From: Laurent Desnogues <laurent.desnogues@gmail.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: qemu-devel@nongnu.org, Paul Brook <paul@codesourcery.com>,
aurelien@aurel32.net, Richard Henderson <rth@twiddle.net>
Subject: [Qemu-devel] Re: [PATCH 0/5] tcg conditional set, round 4
Date: Mon, 21 Dec 2009 11:03:23 +0100 [thread overview]
Message-ID: <761ea48b0912210203u6eb6e46ax4ec63ad8a383c490@mail.gmail.com> (raw)
In-Reply-To: <4B2F444D.8030204@redhat.com>
On Mon, Dec 21, 2009 at 10:47 AM, Paolo Bonzini <pbonzini@redhat.com> 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
next prev parent reply other threads:[~2009-12-21 10:03 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-19 18:52 [Qemu-devel] [PATCH 0/5] tcg conditional set, round 4 Richard Henderson
2009-12-19 16:50 ` [Qemu-devel] [PATCH 2/5] tcg-x86_64: Implement setcond Richard Henderson
2009-12-19 23:11 ` Aurelien Jarno
2009-12-19 18:01 ` [Qemu-devel] [PATCH 1/5] tcg: Generic support for conditional set Richard Henderson
2009-12-19 23:11 ` Aurelien Jarno
2009-12-19 23:24 ` Richard Henderson
2009-12-19 23:45 ` Aurelien Jarno
2009-12-22 11:27 ` Laurent Desnogues
2009-12-22 16:09 ` Richard Henderson
2009-12-19 18:44 ` [Qemu-devel] [PATCH 3/5] tcg-i386: Implement small forward branches Richard Henderson
2009-12-19 23:11 ` Aurelien Jarno
2009-12-19 23:32 ` Laurent Desnogues
2009-12-20 1:17 ` Richard Henderson
2009-12-19 18:44 ` [Qemu-devel] [PATCH 4/5] tcg: Add tcg_invert_cond Richard Henderson
2009-12-19 23:11 ` Aurelien Jarno
2009-12-19 18:46 ` [Qemu-devel] [PATCH 5/5] tcg-i386: Implement setcond Richard Henderson
2009-12-19 23:11 ` Aurelien Jarno
2009-12-22 12:20 ` Laurent Desnogues
2009-12-19 23:11 ` [Qemu-devel] [PATCH 0/5] tcg conditional set, round 4 Aurelien Jarno
2009-12-19 23:43 ` malc
2009-12-20 11:03 ` Blue Swirl
2009-12-20 22:57 ` Paul Brook
2009-12-21 2:00 ` Richard Henderson
2009-12-21 9:13 ` Laurent Desnogues
2009-12-21 9:47 ` [Qemu-devel] " Paolo Bonzini
2009-12-21 10:03 ` Laurent Desnogues [this message]
2009-12-21 20:28 ` [Qemu-devel] " Richard Henderson
2009-12-21 22:21 ` Laurent Desnogues
2009-12-21 22:50 ` Richard Henderson
2009-12-21 23:08 ` Laurent Desnogues
2009-12-22 0:02 ` Richard Henderson
2009-12-22 14:46 ` Laurent Desnogues
2009-12-22 7:19 ` Aurelien Jarno
2009-12-21 10:08 ` Aurelien Jarno
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