A data processing circuit is disclosed which is configured to minimise the number of operations required by processing logic so as to reduce overall battery consumption. Arithmetic logic units (605, 606) are configurable to perform operations including the generation of exponent values. A separate comparing unit (618) is configurable to compare exponent values and to store one of said pair of exponent values dependent upon the result of said comparison. This comparison value then remains available for subsequent operations performed by associate circuitry, including arithmetic logic units (605, 606) and a normalisation circuit (619). A normalisation circuit determines the extent to which associate mantissa require shifting operations to be performed in order to normalise a block of floating point values.
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