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, 100 insertions, 0 deletions

diff --git a/usr/src/lib/libm/common/complex/ccoshf.c b/usr/src/lib/libm/common/complex/ccoshf.c
new file mode 100644
index 0000000000..873cf0aa03
--- /dev/null
+++ b/usr/src/lib/libm/common/complex/ccoshf.c
@@ -0,0 +1,100 @@
+/*
+ * 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 2005 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma weak ccoshf = __ccoshf
+
+#include "libm.h"
+#include "complex_wrapper.h"
+
+#if defined(__i386) && !defined(__amd64)
+extern int __swapRP(int);
+#endif
+
+static const float zero = 0.0F, half = 0.5F;
+
+fcomplex
+ccoshf(fcomplex z) {
+	float		t, x, y, S, C;
+	double		w;
+	int		hx, ix, hy, iy, n;
+	fcomplex	ans;
+
+	x = F_RE(z);
+	y = F_IM(z);
+	hx = THE_WORD(x);
+	ix = hx & 0x7fffffff;
+	hy = THE_WORD(y);
+	iy = hy & 0x7fffffff;
+	x = fabsf(x);
+	y = fabsf(y);
+
+	sincosf(y, &S, &C);
+	if (ix >= 0x41600000) {	/* |x| > 14 = prec/2 (14,28,34,60) */
+		if (ix >= 0x42B171AA) {	/* |x| > 88.722... ~ log(2**128) */
+			if (ix >= 0x7f800000) {	/* |x| is inf or NaN */
+				if (iy == 0) {
+					F_RE(ans) = x;
+					F_IM(ans) = y;
+				} else if (iy >= 0x7f800000) {
+					F_RE(ans) = x;
+					F_IM(ans) = x - y;
+				} else {
+					F_RE(ans) = C * x;
+					F_IM(ans) = S * x;
+				}
+			} else {
+#if defined(__i386) && !defined(__amd64)
+				int	rp = __swapRP(fp_extended);
+#endif
+				/* return (C, S) * exp(x) / 2 */
+				w = __k_cexp((double)x, &n);
+				F_RE(ans) = (float)scalbn(C * w, n - 1);
+				F_IM(ans) = (float)scalbn(S * w, n - 1);
+#if defined(__i386) && !defined(__amd64)
+				if (rp != fp_extended)
+					(void) __swapRP(rp);
+#endif
+			}
+		} else {
+			t = expf(x) * half;
+			F_RE(ans) = C * t;
+			F_IM(ans) = S * t;
+		}
+	} else {
+		if (ix == 0) {	/* x = 0, return (C,0) */
+			F_RE(ans) = C;
+			F_IM(ans) = zero;
+		} else {
+			F_RE(ans) = C * coshf(x);
+			F_IM(ans) = S * sinhf(x);
+		}
+	}
+	if ((hx ^ hy) < 0)
+		F_IM(ans) = -F_IM(ans);
+	return (ans);
+}