MIPS: port Support array literals with FAST_DOUBLE_ELEMENTS ElementsKind.

src/mips/code-stubs-mips.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 244 matching lines @@
 }
 
 
 void FastCloneShallowArrayStub::Generate(MacroAssembler* masm) {
   // Stack layout on entry:
   // [sp]: constant elements.
   // [sp + kPointerSize]: literal index.
   // [sp + (2 * kPointerSize)]: literals array.
 
   // All sizes here are multiples of kPointerSize.
-  int elements_size = (length_ > 0) ? FixedArray::SizeFor(length_) : 0;
+  int elements_size = 0;
+  if (length_ > 0) {
+    elements_size = mode_ == CLONE_DOUBLE_ELEMENTS
+        ? FixedDoubleArray::SizeFor(length_)
+        : FixedArray::SizeFor(length_);
+  }
   int size = JSArray::kSize + elements_size;
 
   // Load boilerplate object into r3 and check if we need to create a
   // boilerplate.
   Label slow_case;
   __ lw(a3, MemOperand(sp, 2 * kPointerSize));
   __ lw(a0, MemOperand(sp, 1 * kPointerSize));
   __ Addu(a3, a3, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
   __ sll(t0, a0, kPointerSizeLog2 - kSmiTagSize);
   __ Addu(t0, a3, t0);
   __ lw(a3, MemOperand(t0));
   __ LoadRoot(t1, Heap::kUndefinedValueRootIndex);
   __ Branch(&slow_case, eq, a3, Operand(t1));
 
   if (FLAG_debug_code) {
     const char* message;
     Heap::RootListIndex expected_map_index;
     if (mode_ == CLONE_ELEMENTS) {
       message = "Expected (writable) fixed array";
       expected_map_index = Heap::kFixedArrayMapRootIndex;
+    } else if (mode_ == CLONE_DOUBLE_ELEMENTS) {
+      message = "Expected (writable) fixed double array";
+      expected_map_index = Heap::kFixedDoubleArrayMapRootIndex;
     } else {
       ASSERT(mode_ == COPY_ON_WRITE_ELEMENTS);
       message = "Expected copy-on-write fixed array";
       expected_map_index = Heap::kFixedCOWArrayMapRootIndex;
     }
     __ push(a3);
     __ lw(a3, FieldMemOperand(a3, JSArray::kElementsOffset));
     __ lw(a3, FieldMemOperand(a3, HeapObject::kMapOffset));
     __ LoadRoot(at, expected_map_index);
     __ Assert(eq, message, a3, Operand(at));
@@ skipping 19 matching lines @@
   }
 
   if (length_ > 0) {
     // Get hold of the elements array of the boilerplate and setup the
     // elements pointer in the resulting object.
     __ lw(a3, FieldMemOperand(a3, JSArray::kElementsOffset));
     __ Addu(a2, v0, Operand(JSArray::kSize));
     __ sw(a2, FieldMemOperand(v0, JSArray::kElementsOffset));
 
     // Copy the elements array.
+    ASSERT((elements_size % kPointerSize) == 0);
     __ CopyFields(a2, a3, a1.bit(), elements_size / kPointerSize);
   }
 
   // Return and remove the on-stack parameters.
   __ Addu(sp, sp, Operand(3 * kPointerSize));
   __ Ret();
 
   __ bind(&slow_case);
   __ TailCallRuntime(Runtime::kCreateArrayLiteralShallow, 3, 1);
 }
@@ skipping 7109 matching lines @@
 
   // Fall through when we need to inform the incremental marker.
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS