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

   1 /* wf_cosh.c -- float version of w_cosh.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  * wrapper coshf(x)
  18  */
  19
  20 #include "fdlibm.h"
  21 #include <errno.h>
  22
  23 #ifdef __STDC__
  24         float coshf(float x)            /* wrapper coshf */
  25 #else
  26         float coshf(x)                  /* wrapper coshf */
  27         float x;
  28 #endif
  29 {
  30 #ifdef _IEEE_LIBM
  31         return __ieee754_coshf(x);
  32 #else
  33         float z;
  34         struct exception exc;
  35         z = __ieee754_coshf(x);
  36         if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z;
  37         if(fabsf(x)>(float)8.9415985107e+01) {
  38             /* coshf(finite) overflow */
  39 #ifndef HUGE_VAL
  40 #define HUGE_VAL inf
  41             double inf = 0.0;
  42
  43             SET_HIGH_WORD(inf,0x7ff00000);      /* set inf to infinite */
  44 #endif
  45             exc.type = OVERFLOW;
  46             exc.name = "coshf";
  47             exc.err = 0;
  48             exc.arg1 = exc.arg2 = (double)x;
  49             if (_LIB_VERSION == _SVID_)
  50                exc.retval = HUGE;
  51             else
  52                exc.retval = HUGE_VAL;
  53             if (_LIB_VERSION == _POSIX_)
  54                errno = ERANGE;
  55             else if (!matherr(&exc)) {
  56                errno = ERANGE;
  57             }
  58             if (exc.err != 0)
  59                errno = exc.err;
  60             return (float)exc.retval;
  61         } else
  62             return z;
  63 #endif
  64 }
  65
  66 #ifdef _DOUBLE_IS_32BITS
  67
  68 #ifdef __STDC__
  69         double cosh(double x)
  70 #else
  71         double cosh(x)
  72         double x;
  73 #endif
  74 {
  75         return (double) coshf((float) x);
  76 }
  77
  78 #endif /* defined(_DOUBLE_IS_32BITS) */