xref: /dflybsd-src/contrib/openbsd_libm/man/scalbn.3 (revision 4382f29d99a100bd77a81697c2f699c11f6a472a)

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.\"     from: @(#)ieee.3	6.4 (Berkeley) 5/6/91
.\"
.Dd $Mdocdate: June 5 2013 $
.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.