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From: "Hervé Poussineau" <hpoussin@reactos.org>
To: etou.zh@gmail.com
Cc: QEMU Developers <qemu-devel@nongnu.org>
Subject: [Qemu-devel]   r4k doesn't support movz
Date: Fri, 18 May 2012 21:52:06 +0200	[thread overview]
Message-ID: <4FB6A866.5030504@reactos.org> (raw)

Hi,

Zhi-zhou Zhang a écrit :
> I found that when qemu-system-mips64el executed 'movz' with -M mips, 
> it would raise a reserved instruction exception.
> The mips spec describes movz as below:
>
> Mnemonic               Instructio                      Defined in MIPS ISA
> MOVZ            Move Conditional on Zero       MIPS32
>
> I think ISA-64 should support MIPS32 instructions for compatible. am I 
> right?

movz instruction is available on MIPS4 and MIPS32 instruction sets (+ 
Loongson2E/2F CPUs)
However, by default, 'mips' machine on qemu-system-mips64el uses a R4000 
CPU, which is only MIPS3 compatible.
You need to use another cpu which is MIPS4 or MIPS32 compatible with the 
-cpu option.

Regards,

Hervé

             reply	other threads:[~2012-05-18 19:52 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-05-18 19:52 Hervé Poussineau [this message]
  -- strict thread matches above, loose matches on Subject: below --
2012-05-18 11:38 [Qemu-devel] r4k doesn't support movz Zhi-zhou Zhang
2012-05-19  1:02 ` Johnson, Eric
2012-05-19  2:30   ` Jia Liu
2012-05-19  9:02 ` Aurelien Jarno

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