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      1 /*
      2  * Written by J.T. Conklin <jtc (at) NetBSD.org>.
      3  * Public domain.
      4  */
      5 
      6 #include <sys/cdefs.h>
      7 #if defined(LIBM_SCCS) && !defined(lint)
      8 __RCSID("$NetBSD: s_isinff.c,v 1.6 2003/07/26 19:25:06 salo Exp $");
      9 #endif
     10 
     11 /*
     12  * isinff(x) returns 1 is x is inf, else 0;
     13  * no branching!
     14  */
     15 
     16 #include "math.h"
     17 #include "math_private.h"
     18 
     19 int
     20 isinff(float x)
     21 {
     22 	int32_t ix;
     23 	GET_FLOAT_WORD(ix,x);
     24 	ix &= 0x7fffffff;
     25 	ix ^= 0x7f800000;
     26 	return (ix == 0);
     27 }
     28