[Mesa-dev] [PATCH 15/28] i965/blorp: Add a param array to prog_data

[Pohjolainen, Topi]

On Tue, May 10, 2016 at 04:16:35PM -0700, Jason Ekstrand wrote:
> This array allows the push constants to be re-arranged on upload.  The
> actual arrangement will, eventually, come from the back-end compiler.
> ---
>  src/mesa/drivers/dri/i965/brw_blorp.c  |  4 ++++
>  src/mesa/drivers/dri/i965/brw_blorp.h  |  6 ++++++
>  src/mesa/drivers/dri/i965/gen6_blorp.c | 12 +++++++-----
>  3 files changed, 17 insertions(+), 5 deletions(-)
> 
> diff --git a/src/mesa/drivers/dri/i965/brw_blorp.c b/src/mesa/drivers/dri/i965/brw_blorp.c
> index 4bbe45f..1379804 100644
> --- a/src/mesa/drivers/dri/i965/brw_blorp.c
> +++ b/src/mesa/drivers/dri/i965/brw_blorp.c
> @@ -139,6 +139,10 @@ brw_blorp_prog_data_init(struct brw_blorp_prog_data *prog_data)
>  {
>     prog_data->first_curbe_grf = 0;
>     prog_data->persample_msaa_dispatch = false;
> +
> +   prog_data->nr_params = BRW_BLORP_NUM_PUSH_CONSTANT_DWORDS;
> +   for (unsigned i = 0; i < BRW_BLORP_NUM_PUSH_CONSTANT_DWORDS; i++)
> +      prog_data->param[i] = i;
>  }
>  
>  
> diff --git a/src/mesa/drivers/dri/i965/brw_blorp.h b/src/mesa/drivers/dri/i965/brw_blorp.h
> index 4a0e46e..c2f33a1 100644
> --- a/src/mesa/drivers/dri/i965/brw_blorp.h
> +++ b/src/mesa/drivers/dri/i965/brw_blorp.h
> @@ -199,6 +199,9 @@ struct brw_blorp_wm_push_constants
>     uint32_t pad[5];
>  };
>  
> +#define BRW_BLORP_NUM_PUSH_CONSTANT_DWORDS \
> +   (sizeof(struct brw_blorp_wm_push_constants) / 4)
> +
>  /* Every 32 bytes of push constant data constitutes one GEN register. */
>  static const unsigned int BRW_BLORP_NUM_PUSH_CONST_REGS =
>     sizeof(struct brw_blorp_wm_push_constants) / 32;
> @@ -212,6 +215,9 @@ struct brw_blorp_prog_data
>      * than one sample per pixel.
>      */
>     bool persample_msaa_dispatch;
> +
> +   uint8_t nr_params;
> +   uint8_t param[BRW_BLORP_NUM_PUSH_CONSTANT_DWORDS];

Do I read this correctly: this corresponds to push_contant_loc in the scalar
backend?

>  };
>  
>  void brw_blorp_prog_data_init(struct brw_blorp_prog_data *prog_data);
> diff --git a/src/mesa/drivers/dri/i965/gen6_blorp.c b/src/mesa/drivers/dri/i965/gen6_blorp.c
> index 1955811..950e2b9 100644
> --- a/src/mesa/drivers/dri/i965/gen6_blorp.c
> +++ b/src/mesa/drivers/dri/i965/gen6_blorp.c
> @@ -308,11 +308,13 @@ gen6_blorp_emit_wm_constants(struct brw_context *brw,
>  {
>     uint32_t wm_push_const_offset;
>  
> -   void *constants = brw_state_batch(brw, AUB_TRACE_WM_CONSTANTS,
> -                                     sizeof(params->wm_push_consts),
> -                                     32, &wm_push_const_offset);
> -   memcpy(constants, &params->wm_push_consts,
> -          sizeof(params->wm_push_consts));
> +   uint32_t *constants = brw_state_batch(brw, AUB_TRACE_WM_CONSTANTS,
> +                                         sizeof(params->wm_push_consts),
> +                                         32, &wm_push_const_offset);
> +
> +   uint32_t *push_consts = (uint32_t *)&params->wm_push_consts;
> +   for (unsigned i = 0; i < params->wm_prog_data->nr_params; i++)
> +      constants[i] = push_consts[params->wm_prog_data->param[i]];
>  
>     return wm_push_const_offset;
>  }
> -- 
> 2.5.0.400.gff86faf
> 
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