diff options
Diffstat (limited to 'newlib/libm/math/w_jn.c')
| -rw-r--r-- | newlib/libm/math/w_jn.c | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/newlib/libm/math/w_jn.c b/newlib/libm/math/w_jn.c deleted file mode 100644 index 6cadc9a01..000000000 --- a/newlib/libm/math/w_jn.c +++ /dev/null @@ -1,141 +0,0 @@ - -/* @(#)w_jn.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. - * ==================================================== - */ - -/* - * wrapper jn(int n, double x), yn(int n, double x) - * floating point Bessel's function of the 1st and 2nd kind - * of order n - * - * Special cases: - * y0(0)=y1(0)=yn(n,0) = -inf with division by zero signal; - * y0(-ve)=y1(-ve)=yn(n,-ve) are NaN with invalid signal. - * Note 2. About jn(n,x), yn(n,x) - * For n=0, j0(x) is called, - * for n=1, j1(x) is called, - * for n<x, forward recursion us used starting - * from values of j0(x) and j1(x). - * for n>x, a continued fraction approximation to - * j(n,x)/j(n-1,x) is evaluated and then backward - * recursion is used starting from a supposed value - * for j(n,x). The resulting value of j(0,x) is - * compared with the actual value to correct the - * supposed value of j(n,x). - * - * yn(n,x) is similar in all respects, except - * that forward recursion is used for all - * values of n>1. - * - */ - -#include "fdlibm.h" -#include <errno.h> - -#ifndef _DOUBLE_IS_32BITS - -#ifdef __STDC__ - double jn(int n, double x) /* wrapper jn */ -#else - double jn(n,x) /* wrapper jn */ - double x; int n; -#endif -{ -#ifdef _IEEE_LIBM - return __ieee754_jn(n,x); -#else - double z; - struct exception exc; - z = __ieee754_jn(n,x); - if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z; - if(fabs(x)>X_TLOSS) { - /* jn(|x|>X_TLOSS) */ - exc.type = TLOSS; - exc.name = "jn"; - exc.err = 0; - exc.arg1 = n; - exc.arg2 = x; - exc.retval = 0.0; - if (_LIB_VERSION == _POSIX_) - errno = ERANGE; - else if (!matherr(&exc)) { - errno = ERANGE; - } - if (exc.err != 0) - errno = exc.err; - return exc.retval; - } else - return z; -#endif -} - -#ifdef __STDC__ - double yn(int n, double x) /* wrapper yn */ -#else - double yn(n,x) /* wrapper yn */ - double x; int n; -#endif -{ -#ifdef _IEEE_LIBM - return __ieee754_yn(n,x); -#else - double z; - struct exception exc; - z = __ieee754_yn(n,x); - if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z; - if(x <= 0.0){ - /* yn(n,0) = -inf or yn(x<0) = NaN */ -#ifndef HUGE_VAL -#define HUGE_VAL inf - double inf = 0.0; - - SET_HIGH_WORD(inf,0x7ff00000); /* set inf to infinite */ -#endif - exc.type = DOMAIN; /* should be SING for IEEE */ - exc.name = "yn"; - exc.err = 0; - exc.arg1 = n; - exc.arg2 = x; - if (_LIB_VERSION == _SVID_) - exc.retval = -HUGE; - else - exc.retval = -HUGE_VAL; - if (_LIB_VERSION == _POSIX_) - errno = EDOM; - else if (!matherr(&exc)) { - errno = EDOM; - } - if (exc.err != 0) - errno = exc.err; - return exc.retval; - } - if(x>X_TLOSS) { - /* yn(x>X_TLOSS) */ - exc.type = TLOSS; - exc.name = "yn"; - exc.err = 0; - exc.arg1 = n; - exc.arg2 = x; - exc.retval = 0.0; - if (_LIB_VERSION == _POSIX_) - errno = ERANGE; - else if (!matherr(&exc)) { - errno = ERANGE; - } - if (exc.err != 0) - errno = exc.err; - return exc.retval; - } else - return z; -#endif -} - -#endif /* defined(_DOUBLE_IS_32BITS) */ |