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Re: [Qemu-devel] [PATCH 01/10] target-arm: Make Neon helper routines use
From: |
Peter Maydell |
Subject: |
Re: [Qemu-devel] [PATCH 01/10] target-arm: Make Neon helper routines use correct FP status |
Date: |
Sun, 3 Apr 2011 12:21:49 +0100 |
On 3 April 2011 12:10, Blue Swirl <address@hidden> wrote:
> On Sun, Apr 3, 2011 at 1:51 PM, Peter Maydell <address@hidden> wrote:
>> But I can submit a patch to do that if it's the right thing.
>
> It's not so much about correctness, but performance. All generated
> code already has access to global env, so passing it via helper
> arguments requires extra instructions which can be avoided.
Yes; I meant "right thing" in the more general senses of "is best
practice for qemu code" and "causes my patches to be accepted" :-)
Anyway, how about I do a version of this patch which moves
the affected neon helpers to op_helper.c rather than adding
an env parameter (which would avoid changes that a cleanup
would just have to revert); but leave patch 10 as-is (that's
the one which is touching vfp helpers, but it is just cleanup
which isn't changing how they handle env) ?
Then I can do a separate patchset to move other helpers,
rather than tangling a code-cleanup patchset with Neon
correctness fixes.
-- PMM
- [Qemu-devel] [PATCH 07/10] target-arm: Use new softfloat min/max functions for VMAX, VMIN, (continued)
- [Qemu-devel] [PATCH 07/10] target-arm: Use new softfloat min/max functions for VMAX, VMIN, Peter Maydell, 2011/04/01
- [Qemu-devel] [PATCH 10/10] target-arm/helper.c: For float-int conversion helpers pass ints as ints, Peter Maydell, 2011/04/01
- [Qemu-devel] [PATCH 04/10] target-arm: Fix VCLE.F32 #0, VCLT.F32 #0 NaN handling, Peter Maydell, 2011/04/01
- [Qemu-devel] [PATCH 01/10] target-arm: Make Neon helper routines use correct FP status, Peter Maydell, 2011/04/01
- Re: [Qemu-devel] [PATCH 01/10] target-arm: Make Neon helper routines use correct FP status, Blue Swirl, 2011/04/01
- Re: [Qemu-devel] [PATCH 01/10] target-arm: Make Neon helper routines use correct FP status, Peter Maydell, 2011/04/01
- Re: [Qemu-devel] [PATCH 01/10] target-arm: Make Neon helper routines use correct FP status, Blue Swirl, 2011/04/03
- Re: [Qemu-devel] [PATCH 01/10] target-arm: Make Neon helper routines use correct FP status, Peter Maydell, 2011/04/03
- Re: [Qemu-devel] [PATCH 01/10] target-arm: Make Neon helper routines use correct FP status, Blue Swirl, 2011/04/03
- Re: [Qemu-devel] [PATCH 01/10] target-arm: Make Neon helper routines use correct FP status,
Peter Maydell <=
- Re: [Qemu-devel] [PATCH 01/10] target-arm: Make Neon helper routines use correct FP status, Blue Swirl, 2011/04/03
- Re: [Qemu-devel] [PATCH 01/10] target-arm: Make Neon helper routines use correct FP status, Aurelien Jarno, 2011/04/03
- Re: [Qemu-devel] [PATCH 01/10] target-arm: Make Neon helper routines use correct FP status, Peter Maydell, 2011/04/03
- Re: [Qemu-devel] [PATCH 01/10] target-arm: Make Neon helper routines use correct FP status, Aurelien Jarno, 2011/04/03
[Qemu-devel] [PATCH 05/10] target-arm: Correct ABD's handling of negative zeroes, Peter Maydell, 2011/04/01
[Qemu-devel] [PATCH 03/10] target-arm: Return right result for Neon comparison with NaNs, Peter Maydell, 2011/04/01
[Qemu-devel] [PATCH 08/10] target-arm: Fix VLD of single element to all lanes, Peter Maydell, 2011/04/01
Re: [Qemu-devel] [PATCH 00/10] [PULL] ARM Neon fixes, Aurelien Jarno, 2011/04/03