radeonsi: lower compute shader arguments

Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

2 files changed, 50 insertions, 0 deletions

diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index c26960b..68171c8 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -1282,6 +1282,36 @@ static void declare_system_value(
 		value = get_primitive_id(&radeon_bld->soa.bld_base, 0);
 		break;
 
+	case TGSI_SEMANTIC_GRID_SIZE:
+		value = LLVMGetParam(radeon_bld->main_fn, SI_PARAM_GRID_SIZE);
+		break;
+
+	case TGSI_SEMANTIC_BLOCK_SIZE:
+	{
+		LLVMValueRef values[3];
+		unsigned i;
+		unsigned *properties = ctx->shader->selector->info.properties;
+		unsigned sizes[3] = {
+			properties[TGSI_PROPERTY_CS_FIXED_BLOCK_WIDTH],
+			properties[TGSI_PROPERTY_CS_FIXED_BLOCK_HEIGHT],
+			properties[TGSI_PROPERTY_CS_FIXED_BLOCK_DEPTH]
+		};
+
+		for (i = 0; i < 3; ++i)
+			values[i] = lp_build_const_int32(gallivm, sizes[i]);
+
+		value = lp_build_gather_values(gallivm, values, 3);
+		break;
+	}
+
+	case TGSI_SEMANTIC_BLOCK_ID:
+		value = LLVMGetParam(radeon_bld->main_fn, SI_PARAM_BLOCK_ID);
+		break;
+
+	case TGSI_SEMANTIC_THREAD_ID:
+		value = LLVMGetParam(radeon_bld->main_fn, SI_PARAM_THREAD_ID);
+		break;
+
 	default:
 		assert(!"unknown system value");
 		return;
@@ -4823,6 +4853,14 @@ static void create_function(struct si_shader_context *ctx)
 		}
 		break;
 
+	case TGSI_PROCESSOR_COMPUTE:
+		params[SI_PARAM_GRID_SIZE] = v3i32;
+		params[SI_PARAM_BLOCK_ID] = v3i32;
+		last_sgpr = SI_PARAM_BLOCK_ID;
+
+		params[SI_PARAM_THREAD_ID] = v3i32;
+		num_params = SI_PARAM_THREAD_ID + 1;
+		break;
 	default:
 		assert(0 && "unimplemented shader");
 		return;
@@ -5600,6 +5638,7 @@ void si_dump_shader_key(unsigned shader, union si_shader_key *key, FILE *f)
 		break;
 
 	case PIPE_SHADER_GEOMETRY:
+	case PIPE_SHADER_COMPUTE:
 		break;
 
 	case PIPE_SHADER_FRAGMENT:
@@ -5784,6 +5823,8 @@ int si_compile_tgsi_shader(struct si_screen *sscreen,
 		else
 			bld_base->emit_epilogue = si_llvm_return_fs_outputs;
 		break;
+	case TGSI_PROCESSOR_COMPUTE:
+		break;
 	default:
 		assert(!"Unsupported shader type");
 		return -1;
diff --git a/src/gallium/drivers/radeonsi/si_shader.h b/src/gallium/drivers/radeonsi/si_shader.h
index dab572c..738ddf6 100644
--- a/src/gallium/drivers/radeonsi/si_shader.h
+++ b/src/gallium/drivers/radeonsi/si_shader.h
@@ -122,6 +122,10 @@ enum {
 	/* PS only */
 	SI_SGPR_ALPHA_REF	= SI_NUM_RESOURCE_SGPRS,
 	SI_PS_NUM_USER_SGPR,
+
+	/* CS only */
+	SI_SGPR_GRID_SIZE = SI_NUM_RESOURCE_SGPRS,
+	SI_CS_NUM_USER_SGPR = SI_SGPR_GRID_SIZE + 3
 };
 
 /* LLVM function parameter indices */
@@ -198,6 +202,11 @@ enum {
 	SI_PARAM_SAMPLE_COVERAGE,
 	SI_PARAM_POS_FIXED_PT,
 
+	/* CS only parameters */
+	SI_PARAM_GRID_SIZE = SI_NUM_RESOURCE_PARAMS,
+	SI_PARAM_BLOCK_ID,
+	SI_PARAM_THREAD_ID,
+
 	SI_NUM_PARAMS = SI_PARAM_POS_FIXED_PT + 9, /* +8 for COLOR[0..1] */
 };