X87: [stubs] Port FastNewObjectStub to TF.

src/x87/code-stubs-x87.cc

 // 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_X87
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 3112 matching lines @@
 
   Label fast_elements_case;
   __ cmp(ecx, Immediate(FAST_ELEMENTS));
   __ j(equal, &fast_elements_case);
   GenerateCase(masm, FAST_HOLEY_ELEMENTS);
 
   __ bind(&fast_elements_case);
   GenerateCase(masm, FAST_ELEMENTS);
 }
 
-void FastNewObjectStub::Generate(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- edi    : target
-  //  -- edx    : new target
-  //  -- esi    : context
-  //  -- esp[0] : return address
-  // -----------------------------------
-  __ AssertFunction(edi);
-  __ AssertReceiver(edx);
-
-  // Verify that the new target is a JSFunction.
-  Label new_object;
-  __ CmpObjectType(edx, JS_FUNCTION_TYPE, ebx);
-  __ j(not_equal, &new_object);
-
-  // Load the initial map and verify that it's in fact a map.
-  __ mov(ecx, FieldOperand(edx, JSFunction::kPrototypeOrInitialMapOffset));
-  __ JumpIfSmi(ecx, &new_object);
-  __ CmpObjectType(ecx, MAP_TYPE, ebx);
-  __ j(not_equal, &new_object);
-
-  // Fall back to runtime if the target differs from the new target's
-  // initial map constructor.
-  __ cmp(edi, FieldOperand(ecx, Map::kConstructorOrBackPointerOffset));
-  __ j(not_equal, &new_object);
-
-  // Allocate the JSObject on the heap.
-  Label allocate, done_allocate;
-  __ movzx_b(ebx, FieldOperand(ecx, Map::kInstanceSizeOffset));
-  __ lea(ebx, Operand(ebx, times_pointer_size, 0));
-  __ Allocate(ebx, eax, edi, no_reg, &allocate, NO_ALLOCATION_FLAGS);
-  __ bind(&done_allocate);
-
-  // Initialize the JSObject fields.
-  __ mov(FieldOperand(eax, JSObject::kMapOffset), ecx);
-  __ mov(FieldOperand(eax, JSObject::kPropertiesOffset),
-         masm->isolate()->factory()->empty_fixed_array());
-  __ mov(FieldOperand(eax, JSObject::kElementsOffset),
-         masm->isolate()->factory()->empty_fixed_array());
-  STATIC_ASSERT(JSObject::kHeaderSize == 3 * kPointerSize);
-  __ lea(ebx, FieldOperand(eax, JSObject::kHeaderSize));
-
-  // ----------- S t a t e -------------
-  //  -- eax    : result (tagged)
-  //  -- ebx    : result fields (untagged)
-  //  -- edi    : result end (untagged)
-  //  -- ecx    : initial map
-  //  -- esi    : context
-  //  -- esp[0] : return address
-  // -----------------------------------
-
-  // Perform in-object slack tracking if requested.
-  Label slack_tracking;
-  STATIC_ASSERT(Map::kNoSlackTracking == 0);
-  __ test(FieldOperand(ecx, Map::kBitField3Offset),
-          Immediate(Map::ConstructionCounter::kMask));
-  __ j(not_zero, &slack_tracking, Label::kNear);
-  {
-    // Initialize all in-object fields with undefined.
-    __ LoadRoot(edx, Heap::kUndefinedValueRootIndex);
-    __ InitializeFieldsWithFiller(ebx, edi, edx);
-    __ Ret();
-  }
-  __ bind(&slack_tracking);
-  {
-    // Decrease generous allocation count.
-    STATIC_ASSERT(Map::ConstructionCounter::kNext == 32);
-    __ sub(FieldOperand(ecx, Map::kBitField3Offset),
-           Immediate(1 << Map::ConstructionCounter::kShift));
-
-    // Initialize the in-object fields with undefined.
-    __ movzx_b(edx, FieldOperand(ecx, Map::kUnusedPropertyFieldsOffset));
-    __ neg(edx);
-    __ lea(edx, Operand(edi, edx, times_pointer_size, 0));
-    __ LoadRoot(edi, Heap::kUndefinedValueRootIndex);
-    __ InitializeFieldsWithFiller(ebx, edx, edi);
-
-    // Initialize the remaining (reserved) fields with one pointer filler map.
-    __ movzx_b(edx, FieldOperand(ecx, Map::kUnusedPropertyFieldsOffset));
-    __ lea(edx, Operand(ebx, edx, times_pointer_size, 0));
-    __ LoadRoot(edi, Heap::kOnePointerFillerMapRootIndex);
-    __ InitializeFieldsWithFiller(ebx, edx, edi);
-
-    // Check if we can finalize the instance size.
-    Label finalize;
-    STATIC_ASSERT(Map::kSlackTrackingCounterEnd == 1);
-    __ test(FieldOperand(ecx, Map::kBitField3Offset),
-            Immediate(Map::ConstructionCounter::kMask));
-    __ j(zero, &finalize, Label::kNear);
-    __ Ret();
-
-    // Finalize the instance size.
-    __ bind(&finalize);
-    {
-      FrameScope scope(masm, StackFrame::INTERNAL);
-      __ Push(eax);
-      __ Push(ecx);
-      __ CallRuntime(Runtime::kFinalizeInstanceSize);
-      __ Pop(eax);
-    }
-    __ Ret();
-  }
-
-  // Fall back to %AllocateInNewSpace.
-  __ bind(&allocate);
-  {
-    FrameScope scope(masm, StackFrame::INTERNAL);
-    __ SmiTag(ebx);
-    __ Push(ecx);
-    __ Push(ebx);
-    __ CallRuntime(Runtime::kAllocateInNewSpace);
-    __ Pop(ecx);
-  }
-  __ movzx_b(ebx, FieldOperand(ecx, Map::kInstanceSizeOffset));
-  __ lea(edi, Operand(eax, ebx, times_pointer_size, 0));
-  STATIC_ASSERT(kHeapObjectTag == 1);
-  __ dec(edi);
-  __ jmp(&done_allocate);
-
-  // Fall back to %NewObject.
-  __ bind(&new_object);
-  __ PopReturnAddressTo(ecx);
-  __ Push(edi);
-  __ Push(edx);
-  __ PushReturnAddressFrom(ecx);
-  __ TailCallRuntime(Runtime::kNewObject);
-}
-
 void FastNewRestParameterStub::Generate(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- edi    : function
   //  -- esi    : context
   //  -- ebp    : frame pointer
   //  -- esp[0] : return address
   // -----------------------------------
   __ AssertFunction(edi);
 
   // Make edx point to the JavaScript frame.
@@ skipping 914 matching lines @@
                            kStackUnwindSpace, nullptr, return_value_operand,
                            NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87