/* * Copyright © 2016 Bas Nieuwenhuizen * * 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 "ac_nir.h" #include "sid.h" #include "nir_builder.h" #include "nir_xfb_info.h" /* Load argument with index start from arg plus relative_index. */ nir_ssa_def * ac_nir_load_arg_at_offset(nir_builder *b, const struct ac_shader_args *ac_args, struct ac_arg arg, unsigned relative_index) { unsigned arg_index = arg.arg_index + relative_index; unsigned num_components = ac_args->args[arg_index].size; if (ac_args->args[arg_index].file == AC_ARG_SGPR) return nir_load_scalar_arg_amd(b, num_components, .base = arg_index); else return nir_load_vector_arg_amd(b, num_components, .base = arg_index); } nir_ssa_def * ac_nir_unpack_arg(nir_builder *b, const struct ac_shader_args *ac_args, struct ac_arg arg, unsigned rshift, unsigned bitwidth) { nir_ssa_def *value = ac_nir_load_arg(b, ac_args, arg); return nir_ubfe_imm(b, value, rshift, bitwidth); } static bool is_sin_cos(const nir_instr *instr, UNUSED const void *_) { return instr->type == nir_instr_type_alu && (nir_instr_as_alu(instr)->op == nir_op_fsin || nir_instr_as_alu(instr)->op == nir_op_fcos); } static nir_ssa_def * lower_sin_cos(struct nir_builder *b, nir_instr *instr, UNUSED void *_) { nir_alu_instr *sincos = nir_instr_as_alu(instr); nir_ssa_def *src = nir_fmul_imm(b, nir_ssa_for_alu_src(b, sincos, 0), 0.15915493667125702); return sincos->op == nir_op_fsin ? nir_fsin_amd(b, src) : nir_fcos_amd(b, src); } bool ac_nir_lower_sin_cos(nir_shader *shader) { return nir_shader_lower_instructions(shader, is_sin_cos, lower_sin_cos, NULL); } void ac_nir_store_var_components(nir_builder *b, nir_variable *var, nir_ssa_def *value, unsigned component, unsigned writemask) { /* component store */ if (value->num_components != 4) { nir_ssa_def *undef = nir_ssa_undef(b, 1, value->bit_size); /* add undef component before and after value to form a vec4 */ nir_ssa_def *comp[4]; for (int i = 0; i < 4; i++) { comp[i] = (i >= component && i < component + value->num_components) ? nir_channel(b, value, i - component) : undef; } value = nir_vec(b, comp, 4); writemask <<= component; } else { /* if num_component==4, there should be no component offset */ assert(component == 0); } nir_store_var(b, var, value, writemask); } void ac_nir_export_primitive(nir_builder *b, nir_ssa_def *prim) { unsigned write_mask = BITFIELD_MASK(prim->num_components); nir_export_amd(b, nir_pad_vec4(b, prim), .base = V_008DFC_SQ_EXP_PRIM, .flags = AC_EXP_FLAG_DONE, .write_mask = write_mask); } static nir_ssa_def * get_export_output(nir_builder *b, nir_ssa_def **output) { nir_ssa_def *vec[4]; for (int i = 0; i < 4; i++) { if (output[i]) vec[i] = nir_u2uN(b, output[i], 32); else vec[i] = nir_ssa_undef(b, 1, 32); } return nir_vec(b, vec, 4); } void ac_nir_export_position(nir_builder *b, enum amd_gfx_level gfx_level, uint32_t clip_cull_mask, bool no_param_export, bool force_vrs, uint64_t outputs_written, nir_ssa_def *(*outputs)[4]) { nir_intrinsic_instr *exp[4]; unsigned exp_num = 0; nir_ssa_def *pos; if (outputs_written & VARYING_BIT_POS) { pos = get_export_output(b, outputs[VARYING_SLOT_POS]); } else { nir_ssa_def *zero = nir_imm_float(b, 0); nir_ssa_def *one = nir_imm_float(b, 1); pos = nir_vec4(b, zero, zero, zero, one); } /* GFX10 (Navi1x) skip POS0 exports if EXEC=0 and DONE=0, causing a hang. * Setting valid_mask=1 prevents it and has no other effect. */ unsigned pos_flags = gfx_level == GFX10 ? AC_EXP_FLAG_VALID_MASK : 0; exp[exp_num] = nir_export_amd( b, pos, .base = V_008DFC_SQ_EXP_POS + exp_num, .flags = pos_flags, .write_mask = 0xf); exp_num++; uint64_t mask = VARYING_BIT_PSIZ | VARYING_BIT_EDGE | VARYING_BIT_LAYER | VARYING_BIT_VIEWPORT | VARYING_BIT_PRIMITIVE_SHADING_RATE; /* clear output mask if no one written */ if (!outputs[VARYING_SLOT_PSIZ][0]) outputs_written &= ~VARYING_BIT_PSIZ; if (!outputs[VARYING_SLOT_EDGE][0]) outputs_written &= ~VARYING_BIT_EDGE; if (!outputs[VARYING_SLOT_PRIMITIVE_SHADING_RATE][0]) outputs_written &= ~VARYING_BIT_PRIMITIVE_SHADING_RATE; if (!outputs[VARYING_SLOT_LAYER][0]) outputs_written &= ~VARYING_BIT_LAYER; if (!outputs[VARYING_SLOT_VIEWPORT][0]) outputs_written &= ~VARYING_BIT_VIEWPORT; if ((outputs_written & mask) || force_vrs) { nir_ssa_def *zero = nir_imm_float(b, 0); nir_ssa_def *vec[4] = { zero, zero, zero, zero }; unsigned flags = 0; unsigned write_mask = 0; if (outputs_written & VARYING_BIT_PSIZ) { vec[0] = outputs[VARYING_SLOT_PSIZ][0]; write_mask |= BITFIELD_BIT(0); } if (outputs_written & VARYING_BIT_EDGE) { vec[1] = nir_umin(b, outputs[VARYING_SLOT_EDGE][0], nir_imm_int(b, 1)); write_mask |= BITFIELD_BIT(1); } nir_ssa_def *rates = NULL; if (outputs_written & VARYING_BIT_PRIMITIVE_SHADING_RATE) { rates = outputs[VARYING_SLOT_PRIMITIVE_SHADING_RATE][0]; } else if (force_vrs) { /* If Pos.W != 1 (typical for non-GUI elements), use coarse shading. */ nir_ssa_def *pos_w = nir_channel(b, pos, 3); nir_ssa_def *cond = nir_fneu(b, pos_w, nir_imm_float(b, 1)); rates = nir_bcsel(b, cond, nir_load_force_vrs_rates_amd(b), nir_imm_int(b, 0)); } if (rates) { vec[1] = nir_ior(b, vec[1], rates); write_mask |= BITFIELD_BIT(1); } if (outputs_written & VARYING_BIT_LAYER) { vec[2] = outputs[VARYING_SLOT_LAYER][0]; write_mask |= BITFIELD_BIT(2); } if (outputs_written & VARYING_BIT_VIEWPORT) { if (gfx_level >= GFX9) { /* GFX9 has the layer in [10:0] and the viewport index in [19:16]. */ nir_ssa_def *v = nir_ishl_imm(b, outputs[VARYING_SLOT_VIEWPORT][0], 16); vec[2] = nir_ior(b, vec[2], v); write_mask |= BITFIELD_BIT(2); } else { vec[3] = outputs[VARYING_SLOT_VIEWPORT][0]; write_mask |= BITFIELD_BIT(3); } } exp[exp_num] = nir_export_amd( b, nir_vec(b, vec, 4), .base = V_008DFC_SQ_EXP_POS + exp_num, .flags = flags, .write_mask = write_mask); exp_num++; } for (int i = 0; i < 2; i++) { if ((outputs_written & (VARYING_BIT_CLIP_DIST0 << i)) && (clip_cull_mask & BITFIELD_RANGE(i * 4, 4))) { exp[exp_num] = nir_export_amd( b, get_export_output(b, outputs[VARYING_SLOT_CLIP_DIST0 + i]), .base = V_008DFC_SQ_EXP_POS + exp_num, .write_mask = (clip_cull_mask >> (i * 4)) & 0xf); exp_num++; } } if (outputs_written & VARYING_BIT_CLIP_VERTEX) { nir_ssa_def *vtx = get_export_output(b, outputs[VARYING_SLOT_CLIP_VERTEX]); /* Clip distance for clip vertex to each user clip plane. */ nir_ssa_def *clip_dist[8] = {0}; u_foreach_bit (i, clip_cull_mask) { nir_ssa_def *ucp = nir_load_user_clip_plane(b, .ucp_id = i); clip_dist[i] = nir_fdot4(b, vtx, ucp); } for (int i = 0; i < 2; i++) { if (clip_cull_mask & BITFIELD_RANGE(i * 4, 4)) { exp[exp_num] = nir_export_amd( b, get_export_output(b, clip_dist + i * 4), .base = V_008DFC_SQ_EXP_POS + exp_num, .write_mask = (clip_cull_mask >> (i * 4)) & 0xf); exp_num++; } } } /* Specify that this is the last export */ nir_intrinsic_instr *final_exp = exp[exp_num - 1]; unsigned final_exp_flags = nir_intrinsic_flags(final_exp); nir_intrinsic_set_flags(final_exp, final_exp_flags | AC_EXP_FLAG_DONE); /* If a shader has no param exports, rasterization can start before * the shader finishes and thus memory stores might not finish before * the pixel shader starts. */ if (gfx_level >= GFX10 && no_param_export && b->shader->info.writes_memory) { nir_intrinsic_instr *wait_instr = nir_intrinsic_instr_create(b->shader, nir_intrinsic_memory_barrier_buffer); nir_instr_insert_before(&final_exp->instr, &wait_instr->instr); } } void ac_nir_export_parameters(nir_builder *b, const uint8_t *param_offsets, uint64_t outputs_written, uint16_t outputs_written_16bit, nir_ssa_def *(*outputs)[4], nir_ssa_def *(*outputs_16bit_lo)[4], nir_ssa_def *(*outputs_16bit_hi)[4]) { uint32_t exported_params = 0; u_foreach_bit64 (slot, outputs_written) { unsigned offset = param_offsets[slot]; if (offset > AC_EXP_PARAM_OFFSET_31) continue; uint32_t write_mask = 0; for (int i = 0; i < 4; i++) { if (outputs[slot][i]) write_mask |= BITFIELD_BIT(i); } /* no one set this output slot, we can skip the param export */ if (!write_mask) continue; /* Since param_offsets[] can map multiple varying slots to the same * param export index (that's radeonsi-specific behavior), we need to * do this so as not to emit duplicated exports. */ if (exported_params & BITFIELD_BIT(offset)) continue; nir_export_amd( b, get_export_output(b, outputs[slot]), .base = V_008DFC_SQ_EXP_PARAM + offset, .write_mask = write_mask); exported_params |= BITFIELD_BIT(offset); } u_foreach_bit (slot, outputs_written_16bit) { unsigned offset = param_offsets[VARYING_SLOT_VAR0_16BIT + slot]; if (offset > AC_EXP_PARAM_OFFSET_31) continue; uint32_t write_mask = 0; for (int i = 0; i < 4; i++) { if (outputs_16bit_lo[slot][i] || outputs_16bit_hi[slot][i]) write_mask |= BITFIELD_BIT(i); } /* no one set this output slot, we can skip the param export */ if (!write_mask) continue; /* Since param_offsets[] can map multiple varying slots to the same * param export index (that's radeonsi-specific behavior), we need to * do this so as not to emit duplicated exports. */ if (exported_params & BITFIELD_BIT(offset)) continue; nir_ssa_def *vec[4]; nir_ssa_def *undef = nir_ssa_undef(b, 1, 16); for (int i = 0; i < 4; i++) { nir_ssa_def *lo = outputs_16bit_lo[slot][i] ? outputs_16bit_lo[slot][i] : undef; nir_ssa_def *hi = outputs_16bit_hi[slot][i] ? outputs_16bit_hi[slot][i] : undef; vec[i] = nir_pack_32_2x16_split(b, lo, hi); } nir_export_amd( b, nir_vec(b, vec, 4), .base = V_008DFC_SQ_EXP_PARAM + offset, .write_mask = write_mask); exported_params |= BITFIELD_BIT(offset); } } /** * This function takes an I/O intrinsic like load/store_input, * and emits a sequence that calculates the full offset of that instruction, * including a stride to the base and component offsets. */ nir_ssa_def * ac_nir_calc_io_offset(nir_builder *b, nir_intrinsic_instr *intrin, nir_ssa_def *base_stride, unsigned component_stride, ac_nir_map_io_driver_location map_io) { unsigned base = nir_intrinsic_base(intrin); unsigned semantic = nir_intrinsic_io_semantics(intrin).location; unsigned mapped_driver_location = map_io ? map_io(semantic) : base; /* base is the driver_location, which is in slots (1 slot = 4x4 bytes) */ nir_ssa_def *base_op = nir_imul_imm(b, base_stride, mapped_driver_location); /* offset should be interpreted in relation to the base, * so the instruction effectively reads/writes another input/output * when it has an offset */ nir_ssa_def *offset_op = nir_imul(b, base_stride, nir_ssa_for_src(b, *nir_get_io_offset_src(intrin), 1)); /* component is in bytes */ unsigned const_op = nir_intrinsic_component(intrin) * component_stride; return nir_iadd_imm_nuw(b, nir_iadd_nuw(b, base_op, offset_op), const_op); } bool ac_nir_lower_indirect_derefs(nir_shader *shader, enum amd_gfx_level gfx_level) { bool progress = false; /* Lower large variables to scratch first so that we won't bloat the * shader by generating large if ladders for them. We later lower * scratch to alloca's, assuming LLVM won't generate VGPR indexing. */ NIR_PASS(progress, shader, nir_lower_vars_to_scratch, nir_var_function_temp, 256, glsl_get_natural_size_align_bytes); /* LLVM doesn't support VGPR indexing on GFX9. */ bool llvm_has_working_vgpr_indexing = gfx_level != GFX9; /* TODO: Indirect indexing of GS inputs is unimplemented. * * TCS and TES load inputs directly from LDS or offchip memory, so * indirect indexing is trivial. */ nir_variable_mode indirect_mask = 0; if (shader->info.stage == MESA_SHADER_GEOMETRY || (shader->info.stage != MESA_SHADER_TESS_CTRL && shader->info.stage != MESA_SHADER_TESS_EVAL && !llvm_has_working_vgpr_indexing)) { indirect_mask |= nir_var_shader_in; } if (!llvm_has_working_vgpr_indexing && shader->info.stage != MESA_SHADER_TESS_CTRL) indirect_mask |= nir_var_shader_out; /* TODO: We shouldn't need to do this, however LLVM isn't currently * smart enough to handle indirects without causing excess spilling * causing the gpu to hang. * * See the following thread for more details of the problem: * https://lists.freedesktop.org/archives/mesa-dev/2017-July/162106.html */ indirect_mask |= nir_var_function_temp; NIR_PASS(progress, shader, nir_lower_indirect_derefs, indirect_mask, UINT32_MAX); return progress; } struct shader_outputs { nir_ssa_def *data[VARYING_SLOT_MAX][4]; nir_ssa_def *data_16bit_lo[16][4]; nir_ssa_def *data_16bit_hi[16][4]; nir_alu_type (*type_16bit_lo)[4]; nir_alu_type (*type_16bit_hi)[4]; }; static nir_ssa_def ** get_output_and_type(struct shader_outputs *outputs, unsigned slot, bool high_16bits, nir_alu_type **types) { nir_ssa_def **data; nir_alu_type *type; /* Only VARYING_SLOT_VARn_16BIT slots need output type to convert 16bit output * to 32bit. Vulkan is not allowed to streamout output less than 32bit. */ if (slot < VARYING_SLOT_VAR0_16BIT) { data = outputs->data[slot]; type = NULL; } else { unsigned index = slot - VARYING_SLOT_VAR0_16BIT; if (high_16bits) { data = outputs->data_16bit_hi[index]; type = outputs->type_16bit_hi[index]; } else { data = outputs->data_16bit_lo[index]; type = outputs->type_16bit_lo[index]; } } *types = type; return data; } static void emit_streamout(nir_builder *b, unsigned stream, nir_xfb_info *info, struct shader_outputs *outputs) { nir_ssa_def *so_vtx_count = nir_ubfe_imm(b, nir_load_streamout_config_amd(b), 16, 7); nir_ssa_def *tid = nir_load_subgroup_invocation(b); nir_push_if(b, nir_ilt(b, tid, so_vtx_count)); nir_ssa_def *so_write_index = nir_load_streamout_write_index_amd(b); nir_ssa_def *so_buffers[NIR_MAX_XFB_BUFFERS]; nir_ssa_def *so_write_offset[NIR_MAX_XFB_BUFFERS]; u_foreach_bit(i, info->buffers_written) { so_buffers[i] = nir_load_streamout_buffer_amd(b, i); unsigned stride = info->buffers[i].stride; nir_ssa_def *offset = nir_load_streamout_offset_amd(b, i); offset = nir_iadd(b, nir_imul_imm(b, nir_iadd(b, so_write_index, tid), stride), nir_imul_imm(b, offset, 4)); so_write_offset[i] = offset; } nir_ssa_def *undef = nir_ssa_undef(b, 1, 32); for (unsigned i = 0; i < info->output_count; i++) { const nir_xfb_output_info *output = info->outputs + i; if (stream != info->buffer_to_stream[output->buffer]) continue; nir_alu_type *output_type; nir_ssa_def **output_data = get_output_and_type(outputs, output->location, output->high_16bits, &output_type); nir_ssa_def *vec[4] = {undef, undef, undef, undef}; uint8_t mask = 0; u_foreach_bit(j, output->component_mask) { nir_ssa_def *data = output_data[j]; if (data) { if (data->bit_size < 32) { /* we need output type to convert non-32bit output to 32bit */ assert(output_type); nir_alu_type base_type = nir_alu_type_get_base_type(output_type[j]); data = nir_convert_to_bit_size(b, data, base_type, 32); } unsigned comp = j - output->component_offset; vec[comp] = data; mask |= 1 << comp; } } if (!mask) continue; unsigned buffer = output->buffer; nir_ssa_def *data = nir_vec(b, vec, util_last_bit(mask)); nir_ssa_def *zero = nir_imm_int(b, 0); nir_store_buffer_amd(b, data, so_buffers[buffer], so_write_offset[buffer], zero, zero, .base = output->offset, .write_mask = mask, .access = ACCESS_COHERENT | ACCESS_STREAM_CACHE_POLICY); } nir_pop_if(b, NULL); } nir_shader * ac_nir_create_gs_copy_shader(const nir_shader *gs_nir, enum amd_gfx_level gfx_level, uint32_t clip_cull_mask, const uint8_t *param_offsets, bool has_param_exports, bool disable_streamout, bool kill_pointsize, bool force_vrs, ac_nir_gs_output_info *output_info) { nir_builder b = nir_builder_init_simple_shader( MESA_SHADER_VERTEX, gs_nir->options, "gs_copy"); nir_foreach_shader_out_variable(var, gs_nir) nir_shader_add_variable(b.shader, nir_variable_clone(var, b.shader)); b.shader->info.outputs_written = gs_nir->info.outputs_written; b.shader->info.outputs_written_16bit = gs_nir->info.outputs_written_16bit; nir_ssa_def *gsvs_ring = nir_load_ring_gsvs_amd(&b); nir_xfb_info *info = gs_nir->xfb_info; nir_ssa_def *stream_id = NULL; if (!disable_streamout && info) stream_id = nir_ubfe_imm(&b, nir_load_streamout_config_amd(&b), 24, 2); nir_ssa_def *vtx_offset = nir_imul_imm(&b, nir_load_vertex_id_zero_base(&b), 4); nir_ssa_def *zero = nir_imm_zero(&b, 1, 32); for (unsigned stream = 0; stream < 4; stream++) { if (stream > 0 && (!stream_id || !(info->streams_written & BITFIELD_BIT(stream)))) continue; if (stream_id) nir_push_if(&b, nir_ieq_imm(&b, stream_id, stream)); uint32_t offset = 0; struct shader_outputs outputs = { .type_16bit_lo = output_info->types_16bit_lo, .type_16bit_hi = output_info->types_16bit_hi, }; u_foreach_bit64 (i, gs_nir->info.outputs_written) { u_foreach_bit (j, output_info->usage_mask[i]) { if (((output_info->streams[i] >> (j * 2)) & 0x3) != stream) continue; outputs.data[i][j] = nir_load_buffer_amd(&b, 1, 32, gsvs_ring, vtx_offset, zero, zero, .base = offset, .access = ACCESS_COHERENT | ACCESS_STREAM_CACHE_POLICY); /* clamp legacy color output */ if (i == VARYING_SLOT_COL0 || i == VARYING_SLOT_COL1 || i == VARYING_SLOT_BFC0 || i == VARYING_SLOT_BFC0) { nir_ssa_def *color = outputs.data[i][j]; nir_ssa_def *clamp = nir_load_clamp_vertex_color_amd(&b); outputs.data[i][j] = nir_bcsel(&b, clamp, nir_fsat(&b, color), color); } offset += gs_nir->info.gs.vertices_out * 16 * 4; } } u_foreach_bit (i, gs_nir->info.outputs_written_16bit) { for (unsigned j = 0; j < 4; j++) { bool has_lo_16bit = (output_info->usage_mask_16bit_lo[i] & (1 << j)) && ((output_info->streams_16bit_lo[i] >> (j * 2)) & 0x3) == stream; bool has_hi_16bit = (output_info->usage_mask_16bit_hi[i] & (1 << j)) && ((output_info->streams_16bit_hi[i] >> (j * 2)) & 0x3) == stream; if (!has_lo_16bit && !has_hi_16bit) continue; nir_ssa_def *data = nir_load_buffer_amd(&b, 1, 32, gsvs_ring, vtx_offset, zero, zero, .base = offset, .access = ACCESS_COHERENT | ACCESS_STREAM_CACHE_POLICY); if (has_lo_16bit) outputs.data_16bit_lo[i][j] = nir_unpack_32_2x16_split_x(&b, data); if (has_hi_16bit) outputs.data_16bit_hi[i][j] = nir_unpack_32_2x16_split_y(&b, data); offset += gs_nir->info.gs.vertices_out * 16 * 4; } } if (stream_id) emit_streamout(&b, stream, info, &outputs); if (stream == 0) { uint64_t export_outputs = b.shader->info.outputs_written; if (kill_pointsize) export_outputs &= ~VARYING_BIT_PSIZ; ac_nir_export_position(&b, gfx_level, clip_cull_mask, !has_param_exports, force_vrs, export_outputs, outputs.data); if (has_param_exports) { ac_nir_export_parameters(&b, param_offsets, b.shader->info.outputs_written, b.shader->info.outputs_written_16bit, outputs.data, outputs.data_16bit_lo, outputs.data_16bit_hi); } } if (stream_id) nir_push_else(&b, NULL); } b.shader->info.clip_distance_array_size = gs_nir->info.clip_distance_array_size; b.shader->info.cull_distance_array_size = gs_nir->info.cull_distance_array_size; return b.shader; } static void gather_outputs(nir_builder *b, nir_function_impl *impl, struct shader_outputs *outputs) { /* Assume: * - the shader used nir_lower_io_to_temporaries * - 64-bit outputs are lowered * - no indirect indexing is present */ nir_foreach_block (block, impl) { nir_foreach_instr_safe (instr, block) { if (instr->type != nir_instr_type_intrinsic) continue; nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr); if (intrin->intrinsic != nir_intrinsic_store_output) continue; assert(nir_src_is_const(intrin->src[1]) && !nir_src_as_uint(intrin->src[1])); nir_alu_type type = nir_intrinsic_src_type(intrin); nir_io_semantics sem = nir_intrinsic_io_semantics(intrin); nir_alu_type *output_type; nir_ssa_def **output_data = get_output_and_type(outputs, sem.location, sem.high_16bits, &output_type); u_foreach_bit (i, nir_intrinsic_write_mask(intrin)) { unsigned comp = nir_intrinsic_component(intrin) + i; output_data[comp] = nir_channel(b, intrin->src[0].ssa, i); if (output_type) output_type[comp] = type; } /* remove all store output instruction */ nir_instr_remove(instr); } } } void ac_nir_lower_legacy_vs(nir_shader *nir, enum amd_gfx_level gfx_level, uint32_t clip_cull_mask, const uint8_t *param_offsets, bool has_param_exports, bool export_primitive_id, bool disable_streamout, bool kill_pointsize, bool force_vrs) { nir_function_impl *impl = nir_shader_get_entrypoint(nir); nir_metadata preserved = nir_metadata_block_index | nir_metadata_dominance; nir_builder b; nir_builder_init(&b, impl); b.cursor = nir_after_cf_list(&impl->body); nir_alu_type output_types_16bit_lo[16][4]; nir_alu_type output_types_16bit_hi[16][4]; struct shader_outputs outputs = { .type_16bit_lo = output_types_16bit_lo, .type_16bit_hi = output_types_16bit_hi, }; gather_outputs(&b, impl, &outputs); if (export_primitive_id) { /* When the primitive ID is read by FS, we must ensure that it's exported by the previous * vertex stage because it's implicit for VS or TES (but required by the Vulkan spec for GS * or MS). */ outputs.data[VARYING_SLOT_PRIMITIVE_ID][0] = nir_load_primitive_id(&b); /* Update outputs_written to reflect that the pass added a new output. */ nir->info.outputs_written |= BITFIELD64_BIT(VARYING_SLOT_PRIMITIVE_ID); } if (!disable_streamout && nir->xfb_info) { emit_streamout(&b, 0, nir->xfb_info, &outputs); preserved = nir_metadata_none; } uint64_t export_outputs = nir->info.outputs_written; if (kill_pointsize) export_outputs &= ~VARYING_BIT_PSIZ; ac_nir_export_position(&b, gfx_level, clip_cull_mask, !has_param_exports, force_vrs, export_outputs, outputs.data); if (has_param_exports) { ac_nir_export_parameters(&b, param_offsets, nir->info.outputs_written, nir->info.outputs_written_16bit, outputs.data, outputs.data_16bit_lo, outputs.data_16bit_hi); } nir_metadata_preserve(impl, preserved); } bool ac_nir_gs_shader_query(nir_builder *b, bool has_gen_prim_query, bool has_pipeline_stats_query, unsigned num_vertices_per_primitive, unsigned wave_size, nir_ssa_def *vertex_count[4], nir_ssa_def *primitive_count[4]) { nir_ssa_def *pipeline_query_enabled = NULL; nir_ssa_def *prim_gen_query_enabled = NULL; nir_ssa_def *shader_query_enabled = NULL; if (has_gen_prim_query) { prim_gen_query_enabled = nir_load_prim_gen_query_enabled_amd(b); if (has_pipeline_stats_query) { pipeline_query_enabled = nir_load_pipeline_stat_query_enabled_amd(b); shader_query_enabled = nir_ior(b, pipeline_query_enabled, prim_gen_query_enabled); } else { shader_query_enabled = prim_gen_query_enabled; } } else if (has_pipeline_stats_query) { pipeline_query_enabled = nir_load_pipeline_stat_query_enabled_amd(b); shader_query_enabled = pipeline_query_enabled; } else { /* has no query */ return false; } nir_if *if_shader_query = nir_push_if(b, shader_query_enabled); nir_ssa_def *active_threads_mask = nir_ballot(b, 1, wave_size, nir_imm_bool(b, true)); nir_ssa_def *num_active_threads = nir_bit_count(b, active_threads_mask); /* Calculate the "real" number of emitted primitives from the emitted GS vertices and primitives. * GS emits points, line strips or triangle strips. * Real primitives are points, lines or triangles. */ nir_ssa_def *num_prims_in_wave[4] = {0}; u_foreach_bit (i, b->shader->info.gs.active_stream_mask) { assert(vertex_count[i] && primitive_count[i]); nir_ssa_scalar vtx_cnt = nir_get_ssa_scalar(vertex_count[i], 0); nir_ssa_scalar prm_cnt = nir_get_ssa_scalar(primitive_count[i], 0); if (nir_ssa_scalar_is_const(vtx_cnt) && nir_ssa_scalar_is_const(prm_cnt)) { unsigned gs_vtx_cnt = nir_ssa_scalar_as_uint(vtx_cnt); unsigned gs_prm_cnt = nir_ssa_scalar_as_uint(prm_cnt); unsigned total_prm_cnt = gs_vtx_cnt - gs_prm_cnt * (num_vertices_per_primitive - 1u); if (total_prm_cnt == 0) continue; num_prims_in_wave[i] = nir_imul_imm(b, num_active_threads, total_prm_cnt); } else { nir_ssa_def *gs_vtx_cnt = vtx_cnt.def; nir_ssa_def *gs_prm_cnt = prm_cnt.def; if (num_vertices_per_primitive > 1) gs_prm_cnt = nir_iadd(b, nir_imul_imm(b, gs_prm_cnt, -1u * (num_vertices_per_primitive - 1)), gs_vtx_cnt); num_prims_in_wave[i] = nir_reduce(b, gs_prm_cnt, .reduction_op = nir_op_iadd); } } /* Store the query result to query result using an atomic add. */ nir_if *if_first_lane = nir_push_if(b, nir_elect(b, 1)); { if (has_pipeline_stats_query) { nir_if *if_pipeline_query = nir_push_if(b, pipeline_query_enabled); { nir_ssa_def *count = NULL; /* Add all streams' number to the same counter. */ for (int i = 0; i < 4; i++) { if (num_prims_in_wave[i]) { if (count) count = nir_iadd(b, count, num_prims_in_wave[i]); else count = num_prims_in_wave[i]; } } if (count) nir_atomic_add_gs_emit_prim_count_amd(b, count); nir_atomic_add_gs_invocation_count_amd(b, num_active_threads); } nir_pop_if(b, if_pipeline_query); } if (has_gen_prim_query) { nir_if *if_prim_gen_query = nir_push_if(b, prim_gen_query_enabled); { /* Add to the counter for this stream. */ for (int i = 0; i < 4; i++) { if (num_prims_in_wave[i]) nir_atomic_add_gen_prim_count_amd(b, num_prims_in_wave[i], .stream_id = i); } } nir_pop_if(b, if_prim_gen_query); } } nir_pop_if(b, if_first_lane); nir_pop_if(b, if_shader_query); return true; } typedef struct { nir_ssa_def *outputs[64][4]; nir_ssa_def *outputs_16bit_lo[16][4]; nir_ssa_def *outputs_16bit_hi[16][4]; ac_nir_gs_output_info *info; nir_ssa_def *vertex_count[4]; nir_ssa_def *primitive_count[4]; } lower_legacy_gs_state; static bool lower_legacy_gs_store_output(nir_builder *b, nir_intrinsic_instr *intrin, lower_legacy_gs_state *s) { /* Assume: * - the shader used nir_lower_io_to_temporaries * - 64-bit outputs are lowered * - no indirect indexing is present */ assert(nir_src_is_const(intrin->src[1]) && !nir_src_as_uint(intrin->src[1])); b->cursor = nir_before_instr(&intrin->instr); unsigned component = nir_intrinsic_component(intrin); unsigned write_mask = nir_intrinsic_write_mask(intrin); nir_io_semantics sem = nir_intrinsic_io_semantics(intrin); nir_ssa_def **outputs; if (sem.location < VARYING_SLOT_VAR0_16BIT) { outputs = s->outputs[sem.location]; } else { unsigned index = sem.location - VARYING_SLOT_VAR0_16BIT; if (sem.high_16bits) outputs = s->outputs_16bit_hi[index]; else outputs = s->outputs_16bit_lo[index]; } nir_ssa_def *store_val = intrin->src[0].ssa; /* 64bit output has been lowered to 32bit */ assert(store_val->bit_size <= 32); u_foreach_bit (i, write_mask) { unsigned comp = component + i; outputs[comp] = nir_channel(b, store_val, i); } nir_instr_remove(&intrin->instr); return true; } static bool lower_legacy_gs_emit_vertex_with_counter(nir_builder *b, nir_intrinsic_instr *intrin, lower_legacy_gs_state *s) { b->cursor = nir_before_instr(&intrin->instr); unsigned stream = nir_intrinsic_stream_id(intrin); nir_ssa_def *vtxidx = intrin->src[0].ssa; nir_ssa_def *gsvs_ring = nir_load_ring_gsvs_amd(b, .stream_id = stream); nir_ssa_def *soffset = nir_load_ring_gs2vs_offset_amd(b); unsigned offset = 0; u_foreach_bit64 (i, b->shader->info.outputs_written) { for (unsigned j = 0; j < 4; j++) { nir_ssa_def *output = s->outputs[i][j]; /* Next vertex emit need a new value, reset all outputs. */ s->outputs[i][j] = NULL; if (!(s->info->usage_mask[i] & (1 << j)) || ((s->info->streams[i] >> (j * 2)) & 0x3) != stream) continue; unsigned base = offset * b->shader->info.gs.vertices_out * 4; offset++; /* no one set this output, skip the buffer store */ if (!output) continue; nir_ssa_def *voffset = nir_ishl_imm(b, vtxidx, 2); /* extend 8/16 bit to 32 bit, 64 bit has been lowered */ nir_ssa_def *data = nir_u2uN(b, output, 32); nir_store_buffer_amd(b, data, gsvs_ring, voffset, soffset, nir_imm_int(b, 0), .access = ACCESS_COHERENT | ACCESS_STREAM_CACHE_POLICY | ACCESS_IS_SWIZZLED_AMD, .base = base, /* For ACO to not reorder this store around EmitVertex/EndPrimitve */ .memory_modes = nir_var_shader_out); } } u_foreach_bit (i, b->shader->info.outputs_written_16bit) { for (unsigned j = 0; j < 4; j++) { nir_ssa_def *output_lo = s->outputs_16bit_lo[i][j]; nir_ssa_def *output_hi = s->outputs_16bit_hi[i][j]; /* Next vertex emit need a new value, reset all outputs. */ s->outputs_16bit_lo[i][j] = NULL; s->outputs_16bit_hi[i][j] = NULL; bool has_lo_16bit = (s->info->usage_mask_16bit_lo[i] & (1 << j)) && ((s->info->streams_16bit_lo[i] >> (j * 2)) & 0x3) == stream; bool has_hi_16bit = (s->info->usage_mask_16bit_hi[i] & (1 << j)) && ((s->info->streams_16bit_hi[i] >> (j * 2)) & 0x3) == stream; if (!has_lo_16bit && !has_hi_16bit) continue; unsigned base = offset * b->shader->info.gs.vertices_out; offset++; bool has_lo_16bit_out = has_lo_16bit && output_lo; bool has_hi_16bit_out = has_hi_16bit && output_hi; /* no one set needed output, skip the buffer store */ if (!has_lo_16bit_out && !has_hi_16bit_out) continue; if (!has_lo_16bit_out) output_lo = nir_ssa_undef(b, 1, 16); if (!has_hi_16bit_out) output_hi = nir_ssa_undef(b, 1, 16); nir_ssa_def *voffset = nir_iadd_imm(b, vtxidx, base); voffset = nir_ishl_imm(b, voffset, 2); nir_store_buffer_amd(b, nir_pack_32_2x16_split(b, output_lo, output_hi), gsvs_ring, voffset, soffset, nir_imm_int(b, 0), .access = ACCESS_COHERENT | ACCESS_STREAM_CACHE_POLICY | ACCESS_IS_SWIZZLED_AMD, /* For ACO to not reorder this store around EmitVertex/EndPrimitve */ .memory_modes = nir_var_shader_out); } } /* Keep this instruction to signal vertex emission. */ return true; } static bool lower_legacy_gs_set_vertex_and_primitive_count(nir_builder *b, nir_intrinsic_instr *intrin, lower_legacy_gs_state *s) { b->cursor = nir_before_instr(&intrin->instr); unsigned stream = nir_intrinsic_stream_id(intrin); s->vertex_count[stream] = intrin->src[0].ssa; s->primitive_count[stream] = intrin->src[1].ssa; nir_instr_remove(&intrin->instr); return true; } static bool lower_legacy_gs_intrinsic(nir_builder *b, nir_instr *instr, void *state) { lower_legacy_gs_state *s = (lower_legacy_gs_state *) state; if (instr->type != nir_instr_type_intrinsic) return false; nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr); if (intrin->intrinsic == nir_intrinsic_store_output) return lower_legacy_gs_store_output(b, intrin, s); else if (intrin->intrinsic == nir_intrinsic_emit_vertex_with_counter) return lower_legacy_gs_emit_vertex_with_counter(b, intrin, s); else if (intrin->intrinsic == nir_intrinsic_set_vertex_and_primitive_count) return lower_legacy_gs_set_vertex_and_primitive_count(b, intrin, s); return false; } void ac_nir_lower_legacy_gs(nir_shader *nir, bool has_gen_prim_query, bool has_pipeline_stats_query, ac_nir_gs_output_info *output_info) { lower_legacy_gs_state s = { .info = output_info, }; unsigned num_vertices_per_primitive = 0; switch (nir->info.gs.output_primitive) { case SHADER_PRIM_POINTS: num_vertices_per_primitive = 1; break; case SHADER_PRIM_LINE_STRIP: num_vertices_per_primitive = 2; break; case SHADER_PRIM_TRIANGLE_STRIP: num_vertices_per_primitive = 3; break; default: unreachable("Invalid GS output primitive."); break; } nir_shader_instructions_pass(nir, lower_legacy_gs_intrinsic, nir_metadata_block_index | nir_metadata_dominance, &s); nir_function_impl *impl = nir_shader_get_entrypoint(nir); nir_builder builder; nir_builder *b = &builder; nir_builder_init(b, impl); b->cursor = nir_after_cf_list(&impl->body); /* Emit shader query for mix use legacy/NGG GS */ bool progress = ac_nir_gs_shader_query(b, has_gen_prim_query, has_pipeline_stats_query, num_vertices_per_primitive, 64, s.vertex_count, s.primitive_count); if (progress) nir_metadata_preserve(impl, nir_metadata_none); }