Apparatus and method for processing floating point values

A method executed on a computing device of storing an intermediate representation of a floating point value, the method comprising:

• storing a representation of a significand of the floating point value in a significand section of the intermediate representation, wherein a less significant portion of an exponent of the floating point value defines a range of positions within the significand section where the representation of the significand is to be stored;
• storing a representation of a more significant portion of the exponent of the floating point value in an exponent section of the intermediate representation, which indicates a selected window of multiple contiguous windows spanning a value range of a format of the floating point value,
• wherein a first portion of the significand section corresponds to the selected window and wherein a second portion of the significand section corresponds to an overlap into a further window which is adjacent to and lower in the value range than the selected window;
• and
• storing, separate to the representation of the significand, values for populating the second portion of the significand section when the representation of the significand of the floating point value is moved to a higher window which is adjacent to and higher in the value range than the selected window.