diff options
Diffstat (limited to 'lib/msun/src/w_y0.c')
-rw-r--r-- | lib/msun/src/w_y0.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/lib/msun/src/w_y0.c b/lib/msun/src/w_y0.c new file mode 100644 index 0000000..d2da8ce --- /dev/null +++ b/lib/msun/src/w_y0.c @@ -0,0 +1,50 @@ +/* from: @(#)w_j0.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[] = "$FreeBSD$"; +#endif + +/* + * wrapper y0(double x) + */ + +#include "math.h" +#include "math_private.h" + +#ifdef __STDC__ + double y0(double x) /* wrapper y0 */ +#else + double y0(x) /* wrapper y0 */ + double x; +#endif +{ +#ifdef _IEEE_LIBM + return __ieee754_y0(x); +#else + double z; + z = __ieee754_y0(x); + if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z; + if(x <= 0.0){ + if(x==0.0) + /* d= -one/(x-x); */ + return __kernel_standard(x,x,8); + else + /* d = zero/(x-x); */ + return __kernel_standard(x,x,9); + } + if(x>X_TLOSS) { + return __kernel_standard(x,x,35); /* y0(x>X_TLOSS) */ + } else + return z; +#endif +} |