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[/] [openrisc/] [trunk/] [gnu-stable/] [newlib-1.18.0/] [newlib/] [libm/] [math/] [wf_atanh.c] - Rev 858
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/* 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_ || isnan(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) */
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