invsqrtw man page on HP-UX

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rsqrt(3M)							     rsqrt(3M)

       rsqrt(), rsqrtf(), rsqrtl(), rsqrtw(), rsqrtq(), invsqrt(), invsqrtf(),
       invsqrtl(), invsqrtw(), invsqrtq() - reciprocal square root functions

       returns the reciprocal of the non-negative square root of x.

       The expression is intended as a higher performance alternative  to  The
       two expressions are comparably accurate, but do not compute exactly the
       same value in every case.  For example, can be  just  slightly  greater
       than 1, in rare cases.

       is  equivalent  to It is provided in HP-UX to facilitate importing code
       from other platforms.

       and are versions of and they take a argument and returns a result.

       and are a version of and they take a argument and returns a result.

       and are an version of and they take an argument and returns an result.

       On HP-UX systems, is equivalent to and is equivalent to

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

       To use or compile also with the option.

       To use any of these functions, make sure your program includes and link
       in the math library by specifying on the	 compiler  or  linker  command

       If x and raises the divide-by-zero exception.

       If x is +INFINITY, returns +0.

       If x is NaN, returns NaN.

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

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

       No errors are defined.

       sqrt(3M), math(5).

       These functions are not specified by any standard.

			   HP Integrity Server Only		     rsqrt(3M)

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