spirv: add support for SPV_KHR_post_depth_coverage

Allow the capability to be exposed, and convert the new execution mode
into fs state.

Signed-off-by: Ilia Mirkin <[email protected]>
Reviewed-by: Lionel Landwerlin <[email protected]>
Reviewed-by: Jason Ekstrand <[email protected]>

2 files changed, 10 insertions, 0 deletions

diff --git a/src/compiler/shader_info.h b/src/compiler/shader_info.h
index 3b95d5962c0..e9ca222dea8 100644
--- a/src/compiler/shader_info.h
+++ b/src/compiler/shader_info.h
@@ -59,6 +59,7 @@ struct spirv_supported_capabilities {
    bool stencil_export;
    bool atomic_storage;
    bool storage_8bit;
+   bool post_depth_coverage;
 };
 
 typedef struct shader_info {
diff --git a/src/compiler/spirv/spirv_to_nir.c b/src/compiler/spirv/spirv_to_nir.c
index bbef3fcf4df..79104695f5f 100644
--- a/src/compiler/spirv/spirv_to_nir.c
+++ b/src/compiler/spirv/spirv_to_nir.c
@@ -3542,6 +3542,10 @@ vtn_handle_preamble_instruction(struct vtn_builder *b, SpvOp opcode,
          spv_check_supported(stencil_export, cap);
          break;
 
+      case SpvCapabilitySampleMaskPostDepthCoverage:
+         spv_check_supported(post_depth_coverage, cap);
+         break;
+
       default:
          vtn_fail("Unhandled capability");
       }
@@ -3609,6 +3613,11 @@ vtn_handle_execution_mode(struct vtn_builder *b, struct vtn_value *entry_point,
       b->shader->info.fs.early_fragment_tests = true;
       break;
 
+   case SpvExecutionModePostDepthCoverage:
+      vtn_assert(b->shader->info.stage == MESA_SHADER_FRAGMENT);
+      b->shader->info.fs.post_depth_coverage = true;
+      break;
+
    case SpvExecutionModeInvocations:
       vtn_assert(b->shader->info.stage == MESA_SHADER_GEOMETRY);
       b->shader->info.gs.invocations = MAX2(1, mode->literals[0]);