1 files changed, 127 insertions, 0 deletions
diff --git a/usr/src/lib/libm/common/m9x/frexpl.c b/usr/src/lib/libm/common/m9x/frexpl.c
new file mode 100644
index 0000000000..69a2088974
--- /dev/null
+++ b/usr/src/lib/libm/common/m9x/frexpl.c
@@ -0,0 +1,127 @@
+/*
+ * 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 frexpl = __frexpl
+#endif
+
+#include "libm.h"
+
+#if defined(__sparc)
+
+long double
+__frexpl(long double x, int *exp) {
+	union {
+		unsigned i[4];
+		long double q;
+	} xx;
+	unsigned hx;
+	int e, s;
+
+	xx.q = x;
+	hx = xx.i[0] & ~0x80000000;
+
+	if (hx >= 0x7fff0000) {	/* x is infinite or NaN */
+		*exp = 0;
+		return (x);
+	}
+
+	e = 0;
+	if (hx < 0x00010000) {	/* x is subnormal or zero */
+		if ((hx | xx.i[1] | xx.i[2] | xx.i[3]) == 0) {
+			*exp = 0;
+			return (x);
+		}
+
+		/* normalize x */
+		s = xx.i[0] & 0x80000000;
+		while ((hx | (xx.i[1] & 0xffff0000)) == 0) {
+			hx = xx.i[1];
+			xx.i[1] = xx.i[2];
+			xx.i[2] = xx.i[3];
+			xx.i[3] = 0;
+			e -= 32;
+		}
+		while (hx < 0x10000) {
+			hx = (hx << 1) | (xx.i[1] >> 31);
+			xx.i[1] = (xx.i[1] << 1) | (xx.i[2] >> 31);
+			xx.i[2] = (xx.i[2] << 1) | (xx.i[3] >> 31);
+			xx.i[3] <<= 1;
+			e--;
+		}
+		xx.i[0] = s | hx;
+	}
+
+	/* now xx.q is normal */
+	xx.i[0] = (xx.i[0] & ~0x7fff0000) | 0x3ffe0000;
+	*exp = e + (hx >> 16) - 0x3ffe;
+	return (xx.q);
+}
+
+#elif defined(__x86)
+
+long double
+__frexpl(long double x, int *exp) {
+	union {
+		unsigned i[3];
+		long double e;
+	} xx;
+	unsigned hx;
+	int e;
+
+	xx.e = x;
+	hx = xx.i[2] & 0x7fff;
+
+	if (hx >= 0x7fff) {	/* x is infinite or NaN */
+		*exp = 0;
+		return (x);
+	}
+
+	e = 0;
+	if (hx < 0x0001) {	/* x is subnormal or zero */
+		if ((xx.i[0] | xx.i[1]) == 0) {
+			*exp = 0;
+			return (x);
+		}
+
+		/* normalize x */
+		xx.e *= 18446744073709551616.0L;	/* 2^64 */
+		hx = xx.i[2] & 0x7fff;
+		e = -64;
+	}
+
+	/* now xx.e is normal */
+	xx.i[2] = (xx.i[2] & 0x8000) | 0x3ffe;
+	*exp = e + hx - 0x3ffe;
+	return (xx.e);
+}
+
+#else
+#error Unknown architecture
+#endif