From: Akinobu Mita <mita@miraclelinux.com>
To: linux-kernel@vger.kernel.org
Cc: akpm@osdl.org, Richard Henderson <rth@twiddle.net>,
Ivan Kokshaysky <ink@jurassic.park.msu.ru>,
Russell King <rmk@arm.linux.org.uk>, Ian Molton <spyro@f2s.com>,
dev-etrax@axis.com, David Howells <dhowells@redhat.com>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Linus Torvalds <torvalds@osdl.org>,
linux-ia64@vger.kernel.org,
Hirokazu Takata <takata@linux-m32r.org>,
linux-m68k@vger.kernel.org, Greg Ungerer <gerg@uclinux.org>,
linux-mips@linux-mips.org, parisc-linux@parisc-linux.org,
linuxppc-dev@ozlabs.org, linux390@de.ibm.com,
linuxsh-dev@lists.sourceforge.net,
linuxsh-shmedia-dev@lists.sourceforge.net,
sparclinux@vger.kernel.org, ultralinux@vger.kernel.org,
Miles Bader <uclinux-v850@lsi.nec.co.jp>, Andi Kleen <ak@suse.de>,
Chris Zankel <chris@zankel.net>,
Akinobu Mita <mita@miraclelinux.com>
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
[-- Attachment #1: fls64.patch --]
[-- Type: text/plain, Size: 755 bytes --]
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 5:06 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-14 5:03 [patch 00/47] generic bitops Akinobu Mita
2006-02-14 5:03 ` [patch 01/47] alpha: use config options instead of __alpha_fix__ and __alpha_cix__ Akinobu Mita
2006-02-14 5:03 ` [patch 02/47] ia64: use cpu_set() instead of __set_bit() Akinobu Mita
2006-02-14 5:03 ` [patch 03/47] parisc: add ()-pair in __ffz() macro Akinobu Mita
2006-02-14 5:03 ` [patch 04/47] cris: remove unnecessary local_irq_restore() Akinobu Mita
2006-02-14 5:03 ` [patch 05/47] use non atomic operations for minix_*_bit() and ext2_*_bit() Akinobu Mita
2006-02-14 5:03 ` [patch 06/47] generic {,test_and_}{set,clear,change}_bit() Akinobu Mita
2006-02-14 5:03 ` [patch 07/47] generic __{,test_and_}{set,clear,change}_bit() and test_bit() Akinobu Mita
2006-02-14 5:03 ` [patch 08/47] generic __ffs() Akinobu Mita
2006-02-14 5:04 ` [patch 09/47] generic ffz() Akinobu Mita
2006-02-14 5:04 ` [patch 10/47] generic fls() Akinobu Mita
2006-02-14 5:04 ` Akinobu Mita [this message]
2006-02-14 5:04 ` [patch 12/47] generic find_{next,first}{,_zero}_bit() Akinobu Mita
2006-02-14 5:04 ` [patch 13/47] generic sched_find_first_bit() Akinobu Mita
2006-02-14 5:04 ` [patch 14/47] generic ffs() Akinobu Mita
2006-02-14 5:04 ` [patch 15/47] generic hweight{64,32,16,8}() Akinobu Mita
2006-02-14 5:04 ` [patch 16/47] generic ext2_{set,clear,test,find_first_zero,find_next_zero}_bit() Akinobu Mita
2006-02-14 5:04 ` [patch 17/47] generic ext2_{set,clear}_bit_atomic() Akinobu Mita
2006-02-14 5:04 ` [patch 18/47] generic minix_{test,set,test_and_clear,test,find_first_zero}_bit() Akinobu Mita
2006-02-14 5:04 ` [patch 19/47] alpha: use generic bitops Akinobu Mita
2006-02-14 5:04 ` [patch 20/47] arm: " Akinobu Mita
2006-02-14 5:04 ` [patch 21/47] arm26: " Akinobu Mita
2006-02-14 5:04 ` [patch 22/47] cris: " Akinobu Mita
2006-02-14 5:04 ` [patch 23/47] frv: " Akinobu Mita
2006-02-14 5:04 ` [patch 24/47] h8300: " Akinobu Mita
2006-02-14 5:04 ` [patch 25/47] i386: " Akinobu Mita
2006-02-14 5:04 ` [patch 26/47] ia64: " Akinobu Mita
2006-02-14 5:04 ` [patch 27/47] m32r: " Akinobu Mita
2006-02-14 5:04 ` [patch 28/47] m68k: " Akinobu Mita
2006-02-14 5:04 ` [patch 29/47] m68knommu: " Akinobu Mita
2006-02-14 5:04 ` [patch 30/47] mips: " Akinobu Mita
2006-02-14 5:04 ` [patch 31/47] parisc: " Akinobu Mita
2006-02-14 5:04 ` [patch 32/47] powerpc: " Akinobu Mita
2006-02-14 5:04 ` [patch 33/47] s390: " Akinobu Mita
2006-02-14 5:04 ` [patch 34/47] sh: " Akinobu Mita
2006-02-14 5:04 ` [patch 35/47] sh64: " Akinobu Mita
2006-02-14 5:04 ` [patch 36/47] sparc: " Akinobu Mita
2006-02-14 5:04 ` [patch 37/47] sparc64: " Akinobu Mita
2006-02-14 5:04 ` [patch 38/47] v850: " Akinobu Mita
2006-02-14 5:04 ` [patch 39/47] x86_64: " Akinobu Mita
2006-02-14 5:04 ` [patch 40/47] xtensa: " Akinobu Mita
2006-02-14 5:04 ` [patch 41/47] update include/asm-generic/bitops.h Akinobu Mita
2006-02-14 5:04 ` [patch 42/47] make thread_info.flags an unsigned long Akinobu Mita
2006-02-14 5:04 ` [patch 43/47] ia64: make partial_page.bitmap " Akinobu Mita
2006-02-14 5:04 ` [patch 44/47] ntfs: remove generic_ffs() Akinobu Mita
2006-02-14 5:04 ` [patch 45/47] remove unused generic bitops in include/linux/bitops.h Akinobu Mita
2006-02-14 5:04 ` [patch 46/47] hweight() related cleanup Akinobu Mita
2006-02-14 5:04 ` [patch 47/47] hweight() speedup Akinobu Mita
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