Use Rotate*() functions instead of doing this manually.

src/arm/simulator-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdarg.h>
 #include <stdlib.h>
 #include <cmath>
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/arm/constants-arm.h"
 #include "src/arm/simulator-arm.h"
 #include "src/assembler.h"
+#include "src/base/bits.h"
 #include "src/codegen.h"
 #include "src/disasm.h"
 
 #if defined(USE_SIMULATOR)
 
 // Only build the simulator if not compiling for real ARM hardware.
 namespace v8 {
 namespace internal {
 
 // This macro provides a platform independent use of sscanf. The reason for
@@ skipping 1473 matching lines @@
   }
   return result;
 }
 
 
 // Addressing Mode 1 - Data-processing operands:
 // Get the value based on the shifter_operand with immediate.
 int32_t Simulator::GetImm(Instruction* instr, bool* carry_out) {
   int rotate = instr->RotateValue() * 2;
   int immed8 = instr->Immed8Value();
-  int imm = (immed8 >> rotate) | (immed8 << (32 - rotate));
+  int imm = base::bits::RotateRight32(immed8, rotate);
   *carry_out = (rotate == 0) ? c_flag_ : (imm < 0);
   return imm;
 }
 
 
 static int count_bits(int bit_vector) {
   int count = 0;
   while (bit_vector != 0) {
     if ((bit_vector & 1) != 0) {
       count++;
@@ skipping 2498 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