FLI type descriptor
double and Cfloat types. fli
:lisp-float &optional float-type
float-type ::= :single | :double
The C type to convert between. The default is:single.
:lisp-float type converts between any Lisp float and either the Cfloat or the Cdouble type. The default is to convert to the Cfloat type, but by specifying:double for float-type, conversion occurs between any Lisp float and the Cdouble type. :double :float