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scalbn(3)                BSD Library Functions Manual                scalbn(3)


NAME

     scalbn, scalbln


SYNOPSIS

     #include <math.h>

     double
     scalbn(double x, int n);

     long double
     scalbnl(long double x, int n);

     float
     scalbnf(float x, int n);

     double
     scalbln(double x, long int n);

     long double
     scalblnl(long double x, long int n);

     float
     scalblnf(float x, long int n);


DESCRIPTION

     The scalbn() , and scalbln() functions return x*(2**n) computed by expo-
     nent manipulation.


SPECIAL VALUES

     scalbn(+-0, n) returns +-0.

     scalbn(x, 0) returns x.

     scalbn(+-infinity, n) returns +-infinity.

     scalbln() has the same special values.


NOTE

     The scalb() function is deprecated.  scalbn() should be used instead.


VECTOR OPERATIONS

     If you need to apply the scalbn() functions to SIMD vectors or arrays,
     using the following function provided by the Accelerate.framework may
     give significantly better performance:

     #include <Accelerate/Accelerate.h>

     vFloat vscalbf(vFloat x, vSInt32);


SEE ALSO

     math(3), ldexp(3)


STANDARDS

     The scalbn() and scalbln() functions conform to ISO/IEC 9899:2011.

BSD                              July 02, 2008                             BSD

Mac OS X 10.9.1 - Generated Thu Jan 9 06:06:59 CST 2014
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