mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-15 01:21:06 +00:00
38 lines
947 B
C
38 lines
947 B
C
/* @(#)s_finite.c 5.1 93/09/24 */
|
|
/*
|
|
* ====================================================
|
|
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
|
*
|
|
* Developed at SunPro, a Sun Microsystems, Inc. business.
|
|
* Permission to use, copy, modify, and distribute this
|
|
* software is freely granted, provided that this notice
|
|
* is preserved.
|
|
* ====================================================
|
|
*/
|
|
|
|
#if defined(LIBM_SCCS) && !defined(lint)
|
|
static char rcsid[] = "$NetBSD: s_finite.c,v 1.8 1995/05/10 20:47:17 jtc Exp $";
|
|
#endif
|
|
|
|
/*
|
|
* finite(x) returns 1 is x is finite, else 0;
|
|
* no branching!
|
|
*/
|
|
|
|
#include <math.h>
|
|
#include <math_private.h>
|
|
|
|
#undef __finite
|
|
int __finite(double x)
|
|
{
|
|
int32_t hx;
|
|
GET_HIGH_WORD(hx,x);
|
|
return (int)((u_int32_t)((hx&0x7fffffff)-0x7ff00000)>>31);
|
|
}
|
|
hidden_def (__finite)
|
|
weak_alias (__finite, finite)
|
|
#ifdef NO_LONG_DOUBLE
|
|
strong_alias (__finite, __finitel)
|
|
weak_alias (__finite, finitel)
|
|
#endif
|