Relax requirement from VFP3 to VFP2 where possible.

src/arm/codegen-arm.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 89 matching lines @@
     MacroAssembler* masm, Label* fail) {
   // ----------- S t a t e -------------
   //  -- r0    : value
   //  -- r1    : key
   //  -- r2    : receiver
   //  -- lr    : return address
   //  -- r3    : target map, scratch for subsequent call
   //  -- r4    : scratch (elements)
   // -----------------------------------
   Label loop, entry, convert_hole, gc_required, only_change_map, done;
-  bool vfp3_supported = CpuFeatures::IsSupported(VFP3);
+  bool vfp3_supported = CpuFeatures::IsSupported(VFP2);
 
   // Check for empty arrays, which only require a map transition and no changes
   // to the backing store.
   __ ldr(r4, FieldMemOperand(r2, JSObject::kElementsOffset));
   __ CompareRoot(r4, Heap::kEmptyFixedArrayRootIndex);
   __ b(eq, &only_change_map);
 
   __ push(lr);
   __ ldr(r5, FieldMemOperand(r4, FixedArray::kLengthOffset));
   // r4: source FixedArray
@@ skipping 83 matching lines @@
   __ b(fail);
 
   // Convert and copy elements.
   __ bind(&loop);
   __ ldr(r9, MemOperand(r3, 4, PostIndex));
   // r9: current element
   __ UntagAndJumpIfNotSmi(r9, r9, &convert_hole);
 
   // Normal smi, convert to double and store.
   if (vfp3_supported) {
-    CpuFeatures::Scope scope(VFP3);
+    CpuFeatures::Scope scope(VFP2);
     __ vmov(s0, r9);
     __ vcvt_f64_s32(d0, s0);
     __ vstr(d0, r7, 0);
     __ add(r7, r7, Operand(8));
   } else {
     FloatingPointHelper::ConvertIntToDouble(masm,
                                             r9,
                                             FloatingPointHelper::kCoreRegisters,
                                             d0,
                                             r0,
@@ skipping 223 matching lines @@
   // Ascii string.
   __ ldrb(result, MemOperand(string, index));
   __ bind(&done);
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM