[Mesa-dev] [PATCH v3 29/44] i965/fs: Handle nir shared variable load intrinsic

[Iago Toral]

Reviewed-by: Iago Toral Quiroga <itoral at igalia.com>

On Tue, 2015-12-01 at 00:19 -0800, Jordan Justen wrote:
> v3:
>  * Remove extra #includes (Iago)
>  * Use recently added GEN7_BTI_SLM instead of BRW_SLM_SURFACE_INDEX (curro)
> 
> Signed-off-by: Jordan Justen <jordan.l.justen at intel.com>
> Cc: Iago Toral Quiroga <itoral at igalia.com>
> ---
>  src/mesa/drivers/dri/i965/brw_fs_nir.cpp | 28 ++++++++++++++++++++++++++++
>  1 file changed, 28 insertions(+)
> 
> diff --git a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
> index 9b50e4e..12a8b59 100644
> --- a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
> +++ b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
> @@ -2444,6 +2444,34 @@ fs_visitor::nir_emit_intrinsic(const fs_builder &bld, nir_intrinsic_instr *instr
>        break;
>     }
>  
> +   case nir_intrinsic_load_shared_indirect:
> +      has_indirect = true;
> +      /* fallthrough */
> +   case nir_intrinsic_load_shared: {
> +      assert(devinfo->gen >= 7);
> +
> +      fs_reg surf_index = brw_imm_ud(GEN7_BTI_SLM);
> +
> +      /* Get the offset to read from */
> +      fs_reg offset_reg;
> +      if (has_indirect) {
> +         offset_reg = get_nir_src(instr->src[0]);
> +      } else {
> +         offset_reg = brw_imm_ud(instr->const_index[0]);
> +      }
> +
> +      /* Read the vector */
> +      fs_reg read_result = emit_untyped_read(bld, surf_index, offset_reg,
> +                                             1 /* dims */,
> +                                             instr->num_components,
> +                                             BRW_PREDICATE_NONE);
> +      read_result.type = dest.type;
> +      for (int i = 0; i < instr->num_components; i++)
> +         bld.MOV(offset(dest, bld, i), offset(read_result, bld, i));
> +
> +      break;
> +   }
> +
>     case nir_intrinsic_load_input_indirect:
>        has_indirect = true;
>        /* fallthrough */