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Re: [Qemu-devel] [PATCH v3 2/2] target-mips: Misaligned memory accesses
From: |
Leon Alrae |
Subject: |
Re: [Qemu-devel] [PATCH v3 2/2] target-mips: Misaligned memory accesses for MSA |
Date: |
Wed, 13 May 2015 21:59:44 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:8.0) Gecko/20111124 Thunderbird/8.0 |
On 13/05/15 20:58, Richard Henderson wrote:
> On 05/13/2015 12:56 PM, Maciej W. Rozycki wrote:
>> We must have a way to deal with memory access operations issued by a
>> single machine instruction crossing a page boundary already as this is
>> what MIPS16 SAVE and RESTORE instructions as well as microMIPS SWP, SDP,
>> SWM, SDM, LWP, LDP, LWM and LDM ones do. Perhaps these are worth
>> looking into and their approach copying (or reusing) here?
>
> Certainly we do. It's all in softmmu_template.h.
I believe the problem is that MSA vector register's size is 16-bytes
(this DATA_SIZE isn't supported in softmmu_template) and MSA load/store
is supposed to be atomic.
Leon
- [Qemu-devel] [PATCH v3 0/2] target-mips: Add support for misaligned accesses, Yongbok Kim, 2015/05/13
- [Qemu-devel] [PATCH v3 1/2] target-mips: Misaligned memory accesses for R6, Yongbok Kim, 2015/05/13
- [Qemu-devel] [PATCH v3 2/2] target-mips: Misaligned memory accesses for MSA, Yongbok Kim, 2015/05/13
- Re: [Qemu-devel] [PATCH v3 2/2] target-mips: Misaligned memory accesses for MSA, Richard Henderson, 2015/05/13
- Re: [Qemu-devel] [PATCH v3 2/2] target-mips: Misaligned memory accesses for MSA, Maciej W. Rozycki, 2015/05/13
- Re: [Qemu-devel] [PATCH v3 2/2] target-mips: Misaligned memory accesses for MSA, Richard Henderson, 2015/05/13
- Re: [Qemu-devel] [PATCH v3 2/2] target-mips: Misaligned memory accesses for MSA,
Leon Alrae <=
- Re: [Qemu-devel] [PATCH v3 2/2] target-mips: Misaligned memory accesses for MSA, Maciej W. Rozycki, 2015/05/13
- Re: [Qemu-devel] [PATCH v3 2/2] target-mips: Misaligned memory accesses for MSA, Richard Henderson, 2015/05/13
- Re: [Qemu-devel] [PATCH v3 2/2] target-mips: Misaligned memory accesses for MSA, Maciej W. Rozycki, 2015/05/13
- Re: [Qemu-devel] [PATCH v3 2/2] target-mips: Misaligned memory accesses for MSA, Leon Alrae, 2015/05/14
- Re: [Qemu-devel] [PATCH v3 2/2] target-mips: Misaligned memory accesses for MSA, Maciej W. Rozycki, 2015/05/14
- Re: [Qemu-devel] [PATCH v3 2/2] target-mips: Misaligned memory accesses for MSA, Richard Henderson, 2015/05/13
- Re: [Qemu-devel] [PATCH v3 2/2] target-mips: Misaligned memory accesses for MSA, Yongbok Kim, 2015/05/14
- Re: [Qemu-devel] [PATCH v3 2/2] target-mips: Misaligned memory accesses for MSA, Yongbok Kim, 2015/05/14
- Re: [Qemu-devel] [PATCH v3 2/2] target-mips: Misaligned memory accesses for MSA, Richard Henderson, 2015/05/14
- Re: [Qemu-devel] [PATCH v3 2/2] target-mips: Misaligned memory accesses for MSA, Leon Alrae, 2015/05/14