5.1.3 Integer - Fractional Format Mapping

The same twos complement N-bit word may represent an integer format value or a fractional format value.

For example, the 32-bit integer range [-2147483648, +2147483647] format maps to the Q31 range of [-1, 0.99999999954343387]. The following figure shows the mapping between these formats.

Figure 5-1. Mapping between 32-bit integer format and Q31 format