logb(3m) [hpux man page]

logb(3M)																  logb(3M)

NAME

       logb(), logbf(), logbl(), logbw(), logbq() - radix-independent exponent functions

SYNOPSIS

   HP Integrity Server Only
DESCRIPTION

       The  function computes the exponent of the floating point value x.  Formally, the return value is the integral part of log base r of |x| as
       a signed floating point value, for nonzero x, where r is the radix of the machine's floating-point arithmetic.  The radix r is 2  on  HP-UX
       systems.

       If x is denormal, it is treated as though it were normalized, before the exponent is determined.

   Integrity Server Only
       is a version of it takes a argument and returns a result.

       is a version of it takes a argument and returns a result.

       is an version of it takes an argument and returns an result.

       is equivalent to on HP-UX systems.

USAGE

       To use these functions, compile either with the default option or with the and options.

       To use (for Integrity servers) or compile also with

       Make  sure  your program includes Link in the math library by specifying on the compiler or linker command line.  For more information, see
       the at the following site:

RETURN VALUE

       Upon successful completion, returns the exponent of x.

       If x is NaN, returns NaN.

       If x returns +INFINITY.

       If x is zero, returns (equal to -INFINITY) and raises the divide-by-zero floating-point exception.

ERRORS

       If x is zero, sets to [EDOM].

   Integrity Server Only
       HP-UX functions on Integrity servers do not set by default.  For setting, compile with the option.

SEE ALSO

       frexp(3M), ilogb(3M), scalb(3M), scalbn(3M), scalbln(3M), math(5).

STANDARDS CONFORMANCE

       : SVID3, XPG4.2, ANSI C, ISO/IEC C99 (including Annex F, ``IEC 60559 floating-point arithmetic'')

       : ISO/IEC C99 (including Annex F, ``IEC 60559 floating-point arithmetic'')

																	  logb(3M)

scalb(3M)																 scalb(3M)

NAME

       scalb(), scalbf(), scalbl(), scalbw(), scalbq() - scale exponent of a radix-independent floating-point number

SYNOPSIS

   HP Integrity Server Only
DESCRIPTION

       The  function  returns  where  r  is  the  radix of the machine's floating-point arithmetic.  The radix r is 2 on all PA-RISC and Integrity
       servers.

   Integrity Server Only
       is a version of it takes arguments and returns a result.

       is a version of it takes arguments and returns a result.

       is an version of it takes arguments and returns an result.

       is equivalent to on HP-UX systems.

USAGE

       To use these functions, compile either with the default option or with the and options.

       To use (for Integrity servers) or compile also with the option.

       Make sure your program includes Link in the math library by specifying on the compiler or linker command line.

RETURN VALUE

       and are equivalent.

       If y returns x.

       If x is +0 and y is +INFINITY, returns a NaN and raises the invalid exception.

       If x is +0 and y is an integer less than +INFINITY, returns +0.

       If x is +INFINITY and y is an integer greater than -INFINITY, returns +INFINITY.

       If x is finite and positive-signed and y is -INFINITY, returns +0.

       If x is positive and y is +INFINITY, returns +INFINITY.

       If x is +INFINITY and y is -INFINITY, returns a NaN.

       If x or y is NaN, returns a NaN.

       returns a properly signed infinity in lieu of a value whose magnitude is too large, and raises the overflow and inexact exceptions.

       raises the underflow and inexact exceptions whenever a result is tiny (essentially denormal or zero) and thereby suffers loss of  accuracy,
       and may raise those exceptions if the result is merely tiny.

ERRORS

       If the correct value would overflow or underflow, sets to [ERANGE].

   Integrity Server Only
       HP-UX functions on Integrity servers do not set by default.  For setting, compile with the option.

SEE ALSO

       scalbn(3M), scalbln(3M), ilogb(3M), ldexp(3M), logb(3M), math(5).

STANDARDS CONFORMANCE

       : ISO/IEC C99 (including Annex F, ``IEC 60559 floating-point arithmetic'')

																	 scalb(3M)