import newlib-2000-02-17 snapshot

1 files changed, 71 insertions, 0 deletions

diff --git a/newlib/libm/math/wf_atan2.c b/newlib/libm/math/wf_atan2.c
new file mode 100644
index 000000000..069a7ca13
--- /dev/null
+++ b/newlib/libm/math/wf_atan2.c
@@ -0,0 +1,71 @@
+/* wf_atan2.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.
+ * ====================================================
+ *
+ */
+
+/* 
+ * wrapper atan2f(y,x)
+ */
+
+#include "fdlibm.h"
+#include <errno.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;
+	struct exception exc;
+	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) */
+	    exc.arg1 = y;
+	    exc.arg2 = x;
+	    exc.err = 0;
+	    exc.type = DOMAIN;
+	    exc.name = "atan2f";
+	    exc.retval = 0.0;
+	    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 atan2(double y, double x)
+#else
+	double atan2(y,x)
+	double y,x;
+#endif
+{
+	return (double) atan2f((float) y, (float) x);
+}
+
+#endif /* defined(_DOUBLE_IS_32BITS) */