scalb man page on Darwin

scalb man page on Darwin

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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

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