1 files changed, 78 insertions, 0 deletions
diff --git a/usr/src/lib/libm/common/m9x/fmaxl.c b/usr/src/lib/libm/common/m9x/fmaxl.c
new file mode 100644
index 0000000000..f6de1d5ebe
--- /dev/null
+++ b/usr/src/lib/libm/common/m9x/fmaxl.c
@@ -0,0 +1,78 @@
+/*
+ * 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.
+ */
+
+#if defined(ELFOBJ)
+#pragma weak fmaxl = __fmaxl
+#endif
+
+#include "libm.h"	/* for isgreaterequal macro */
+
+long double
+__fmaxl(long double x, long double y) {
+	union {
+#if defined(__sparc)
+		unsigned i[4];
+#elif defined(__x86)
+		unsigned i[3];
+#else
+#error Unknown architecture
+#endif
+		long double ld;
+	} xx, yy;
+	unsigned s;
+
+	/* if y is nan, replace it by x */
+	if (y != y)
+		y = x;
+
+	/* if x is nan, replace it by y */
+	if (x != x)
+		x = y;
+
+	/* At this point, x and y are either both numeric, or both NaN */
+	if (!isnan(x) && !isgreaterequal(x, y))
+		x = y;
+
+	/*
+	 * clear the sign of the result if either x or y has its sign clear
+	 */
+	xx.ld = x;
+	yy.ld = y;
+#if defined(__sparc)
+	s = ~(xx.i[0] & yy.i[0]) & 0x80000000;
+	xx.i[0] &= ~s;
+#elif defined(__x86)
+	s = ~(xx.i[2] & yy.i[2]) & 0x8000;
+	xx.i[2] &= ~s;
+#else
+#error Unknown architecture
+#endif
+
+	return (xx.ld);
+}