From: Marcelo Tosatti <mtosatti@redhat.com>
To: Avi Kivity <avi@qumranet.com>
Cc: kvm-devel <kvm-devel@lists.sourceforge.net>,
Marcelo Tosatti <mtosatti@redhat.com>
Subject: [patch 1/3] QEMU/KVM: add fls()
Date: Mon, 17 Mar 2008 17:20:14 -0300 [thread overview]
Message-ID: <20080317202125.325812182@localhost.localdomain> (raw)
In-Reply-To: 20080317202013.949027343@localhost.localdomain
[-- Attachment #1: add-fls --]
[-- Type: text/plain, Size: 1170 bytes --]
Find Last Set, in accordance with glibc's ffs.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Index: kvm-userspace.hotplug3/qemu/cutils.c
===================================================================
--- kvm-userspace.hotplug3.orig/qemu/cutils.c
+++ kvm-userspace.hotplug3/qemu/cutils.c
@@ -135,3 +135,14 @@ char *urldecode(const char *ptr)
return ret;
}
+int fls(int i)
+{
+ int bit;
+
+ for (bit=31; bit >= 0; bit--)
+ if (i & (1 << bit))
+ return bit+1;
+
+ return 0;
+}
+
Index: kvm-userspace.hotplug3/qemu/qemu-common.h
===================================================================
--- kvm-userspace.hotplug3.orig/qemu/qemu-common.h
+++ kvm-userspace.hotplug3/qemu/qemu-common.h
@@ -87,6 +87,7 @@ int stristart(const char *str, const cha
time_t mktimegm(struct tm *tm);
int hex2bin(char ch);
char *urldecode(const char *ptr);
+int fls(int i);
/* Error handling. */
--
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next prev parent reply other threads:[~2008-03-17 20:20 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-17 20:20 [patch 0/3] QEMU: virtio should register power of two sized regions Marcelo Tosatti
2008-03-17 20:20 ` Marcelo Tosatti [this message]
2008-03-17 20:20 ` [patch 2/3] QEMU/KVM: virtio register pow2 memory regions Marcelo Tosatti
2008-03-17 20:20 ` [patch 3/3] QEMU/KVM: bail out if PCI region is not power of two Marcelo Tosatti
2008-03-18 6:38 ` [patch 0/3] QEMU: virtio should register power of two sized regions Avi Kivity
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