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Diffstat (limited to 'lib/msun/src/w_atanh.c')
| -rw-r--r-- | lib/msun/src/w_atanh.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/lib/msun/src/w_atanh.c b/lib/msun/src/w_atanh.c new file mode 100644 index 0000000000000..fb6b6735f5f0c --- /dev/null +++ b/lib/msun/src/w_atanh.c @@ -0,0 +1,46 @@ +/* @(#)w_atanh.c 5.1 93/09/24 */ +/* + * ==================================================== + * 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. + * ==================================================== + */ + +#ifndef lint +static char rcsid[] = "$Id: w_atanh.c,v 1.1.1.1 1994/05/06 00:20:10 gclarkii Exp $"; +#endif + +/* + * wrapper atanh(x) + */ + +#include "math.h" + + +#ifdef __STDC__ + double atanh(double x) /* wrapper atanh */ +#else + double atanh(x) /* wrapper atanh */ + double x; +#endif +{ +#ifdef _IEEE_LIBM + return __ieee754_atanh(x); +#else + double z,y; + z = __ieee754_atanh(x); + if(_LIB_VERSION == _IEEE_ || isnan(x)) return z; + y = fabs(x); + if(y>=1.0) { + if(y>1.0) + return __kernel_standard(x,x,30); /* atanh(|x|>1) */ + else + return __kernel_standard(x,x,31); /* atanh(|x|==1) */ + } else + return z; +#endif +} |