Handle non-power-of-2 divisors in division-like operations

src/assembler.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 1019 matching lines @@
 };
 
 class NullCallWrapper : public CallWrapper {
  public:
   NullCallWrapper() { }
   virtual ~NullCallWrapper() { }
   virtual void BeforeCall(int call_size) const { }
   virtual void AfterCall() const { }
 };
 
+
+// The multiplier and shift for signed division via multiplication, see Warren's
+// "Hacker's Delight", chapter 10.
+class MultiplierAndShift {
+ public:
+  explicit MultiplierAndShift(int32_t d);
+  int32_t multiplier() const { return multiplier_; }
+  int32_t shift() const { return shift_; }
+
+ private:
+  int32_t multiplier_;
+  int32_t shift_;
+};
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_ASSEMBLER_H_