ARM: Fix the use of the ToBooleanStub when VFP3 is not available

src/arm/code-stubs-arm.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 1278 matching lines @@
 
   // Call the native; it returns -1 (less), 0 (equal), or 1 (greater)
   // tagged as a small integer.
   __ InvokeBuiltin(native, JUMP_JS);
 }
 
 
 // This stub does not handle the inlined cases (Smis, Booleans, undefined).
 // The stub returns zero for false, and a non-zero value for true.
 void ToBooleanStub::Generate(MacroAssembler* masm) {
+  // This stub uses VFP3 instructions.
+  ASSERT(CpuFeatures::IsEnabled(VFP3));
+
   Label false_result;
   Label not_heap_number;
   Register scratch = r9.is(tos_) ? r7 : r9;
 
   __ LoadRoot(ip, Heap::kNullValueRootIndex);
   __ cmp(tos_, ip);
   __ b(eq, &false_result);
 
   // HeapNumber => false iff +0, -0, or NaN.
   __ ldr(scratch, FieldMemOperand(tos_, HeapObject::kMapOffset));
@@ skipping 4818 matching lines @@
   __ strb(untagged_value, MemOperand(external_pointer, untagged_key));
   __ Ret();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM