diff options
Diffstat (limited to 'src/gallium/drivers/radeonsi/si_shader.c')
| -rw-r--r-- | src/gallium/drivers/radeonsi/si_shader.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c index ac427210288..83bcf5eac18 100644 --- a/src/gallium/drivers/radeonsi/si_shader.c +++ b/src/gallium/drivers/radeonsi/si_shader.c @@ -671,6 +671,130 @@ static LLVMValueRef get_dw_address(struct si_shader_context *ctx, lp_build_const_int32(gallivm, param * 4), ""); } +/* The offchip buffer layout for TCS->TES is + * + * - attribute 0 of patch 0 vertex 0 + * - attribute 0 of patch 0 vertex 1 + * - attribute 0 of patch 0 vertex 2 + * ... + * - attribute 0 of patch 1 vertex 0 + * - attribute 0 of patch 1 vertex 1 + * ... + * - attribute 1 of patch 0 vertex 0 + * - attribute 1 of patch 0 vertex 1 + * ... + * - per patch attribute 0 of patch 0 + * - per patch attribute 0 of patch 1 + * ... + * + * Note that every attribute has 4 components. + */ +static LLVMValueRef get_tcs_tes_buffer_address(struct si_shader_context *ctx, + LLVMValueRef vertex_index, + LLVMValueRef param_index) +{ + struct gallivm_state *gallivm = ctx->radeon_bld.soa.bld_base.base.gallivm; + LLVMValueRef base_addr, vertices_per_patch, num_patches, total_vertices; + LLVMValueRef param_stride, constant16; + + vertices_per_patch = unpack_param(ctx, SI_PARAM_TCS_OFFCHIP_LAYOUT, 9, 6); + num_patches = unpack_param(ctx, SI_PARAM_TCS_OFFCHIP_LAYOUT, 0, 9); + total_vertices = LLVMBuildMul(gallivm->builder, vertices_per_patch, + num_patches, ""); + + constant16 = lp_build_const_int32(gallivm, 16); + if (vertex_index) { + base_addr = LLVMBuildMul(gallivm->builder, get_rel_patch_id(ctx), + vertices_per_patch, ""); + + base_addr = LLVMBuildAdd(gallivm->builder, base_addr, + vertex_index, ""); + + param_stride = total_vertices; + } else { + base_addr = get_rel_patch_id(ctx); + param_stride = num_patches; + } + + base_addr = LLVMBuildAdd(gallivm->builder, base_addr, + LLVMBuildMul(gallivm->builder, param_index, + param_stride, ""), ""); + + base_addr = LLVMBuildMul(gallivm->builder, base_addr, constant16, ""); + + if (!vertex_index) { + LLVMValueRef patch_data_offset = + unpack_param(ctx, SI_PARAM_TCS_OFFCHIP_LAYOUT, 16, 16); + + base_addr = LLVMBuildAdd(gallivm->builder, base_addr, + patch_data_offset, ""); + } + return base_addr; +} + +static LLVMValueRef get_tcs_tes_buffer_address_from_reg( + struct si_shader_context *ctx, + const struct tgsi_full_dst_register *dst, + const struct tgsi_full_src_register *src) +{ + struct gallivm_state *gallivm = ctx->radeon_bld.soa.bld_base.base.gallivm; + struct tgsi_shader_info *info = &ctx->shader->selector->info; + ubyte *name, *index, *array_first; + struct tgsi_full_src_register reg; + LLVMValueRef vertex_index = NULL; + LLVMValueRef param_index = NULL; + unsigned param_index_base, param_base; + + reg = src ? *src : tgsi_full_src_register_from_dst(dst); + + if (reg.Register.Dimension) { + + if (reg.Dimension.Indirect) + vertex_index = get_indirect_index(ctx, ®.DimIndirect, + reg.Dimension.Index); + else + vertex_index = lp_build_const_int32(gallivm, + reg.Dimension.Index); + } + + /* Get information about the register. */ + if (reg.Register.File == TGSI_FILE_INPUT) { + name = info->input_semantic_name; + index = info->input_semantic_index; + array_first = info->input_array_first; + } else if (reg.Register.File == TGSI_FILE_OUTPUT) { + name = info->output_semantic_name; + index = info->output_semantic_index; + array_first = info->output_array_first; + } else { + assert(0); + return NULL; + } + + if (reg.Register.Indirect) { + if (reg.Indirect.ArrayID) + param_base = array_first[reg.Indirect.ArrayID]; + else + param_base = reg.Register.Index; + + param_index = get_indirect_index(ctx, ®.Indirect, + reg.Register.Index - param_base); + + } else { + param_base = reg.Register.Index; + param_index = lp_build_const_int32(gallivm, 0); + } + + param_index_base = si_shader_io_get_unique_index(name[param_base], + index[param_base]); + + param_index = LLVMBuildAdd(gallivm->builder, param_index, + lp_build_const_int32(gallivm, param_index_base), + ""); + + return get_tcs_tes_buffer_address(ctx, vertex_index, param_index); +} + /* TBUFFER_STORE_FORMAT_{X,XY,XYZ,XYZW} <- the suffix is selected by num_channels=1..4. * The type of vdata must be one of i32 (num_channels=1), v2i32 (num_channels=2), * or v4i32 (num_channels=3,4). */ |