| /* |
| * Copyright © 2014 Intel 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. |
| * |
| * Authors: |
| * Connor Abbott (cwabbott0@gmail.com) |
| * Jason Ekstrand (jason@jlekstrand.net) |
| * |
| */ |
| |
| /* |
| * This lowering pass converts references to input/output variables with |
| * loads/stores to actual input/output intrinsics. |
| */ |
| |
| #include "nir.h" |
| #include "nir_builder.h" |
| #include "nir_deref.h" |
| |
| struct lower_io_state { |
| void *dead_ctx; |
| nir_builder builder; |
| int (*type_size)(const struct glsl_type *type, bool); |
| nir_variable_mode modes; |
| nir_lower_io_options options; |
| }; |
| |
| static nir_intrinsic_op |
| ssbo_atomic_for_deref(nir_intrinsic_op deref_op) |
| { |
| switch (deref_op) { |
| #define OP(O) case nir_intrinsic_deref_##O: return nir_intrinsic_ssbo_##O; |
| OP(atomic_exchange) |
| OP(atomic_comp_swap) |
| OP(atomic_add) |
| OP(atomic_imin) |
| OP(atomic_umin) |
| OP(atomic_imax) |
| OP(atomic_umax) |
| OP(atomic_and) |
| OP(atomic_or) |
| OP(atomic_xor) |
| OP(atomic_fadd) |
| OP(atomic_fmin) |
| OP(atomic_fmax) |
| OP(atomic_fcomp_swap) |
| #undef OP |
| default: |
| unreachable("Invalid SSBO atomic"); |
| } |
| } |
| |
| static nir_intrinsic_op |
| global_atomic_for_deref(nir_intrinsic_op deref_op) |
| { |
| switch (deref_op) { |
| #define OP(O) case nir_intrinsic_deref_##O: return nir_intrinsic_global_##O; |
| OP(atomic_exchange) |
| OP(atomic_comp_swap) |
| OP(atomic_add) |
| OP(atomic_imin) |
| OP(atomic_umin) |
| OP(atomic_imax) |
| OP(atomic_umax) |
| OP(atomic_and) |
| OP(atomic_or) |
| OP(atomic_xor) |
| OP(atomic_fadd) |
| OP(atomic_fmin) |
| OP(atomic_fmax) |
| OP(atomic_fcomp_swap) |
| #undef OP |
| default: |
| unreachable("Invalid SSBO atomic"); |
| } |
| } |
| |
| void |
| nir_assign_var_locations(struct exec_list *var_list, unsigned *size, |
| int (*type_size)(const struct glsl_type *, bool)) |
| { |
| unsigned location = 0; |
| |
| nir_foreach_variable(var, var_list) { |
| /* |
| * UBOs have their own address spaces, so don't count them towards the |
| * number of global uniforms |
| */ |
| if (var->data.mode == nir_var_mem_ubo || var->data.mode == nir_var_mem_ssbo) |
| continue; |
| |
| var->data.driver_location = location; |
| bool bindless_type_size = var->data.mode == nir_var_shader_in || |
| var->data.mode == nir_var_shader_out || |
| var->data.bindless; |
| location += type_size(var->type, bindless_type_size); |
| } |
| |
| *size = location; |
| } |
| |
| /** |
| * Return true if the given variable is a per-vertex input/output array. |
| * (such as geometry shader inputs). |
| */ |
| bool |
| nir_is_per_vertex_io(const nir_variable *var, gl_shader_stage stage) |
| { |
| if (var->data.patch || !glsl_type_is_array(var->type)) |
| return false; |
| |
| if (var->data.mode == nir_var_shader_in) |
| return stage == MESA_SHADER_GEOMETRY || |
| stage == MESA_SHADER_TESS_CTRL || |
| stage == MESA_SHADER_TESS_EVAL; |
| |
| if (var->data.mode == nir_var_shader_out) |
| return stage == MESA_SHADER_TESS_CTRL; |
| |
| return false; |
| } |
| |
| static nir_ssa_def * |
| get_io_offset(nir_builder *b, nir_deref_instr *deref, |
| nir_ssa_def **vertex_index, |
| int (*type_size)(const struct glsl_type *, bool), |
| unsigned *component, bool bts) |
| { |
| nir_deref_path path; |
| nir_deref_path_init(&path, deref, NULL); |
| |
| assert(path.path[0]->deref_type == nir_deref_type_var); |
| nir_deref_instr **p = &path.path[1]; |
| |
| /* For per-vertex input arrays (i.e. geometry shader inputs), keep the |
| * outermost array index separate. Process the rest normally. |
| */ |
| if (vertex_index != NULL) { |
| assert((*p)->deref_type == nir_deref_type_array); |
| *vertex_index = nir_ssa_for_src(b, (*p)->arr.index, 1); |
| p++; |
| } |
| |
| if (path.path[0]->var->data.compact) { |
| assert((*p)->deref_type == nir_deref_type_array); |
| assert(glsl_type_is_scalar((*p)->type)); |
| |
| /* We always lower indirect dereferences for "compact" array vars. */ |
| const unsigned index = nir_src_as_uint((*p)->arr.index); |
| const unsigned total_offset = *component + index; |
| const unsigned slot_offset = total_offset / 4; |
| *component = total_offset % 4; |
| return nir_imm_int(b, type_size(glsl_vec4_type(), bts) * slot_offset); |
| } |
| |
| /* Just emit code and let constant-folding go to town */ |
| nir_ssa_def *offset = nir_imm_int(b, 0); |
| |
| for (; *p; p++) { |
| if ((*p)->deref_type == nir_deref_type_array) { |
| unsigned size = type_size((*p)->type, bts); |
| |
| nir_ssa_def *mul = |
| nir_imul_imm(b, nir_ssa_for_src(b, (*p)->arr.index, 1), size); |
| |
| offset = nir_iadd(b, offset, mul); |
| } else if ((*p)->deref_type == nir_deref_type_struct) { |
| /* p starts at path[1], so this is safe */ |
| nir_deref_instr *parent = *(p - 1); |
| |
| unsigned field_offset = 0; |
| for (unsigned i = 0; i < (*p)->strct.index; i++) { |
| field_offset += type_size(glsl_get_struct_field(parent->type, i), bts); |
| } |
| offset = nir_iadd_imm(b, offset, field_offset); |
| } else { |
| unreachable("Unsupported deref type"); |
| } |
| } |
| |
| nir_deref_path_finish(&path); |
| |
| return offset; |
| } |
| |
| static nir_intrinsic_instr * |
| lower_load(nir_intrinsic_instr *intrin, struct lower_io_state *state, |
| nir_ssa_def *vertex_index, nir_variable *var, nir_ssa_def *offset, |
| unsigned component) |
| { |
| const nir_shader *nir = state->builder.shader; |
| nir_variable_mode mode = var->data.mode; |
| nir_ssa_def *barycentric = NULL; |
| |
| nir_intrinsic_op op; |
| switch (mode) { |
| case nir_var_shader_in: |
| if (nir->info.stage == MESA_SHADER_FRAGMENT && |
| nir->options->use_interpolated_input_intrinsics && |
| var->data.interpolation != INTERP_MODE_FLAT) { |
| assert(vertex_index == NULL); |
| |
| nir_intrinsic_op bary_op; |
| if (var->data.sample || |
| (state->options & nir_lower_io_force_sample_interpolation)) |
| bary_op = nir_intrinsic_load_barycentric_sample; |
| else if (var->data.centroid) |
| bary_op = nir_intrinsic_load_barycentric_centroid; |
| else |
| bary_op = nir_intrinsic_load_barycentric_pixel; |
| |
| barycentric = nir_load_barycentric(&state->builder, bary_op, |
| var->data.interpolation); |
| op = nir_intrinsic_load_interpolated_input; |
| } else { |
| op = vertex_index ? nir_intrinsic_load_per_vertex_input : |
| nir_intrinsic_load_input; |
| } |
| break; |
| case nir_var_shader_out: |
| op = vertex_index ? nir_intrinsic_load_per_vertex_output : |
| nir_intrinsic_load_output; |
| break; |
| case nir_var_uniform: |
| op = nir_intrinsic_load_uniform; |
| break; |
| case nir_var_mem_shared: |
| op = nir_intrinsic_load_shared; |
| break; |
| default: |
| unreachable("Unknown variable mode"); |
| } |
| |
| nir_intrinsic_instr *load = |
| nir_intrinsic_instr_create(state->builder.shader, op); |
| load->num_components = intrin->num_components; |
| |
| nir_intrinsic_set_base(load, var->data.driver_location); |
| if (mode == nir_var_shader_in || mode == nir_var_shader_out) |
| nir_intrinsic_set_component(load, component); |
| |
| if (load->intrinsic == nir_intrinsic_load_uniform) |
| nir_intrinsic_set_range(load, |
| state->type_size(var->type, var->data.bindless)); |
| |
| if (vertex_index) { |
| load->src[0] = nir_src_for_ssa(vertex_index); |
| load->src[1] = nir_src_for_ssa(offset); |
| } else if (barycentric) { |
| load->src[0] = nir_src_for_ssa(barycentric); |
| load->src[1] = nir_src_for_ssa(offset); |
| } else { |
| load->src[0] = nir_src_for_ssa(offset); |
| } |
| |
| return load; |
| } |
| |
| static nir_intrinsic_instr * |
| lower_store(nir_intrinsic_instr *intrin, struct lower_io_state *state, |
| nir_ssa_def *vertex_index, nir_variable *var, nir_ssa_def *offset, |
| unsigned component) |
| { |
| nir_variable_mode mode = var->data.mode; |
| |
| nir_intrinsic_op op; |
| if (mode == nir_var_mem_shared) { |
| op = nir_intrinsic_store_shared; |
| } else { |
| assert(mode == nir_var_shader_out); |
| op = vertex_index ? nir_intrinsic_store_per_vertex_output : |
| nir_intrinsic_store_output; |
| } |
| |
| nir_intrinsic_instr *store = |
| nir_intrinsic_instr_create(state->builder.shader, op); |
| store->num_components = intrin->num_components; |
| |
| nir_src_copy(&store->src[0], &intrin->src[1], store); |
| |
| nir_intrinsic_set_base(store, var->data.driver_location); |
| |
| if (mode == nir_var_shader_out) |
| nir_intrinsic_set_component(store, component); |
| |
| nir_intrinsic_set_write_mask(store, nir_intrinsic_write_mask(intrin)); |
| |
| if (vertex_index) |
| store->src[1] = nir_src_for_ssa(vertex_index); |
| |
| store->src[vertex_index ? 2 : 1] = nir_src_for_ssa(offset); |
| |
| return store; |
| } |
| |
| static nir_intrinsic_instr * |
| lower_atomic(nir_intrinsic_instr *intrin, struct lower_io_state *state, |
| nir_variable *var, nir_ssa_def *offset) |
| { |
| assert(var->data.mode == nir_var_mem_shared); |
| |
| nir_intrinsic_op op; |
| switch (intrin->intrinsic) { |
| #define OP(O) case nir_intrinsic_deref_##O: op = nir_intrinsic_shared_##O; break; |
| OP(atomic_exchange) |
| OP(atomic_comp_swap) |
| OP(atomic_add) |
| OP(atomic_imin) |
| OP(atomic_umin) |
| OP(atomic_imax) |
| OP(atomic_umax) |
| OP(atomic_and) |
| OP(atomic_or) |
| OP(atomic_xor) |
| OP(atomic_fadd) |
| OP(atomic_fmin) |
| OP(atomic_fmax) |
| OP(atomic_fcomp_swap) |
| #undef OP |
| default: |
| unreachable("Invalid atomic"); |
| } |
| |
| nir_intrinsic_instr *atomic = |
| nir_intrinsic_instr_create(state->builder.shader, op); |
| |
| nir_intrinsic_set_base(atomic, var->data.driver_location); |
| |
| atomic->src[0] = nir_src_for_ssa(offset); |
| assert(nir_intrinsic_infos[intrin->intrinsic].num_srcs == |
| nir_intrinsic_infos[op].num_srcs); |
| for (unsigned i = 1; i < nir_intrinsic_infos[op].num_srcs; i++) { |
| nir_src_copy(&atomic->src[i], &intrin->src[i], atomic); |
| } |
| |
| return atomic; |
| } |
| |
| static nir_intrinsic_instr * |
| lower_interpolate_at(nir_intrinsic_instr *intrin, struct lower_io_state *state, |
| nir_variable *var, nir_ssa_def *offset, unsigned component) |
| { |
| assert(var->data.mode == nir_var_shader_in); |
| |
| /* Ignore interpolateAt() for flat variables - flat is flat. */ |
| if (var->data.interpolation == INTERP_MODE_FLAT) |
| return lower_load(intrin, state, NULL, var, offset, component); |
| |
| nir_intrinsic_op bary_op; |
| switch (intrin->intrinsic) { |
| case nir_intrinsic_interp_deref_at_centroid: |
| bary_op = (state->options & nir_lower_io_force_sample_interpolation) ? |
| nir_intrinsic_load_barycentric_sample : |
| nir_intrinsic_load_barycentric_centroid; |
| break; |
| case nir_intrinsic_interp_deref_at_sample: |
| bary_op = nir_intrinsic_load_barycentric_at_sample; |
| break; |
| case nir_intrinsic_interp_deref_at_offset: |
| bary_op = nir_intrinsic_load_barycentric_at_offset; |
| break; |
| default: |
| unreachable("Bogus interpolateAt() intrinsic."); |
| } |
| |
| nir_intrinsic_instr *bary_setup = |
| nir_intrinsic_instr_create(state->builder.shader, bary_op); |
| |
| nir_ssa_dest_init(&bary_setup->instr, &bary_setup->dest, 2, 32, NULL); |
| nir_intrinsic_set_interp_mode(bary_setup, var->data.interpolation); |
| |
| if (intrin->intrinsic == nir_intrinsic_interp_deref_at_sample || |
| intrin->intrinsic == nir_intrinsic_interp_deref_at_offset) |
| nir_src_copy(&bary_setup->src[0], &intrin->src[1], bary_setup); |
| |
| nir_builder_instr_insert(&state->builder, &bary_setup->instr); |
| |
| nir_intrinsic_instr *load = |
| nir_intrinsic_instr_create(state->builder.shader, |
| nir_intrinsic_load_interpolated_input); |
| load->num_components = intrin->num_components; |
| |
| nir_intrinsic_set_base(load, var->data.driver_location); |
| nir_intrinsic_set_component(load, component); |
| |
| load->src[0] = nir_src_for_ssa(&bary_setup->dest.ssa); |
| load->src[1] = nir_src_for_ssa(offset); |
| |
| return load; |
| } |
| |
| static bool |
| nir_lower_io_block(nir_block *block, |
| struct lower_io_state *state) |
| { |
| nir_builder *b = &state->builder; |
| const nir_shader_compiler_options *options = b->shader->options; |
| bool progress = false; |
| |
| nir_foreach_instr_safe(instr, block) { |
| if (instr->type != nir_instr_type_intrinsic) |
| continue; |
| |
| nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr); |
| |
| switch (intrin->intrinsic) { |
| case nir_intrinsic_load_deref: |
| case nir_intrinsic_store_deref: |
| case nir_intrinsic_deref_atomic_add: |
| case nir_intrinsic_deref_atomic_imin: |
| case nir_intrinsic_deref_atomic_umin: |
| case nir_intrinsic_deref_atomic_imax: |
| case nir_intrinsic_deref_atomic_umax: |
| case nir_intrinsic_deref_atomic_and: |
| case nir_intrinsic_deref_atomic_or: |
| case nir_intrinsic_deref_atomic_xor: |
| case nir_intrinsic_deref_atomic_exchange: |
| case nir_intrinsic_deref_atomic_comp_swap: |
| case nir_intrinsic_deref_atomic_fadd: |
| case nir_intrinsic_deref_atomic_fmin: |
| case nir_intrinsic_deref_atomic_fmax: |
| case nir_intrinsic_deref_atomic_fcomp_swap: |
| /* We can lower the io for this nir instrinsic */ |
| break; |
| case nir_intrinsic_interp_deref_at_centroid: |
| case nir_intrinsic_interp_deref_at_sample: |
| case nir_intrinsic_interp_deref_at_offset: |
| /* We can optionally lower these to load_interpolated_input */ |
| if (options->use_interpolated_input_intrinsics) |
| break; |
| default: |
| /* We can't lower the io for this nir instrinsic, so skip it */ |
| continue; |
| } |
| |
| nir_deref_instr *deref = nir_src_as_deref(intrin->src[0]); |
| |
| nir_variable *var = nir_deref_instr_get_variable(deref); |
| nir_variable_mode mode = var->data.mode; |
| |
| if ((state->modes & mode) == 0) |
| continue; |
| |
| if (mode != nir_var_shader_in && |
| mode != nir_var_shader_out && |
| mode != nir_var_mem_shared && |
| mode != nir_var_uniform) |
| continue; |
| |
| b->cursor = nir_before_instr(instr); |
| |
| const bool per_vertex = nir_is_per_vertex_io(var, b->shader->info.stage); |
| |
| nir_ssa_def *offset; |
| nir_ssa_def *vertex_index = NULL; |
| unsigned component_offset = var->data.location_frac; |
| bool bindless_type_size = mode == nir_var_shader_in || |
| mode == nir_var_shader_out || |
| var->data.bindless; |
| |
| offset = get_io_offset(b, deref, per_vertex ? &vertex_index : NULL, |
| state->type_size, &component_offset, |
| bindless_type_size); |
| |
| nir_intrinsic_instr *replacement; |
| |
| switch (intrin->intrinsic) { |
| case nir_intrinsic_load_deref: |
| replacement = lower_load(intrin, state, vertex_index, var, offset, |
| component_offset); |
| break; |
| |
| case nir_intrinsic_store_deref: |
| replacement = lower_store(intrin, state, vertex_index, var, offset, |
| component_offset); |
| break; |
| |
| case nir_intrinsic_deref_atomic_add: |
| case nir_intrinsic_deref_atomic_imin: |
| case nir_intrinsic_deref_atomic_umin: |
| case nir_intrinsic_deref_atomic_imax: |
| case nir_intrinsic_deref_atomic_umax: |
| case nir_intrinsic_deref_atomic_and: |
| case nir_intrinsic_deref_atomic_or: |
| case nir_intrinsic_deref_atomic_xor: |
| case nir_intrinsic_deref_atomic_exchange: |
| case nir_intrinsic_deref_atomic_comp_swap: |
| case nir_intrinsic_deref_atomic_fadd: |
| case nir_intrinsic_deref_atomic_fmin: |
| case nir_intrinsic_deref_atomic_fmax: |
| case nir_intrinsic_deref_atomic_fcomp_swap: |
| assert(vertex_index == NULL); |
| replacement = lower_atomic(intrin, state, var, offset); |
| break; |
| |
| case nir_intrinsic_interp_deref_at_centroid: |
| case nir_intrinsic_interp_deref_at_sample: |
| case nir_intrinsic_interp_deref_at_offset: |
| assert(vertex_index == NULL); |
| replacement = lower_interpolate_at(intrin, state, var, offset, |
| component_offset); |
| break; |
| |
| default: |
| continue; |
| } |
| |
| if (nir_intrinsic_infos[intrin->intrinsic].has_dest) { |
| if (intrin->dest.is_ssa) { |
| nir_ssa_dest_init(&replacement->instr, &replacement->dest, |
| intrin->dest.ssa.num_components, |
| intrin->dest.ssa.bit_size, NULL); |
| nir_ssa_def_rewrite_uses(&intrin->dest.ssa, |
| nir_src_for_ssa(&replacement->dest.ssa)); |
| } else { |
| nir_dest_copy(&replacement->dest, &intrin->dest, &intrin->instr); |
| } |
| } |
| |
| nir_instr_insert_before(&intrin->instr, &replacement->instr); |
| nir_instr_remove(&intrin->instr); |
| progress = true; |
| } |
| |
| return progress; |
| } |
| |
| static bool |
| nir_lower_io_impl(nir_function_impl *impl, |
| nir_variable_mode modes, |
| int (*type_size)(const struct glsl_type *, bool), |
| nir_lower_io_options options) |
| { |
| struct lower_io_state state; |
| bool progress = false; |
| |
| nir_builder_init(&state.builder, impl); |
| state.dead_ctx = ralloc_context(NULL); |
| state.modes = modes; |
| state.type_size = type_size; |
| state.options = options; |
| |
| nir_foreach_block(block, impl) { |
| progress |= nir_lower_io_block(block, &state); |
| } |
| |
| ralloc_free(state.dead_ctx); |
| |
| nir_metadata_preserve(impl, nir_metadata_block_index | |
| nir_metadata_dominance); |
| return progress; |
| } |
| |
| bool |
| nir_lower_io(nir_shader *shader, nir_variable_mode modes, |
| int (*type_size)(const struct glsl_type *, bool), |
| nir_lower_io_options options) |
| { |
| bool progress = false; |
| |
| nir_foreach_function(function, shader) { |
| if (function->impl) { |
| progress |= nir_lower_io_impl(function->impl, modes, |
| type_size, options); |
| } |
| } |
| |
| return progress; |
| } |
| |
| static unsigned |
| type_scalar_size_bytes(const struct glsl_type *type) |
| { |
| assert(glsl_type_is_vector_or_scalar(type) || |
| glsl_type_is_matrix(type)); |
| return glsl_type_is_boolean(type) ? 4 : glsl_get_bit_size(type) / 8; |
| } |
| |
| static nir_ssa_def * |
| build_addr_iadd(nir_builder *b, nir_ssa_def *addr, |
| nir_address_format addr_format, nir_ssa_def *offset) |
| { |
| assert(offset->num_components == 1); |
| assert(addr->bit_size == offset->bit_size); |
| |
| switch (addr_format) { |
| case nir_address_format_32bit_global: |
| case nir_address_format_64bit_global: |
| case nir_address_format_32bit_offset: |
| assert(addr->num_components == 1); |
| return nir_iadd(b, addr, offset); |
| |
| case nir_address_format_64bit_bounded_global: |
| assert(addr->num_components == 4); |
| return nir_vec4(b, nir_channel(b, addr, 0), |
| nir_channel(b, addr, 1), |
| nir_channel(b, addr, 2), |
| nir_iadd(b, nir_channel(b, addr, 3), offset)); |
| |
| case nir_address_format_32bit_index_offset: |
| assert(addr->num_components == 2); |
| return nir_vec2(b, nir_channel(b, addr, 0), |
| nir_iadd(b, nir_channel(b, addr, 1), offset)); |
| case nir_address_format_logical: |
| unreachable("Unsupported address format"); |
| } |
| unreachable("Invalid address format"); |
| } |
| |
| static nir_ssa_def * |
| build_addr_iadd_imm(nir_builder *b, nir_ssa_def *addr, |
| nir_address_format addr_format, int64_t offset) |
| { |
| return build_addr_iadd(b, addr, addr_format, |
| nir_imm_intN_t(b, offset, addr->bit_size)); |
| } |
| |
| static nir_ssa_def * |
| addr_to_index(nir_builder *b, nir_ssa_def *addr, |
| nir_address_format addr_format) |
| { |
| assert(addr_format == nir_address_format_32bit_index_offset); |
| assert(addr->num_components == 2); |
| return nir_channel(b, addr, 0); |
| } |
| |
| static nir_ssa_def * |
| addr_to_offset(nir_builder *b, nir_ssa_def *addr, |
| nir_address_format addr_format) |
| { |
| assert(addr_format == nir_address_format_32bit_index_offset); |
| assert(addr->num_components == 2); |
| return nir_channel(b, addr, 1); |
| } |
| |
| /** Returns true if the given address format resolves to a global address */ |
| static bool |
| addr_format_is_global(nir_address_format addr_format) |
| { |
| return addr_format == nir_address_format_32bit_global || |
| addr_format == nir_address_format_64bit_global || |
| addr_format == nir_address_format_64bit_bounded_global; |
| } |
| |
| static nir_ssa_def * |
| addr_to_global(nir_builder *b, nir_ssa_def *addr, |
| nir_address_format addr_format) |
| { |
| switch (addr_format) { |
| case nir_address_format_32bit_global: |
| case nir_address_format_64bit_global: |
| assert(addr->num_components == 1); |
| return addr; |
| |
| case nir_address_format_64bit_bounded_global: |
| assert(addr->num_components == 4); |
| return nir_iadd(b, nir_pack_64_2x32(b, nir_channels(b, addr, 0x3)), |
| nir_u2u64(b, nir_channel(b, addr, 3))); |
| |
| case nir_address_format_32bit_index_offset: |
| case nir_address_format_32bit_offset: |
| case nir_address_format_logical: |
| unreachable("Cannot get a 64-bit address with this address format"); |
| } |
| |
| unreachable("Invalid address format"); |
| } |
| |
| static bool |
| addr_format_needs_bounds_check(nir_address_format addr_format) |
| { |
| return addr_format == nir_address_format_64bit_bounded_global; |
| } |
| |
| static nir_ssa_def * |
| addr_is_in_bounds(nir_builder *b, nir_ssa_def *addr, |
| nir_address_format addr_format, unsigned size) |
| { |
| assert(addr_format == nir_address_format_64bit_bounded_global); |
| assert(addr->num_components == 4); |
| return nir_ige(b, nir_channel(b, addr, 2), |
| nir_iadd_imm(b, nir_channel(b, addr, 3), size)); |
| } |
| |
| static nir_ssa_def * |
| build_explicit_io_load(nir_builder *b, nir_intrinsic_instr *intrin, |
| nir_ssa_def *addr, nir_address_format addr_format, |
| unsigned num_components) |
| { |
| nir_variable_mode mode = nir_src_as_deref(intrin->src[0])->mode; |
| |
| nir_intrinsic_op op; |
| switch (mode) { |
| case nir_var_mem_ubo: |
| op = nir_intrinsic_load_ubo; |
| break; |
| case nir_var_mem_ssbo: |
| if (addr_format_is_global(addr_format)) |
| op = nir_intrinsic_load_global; |
| else |
| op = nir_intrinsic_load_ssbo; |
| break; |
| case nir_var_mem_global: |
| assert(addr_format_is_global(addr_format)); |
| op = nir_intrinsic_load_global; |
| break; |
| case nir_var_shader_in: |
| assert(addr_format_is_global(addr_format)); |
| op = nir_intrinsic_load_kernel_input; |
| break; |
| default: |
| unreachable("Unsupported explicit IO variable mode"); |
| } |
| |
| nir_intrinsic_instr *load = nir_intrinsic_instr_create(b->shader, op); |
| |
| if (addr_format_is_global(addr_format)) { |
| load->src[0] = nir_src_for_ssa(addr_to_global(b, addr, addr_format)); |
| } else { |
| load->src[0] = nir_src_for_ssa(addr_to_index(b, addr, addr_format)); |
| load->src[1] = nir_src_for_ssa(addr_to_offset(b, addr, addr_format)); |
| } |
| |
| if (mode != nir_var_mem_ubo && mode != nir_var_shader_in) |
| nir_intrinsic_set_access(load, nir_intrinsic_access(intrin)); |
| |
| /* TODO: We should try and provide a better alignment. For OpenCL, we need |
| * to plumb the alignment through from SPIR-V when we have one. |
| */ |
| nir_intrinsic_set_align(load, intrin->dest.ssa.bit_size / 8, 0); |
| |
| assert(intrin->dest.is_ssa); |
| load->num_components = num_components; |
| nir_ssa_dest_init(&load->instr, &load->dest, num_components, |
| intrin->dest.ssa.bit_size, intrin->dest.ssa.name); |
| |
| assert(load->dest.ssa.bit_size % 8 == 0); |
| |
| if (addr_format_needs_bounds_check(addr_format)) { |
| /* The Vulkan spec for robustBufferAccess gives us quite a few options |
| * as to what we can do with an OOB read. Unfortunately, returning |
| * undefined values isn't one of them so we return an actual zero. |
| */ |
| nir_ssa_def *zero = nir_imm_zero(b, load->num_components, |
| load->dest.ssa.bit_size); |
| |
| const unsigned load_size = |
| (load->dest.ssa.bit_size / 8) * load->num_components; |
| nir_push_if(b, addr_is_in_bounds(b, addr, addr_format, load_size)); |
| |
| nir_builder_instr_insert(b, &load->instr); |
| |
| nir_pop_if(b, NULL); |
| |
| return nir_if_phi(b, &load->dest.ssa, zero); |
| } else { |
| nir_builder_instr_insert(b, &load->instr); |
| return &load->dest.ssa; |
| } |
| } |
| |
| static void |
| build_explicit_io_store(nir_builder *b, nir_intrinsic_instr *intrin, |
| nir_ssa_def *addr, nir_address_format addr_format, |
| nir_ssa_def *value, nir_component_mask_t write_mask) |
| { |
| nir_variable_mode mode = nir_src_as_deref(intrin->src[0])->mode; |
| |
| nir_intrinsic_op op; |
| switch (mode) { |
| case nir_var_mem_ssbo: |
| if (addr_format_is_global(addr_format)) |
| op = nir_intrinsic_store_global; |
| else |
| op = nir_intrinsic_store_ssbo; |
| break; |
| case nir_var_mem_global: |
| assert(addr_format_is_global(addr_format)); |
| op = nir_intrinsic_store_global; |
| break; |
| default: |
| unreachable("Unsupported explicit IO variable mode"); |
| } |
| |
| nir_intrinsic_instr *store = nir_intrinsic_instr_create(b->shader, op); |
| |
| store->src[0] = nir_src_for_ssa(value); |
| if (addr_format_is_global(addr_format)) { |
| store->src[1] = nir_src_for_ssa(addr_to_global(b, addr, addr_format)); |
| } else { |
| store->src[1] = nir_src_for_ssa(addr_to_index(b, addr, addr_format)); |
| store->src[2] = nir_src_for_ssa(addr_to_offset(b, addr, addr_format)); |
| } |
| |
| nir_intrinsic_set_write_mask(store, write_mask); |
| |
| nir_intrinsic_set_access(store, nir_intrinsic_access(intrin)); |
| |
| /* TODO: We should try and provide a better alignment. For OpenCL, we need |
| * to plumb the alignment through from SPIR-V when we have one. |
| */ |
| nir_intrinsic_set_align(store, value->bit_size / 8, 0); |
| |
| assert(value->num_components == 1 || |
| value->num_components == intrin->num_components); |
| store->num_components = value->num_components; |
| |
| assert(value->bit_size % 8 == 0); |
| |
| if (addr_format_needs_bounds_check(addr_format)) { |
| const unsigned store_size = (value->bit_size / 8) * store->num_components; |
| nir_push_if(b, addr_is_in_bounds(b, addr, addr_format, store_size)); |
| |
| nir_builder_instr_insert(b, &store->instr); |
| |
| nir_pop_if(b, NULL); |
| } else { |
| nir_builder_instr_insert(b, &store->instr); |
| } |
| } |
| |
| static nir_ssa_def * |
| build_explicit_io_atomic(nir_builder *b, nir_intrinsic_instr *intrin, |
| nir_ssa_def *addr, nir_address_format addr_format) |
| { |
| nir_variable_mode mode = nir_src_as_deref(intrin->src[0])->mode; |
| const unsigned num_data_srcs = |
| nir_intrinsic_infos[intrin->intrinsic].num_srcs - 1; |
| |
| nir_intrinsic_op op; |
| switch (mode) { |
| case nir_var_mem_ssbo: |
| if (addr_format_is_global(addr_format)) |
| op = global_atomic_for_deref(intrin->intrinsic); |
| else |
| op = ssbo_atomic_for_deref(intrin->intrinsic); |
| break; |
| case nir_var_mem_global: |
| assert(addr_format_is_global(addr_format)); |
| op = global_atomic_for_deref(intrin->intrinsic); |
| break; |
| default: |
| unreachable("Unsupported explicit IO variable mode"); |
| } |
| |
| nir_intrinsic_instr *atomic = nir_intrinsic_instr_create(b->shader, op); |
| |
| unsigned src = 0; |
| if (addr_format_is_global(addr_format)) { |
| atomic->src[src++] = nir_src_for_ssa(addr_to_global(b, addr, addr_format)); |
| } else { |
| atomic->src[src++] = nir_src_for_ssa(addr_to_index(b, addr, addr_format)); |
| atomic->src[src++] = nir_src_for_ssa(addr_to_offset(b, addr, addr_format)); |
| } |
| for (unsigned i = 0; i < num_data_srcs; i++) { |
| atomic->src[src++] = nir_src_for_ssa(intrin->src[1 + i].ssa); |
| } |
| |
| /* Global atomics don't have access flags because they assume that the |
| * address may be non-uniform. |
| */ |
| if (!addr_format_is_global(addr_format)) |
| nir_intrinsic_set_access(atomic, nir_intrinsic_access(intrin)); |
| |
| assert(intrin->dest.ssa.num_components == 1); |
| nir_ssa_dest_init(&atomic->instr, &atomic->dest, |
| 1, intrin->dest.ssa.bit_size, intrin->dest.ssa.name); |
| |
| assert(atomic->dest.ssa.bit_size % 8 == 0); |
| |
| if (addr_format_needs_bounds_check(addr_format)) { |
| const unsigned atomic_size = atomic->dest.ssa.bit_size / 8; |
| nir_push_if(b, addr_is_in_bounds(b, addr, addr_format, atomic_size)); |
| |
| nir_builder_instr_insert(b, &atomic->instr); |
| |
| nir_pop_if(b, NULL); |
| return nir_if_phi(b, &atomic->dest.ssa, |
| nir_ssa_undef(b, 1, atomic->dest.ssa.bit_size)); |
| } else { |
| nir_builder_instr_insert(b, &atomic->instr); |
| return &atomic->dest.ssa; |
| } |
| } |
| |
| nir_ssa_def * |
| nir_explicit_io_address_from_deref(nir_builder *b, nir_deref_instr *deref, |
| nir_ssa_def *base_addr, |
| nir_address_format addr_format) |
| { |
| assert(deref->dest.is_ssa); |
| switch (deref->deref_type) { |
| case nir_deref_type_var: |
| assert(deref->mode == nir_var_shader_in); |
| return nir_imm_intN_t(b, deref->var->data.driver_location, |
| deref->dest.ssa.bit_size); |
| |
| case nir_deref_type_array: { |
| nir_deref_instr *parent = nir_deref_instr_parent(deref); |
| |
| unsigned stride = glsl_get_explicit_stride(parent->type); |
| if ((glsl_type_is_matrix(parent->type) && |
| glsl_matrix_type_is_row_major(parent->type)) || |
| (glsl_type_is_vector(parent->type) && stride == 0)) |
| stride = type_scalar_size_bytes(parent->type); |
| |
| assert(stride > 0); |
| |
| nir_ssa_def *index = nir_ssa_for_src(b, deref->arr.index, 1); |
| index = nir_i2i(b, index, base_addr->bit_size); |
| return build_addr_iadd(b, base_addr, addr_format, |
| nir_imul_imm(b, index, stride)); |
| } |
| |
| case nir_deref_type_ptr_as_array: { |
| nir_ssa_def *index = nir_ssa_for_src(b, deref->arr.index, 1); |
| index = nir_i2i(b, index, base_addr->bit_size); |
| unsigned stride = nir_deref_instr_ptr_as_array_stride(deref); |
| return build_addr_iadd(b, base_addr, addr_format, |
| nir_imul_imm(b, index, stride)); |
| } |
| |
| case nir_deref_type_array_wildcard: |
| unreachable("Wildcards should be lowered by now"); |
| break; |
| |
| case nir_deref_type_struct: { |
| nir_deref_instr *parent = nir_deref_instr_parent(deref); |
| int offset = glsl_get_struct_field_offset(parent->type, |
| deref->strct.index); |
| assert(offset >= 0); |
| return build_addr_iadd_imm(b, base_addr, addr_format, offset); |
| } |
| |
| case nir_deref_type_cast: |
| /* Nothing to do here */ |
| return base_addr; |
| } |
| |
| unreachable("Invalid NIR deref type"); |
| } |
| |
| void |
| nir_lower_explicit_io_instr(nir_builder *b, |
| nir_intrinsic_instr *intrin, |
| nir_ssa_def *addr, |
| nir_address_format addr_format) |
| { |
| b->cursor = nir_after_instr(&intrin->instr); |
| |
| nir_deref_instr *deref = nir_src_as_deref(intrin->src[0]); |
| unsigned vec_stride = glsl_get_explicit_stride(deref->type); |
| unsigned scalar_size = type_scalar_size_bytes(deref->type); |
| assert(vec_stride == 0 || glsl_type_is_vector(deref->type)); |
| assert(vec_stride == 0 || vec_stride >= scalar_size); |
| |
| if (intrin->intrinsic == nir_intrinsic_load_deref) { |
| nir_ssa_def *value; |
| if (vec_stride > scalar_size) { |
| nir_ssa_def *comps[4] = { NULL, }; |
| for (unsigned i = 0; i < intrin->num_components; i++) { |
| nir_ssa_def *comp_addr = build_addr_iadd_imm(b, addr, addr_format, |
| vec_stride * i); |
| comps[i] = build_explicit_io_load(b, intrin, comp_addr, |
| addr_format, 1); |
| } |
| value = nir_vec(b, comps, intrin->num_components); |
| } else { |
| value = build_explicit_io_load(b, intrin, addr, addr_format, |
| intrin->num_components); |
| } |
| nir_ssa_def_rewrite_uses(&intrin->dest.ssa, nir_src_for_ssa(value)); |
| } else if (intrin->intrinsic == nir_intrinsic_store_deref) { |
| assert(intrin->src[1].is_ssa); |
| nir_ssa_def *value = intrin->src[1].ssa; |
| nir_component_mask_t write_mask = nir_intrinsic_write_mask(intrin); |
| if (vec_stride > scalar_size) { |
| for (unsigned i = 0; i < intrin->num_components; i++) { |
| if (!(write_mask & (1 << i))) |
| continue; |
| |
| nir_ssa_def *comp_addr = build_addr_iadd_imm(b, addr, addr_format, |
| vec_stride * i); |
| build_explicit_io_store(b, intrin, comp_addr, addr_format, |
| nir_channel(b, value, i), 1); |
| } |
| } else { |
| build_explicit_io_store(b, intrin, addr, addr_format, |
| value, write_mask); |
| } |
| } else { |
| nir_ssa_def *value = |
| build_explicit_io_atomic(b, intrin, addr, addr_format); |
| nir_ssa_def_rewrite_uses(&intrin->dest.ssa, nir_src_for_ssa(value)); |
| } |
| |
| nir_instr_remove(&intrin->instr); |
| } |
| |
| static void |
| lower_explicit_io_deref(nir_builder *b, nir_deref_instr *deref, |
| nir_address_format addr_format) |
| { |
| /* Just delete the deref if it's not used. We can't use |
| * nir_deref_instr_remove_if_unused here because it may remove more than |
| * one deref which could break our list walking since we walk the list |
| * backwards. |
| */ |
| assert(list_empty(&deref->dest.ssa.if_uses)); |
| if (list_empty(&deref->dest.ssa.uses)) { |
| nir_instr_remove(&deref->instr); |
| return; |
| } |
| |
| b->cursor = nir_after_instr(&deref->instr); |
| |
| nir_ssa_def *base_addr = NULL; |
| if (deref->deref_type != nir_deref_type_var) { |
| assert(deref->parent.is_ssa); |
| base_addr = deref->parent.ssa; |
| } |
| |
| nir_ssa_def *addr = nir_explicit_io_address_from_deref(b, deref, base_addr, |
| addr_format); |
| |
| nir_instr_remove(&deref->instr); |
| nir_ssa_def_rewrite_uses(&deref->dest.ssa, nir_src_for_ssa(addr)); |
| } |
| |
| static void |
| lower_explicit_io_access(nir_builder *b, nir_intrinsic_instr *intrin, |
| nir_address_format addr_format) |
| { |
| assert(intrin->src[0].is_ssa); |
| nir_lower_explicit_io_instr(b, intrin, intrin->src[0].ssa, addr_format); |
| } |
| |
| static void |
| lower_explicit_io_array_length(nir_builder *b, nir_intrinsic_instr *intrin, |
| nir_address_format addr_format) |
| { |
| b->cursor = nir_after_instr(&intrin->instr); |
| |
| nir_deref_instr *deref = nir_src_as_deref(intrin->src[0]); |
| |
| assert(glsl_type_is_array(deref->type)); |
| assert(glsl_get_length(deref->type) == 0); |
| unsigned stride = glsl_get_explicit_stride(deref->type); |
| assert(stride > 0); |
| |
| assert(addr_format == nir_address_format_32bit_index_offset); |
| nir_ssa_def *addr = &deref->dest.ssa; |
| nir_ssa_def *index = addr_to_index(b, addr, addr_format); |
| nir_ssa_def *offset = addr_to_offset(b, addr, addr_format); |
| |
| nir_intrinsic_instr *bsize = |
| nir_intrinsic_instr_create(b->shader, nir_intrinsic_get_buffer_size); |
| bsize->src[0] = nir_src_for_ssa(index); |
| nir_ssa_dest_init(&bsize->instr, &bsize->dest, 1, 32, NULL); |
| nir_builder_instr_insert(b, &bsize->instr); |
| |
| nir_ssa_def *arr_size = |
| nir_idiv(b, nir_isub(b, &bsize->dest.ssa, offset), |
| nir_imm_int(b, stride)); |
| |
| nir_ssa_def_rewrite_uses(&intrin->dest.ssa, nir_src_for_ssa(arr_size)); |
| nir_instr_remove(&intrin->instr); |
| } |
| |
| static bool |
| nir_lower_explicit_io_impl(nir_function_impl *impl, nir_variable_mode modes, |
| nir_address_format addr_format) |
| { |
| bool progress = false; |
| |
| nir_builder b; |
| nir_builder_init(&b, impl); |
| |
| /* Walk in reverse order so that we can see the full deref chain when we |
| * lower the access operations. We lower them assuming that the derefs |
| * will be turned into address calculations later. |
| */ |
| nir_foreach_block_reverse(block, impl) { |
| nir_foreach_instr_reverse_safe(instr, block) { |
| switch (instr->type) { |
| case nir_instr_type_deref: { |
| nir_deref_instr *deref = nir_instr_as_deref(instr); |
| if (deref->mode & modes) { |
| lower_explicit_io_deref(&b, deref, addr_format); |
| progress = true; |
| } |
| break; |
| } |
| |
| case nir_instr_type_intrinsic: { |
| nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr); |
| switch (intrin->intrinsic) { |
| case nir_intrinsic_load_deref: |
| case nir_intrinsic_store_deref: |
| case nir_intrinsic_deref_atomic_add: |
| case nir_intrinsic_deref_atomic_imin: |
| case nir_intrinsic_deref_atomic_umin: |
| case nir_intrinsic_deref_atomic_imax: |
| case nir_intrinsic_deref_atomic_umax: |
| case nir_intrinsic_deref_atomic_and: |
| case nir_intrinsic_deref_atomic_or: |
| case nir_intrinsic_deref_atomic_xor: |
| case nir_intrinsic_deref_atomic_exchange: |
| case nir_intrinsic_deref_atomic_comp_swap: |
| case nir_intrinsic_deref_atomic_fadd: |
| case nir_intrinsic_deref_atomic_fmin: |
| case nir_intrinsic_deref_atomic_fmax: |
| case nir_intrinsic_deref_atomic_fcomp_swap: { |
| nir_deref_instr *deref = nir_src_as_deref(intrin->src[0]); |
| if (deref->mode & modes) { |
| lower_explicit_io_access(&b, intrin, addr_format); |
| progress = true; |
| } |
| break; |
| } |
| |
| case nir_intrinsic_deref_buffer_array_length: { |
| nir_deref_instr *deref = nir_src_as_deref(intrin->src[0]); |
| if (deref->mode & modes) { |
| lower_explicit_io_array_length(&b, intrin, addr_format); |
| progress = true; |
| } |
| break; |
| } |
| |
| default: |
| break; |
| } |
| break; |
| } |
| |
| default: |
| /* Nothing to do */ |
| break; |
| } |
| } |
| } |
| |
| if (progress) { |
| nir_metadata_preserve(impl, nir_metadata_block_index | |
| nir_metadata_dominance); |
| } |
| |
| return progress; |
| } |
| |
| bool |
| nir_lower_explicit_io(nir_shader *shader, nir_variable_mode modes, |
| nir_address_format addr_format) |
| { |
| bool progress = false; |
| |
| nir_foreach_function(function, shader) { |
| if (function->impl && |
| nir_lower_explicit_io_impl(function->impl, modes, addr_format)) |
| progress = true; |
| } |
| |
| return progress; |
| } |
| |
| /** |
| * Return the offset source for a load/store intrinsic. |
| */ |
| nir_src * |
| nir_get_io_offset_src(nir_intrinsic_instr *instr) |
| { |
| switch (instr->intrinsic) { |
| case nir_intrinsic_load_input: |
| case nir_intrinsic_load_output: |
| case nir_intrinsic_load_shared: |
| case nir_intrinsic_load_uniform: |
| case nir_intrinsic_load_global: |
| case nir_intrinsic_load_scratch: |
| return &instr->src[0]; |
| case nir_intrinsic_load_ubo: |
| case nir_intrinsic_load_ssbo: |
| case nir_intrinsic_load_per_vertex_input: |
| case nir_intrinsic_load_per_vertex_output: |
| case nir_intrinsic_load_interpolated_input: |
| case nir_intrinsic_store_output: |
| case nir_intrinsic_store_shared: |
| case nir_intrinsic_store_global: |
| case nir_intrinsic_store_scratch: |
| return &instr->src[1]; |
| case nir_intrinsic_store_ssbo: |
| case nir_intrinsic_store_per_vertex_output: |
| return &instr->src[2]; |
| default: |
| return NULL; |
| } |
| } |
| |
| /** |
| * Return the vertex index source for a load/store per_vertex intrinsic. |
| */ |
| nir_src * |
| nir_get_io_vertex_index_src(nir_intrinsic_instr *instr) |
| { |
| switch (instr->intrinsic) { |
| case nir_intrinsic_load_per_vertex_input: |
| case nir_intrinsic_load_per_vertex_output: |
| return &instr->src[0]; |
| case nir_intrinsic_store_per_vertex_output: |
| return &instr->src[1]; |
| default: |
| return NULL; |
| } |
| } |
