1 files changed, 129 insertions, 0 deletions
diff --git a/V8Binding/v8/src/arm/macro-assembler-arm.cc b/V8Binding/v8/src/arm/macro-assembler-arm.cc
index 65c2a3e..c77209e 100644
--- a/V8Binding/v8/src/arm/macro-assembler-arm.cc
+++ b/V8Binding/v8/src/arm/macro-assembler-arm.cc
@@ -768,11 +768,139 @@ void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg,
 }
 
 
+void MacroAssembler::AllocateObjectInNewSpace(int object_size,
+                                              Register result,
+                                              Register scratch1,
+                                              Register scratch2,
+                                              Label* gc_required,
+                                              AllocationFlags flags) {
+  ASSERT(!result.is(scratch1));
+  ASSERT(!scratch1.is(scratch2));
+
+  // Load address of new object into result and allocation top address into
+  // scratch1.
+  ExternalReference new_space_allocation_top =
+      ExternalReference::new_space_allocation_top_address();
+  mov(scratch1, Operand(new_space_allocation_top));
+  if ((flags & RESULT_CONTAINS_TOP) == 0) {
+    ldr(result, MemOperand(scratch1));
+  } else {
+#ifdef DEBUG
+    // Assert that result actually contains top on entry. scratch2 is used
+    // immediately below so this use of scratch2 does not cause difference with
+    // respect to register content between debug and release mode.
+    ldr(scratch2, MemOperand(scratch1));
+    cmp(result, scratch2);
+    Check(eq, "Unexpected allocation top");
+#endif
+  }
+
+  // Calculate new top and bail out if new space is exhausted. Use result
+  // to calculate the new top.
+  ExternalReference new_space_allocation_limit =
+      ExternalReference::new_space_allocation_limit_address();
+  mov(scratch2, Operand(new_space_allocation_limit));
+  ldr(scratch2, MemOperand(scratch2));
+  add(result, result, Operand(object_size * kPointerSize));
+  cmp(result, Operand(scratch2));
+  b(hi, gc_required);
+
+  // Update allocation top. result temporarily holds the new top,
+  str(result, MemOperand(scratch1));
+
+  // Tag and adjust back to start of new object.
+  if ((flags & TAG_OBJECT) != 0) {
+    sub(result, result, Operand((object_size * kPointerSize) -
+                                kHeapObjectTag));
+  } else {
+    sub(result, result, Operand(object_size * kPointerSize));
+  }
+}
+
+
+void MacroAssembler::AllocateObjectInNewSpace(Register object_size,
+                                              Register result,
+                                              Register scratch1,
+                                              Register scratch2,
+                                              Label* gc_required,
+                                              AllocationFlags flags) {
+  ASSERT(!result.is(scratch1));
+  ASSERT(!scratch1.is(scratch2));
+
+  // Load address of new object into result and allocation top address into
+  // scratch1.
+  ExternalReference new_space_allocation_top =
+      ExternalReference::new_space_allocation_top_address();
+  mov(scratch1, Operand(new_space_allocation_top));
+  if ((flags & RESULT_CONTAINS_TOP) == 0) {
+    ldr(result, MemOperand(scratch1));
+  } else {
+#ifdef DEBUG
+    // Assert that result actually contains top on entry. scratch2 is used
+    // immediately below so this use of scratch2 does not cause difference with
+    // respect to register content between debug and release mode.
+    ldr(scratch2, MemOperand(scratch1));
+    cmp(result, scratch2);
+    Check(eq, "Unexpected allocation top");
+#endif
+  }
+
+  // Calculate new top and bail out if new space is exhausted. Use result
+  // to calculate the new top. Object size is in words so a shift is required to
+  // get the number of bytes
+  ExternalReference new_space_allocation_limit =
+      ExternalReference::new_space_allocation_limit_address();
+  mov(scratch2, Operand(new_space_allocation_limit));
+  ldr(scratch2, MemOperand(scratch2));
+  add(result, result, Operand(object_size, LSL, kPointerSizeLog2));
+  cmp(result, Operand(scratch2));
+  b(hi, gc_required);
+
+  // Update allocation top. result temporarily holds the new top,
+  str(result, MemOperand(scratch1));
+
+  // Adjust back to start of new object.
+  sub(result, result, Operand(object_size, LSL, kPointerSizeLog2));
+
+  // Tag object if requested.
+  if ((flags & TAG_OBJECT) != 0) {
+    add(result, result, Operand(kHeapObjectTag));
+  }
+}
+
+
+void MacroAssembler::UndoAllocationInNewSpace(Register object,
+                                              Register scratch) {
+  ExternalReference new_space_allocation_top =
+      ExternalReference::new_space_allocation_top_address();
+
+  // Make sure the object has no tag before resetting top.
+  and_(object, object, Operand(~kHeapObjectTagMask));
+#ifdef DEBUG
+  // Check that the object un-allocated is below the current top.
+  mov(scratch, Operand(new_space_allocation_top));
+  ldr(scratch, MemOperand(scratch));
+  cmp(object, scratch);
+  Check(lt, "Undo allocation of non allocated memory");
+#endif
+  // Write the address of the object to un-allocate as the current top.
+  mov(scratch, Operand(new_space_allocation_top));
+  str(object, MemOperand(scratch));
+}
+
+
 void MacroAssembler::CompareObjectType(Register function,
                                        Register map,
                                        Register type_reg,
                                        InstanceType type) {
   ldr(map, FieldMemOperand(function, HeapObject::kMapOffset));
+  CompareInstanceType(map, type_reg, type);
+}
+
+
+void MacroAssembler::CompareInstanceType(Register map,
+                                         Register type_reg,
+                                         InstanceType type) {
   ldrb(type_reg, FieldMemOperand(map, Map::kInstanceTypeOffset));
   cmp(type_reg, Operand(type));
 }
@@ -1022,4 +1150,5 @@ void MacroAssembler::Abort(const char* msg) {
   // will not return here
 }
 
+
 } }  // namespace v8::internal