Fault tolerant Newton-Raphson dividers using time shared TMR

The Newton-Raphson method is a popular means of performing division on modern processors, as it can utilize the multiplication hardware already on chip and converge quickly to a solution. However, high-precision multiplications are not required for the early iterations of the algorithm. Furthermore, rounding the quotient by computing the inverse function may not require a full precision computation. By using a smaller multiplier when less precision is required, and using the same multiplier with feedback paths when more precision is required, a smaller, and sometimes faster, divider can be realized. This approach lends itself to time shared triple modular redundancy, where space is saved over traditional TMR with a reasonable penalty to latency