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[Qemu-devel] Re: [PATCH 0/5] tcg conditional set, round 4
From: |
Laurent Desnogues |
Subject: |
[Qemu-devel] Re: [PATCH 0/5] tcg conditional set, round 4 |
Date: |
Mon, 21 Dec 2009 11:03:23 +0100 |
On Mon, Dec 21, 2009 at 10:47 AM, Paolo Bonzini <address@hidden> wrote:
> On 12/21/2009 10:13 AM, Laurent Desnogues wrote:
>>
>> Which front-ends would need it and would the cost to generate
>> code for it on some (most?) back-ends be amortized?
>
> The ARM front-end could definitely use a backend's ability to do predication
> (via movcond).
I think most things done in the ARM front-end can be done
with a simpler movcond that'd be:
movcond cond, arg_cond1, arg_cond2, dest, vtrue
though as Richard said this could impact tcg reg alloc and
liveness analysis.
Also, I wonder what would be the impact on speed.
Laurent
- Re: [Qemu-devel] [PATCH 1/5] tcg: Generic support for conditional set, (continued)
- Re: [Qemu-devel] [PATCH 0/5] tcg conditional set, round 4, Aurelien Jarno, 2009/12/19
- Re: [Qemu-devel] [PATCH 0/5] tcg conditional set, round 4, Paul Brook, 2009/12/20
- Re: [Qemu-devel] [PATCH 0/5] tcg conditional set, round 4, Richard Henderson, 2009/12/20
- Re: [Qemu-devel] [PATCH 0/5] tcg conditional set, round 4, Richard Henderson, 2009/12/21
- Re: [Qemu-devel] [PATCH 0/5] tcg conditional set, round 4, Laurent Desnogues, 2009/12/21
- Re: [Qemu-devel] [PATCH 0/5] tcg conditional set, round 4, Richard Henderson, 2009/12/21
- Re: [Qemu-devel] [PATCH 0/5] tcg conditional set, round 4, Laurent Desnogues, 2009/12/21
- Re: [Qemu-devel] [PATCH 0/5] tcg conditional set, round 4, Richard Henderson, 2009/12/21
- Re: [Qemu-devel] [PATCH 0/5] tcg conditional set, round 4, Laurent Desnogues, 2009/12/22
- Re: [Qemu-devel] [PATCH 0/5] tcg conditional set, round 4, Laurent Desnogues, 2009/12/23
- Re: [Qemu-devel] [PATCH 0/5] tcg conditional set, round 4, Aurelien Jarno, 2009/12/22
- Re: [Qemu-devel] [PATCH 0/5] tcg conditional set, round 4, Aurelien Jarno, 2009/12/21