mirror of https://github.com/mkerrisk/man-pages
63 lines
2.0 KiB
Groff
63 lines
2.0 KiB
Groff
.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
|
|
.\"
|
|
.\" Permission is granted to make and distribute verbatim copies of this
|
|
.\" manual provided the copyright notice and this permission notice are
|
|
.\" preserved on all copies.
|
|
.\"
|
|
.\" Permission is granted to copy and distribute modified versions of this
|
|
.\" manual under the conditions for verbatim copying, provided that the
|
|
.\" entire resulting derived work is distributed under the terms of a
|
|
.\" permission notice identical to this one.
|
|
.\"
|
|
.\" Since the Linux kernel and libraries are constantly changing, this
|
|
.\" manual page may be incorrect or out-of-date. The author(s) assume no
|
|
.\" responsibility for errors or omissions, or for damages resulting from
|
|
.\" the use of the information contained herein. The author(s) may not
|
|
.\" have taken the same level of care in the production of this manual,
|
|
.\" which is licensed free of charge, as they might when working
|
|
.\" professionally.
|
|
.\"
|
|
.\" Formatted or processed versions of this manual, if unaccompanied by
|
|
.\" the source, must acknowledge the copyright and authors of this work.
|
|
.\"
|
|
.\" References consulted:
|
|
.\" Linux libc source code
|
|
.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
|
|
.\" 386BSD man pages
|
|
.\" Modified 1993-07-24 by Rik Faith (faith@cs.unc.edu)
|
|
.\" Modified 2004-10-31 by aeb
|
|
.\"
|
|
.TH LDEXP 3 2004-10-31 "" "Linux Programmer's Manual"
|
|
.SH NAME
|
|
ldexp, ldexpf, ldexpl \- multiply floating-point number by integral power of 2
|
|
.SH SYNOPSIS
|
|
.nf
|
|
.B #include <math.h>
|
|
.sp
|
|
.BI "double ldexp(double " x ", int " exp );
|
|
.br
|
|
.BI "float ldexpf(float " x ", int " exp );
|
|
.br
|
|
.BI "long double ldexpl(long double " x ", int " exp );
|
|
.fi
|
|
.sp
|
|
Link with \fI\-lm\fP.
|
|
.SH DESCRIPTION
|
|
The
|
|
.BR ldexp ()
|
|
function returns the result of multiplying the floating-point number
|
|
.I x
|
|
by 2 raised to the power
|
|
.IR exp .
|
|
.SH "CONFORMING TO"
|
|
SVr4, 4.3BSD, C89.
|
|
The
|
|
.I float
|
|
and
|
|
.I "long double"
|
|
variants are C99 requirements.
|
|
.SH "SEE ALSO"
|
|
.BR frexp (3),
|
|
.BR modf (3),
|
|
.BR scalb (3)
|