radeonsi: don't read tcs_out_lds_layout.vertex_size from an SGPR

TCS outputs are usually not written to LDS, so no stats here.

Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

3 files changed, 20 insertions, 6 deletions

diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index 96ba907a08..9117aec5b7 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -326,6 +326,23 @@ get_tcs_out_patch_stride(struct si_shader_context *ctx)
 	return unpack_param(ctx, ctx->param_tcs_out_lds_layout, 0, 13);
 }
 
+static unsigned get_tcs_out_vertex_dw_stride_constant(struct si_shader_context *ctx)
+{
+	assert(ctx->type == PIPE_SHADER_TESS_CTRL);
+
+	if (ctx->shader->key.mono.u.ff_tcs_inputs_to_copy)
+		return util_last_bit64(ctx->shader->key.mono.u.ff_tcs_inputs_to_copy) * 4;
+
+	return util_last_bit64(ctx->shader->selector->outputs_written) * 4;
+}
+
+static LLVMValueRef get_tcs_out_vertex_dw_stride(struct si_shader_context *ctx)
+{
+	unsigned stride = get_tcs_out_vertex_dw_stride_constant(ctx);
+
+	return LLVMConstInt(ctx->i32, stride, 0);
+}
+
 static LLVMValueRef
 get_tcs_out_patch0_offset(struct si_shader_context *ctx)
 {
@@ -1086,7 +1103,7 @@ static LLVMValueRef fetch_output_tcs(
 	LLVMValueRef dw_addr, stride;
 
 	if (reg->Register.Dimension) {
-		stride = unpack_param(ctx, ctx->param_tcs_out_lds_layout, 13, 8);
+		stride = get_tcs_out_vertex_dw_stride(ctx);
 		dw_addr = get_tcs_out_current_patch_offset(ctx);
 		dw_addr = get_dw_address(ctx, NULL, reg, stride, dw_addr);
 	} else {
@@ -1139,7 +1156,7 @@ static void store_output_tcs(struct lp_build_tgsi_context *bld_base,
 	}
 
 	if (reg->Register.Dimension) {
-		stride = unpack_param(ctx, ctx->param_tcs_out_lds_layout, 13, 8);
+		stride = get_tcs_out_vertex_dw_stride(ctx);
 		dw_addr = get_tcs_out_current_patch_offset(ctx);
 		dw_addr = get_dw_address(ctx, reg, NULL, stride, dw_addr);
 		skip_lds_store = !sh_info->reads_pervertex_outputs;
diff --git a/src/gallium/drivers/radeonsi/si_shader_internal.h b/src/gallium/drivers/radeonsi/si_shader_internal.h
index 1231ef4946..ad29ab7e84 100644
--- a/src/gallium/drivers/radeonsi/si_shader_internal.h
+++ b/src/gallium/drivers/radeonsi/si_shader_internal.h
@@ -161,8 +161,6 @@ struct si_shader_context {
 	/* Layout of TCS outputs / TES inputs:
 	 *   [0:12] = stride between output patches in DW, num_outputs * num_vertices * 4
 	 *            max = 32*32*4 + 32*4
-	 *   [13:20] = stride between output vertices in DW = num_inputs * 4
-	 *             max = 32*4
 	 *   [26:31] = gl_PatchVerticesIn, max = 32
 	 */
 	int param_tcs_out_lds_layout;
diff --git a/src/gallium/drivers/radeonsi/si_state_draw.c b/src/gallium/drivers/radeonsi/si_state_draw.c
index 363a4aed5d..05ed85475b 100644
--- a/src/gallium/drivers/radeonsi/si_state_draw.c
+++ b/src/gallium/drivers/radeonsi/si_state_draw.c
@@ -233,8 +233,7 @@ static void si_emit_derived_tess_state(struct si_context *sctx,
 
 	tcs_in_layout = S_VS_STATE_LS_OUT_PATCH_SIZE(input_patch_size / 4) |
 			S_VS_STATE_LS_OUT_VERTEX_SIZE(input_vertex_size / 4);
-	tcs_out_layout = (output_patch_size / 4) |
-			 ((output_vertex_size / 4) << 13);
+	tcs_out_layout = output_patch_size / 4;
 	tcs_out_offsets = (output_patch0_offset / 16) |
 			  ((perpatch_output_offset / 16) << 16);
 	offchip_layout = *num_patches |