r600: workout bitmask for the used tcs inputs/outputs.

This is used later to setup the constants to be given
to the tessellation shaders.

Signed-off-by: Dave Airlie <[email protected]>

2 files changed, 28 insertions, 0 deletions

diff --git a/src/gallium/drivers/r600/r600_pipe.h b/src/gallium/drivers/r600/r600_pipe.h
index 068e2f8a302..ac06d1f51b6 100644
--- a/src/gallium/drivers/r600/r600_pipe.h
+++ b/src/gallium/drivers/r600/r600_pipe.h
@@ -330,6 +330,9 @@ struct r600_pipe_shader_selector {
 	unsigned	gs_max_out_vertices;
 	unsigned	gs_num_invocations;
 
+	/* TCS/VS */
+	uint64_t        lds_patch_outputs_written_mask;
+	uint64_t        lds_outputs_written_mask;
 	unsigned	nr_ps_max_color_exports;
 };
 
diff --git a/src/gallium/drivers/r600/r600_state_common.c b/src/gallium/drivers/r600/r600_state_common.c
index ab8a2c142cd..0c8ed524e76 100644
--- a/src/gallium/drivers/r600/r600_state_common.c
+++ b/src/gallium/drivers/r600/r600_state_common.c
@@ -855,6 +855,7 @@ static void *r600_create_shader_state(struct pipe_context *ctx,
 			       unsigned pipe_shader_type)
 {
 	struct r600_pipe_shader_selector *sel = CALLOC_STRUCT(r600_pipe_shader_selector);
+	int i;
 
 	sel->type = pipe_shader_type;
 	sel->tokens = tgsi_dup_tokens(state->tokens);
@@ -870,6 +871,30 @@ static void *r600_create_shader_state(struct pipe_context *ctx,
 		sel->gs_num_invocations =
 			sel->info.properties[TGSI_PROPERTY_GS_INVOCATIONS];
 		break;
+	case PIPE_SHADER_VERTEX:
+	case PIPE_SHADER_TESS_CTRL:
+		sel->lds_patch_outputs_written_mask = 0;
+		sel->lds_outputs_written_mask = 0;
+
+		for (i = 0; i < sel->info.num_outputs; i++) {
+			unsigned name = sel->info.output_semantic_name[i];
+			unsigned index = sel->info.output_semantic_index[i];
+
+			switch (name) {
+			case TGSI_SEMANTIC_TESSINNER:
+			case TGSI_SEMANTIC_TESSOUTER:
+			case TGSI_SEMANTIC_PATCH:
+				sel->lds_patch_outputs_written_mask |=
+					1llu << r600_get_lds_unique_index(name, index);
+				break;
+			default:
+				sel->lds_outputs_written_mask |=
+					1llu << r600_get_lds_unique_index(name, index);
+			}
+		}
+		break;
+	default:
+		break;
 	}
 
 	return sel;