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Re: [Qemu-devel] [PATCH v2] Use ctz64 in favor of ffsll
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From: |
Jan Kiszka |
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Subject: |
Re: [Qemu-devel] [PATCH v2] Use ctz64 in favor of ffsll |
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Date: |
Sat, 04 Jul 2009 09:16:40 +0200 |
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User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
Paul Brook wrote:
> On Thursday 02 July 2009, Jan Kiszka wrote:
>> Not all host platforms support ffsll.
>
>> - pending_irq = i * 64 + bit - 1;
>> + bit = ctz64(env->interrupt_bitmap[i]);
>> + pending_irq = i * 64 + bit;
>
> Are we sure there is only ever one bit set in interrupt_bitmap?
Yes.
> If not does it mater that we're processing them in reverse order?
>
> Paul
Jan
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- [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, 2009/07/01
- [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 <=
Re: [Qemu-devel] Re: [PATCH] Use ffs in favor of ffsll, Christoph Egger, 2009/07/02