sysdeps/generic/w_atan2l.c

   1 /* w_atan2l.c -- long double version of w_atan2.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  * wrapper atan2l(y,x)
  23  */
  24
  25 #include "math.h"
  26 #include "math_private.h"
  27
  28
  29 #ifdef __STDC__
  30         long double __atan2l(long double y, long double x) /* wrapper atan2l */
  31 #else
  32         long double __atan2l(y,x)                       /* wrapper atan2l */
  33         long double y,x;
  34 #endif
  35 {
  36 #ifdef _IEEE_LIBM
  37         return __ieee754_atan2l(y,x);
  38 #else
  39         long double z;
  40         z = __ieee754_atan2l(y,x);
  41         if(_LIB_VERSION != _SVID_||__isnanl(x)||__isnanl(y)) return z;
  42         if(x==0.0&&y==0.0)
  43           return __kernel_standard(y,x,203); /* atan2(+-0,+-0) */
  44         return z;
  45 #endif
  46 }
  47 weak_alias (__atan2l, atan2l)