/* * Copyright © 2015 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. */ #include "anv_nir.h" #include "nir/nir_builder.h" static void apply_dynamic_offsets_block(nir_block *block, nir_builder *b, const struct anv_pipeline_layout *layout, bool add_bounds_checks, uint32_t indices_start) { struct anv_descriptor_set_layout *set_layout; nir_foreach_instr_safe(instr, block) { if (instr->type != nir_instr_type_intrinsic) continue; nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr); unsigned block_idx_src; switch (intrin->intrinsic) { case nir_intrinsic_load_ubo: case nir_intrinsic_load_ssbo: block_idx_src = 0; break; case nir_intrinsic_store_ssbo: block_idx_src = 1; break; default: continue; /* the loop */ } nir_instr *res_instr = intrin->src[block_idx_src].ssa->parent_instr; assert(res_instr->type == nir_instr_type_intrinsic); nir_intrinsic_instr *res_intrin = nir_instr_as_intrinsic(res_instr); assert(res_intrin->intrinsic == nir_intrinsic_vulkan_resource_index); unsigned set = res_intrin->const_index[0]; unsigned binding = res_intrin->const_index[1]; set_layout = layout->set[set].layout; if (set_layout->binding[binding].dynamic_offset_index < 0) continue; b->cursor = nir_before_instr(&intrin->instr); /* First, we need to generate the uniform load for the buffer offset */ uint32_t index = layout->set[set].dynamic_offset_start + set_layout->binding[binding].dynamic_offset_index; uint32_t array_size = set_layout->binding[binding].array_size; nir_intrinsic_instr *offset_load = nir_intrinsic_instr_create(b->shader, nir_intrinsic_load_uniform); offset_load->num_components = 2; nir_intrinsic_set_base(offset_load, indices_start + index * 8); nir_intrinsic_set_range(offset_load, array_size * 8); offset_load->src[0] = nir_src_for_ssa(nir_imul(b, res_intrin->src[0].ssa, nir_imm_int(b, 8))); nir_ssa_dest_init(&offset_load->instr, &offset_load->dest, 2, 32, NULL); nir_builder_instr_insert(b, &offset_load->instr); nir_src *offset_src = nir_get_io_offset_src(intrin); nir_ssa_def *old_offset = nir_ssa_for_src(b, *offset_src, 1); nir_ssa_def *new_offset = nir_iadd(b, old_offset, &offset_load->dest.ssa); nir_instr_rewrite_src(&intrin->instr, offset_src, nir_src_for_ssa(new_offset)); if (!add_bounds_checks) continue; /* In order to avoid out-of-bounds access, we predicate */ nir_ssa_def *pred = nir_uge(b, nir_channel(b, &offset_load->dest.ssa, 1), old_offset); nir_if *if_stmt = nir_if_create(b->shader); if_stmt->condition = nir_src_for_ssa(pred); nir_cf_node_insert(b->cursor, &if_stmt->cf_node); nir_instr_remove(&intrin->instr); nir_instr_insert_after_cf_list(&if_stmt->then_list, &intrin->instr); if (intrin->intrinsic != nir_intrinsic_store_ssbo) { /* It's a load, we need a phi node */ nir_phi_instr *phi = nir_phi_instr_create(b->shader); nir_ssa_dest_init(&phi->instr, &phi->dest, intrin->num_components, intrin->dest.ssa.bit_size, NULL); nir_phi_src *src1 = ralloc(phi, nir_phi_src); struct exec_node *tnode = exec_list_get_tail(&if_stmt->then_list); src1->pred = exec_node_data(nir_block, tnode, cf_node.node); src1->src = nir_src_for_ssa(&intrin->dest.ssa); exec_list_push_tail(&phi->srcs, &src1->node); b->cursor = nir_after_cf_list(&if_stmt->else_list); nir_const_value zero_val = { .u32 = { 0, 0, 0, 0 } }; nir_ssa_def *zero = nir_build_imm(b, intrin->num_components, intrin->dest.ssa.bit_size, zero_val); nir_phi_src *src2 = ralloc(phi, nir_phi_src); struct exec_node *enode = exec_list_get_tail(&if_stmt->else_list); src2->pred = exec_node_data(nir_block, enode, cf_node.node); src2->src = nir_src_for_ssa(zero); exec_list_push_tail(&phi->srcs, &src2->node); assert(intrin->dest.is_ssa); nir_ssa_def_rewrite_uses(&intrin->dest.ssa, nir_src_for_ssa(&phi->dest.ssa)); nir_instr_insert_after_cf(&if_stmt->cf_node, &phi->instr); } } } void anv_nir_apply_dynamic_offsets(struct anv_pipeline *pipeline, nir_shader *shader, struct brw_stage_prog_data *prog_data) { const struct anv_pipeline_layout *layout = pipeline->layout; if (!layout || !layout->stage[shader->stage].has_dynamic_offsets) return; const bool add_bounds_checks = pipeline->device->robust_buffer_access; nir_foreach_function(function, shader) { if (!function->impl) continue; nir_builder builder; nir_builder_init(&builder, function->impl); nir_foreach_block(block, function->impl) { apply_dynamic_offsets_block(block, &builder, pipeline->layout, add_bounds_checks, shader->num_uniforms); } nir_metadata_preserve(function->impl, nir_metadata_block_index | nir_metadata_dominance); } struct anv_push_constants *null_data = NULL; for (unsigned i = 0; i < MAX_DYNAMIC_BUFFERS; i++) { prog_data->param[i * 2 + shader->num_uniforms / 4] = (const union gl_constant_value *)&null_data->dynamic[i].offset; prog_data->param[i * 2 + 1 + shader->num_uniforms / 4] = (const union gl_constant_value *)&null_data->dynamic[i].range; } shader->num_uniforms += MAX_DYNAMIC_BUFFERS * 8; }