From: Akinobu Mita <mita@miraclelinux.com>
To: linux-kernel@vger.kernel.org
Cc: akpm@osdl.org, linux-mips@linux-mips.org,
linux-ia64@vger.kernel.org, Ian Molton <spyro@f2s.com>,
Andi Kleen <ak@suse.de>, 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>,
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,
Linus Torvalds <torvalds@osdl.org>,
linuxsh-dev@lists.sourceforge.net, linux390@de.ibm.com,
Russell King <rmk@arm.linux.org.uk>,
parisc-linux@parisc-linux.org
Subject: [patch 11/47] generic fls64()
Date: Tue, 14 Feb 2006 14:04:02 +0900 [thread overview]
Message-ID: <20060214050443.852246000@localhost.localdomain> (raw)
In-Reply-To: 20060214050351.252615000@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-rc/include/asm-generic/bitops/fls64.h
===================================================================
--- /dev/null
+++ 2.6-rc/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(h) + 32;
+ return fls(x);
+}
+
+#endif /* _ASM_GENERIC_BITOPS_FLS64_H_ */
--
next prev parent reply other threads:[~2006-02-14 5:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20060214050351.252615000@localhost.localdomain>
2006-02-14 5:03 ` [patch 07/47] generic __{, test_and_}{set, clear, change}_bit() and test_bit() Akinobu Mita
2006-02-14 5:04 ` Akinobu Mita [this message]
2006-02-14 5:04 ` [patch 13/47] generic sched_find_first_bit() Akinobu Mita
2006-02-14 5:04 ` [patch 15/47] generic hweight{64,32,16,8}() Akinobu Mita
2006-02-14 5:04 ` [patch 32/47] powerpc: use generic bitops Akinobu Mita
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