ieee_functions man page on Tru64

Man page or keyword search:  
man Server   12896 pages
apropos Keyword Search (all sections)
Output format
Tru64 logo
[printable version]

ieee_functions(3)					     ieee_functions(3)

NAME
       copysign,  finite, fp_class, isnan, nextafter, unordered - Related mis‐
       cellaneous IEEE arithmetic functions.

SYNOPSIS
       #include <math.h>

       double copysign(
	       double x,
	       double y ); float copysignf(
	       float x,
	       float y ); long double copysignl(
	       long double x,
	       long double y ); int finite(
	       double x ); int finitef(
	       float x ); int finitel(
	       long double x ); int fp_class(
	       double x ); int fp_classf(
	       float x ); int fp_classl(
	       long double x ); int isnan(
	       double x ); int isnanf(
	       float x ); int isnanl(
	       long double x ); double nextafter(
	       double x,
	       double y ); float nextafterf(
	       float x,
	       float y ); long double nextafterl(
	       long double x,
	       long double y ); int unordered(
	       double x,
	       double y ); int unorderedf(
	       float x,
	       float y ); int unorderedl(
	       long double x,
	       long double y );

LIBRARY
       Math Library (libm)

STANDARDS
       Interfaces documented on this reference page conform to industry	 stan‐
       dards as follows:

       isnan():	 XPG4

       nextafter():  XPG4-UNIX

       Refer  to  the  standards(5)  reference page for more information about
       industry standards and associated tags.

DESCRIPTION
       The copysign(), copysignf(), and copysignl() functions  return  x  with
       the same sign as y. IEEE 754 requires copysign(x,NaN), copysignf(x,NaN)
       and copysignl(x,NaN) to return +x or -x.

       The finite(), finitef(), and finitel()  functions  return  the  integer
       value  1	 (True)	 or  0 (False).	 The finite(x), finitef(x),  and fini‐
       tel(x) functions return 1 when -infinity < x< +infinity. They return  0
       when |x| = infinity or x is a NaN.

       The  fp_class(),	 fp_classf(),  and fp_classl() functions determine the
       class of an IEEE floating-point value. They return one of the constants
       in the file <fp_class.h> and never cause an exception, even for signal‐
       ing NaNs. These routines implement the recommended function class(x) in
       the  appendix  of  the IEEE 754-1985 standard for binary floating-point
       arithmetic. The	constants  in  <fp_class.h>  refer  to	the  following
       classes of values:

       ─────────────────────────────────────────────
       Constant	       Class
       ─────────────────────────────────────────────
       FP_SNAN	       Signaling NaN (Not-a-Number)
       FP_QNAN	       Quiet NaN (Not-a-Number)
       FP_POS_INF      +infinity
       FP_NEG_INF      -infinity
       FP_POS_NORM     Positive normalized
       FP_NEG_NORM     Negative normalized
       FP_POS_DENORM   Positive denormalized
       FP_NEG_DENORM   Negative denormalized
       FP_POS_ZERO     +0.0 (positive zero)
       FP_NEG_ZERO     -0.0 (negative zero)
       ─────────────────────────────────────────────

       The isnan(), isnanf(), and isnanl() functions return the value 1 (True)
       if x is NaN (the IEEE floating point reserved not-a-number value); oth‐
       erwise, it returns the value 0 (False).

       The  nextafter(),  nextafterf(),	 and nextafterl() functions return the
       next machine-representable number from x in the direction of y.

       The unordered(), unorderedf(), and unorderedl()	functions  return  the
       value 1 (True) if either x or y or both is a NaN; otherwise, it returns
       the value 0 (False).

SEE ALSO
       drem(3),	 logb(3),  scalb(3),  rint(3),	sqrt(3),  and  ANSI/IEEE   Std
       754-1985, IEEE Standard for Binary Floating-Point Arithmetic

							     ieee_functions(3)
[top]
                             _         _         _ 
                            | |       | |       | |     
                            | |       | |       | |     
                         __ | | __ __ | | __ __ | | __  
                         \ \| |/ / \ \| |/ / \ \| |/ /  
                          \ \ / /   \ \ / /   \ \ / /   
                           \   /     \   /     \   /    
                            \_/       \_/       \_/ 
More information is available in HTML format for server Tru64

List of man pages available for Tru64

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net