[Beignet] Gen7 Instructions Opcode Examples

[Dushyant Behl]

Hi Zou,

Thank you for the quick reply.

I'm actually looking into the programmer reference manual for Haswell
processors,
https://01.org/linuxgraphics/documentation/driver-documentation-prms/2013-intel-core-processor-family

Can you point me to the Volume where I can understand the run time
environment setup needed?

Thanks,
Dushyant

On Tue, Jul 7, 2015 at 1:06 PM, Zou, Nanhai <nanhai.zou at intel.com> wrote:

>  Hi,
>
>          Genx instructions are not directly inserted into batch buffer.
>
> The batch buffer contains some reference pointer which will finally point
> to a GPU buffer which contains GPU instructions for a kernel.
>
> The instruction emit code are located in
> backend/src/backend/genx_encoder.cpp
>
>
>
> To execute a kernel,  with only opcode and memory access is not enough.
>
> There is an entire runtime environment need to be set up.
>
> To understand those, I suggest you first study hardware spec at
> https://01.org/zh/linuxgraphics/documentation/hardware-specification-prms
>
>
>
> Thanks
>
> Zou Nanhai
>
>
>
> *From:* Beignet [mailto:beignet-bounces at lists.freedesktop.org] *On Behalf
> Of *Dushyant Behl
> *Sent:* Monday, July 06, 2015 8:49 PM
> *To:* beignet at lists.freedesktop.org
> *Subject:* [Beignet] Gen7 Instructions Opcode Examples
>
>
>
> Hello Guys,
>
>
>
> I'm extremely sorry if I mailed to the wrong mailing list. Please forgive
> me if I've done anything wrong, this is my first message to this mailing
> list.
>
>
>
> I'm a masters student of computer science, I'm trying to understand the
> beignet project and how the batch buffers are submitted to the i915 gpu
> driver.
>
> I have a problem getting hold of the arithmetic instruction formats of the
> Intel Gen7 Haswell processors.
>
> Can anyone please help me by pointing me to the location where beignet
> compiler backend emits compiled instuctions (byte code) in the batchbuffer.
>
> Also I wanted to ask if is possible to test the execution of one single
> instruction like ADD/SUB in the batch buffer by writing the opcodes along
> with some src and dest memory locations directly in batchbuffer rather than
> going through the beignet compiler.
> Can anyone please provide me an example of any such instruction?
>
>
>
> Thanks in advance,
>
>
>
> Dushyant
>
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