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From: Leon Alrae <leon.alrae@imgtec.com>
To: Richard Henderson <rth@twiddle.net>
Cc: Yongbok Kim <yongbok.kim@imgtec.com>,
	peter.maydell@linaro.org, qemu-devel@nongnu.org,
	"Maciej W. Rozycki" <macro@linux-mips.org>,
	afaerber@suse.de
Subject: Re: [Qemu-devel] [PATCH v3 2/2] target-mips: Misaligned memory accesses for MSA
Date: Wed, 13 May 2015 21:59:44 +0100	[thread overview]
Message-ID: <5553BB40.7050706@imgtec.com> (raw)
In-Reply-To: <5553ACF2.7050708@twiddle.net>

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

  reply	other threads:[~2015-05-13 21:00 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-05-13 15:37 [Qemu-devel] [PATCH v3 0/2] target-mips: Add support for misaligned accesses Yongbok Kim
2015-05-13 15:37 ` [Qemu-devel] [PATCH v3 1/2] target-mips: Misaligned memory accesses for R6 Yongbok Kim
2015-05-13 15:37 ` [Qemu-devel] [PATCH v3 2/2] target-mips: Misaligned memory accesses for MSA Yongbok Kim
2015-05-13 19:28   ` Richard Henderson
2015-05-13 19:56     ` Maciej W. Rozycki
2015-05-13 19:58       ` Richard Henderson
2015-05-13 20:59         ` Leon Alrae [this message]
2015-05-13 21:21           ` Maciej W. Rozycki
2015-05-13 21:36             ` Richard Henderson
2015-05-13 22:54               ` Maciej W. Rozycki
2015-05-14  8:51                 ` Leon Alrae
2015-05-14 11:22                   ` Maciej W. Rozycki
2015-05-13 21:31           ` Richard Henderson
2015-05-14  9:00     ` Yongbok Kim
2015-05-14  9:46       ` Yongbok Kim
2015-05-14 18:44         ` Richard Henderson
2015-05-14  9:50     ` Leon Alrae
2015-05-14 15:27       ` Richard Henderson
2015-05-14 19:12         ` Richard Henderson
2015-05-15 12:09           ` Leon Alrae
2015-05-15 13:43             ` Richard Henderson
2015-05-15 14:04               ` Leon Alrae

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