Re: x86 32 bit register write

No idea, I am not working at AMD :)

-----Original Message-----
From: Xin Tong [mailto:[email protected]] 
Sent: Monday, November 05, 2012 5:25 PM
To: Stanislav
Cc: [email protected]
Subject: Re: [Bochs-developers] x86 32 bit register write

any particularly interesting reason why this is the way it is today ?

Xin


On Mon, Nov 5, 2012 at 12:25 AM, Stanislav <[email protected]> wrote:
>
>
> -----Original Message-----
> From: Xin Tong [mailto:[email protected]]
> Sent: Monday, November 05, 2012 2:09 AM
> To: [email protected]
> Subject: [Bochs-developers] x86 32 bit register write
>
> does 32bit register write clobber the upper half of the 64 bit 
> register as well in x86. it seems that it does BX_WRITE_32BIT_REGZ 
> defined as writing 64bits and no BX_WRITE_32BIT_REG is defined.
>
> Yes
>
> what about 16 bit write, does it clobber the bits above as well ?
>
> No
>
> Use
> http://developer.amd.com/resources/documentation-articles/developer-gu
> ides-m
> anuals/ for reference
>
>
> Xin
>
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