Function

Summary

Rounds the given float to single-precision format (32 bits) and returns it as a double-float (64 bits).

Package

lispworks

Signature

round-to-single-precision float => float

Arguments

float

A float

Values

float

A double-float with single-float precision.

Description

The argument is rounded to single-precision format (32 bits) and returned as a double-float (64 bits). This function allows you to model the rounding behaviour of a machine or implementation that performs 32-bit floating point arithmetic.

The default size on Windows and Linux is 64 bits as specified by the IEEE standard.

On Unix, LispWorks supports 3 floating point formats, short-float, single-float and double-float. If this function is called with a single-float or a short-float, it returns the equivalent double-float, that is, it is the same as doing
(coerce float 'double-float)

Example

CL-USER 197 > pi

3.141592653589793D0

CL-USER 198 > round-to-single-precision pi

3.1415927410125732D0