next up previous contents index
Next: Floating Point Exceptions Up: Floats Previous: Negative Zero   Contents   Index

Denormalized Floats

CMU Common Lisp supports IEEE denormalized floats. Denormalized floats provide a mechanism for gradual underflow. The Common Lisp float-precision function returns the actual precision of a denormalized float, which will be less than float-digits. Note that in order to generate (or even print) denormalized floats, trapping must be disabled for the underflow exception (see section float-traps.) The Common Lispleast-positive-format-float constants are denormalized.

[Function]
extensions: float-normalized-p
x

This function returns true if x is a denormalized float. x must be a float.



Peter Van Eynde 2000-02-08