0,0 → 1,78 |
/* wf_cosh.c -- float version of w_cosh.c. |
* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. |
*/ |
|
/* |
* ==================================================== |
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
* |
* Developed at SunPro, a Sun Microsystems, Inc. business. |
* Permission to use, copy, modify, and distribute this |
* software is freely granted, provided that this notice |
* is preserved. |
* ==================================================== |
*/ |
|
/* |
* wrapper coshf(x) |
*/ |
|
#include "fdlibm.h" |
#include <errno.h> |
|
#ifdef __STDC__ |
float coshf(float x) /* wrapper coshf */ |
#else |
float coshf(x) /* wrapper coshf */ |
float x; |
#endif |
{ |
#ifdef _IEEE_LIBM |
return __ieee754_coshf(x); |
#else |
float z; |
struct exception exc; |
z = __ieee754_coshf(x); |
if(_LIB_VERSION == _IEEE_ || isnan(x)) return z; |
if(fabsf(x)>(float)8.9415985107e+01) { |
/* coshf(finite) overflow */ |
#ifndef HUGE_VAL |
#define HUGE_VAL inf |
double inf = 0.0; |
|
SET_HIGH_WORD(inf,0x7ff00000); /* set inf to infinite */ |
#endif |
exc.type = OVERFLOW; |
exc.name = "coshf"; |
exc.err = 0; |
exc.arg1 = exc.arg2 = (double)x; |
if (_LIB_VERSION == _SVID_) |
exc.retval = HUGE; |
else |
exc.retval = HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
errno = ERANGE; |
} |
if (exc.err != 0) |
errno = exc.err; |
return (float)exc.retval; |
} else |
return z; |
#endif |
} |
|
#ifdef _DOUBLE_IS_32BITS |
|
#ifdef __STDC__ |
double cosh(double x) |
#else |
double cosh(x) |
double x; |
#endif |
{ |
return (double) coshf((float) x); |
} |
|
#endif /* defined(_DOUBLE_IS_32BITS) */ |