From: Akinobu Mita <mita@miraclelinux.com>
To: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org, linux-ia64@vger.kernel.org,
Ian Molton <spyro@f2s.com>, David Howells <dhowells@redhat.com>,
linuxppc-dev@ozlabs.org, Greg Ungerer <gerg@uclinux.org>,
sparclinux@vger.kernel.org,
Miles Bader <uclinux-v850@lsi.nec.co.jp>,
Linus Torvalds <torvalds@osdl.org>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Hirokazu Takata <takata@linux-m32r.org>,
linuxsh-shmedia-dev@lists.sourceforge.net,
linux-m68k@lists.linux-m68k.org,
Ivan Kokshaysky <ink@jurassic.park.msu.ru>,
Richard Henderson <rth@twiddle.net>,
Akinobu Mita <mita@miraclelinux.com>,
Chris Zankel <chris@zankel.net>,
dev-etrax@axis.com, ultralinux@vger.kernel.org,
Andi Kleen <ak@suse.de>,
linuxsh-dev@lists.sourceforge.net, linux390@de.ibm.com,
Russell King <rmk@arm.linux.org.uk>,
parisc-linux@parisc-linux.org
Subject: [patch 10/44] generic fls64()
Date: Wed, 01 Feb 2006 18:02:34 +0900 [thread overview]
Message-ID: <20060201090323.294297000@localhost.localdomain> (raw)
In-Reply-To: 20060201090224.536581000@localhost.localdomain
This patch introduces the C-language equivalent of the function:
int fls64(__u64 x);
In include/asm-generic/bitops/fls64.h
This code largely copied from:
include/linux/bitops.h
Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
include/asm-generic/bitops/fls64.h | 12 ++++++++++++
1 files changed, 12 insertions(+)
Index: 2.6-git/include/asm-generic/bitops/fls64.h
===================================================================
--- /dev/null
+++ 2.6-git/include/asm-generic/bitops/fls64.h
@@ -0,0 +1,12 @@
+#ifndef _ASM_GENERIC_BITOPS_FLS64_H_
+#define _ASM_GENERIC_BITOPS_FLS64_H_
+
+static inline int fls64(__u64 x)
+{
+ __u32 h = x >> 32;
+ if (h)
+ return fls(x) + 32;
+ return fls(x);
+}
+
+#endif /* _ASM_GENERIC_BITOPS_FLS64_H_ */
--
next prev parent reply other threads:[~2006-02-01 9:03 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20060201090224.536581000@localhost.localdomain>
2006-02-01 9:02 ` [patch 06/44] generic __{, test_and_}{set, clear, change}_bit() and test_bit() Akinobu Mita
2006-02-01 9:02 ` Akinobu Mita [this message]
2006-02-01 9:02 ` [patch 12/44] generic sched_find_first_bit() Akinobu Mita
2006-02-03 3:58 ` [parisc-linux] " Grant Grundler
2006-02-01 9:02 ` [patch 14/44] generic hweight{64,32,16,8}() Akinobu Mita
2006-02-01 9:06 ` Andi Kleen
2006-02-01 9:26 ` Michael Tokarev
2006-02-01 10:24 ` Andi Kleen
2006-02-02 12:50 ` Akinobu Mita
2006-02-02 1:26 ` Gabriel Paubert
2006-02-06 11:52 ` Akinobu Mita
2006-02-03 8:31 ` Ulrich Eckhardt
2006-02-01 9:02 ` [patch 31/44] powerpc: use generic bitops Akinobu Mita
2006-02-02 15:05 [patch 10/44] generic fls64() Rune Torgersen
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