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Re: [Qemu-devel] mfocrf missing on e500v2

From: Alexander Graf
Subject: Re: [Qemu-devel] mfocrf missing on e500v2
Date: Fri, 6 Mar 2015 18:23:52 +0100

> Am 06.03.2015 um 18:20 schrieb Maciej W. Rozycki <address@hidden>:
>> On Fri, 6 Mar 2015, Alexander Graf wrote:
>> I've finally managed to check out why my e500v2 automated tests fail to
>> run. Apparently they break because autotest wants to execute target code
>> and runs into an illegal instruction while doing that:
>> Program received signal SIGILL, Illegal instruction.
>> 0xb57c84cc in ?? ()
>> (gdb) x /i $pc
>> => 0xb57c84cc:    mfocrf  r0,1
>> And lo and behold, I really couldn't find any reference to mfocrf in the
>> e500v2 spec.
> Do real e500 processors trap on this operation as well?  

The illegal instruction I posted about above was when running qemu *on* e500v2, 
because TCG emits mfocrf ;).


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