sysdeps/libm-ieee754/s_finitel.c

   1 /* s_finitel.c -- long double version of s_finite.c.
   2  * Conversion to long double by Ulrich Drepper,
   3  * Cygnus Support, drepper@cygnus.com.
   4  */
   5
   6 /*
   7  * ====================================================
   8  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   9  *
  10  * Developed at SunPro, a Sun Microsystems, Inc. business.
  11  * Permission to use, copy, modify, and distribute this
  12  * software is freely granted, provided that this notice
  13  * is preserved.
  14  * ====================================================
  15  */
  16
  17 #if defined(LIBM_SCCS) && !defined(lint)
  18 static char rcsid[] = "$NetBSD: $";
  19 #endif
  20
  21 /*
  22  * finitel(x) returns 1 is x is finite, else 0;
  23  * no branching!
  24  */
  25
  26 #include "math.h"
  27 #include "math_private.h"
  28
  29 #ifdef __STDC__
  30         int __finite(long double x)
  31 #else
  32         int __finite(x)
  33         long double x;
  34 #endif
  35 {
  36         int32_t exp;
  37         GET_LDOUBLE_EXP(exp,x);
  38         return (int)((u_int32_t)((exp&0x7fff)-0x7fff)>>15);
  39 }
  40 weak_alias (__finitel, finitel)