import newlib-2000-02-17 snapshot

1 files changed, 83 insertions, 0 deletions

diff --git a/newlib/libm/math/wf_atanh.c b/newlib/libm/math/wf_atanh.c
new file mode 100644
index 0000000..457cdc6e
--- /dev/null
+++ b/newlib/libm/math/wf_atanh.c
@@ -0,0 +1,83 @@
+/* wf_atanh.c -- float version of w_atanh.c.
+ * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@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 atanhf(x)
+ */
+
+#include "fdlibm.h"
+#include <errno.h>
+
+#ifdef __STDC__
+	float atanhf(float x)		/* wrapper atanhf */
+#else
+	float atanhf(x)			/* wrapper atanhf */
+	float x;
+#endif
+{
+#ifdef _IEEE_LIBM
+	return __ieee754_atanhf(x);
+#else
+	float z,y;
+	struct exception exc;
+	z = __ieee754_atanhf(x);
+	if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z;
+	y = fabsf(x);
+	if(y>=(float)1.0) {
+	    if(y>(float)1.0) {
+                /* atanhf(|x|>1) */
+                exc.type = DOMAIN;
+                exc.name = "atanhf";
+		exc.err = 0;
+		exc.arg1 = exc.arg2 = (double)x;
+                exc.retval = 0.0/0.0;
+                if (_LIB_VERSION == _POSIX_)
+                  errno = EDOM;
+                else if (!matherr(&exc)) {
+                  errno = EDOM;
+                }
+	    } else { 
+                /* atanhf(|x|=1) */
+                exc.type = SING;
+                exc.name = "atanhf";
+		exc.err = 0;
+		exc.arg1 = exc.arg2 = (double)x;
+		exc.retval = x/0.0;	/* sign(x)*inf */
+                if (_LIB_VERSION == _POSIX_)
+                  errno = EDOM;
+                else if (!matherr(&exc)) {
+                  errno = EDOM;
+                }
+            }
+	    if (exc.err != 0)
+              errno = exc.err;
+            return (float)exc.retval; 
+	} else
+	    return z;
+#endif
+}
+
+#ifdef _DOUBLE_IS_32BITS
+
+#ifdef __STDC__
+	double atanh(double x)
+#else
+	double atanh(x)
+	double x;
+#endif
+{
+	return (double) atanhf((float) x);
+}
+
+#endif /* defined(_DOUBLE_IS_32BITS) */