1 files changed, 81 insertions, 0 deletions
diff --git a/usr/src/lib/libm/common/m9x/lrint.c b/usr/src/lib/libm/common/m9x/lrint.c
new file mode 100644
index 0000000000..c3e4ed495d
--- /dev/null
+++ b/usr/src/lib/libm/common/m9x/lrint.c
@@ -0,0 +1,81 @@
+/*
+ * 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 lrint = __lrint
+#endif
+
+/*
+ * lrint(x) rounds its argument to the nearest integer according
+ * to the current rounding direction and converts the result to
+ * a 32 bit signed integer.
+ *
+ * If x is NaN, infinite, or so large that the nearest integer
+ * would exceed 32 bits, the invalid operation exception is raised.
+ * If x is not an integer, the inexact exception is raised.
+ */
+
+#include <sys/isa_defs.h>	/* _ILP32 */
+#include "libm.h"
+
+#if defined(_ILP32)
+long
+lrint(double x) {
+	/*
+	 * Note: The following code works on x86 (in the default rounding
+	 * precision mode), but one should just use the fistpl instruction
+	 * instead.
+	 */
+	union {
+		unsigned i[2];
+		double d;
+	} xx, yy;
+	unsigned hx;
+
+	xx.d = x;
+	hx = xx.i[HIWORD] & ~0x80000000;
+	if (hx < 0x43300000) { /* |x| < 2^52 */
+		/* add and subtract a power of two to round x to an integer */
+#if defined(__sparc)
+		yy.i[HIWORD] = (xx.i[HIWORD] & 0x80000000) | 0x43300000;
+#elif defined(__x86)
+		yy.i[HIWORD] = (xx.i[HIWORD] & 0x80000000) | 0x43e00000;
+#else
+#error Unknown architecture
+#endif
+		yy.i[LOWORD] = 0;
+		x = (x + yy.d) - yy.d;
+	}
+
+	/* now x is nan, inf, or integral */
+	return ((long) x);
+}
+#else
+#error Unsupported architecture
+#endif	/* defined(_ILP32) */