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/*
* Written by J.T. Conklin <jtc@netbsd.org>.
* Public domain.
*/
#include <sys/cdefs.h>
#if defined(LIBM_SCCS) && !defined(lint)
__RCSID("$NetBSD: s_isinf.c,v 1.4 1997/10/09 11:32:19 lukem Exp $");
#endif
/*
* isinf(x) returns 1 is x is inf, else 0;
* no branching!
*/
#include "math.h"
#include "math_private.h"
#ifdef __STDC__
int isinf(double x)
#else
int isinf(x)
double x;
#endif
{
int32_t hx,lx;
EXTRACT_WORDS(hx,lx,x);
hx &= 0x7fffffff;
hx ^= 0x7ff00000;
hx |= lx;
return (hx == 0);
}
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