[Mesa-dev] [PATCH 2/2] gallium/docs: minor clarification for TXQ instruction

[Ilia Mirkin]

On Thu, Jul 10, 2014 at 11:46 AM, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
> On Thu, Jul 10, 2014 at 11:43 AM, Brian Paul <brianp at vmware.com> wrote:
>> ---
>>  src/gallium/docs/source/tgsi.rst |    2 ++
>>  1 file changed, 2 insertions(+)
>>
>> diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst
>> index 8cbb3d8..c267b2c 100644
>> --- a/src/gallium/docs/source/tgsi.rst
>> +++ b/src/gallium/docs/source/tgsi.rst
>> @@ -968,6 +968,8 @@ XXX doesn't look like most of the opcodes really belong here.
>>    Also return the number of accessible levels (last_level - first_level + 1)
>>    in W.
>>
>> +  For components that aren't used, the returned values are undefined.
>> +
>
> Perhaps I'm just not seeing something obvious... but what does this
> mean? I'm reading this as "If you don't look at a component of the
> return value, then unbeknownst to you, since you're not looking at it,
> the value is undefined."

Oh. I just got what you were saying. Perhaps phrase this as

"For non-existent dimensions, the returned values are undefined"?

>
>>  .. math::
>>
>>    lod = src0.x
>> --
>> 1.7.10.4
>>
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