ARM: Enable VFP default NaN mode

src/arm/code-stubs-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 3479 matching lines @@
   // already at '+ 8' from the current instruction but return is after three
   // instructions so add another 4 to pc to get the return address.
   {
     // Prevent literal pool emission before return address.
     Assembler::BlockConstPoolScope block_const_pool(masm);
     masm->add(lr, pc, Operand(4));
     __ str(lr, MemOperand(sp, 0));
     masm->Jump(r5);
   }
 
+  __ VFPEnsureFPSCRState(r2);
+
   if (always_allocate) {
     // It's okay to clobber r2 and r3 here. Don't mess with r0 and r1
     // though (contain the result).
     __ mov(r2, Operand(scope_depth));
     __ ldr(r3, MemOperand(r2));
     __ sub(r3, r3, Operand(1));
     __ str(r3, MemOperand(r2));
   }
 
   // check for failure result
@@ skipping 141 matching lines @@
 
   // Called from C, so do not pop argc and args on exit (preserve sp)
   // No need to save register-passed args
   // Save callee-saved registers (incl. cp and fp), sp, and lr
   __ stm(db_w, sp, kCalleeSaved | lr.bit());
 
   // Save callee-saved vfp registers.
   __ vstm(db_w, sp, kFirstCalleeSavedDoubleReg, kLastCalleeSavedDoubleReg);
   // Set up the reserved register for 0.0.
   __ vmov(kDoubleRegZero, 0.0);
+  __ VFPEnsureFPSCRState(r4);
 
   // Get address of argv, see stm above.
   // r0: code entry
   // r1: function
   // r2: receiver
   // r3: argc
 
   // Set up argv in r4.
   int offset_to_argv = (kNumCalleeSaved + 1) * kPointerSize;
   offset_to_argv += kNumDoubleCalleeSaved * kDoubleSize;
@@ skipping 3161 matching lines @@
 
   // Push return address (accessible to GC through exit frame pc).
   // Note that using pc with str is deprecated.
   Label start;
   __ bind(&start);
   __ add(ip, pc, Operand(Assembler::kInstrSize));
   __ str(ip, MemOperand(sp, 0));
   __ Jump(target);  // Call the C++ function.
   ASSERT_EQ(Assembler::kInstrSize + Assembler::kPcLoadDelta,
             masm->SizeOfCodeGeneratedSince(&start));
+  __ VFPEnsureFPSCRState(r2);
 }
 
 
 void NameDictionaryLookupStub::GenerateNegativeLookup(MacroAssembler* masm,
                                                       Label* miss,
                                                       Label* done,
                                                       Register receiver,
                                                       Register properties,
                                                       Handle<Name> name,
                                                       Register scratch0) {
@@ skipping 580 matching lines @@
   __ ldr(r5, FieldMemOperand(r1, JSObject::kElementsOffset));
   __ add(r6, r5, Operand(r3, LSL, kPointerSizeLog2 - kSmiTagSize));
   __ str(r0, FieldMemOperand(r6, FixedArray::kHeaderSize));
   __ Ret();
 
   // Array literal has ElementsKind of FAST_DOUBLE_ELEMENTS.
   __ bind(&double_elements);
   __ ldr(r5, FieldMemOperand(r1, JSObject::kElementsOffset));
   __ StoreNumberToDoubleElements(r0, r3,
                                  // Overwrites all regs after this.
-                                 r5, r6, r7, r9, r2,
+                                 r5, r9, r6, r7, r2,
                                  &slow_elements);
   __ Ret();
 }
 
 
 void StubFailureTrampolineStub::Generate(MacroAssembler* masm) {
   CEntryStub ces(1, fp_registers_ ? kSaveFPRegs : kDontSaveFPRegs);
   __ Call(ces.GetCode(masm->isolate()), RelocInfo::CODE_TARGET);
   int parameter_count_offset =
       StubFailureTrampolineFrame::kCallerStackParameterCountFrameOffset;
@@ skipping 65 matching lines @@
 
   __ Pop(lr, r5, r1);
   __ Ret();
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM