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authorGabriel F. T. Gomes <gftg@linux.vnet.ibm.com>2016-12-13 22:42:51 -0200
committerGabriel F. T. Gomes <gftg@linux.vnet.ibm.com>2017-01-04 16:25:04 -0200
commitf67d78192c1be9d56d3a6f3fda4e0a70ae48c44d (patch)
treee08b1ae84e100cb5a17819f1bb9416a6c203d19b /math/w_jnl_compat.c
parent811de1a68863f7903341288a113b8c0ac7aa9c0e (diff)
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Move wrappers to libm-compat-calls-auto
This commit moves one step towards the deprecation of wrappers that use _LIB_VERSION / matherr / __kernel_standard functionality, by adding the suffix '_compat' to their filenames and adjusting Makefiles and #includes accordingly. New template wrappers that do not use such functionality will be added by future patches and will be first used by the float128 wrappers.
Diffstat (limited to 'math/w_jnl_compat.c')
-rw-r--r--math/w_jnl_compat.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/math/w_jnl_compat.c b/math/w_jnl_compat.c
new file mode 100644
index 0000000000..d17b047956
--- /dev/null
+++ b/math/w_jnl_compat.c
@@ -0,0 +1,91 @@
+/* w_jnl.c -- long double version of w_jn.c.
+ * Conversion to long double by Ulrich Drepper,
+ * Cygnus Support, drepper@cygnus.com.
+ */
+
+/*
+ * ====================================================
+ * 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.
+ * ====================================================
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: $";
+#endif
+
+/*
+ * 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 <math.h>
+#include <math_private.h>
+
+long double __jnl(int n, long double x) /* wrapper jnl */
+{
+#ifdef _IEEE_LIBM
+ return __ieee754_jnl(n,x);
+#else
+ long double z;
+ z = __ieee754_jnl(n,x);
+ if (_LIB_VERSION == _IEEE_
+ || _LIB_VERSION == _POSIX_
+ || isnan(x))
+ return z;
+ if(fabsl(x)>X_TLOSS) {
+ return __kernel_standard_l((double)n,x,238); /* jn(|x|>X_TLOSS,n) */
+ } else
+ return z;
+#endif
+}
+weak_alias (__jnl, jnl)
+
+long double __ynl(int n, long double x) /* wrapper ynl */
+{
+#ifdef _IEEE_LIBM
+ return __ieee754_ynl(n,x);
+#else
+ long double z;
+ z = __ieee754_ynl(n,x);
+ if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
+ if(x <= 0.0){
+ if(x==0.0)
+ /* d= -one/(x-x); */
+ return __kernel_standard_l((double)n,x,212);
+ else
+ /* d = zero/(x-x); */
+ return __kernel_standard_l((double)n,x,213);
+ }
+ if(x>X_TLOSS && _LIB_VERSION != _POSIX_) {
+ return __kernel_standard_l((double)n,x,239); /* yn(x>X_TLOSS,n) */
+ } else
+ return z;
+#endif
+}
+weak_alias (__ynl, ynl)