compiler/mlib/w_asin.c

   1 /* @(#)w_asin.c 5.1 93/09/24 */
   2 /*
   3  * ====================================================
   4  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   5  *
   6  * Developed at SunPro, a Sun Microsystems, Inc. business.
   7  * Permission to use, copy, modify, and distribute this
   8  * software is freely granted, provided that this notice
   9  * is preserved.
  10  * ====================================================
  11  */
  12
  13 #ifndef lint
  14 static char rcsid[] = "$FreeBSD: src/lib/msun/src/w_asin.c,v 1.5 1999/08/28 00:06:58 peter Exp $";
  15 #endif
  16
  17 /*
  18  * wrapper asin(x)
  19  */
  20
  21
  22 #include "math.h"
  23 #include "math_private.h"
  24
  25
  26 double
  27 asin(double x)          /* wrapper asin */
  28 {
  29 #ifdef _IEEE_LIBM
  30         return __ieee754_asin(x);
  31 #else
  32         double z;
  33         z = __ieee754_asin(x);
  34         if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
  35         if(fabs(x)>1.0) {
  36                 return __kernel_standard(x,x,2); /* asin(|x|>1) */
  37         } else
  38             return z;
  39 #endif
  40 }