1 files changed, 69 insertions, 0 deletions
diff --git a/usr/src/lib/libm/common/m9x/modff.c b/usr/src/lib/libm/common/m9x/modff.c
new file mode 100644
index 0000000000..1add78a7c5
--- /dev/null
+++ b/usr/src/lib/libm/common/m9x/modff.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.
+ */
+
+#if defined(ELFOBJ)
+#pragma weak modff = __modff
+#pragma weak _modff = __modff
+#endif
+
+#include "libm.h"
+
+float
+__modff(float x, float *iptr) {
+	union {
+		unsigned i;
+		float f;
+	} xx, yy;
+	unsigned hx, s;
+
+	xx.f = x;
+	hx = xx.i & ~0x80000000;
+
+	if (hx >= 0x4b000000) {	/* x is NaN, infinite, or integral */
+		*iptr = x;
+		if (hx <= 0x7f800000)
+			xx.i &= 0x80000000;
+		return (xx.f);
+	}
+
+	if (hx < 0x3f800000) {	/* |x| < 1 */
+		xx.i &= 0x80000000;
+		*iptr = xx.f;
+		return (x);
+	}
+
+	/* split x at the binary point */
+	s = xx.i & 0x80000000;
+	yy.i = xx.i & ~((1 << (0x96 - (hx >> 23))) - 1);
+	*iptr = yy.f;
+	xx.f -= yy.f;
+	xx.i = (xx.i & ~0x80000000) | s;
+				/* restore sign in case difference is 0 */
+	return (xx.f);
+}