Re: [tcf-dev] Question on bit field sizes.

["Rohrbach, Randy" <randy.rohrbach@xxxxxxxxxxxxx>]

Hi,

Eugene

 

    Thanks for the explanation.

 

    I understand a lot better now.

 

Thx

Randy

 

From: tcf-dev-bounces@xxxxxxxxxxx [mailto:tcf-dev-bounces@xxxxxxxxxxx] On Behalf Of Eugene Tarassov
Sent: Friday, October 05, 2012 12:58 PM
To: TCF Development
Subject: Re: [tcf-dev] Question on bit field sizes.

 

Hi Randy,

 

Size 0 means you cannot access the register (or bit field) with get/set commands.

If an agent supports get/set for a bit filed, the size should be non-zero.

If the size is zero, clients are supposed to get parent register value and extract field bits themselves.

 

>   I thought the convention ( my interpretation anyway ) was that a size of “0” indicated that this register is a grouping placeholder.

 

Group can have non-zero size, it would mean the agent supports get/set for the whole group with a single command.

 

Regards,

Eugene

 

 

From: tcf-dev-bounces@xxxxxxxxxxx [mailto:tcf-dev-bounces@xxxxxxxxxxx] On Behalf Of Rohrbach, Randy
Sent: Friday, October 05, 2012 6:17 AM
To: TCF Development
Subject: [tcf-dev] Question on bit field sizes.

 

Hi,

Folks

 

    In reading the register specification documentation, I am a little uncertain about something.

 

    With our own agent, when I retrieve registers which represent bit fields of a parent

    register, we are returning for a set of valid bit fields the following.

 

         RegistersContext.getBitNumbers() an array of bit numbers

         RegisterContext.getSize() is returning 0.

 

   I thought the convention ( my interpretation anyway ) was that a size of “0” indicated

   that this register is a grouping placeholder.

 

   So my question is simply what does a size of “0” mean and under what circumstances

   we will see this. I am assuming that a register which is representing bits in the parent,

   would have a non-zero size, since it represents at least one or more bits.

 

Thx,

Randy

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