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ieee_test(3)

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RocketLink!--> Man page versions: OpenBSD FreeBSD Others



IEEE_TEST(3)              OpenBSD Programmer's Manual             IEEE_TEST(3)

NAME
     logb, logbf, scalb, scalbf, significand, significandf - IEEE test func-
     tions



SYNOPSIS
     #include <math.h>

     double
     logb(double x);

     float
     logbf(float x);

     double
     scalb(double x, double n);

     float
     scalbf(float x, float n);

     double
     significand(double x);

     float
     significandf(float x);

DESCRIPTION
     These functions allow users to test conformance to IEEE Std754-1985.
     Their use is not otherwise recommended.

     logb(x) returns x's exponent n, a signed integer converted to double-pre-
     cision floating-point.  logb(+-infinity) = +infinity; logb(0) = -infinity
     with a division by zero exception.

     scalbn(x, n) returns x*(2**n) computed by exponent manipulation.

     significand(x) returns sig, where x := sig * 2**n with 1 <= sig < 2.
     significand(x) is not defined when x is 0, +-infinity, or NaN.

SEE ALSO
     ieee(3),  math(3)

STANDARDS
     IEEE Std754-1985

OpenBSD 2.6                     March 10, 1994                               1

Source: OpenBSD 2.6 man pages. Copyright: Portions are copyrighted by BERKELEY
SOFTWARE DESIGN, INC., The Regents of the University of California, Massachusetts
Institute of Technology, Free Software Foundation, FreeBSD Inc., and others.



(Corrections, notes, and links courtesy of RocketAware.com)


[Detailed Topics]
FreeBSD Sources for ieee_test(3) functions
OpenBSD sources for ieee_test(3)


[Overview Topics]

Up to: Floating point math - Floating point math (including complex numbers)


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