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>

1 files changed, 37 insertions, 0 deletions

diff --git a/libm/w_coshf.c b/libm/w_coshf.c
new file mode 100644
index 000000000..940d77876
--- /dev/null
+++ b/libm/w_coshf.c
@@ -0,0 +1,37 @@
+/* w_coshf.c -- float version of w_cosh.c.
+ * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
+ * Optimizations by Ulrich Drepper <drepper@gmail.com>, 2011.
+ */
+
+/*
+ * ====================================================
+ * 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 coshf(x)
+ */
+
+#include <math.h>
+#include "math_private.h"
+
+float
+coshf (float x)
+{
+#if __UCLIBC_HAS_FENV__
+	float z = (float) __ieee754_cosh ((double) x);
+	if (__builtin_expect (!isfinite (z), 0) && isfinite (x)
+	    && _LIB_VERSION != _IEEE_)
+		return __kernel_standard_f (x, x, 105); /* cosh overflow */
+
+	return z;
+#else
+	return (float) __ieee754_cosh ((double) x);
+#endif
+}
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