693 Opensource replacement of sunwlibm

Reviewed by: Igor Kozhukhov ikozhukhov@gmail.com
Reviewed by: Keith M Wesolowski <keith.wesolowski@joyent.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Approved by: Dan McDonald <danmcd@omniti.com>

1 files changed, 69 insertions, 0 deletions

diff --git a/usr/src/lib/libm/common/complex/cproj.c b/usr/src/lib/libm/common/complex/cproj.c
new file mode 100644
index 0000000000..10ed9ad20a
--- /dev/null
+++ b/usr/src/lib/libm/common/complex/cproj.c
@@ -0,0 +1,69 @@
+/*
+ * 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 cproj = __cproj
+
+/* INDENT OFF */
+/*
+ * dcomplex cproj(dcomplex z);
+ *
+ * If one of the component of z = (x,y) is an inf, then
+ *	cproj(z) = (+inf, copysign(0,y));
+ * otherwise,
+ *	cproj(z) = z
+ */
+/* INDENT ON */
+
+#include "libm.h"			/* fabs */
+#include "complex_wrapper.h"
+
+static const double zero = 0.0;
+
+dcomplex
+cproj(dcomplex z) {
+	double x, y;
+	int ix, iy, hx, hy, lx, ly;
+
+	x = D_RE(z);
+	y = D_IM(z);
+	hx = HI_WORD(x);
+	lx = LO_WORD(x);
+	hy = HI_WORD(y);
+	ly = LO_WORD(y);
+	ix = hx & 0x7fffffff;
+	iy = hy & 0x7fffffff;
+	if (ISINF(iy, ly)) {
+		D_RE(z) = fabs(y);
+		D_IM(z) = hy >= 0 ? zero : -zero;
+	} else if (ISINF(ix, lx)) {
+		D_RE(z) = fabs(x);
+		D_IM(z) = hy >= 0 ? zero : -zero;
+	}
+	return (z);
+}