1. Apparatus for processing data comprising: floating point processing circuitry to perform floating point processing operations; and monitoring circuitry coupled to said floating point processing circuitry to monitor floating point numbers processed over a plurality of floating point processing operations, each floating point processing operation generating a separate floating point result value, and to store exponent limit data indicative of at least one of a maximum exponent value and a minimum exponent value among exponents of said floating point numbers processed over said plurality of floating point processing operations.