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#ifndef __nanojit_NativeCommon__
#define __nanojit_NativeCommon__

namespace nanojit
{
    // In debug builds, Register is defined as a non-integer type to avoid
    // possible mix-ups with RegisterMask and integer offsets.  In non-debug
    // builds, it's defined as an integer just in case some compilers fail to
    // optimize single-element structs in the obvious way.
    //
    // Note that in either case, a Register can be initialized like so:
    //
    //   Register r = { 0 };
    //
    // In the debug case it's a struct initializer, in the non-debug case it's
    // a scalar initializer.
    //
    // XXX: The exception to all the above is that if NJ_USE_UINT32_REGISTER
    // is defined, the back-end is responsible for defining its own Register
    // type, which will probably be an enum.  This is just to give all the
    // back-ends a chance to transition smoothly.
#if defined(NJ_USE_UINT32_REGISTER)
    #define REGNUM(r) (r)

#elif defined(DEBUG)
    struct Register {
        uint32_t n;     // the register number
    };

    static inline uint32_t REGNUM(Register r) {
        return r.n;
    }

    static inline Register REGINC(Register r) {
        r.n++;
        return r;
    }

    static inline bool operator==(Register r1, Register r2)
    {
        return r1.n == r2.n;
    }

    static inline bool operator!=(Register r1, Register r2)
    {
        return r1.n != r2.n;
    }
#else
    typedef uint32_t Register;

    static inline uint32_t REGNUM(Register r) {
        return r;
    }

    static inline Register REGINC(Register r) {
        return r+1;
    }
#endif
} // namespace nanojit

#endif // __nanojit_NativeCommon__
