1 files changed, 83 insertions, 0 deletions
diff --git a/usr/src/lib/libm/common/R/__sinf.c b/usr/src/lib/libm/common/R/__sinf.c
new file mode 100644
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+++ b/usr/src/lib/libm/common/R/__sinf.c
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+/*
+ * 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.
+ */
+
+#include "libm.h"
+
+/* INDENT OFF */
+/*
+ * float __k_sin(double x);
+ * kernel (float) sin function on [-pi/4, pi/4], pi/4 ~ 0.785398164
+ * Input x is in double and assumed to be bounded by ~pi/4 in magnitude.
+ *
+ * Method: Let z = x * x, then
+ *      S(x) = x(S0 + S1*z)(S2 + S3*z + z*z)
+ * where
+ *	S0 =   1.85735322054308378716204874632872525989806770558e-0003,
+ *	S1 =  -1.95035094218403635082921458859320791358115801259e-0004,
+ *	S2 =   5.38400550766074785970952495168558701485841707252e+0002,
+ *	S3 =  -3.31975110777873728964197739157371509422022905947e+0001,
+ *
+ * The remez error is bound by  |(sin(x) - S(x))/x| < 2**(-28.2)
+ *
+ * Constants:
+ * The hexadecimal values are the intended ones for the following constants.
+ * The decimal values may be used, provided that the compiler will convert
+ * from decimal to binary accurately enough to produce the hexadecimal values
+ * shown.
+ */
+/* INDENT ON */
+
+static const double q[] = {
+/* S0 = */  1.85735322054308378716204874632872525989806770558e-0003,
+/* S1 = */ -1.95035094218403635082921458859320791358115801259e-0004,
+/* S2 = */  5.38400550766074785970952495168558701485841707252e+0002,
+/* S3 = */ -3.31975110777873728964197739157371509422022905947e+0001,
+};
+
+#define	S0  q[0]
+#define	S1  q[1]
+#define	S2  q[2]
+#define	S3  q[3]
+
+float
+__k_sinf(double x) {
+	float ft;
+	double z;
+	int hx;
+
+	hx = ((int *) &x)[HIWORD];	/* hx = leading x */
+	if ((hx & ~0x80000000) < 0x3f100000) {	/* if |x| < 2**-14 */
+		ft = (float) x;
+		if ((int) x == 0)	/* raise inexact if x != 0 */
+			return (ft);
+	}
+	z = x * x;
+	ft = (float) ((x * (S0 + z * S1)) * (S2 + z * (S3 + z)));
+	return (ft);
+}