Support all fast elements kinds in the major array operations.

src/x64/stub-cache-x64.cc

 // Copyright 2012 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 1469 matching lines @@
                   name, &miss);
 
   if (argc == 0) {
     // Noop, return the length.
     __ movq(rax, FieldOperand(rdx, JSArray::kLengthOffset));
     __ ret((argc + 1) * kPointerSize);
   } else {
     Label call_builtin;
 
     if (argc == 1) {  // Otherwise fall through to call builtin.
-      Label attempt_to_grow_elements, with_write_barrier;
+      Label attempt_to_grow_elements, with_write_barrier, check_double;
 
       // Get the elements array of the object.
       __ movq(rdi, FieldOperand(rdx, JSArray::kElementsOffset));
 
       // Check that the elements are in fast mode and writable.
       __ Cmp(FieldOperand(rdi, HeapObject::kMapOffset),
              factory()->fixed_array_map());
-      __ j(not_equal, &call_builtin);
+      __ j(not_equal, &check_double);
 
       // Get the array's length into rax and calculate new length.
       __ SmiToInteger32(rax, FieldOperand(rdx, JSArray::kLengthOffset));
       STATIC_ASSERT(FixedArray::kMaxLength < Smi::kMaxValue);
       __ addl(rax, Immediate(argc));
 
       // Get the elements' length into rcx.
       __ SmiToInteger32(rcx, FieldOperand(rdi, FixedArray::kLengthOffset));
 
       // Check if we could survive without allocation.
@@ skipping 10 matching lines @@
       // Store the value.
       __ movq(FieldOperand(rdi,
                            rax,
                            times_pointer_size,
                            FixedArray::kHeaderSize - argc * kPointerSize),
               rcx);
 
       __ Integer32ToSmi(rax, rax);  // Return new length as smi.
       __ ret((argc + 1) * kPointerSize);
 
+      __ bind(&check_double);
+
+      // Check that the elements are in double mode.
+      __ Cmp(FieldOperand(rdi, HeapObject::kMapOffset),
+             factory()->fixed_double_array_map());
+      __ j(not_equal, &call_builtin);
+
+      // Get the array's length into rax and calculate new length.
+      __ SmiToInteger32(rax, FieldOperand(rdx, JSArray::kLengthOffset));
+      STATIC_ASSERT(FixedArray::kMaxLength < Smi::kMaxValue);
+      __ addl(rax, Immediate(argc));
+
+      // Get the elements' length into rcx.
+      __ SmiToInteger32(rcx, FieldOperand(rdi, FixedArray::kLengthOffset));
+
+      // Check if we could survive without allocation.
+      __ cmpl(rax, rcx);
+      __ j(greater, &call_builtin);
+
+      __ movq(rcx, Operand(rsp, argc * kPointerSize));
+      __ StoreNumberToDoubleElements(
+          rcx, rdi, rax, xmm0, &call_builtin, argc * kDoubleSize);
+
+      // Save new length.
+      __ Integer32ToSmiField(FieldOperand(rdx, JSArray::kLengthOffset), rax);
+      __ ret((argc + 1) * kPointerSize);
+
       __ bind(&with_write_barrier);
 
       __ movq(rbx, FieldOperand(rdx, HeapObject::kMapOffset));
 
       if (FLAG_smi_only_arrays  && !FLAG_trace_elements_transitions) {
         Label fast_object, not_fast_object;
         __ CheckFastObjectElements(rbx, &not_fast_object, Label::kNear);
         __ jmp(&fast_object);
         // In case of fast smi-only, convert to fast object, otherwise bail out.
         __ bind(&not_fast_object);
         __ CheckFastSmiElements(rbx, &call_builtin);
+        __ Cmp(FieldOperand(rcx, HeapObject::kMapOffset),
+               factory()->heap_number_map());
+        __ j(equal, &call_builtin);
         // rdx: receiver
         // rbx: map
 
         Label try_holey_map;
         __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
                                                FAST_ELEMENTS,
                                                rbx,
                                                rdi,
                                                &try_holey_map);
 
@@ skipping 2555 matching lines @@
     __ jmp(ic_slow, RelocInfo::CODE_TARGET);
   }
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64