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From: zkabelac@sourceware.org
To: lvm-devel@redhat.com, lvm2-cvs@sourceware.org
Subject: LVM2/libdm/datastruct bitset.c
Date: Thu, 08 Jul 2010 12:16:00 -0000 [thread overview]
Message-ID: <20100708121617.29258.qmail@sourceware.org> (raw)
CVSROOT: /cvs/lvm2
Module name: LVM2
Changes by: zkabelac@sourceware.org 2010-07-08 12:16:16
Modified files:
libdm/datastruct: bitset.c
Log message:
Minor optimalization of _test_word.
Skip ffs() if (test >> bit) is 0.
Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/libdm/datastruct/bitset.c.diff?cvsroot=lvm2&r1=1.10&r2=1.11
--- LVM2/libdm/datastruct/bitset.c 2010/04/20 13:58:23 1.10
+++ LVM2/libdm/datastruct/bitset.c 2010/07/08 12:16:16 1.11
@@ -69,9 +69,9 @@
static int _test_word(uint32_t test, int bit)
{
- int next_set_bit;
+ uint32_t tb = test >> bit;
- return ((next_set_bit = ffs(test >> bit)) ? next_set_bit + bit - 1 : -1);
+ return (tb ? ffs(tb) + bit - 1 : -1);
}
int dm_bit_get_next(dm_bitset_t bs, int last_bit)
next reply other threads:[~2010-07-08 12:16 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-08 12:16 zkabelac [this message]
-- strict thread matches above, loose matches on Subject: below --
2010-04-19 21:08 agk
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