On Thursday, April 28, 2016 1:40:42 PM PDT Antia Puentes wrote:
> From: "Juan A. Suarez Romero" <jasua...@igalia.com>
>
> In scalar mode, URB read length limit is 15. Abort if we go beyond it.
> ---
> src/mesa/drivers/dri/i965/brw_vec4.cpp | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/src/mesa/drivers/dri/i965/brw_vec4.cpp b/src/mesa/drivers/dri/
i965/brw_vec4.cpp
> index 9816f0d..04287fb 100644
> --- a/src/mesa/drivers/dri/i965/brw_vec4.cpp
> +++ b/src/mesa/drivers/dri/i965/brw_vec4.cpp
> @@ -2148,6 +2148,14 @@ brw_compile_vs(const struct brw_compiler *compiler,
void *log_data,
> prog_data->base.urb_read_length =
> DIV_ROUND_UP(MAX2(nr_attribute_slots, 1), 2);
>
> + if (is_scalar && prog_data->base.urb_read_length > 15) {
> + if (error_str)
> + *error_str = ralloc_strdup(mem_ctx,
> + "Too many attributes. Try to reduce the
"
> + "number of attributes or their size");
> + return NULL;
> + }
> +
> prog_data->nr_attributes = nr_attributes;
> prog_data->nr_attribute_slots = nr_attribute_slots;
>
> Have you hit this limit? I'm probably doing my math wrong, but it doesn't seem like we should ever hit it... I'm not sure we can legally just say no - we may need to resort to pulling URB data... --Ken
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