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authorSergey Cherkashin <4erkashin@list.ru>2017-10-03 15:26:34 +0300
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2017-11-03 20:23:10 +0100
commitea38f4d89c9698895b1cf53a5946429dc1d8bbaa (patch)
treee05828ca1fedf55f104b837bc9c44215c2978e99 /libm/w_hypotl.c
parent68de9946e914d8c30dcc6667a059ea59e5b74cac (diff)
math: add exception handling functionality
According to standards SVID and SYSV. Modified lgamma calling in case when 'signgam' variable should not be used. Signed-off-by: Waldemar Brodkorb <wbx@uclibc-ng.org>
Diffstat (limited to 'libm/w_hypotl.c')
-rw-r--r--libm/w_hypotl.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/libm/w_hypotl.c b/libm/w_hypotl.c
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+/* w_hypotl.c -- long double version of w_hypot.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.
+ * ====================================================
+ */
+
+/*
+ * wrapper hypotl(x,y)
+ */
+
+#include <math.h>
+#include "math_private.h"
+
+#if !defined __NO_LONG_DOUBLE_MATH
+long double
+hypotl(long double x, long double y)
+{
+# if __UCLIBC_HAS_FENV__
+ long double z;
+ z = (long double) __ieee754_hypot((double) x, (double) y);
+ if(__builtin_expect(!isfinite(z), 0)
+ && isfinite(x) && isfinite(y) && _LIB_VERSION != _IEEE_)
+ return __kernel_standard_l(x, y, 204); /* hypot overflow */
+
+ return z;
+# else
+ return (long double) __ieee754_hypot((double) x, (double) y);
+# endif /* __UCLIBC_HAS_FENV__ */
+}
+#endif /* __NO_LONG_DOUBLE_MATH */