Upgrade to 3.29
Update V8 to 3.29.88.17 and update makefiles to support building on
all the relevant platforms.
Bug: 17370214
Change-Id: Ia3407c157fd8d72a93e23d8318ccaf6ecf77fa4e
diff --git a/src/x87/builtins-x87.cc b/src/x87/builtins-x87.cc
new file mode 100644
index 0000000..d631175
--- /dev/null
+++ b/src/x87/builtins-x87.cc
@@ -0,0 +1,1458 @@
+// 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.
+
+#include "src/v8.h"
+
+#if V8_TARGET_ARCH_X87
+
+#include "src/code-factory.h"
+#include "src/codegen.h"
+#include "src/deoptimizer.h"
+#include "src/full-codegen.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 -------------
+ // -- eax : number of arguments excluding receiver
+ // -- edi : called function (only guaranteed when
+ // extra_args requires it)
+ // -- esi : context
+ // -- esp[0] : return address
+ // -- esp[4] : last argument
+ // -- ...
+ // -- esp[4 * argc] : first argument (argc == eax)
+ // -- esp[4 * (argc +1)] : receiver
+ // -----------------------------------
+
+ // Insert extra arguments.
+ int num_extra_args = 0;
+ if (extra_args == NEEDS_CALLED_FUNCTION) {
+ num_extra_args = 1;
+ Register scratch = ebx;
+ __ pop(scratch); // Save return address.
+ __ push(edi);
+ __ push(scratch); // Restore return address.
+ } else {
+ DCHECK(extra_args == NO_EXTRA_ARGUMENTS);
+ }
+
+ // JumpToExternalReference expects eax to contain the number of arguments
+ // including the receiver and the extra arguments.
+ __ add(eax, Immediate(num_extra_args + 1));
+ __ JumpToExternalReference(ExternalReference(id, masm->isolate()));
+}
+
+
+static void CallRuntimePassFunction(
+ MacroAssembler* masm, Runtime::FunctionId function_id) {
+ FrameScope scope(masm, StackFrame::INTERNAL);
+ // Push a copy of the function.
+ __ push(edi);
+ // Function is also the parameter to the runtime call.
+ __ push(edi);
+
+ __ CallRuntime(function_id, 1);
+ // Restore receiver.
+ __ pop(edi);
+}
+
+
+static void GenerateTailCallToSharedCode(MacroAssembler* masm) {
+ __ mov(eax, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
+ __ mov(eax, FieldOperand(eax, SharedFunctionInfo::kCodeOffset));
+ __ lea(eax, FieldOperand(eax, Code::kHeaderSize));
+ __ jmp(eax);
+}
+
+
+static void GenerateTailCallToReturnedCode(MacroAssembler* masm) {
+ __ lea(eax, FieldOperand(eax, Code::kHeaderSize));
+ __ jmp(eax);
+}
+
+
+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;
+ ExternalReference stack_limit =
+ ExternalReference::address_of_stack_limit(masm->isolate());
+ __ cmp(esp, Operand::StaticVariable(stack_limit));
+ __ j(above_equal, &ok, Label::kNear);
+
+ CallRuntimePassFunction(masm, Runtime::kTryInstallOptimizedCode);
+ GenerateTailCallToReturnedCode(masm);
+
+ __ bind(&ok);
+ GenerateTailCallToSharedCode(masm);
+}
+
+
+static void Generate_JSConstructStubHelper(MacroAssembler* masm,
+ bool is_api_function,
+ bool create_memento) {
+ // ----------- S t a t e -------------
+ // -- eax: number of arguments
+ // -- edi: constructor function
+ // -- ebx: allocation site or undefined
+ // -----------------------------------
+
+ // Should never create mementos for api functions.
+ DCHECK(!is_api_function || !create_memento);
+
+ // Enter a construct frame.
+ {
+ FrameScope scope(masm, StackFrame::CONSTRUCT);
+
+ if (create_memento) {
+ __ AssertUndefinedOrAllocationSite(ebx);
+ __ push(ebx);
+ }
+
+ // Store a smi-tagged arguments count on the stack.
+ __ SmiTag(eax);
+ __ push(eax);
+
+ // Push the function to invoke on the stack.
+ __ push(edi);
+
+ // 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) {
+ Label undo_allocation;
+ ExternalReference debug_step_in_fp =
+ ExternalReference::debug_step_in_fp_address(masm->isolate());
+ __ cmp(Operand::StaticVariable(debug_step_in_fp), Immediate(0));
+ __ j(not_equal, &rt_call);
+
+ // Verified that the constructor is a JSFunction.
+ // Load the initial map and verify that it is in fact a map.
+ // edi: constructor
+ __ mov(eax, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset));
+ // Will both indicate a NULL and a Smi
+ __ JumpIfSmi(eax, &rt_call);
+ // edi: constructor
+ // eax: initial map (if proven valid below)
+ __ CmpObjectType(eax, MAP_TYPE, ebx);
+ __ j(not_equal, &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.
+ // edi: constructor
+ // eax: initial map
+ __ CmpInstanceType(eax, JS_FUNCTION_TYPE);
+ __ j(equal, &rt_call);
+
+ if (!is_api_function) {
+ Label allocate;
+ // The code below relies on these assumptions.
+ STATIC_ASSERT(JSFunction::kNoSlackTracking == 0);
+ STATIC_ASSERT(Map::ConstructionCount::kShift +
+ Map::ConstructionCount::kSize == 32);
+ // Check if slack tracking is enabled.
+ __ mov(esi, FieldOperand(eax, Map::kBitField3Offset));
+ __ shr(esi, Map::ConstructionCount::kShift);
+ __ j(zero, &allocate); // JSFunction::kNoSlackTracking
+ // Decrease generous allocation count.
+ __ sub(FieldOperand(eax, Map::kBitField3Offset),
+ Immediate(1 << Map::ConstructionCount::kShift));
+
+ __ cmp(esi, JSFunction::kFinishSlackTracking);
+ __ j(not_equal, &allocate);
+
+ __ push(eax);
+ __ push(edi);
+
+ __ push(edi); // constructor
+ __ CallRuntime(Runtime::kFinalizeInstanceSize, 1);
+
+ __ pop(edi);
+ __ pop(eax);
+ __ xor_(esi, esi); // JSFunction::kNoSlackTracking
+
+ __ bind(&allocate);
+ }
+
+ // Now allocate the JSObject on the heap.
+ // edi: constructor
+ // eax: initial map
+ __ movzx_b(edi, FieldOperand(eax, Map::kInstanceSizeOffset));
+ __ shl(edi, kPointerSizeLog2);
+ if (create_memento) {
+ __ add(edi, Immediate(AllocationMemento::kSize));
+ }
+
+ __ Allocate(edi, ebx, edi, no_reg, &rt_call, NO_ALLOCATION_FLAGS);
+
+ Factory* factory = masm->isolate()->factory();
+
+ // Allocated the JSObject, now initialize the fields.
+ // eax: initial map
+ // ebx: JSObject
+ // edi: start of next object (including memento if create_memento)
+ __ mov(Operand(ebx, JSObject::kMapOffset), eax);
+ __ mov(ecx, factory->empty_fixed_array());
+ __ mov(Operand(ebx, JSObject::kPropertiesOffset), ecx);
+ __ mov(Operand(ebx, JSObject::kElementsOffset), ecx);
+ // Set extra fields in the newly allocated object.
+ // eax: initial map
+ // ebx: JSObject
+ // edi: start of next object (including memento if create_memento)
+ // esi: slack tracking counter (non-API function case)
+ __ mov(edx, factory->undefined_value());
+ __ lea(ecx, Operand(ebx, JSObject::kHeaderSize));
+ if (!is_api_function) {
+ Label no_inobject_slack_tracking;
+
+ // Check if slack tracking is enabled.
+ __ cmp(esi, JSFunction::kNoSlackTracking);
+ __ j(equal, &no_inobject_slack_tracking);
+
+ // Allocate object with a slack.
+ __ movzx_b(esi,
+ FieldOperand(eax, Map::kPreAllocatedPropertyFieldsOffset));
+ __ lea(esi,
+ Operand(ebx, esi, times_pointer_size, JSObject::kHeaderSize));
+ // esi: offset of first field after pre-allocated fields
+ if (FLAG_debug_code) {
+ __ cmp(esi, edi);
+ __ Assert(less_equal,
+ kUnexpectedNumberOfPreAllocatedPropertyFields);
+ }
+ __ InitializeFieldsWithFiller(ecx, esi, edx);
+ __ mov(edx, factory->one_pointer_filler_map());
+ // Fill the remaining fields with one pointer filler map.
+
+ __ bind(&no_inobject_slack_tracking);
+ }
+
+ if (create_memento) {
+ __ lea(esi, Operand(edi, -AllocationMemento::kSize));
+ __ InitializeFieldsWithFiller(ecx, esi, edx);
+
+ // Fill in memento fields if necessary.
+ // esi: points to the allocated but uninitialized memento.
+ __ mov(Operand(esi, AllocationMemento::kMapOffset),
+ factory->allocation_memento_map());
+ // Get the cell or undefined.
+ __ mov(edx, Operand(esp, kPointerSize*2));
+ __ mov(Operand(esi, AllocationMemento::kAllocationSiteOffset),
+ edx);
+ } else {
+ __ InitializeFieldsWithFiller(ecx, edi, edx);
+ }
+
+ // 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. Any
+ // failures need to undo the allocation, so that the heap is in a
+ // consistent state and verifiable.
+ // eax: initial map
+ // ebx: JSObject
+ // edi: start of next object
+ __ or_(ebx, Immediate(kHeapObjectTag));
+
+ // Check if a non-empty properties array is needed.
+ // Allocate and initialize a FixedArray if it is.
+ // eax: initial map
+ // ebx: JSObject
+ // edi: start of next object
+ // Calculate the total number of properties described by the map.
+ __ movzx_b(edx, FieldOperand(eax, Map::kUnusedPropertyFieldsOffset));
+ __ movzx_b(ecx,
+ FieldOperand(eax, Map::kPreAllocatedPropertyFieldsOffset));
+ __ add(edx, ecx);
+ // Calculate unused properties past the end of the in-object properties.
+ __ movzx_b(ecx, FieldOperand(eax, Map::kInObjectPropertiesOffset));
+ __ sub(edx, ecx);
+ // Done if no extra properties are to be allocated.
+ __ j(zero, &allocated);
+ __ Assert(positive, kPropertyAllocationCountFailed);
+
+ // Scale the number of elements by pointer size and add the header for
+ // FixedArrays to the start of the next object calculation from above.
+ // ebx: JSObject
+ // edi: start of next object (will be start of FixedArray)
+ // edx: number of elements in properties array
+ __ Allocate(FixedArray::kHeaderSize,
+ times_pointer_size,
+ edx,
+ REGISTER_VALUE_IS_INT32,
+ edi,
+ ecx,
+ no_reg,
+ &undo_allocation,
+ RESULT_CONTAINS_TOP);
+
+ // Initialize the FixedArray.
+ // ebx: JSObject
+ // edi: FixedArray
+ // edx: number of elements
+ // ecx: start of next object
+ __ mov(eax, factory->fixed_array_map());
+ __ mov(Operand(edi, FixedArray::kMapOffset), eax); // setup the map
+ __ SmiTag(edx);
+ __ mov(Operand(edi, FixedArray::kLengthOffset), edx); // and length
+
+ // Initialize the fields to undefined.
+ // ebx: JSObject
+ // edi: FixedArray
+ // ecx: start of next object
+ { Label loop, entry;
+ __ mov(edx, factory->undefined_value());
+ __ lea(eax, Operand(edi, FixedArray::kHeaderSize));
+ __ jmp(&entry);
+ __ bind(&loop);
+ __ mov(Operand(eax, 0), edx);
+ __ add(eax, Immediate(kPointerSize));
+ __ bind(&entry);
+ __ cmp(eax, ecx);
+ __ j(below, &loop);
+ }
+
+ // Store the initialized FixedArray into the properties field of
+ // the JSObject
+ // ebx: JSObject
+ // edi: FixedArray
+ __ or_(edi, Immediate(kHeapObjectTag)); // add the heap tag
+ __ mov(FieldOperand(ebx, JSObject::kPropertiesOffset), edi);
+
+
+ // Continue with JSObject being successfully allocated
+ // ebx: JSObject
+ __ jmp(&allocated);
+
+ // Undo the setting of the new top so that the heap is verifiable. For
+ // example, the map's unused properties potentially do not match the
+ // allocated objects unused properties.
+ // ebx: JSObject (previous new top)
+ __ bind(&undo_allocation);
+ __ UndoAllocationInNewSpace(ebx);
+ }
+
+ // Allocate the new receiver object using the runtime call.
+ __ bind(&rt_call);
+ int offset = 0;
+ if (create_memento) {
+ // Get the cell or allocation site.
+ __ mov(edi, Operand(esp, kPointerSize * 2));
+ __ push(edi);
+ offset = kPointerSize;
+ }
+
+ // Must restore esi (context) and edi (constructor) before calling runtime.
+ __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
+ __ mov(edi, Operand(esp, offset));
+ // edi: function (constructor)
+ __ push(edi);
+ if (create_memento) {
+ __ CallRuntime(Runtime::kNewObjectWithAllocationSite, 2);
+ } else {
+ __ CallRuntime(Runtime::kNewObject, 1);
+ }
+ __ mov(ebx, eax); // store result in ebx
+
+ // If we ended up using the runtime, and we want a memento, then the
+ // runtime call made it for us, and we shouldn't do create count
+ // increment.
+ Label count_incremented;
+ if (create_memento) {
+ __ jmp(&count_incremented);
+ }
+
+ // New object allocated.
+ // ebx: newly allocated object
+ __ bind(&allocated);
+
+ if (create_memento) {
+ __ mov(ecx, Operand(esp, kPointerSize * 2));
+ __ cmp(ecx, masm->isolate()->factory()->undefined_value());
+ __ j(equal, &count_incremented);
+ // ecx is an AllocationSite. We are creating a memento from it, so we
+ // need to increment the memento create count.
+ __ add(FieldOperand(ecx, AllocationSite::kPretenureCreateCountOffset),
+ Immediate(Smi::FromInt(1)));
+ __ bind(&count_incremented);
+ }
+
+ // Retrieve the function from the stack.
+ __ pop(edi);
+
+ // Retrieve smi-tagged arguments count from the stack.
+ __ mov(eax, Operand(esp, 0));
+ __ SmiUntag(eax);
+
+ // Push the allocated receiver to the stack. We need two copies
+ // because we may have to return the original one and the calling
+ // conventions dictate that the called function pops the receiver.
+ __ push(ebx);
+ __ push(ebx);
+
+ // Set up pointer to last argument.
+ __ lea(ebx, Operand(ebp, StandardFrameConstants::kCallerSPOffset));
+
+ // Copy arguments and receiver to the expression stack.
+ Label loop, entry;
+ __ mov(ecx, eax);
+ __ jmp(&entry);
+ __ bind(&loop);
+ __ push(Operand(ebx, ecx, times_4, 0));
+ __ bind(&entry);
+ __ dec(ecx);
+ __ j(greater_equal, &loop);
+
+ // Call the function.
+ if (is_api_function) {
+ __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
+ Handle<Code> code =
+ masm->isolate()->builtins()->HandleApiCallConstruct();
+ __ call(code, RelocInfo::CODE_TARGET);
+ } else {
+ ParameterCount actual(eax);
+ __ InvokeFunction(edi, 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.
+ __ mov(esi, Operand(ebp, 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.
+ __ JumpIfSmi(eax, &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.
+ __ CmpObjectType(eax, FIRST_SPEC_OBJECT_TYPE, ecx);
+ __ j(above_equal, &exit);
+
+ // Throw away the result of the constructor invocation and use the
+ // on-stack receiver as the result.
+ __ bind(&use_receiver);
+ __ mov(eax, Operand(esp, 0));
+
+ // Restore the arguments count and leave the construct frame.
+ __ bind(&exit);
+ __ mov(ebx, Operand(esp, kPointerSize)); // Get arguments count.
+
+ // Leave construct frame.
+ }
+
+ // Remove caller arguments from the stack and return.
+ STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0);
+ __ pop(ecx);
+ __ lea(esp, Operand(esp, ebx, times_2, 1 * kPointerSize)); // 1 ~ receiver
+ __ push(ecx);
+ __ IncrementCounter(masm->isolate()->counters()->constructed_objects(), 1);
+ __ ret(0);
+}
+
+
+void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
+ Generate_JSConstructStubHelper(masm, false, FLAG_pretenuring_call_new);
+}
+
+
+void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) {
+ Generate_JSConstructStubHelper(masm, true, false);
+}
+
+
+static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
+ bool is_construct) {
+ ProfileEntryHookStub::MaybeCallEntryHook(masm);
+
+ // Clear the context before we push it when entering the internal frame.
+ __ Move(esi, Immediate(0));
+
+ {
+ FrameScope scope(masm, StackFrame::INTERNAL);
+
+ // Load the previous frame pointer (ebx) to access C arguments
+ __ mov(ebx, Operand(ebp, 0));
+
+ // Get the function from the frame and setup the context.
+ __ mov(ecx, Operand(ebx, EntryFrameConstants::kFunctionArgOffset));
+ __ mov(esi, FieldOperand(ecx, JSFunction::kContextOffset));
+
+ // Push the function and the receiver onto the stack.
+ __ push(ecx);
+ __ push(Operand(ebx, EntryFrameConstants::kReceiverArgOffset));
+
+ // Load the number of arguments and setup pointer to the arguments.
+ __ mov(eax, Operand(ebx, EntryFrameConstants::kArgcOffset));
+ __ mov(ebx, Operand(ebx, EntryFrameConstants::kArgvOffset));
+
+ // Copy arguments to the stack in a loop.
+ Label loop, entry;
+ __ Move(ecx, Immediate(0));
+ __ jmp(&entry);
+ __ bind(&loop);
+ __ mov(edx, Operand(ebx, ecx, times_4, 0)); // push parameter from argv
+ __ push(Operand(edx, 0)); // dereference handle
+ __ inc(ecx);
+ __ bind(&entry);
+ __ cmp(ecx, eax);
+ __ j(not_equal, &loop);
+
+ // Get the function from the stack and call it.
+ // kPointerSize for the receiver.
+ __ mov(edi, Operand(esp, eax, times_4, kPointerSize));
+
+ // Invoke the code.
+ if (is_construct) {
+ // No type feedback cell is available
+ __ mov(ebx, masm->isolate()->factory()->undefined_value());
+ CallConstructStub stub(masm->isolate(), NO_CALL_CONSTRUCTOR_FLAGS);
+ __ CallStub(&stub);
+ } else {
+ ParameterCount actual(eax);
+ __ InvokeFunction(edi, actual, CALL_FUNCTION,
+ NullCallWrapper());
+ }
+
+ // Exit the internal frame. Notice that this also removes the empty.
+ // context and the function left on the stack by the code
+ // invocation.
+ }
+ __ ret(kPointerSize); // Remove receiver.
+}
+
+
+void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) {
+ Generate_JSEntryTrampolineHelper(masm, false);
+}
+
+
+void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) {
+ Generate_JSEntryTrampolineHelper(masm, true);
+}
+
+
+void Builtins::Generate_CompileLazy(MacroAssembler* masm) {
+ CallRuntimePassFunction(masm, Runtime::kCompileLazy);
+ GenerateTailCallToReturnedCode(masm);
+}
+
+
+
+static void CallCompileOptimized(MacroAssembler* masm, bool concurrent) {
+ FrameScope scope(masm, StackFrame::INTERNAL);
+ // Push a copy of the function.
+ __ push(edi);
+ // Function is also the parameter to the runtime call.
+ __ push(edi);
+ // Whether to compile in a background thread.
+ __ Push(masm->isolate()->factory()->ToBoolean(concurrent));
+
+ __ CallRuntime(Runtime::kCompileOptimized, 2);
+ // Restore receiver.
+ __ pop(edi);
+}
+
+
+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.
+
+ // Re-execute the code that was patched back to the young age when
+ // the stub returns.
+ __ sub(Operand(esp, 0), Immediate(5));
+ __ pushad();
+ __ mov(eax, Operand(esp, 8 * kPointerSize));
+ {
+ FrameScope scope(masm, StackFrame::MANUAL);
+ __ PrepareCallCFunction(2, ebx);
+ __ mov(Operand(esp, 1 * kPointerSize),
+ Immediate(ExternalReference::isolate_address(masm->isolate())));
+ __ mov(Operand(esp, 0), eax);
+ __ CallCFunction(
+ ExternalReference::get_make_code_young_function(masm->isolate()), 2);
+ }
+ __ popad();
+ __ ret(0);
+}
+
+#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.
+ __ pushad();
+ __ mov(eax, Operand(esp, 8 * kPointerSize));
+ __ sub(eax, Immediate(Assembler::kCallInstructionLength));
+ { // NOLINT
+ FrameScope scope(masm, StackFrame::MANUAL);
+ __ PrepareCallCFunction(2, ebx);
+ __ mov(Operand(esp, 1 * kPointerSize),
+ Immediate(ExternalReference::isolate_address(masm->isolate())));
+ __ mov(Operand(esp, 0), eax);
+ __ CallCFunction(
+ ExternalReference::get_mark_code_as_executed_function(masm->isolate()),
+ 2);
+ }
+ __ popad();
+
+ // Perform prologue operations usually performed by the young code stub.
+ __ pop(eax); // Pop return address into scratch register.
+ __ push(ebp); // Caller's frame pointer.
+ __ mov(ebp, esp);
+ __ push(esi); // Callee's context.
+ __ push(edi); // Callee's JS Function.
+ __ push(eax); // Push return address after frame prologue.
+
+ // Jump to point after the code-age stub.
+ __ ret(0);
+}
+
+
+void Builtins::Generate_MarkCodeAsExecutedTwice(MacroAssembler* masm) {
+ GenerateMakeCodeYoungAgainCommon(masm);
+}
+
+
+static void Generate_NotifyStubFailureHelper(MacroAssembler* masm,
+ SaveFPRegsMode save_doubles) {
+ // Enter an internal frame.
+ {
+ FrameScope 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.
+ __ pushad();
+ __ CallRuntime(Runtime::kNotifyStubFailure, 0, save_doubles);
+ __ popad();
+ // Tear down internal frame.
+ }
+
+ __ pop(MemOperand(esp, 0)); // Ignore state offset
+ __ ret(0); // Return to IC Miss stub, continuation still on stack.
+}
+
+
+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) {
+ {
+ FrameScope scope(masm, StackFrame::INTERNAL);
+
+ // Pass deoptimization type to the runtime system.
+ __ push(Immediate(Smi::FromInt(static_cast<int>(type))));
+ __ CallRuntime(Runtime::kNotifyDeoptimized, 1);
+
+ // Tear down internal frame.
+ }
+
+ // Get the full codegen state from the stack and untag it.
+ __ mov(ecx, Operand(esp, 1 * kPointerSize));
+ __ SmiUntag(ecx);
+
+ // Switch on the state.
+ Label not_no_registers, not_tos_eax;
+ __ cmp(ecx, FullCodeGenerator::NO_REGISTERS);
+ __ j(not_equal, ¬_no_registers, Label::kNear);
+ __ ret(1 * kPointerSize); // Remove state.
+
+ __ bind(¬_no_registers);
+ __ mov(eax, Operand(esp, 2 * kPointerSize));
+ __ cmp(ecx, FullCodeGenerator::TOS_REG);
+ __ j(not_equal, ¬_tos_eax, Label::kNear);
+ __ ret(2 * kPointerSize); // Remove state, eax.
+
+ __ bind(¬_tos_eax);
+ __ Abort(kNoCasesLeft);
+}
+
+
+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_FunctionCall(MacroAssembler* masm) {
+ Factory* factory = masm->isolate()->factory();
+
+ // 1. Make sure we have at least one argument.
+ { Label done;
+ __ test(eax, eax);
+ __ j(not_zero, &done);
+ __ pop(ebx);
+ __ push(Immediate(factory->undefined_value()));
+ __ push(ebx);
+ __ inc(eax);
+ __ bind(&done);
+ }
+
+ // 2. Get the function to call (passed as receiver) from the stack, check
+ // if it is a function.
+ Label slow, non_function;
+ // 1 ~ return address.
+ __ mov(edi, Operand(esp, eax, times_4, 1 * kPointerSize));
+ __ JumpIfSmi(edi, &non_function);
+ __ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx);
+ __ j(not_equal, &slow);
+
+
+ // 3a. Patch the first argument if necessary when calling a function.
+ Label shift_arguments;
+ __ Move(edx, Immediate(0)); // indicate regular JS_FUNCTION
+ { Label convert_to_object, use_global_proxy, patch_receiver;
+ // Change context eagerly in case we need the global receiver.
+ __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
+
+ // Do not transform the receiver for strict mode functions.
+ __ mov(ebx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
+ __ test_b(FieldOperand(ebx, SharedFunctionInfo::kStrictModeByteOffset),
+ 1 << SharedFunctionInfo::kStrictModeBitWithinByte);
+ __ j(not_equal, &shift_arguments);
+
+ // Do not transform the receiver for natives (shared already in ebx).
+ __ test_b(FieldOperand(ebx, SharedFunctionInfo::kNativeByteOffset),
+ 1 << SharedFunctionInfo::kNativeBitWithinByte);
+ __ j(not_equal, &shift_arguments);
+
+ // Compute the receiver in sloppy mode.
+ __ mov(ebx, Operand(esp, eax, times_4, 0)); // First argument.
+
+ // Call ToObject on the receiver if it is not an object, or use the
+ // global object if it is null or undefined.
+ __ JumpIfSmi(ebx, &convert_to_object);
+ __ cmp(ebx, factory->null_value());
+ __ j(equal, &use_global_proxy);
+ __ cmp(ebx, factory->undefined_value());
+ __ j(equal, &use_global_proxy);
+ STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE);
+ __ CmpObjectType(ebx, FIRST_SPEC_OBJECT_TYPE, ecx);
+ __ j(above_equal, &shift_arguments);
+
+ __ bind(&convert_to_object);
+
+ { // In order to preserve argument count.
+ FrameScope scope(masm, StackFrame::INTERNAL);
+ __ SmiTag(eax);
+ __ push(eax);
+
+ __ push(ebx);
+ __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
+ __ mov(ebx, eax);
+ __ Move(edx, Immediate(0)); // restore
+
+ __ pop(eax);
+ __ SmiUntag(eax);
+ }
+
+ // Restore the function to edi.
+ __ mov(edi, Operand(esp, eax, times_4, 1 * kPointerSize));
+ __ jmp(&patch_receiver);
+
+ __ bind(&use_global_proxy);
+ __ mov(ebx,
+ Operand(esi, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX)));
+ __ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalProxyOffset));
+
+ __ bind(&patch_receiver);
+ __ mov(Operand(esp, eax, times_4, 0), ebx);
+
+ __ jmp(&shift_arguments);
+ }
+
+ // 3b. Check for function proxy.
+ __ bind(&slow);
+ __ Move(edx, Immediate(1)); // indicate function proxy
+ __ CmpInstanceType(ecx, JS_FUNCTION_PROXY_TYPE);
+ __ j(equal, &shift_arguments);
+ __ bind(&non_function);
+ __ Move(edx, Immediate(2)); // indicate non-function
+
+ // 3c. Patch the first argument when calling a non-function. The
+ // CALL_NON_FUNCTION builtin expects the non-function callee as
+ // receiver, so overwrite the first argument which will ultimately
+ // become the receiver.
+ __ mov(Operand(esp, eax, times_4, 0), edi);
+
+ // 4. 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.
+ __ bind(&shift_arguments);
+ { Label loop;
+ __ mov(ecx, eax);
+ __ bind(&loop);
+ __ mov(ebx, Operand(esp, ecx, times_4, 0));
+ __ mov(Operand(esp, ecx, times_4, kPointerSize), ebx);
+ __ dec(ecx);
+ __ j(not_sign, &loop); // While non-negative (to copy return address).
+ __ pop(ebx); // Discard copy of return address.
+ __ dec(eax); // One fewer argument (first argument is new receiver).
+ }
+
+ // 5a. Call non-function via tail call to CALL_NON_FUNCTION builtin,
+ // or a function proxy via CALL_FUNCTION_PROXY.
+ { Label function, non_proxy;
+ __ test(edx, edx);
+ __ j(zero, &function);
+ __ Move(ebx, Immediate(0));
+ __ cmp(edx, Immediate(1));
+ __ j(not_equal, &non_proxy);
+
+ __ pop(edx); // return address
+ __ push(edi); // re-add proxy object as additional argument
+ __ push(edx);
+ __ inc(eax);
+ __ GetBuiltinEntry(edx, Builtins::CALL_FUNCTION_PROXY);
+ __ jmp(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(),
+ RelocInfo::CODE_TARGET);
+
+ __ bind(&non_proxy);
+ __ GetBuiltinEntry(edx, Builtins::CALL_NON_FUNCTION);
+ __ jmp(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(),
+ RelocInfo::CODE_TARGET);
+ __ bind(&function);
+ }
+
+ // 5b. Get the code to call from the function and check that the number of
+ // expected arguments matches what we're providing. If so, jump
+ // (tail-call) to the code in register edx without checking arguments.
+ __ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
+ __ mov(ebx,
+ FieldOperand(edx, SharedFunctionInfo::kFormalParameterCountOffset));
+ __ mov(edx, FieldOperand(edi, JSFunction::kCodeEntryOffset));
+ __ SmiUntag(ebx);
+ __ cmp(eax, ebx);
+ __ j(not_equal,
+ masm->isolate()->builtins()->ArgumentsAdaptorTrampoline());
+
+ ParameterCount expected(0);
+ __ InvokeCode(edx, expected, expected, JUMP_FUNCTION, NullCallWrapper());
+}
+
+
+void Builtins::Generate_FunctionApply(MacroAssembler* masm) {
+ static const int kArgumentsOffset = 2 * kPointerSize;
+ static const int kReceiverOffset = 3 * kPointerSize;
+ static const int kFunctionOffset = 4 * kPointerSize;
+ {
+ FrameScope frame_scope(masm, StackFrame::INTERNAL);
+
+ __ push(Operand(ebp, kFunctionOffset)); // push this
+ __ push(Operand(ebp, kArgumentsOffset)); // push arguments
+ __ InvokeBuiltin(Builtins::APPLY_PREPARE, CALL_FUNCTION);
+
+ // 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;
+ ExternalReference real_stack_limit =
+ ExternalReference::address_of_real_stack_limit(masm->isolate());
+ __ mov(edi, Operand::StaticVariable(real_stack_limit));
+ // Make ecx the space we have left. The stack might already be overflowed
+ // here which will cause ecx to become negative.
+ __ mov(ecx, esp);
+ __ sub(ecx, edi);
+ // Make edx the space we need for the array when it is unrolled onto the
+ // stack.
+ __ mov(edx, eax);
+ __ shl(edx, kPointerSizeLog2 - kSmiTagSize);
+ // Check if the arguments will overflow the stack.
+ __ cmp(ecx, edx);
+ __ j(greater, &okay); // Signed comparison.
+
+ // Out of stack space.
+ __ push(Operand(ebp, 4 * kPointerSize)); // push this
+ __ push(eax);
+ __ InvokeBuiltin(Builtins::STACK_OVERFLOW, CALL_FUNCTION);
+ __ bind(&okay);
+ // End of stack check.
+
+ // Push current index and limit.
+ const int kLimitOffset =
+ StandardFrameConstants::kExpressionsOffset - 1 * kPointerSize;
+ const int kIndexOffset = kLimitOffset - 1 * kPointerSize;
+ __ push(eax); // limit
+ __ push(Immediate(0)); // index
+
+ // Get the receiver.
+ __ mov(ebx, Operand(ebp, kReceiverOffset));
+
+ // Check that the function is a JS function (otherwise it must be a proxy).
+ Label push_receiver, use_global_proxy;
+ __ mov(edi, Operand(ebp, kFunctionOffset));
+ __ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx);
+ __ j(not_equal, &push_receiver);
+
+ // Change context eagerly to get the right global object if necessary.
+ __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
+
+ // Compute the receiver.
+ // Do not transform the receiver for strict mode functions.
+ Label call_to_object;
+ __ mov(ecx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
+ __ test_b(FieldOperand(ecx, SharedFunctionInfo::kStrictModeByteOffset),
+ 1 << SharedFunctionInfo::kStrictModeBitWithinByte);
+ __ j(not_equal, &push_receiver);
+
+ Factory* factory = masm->isolate()->factory();
+
+ // Do not transform the receiver for natives (shared already in ecx).
+ __ test_b(FieldOperand(ecx, SharedFunctionInfo::kNativeByteOffset),
+ 1 << SharedFunctionInfo::kNativeBitWithinByte);
+ __ j(not_equal, &push_receiver);
+
+ // Compute the receiver in sloppy mode.
+ // Call ToObject on the receiver if it is not an object, or use the
+ // global object if it is null or undefined.
+ __ JumpIfSmi(ebx, &call_to_object);
+ __ cmp(ebx, factory->null_value());
+ __ j(equal, &use_global_proxy);
+ __ cmp(ebx, factory->undefined_value());
+ __ j(equal, &use_global_proxy);
+ STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE);
+ __ CmpObjectType(ebx, FIRST_SPEC_OBJECT_TYPE, ecx);
+ __ j(above_equal, &push_receiver);
+
+ __ bind(&call_to_object);
+ __ push(ebx);
+ __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
+ __ mov(ebx, eax);
+ __ jmp(&push_receiver);
+
+ __ bind(&use_global_proxy);
+ __ mov(ebx,
+ Operand(esi, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX)));
+ __ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalProxyOffset));
+
+ // Push the receiver.
+ __ bind(&push_receiver);
+ __ push(ebx);
+
+ // Copy all arguments from the array to the stack.
+ Label entry, loop;
+ Register receiver = LoadDescriptor::ReceiverRegister();
+ Register key = LoadDescriptor::NameRegister();
+ __ mov(key, Operand(ebp, kIndexOffset));
+ __ jmp(&entry);
+ __ bind(&loop);
+ __ mov(receiver, Operand(ebp, kArgumentsOffset)); // load arguments
+
+ // Use inline caching to speed up access to arguments.
+ if (FLAG_vector_ics) {
+ __ mov(VectorLoadICDescriptor::SlotRegister(),
+ Immediate(Smi::FromInt(0)));
+ }
+ Handle<Code> ic = CodeFactory::KeyedLoadIC(masm->isolate()).code();
+ __ call(ic, RelocInfo::CODE_TARGET);
+ // It is important that we do not have a test instruction after the
+ // call. A test instruction after the call is used to indicate that
+ // we have generated an inline version of the keyed load. In this
+ // case, we know that we are not generating a test instruction next.
+
+ // Push the nth argument.
+ __ push(eax);
+
+ // Update the index on the stack and in register key.
+ __ mov(key, Operand(ebp, kIndexOffset));
+ __ add(key, Immediate(1 << kSmiTagSize));
+ __ mov(Operand(ebp, kIndexOffset), key);
+
+ __ bind(&entry);
+ __ cmp(key, Operand(ebp, kLimitOffset));
+ __ j(not_equal, &loop);
+
+ // Call the function.
+ Label call_proxy;
+ ParameterCount actual(eax);
+ __ Move(eax, key);
+ __ SmiUntag(eax);
+ __ mov(edi, Operand(ebp, kFunctionOffset));
+ __ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx);
+ __ j(not_equal, &call_proxy);
+ __ InvokeFunction(edi, actual, CALL_FUNCTION, NullCallWrapper());
+
+ frame_scope.GenerateLeaveFrame();
+ __ ret(3 * kPointerSize); // remove this, receiver, and arguments
+
+ // Call the function proxy.
+ __ bind(&call_proxy);
+ __ push(edi); // add function proxy as last argument
+ __ inc(eax);
+ __ Move(ebx, Immediate(0));
+ __ GetBuiltinEntry(edx, Builtins::CALL_FUNCTION_PROXY);
+ __ call(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(),
+ RelocInfo::CODE_TARGET);
+
+ // Leave internal frame.
+ }
+ __ ret(3 * kPointerSize); // remove this, receiver, and arguments
+}
+
+
+void Builtins::Generate_InternalArrayCode(MacroAssembler* masm) {
+ // ----------- S t a t e -------------
+ // -- eax : argc
+ // -- esp[0] : return address
+ // -- esp[4] : last argument
+ // -----------------------------------
+ Label generic_array_code;
+
+ // Get the InternalArray function.
+ __ LoadGlobalFunction(Context::INTERNAL_ARRAY_FUNCTION_INDEX, edi);
+
+ if (FLAG_debug_code) {
+ // Initial map for the builtin InternalArray function should be a map.
+ __ mov(ebx, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset));
+ // Will both indicate a NULL and a Smi.
+ __ test(ebx, Immediate(kSmiTagMask));
+ __ Assert(not_zero, kUnexpectedInitialMapForInternalArrayFunction);
+ __ CmpObjectType(ebx, MAP_TYPE, ecx);
+ __ Assert(equal, 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 -------------
+ // -- eax : argc
+ // -- esp[0] : return address
+ // -- esp[4] : last argument
+ // -----------------------------------
+ Label generic_array_code;
+
+ // Get the Array function.
+ __ LoadGlobalFunction(Context::ARRAY_FUNCTION_INDEX, edi);
+
+ if (FLAG_debug_code) {
+ // Initial map for the builtin Array function should be a map.
+ __ mov(ebx, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset));
+ // Will both indicate a NULL and a Smi.
+ __ test(ebx, Immediate(kSmiTagMask));
+ __ Assert(not_zero, kUnexpectedInitialMapForArrayFunction);
+ __ CmpObjectType(ebx, MAP_TYPE, ecx);
+ __ Assert(equal, kUnexpectedInitialMapForArrayFunction);
+ }
+
+ // Run the native code for the Array function called as a normal function.
+ // tail call a stub
+ __ mov(ebx, masm->isolate()->factory()->undefined_value());
+ ArrayConstructorStub stub(masm->isolate());
+ __ TailCallStub(&stub);
+}
+
+
+void Builtins::Generate_StringConstructCode(MacroAssembler* masm) {
+ // ----------- S t a t e -------------
+ // -- eax : number of arguments
+ // -- edi : constructor function
+ // -- esp[0] : return address
+ // -- esp[(argc - n) * 4] : arg[n] (zero-based)
+ // -- esp[(argc + 1) * 4] : receiver
+ // -----------------------------------
+ Counters* counters = masm->isolate()->counters();
+ __ IncrementCounter(counters->string_ctor_calls(), 1);
+
+ if (FLAG_debug_code) {
+ __ LoadGlobalFunction(Context::STRING_FUNCTION_INDEX, ecx);
+ __ cmp(edi, ecx);
+ __ Assert(equal, kUnexpectedStringFunction);
+ }
+
+ // Load the first argument into eax and get rid of the rest
+ // (including the receiver).
+ Label no_arguments;
+ __ test(eax, eax);
+ __ j(zero, &no_arguments);
+ __ mov(ebx, Operand(esp, eax, times_pointer_size, 0));
+ __ pop(ecx);
+ __ lea(esp, Operand(esp, eax, times_pointer_size, kPointerSize));
+ __ push(ecx);
+ __ mov(eax, ebx);
+
+ // Lookup the argument in the number to string cache.
+ Label not_cached, argument_is_string;
+ __ LookupNumberStringCache(eax, // Input.
+ ebx, // Result.
+ ecx, // Scratch 1.
+ edx, // Scratch 2.
+ ¬_cached);
+ __ IncrementCounter(counters->string_ctor_cached_number(), 1);
+ __ bind(&argument_is_string);
+ // ----------- S t a t e -------------
+ // -- ebx : argument converted to string
+ // -- edi : constructor function
+ // -- esp[0] : return address
+ // -----------------------------------
+
+ // Allocate a JSValue and put the tagged pointer into eax.
+ Label gc_required;
+ __ Allocate(JSValue::kSize,
+ eax, // Result.
+ ecx, // New allocation top (we ignore it).
+ no_reg,
+ &gc_required,
+ TAG_OBJECT);
+
+ // Set the map.
+ __ LoadGlobalFunctionInitialMap(edi, ecx);
+ if (FLAG_debug_code) {
+ __ cmpb(FieldOperand(ecx, Map::kInstanceSizeOffset),
+ JSValue::kSize >> kPointerSizeLog2);
+ __ Assert(equal, kUnexpectedStringWrapperInstanceSize);
+ __ cmpb(FieldOperand(ecx, Map::kUnusedPropertyFieldsOffset), 0);
+ __ Assert(equal, kUnexpectedUnusedPropertiesOfStringWrapper);
+ }
+ __ mov(FieldOperand(eax, HeapObject::kMapOffset), ecx);
+
+ // Set properties and elements.
+ Factory* factory = masm->isolate()->factory();
+ __ Move(ecx, Immediate(factory->empty_fixed_array()));
+ __ mov(FieldOperand(eax, JSObject::kPropertiesOffset), ecx);
+ __ mov(FieldOperand(eax, JSObject::kElementsOffset), ecx);
+
+ // Set the value.
+ __ mov(FieldOperand(eax, JSValue::kValueOffset), ebx);
+
+ // Ensure the object is fully initialized.
+ STATIC_ASSERT(JSValue::kSize == 4 * kPointerSize);
+
+ // We're done. Return.
+ __ ret(0);
+
+ // The argument was not found in the number to string cache. Check
+ // if it's a string already before calling the conversion builtin.
+ Label convert_argument;
+ __ bind(¬_cached);
+ STATIC_ASSERT(kSmiTag == 0);
+ __ JumpIfSmi(eax, &convert_argument);
+ Condition is_string = masm->IsObjectStringType(eax, ebx, ecx);
+ __ j(NegateCondition(is_string), &convert_argument);
+ __ mov(ebx, eax);
+ __ IncrementCounter(counters->string_ctor_string_value(), 1);
+ __ jmp(&argument_is_string);
+
+ // Invoke the conversion builtin and put the result into ebx.
+ __ bind(&convert_argument);
+ __ IncrementCounter(counters->string_ctor_conversions(), 1);
+ {
+ FrameScope scope(masm, StackFrame::INTERNAL);
+ __ push(edi); // Preserve the function.
+ __ push(eax);
+ __ InvokeBuiltin(Builtins::TO_STRING, CALL_FUNCTION);
+ __ pop(edi);
+ }
+ __ mov(ebx, eax);
+ __ jmp(&argument_is_string);
+
+ // Load the empty string into ebx, remove the receiver from the
+ // stack, and jump back to the case where the argument is a string.
+ __ bind(&no_arguments);
+ __ Move(ebx, Immediate(factory->empty_string()));
+ __ pop(ecx);
+ __ lea(esp, Operand(esp, kPointerSize));
+ __ push(ecx);
+ __ jmp(&argument_is_string);
+
+ // At this point the argument is already a string. Call runtime to
+ // create a string wrapper.
+ __ bind(&gc_required);
+ __ IncrementCounter(counters->string_ctor_gc_required(), 1);
+ {
+ FrameScope scope(masm, StackFrame::INTERNAL);
+ __ push(ebx);
+ __ CallRuntime(Runtime::kNewStringWrapper, 1);
+ }
+ __ ret(0);
+}
+
+
+static void ArgumentsAdaptorStackCheck(MacroAssembler* masm,
+ Label* stack_overflow) {
+ // ----------- S t a t e -------------
+ // -- eax : actual number of arguments
+ // -- ebx : expected number of arguments
+ // -- edi : function (passed through to callee)
+ // -----------------------------------
+ // 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.
+ ExternalReference real_stack_limit =
+ ExternalReference::address_of_real_stack_limit(masm->isolate());
+ __ mov(edx, Operand::StaticVariable(real_stack_limit));
+ // Make ecx the space we have left. The stack might already be overflowed
+ // here which will cause ecx to become negative.
+ __ mov(ecx, esp);
+ __ sub(ecx, edx);
+ // Make edx the space we need for the array when it is unrolled onto the
+ // stack.
+ __ mov(edx, ebx);
+ __ shl(edx, kPointerSizeLog2);
+ // Check if the arguments will overflow the stack.
+ __ cmp(ecx, edx);
+ __ j(less_equal, stack_overflow); // Signed comparison.
+}
+
+
+static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) {
+ __ push(ebp);
+ __ mov(ebp, esp);
+
+ // Store the arguments adaptor context sentinel.
+ __ push(Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
+
+ // Push the function on the stack.
+ __ push(edi);
+
+ // Preserve the number of arguments on the stack. Must preserve eax,
+ // ebx and ecx because these registers are used when copying the
+ // arguments and the receiver.
+ STATIC_ASSERT(kSmiTagSize == 1);
+ __ lea(edi, Operand(eax, eax, times_1, kSmiTag));
+ __ push(edi);
+}
+
+
+static void LeaveArgumentsAdaptorFrame(MacroAssembler* masm) {
+ // Retrieve the number of arguments from the stack.
+ __ mov(ebx, Operand(ebp, ArgumentsAdaptorFrameConstants::kLengthOffset));
+
+ // Leave the frame.
+ __ leave();
+
+ // Remove caller arguments from the stack.
+ STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0);
+ __ pop(ecx);
+ __ lea(esp, Operand(esp, ebx, times_2, 1 * kPointerSize)); // 1 ~ receiver
+ __ push(ecx);
+}
+
+
+void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
+ // ----------- S t a t e -------------
+ // -- eax : actual number of arguments
+ // -- ebx : expected number of arguments
+ // -- edi : function (passed through to callee)
+ // -----------------------------------
+
+ Label invoke, dont_adapt_arguments;
+ __ IncrementCounter(masm->isolate()->counters()->arguments_adaptors(), 1);
+
+ Label stack_overflow;
+ ArgumentsAdaptorStackCheck(masm, &stack_overflow);
+
+ Label enough, too_few;
+ __ mov(edx, FieldOperand(edi, JSFunction::kCodeEntryOffset));
+ __ cmp(eax, ebx);
+ __ j(less, &too_few);
+ __ cmp(ebx, SharedFunctionInfo::kDontAdaptArgumentsSentinel);
+ __ j(equal, &dont_adapt_arguments);
+
+ { // Enough parameters: Actual >= expected.
+ __ bind(&enough);
+ EnterArgumentsAdaptorFrame(masm);
+
+ // Copy receiver and all expected arguments.
+ const int offset = StandardFrameConstants::kCallerSPOffset;
+ __ lea(eax, Operand(ebp, eax, times_4, offset));
+ __ mov(edi, -1); // account for receiver
+
+ Label copy;
+ __ bind(©);
+ __ inc(edi);
+ __ push(Operand(eax, 0));
+ __ sub(eax, Immediate(kPointerSize));
+ __ cmp(edi, ebx);
+ __ j(less, ©);
+ __ jmp(&invoke);
+ }
+
+ { // Too few parameters: Actual < expected.
+ __ bind(&too_few);
+ EnterArgumentsAdaptorFrame(masm);
+
+ // Copy receiver and all actual arguments.
+ const int offset = StandardFrameConstants::kCallerSPOffset;
+ __ lea(edi, Operand(ebp, eax, times_4, offset));
+ // ebx = expected - actual.
+ __ sub(ebx, eax);
+ // eax = -actual - 1
+ __ neg(eax);
+ __ sub(eax, Immediate(1));
+
+ Label copy;
+ __ bind(©);
+ __ inc(eax);
+ __ push(Operand(edi, 0));
+ __ sub(edi, Immediate(kPointerSize));
+ __ test(eax, eax);
+ __ j(not_zero, ©);
+
+ // Fill remaining expected arguments with undefined values.
+ Label fill;
+ __ bind(&fill);
+ __ inc(eax);
+ __ push(Immediate(masm->isolate()->factory()->undefined_value()));
+ __ cmp(eax, ebx);
+ __ j(less, &fill);
+ }
+
+ // Call the entry point.
+ __ bind(&invoke);
+ // Restore function pointer.
+ __ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
+ __ call(edx);
+
+ // Store offset of return address for deoptimizer.
+ masm->isolate()->heap()->SetArgumentsAdaptorDeoptPCOffset(masm->pc_offset());
+
+ // Leave frame and return.
+ LeaveArgumentsAdaptorFrame(masm);
+ __ ret(0);
+
+ // -------------------------------------------
+ // Dont adapt arguments.
+ // -------------------------------------------
+ __ bind(&dont_adapt_arguments);
+ __ jmp(edx);
+
+ __ bind(&stack_overflow);
+ {
+ FrameScope frame(masm, StackFrame::MANUAL);
+ EnterArgumentsAdaptorFrame(masm);
+ __ InvokeBuiltin(Builtins::STACK_OVERFLOW, CALL_FUNCTION);
+ __ int3();
+ }
+}
+
+
+void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) {
+ // Lookup the function in the JavaScript frame.
+ __ mov(eax, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
+ {
+ FrameScope scope(masm, StackFrame::INTERNAL);
+ // Pass function as argument.
+ __ push(eax);
+ __ CallRuntime(Runtime::kCompileForOnStackReplacement, 1);
+ }
+
+ Label skip;
+ // If the code object is null, just return to the unoptimized code.
+ __ cmp(eax, Immediate(0));
+ __ j(not_equal, &skip, Label::kNear);
+ __ ret(0);
+
+ __ bind(&skip);
+
+ // Load deoptimization data from the code object.
+ __ mov(ebx, Operand(eax, Code::kDeoptimizationDataOffset - kHeapObjectTag));
+
+ // Load the OSR entrypoint offset from the deoptimization data.
+ __ mov(ebx, Operand(ebx, FixedArray::OffsetOfElementAt(
+ DeoptimizationInputData::kOsrPcOffsetIndex) - kHeapObjectTag));
+ __ SmiUntag(ebx);
+
+ // Compute the target address = code_obj + header_size + osr_offset
+ __ lea(eax, Operand(eax, ebx, times_1, Code::kHeaderSize - kHeapObjectTag));
+
+ // Overwrite the return address on the stack.
+ __ mov(Operand(esp, 0), eax);
+
+ // And "return" to the OSR entry point of the function.
+ __ ret(0);
+}
+
+
+void Builtins::Generate_OsrAfterStackCheck(MacroAssembler* masm) {
+ // We check the stack limit as indicator that recompilation might be done.
+ Label ok;
+ ExternalReference stack_limit =
+ ExternalReference::address_of_stack_limit(masm->isolate());
+ __ cmp(esp, Operand::StaticVariable(stack_limit));
+ __ j(above_equal, &ok, Label::kNear);
+ {
+ FrameScope scope(masm, StackFrame::INTERNAL);
+ __ CallRuntime(Runtime::kStackGuard, 0);
+ }
+ __ jmp(masm->isolate()->builtins()->OnStackReplacement(),
+ RelocInfo::CODE_TARGET);
+
+ __ bind(&ok);
+ __ ret(0);
+}
+
+#undef __
+}
+} // namespace v8::internal
+
+#endif // V8_TARGET_ARCH_X87