log2 man page on HP-UX

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log2(3M)							      log2(3M)

       log2(),	log2f(),  log2l(), log2w(), log2q() - logarithm base two func‐

   HP Integrity Server Only
       returns the logarithm base two of x.

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

   Integrity Server Only
       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.

       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 and link in the math library by speci‐
       fying on the compiler or linker command line.

       For more information, see the at the following site:

       If x is +INFINITY, returns +INFINITY.

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

       If x is less than zero, returns NaN and raises the invalid exception.

       If x is NaN, returns NaN.

       raises  the  inexact exception whenever a rounded result does not equal
       the mathematical result.

       If x is less than zero, sets to [EDOM].

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

       exp(3M), exp10(3M), log(3M), log1p(3M), log2(3M), pow(3M), math(5).

       :  ISO/IEC  C99	(including  Annex F, ``IEC 60559 floating-point arith‐


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