[Mesa-dev] [PATCH v6 1/2] spirv: add/hookup SpvCapabilityStencilExportEXT

[Caio Marcelo de Oliveira Filho]

From: Gustavo Lima Chaves <gustavo.lima.chaves at intel.com>

Reviewed-by: Jason Ekstrand <jason at jlekstrand.net>
Reviewed-by: Iago Toral Quiroga <itoral at igalia.com>
---

This is the original patch from Gustavo Lima Chaves rebased and
with the added R-b's.

 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 afc53a88405..81f844d36ae 100644
--- a/src/compiler/shader_info.h
+++ b/src/compiler/shader_info.h
@@ -56,6 +56,7 @@ struct spirv_supported_capabilities {
    bool trinary_minmax;
    bool descriptor_array_dynamic_indexing;
    bool runtime_descriptor_array;
+   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 78437428aa7..6c0551603ea 100644
--- a/src/compiler/spirv/spirv_to_nir.c
+++ b/src/compiler/spirv/spirv_to_nir.c
@@ -3396,6 +3396,10 @@ vtn_handle_preamble_instruction(struct vtn_builder *b, SpvOp opcode,
          spv_check_supported(runtime_descriptor_array, cap);
          break;
 
+      case SpvCapabilityStencilExportEXT:
+         spv_check_supported(stencil_export, cap);
+         break;
+
       default:
          vtn_fail("Unhandled capability");
       }
diff --git a/src/compiler/spirv/vtn_variables.c b/src/compiler/spirv/vtn_variables.c
index fd8ab7f247a..53bee1b9288 100644
--- a/src/compiler/spirv/vtn_variables.c
+++ b/src/compiler/spirv/vtn_variables.c
@@ -1354,6 +1354,10 @@ vtn_get_builtin_location(struct vtn_builder *b,
       *location = SYSTEM_VALUE_SUBGROUP_LT_MASK,
       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");
    }
-- 
2.17.0