[Mesa-dev] [PATCH 4/4] i965: Use sendc for all render target writes on Gen6+.

[Eric Anholt]

Paul Berry <stereotype441 at gmail.com> writes:

> The sendc instruction causes the fragment shader thread to wait for
> any dependent threads (i.e. threads rendering to overlapping pixels)
> to complete before sending the message.  We need to use sendc on the
> first render target write in order to guarantee that fragment shader
> outputs are written to the render target in the correct order.

Reviewed-by: Eric Anholt <eric at anholt.net>
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