[Mesa-dev] [RFC 1/2] spirv: add/hookup SpvCapabilityStencilExportEXT

[Iago Toral]

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

On Sun, 2018-02-11 at 18:26 -0800, Gustavo Lima Chaves wrote:
> ---
>  src/compiler/shader_info.h         | 1 +
>  src/compiler/spirv/spirv_to_nir.c  | 4 ++++
>  src/compiler/spirv/vtn_variables.c | 4 ++++
>  3 files changed, 9 insertions(+)
> 
> diff --git a/src/compiler/shader_info.h b/src/compiler/shader_info.h
> index f6dedb8d62..0480af5be7 100644
> --- a/src/compiler/shader_info.h
> +++ b/src/compiler/shader_info.h
> @@ -43,6 +43,7 @@ struct spirv_supported_capabilities {
>     bool multiview;
>     bool variable_pointers;
>     bool storage_16bit;
> +   bool stencil_export;
>  };
>  
>  typedef struct shader_info {
> diff --git a/src/compiler/spirv/spirv_to_nir.c
> b/src/compiler/spirv/spirv_to_nir.c
> index c6df764682..e00dcafa12 100644
> --- a/src/compiler/spirv/spirv_to_nir.c
> +++ b/src/compiler/spirv/spirv_to_nir.c
> @@ -3196,6 +3196,10 @@ vtn_handle_preamble_instruction(struct
> vtn_builder *b, SpvOp opcode,
>           spv_check_supported(variable_pointers, cap);
>           break;
>  
> +      case SpvCapabilityStencilExportEXT:
> +         spv_check_supported(stencil_export, cap);
> +         break;
> +
>        case SpvCapabilityStorageUniformBufferBlock16:
>        case SpvCapabilityStorageUniform16:
>        case SpvCapabilityStoragePushConstant16:
> diff --git a/src/compiler/spirv/vtn_variables.c
> b/src/compiler/spirv/vtn_variables.c
> index ead68b4784..36976798e9 100644
> --- a/src/compiler/spirv/vtn_variables.c
> +++ b/src/compiler/spirv/vtn_variables.c
> @@ -1294,6 +1294,10 @@ vtn_get_builtin_location(struct vtn_builder
> *b,
>        *location = SYSTEM_VALUE_VIEW_INDEX;
>        set_mode_system_value(b, mode);
>        break;
> +   case SpvBuiltInFragStencilRefEXT:
> +      *location = FRAG_RESULT_STENCIL;
> +      vtn_assert(*mode == nir_var_shader_out);
> +      break;
>     default:
>        vtn_fail("unsupported builtin");
>     }