xref: /openbsd-src/lib/libm/man/scalbn.3 (revision 9f1be2b6be65d2ab47863ae5d56ddbe2b8094a6e)

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.\"     from: @(#)ieee.3	6.4 (Berkeley) 5/6/91
.\"
.Dd $Mdocdate: April 26 2016 $
.Dt SCALBN 3
.Os
.Sh NAME
.Nm scalbln ,
.Nm scalblnf ,
.Nm scalblnl ,
.Nm scalbn ,
.Nm scalbnf ,
.Nm scalbnl
.Nd adjust exponent by radix
.Sh SYNOPSIS
.In math.h
.Ft double
.Fn scalbln "double x" "long n"
.Ft float
.Fn scalblnf "float x" "long n"
.Ft long double
.Fn scalblnl "long double x" "long n"
.Ft double
.Fn scalbn "double x" "int n"
.Ft float
.Fn scalbnf "float x" "int n"
.Ft long double
.Fn scalbnl "long double x" "int n"
.Sh DESCRIPTION
.Fn scalbln
and
.Fn scalbn
return
.Fa x Ns *(2** Ns Fa n )
computed by exponent manipulation.
The
.Fn scalblnf
and
.Fn scalbnf
functions are single precision versions of
.Fn scalbln
and
.Fn scalbn ,
respectively.
The
.Fn scalblnl
and
.Fn scalbnl
functions are extended precision versions of
.Fn scalbln
and
.Fn scalbn ,
respectively.
.Sh STANDARDS
.St -ieee754
.Sh HISTORY
The
.Nm scalbln ,
.Nm scalblnf
and
.Nm scalblnl
functions appeared in
.Ox 4.7 .
The
.Nm scalbn ,
.Nm scalbnf ,
and
.Nm scalbnl ,
functions appeared in
.Bx 4.3 ,
.Nx 1.1
and
.Ox 4.5 ,
respectively.