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  1. /* wf_asin.c -- float version of w_asin.c.
  2.  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  3.  */
  4.  
  5. /*
  6.  * ====================================================
  7.  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
  8.  *
  9.  * Developed at SunPro, a Sun Microsystems, Inc. business.
  10.  * Permission to use, copy, modify, and distribute this
  11.  * software is freely granted, provided that this notice
  12.  * is preserved.
  13.  * ====================================================
  14.  *
  15.  */
  16.  
  17. /*
  18.  * wrapper asinf(x)
  19.  */
  20.  
  21.  
  22. #include "fdlibm.h"
  23. #include <errno.h>
  24.  
  25. #ifdef __STDC__
  26.         float asinf(float x)            /* wrapper asinf */
  27. #else
  28.         float asinf(x)                  /* wrapper asinf */
  29.         float x;
  30. #endif
  31. {
  32. #ifdef _IEEE_LIBM
  33.         return __ieee754_asinf(x);
  34. #else
  35.         float z;
  36.         struct exception exc;
  37.         z = __ieee754_asinf(x);
  38.         if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
  39.         if(fabsf(x)>(float)1.0) {
  40.             /* asinf(|x|>1) */
  41.             exc.type = DOMAIN;
  42.             exc.name = "asinf";
  43.             exc.err = 0;
  44.             exc.arg1 = exc.arg2 = (double)x;
  45.             exc.retval = nan("");
  46.             if(_LIB_VERSION == _POSIX_)
  47.               errno = EDOM;
  48.             else if (!matherr(&exc)) {
  49.               errno = EDOM;
  50.             }
  51.             if (exc.err != 0)
  52.               errno = exc.err;
  53.             return (float)exc.retval;
  54.         } else
  55.             return z;
  56. #endif
  57. }
  58.  
  59. #ifdef _DOUBLE_IS_32BITS
  60.  
  61. #ifdef __STDC__
  62.         double asin(double x)
  63. #else
  64.         double asin(x)
  65.         double x;
  66. #endif
  67. {
  68.         return (double) asinf((float) x);
  69. }
  70.  
  71. #endif /* defined(_DOUBLE_IS_32BITS) */
  72.