Single-precision

Single-precision floating point numbers have the following format:

   31    30    23   22           0
|-----|----------|----------------|
| SIGN|  EXPONENT|  FRACTION      |
 ----------------------------------
                    ^
                    binary point

 ---------------------------------------------------------------------
 Field        Position     Full name
 ---------------------------------------------------------------------
 sign         31           sign bit (0 == positive, 1 == negative)
 exponent     30-23        exponent (biased by 127)
 fraction     22-0         fraction (bits to right of binary point)