2 * Written by J.T. Conklin <jtc@netbsd.org>.
3 * Changed to return -1 for -Inf by Ulrich Drepper <drepper@cygnus.com>.
7 #if defined(LIBM_SCCS) && !defined(lint)
8 static char rcsid[] = "$NetBSD: s_isinf.c,v 1.3 1995/05/11 23:20:14 jtc Exp $";
12 * isinf(x) returns 1 is x is inf, -1 if x is -inf, else 0;
17 #include "math_private.h"
23 EXTRACT_WORDS(hx,lx,x);
24 lx |= (hx & 0x7fffffff) ^ 0x7ff00000;
26 return ~(lx >> 31) & (hx >> 30);
28 weak_alias (__isinf, isinf)
30 strong_alias (__isinf, __isinfl)
31 weak_alias (__isinf, isinfl)