1 files changed, 105 insertions, 0 deletions
diff --git a/usr/src/lib/libm/common/complex/clogl.c b/usr/src/lib/libm/common/complex/clogl.c
new file mode 100644
index 0000000000..87d584f8a5
--- /dev/null
+++ b/usr/src/lib/libm/common/complex/clogl.c
@@ -0,0 +1,105 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
+ */
+/*
+ * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma weak clogl = __clogl
+
+#include "libm.h"	/* atan2l/fabsl/isinfl/log1pl/logl/__k_clog_rl */
+#include "complex_wrapper.h"
+#include "longdouble.h"
+
+#if defined(__sparc)
+#define	SIGP7	120
+#define	HSIGP7	60
+#elif defined(__x86)
+#define	SIGP7	70
+#define	HSIGP7	35
+#endif
+
+/* INDENT OFF */
+static const long double zero = 0.0L, half = 0.5L, one = 1.0L;
+/* INDENT ON */
+
+ldcomplex
+clogl(ldcomplex z) {
+	ldcomplex ans;
+	long double x, y, t, ax, ay;
+	int n, ix, iy, hx, hy;
+
+	x = LD_RE(z);
+	y = LD_IM(z);
+	hx = HI_XWORD(x);
+	hy = HI_XWORD(y);
+	ix = hx & 0x7fffffff;
+	iy = hy & 0x7fffffff;
+	ay = fabsl(y);
+	ax = fabsl(x);
+	LD_IM(ans) = atan2l(y, x);
+	if (ix < iy || (ix == iy && ix < 0x7fff0000 && ax < ay)) {
+			/* swap x and y to force ax>=ay */
+		t = ax;
+		ax = ay;
+		ay = t;
+		n = ix, ix = iy;
+		iy = n;
+	}
+	n = (ix - iy) >> 16;
+	if (ix >= 0x7fff0000) {	/* x or y is Inf or NaN */
+		if (isinfl(ax))
+			LD_RE(ans) = ax;
+		else if (isinfl(ay))
+			LD_RE(ans) = ay;
+		else
+			LD_RE(ans) = ax + ay;
+	} else if (ay == zero)
+		LD_RE(ans) = logl(ax);
+	else if (((0x3fffffff - ix) ^ (ix - 0x3ffe0000)) >= 0) {
+							/* 0.5 <= x < 2 */
+		if (ix >= 0x3fff0000) {
+			if (ax == one)
+				LD_RE(ans) = half * log1pl(ay * ay);
+			else if (n >= SIGP7)
+				LD_RE(ans) = logl(ax);
+			else
+				LD_RE(ans) = half * (log1pl(ay * ay + (ax -
+					one) * (ax + one)));
+		} else if (n >= SIGP7)
+			LD_RE(ans) = logl(ax);
+		else
+			LD_RE(ans) = __k_clog_rl(x, y, &t);
+	} else if (n >= HSIGP7)
+		LD_RE(ans) = logl(ax);
+	else if (ix < 0x5f3f0000 && iy >= 0x20bf0000)
+		/* 2**-8000 < y < x < 2**8000 */
+		LD_RE(ans) = half * logl(ax * ax + ay * ay);
+	else {
+		t = ay / ax;
+		LD_RE(ans) = logl(ax) + half * log1pl(t * t);
+	}
+	return (ans);
+}