Module Name: src
Committed By: riastradh
Date: Sun Feb 16 07:29:48 UTC 2020
Added Files:
src/sys/external/bsd/common/include/linux: log2.h
Removed Files:
src/sys/external/bsd/drm2/include/linux: log2.h
Log Message:
Move another file from drm2 to common for <linux/kernel.h>.
To generate a diff of this commit:
cvs rdiff -u -r0 -r1.1 src/sys/external/bsd/common/include/linux/log2.h
cvs rdiff -u -r1.5 -r0 src/sys/external/bsd/drm2/include/linux/log2.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Added files:
Index: src/sys/external/bsd/common/include/linux/log2.h
diff -u /dev/null src/sys/external/bsd/common/include/linux/log2.h:1.1
--- /dev/null Sun Feb 16 07:29:48 2020
+++ src/sys/external/bsd/common/include/linux/log2.h Sun Feb 16 07:29:48 2020
@@ -0,0 +1,76 @@
+/* $NetBSD: log2.h,v 1.1 2020/02/16 07:29:48 riastradh Exp $ */
+
+/*-
+ * Copyright (c) 2013 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Taylor R. Campbell.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+#ifndef _LINUX_LOG2_H_
+#define _LINUX_LOG2_H_
+
+#include <sys/types.h>
+#include <sys/bitops.h>
+
+#include <machine/limits.h>
+
+static inline bool
+is_power_of_2(unsigned long x)
+{
+ return ((x != 0) && (((x - 1) & x) == 0));
+}
+
+static inline unsigned long
+roundup_pow_of_two(unsigned long n)
+{
+ unsigned i;
+
+ if (n == 0)
+ return 1;
+
+ n -= 1;
+ for (i = 1; i < CHAR_BIT * sizeof n; i <<= 1)
+ n |= (n >> i);
+
+ return (n + 1);
+}
+
+static inline unsigned long
+rounddown_pow_of_two(unsigned long n)
+{
+
+ /* XXX fls64 is not fls_ulong, but it'll do for now. */
+ return (1UL << (fls64(n) - 1));
+}
+
+static inline unsigned
+order_base_2(unsigned long n)
+{
+
+ return ilog2(roundup_pow_of_two(n));
+}
+
+#endif /* _LINUX_LOG2_H_ */
