diff options
Diffstat (limited to 'libm/src/w_acosh.c')
-rw-r--r-- | libm/src/w_acosh.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/libm/src/w_acosh.c b/libm/src/w_acosh.c new file mode 100644 index 0000000..e9dbebc --- /dev/null +++ b/libm/src/w_acosh.c @@ -0,0 +1,39 @@ + +/* @(#)w_acosh.c 1.3 95/01/18 */ +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunSoft, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + * + */ + +/* + * wrapper acosh(x) + */ + +#include "fdlibm.h" + +#ifdef __STDC__ + double acosh(double x) /* wrapper acosh */ +#else + double acosh(x) /* wrapper acosh */ + double x; +#endif +{ +#ifdef _IEEE_LIBM + return __ieee754_acosh(x); +#else + double z; + z = __ieee754_acosh(x); + if(_LIB_VERSION == _IEEE_ || isnan(x)) return z; + if(x<1.0) { + return __kernel_standard(x,x,29); /* acosh(x<1) */ + } else + return z; +#endif +} |