diff options
Diffstat (limited to 'math/w_j0.c')
| -rw-r--r-- | math/w_j0.c | 104 |
1 files changed, 46 insertions, 58 deletions
diff --git a/math/w_j0.c b/math/w_j0.c index 59b6b66..3613520 100644 --- a/math/w_j0.c +++ b/math/w_j0.c @@ -1,75 +1,63 @@ -/* @(#)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. - * ==================================================== - */ +/* Copyright (C) 2011 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@gmail.com>, 2011. -#if defined(LIBM_SCCS) && !defined(lint) -static char rcsid[] = "$NetBSD: w_j0.c,v 1.6 1995/05/10 20:49:11 jtc Exp $"; -#endif + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. -/* - * wrapper j0(double x), y0(double x) - */ + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ +#include <fenv.h> #include <math.h> #include <math_private.h> -#ifdef __STDC__ - double j0(double x) /* wrapper j0 */ -#else - double j0(x) /* wrapper j0 */ - double x; -#endif + +/* wrapper j0 */ +double +j0 (double x) { -#ifdef _IEEE_LIBM - return __ieee754_j0(x); -#else - double z = __ieee754_j0(x); - if(_LIB_VERSION == _IEEE_ || __isnan(x)) return z; - if(fabs(x)>X_TLOSS) { - return __kernel_standard(x,x,34); /* j0(|x|>X_TLOSS) */ - } else - return z; -#endif + if (__builtin_expect (fabs (x) > X_TLOSS, 0) && _LIB_VERSION != _IEEE_) + /* j0(|x|>X_TLOSS) */ + return __kernel_standard (x, x, 34); + + return __ieee754_j0 (x); } #ifdef NO_LONG_DOUBLE strong_alias (j0, j0l) #endif -#ifdef __STDC__ - double y0(double x) /* wrapper y0 */ -#else - double y0(x) /* wrapper y0 */ - double x; -#endif +/* wrapper y0 */ +double +y0 (double x) { -#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 + if (__builtin_expect (x <= 0.0 || x > X_TLOSS, 0) && _LIB_VERSION != _IEEE_) + { + if (x < 0.0) + { + /* d = zero/(x-x) */ + feraiseexcept (FE_INVALID); + return __kernel_standard (x, x, 9); + } + else if (x == 0.0) + /* d = -one/(x-x) */ + return __kernel_standard (x, x, 8); + else + /* y0(x>X_TLOSS) */ + return __kernel_standard (x, x, 35); + } + + return __ieee754_y0 (x); } #ifdef NO_LONG_DOUBLE strong_alias (y0, y0l) |