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/*

 * ====================================================

 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.

 *

 * Developed at SunPro, a Sun Microsystems, Inc. business.

 * Permission to use, copy, modify, and distribute this

 * software is freely granted, provided that this notice

 * is preserved.

 * ====================================================

 */

FUNCTION

       <>, <>---load exponent

	ldexp

INDEX

	ldexpf

       #include 

       double ldexp(double <[val]>, int <[exp]>);

       float ldexpf(float <[val]>, int <[exp]>);

       #include 

              double <[val]>;

              int <[exp]>;

              float <[val]>;

              int <[exp]>;

<> calculates the value

@ifnottex

<[val]> times 2 to the power <[exp]>.

@end ifnottex

@tex

$val\times 2^{exp}$.

@end tex

<> is identical, save that it takes and returns <>

rather than <> values.

<> returns the calculated value.

On underflow, <> and <> return 0.0.

On overflow, <> returns plus or minus <>.

<> is ANSI. <> is an extension.

#include 

	double ldexp(double value, int exp)

#else

	double ldexp(value, exp)

	double value; int exp;

#endif

{

	if(!finite(value)||value==0.0) return value;

	value = scalbn(value,exp);

	if(!finite(value)||value==0.0) errno = ERANGE;

	return value;

}