toolchain/gcc/newlib/libm/math/wf_asin.c

   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_ || isnanf(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 = 0.0;
  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) */