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Re: [Qemu-devel] [PATCH v2] Use ffs in favor of ffsll
From: |
Nathan Froyd |
Subject: |
Re: [Qemu-devel] [PATCH v2] Use ffs in favor of ffsll |
Date: |
Wed, 1 Jul 2009 13:58:02 -0700 |
User-agent: |
Mutt/1.5.13 (2006-08-11) |
On Wed, Jul 01, 2009 at 10:55:02PM +0200, Jan Kiszka wrote:
> Jan Kiszka wrote:
> > Blue Swirl wrote:
> >> I think this will not work on a big endian host.
> >
> > Right, may theoretically bite us once we are able to migrate between kvm
> > and tcg. Will send a better version nevertheless.
> >
>
> - for (i = 0; i < ARRAY_SIZE(env->interrupt_bitmap); i++) {
> - bit = ffsll(env->interrupt_bitmap[i]);
> + for (i = 0; i < sizeof(env->interrupt_bitmap) / sizeof(int); i++) {
> + /* Note: This assumes little endian host, which is true in KVM mode.
> + In TCG mode it must be zero anyway. */
> + bit = ffs(((int *)env->interrupt_bitmap)[i]);
ISTR that some PPC hosts support KVM...
-Nathan
- [Qemu-devel] [PATCH] Use ffs in favor of ffsll, Jan Kiszka, 2009/07/01
- [Qemu-devel] Re: [PATCH] Use ffs in favor of ffsll, Blue Swirl, 2009/07/01
- [Qemu-devel] Re: [PATCH] Use ffs in favor of ffsll, Jan Kiszka, 2009/07/01
- [Qemu-devel] [PATCH v2] Use ffs in favor of ffsll, Jan Kiszka, 2009/07/01
- Re: [Qemu-devel] [PATCH v2] Use ffs in favor of ffsll,
Nathan Froyd <=
- [Qemu-devel] Re: [PATCH v2] Use ffs in favor of ffsll, Jan Kiszka, 2009/07/01
- Re: [Qemu-devel] [PATCH v2] Use ffs in favor of ffsll, Stuart Brady, 2009/07/01
- [Qemu-devel] [PATCH] Use ctz64 in favor of ffsll, Jan Kiszka, 2009/07/02
- [Qemu-devel] [PATCH v2] Use ctz64 in favor of ffsll, Jan Kiszka, 2009/07/02
- Re: [Qemu-devel] [PATCH v2] Use ctz64 in favor of ffsll, Paul Brook, 2009/07/03
- Re: [Qemu-devel] [PATCH v2] Use ctz64 in favor of ffsll, Jan Kiszka, 2009/07/04
Re: [Qemu-devel] Re: [PATCH] Use ffs in favor of ffsll, Christoph Egger, 2009/07/02