svn commit: r202030 - head/sys/mips/include

[Warner Losh]

Author: imp
Date: Sun Jan 10 19:44:08 2010
New Revision: 202030
URL: http://svn.freebsd.org/changeset/base/202030

Log:
  Merge from projects/mips to head by hand:
  
  Merge in rmi's fls64 code...

Added:
     - copied unchanged from r202029, projects/mips/sys/mips/include/fls64.h
Directory Properties:
  head/sys/mips/include/fls64.h   (props changed)

Copied: head/sys/mips/include/fls64.h (from r202029, projects/mips/sys/mips/include/fls64.h)
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ head/sys/mips/include/fls64.h	Sun Jan 10 19:44:08 2010	(r202030, copy of r202029, projects/mips/sys/mips/include/fls64.h)
@@ -0,0 +1,47 @@
+/*-
+ * Copyright (c) 2003-2009 RMI Corporation
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of RMI Corporation, nor the names of its contributors,
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * RMI_BSD */
+#ifndef _MIPS_FLS64_H_
+#define _MIPS_FLS64_H_
+
+/*
+ * Find Last Set bit (64 bit)
+ */
+static inline int
+fls64(__uint64_t mask)
+{
+	int bit;
+
+	if (mask == 0)
+		return (0);
+	for (bit = 1; ((mask & 0x1ULL) == 0); bit++)
+		mask = mask >> 1;
+	return (bit);
+}
+#endif