Fix fixed-point vcvt_f64_s32 immediate value encoding

src/arm/simulator-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 2918 matching lines @@
         double dd_value = -dm_value;
         dd_value = canonicalizeNaN(dd_value);
         set_d_register_from_double(vd, dd_value);
       } else if ((instr->Opc2Value() == 0x7) && (instr->Opc3Value() == 0x3)) {
         DecodeVCVTBetweenDoubleAndSingle(instr);
       } else if ((instr->Opc2Value() == 0x8) && (instr->Opc3Value() & 0x1)) {
         DecodeVCVTBetweenFloatingPointAndInteger(instr);
       } else if ((instr->Opc2Value() == 0xA) && (instr->Opc3Value() == 0x3) &&
                  (instr->Bit(8) == 1)) {
         // vcvt.f64.s32 Dd, Dd, #<fbits>
-        int fraction_bits = 32 - ((instr->Bit(5) << 4) | instr->Bits(3, 0));
+        int fraction_bits = 32 - ((instr->Bits(3, 0) << 1) | instr->Bit(5));
         int fixed_value = get_sinteger_from_s_register(vd * 2);
         double divide = 1 << fraction_bits;
         set_d_register_from_double(vd, fixed_value / divide);
       } else if (((instr->Opc2Value() >> 1) == 0x6) &&
                  (instr->Opc3Value() & 0x1)) {
         DecodeVCVTBetweenFloatingPointAndInteger(instr);
       } else if (((instr->Opc2Value() == 0x4) || (instr->Opc2Value() == 0x5)) &&
                  (instr->Opc3Value() & 0x1)) {
         DecodeVCMP(instr);
       } else if (((instr->Opc2Value() == 0x1)) && (instr->Opc3Value() == 0x3)) {
@@ skipping 902 matching lines @@
   uintptr_t address = *stack_slot;
   set_register(sp, current_sp + sizeof(uintptr_t));
   return address;
 }
 
 } }  // namespace v8::internal
 
 #endif  // USE_SIMULATOR
 
 #endif  // V8_TARGET_ARCH_ARM