diff options
Diffstat (limited to 'newlib/libm/math/wf_atanh.c')
| -rw-r--r-- | newlib/libm/math/wf_atanh.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/newlib/libm/math/wf_atanh.c b/newlib/libm/math/wf_atanh.c new file mode 100644 index 00000000000..457cdc6e2a3 --- /dev/null +++ b/newlib/libm/math/wf_atanh.c @@ -0,0 +1,83 @@ +/* wf_atanh.c -- float version of w_atanh.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 atanhf(x) + */ + +#include "fdlibm.h" +#include <errno.h> + +#ifdef __STDC__ + float atanhf(float x) /* wrapper atanhf */ +#else + float atanhf(x) /* wrapper atanhf */ + float x; +#endif +{ +#ifdef _IEEE_LIBM + return __ieee754_atanhf(x); +#else + float z,y; + struct exception exc; + z = __ieee754_atanhf(x); + if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z; + y = fabsf(x); + if(y>=(float)1.0) { + if(y>(float)1.0) { + /* atanhf(|x|>1) */ + exc.type = DOMAIN; + exc.name = "atanhf"; + exc.err = 0; + exc.arg1 = exc.arg2 = (double)x; + exc.retval = 0.0/0.0; + if (_LIB_VERSION == _POSIX_) + errno = EDOM; + else if (!matherr(&exc)) { + errno = EDOM; + } + } else { + /* atanhf(|x|=1) */ + exc.type = SING; + exc.name = "atanhf"; + exc.err = 0; + exc.arg1 = exc.arg2 = (double)x; + exc.retval = x/0.0; /* sign(x)*inf */ + if (_LIB_VERSION == _POSIX_) + errno = EDOM; + else if (!matherr(&exc)) { + errno = EDOM; + } + } + if (exc.err != 0) + errno = exc.err; + return (float)exc.retval; + } else + return z; +#endif +} + +#ifdef _DOUBLE_IS_32BITS + +#ifdef __STDC__ + double atanh(double x) +#else + double atanh(x) + double x; +#endif +{ + return (double) atanhf((float) x); +} + +#endif /* defined(_DOUBLE_IS_32BITS) */ |