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-rw-r--r--sysdeps/libm-ieee754/w_atan2f.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/sysdeps/libm-ieee754/w_atan2f.c b/sysdeps/libm-ieee754/w_atan2f.c
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+++ b/sysdeps/libm-ieee754/w_atan2f.c
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+/* w_atan2f.c -- float version of w_atan2.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.
+ * ====================================================
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: w_atan2f.c,v 1.3 1995/05/10 20:48:42 jtc Exp $";
+#endif
+
+/* 
+ * wrapper atan2f(y,x)
+ */
+
+#include "math.h"
+#include "math_private.h"
+
+
+#ifdef __STDC__
+	float __atan2f(float y, float x)		/* wrapper atan2f */
+#else
+	float __atan2f(y,x)			/* wrapper atan2 */
+	float y,x;
+#endif
+{
+#ifdef _IEEE_LIBM
+	return __ieee754_atan2f(y,x);
+#else
+	float z;
+	z = __ieee754_atan2f(y,x);
+	if(_LIB_VERSION == _IEEE_||__isnanf(x)||__isnanf(y)) return z;
+	if(x==(float)0.0&&y==(float)0.0) {
+		/* atan2f(+-0,+-0) */
+	        return (float)__kernel_standard((double)y,(double)x,103);
+	} else
+	    return z;
+#endif
+}
+weak_alias (__atan2f, atan2f)