/* * Copyright © 2018 Valve Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. * */ #include #include #include "aco_ir.h" #include "nir.h" #include "vulkan/radv_shader.h" #include "vulkan/radv_descriptor_set.h" #include "vulkan/radv_shader_args.h" #include "sid.h" #include "ac_exp_param.h" #include "ac_shader_util.h" #include "util/u_math.h" #define MAX_INLINE_PUSH_CONSTS 8 namespace aco { struct vs_output_state { uint8_t mask[VARYING_SLOT_VAR31 + 1]; Temp outputs[VARYING_SLOT_VAR31 + 1][4]; }; struct isel_context { const struct radv_nir_compiler_options *options; struct radv_shader_args *args; Program *program; nir_shader *shader; uint32_t constant_data_offset; Block *block; bool *divergent_vals; std::unique_ptr allocated; std::unordered_map> allocated_vec; Stage stage; /* Stage */ bool has_gfx10_wave64_bpermute = false; struct { bool has_branch; uint16_t loop_nest_depth = 0; struct { unsigned header_idx; Block* exit; bool has_divergent_continue = false; bool has_divergent_branch = false; } parent_loop; struct { bool is_divergent = false; } parent_if; bool exec_potentially_empty = false; } cf_info; Temp arg_temps[AC_MAX_ARGS]; /* inputs common for merged stages */ Temp merged_wave_info = Temp(0, s1); /* FS inputs */ Temp persp_centroid, linear_centroid; /* VS inputs */ bool needs_instance_id; /* VS output information */ unsigned num_clip_distances; unsigned num_cull_distances; vs_output_state vs_output; }; Temp get_arg(isel_context *ctx, struct ac_arg arg) { assert(arg.used); return ctx->arg_temps[arg.arg_index]; } unsigned get_interp_input(nir_intrinsic_op intrin, enum glsl_interp_mode interp) { switch (interp) { case INTERP_MODE_SMOOTH: case INTERP_MODE_NONE: if (intrin == nir_intrinsic_load_barycentric_pixel || intrin == nir_intrinsic_load_barycentric_at_sample || intrin == nir_intrinsic_load_barycentric_at_offset) return S_0286CC_PERSP_CENTER_ENA(1); else if (intrin == nir_intrinsic_load_barycentric_centroid) return S_0286CC_PERSP_CENTROID_ENA(1); else if (intrin == nir_intrinsic_load_barycentric_sample) return S_0286CC_PERSP_SAMPLE_ENA(1); break; case INTERP_MODE_NOPERSPECTIVE: if (intrin == nir_intrinsic_load_barycentric_pixel) return S_0286CC_LINEAR_CENTER_ENA(1); else if (intrin == nir_intrinsic_load_barycentric_centroid) return S_0286CC_LINEAR_CENTROID_ENA(1); else if (intrin == nir_intrinsic_load_barycentric_sample) return S_0286CC_LINEAR_SAMPLE_ENA(1); break; default: break; } return 0; } void init_context(isel_context *ctx, nir_shader *shader) { nir_function_impl *impl = nir_shader_get_entrypoint(shader); ctx->shader = shader; ctx->divergent_vals = nir_divergence_analysis(shader, nir_divergence_view_index_uniform); std::unique_ptr allocated{new Temp[impl->ssa_alloc]()}; unsigned spi_ps_inputs = 0; bool done = false; while (!done) { done = true; nir_foreach_block(block, impl) { nir_foreach_instr(instr, block) { switch(instr->type) { case nir_instr_type_alu: { nir_alu_instr *alu_instr = nir_instr_as_alu(instr); unsigned size = alu_instr->dest.dest.ssa.num_components; if (alu_instr->dest.dest.ssa.bit_size == 64) size *= 2; RegType type = RegType::sgpr; switch(alu_instr->op) { case nir_op_fmul: case nir_op_fadd: case nir_op_fsub: case nir_op_fmax: case nir_op_fmin: case nir_op_fmax3: case nir_op_fmin3: case nir_op_fmed3: case nir_op_fneg: case nir_op_fabs: case nir_op_fsat: case nir_op_fsign: case nir_op_frcp: case nir_op_frsq: case nir_op_fsqrt: case nir_op_fexp2: case nir_op_flog2: case nir_op_ffract: case nir_op_ffloor: case nir_op_fceil: case nir_op_ftrunc: case nir_op_fround_even: case nir_op_fsin: case nir_op_fcos: case nir_op_f2f32: case nir_op_f2f64: case nir_op_u2f32: case nir_op_u2f64: case nir_op_i2f32: case nir_op_i2f64: case nir_op_pack_half_2x16: case nir_op_unpack_half_2x16_split_x: case nir_op_unpack_half_2x16_split_y: case nir_op_fddx: case nir_op_fddy: case nir_op_fddx_fine: case nir_op_fddy_fine: case nir_op_fddx_coarse: case nir_op_fddy_coarse: case nir_op_fquantize2f16: case nir_op_ldexp: case nir_op_frexp_sig: case nir_op_frexp_exp: case nir_op_cube_face_index: case nir_op_cube_face_coord: type = RegType::vgpr; break; case nir_op_flt: case nir_op_fge: case nir_op_feq: case nir_op_fne: case nir_op_ilt: case nir_op_ige: case nir_op_ult: case nir_op_uge: case nir_op_ieq: case nir_op_ine: case nir_op_i2b1: size = 2; break; case nir_op_f2i64: case nir_op_f2u64: case nir_op_b2i32: case nir_op_b2f32: case nir_op_f2i32: case nir_op_f2u32: type = ctx->divergent_vals[alu_instr->dest.dest.ssa.index] ? RegType::vgpr : RegType::sgpr; break; case nir_op_bcsel: if (alu_instr->dest.dest.ssa.bit_size == 1) { size = 2; } else { if (ctx->divergent_vals[alu_instr->dest.dest.ssa.index]) { type = RegType::vgpr; } else { if (allocated[alu_instr->src[1].src.ssa->index].type() == RegType::vgpr || allocated[alu_instr->src[2].src.ssa->index].type() == RegType::vgpr) { type = RegType::vgpr; } } if (alu_instr->src[1].src.ssa->num_components == 1 && alu_instr->src[2].src.ssa->num_components == 1) { assert(allocated[alu_instr->src[1].src.ssa->index].size() == allocated[alu_instr->src[2].src.ssa->index].size()); size = allocated[alu_instr->src[1].src.ssa->index].size(); } } break; case nir_op_mov: if (alu_instr->dest.dest.ssa.bit_size == 1) { size = 2; } else { type = ctx->divergent_vals[alu_instr->dest.dest.ssa.index] ? RegType::vgpr : RegType::sgpr; } break; default: if (alu_instr->dest.dest.ssa.bit_size == 1) { size = 2; } else { for (unsigned i = 0; i < nir_op_infos[alu_instr->op].num_inputs; i++) { if (allocated[alu_instr->src[i].src.ssa->index].type() == RegType::vgpr) type = RegType::vgpr; } } break; } allocated[alu_instr->dest.dest.ssa.index] = Temp(0, RegClass(type, size)); break; } case nir_instr_type_load_const: { unsigned size = nir_instr_as_load_const(instr)->def.num_components; if (nir_instr_as_load_const(instr)->def.bit_size == 64) size *= 2; else if (nir_instr_as_load_const(instr)->def.bit_size == 1) size *= 2; allocated[nir_instr_as_load_const(instr)->def.index] = Temp(0, RegClass(RegType::sgpr, size)); break; } case nir_instr_type_intrinsic: { nir_intrinsic_instr *intrinsic = nir_instr_as_intrinsic(instr); if (!nir_intrinsic_infos[intrinsic->intrinsic].has_dest) break; unsigned size = intrinsic->dest.ssa.num_components; if (intrinsic->dest.ssa.bit_size == 64) size *= 2; RegType type = RegType::sgpr; switch(intrinsic->intrinsic) { case nir_intrinsic_load_push_constant: case nir_intrinsic_load_work_group_id: case nir_intrinsic_load_num_work_groups: case nir_intrinsic_load_subgroup_id: case nir_intrinsic_load_num_subgroups: case nir_intrinsic_load_first_vertex: case nir_intrinsic_load_base_instance: case nir_intrinsic_get_buffer_size: case nir_intrinsic_vote_all: case nir_intrinsic_vote_any: case nir_intrinsic_read_first_invocation: case nir_intrinsic_read_invocation: case nir_intrinsic_first_invocation: type = RegType::sgpr; if (intrinsic->dest.ssa.bit_size == 1) size = 2; break; case nir_intrinsic_ballot: type = RegType::sgpr; size = 2; break; case nir_intrinsic_load_sample_id: case nir_intrinsic_load_sample_mask_in: case nir_intrinsic_load_input: case nir_intrinsic_load_vertex_id: case nir_intrinsic_load_vertex_id_zero_base: case nir_intrinsic_load_barycentric_sample: case nir_intrinsic_load_barycentric_pixel: case nir_intrinsic_load_barycentric_centroid: case nir_intrinsic_load_barycentric_at_sample: case nir_intrinsic_load_barycentric_at_offset: case nir_intrinsic_load_interpolated_input: case nir_intrinsic_load_frag_coord: case nir_intrinsic_load_sample_pos: case nir_intrinsic_load_layer_id: case nir_intrinsic_load_local_invocation_id: case nir_intrinsic_load_local_invocation_index: case nir_intrinsic_load_subgroup_invocation: case nir_intrinsic_write_invocation_amd: case nir_intrinsic_mbcnt_amd: case nir_intrinsic_load_instance_id: case nir_intrinsic_ssbo_atomic_add: case nir_intrinsic_ssbo_atomic_imin: case nir_intrinsic_ssbo_atomic_umin: case nir_intrinsic_ssbo_atomic_imax: case nir_intrinsic_ssbo_atomic_umax: case nir_intrinsic_ssbo_atomic_and: case nir_intrinsic_ssbo_atomic_or: case nir_intrinsic_ssbo_atomic_xor: case nir_intrinsic_ssbo_atomic_exchange: case nir_intrinsic_ssbo_atomic_comp_swap: case nir_intrinsic_image_deref_atomic_add: case nir_intrinsic_image_deref_atomic_umin: case nir_intrinsic_image_deref_atomic_imin: case nir_intrinsic_image_deref_atomic_umax: case nir_intrinsic_image_deref_atomic_imax: case nir_intrinsic_image_deref_atomic_and: case nir_intrinsic_image_deref_atomic_or: case nir_intrinsic_image_deref_atomic_xor: case nir_intrinsic_image_deref_atomic_exchange: case nir_intrinsic_image_deref_atomic_comp_swap: case nir_intrinsic_image_deref_size: case nir_intrinsic_shared_atomic_add: case nir_intrinsic_shared_atomic_imin: case nir_intrinsic_shared_atomic_umin: case nir_intrinsic_shared_atomic_imax: case nir_intrinsic_shared_atomic_umax: case nir_intrinsic_shared_atomic_and: case nir_intrinsic_shared_atomic_or: case nir_intrinsic_shared_atomic_xor: case nir_intrinsic_shared_atomic_exchange: case nir_intrinsic_shared_atomic_comp_swap: case nir_intrinsic_load_scratch: type = RegType::vgpr; break; case nir_intrinsic_shuffle: case nir_intrinsic_quad_broadcast: case nir_intrinsic_quad_swap_horizontal: case nir_intrinsic_quad_swap_vertical: case nir_intrinsic_quad_swap_diagonal: case nir_intrinsic_quad_swizzle_amd: case nir_intrinsic_masked_swizzle_amd: case nir_intrinsic_inclusive_scan: case nir_intrinsic_exclusive_scan: if (intrinsic->dest.ssa.bit_size == 1) { size = 2; type = RegType::sgpr; } else if (!ctx->divergent_vals[intrinsic->dest.ssa.index]) { type = RegType::sgpr; } else { type = RegType::vgpr; } break; case nir_intrinsic_load_view_index: type = ctx->stage == fragment_fs ? RegType::vgpr : RegType::sgpr; break; case nir_intrinsic_load_front_face: case nir_intrinsic_load_helper_invocation: case nir_intrinsic_is_helper_invocation: type = RegType::sgpr; size = 2; break; case nir_intrinsic_reduce: if (intrinsic->dest.ssa.bit_size == 1) { size = 2; type = RegType::sgpr; } else if (nir_intrinsic_cluster_size(intrinsic) == 0 || !ctx->divergent_vals[intrinsic->dest.ssa.index]) { type = RegType::sgpr; } else { type = RegType::vgpr; } break; case nir_intrinsic_load_ubo: case nir_intrinsic_load_ssbo: case nir_intrinsic_load_global: case nir_intrinsic_vulkan_resource_index: type = ctx->divergent_vals[intrinsic->dest.ssa.index] ? RegType::vgpr : RegType::sgpr; break; /* due to copy propagation, the swizzled imov is removed if num dest components == 1 */ case nir_intrinsic_load_shared: if (ctx->divergent_vals[intrinsic->dest.ssa.index]) type = RegType::vgpr; else type = RegType::sgpr; break; default: for (unsigned i = 0; i < nir_intrinsic_infos[intrinsic->intrinsic].num_srcs; i++) { if (allocated[intrinsic->src[i].ssa->index].type() == RegType::vgpr) type = RegType::vgpr; } break; } allocated[intrinsic->dest.ssa.index] = Temp(0, RegClass(type, size)); switch(intrinsic->intrinsic) { case nir_intrinsic_load_barycentric_sample: case nir_intrinsic_load_barycentric_pixel: case nir_intrinsic_load_barycentric_centroid: case nir_intrinsic_load_barycentric_at_sample: case nir_intrinsic_load_barycentric_at_offset: { glsl_interp_mode mode = (glsl_interp_mode)nir_intrinsic_interp_mode(intrinsic); spi_ps_inputs |= get_interp_input(intrinsic->intrinsic, mode); break; } case nir_intrinsic_load_front_face: spi_ps_inputs |= S_0286CC_FRONT_FACE_ENA(1); break; case nir_intrinsic_load_frag_coord: case nir_intrinsic_load_sample_pos: { uint8_t mask = nir_ssa_def_components_read(&intrinsic->dest.ssa); for (unsigned i = 0; i < 4; i++) { if (mask & (1 << i)) spi_ps_inputs |= S_0286CC_POS_X_FLOAT_ENA(1) << i; } break; } case nir_intrinsic_load_sample_id: spi_ps_inputs |= S_0286CC_ANCILLARY_ENA(1); break; case nir_intrinsic_load_sample_mask_in: spi_ps_inputs |= S_0286CC_ANCILLARY_ENA(1); spi_ps_inputs |= S_0286CC_SAMPLE_COVERAGE_ENA(1); break; default: break; } break; } case nir_instr_type_tex: { nir_tex_instr* tex = nir_instr_as_tex(instr); unsigned size = tex->dest.ssa.num_components; if (tex->dest.ssa.bit_size == 64) size *= 2; if (tex->op == nir_texop_texture_samples) assert(!ctx->divergent_vals[tex->dest.ssa.index]); if (ctx->divergent_vals[tex->dest.ssa.index]) allocated[tex->dest.ssa.index] = Temp(0, RegClass(RegType::vgpr, size)); else allocated[tex->dest.ssa.index] = Temp(0, RegClass(RegType::sgpr, size)); break; } case nir_instr_type_parallel_copy: { nir_foreach_parallel_copy_entry(entry, nir_instr_as_parallel_copy(instr)) { allocated[entry->dest.ssa.index] = allocated[entry->src.ssa->index]; } break; } case nir_instr_type_ssa_undef: { unsigned size = nir_instr_as_ssa_undef(instr)->def.num_components; if (nir_instr_as_ssa_undef(instr)->def.bit_size == 64) size *= 2; allocated[nir_instr_as_ssa_undef(instr)->def.index] = Temp(0, RegClass(RegType::sgpr, size)); break; } case nir_instr_type_phi: { nir_phi_instr* phi = nir_instr_as_phi(instr); RegType type; unsigned size = phi->dest.ssa.num_components; if (phi->dest.ssa.bit_size == 1) { assert(size == 1 && "multiple components not yet supported on boolean phis."); type = RegType::sgpr; size *= 2; allocated[phi->dest.ssa.index] = Temp(0, RegClass(type, size)); break; } if (ctx->divergent_vals[phi->dest.ssa.index]) { type = RegType::vgpr; } else { type = RegType::sgpr; nir_foreach_phi_src (src, phi) { if (allocated[src->src.ssa->index].type() == RegType::vgpr) type = RegType::vgpr; if (allocated[src->src.ssa->index].type() == RegType::none) done = false; } } size *= phi->dest.ssa.bit_size == 64 ? 2 : 1; RegClass rc = RegClass(type, size); if (rc != allocated[phi->dest.ssa.index].regClass()) { done = false; } else { nir_foreach_phi_src(src, phi) assert(allocated[src->src.ssa->index].size() == rc.size()); } allocated[phi->dest.ssa.index] = Temp(0, rc); break; } default: break; } } } } if (G_0286CC_POS_W_FLOAT_ENA(spi_ps_inputs)) { /* If POS_W_FLOAT (11) is enabled, at least one of PERSP_* must be enabled too */ spi_ps_inputs |= S_0286CC_PERSP_CENTER_ENA(1); } if (!(spi_ps_inputs & 0x7F)) { /* At least one of PERSP_* (0xF) or LINEAR_* (0x70) must be enabled */ spi_ps_inputs |= S_0286CC_PERSP_CENTER_ENA(1); } ctx->program->config->spi_ps_input_ena = spi_ps_inputs; ctx->program->config->spi_ps_input_addr = spi_ps_inputs; for (unsigned i = 0; i < impl->ssa_alloc; i++) allocated[i] = Temp(ctx->program->allocateId(), allocated[i].regClass()); ctx->allocated.reset(allocated.release()); } Pseudo_instruction *add_startpgm(struct isel_context *ctx) { unsigned arg_count = ctx->args->ac.arg_count; if (ctx->stage == fragment_fs) { /* LLVM optimizes away unused FS inputs and computes spi_ps_input_addr * itself and then communicates the results back via the ELF binary. * Mirror what LLVM does by re-mapping the VGPR arguments here. * * TODO: If we made the FS input scanning code into a separate pass that * could run before argument setup, then this wouldn't be necessary * anymore. */ struct ac_shader_args *args = &ctx->args->ac; arg_count = 0; for (unsigned i = 0, vgpr_arg = 0, vgpr_reg = 0; i < args->arg_count; i++) { if (args->args[i].file != AC_ARG_VGPR) { arg_count++; continue; } if (!(ctx->program->config->spi_ps_input_addr & (1 << vgpr_arg))) { args->args[i].skip = true; } else { args->args[i].offset = vgpr_reg; vgpr_reg += args->args[i].size; arg_count++; } vgpr_arg++; } } aco_ptr startpgm{create_instruction(aco_opcode::p_startpgm, Format::PSEUDO, 0, arg_count + 1)}; for (unsigned i = 0, arg = 0; i < ctx->args->ac.arg_count; i++) { if (ctx->args->ac.args[i].skip) continue; enum ac_arg_regfile file = ctx->args->ac.args[i].file; unsigned size = ctx->args->ac.args[i].size; unsigned reg = ctx->args->ac.args[i].offset; RegClass type = RegClass(file == AC_ARG_SGPR ? RegType::sgpr : RegType::vgpr, size); Temp dst = Temp{ctx->program->allocateId(), type}; ctx->arg_temps[i] = dst; startpgm->definitions[arg] = Definition(dst); startpgm->definitions[arg].setFixed(PhysReg{file == AC_ARG_SGPR ? reg : reg + 256}); arg++; } startpgm->definitions[arg_count] = Definition{ctx->program->allocateId(), exec, s2}; Pseudo_instruction *instr = startpgm.get(); ctx->block->instructions.push_back(std::move(startpgm)); /* Stash these in the program so that they can be accessed later when * handling spilling. */ ctx->program->private_segment_buffer = get_arg(ctx, ctx->args->ring_offsets); ctx->program->scratch_offset = get_arg(ctx, ctx->args->scratch_offset); return instr; } int type_size(const struct glsl_type *type, bool bindless) { // TODO: don't we need type->std430_base_alignment() here? return glsl_count_attribute_slots(type, false); } void shared_var_info(const struct glsl_type *type, unsigned *size, unsigned *align) { assert(glsl_type_is_vector_or_scalar(type)); uint32_t comp_size = glsl_type_is_boolean(type) ? 4 : glsl_get_bit_size(type) / 8; unsigned length = glsl_get_vector_elements(type); *size = comp_size * length, *align = comp_size; } static bool mem_vectorize_callback(unsigned align, unsigned bit_size, unsigned num_components, unsigned high_offset, nir_intrinsic_instr *low, nir_intrinsic_instr *high) { if ((bit_size != 32 && bit_size != 64) || num_components > 4) return false; /* >128 bit loads are split except with SMEM */ if (bit_size * num_components > 128) return false; switch (low->intrinsic) { case nir_intrinsic_load_ubo: case nir_intrinsic_load_ssbo: case nir_intrinsic_store_ssbo: case nir_intrinsic_load_push_constant: return align % 4 == 0; case nir_intrinsic_load_deref: case nir_intrinsic_store_deref: assert(nir_src_as_deref(low->src[0])->mode == nir_var_mem_shared); /* fallthrough */ case nir_intrinsic_load_shared: case nir_intrinsic_store_shared: if (bit_size * num_components > 64) /* 96 and 128 bit loads require 128 bit alignment and are split otherwise */ return align % 16 == 0; else return align % 4 == 0; default: return false; } return false; } void setup_vs_variables(isel_context *ctx, nir_shader *nir) { nir_foreach_variable(variable, &nir->inputs) { variable->data.driver_location = variable->data.location * 4; } nir_foreach_variable(variable, &nir->outputs) { variable->data.driver_location = variable->data.location * 4; } radv_vs_output_info *outinfo = &ctx->program->info->vs.outinfo; memset(outinfo->vs_output_param_offset, AC_EXP_PARAM_UNDEFINED, sizeof(outinfo->vs_output_param_offset)); ctx->needs_instance_id = ctx->program->info->vs.needs_instance_id; bool export_clip_dists = ctx->options->key.vs_common_out.export_clip_dists; outinfo->param_exports = 0; int pos_written = 0x1; if (outinfo->writes_pointsize || outinfo->writes_viewport_index || outinfo->writes_layer) pos_written |= 1 << 1; nir_foreach_variable(variable, &nir->outputs) { int idx = variable->data.location; unsigned slots = variable->type->count_attribute_slots(false); if (variable->data.compact) { unsigned component_count = variable->data.location_frac + variable->type->length; slots = (component_count + 3) / 4; } if (idx >= VARYING_SLOT_VAR0 || idx == VARYING_SLOT_LAYER || idx == VARYING_SLOT_PRIMITIVE_ID || ((idx == VARYING_SLOT_CLIP_DIST0 || idx == VARYING_SLOT_CLIP_DIST1) && export_clip_dists)) { for (unsigned i = 0; i < slots; i++) { if (outinfo->vs_output_param_offset[idx + i] == AC_EXP_PARAM_UNDEFINED) outinfo->vs_output_param_offset[idx + i] = outinfo->param_exports++; } } } if (outinfo->writes_layer && outinfo->vs_output_param_offset[VARYING_SLOT_LAYER] == AC_EXP_PARAM_UNDEFINED) { /* when ctx->options->key.has_multiview_view_index = true, the layer * variable isn't declared in NIR and it's isel's job to get the layer */ outinfo->vs_output_param_offset[VARYING_SLOT_LAYER] = outinfo->param_exports++; } if (outinfo->export_prim_id) { assert(outinfo->vs_output_param_offset[VARYING_SLOT_PRIMITIVE_ID] == AC_EXP_PARAM_UNDEFINED); outinfo->vs_output_param_offset[VARYING_SLOT_PRIMITIVE_ID] = outinfo->param_exports++; } ctx->num_clip_distances = util_bitcount(outinfo->clip_dist_mask); ctx->num_cull_distances = util_bitcount(outinfo->cull_dist_mask); assert(ctx->num_clip_distances + ctx->num_cull_distances <= 8); if (ctx->num_clip_distances + ctx->num_cull_distances > 0) pos_written |= 1 << 2; if (ctx->num_clip_distances + ctx->num_cull_distances > 4) pos_written |= 1 << 3; outinfo->pos_exports = util_bitcount(pos_written); } void setup_variables(isel_context *ctx, nir_shader *nir) { switch (nir->info.stage) { case MESA_SHADER_FRAGMENT: { nir_foreach_variable(variable, &nir->outputs) { int idx = variable->data.location + variable->data.index; variable->data.driver_location = idx * 4; } break; } case MESA_SHADER_COMPUTE: { ctx->program->config->lds_size = (nir->info.cs.shared_size + ctx->program->lds_alloc_granule - 1) / ctx->program->lds_alloc_granule; break; } case MESA_SHADER_VERTEX: { setup_vs_variables(ctx, nir); break; } default: unreachable("Unhandled shader stage."); } } isel_context setup_isel_context(Program* program, unsigned shader_count, struct nir_shader *const *shaders, ac_shader_config* config, struct radv_shader_args *args) { program->stage = 0; for (unsigned i = 0; i < shader_count; i++) { switch (shaders[i]->info.stage) { case MESA_SHADER_VERTEX: program->stage |= sw_vs; break; case MESA_SHADER_TESS_CTRL: program->stage |= sw_tcs; break; case MESA_SHADER_TESS_EVAL: program->stage |= sw_tes; break; case MESA_SHADER_GEOMETRY: program->stage |= sw_gs; break; case MESA_SHADER_FRAGMENT: program->stage |= sw_fs; break; case MESA_SHADER_COMPUTE: program->stage |= sw_cs; break; default: unreachable("Shader stage not implemented"); } } if (program->stage == sw_vs) program->stage |= hw_vs; else if (program->stage == sw_fs) program->stage |= hw_fs; else if (program->stage == sw_cs) program->stage |= hw_cs; else unreachable("Shader stage not implemented"); program->config = config; program->info = args->shader_info; program->chip_class = args->options->chip_class; program->family = args->options->family; program->wave_size = args->shader_info->wave_size; program->lds_alloc_granule = args->options->chip_class >= GFX7 ? 512 : 256; program->lds_limit = args->options->chip_class >= GFX7 ? 65536 : 32768; program->vgpr_limit = 256; if (args->options->chip_class >= GFX10) { program->physical_sgprs = 2560; /* doesn't matter as long as it's at least 128 * 20 */ program->sgpr_alloc_granule = 127; program->sgpr_limit = 106; } else if (program->chip_class >= GFX8) { program->physical_sgprs = 800; program->sgpr_alloc_granule = 15; if (args->options->family == CHIP_TONGA || args->options->family == CHIP_ICELAND) program->sgpr_limit = 94; /* workaround hardware bug */ else program->sgpr_limit = 102; } else { program->physical_sgprs = 512; program->sgpr_alloc_granule = 7; program->sgpr_limit = 104; } /* TODO: we don't have to allocate VCC if we don't need it */ program->needs_vcc = true; isel_context ctx = {}; ctx.program = program; ctx.args = args; ctx.options = args->options; ctx.stage = program->stage; for (unsigned i = 0; i < shader_count; i++) { nir_shader *nir = shaders[i]; /* align and copy constant data */ while (program->constant_data.size() % 4u) program->constant_data.push_back(0); ctx.constant_data_offset = program->constant_data.size(); program->constant_data.insert(program->constant_data.end(), (uint8_t*)nir->constant_data, (uint8_t*)nir->constant_data + nir->constant_data_size); /* the variable setup has to be done before lower_io / CSE */ if (nir->info.stage == MESA_SHADER_COMPUTE) nir_lower_vars_to_explicit_types(nir, nir_var_mem_shared, shared_var_info); setup_variables(&ctx, nir); /* optimize and lower memory operations */ bool lower_to_scalar = false; bool lower_pack = false; if (nir_opt_load_store_vectorize(nir, (nir_variable_mode)(nir_var_mem_ssbo | nir_var_mem_ubo | nir_var_mem_push_const | nir_var_mem_shared), mem_vectorize_callback)) { lower_to_scalar = true; lower_pack = true; } if (nir->info.stage == MESA_SHADER_COMPUTE) lower_to_scalar |= nir_lower_explicit_io(nir, nir_var_mem_shared, nir_address_format_32bit_offset); else nir_lower_io(nir, (nir_variable_mode)(nir_var_shader_in | nir_var_shader_out), type_size, (nir_lower_io_options)0); nir_lower_explicit_io(nir, nir_var_mem_global, nir_address_format_64bit_global); if (lower_to_scalar) nir_lower_alu_to_scalar(nir, NULL, NULL); if (lower_pack) nir_lower_pack(nir); /* lower ALU operations */ // TODO: implement logic64 in aco, it's more effective for sgprs nir_lower_int64(nir, nir->options->lower_int64_options); nir_opt_idiv_const(nir, 32); nir_lower_idiv(nir, nir_lower_idiv_precise); /* optimize the lowered ALU operations */ bool more_algebraic = true; while (more_algebraic) { more_algebraic = false; NIR_PASS_V(nir, nir_copy_prop); NIR_PASS_V(nir, nir_opt_dce); NIR_PASS_V(nir, nir_opt_constant_folding); NIR_PASS(more_algebraic, nir, nir_opt_algebraic); } /* Do late algebraic optimization to turn add(a, neg(b)) back into * subs, then the mandatory cleanup after algebraic. Note that it may * produce fnegs, and if so then we need to keep running to squash * fneg(fneg(a)). */ bool more_late_algebraic = true; while (more_late_algebraic) { more_late_algebraic = false; NIR_PASS(more_late_algebraic, nir, nir_opt_algebraic_late); NIR_PASS_V(nir, nir_opt_constant_folding); NIR_PASS_V(nir, nir_copy_prop); NIR_PASS_V(nir, nir_opt_dce); NIR_PASS_V(nir, nir_opt_cse); } /* cleanup passes */ nir_lower_load_const_to_scalar(nir); nir_opt_shrink_load(nir); nir_move_options move_opts = (nir_move_options)( nir_move_const_undef | nir_move_load_ubo | nir_move_load_input | nir_move_comparisons); nir_opt_sink(nir, move_opts); nir_opt_move(nir, move_opts); nir_convert_to_lcssa(nir, true, false); nir_lower_phis_to_scalar(nir); nir_function_impl *func = nir_shader_get_entrypoint(nir); nir_index_ssa_defs(func); if (args->options->dump_preoptir) { fprintf(stderr, "NIR shader before instruction selection:\n"); nir_print_shader(nir, stderr); } } unsigned scratch_size = 0; for (unsigned i = 0; i < shader_count; i++) scratch_size = std::max(scratch_size, shaders[i]->scratch_size); ctx.program->config->scratch_bytes_per_wave = align(scratch_size * ctx.program->wave_size, 1024); ctx.block = ctx.program->create_and_insert_block(); ctx.block->loop_nest_depth = 0; ctx.block->kind = block_kind_top_level; return ctx; } }