Re: [Qemu-devel] [v2 PATCH] target-mips: implement UserLocal Register

[Petar Jovanovic]

> The normal way to handle this is to end the translation block whenever we 
> issue
> an instruction that could (unpredictably) affect how the TB is translated.

> In the mips translator, this is done via "ctx->bstate = BS_STOP".
> There are plenty of examples within gen_mtc0 already.

Yes, I am aware of that, but this is not the case for HWrena in the code
right now. Is it really cost-effective to force end of translation block in
this case?

P.

________________________________________
From: Richard Henderson address@hidden on behalf of Richard Henderson 
address@hidden
Sent: Tuesday, May 27, 2014 7:20 PM
To: Petar Jovanovic; Petar Jovanovic; address@hidden
Cc: address@hidden; James Hogan
Subject: Re: [v2 PATCH] target-mips: implement UserLocal Register

On 05/27/2014 09:46 AM, Petar Jovanovic wrote:
> Can you please add more thoughts on this? Within the same translation block,
> we can have an instruction that alters HWrena (mtc0) and rdwhr instruction 
> that
> will behave differently based on content of HWrena.

The normal way to handle this is to end the translation block whenever we issue
an instruction that could (unpredictably) affect how the TB is translated.

In the mips translator, this is done via "ctx->bstate = BS_STOP".
There are plenty of examples within gen_mtc0 already.


r~