Prototype:
                     
i32 @__nv_double2int_rz(double %d) 
Description:
                     
                     Convert the double-precision floating point value x to a signed integer value in round-towards-zero mode. 
                     
                     Returns:
                     Returns converted value. 
                     
                     Library Availability:
                     
                     Compute 2.0: Yes
                     Compute 3.0: Yes
                     Compute 3.5: Yes