50 lines
929 B
C
50 lines
929 B
C
|
/*
|
||
|
|
* infinity () returns the representation of infinity.
|
||
|
|
* Added by Cygnus Support.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
FUNCTION
|
||
|
|
<<infinity>>, <<infinityf>>--representation of infinity
|
||
|
|
|
||
|
|
INDEX
|
||
|
|
infinity
|
||
|
|
INDEX
|
||
|
|
infinityf
|
||
|
|
|
||
|
|
ANSI_SYNOPSIS
|
||
|
|
#include <math.h>
|
||
|
|
double infinity(void);
|
||
|
|
float infinityf(void);
|
||
|
|
|
||
|
|
DESCRIPTION
|
||
|
|
<<infinity>> and <<infinityf>> return the special number IEEE
|
||
|
|
infinity in double- and single-precision arithmetic
|
||
|
|
respectively.
|
||
|
|
|
||
|
|
PORTABILITY
|
||
|
|
<<infinity>> and <<infinityf>> are neither standard C nor POSIX. C and
|
||
|
|
POSIX require macros HUGE_VAL and HUGE_VALF to be defined in math.h, which
|
||
|
|
Newlib defines to be infinities corresponding to these archaic infinity()
|
||
|
|
and infinityf() functions in floating-point implementations which do have
|
||
|
|
infinities.
|
||
|
|
|
||
|
|
QUICKREF
|
||
|
|
infinity - pure
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "fdlibm.h"
|
||
|
|
|
||
|
|
#ifndef _DOUBLE_IS_32BITS
|
||
|
|
|
||
|
|
double infinity()
|
||
|
|
{
|
||
|
|
double x;
|
||
|
|
|
||
|
|
INSERT_WORDS(x,0x7ff00000,0);
|
||
|
|
return x;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* _DOUBLE_IS_32BITS */
|