnSequence. |
| // - Supporting FLAG_trace for Runtime::TraceExit. |
| // - Support profiler (specifically decrementing profiling_counter |
| // appropriately and calling out to HandleInterrupts if necessary). |
| |
| // The return value is in accumulator, which is already in r0. |
| |
| // Leave the frame (also dropping the register file). |
| __ LeaveFrame(StackFrame::JAVA_SCRIPT); |
| |
| // Drop receiver + arguments and return. |
| __ ldr(ip, FieldMemOperand(kInterpreterBytecodeArrayRegister, |
| BytecodeArray::kParameterSizeOffset)); |
| __ add(sp, sp, ip, LeaveCC); |
| __ Jump(lr); |
| } |
| |
| |
| static void Generate_InterpreterPushArgs(MacroAssembler* masm, Register index, |
| Register limit, Register scratch) { |
| Label loop_header, loop_check; |
| __ b(al, &loop_check); |
| __ bind(&loop_header); |
| __ ldr(scratch, MemOperand(index, -kPointerSize, PostIndex)); |
| __ push(scratch); |
| __ bind(&loop_check); |
| __ cmp(index, limit); |
| __ b(gt, &loop_header); |
| } |
| |
| |
| // static |
| void Builtins::Generate_InterpreterPushArgsAndCall(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r2 : the address of the first argument to be pushed. Subsequent |
| // arguments should be consecutive above this, in the same order as |
| // they are to be pushed onto the stack. |
| // -- r1 : the target to call (can be any Object). |
| // ----------------------------------- |
| |
| // Find the address of the last argument. |
| __ add(r3, r0, Operand(1)); // Add one for receiver. |
| __ mov(r3, Operand(r3, LSL, kPointerSizeLog2)); |
| __ sub(r3, r2, r3); |
| |
| // Push the arguments. |
| Generate_InterpreterPushArgs(masm, r2, r3, r4); |
| |
| // Call the target. |
| __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET); |
| } |
| |
| |
| // static |
| void Builtins::Generate_InterpreterPushArgsAndConstruct(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : argument count (not including receiver) |
| // -- r3 : original constructor |
| // -- r1 : constructor to call |
| // -- r2 : address of the first argument |
| // ----------------------------------- |
| |
| // Find the address of the last argument. |
| __ mov(r4, Operand(r0, LSL, kPointerSizeLog2)); |
| __ sub(r4, r2, r4); |
| |
| // Push a slot for the receiver to be constructed. |
| __ push(r0); |
| |
| // Push the arguments. |
| Generate_InterpreterPushArgs(masm, r2, r4, r5); |
| |
| // Call the constructor with r0, r1, and r3 unmodified. |
| __ Jump(masm->isolate()->builtins()->Construct(), RelocInfo::CONSTRUCT_CALL); |
| } |
| |
| |
| void Builtins::Generate_CompileLazy(MacroAssembler* masm) { |
| CallRuntimePassFunction(masm, Runtime::kCompileLazy); |
| GenerateTailCallToReturnedCode(masm); |
| } |
| |
| |
| static void CallCompileOptimized(MacroAssembler* masm, bool concurrent) { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| // Push a copy of the function onto the stack. |
| __ push(r1); |
| // Push function as parameter to the runtime call. |
| __ Push(r1); |
| // Whether to compile in a background thread. |
| __ LoadRoot( |
| ip, concurrent ? Heap::kTrueValueRootIndex : Heap::kFalseValueRootIndex); |
| __ push(ip); |
| |
| __ CallRuntime(Runtime::kCompileOptimized, 2); |
| // Restore receiver. |
| __ pop(r1); |
| } |
| |
| |
| void Builtins::Generate_CompileOptimized(MacroAssembler* masm) { |
| CallCompileOptimized(masm, false); |
| GenerateTailCallToReturnedCode(masm); |
| } |
| |
| |
| void Builtins::Generate_CompileOptimizedConcurrent(MacroAssembler* masm) { |
| CallCompileOptimized(masm, true); |
| GenerateTailCallToReturnedCode(masm); |
| } |
| |
| |
| static void GenerateMakeCodeYoungAgainCommon(MacroAssembler* masm) { |
| // For now, we are relying on the fact that make_code_young doesn't do any |
| // garbage collection which allows us to save/restore the registers without |
| // worrying about which of them contain pointers. We also don't build an |
| // internal frame to make the code faster, since we shouldn't have to do stack |
| // crawls in MakeCodeYoung. This seems a bit fragile. |
| |
| // The following registers must be saved and restored when calling through to |
| // the runtime: |
| // r0 - contains return address (beginning of patch sequence) |
| // r1 - isolate |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ stm(db_w, sp, r0.bit() | r1.bit() | fp.bit() | lr.bit()); |
| __ PrepareCallCFunction(2, 0, r2); |
| __ mov(r1, Operand(ExternalReference::isolate_address(masm->isolate()))); |
| __ CallCFunction( |
| ExternalReference::get_make_code_young_function(masm->isolate()), 2); |
| __ ldm(ia_w, sp, r0.bit() | r1.bit() | fp.bit() | lr.bit()); |
| __ mov(pc, r0); |
| } |
| |
| #define DEFINE_CODE_AGE_BUILTIN_GENERATOR(C) \ |
| void Builtins::Generate_Make##C##CodeYoungAgainEvenMarking( \ |
| MacroAssembler* masm) { \ |
| GenerateMakeCodeYoungAgainCommon(masm); \ |
| } \ |
| void Builtins::Generate_Make##C##CodeYoungAgainOddMarking( \ |
| MacroAssembler* masm) { \ |
| GenerateMakeCodeYoungAgainCommon(masm); \ |
| } |
| CODE_AGE_LIST(DEFINE_CODE_AGE_BUILTIN_GENERATOR) |
| #undef DEFINE_CODE_AGE_BUILTIN_GENERATOR |
| |
| |
| void Builtins::Generate_MarkCodeAsExecutedOnce(MacroAssembler* masm) { |
| // For now, as in GenerateMakeCodeYoungAgainCommon, we are relying on the fact |
| // that make_code_young doesn't do any garbage collection which allows us to |
| // save/restore the registers without worrying about which of them contain |
| // pointers. |
| |
| // The following registers must be saved and restored when calling through to |
| // the runtime: |
| // r0 - contains return address (beginning of patch sequence) |
| // r1 - isolate |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ stm(db_w, sp, r0.bit() | r1.bit() | fp.bit() | lr.bit()); |
| __ PrepareCallCFunction(2, 0, r2); |
| __ mov(r1, Operand(ExternalReference::isolate_address(masm->isolate()))); |
| __ CallCFunction(ExternalReference::get_mark_code_as_executed_function( |
| masm->isolate()), 2); |
| __ ldm(ia_w, sp, r0.bit() | r1.bit() | fp.bit() | lr.bit()); |
| |
| // Perform prologue operations usually performed by the young code stub. |
| __ PushFixedFrame(r1); |
| __ add(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp)); |
| |
| // Jump to point after the code-age stub. |
| __ add(r0, r0, Operand(kNoCodeAgeSequenceLength)); |
| __ mov(pc, r0); |
| } |
| |
| |
| void Builtins::Generate_MarkCodeAsExecutedTwice(MacroAssembler* masm) { |
| GenerateMakeCodeYoungAgainCommon(masm); |
| } |
| |
| |
| void Builtins::Generate_MarkCodeAsToBeExecutedOnce(MacroAssembler* masm) { |
| Generate_MarkCodeAsExecutedOnce(masm); |
| } |
| |
| |
| static void Generate_NotifyStubFailureHelper(MacroAssembler* masm, |
| SaveFPRegsMode save_doubles) { |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| |
| // Preserve registers across notification, this is important for compiled |
| // stubs that tail call the runtime on deopts passing their parameters in |
| // registers. |
| __ stm(db_w, sp, kJSCallerSaved | kCalleeSaved); |
| // Pass the function and deoptimization type to the runtime system. |
| __ CallRuntime(Runtime::kNotifyStubFailure, 0, save_doubles); |
| __ ldm(ia_w, sp, kJSCallerSaved | kCalleeSaved); |
| } |
| |
| __ add(sp, sp, Operand(kPointerSize)); // Ignore state |
| __ mov(pc, lr); // Jump to miss handler |
| } |
| |
| |
| void Builtins::Generate_NotifyStubFailure(MacroAssembler* masm) { |
| Generate_NotifyStubFailureHelper(masm, kDontSaveFPRegs); |
| } |
| |
| |
| void Builtins::Generate_NotifyStubFailureSaveDoubles(MacroAssembler* masm) { |
| Generate_NotifyStubFailureHelper(masm, kSaveFPRegs); |
| } |
| |
| |
| static void Generate_NotifyDeoptimizedHelper(MacroAssembler* masm, |
| Deoptimizer::BailoutType type) { |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| // Pass the function and deoptimization type to the runtime system. |
| __ mov(r0, Operand(Smi::FromInt(static_cast<int>(type)))); |
| __ push(r0); |
| __ CallRuntime(Runtime::kNotifyDeoptimized, 1); |
| } |
| |
| // Get the full codegen state from the stack and untag it -> r6. |
| __ ldr(r6, MemOperand(sp, 0 * kPointerSize)); |
| __ SmiUntag(r6); |
| // Switch on the state. |
| Label with_tos_register, unknown_state; |
| __ cmp(r6, Operand(FullCodeGenerator::NO_REGISTERS)); |
| __ b(ne, &with_tos_register); |
| __ add(sp, sp, Operand(1 * kPointerSize)); // Remove state. |
| __ Ret(); |
| |
| __ bind(&with_tos_register); |
| __ ldr(r0, MemOperand(sp, 1 * kPointerSize)); |
| __ cmp(r6, Operand(FullCodeGenerator::TOS_REG)); |
| __ b(ne, &unknown_state); |
| __ add(sp, sp, Operand(2 * kPointerSize)); // Remove state. |
| __ Ret(); |
| |
| __ bind(&unknown_state); |
| __ stop("no cases left"); |
| } |
| |
| |
| void Builtins::Generate_NotifyDeoptimized(MacroAssembler* masm) { |
| Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::EAGER); |
| } |
| |
| |
| void Builtins::Generate_NotifySoftDeoptimized(MacroAssembler* masm) { |
| Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::SOFT); |
| } |
| |
| |
| void Builtins::Generate_NotifyLazyDeoptimized(MacroAssembler* masm) { |
| Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::LAZY); |
| } |
| |
| |
| void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) { |
| // Lookup the function in the JavaScript frame. |
| __ ldr(r0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| // Pass function as argument. |
| __ push(r0); |
| __ CallRuntime(Runtime::kCompileForOnStackReplacement, 1); |
| } |
| |
| // If the code object is null, just return to the unoptimized code. |
| Label skip; |
| __ cmp(r0, Operand(Smi::FromInt(0))); |
| __ b(ne, &skip); |
| __ Ret(); |
| |
| __ bind(&skip); |
| |
| // Load deoptimization data from the code object. |
| // <deopt_data> = <code>[#deoptimization_data_offset] |
| __ ldr(r1, FieldMemOperand(r0, Code::kDeoptimizationDataOffset)); |
| |
| { ConstantPoolUnavailableScope constant_pool_unavailable(masm); |
| __ add(r0, r0, Operand(Code::kHeaderSize - kHeapObjectTag)); // Code start |
| |
| if (FLAG_enable_embedded_constant_pool) { |
| __ LoadConstantPoolPointerRegisterFromCodeTargetAddress(r0); |
| } |
| |
| // Load the OSR entrypoint offset from the deoptimization data. |
| // <osr_offset> = <deopt_data>[#header_size + #osr_pc_offset] |
| __ ldr(r1, FieldMemOperand(r1, FixedArray::OffsetOfElementAt( |
| DeoptimizationInputData::kOsrPcOffsetIndex))); |
| |
| // Compute the target address = code start + osr_offset |
| __ add(lr, r0, Operand::SmiUntag(r1)); |
| |
| // And "return" to the OSR entry point of the function. |
| __ Ret(); |
| } |
| } |
| |
| |
| void Builtins::Generate_OsrAfterStackCheck(MacroAssembler* masm) { |
| // We check the stack limit as indicator that recompilation might be done. |
| Label ok; |
| __ LoadRoot(ip, Heap::kStackLimitRootIndex); |
| __ cmp(sp, Operand(ip)); |
| __ b(hs, &ok); |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| __ CallRuntime(Runtime::kStackGuard, 0); |
| } |
| __ Jump(masm->isolate()->builtins()->OnStackReplacement(), |
| RelocInfo::CODE_TARGET); |
| |
| __ bind(&ok); |
| __ Ret(); |
| } |
| |
| |
| // static |
| void Builtins::Generate_FunctionCall(MacroAssembler* masm) { |
| // 1. Make sure we have at least one argument. |
| // r0: actual number of arguments |
| { |
| Label done; |
| __ cmp(r0, Operand::Zero()); |
| __ b(ne, &done); |
| __ PushRoot(Heap::kUndefinedValueRootIndex); |
| __ add(r0, r0, Operand(1)); |
| __ bind(&done); |
| } |
| |
| // 2. Get the callable to call (passed as receiver) from the stack. |
| // r0: actual number of arguments |
| __ ldr(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
| |
| // 3. Shift arguments and return address one slot down on the stack |
| // (overwriting the original receiver). Adjust argument count to make |
| // the original first argument the new receiver. |
| // r0: actual number of arguments |
| // r1: callable |
| { |
| Label loop; |
| // Calculate the copy start address (destination). Copy end address is sp. |
| __ add(r2, sp, Operand(r0, LSL, kPointerSizeLog2)); |
| |
| __ bind(&loop); |
| __ ldr(ip, MemOperand(r2, -kPointerSize)); |
| __ str(ip, MemOperand(r2)); |
| __ sub(r2, r2, Operand(kPointerSize)); |
| __ cmp(r2, sp); |
| __ b(ne, &loop); |
| // Adjust the actual number of arguments and remove the top element |
| // (which is a copy of the last argument). |
| __ sub(r0, r0, Operand(1)); |
| __ pop(); |
| } |
| |
| // 4. Call the callable. |
| __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET); |
| } |
| |
| |
| static void Generate_PushAppliedArguments(MacroAssembler* masm, |
| const int vectorOffset, |
| const int argumentsOffset, |
| const int indexOffset, |
| const int limitOffset) { |
| Label entry, loop; |
| Register receiver = LoadDescriptor::ReceiverRegister(); |
| Register key = LoadDescriptor::NameRegister(); |
| Register slot = LoadDescriptor::SlotRegister(); |
| Register vector = LoadWithVectorDescriptor::VectorRegister(); |
| |
| __ ldr(key, MemOperand(fp, indexOffset)); |
| __ b(&entry); |
| |
| // Load the current argument from the arguments array. |
| __ bind(&loop); |
| __ ldr(receiver, MemOperand(fp, argumentsOffset)); |
| |
| // Use inline caching to speed up access to arguments. |
| int slot_index = TypeFeedbackVector::PushAppliedArgumentsIndex(); |
| __ mov(slot, Operand(Smi::FromInt(slot_index))); |
| __ ldr(vector, MemOperand(fp, vectorOffset)); |
| Handle<Code> ic = |
| KeyedLoadICStub(masm->isolate(), LoadICState(kNoExtraICState)).GetCode(); |
| __ Call(ic, RelocInfo::CODE_TARGET); |
| |
| // Push the nth argument. |
| __ push(r0); |
| |
| __ ldr(key, MemOperand(fp, indexOffset)); |
| __ add(key, key, Operand(1 << kSmiTagSize)); |
| __ str(key, MemOperand(fp, indexOffset)); |
| |
| // Test if the copy loop has finished copying all the elements from the |
| // arguments object. |
| __ bind(&entry); |
| __ ldr(r1, MemOperand(fp, limitOffset)); |
| __ cmp(key, r1); |
| __ b(ne, &loop); |
| |
| // On exit, the pushed arguments count is in r0, untagged |
| __ mov(r0, key); |
| __ SmiUntag(r0); |
| } |
| |
| |
| // Used by FunctionApply and ReflectApply |
| static void Generate_ApplyHelper(MacroAssembler* masm, bool targetIsArgument) { |
| const int kFormalParameters = targetIsArgument ? 3 : 2; |
| const int kStackSize = kFormalParameters + 1; |
| |
| { |
| FrameAndConstantPoolScope frame_scope(masm, StackFrame::INTERNAL); |
| const int kArgumentsOffset = kFPOnStackSize + kPCOnStackSize; |
| const int kReceiverOffset = kArgumentsOffset + kPointerSize; |
| const int kFunctionOffset = kReceiverOffset + kPointerSize; |
| const int kVectorOffset = |
| InternalFrameConstants::kCodeOffset - 1 * kPointerSize; |
| |
| // Push the vector. |
| __ ldr(r1, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(r1, FieldMemOperand(r1, SharedFunctionInfo::kFeedbackVectorOffset)); |
| __ Push(r1); |
| |
| __ ldr(r0, MemOperand(fp, kFunctionOffset)); // get the function |
| __ ldr(r1, MemOperand(fp, kArgumentsOffset)); // get the args array |
| __ Push(r0, r1); |
| if (targetIsArgument) { |
| __ InvokeBuiltin(Context::REFLECT_APPLY_PREPARE_BUILTIN_INDEX, |
| CALL_FUNCTION); |
| } else { |
| __ InvokeBuiltin(Context::APPLY_PREPARE_BUILTIN_INDEX, CALL_FUNCTION); |
| } |
| |
| Generate_CheckStackOverflow(masm, r0, kArgcIsSmiTagged); |
| |
| // Push current limit and index. |
| const int kIndexOffset = kVectorOffset - (2 * kPointerSize); |
| const int kLimitOffset = kVectorOffset - (1 * kPointerSize); |
| __ mov(r1, Operand::Zero()); |
| __ ldr(r2, MemOperand(fp, kReceiverOffset)); |
| __ Push(r0, r1, r2); // limit, initial index and receiver. |
| |
| // Copy all arguments from the array to the stack. |
| Generate_PushAppliedArguments(masm, kVectorOffset, kArgumentsOffset, |
| kIndexOffset, kLimitOffset); |
| |
| // Call the callable. |
| // TODO(bmeurer): This should be a tail call according to ES6. |
| __ ldr(r1, MemOperand(fp, kFunctionOffset)); |
| __ Call(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET); |
| |
| // Tear down the internal frame and remove function, receiver and args. |
| } |
| __ add(sp, sp, Operand(kStackSize * kPointerSize)); |
| __ Jump(lr); |
| } |
| |
| |
| static void Generate_ConstructHelper(MacroAssembler* masm) { |
| const int kFormalParameters = 3; |
| const int kStackSize = kFormalParameters + 1; |
| |
| { |
| FrameAndConstantPoolScope frame_scope(masm, StackFrame::INTERNAL); |
| const int kNewTargetOffset = kFPOnStackSize + kPCOnStackSize; |
| const int kArgumentsOffset = kNewTargetOffset + kPointerSize; |
| const int kFunctionOffset = kArgumentsOffset + kPointerSize; |
| static const int kVectorOffset = |
| InternalFrameConstants::kCodeOffset - 1 * kPointerSize; |
| |
| // Push the vector. |
| __ ldr(r1, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(r1, FieldMemOperand(r1, SharedFunctionInfo::kFeedbackVectorOffset)); |
| __ Push(r1); |
| |
| // If newTarget is not supplied, set it to constructor |
| Label validate_arguments; |
| __ ldr(r0, MemOperand(fp, kNewTargetOffset)); |
| __ CompareRoot(r0, Heap::kUndefinedValueRootIndex); |
| __ b(ne, &validate_arguments); |
| __ ldr(r0, MemOperand(fp, kFunctionOffset)); |
| __ str(r0, MemOperand(fp, kNewTargetOffset)); |
| |
| // Validate arguments |
| __ bind(&validate_arguments); |
| __ ldr(r0, MemOperand(fp, kFunctionOffset)); // get the function |
| __ push(r0); |
| __ ldr(r0, MemOperand(fp, kArgumentsOffset)); // get the args array |
| __ push(r0); |
| __ ldr(r0, MemOperand(fp, kNewTargetOffset)); // get the new.target |
| __ push(r0); |
| __ InvokeBuiltin(Context::REFLECT_CONSTRUCT_PREPARE_BUILTIN_INDEX, |
| CALL_FUNCTION); |
| |
| Generate_CheckStackOverflow(masm, r0, kArgcIsSmiTagged); |
| |
| // Push current limit and index. |
| const int kIndexOffset = kVectorOffset - (2 * kPointerSize); |
| const int kLimitOffset = kVectorOffset - (1 * kPointerSize); |
| __ push(r0); // limit |
| __ mov(r1, Operand::Zero()); // initial index |
| __ push(r1); |
| // Push the constructor function as callee. |
| __ ldr(r0, MemOperand(fp, kFunctionOffset)); |
| __ push(r0); |
| |
| // Copy all arguments from the array to the stack. |
| Generate_PushAppliedArguments(masm, kVectorOffset, kArgumentsOffset, |
| kIndexOffset, kLimitOffset); |
| |
| // Use undefined feedback vector |
| __ LoadRoot(r2, Heap::kUndefinedValueRootIndex); |
| __ ldr(r1, MemOperand(fp, kFunctionOffset)); |
| __ ldr(r4, MemOperand(fp, kNewTargetOffset)); |
| |
| // Call the function. |
| CallConstructStub stub(masm->isolate(), SUPER_CONSTRUCTOR_CALL); |
| __ Call(stub.GetCode(), RelocInfo::CONSTRUCT_CALL); |
| |
| // Leave internal frame. |
| } |
| __ add(sp, sp, Operand(kStackSize * kPointerSize)); |
| __ Jump(lr); |
| } |
| |
| |
| void Builtins::Generate_FunctionApply(MacroAssembler* masm) { |
| Generate_ApplyHelper(masm, false); |
| } |
| |
| |
| void Builtins::Generate_ReflectApply(MacroAssembler* masm) { |
| Generate_ApplyHelper(masm, true); |
| } |
| |
| |
| void Builtins::Generate_ReflectConstruct(MacroAssembler* masm) { |
| Generate_ConstructHelper(masm); |
| } |
| |
| |
| static void ArgumentAdaptorStackCheck(MacroAssembler* masm, |
| Label* stack_overflow) { |
| // ----------- S t a t e ------------- |
| // -- r0 : actual number of arguments |
| // -- r1 : function (passed through to callee) |
| // -- r2 : expected number of arguments |
| // ----------------------------------- |
| // Check the stack for overflow. We are not trying to catch |
| // interruptions (e.g. debug break and preemption) here, so the "real stack |
| // limit" is checked. |
| __ LoadRoot(r5, Heap::kRealStackLimitRootIndex); |
| // Make r5 the space we have left. The stack might already be overflowed |
| // here which will cause r5 to become negative. |
| __ sub(r5, sp, r5); |
| // Check if the arguments will overflow the stack. |
| __ cmp(r5, Operand(r2, LSL, kPointerSizeLog2)); |
| __ b(le, stack_overflow); // Signed comparison. |
| } |
| |
| |
| static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) { |
| __ SmiTag(r0); |
| __ mov(r4, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| __ stm(db_w, sp, r0.bit() | r1.bit() | r4.bit() | |
| (FLAG_enable_embedded_constant_pool ? pp.bit() : 0) | |
| fp.bit() | lr.bit()); |
| __ add(fp, sp, |
| Operand(StandardFrameConstants::kFixedFrameSizeFromFp + kPointerSize)); |
| } |
| |
| |
| static void LeaveArgumentsAdaptorFrame(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : result being passed through |
| // ----------------------------------- |
| // Get the number of arguments passed (as a smi), tear down the frame and |
| // then tear down the parameters. |
| __ ldr(r1, MemOperand(fp, -(StandardFrameConstants::kFixedFrameSizeFromFp + |
| kPointerSize))); |
| |
| __ LeaveFrame(StackFrame::ARGUMENTS_ADAPTOR); |
| __ add(sp, sp, Operand::PointerOffsetFromSmiKey(r1)); |
| __ add(sp, sp, Operand(kPointerSize)); // adjust for receiver |
| } |
| |
| |
| // static |
| void Builtins::Generate_CallFunction(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r1 : the function to call (checked to be a JSFunction) |
| // ----------------------------------- |
| |
| Label convert, convert_global_proxy, convert_to_object, done_convert; |
| __ AssertFunction(r1); |
| // TODO(bmeurer): Throw a TypeError if function's [[FunctionKind]] internal |
| // slot is "classConstructor". |
| // Enter the context of the function; ToObject has to run in the function |
| // context, and we also need to take the global proxy from the function |
| // context in case of conversion. |
| // See ES6 section 9.2.1 [[Call]] ( thisArgument, argumentsList) |
| STATIC_ASSERT(SharedFunctionInfo::kNativeByteOffset == |
| SharedFunctionInfo::kStrictModeByteOffset); |
| __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| __ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| // We need to convert the receiver for non-native sloppy mode functions. |
| __ ldrb(r3, FieldMemOperand(r2, SharedFunctionInfo::kNativeByteOffset)); |
| __ tst(r3, Operand((1 << SharedFunctionInfo::kNativeBitWithinByte) | |
| (1 << SharedFunctionInfo::kStrictModeBitWithinByte))); |
| __ b(ne, &done_convert); |
| { |
| __ ldr(r3, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
| |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r1 : the function to call (checked to be a JSFunction) |
| // -- r2 : the shared function info. |
| // -- r3 : the receiver |
| // -- cp : the function context. |
| // ----------------------------------- |
| |
| Label convert_receiver; |
| __ JumpIfSmi(r3, &convert_to_object); |
| STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE); |
| __ CompareObjectType(r3, r4, r4, FIRST_JS_RECEIVER_TYPE); |
| __ b(hs, &done_convert); |
| __ JumpIfRoot(r3, Heap::kUndefinedValueRootIndex, &convert_global_proxy); |
| __ JumpIfNotRoot(r3, Heap::kNullValueRootIndex, &convert_to_object); |
| __ bind(&convert_global_proxy); |
| { |
| // Patch receiver to global proxy. |
| __ LoadGlobalProxy(r3); |
| } |
| __ b(&convert_receiver); |
| __ bind(&convert_to_object); |
| { |
| // Convert receiver using ToObject. |
| // TODO(bmeurer): Inline the allocation here to avoid building the frame |
| // in the fast case? (fall back to AllocateInNewSpace?) |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| __ SmiTag(r0); |
| __ Push(r0, r1); |
| __ mov(r0, r3); |
| ToObjectStub stub(masm->isolate()); |
| __ CallStub(&stub); |
| __ mov(r3, r0); |
| __ Pop(r0, r1); |
| __ SmiUntag(r0); |
| } |
| __ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| __ bind(&convert_receiver); |
| __ str(r3, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
| } |
| __ bind(&done_convert); |
| |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r1 : the function to call (checked to be a JSFunction) |
| // -- r2 : the shared function info. |
| // -- cp : the function context. |
| // ----------------------------------- |
| |
| __ ldr(r2, |
| FieldMemOperand(r2, SharedFunctionInfo::kFormalParameterCountOffset)); |
| __ SmiUntag(r2); |
| __ ldr(r3, FieldMemOperand(r1, JSFunction::kCodeEntryOffset)); |
| ParameterCount actual(r0); |
| ParameterCount expected(r2); |
| __ InvokeCode(r3, expected, actual, JUMP_FUNCTION, NullCallWrapper()); |
| } |
| |
| |
| // static |
| void Builtins::Generate_Call(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r1 : the target to call (can be any Object). |
| // ----------------------------------- |
| |
| Label non_callable, non_function, non_smi; |
| __ JumpIfSmi(r1, &non_callable); |
| __ bind(&non_smi); |
| __ CompareObjectType(r1, r4, r5, JS_FUNCTION_TYPE); |
| __ Jump(masm->isolate()->builtins()->CallFunction(), RelocInfo::CODE_TARGET, |
| eq); |
| __ cmp(r5, Operand(JS_FUNCTION_PROXY_TYPE)); |
| __ b(ne, &non_function); |
| |
| // 1. Call to function proxy. |
| // TODO(neis): This doesn't match the ES6 spec for [[Call]] on proxies. |
| __ ldr(r1, FieldMemOperand(r1, JSFunctionProxy::kCallTrapOffset)); |
| __ AssertNotSmi(r1); |
| __ b(&non_smi); |
| |
| // 2. Call to something else, which might have a [[Call]] internal method (if |
| // not we raise an exception). |
| __ bind(&non_function); |
| // Check if target has a [[Call]] internal method. |
| __ ldrb(r4, FieldMemOperand(r4, Map::kBitFieldOffset)); |
| __ tst(r4, Operand(1 << Map::kIsCallable)); |
| __ b(eq, &non_callable); |
| // Overwrite the original receiver the (original) target. |
| __ str(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
| // Let the "call_as_function_delegate" take care of the rest. |
| __ LoadGlobalFunction(Context::CALL_AS_FUNCTION_DELEGATE_INDEX, r1); |
| __ Jump(masm->isolate()->builtins()->CallFunction(), RelocInfo::CODE_TARGET); |
| |
| // 3. Call to something that is not callable. |
| __ bind(&non_callable); |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| __ Push(r1); |
| __ CallRuntime(Runtime::kThrowCalledNonCallable, 1); |
| } |
| } |
| |
| |
| // static |
| void Builtins::Generate_ConstructFunction(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r1 : the constructor to call (checked to be a JSFunction) |
| // -- r3 : the original constructor (checked to be a JSFunction) |
| // ----------------------------------- |
| __ AssertFunction(r1); |
| __ AssertFunction(r3); |
| |
| // Calling convention for function specific ConstructStubs require |
| // r2 to contain either an AllocationSite or undefined. |
| __ LoadRoot(r2, Heap::kUndefinedValueRootIndex); |
| |
| // Tail call to the function-specific construct stub (still in the caller |
| // context at this point). |
| __ ldr(r4, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(r4, FieldMemOperand(r4, SharedFunctionInfo::kConstructStubOffset)); |
| __ add(pc, r4, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| } |
| |
| |
| // static |
| void Builtins::Generate_ConstructProxy(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r1 : the constructor to call (checked to be a JSFunctionProxy) |
| // -- r3 : the original constructor (either the same as the constructor or |
| // the JSFunction on which new was invoked initially) |
| // ----------------------------------- |
| |
| // TODO(neis): This doesn't match the ES6 spec for [[Construct]] on proxies. |
| __ ldr(r1, FieldMemOperand(r1, JSFunctionProxy::kConstructTrapOffset)); |
| __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET); |
| } |
| |
| |
| // static |
| void Builtins::Generate_Construct(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r1 : the constructor to call (can be any Object) |
| // -- r3 : the original constructor (either the same as the constructor or |
| // the JSFunction on which new was invoked initially) |
| // ----------------------------------- |
| |
| // Check if target has a [[Construct]] internal method. |
| Label non_constructor; |
| __ JumpIfSmi(r1, &non_constructor); |
| __ ldr(r4, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| __ ldrb(r2, FieldMemOperand(r4, Map::kBitFieldOffset)); |
| __ tst(r2, Operand(1 << Map::kIsConstructor)); |
| __ b(eq, &non_constructor); |
| |
| // Dispatch based on instance type. |
| __ CompareInstanceType(r4, r5, JS_FUNCTION_TYPE); |
| __ Jump(masm->isolate()->builtins()->ConstructFunction(), |
| RelocInfo::CODE_TARGET, eq); |
| __ cmp(r5, Operand(JS_FUNCTION_PROXY_TYPE)); |
| __ Jump(masm->isolate()->builtins()->ConstructProxy(), RelocInfo::CODE_TARGET, |
| eq); |
| |
| // Called Construct on an exotic Object with a [[Construct]] internal method. |
| { |
| // Overwrite the original receiver with the (original) target. |
| __ str(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
| // Let the "call_as_constructor_delegate" take care of the rest. |
| __ LoadGlobalFunction(Context::CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, r1); |
| __ Jump(masm->isolate()->builtins()->CallFunction(), |
| RelocInfo::CODE_TARGET); |
| } |
| |
| // Called Construct on an Object that doesn't have a [[Construct]] internal |
| // method. |
| __ bind(&non_constructor); |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| __ Push(r1); |
| __ CallRuntime(Runtime::kThrowCalledNonCallable, 1); |
| } |
| } |
| |
| |
| void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : actual number of arguments |
| // -- r1 : function (passed through to callee) |
| // -- r2 : expected number of arguments |
| // ----------------------------------- |
| |
| Label stack_overflow; |
| ArgumentAdaptorStackCheck(masm, &stack_overflow); |
| Label invoke, dont_adapt_arguments; |
| |
| Label enough, too_few; |
| __ ldr(r3, FieldMemOperand(r1, JSFunction::kCodeEntryOffset)); |
| __ cmp(r0, r2); |
| __ b(lt, &too_few); |
| __ cmp(r2, Operand(SharedFunctionInfo::kDontAdaptArgumentsSentinel)); |
| __ b(eq, &dont_adapt_arguments); |
| |
| { // Enough parameters: actual >= expected |
| __ bind(&enough); |
| EnterArgumentsAdaptorFrame(masm); |
| |
| // Calculate copy start address into r0 and copy end address into r4. |
| // r0: actual number of arguments as a smi |
| // r1: function |
| // r2: expected number of arguments |
| // r3: code entry to call |
| __ add(r0, fp, Operand::PointerOffsetFromSmiKey(r0)); |
| // adjust for return address and receiver |
| __ add(r0, r0, Operand(2 * kPointerSize)); |
| __ sub(r4, r0, Operand(r2, LSL, kPointerSizeLog2)); |
| |
| // Copy the arguments (including the receiver) to the new stack frame. |
| // r0: copy start address |
| // r1: function |
| // r2: expected number of arguments |
| // r3: code entry to call |
| // r4: copy end address |
| |
| Label copy; |
| __ bind(©); |
| __ ldr(ip, MemOperand(r0, 0)); |
| __ push(ip); |
| __ cmp(r0, r4); // Compare before moving to next argument. |
| __ sub(r0, r0, Operand(kPointerSize)); |
| __ b(ne, ©); |
| |
| __ b(&invoke); |
| } |
| |
| { // Too few parameters: Actual < expected |
| __ bind(&too_few); |
| |
| // If the function is strong we need to throw an error. |
| Label no_strong_error; |
| __ ldr(r4, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(r5, FieldMemOperand(r4, SharedFunctionInfo::kCompilerHintsOffset)); |
| __ tst(r5, Operand(1 << (SharedFunctionInfo::kStrongModeFunction + |
| kSmiTagSize))); |
| __ b(eq, &no_strong_error); |
| |
| // What we really care about is the required number of arguments. |
| __ ldr(r4, FieldMemOperand(r4, SharedFunctionInfo::kLengthOffset)); |
| __ cmp(r0, Operand::SmiUntag(r4)); |
| __ b(ge, &no_strong_error); |
| |
| { |
| FrameScope frame(masm, StackFrame::MANUAL); |
| EnterArgumentsAdaptorFrame(masm); |
| __ CallRuntime(Runtime::kThrowStrongModeTooFewArguments, 0); |
| } |
| |
| __ bind(&no_strong_error); |
| EnterArgumentsAdaptorFrame(masm); |
| |
| // Calculate copy start address into r0 and copy end address is fp. |
| // r0: actual number of arguments as a smi |
| // r1: function |
| // r2: expected number of arguments |
| // r3: code entry to call |
| __ add(r0, fp, Operand::PointerOffsetFromSmiKey(r0)); |
| |
| // Copy the arguments (including the receiver) to the new stack frame. |
| // r0: copy start address |
| // r1: function |
| // r2: expected number of arguments |
| // r3: code entry to call |
| Label copy; |
| __ bind(©); |
| // Adjust load for return address and receiver. |
| __ ldr(ip, MemOperand(r0, 2 * kPointerSize)); |
| __ push(ip); |
| __ cmp(r0, fp); // Compare before moving to next argument. |
| __ sub(r0, r0, Operand(kPointerSize)); |
| __ b(ne, ©); |
| |
| // Fill the remaining expected arguments with undefined. |
| // r1: function |
| // r2: expected number of arguments |
| // r3: code entry to call |
| __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| __ sub(r4, fp, Operand(r2, LSL, kPointerSizeLog2)); |
| // Adjust for frame. |
| __ sub(r4, r4, Operand(StandardFrameConstants::kFixedFrameSizeFromFp + |
| 2 * kPointerSize)); |
| |
| Label fill; |
| __ bind(&fill); |
| __ push(ip); |
| __ cmp(sp, r4); |
| __ b(ne, &fill); |
| } |
| |
| // Call the entry point. |
| __ bind(&invoke); |
| __ mov(r0, r2); |
| // r0 : expected number of arguments |
| // r1 : function (passed through to callee) |
| __ Call(r3); |
| |
| // Store offset of return address for deoptimizer. |
| masm->isolate()->heap()->SetArgumentsAdaptorDeoptPCOffset(masm->pc_offset()); |
| |
| // Exit frame and return. |
| LeaveArgumentsAdaptorFrame(masm); |
| __ Jump(lr); |
| |
| |
| // ------------------------------------------- |
| // Dont adapt arguments. |
| // ------------------------------------------- |
| __ bind(&dont_adapt_arguments); |
| __ Jump(r3); |
| |
| __ bind(&stack_overflow); |
| { |
| FrameScope frame(masm, StackFrame::MANUAL); |
| EnterArgumentsAdaptorFrame(masm); |
| __ CallRuntime(Runtime::kThrowStackOverflow, 0); |
| __ bkpt(0); |
| } |
| } |
| |
| |
| #undef __ |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_TARGET_ARCH_ARM |