diff options
Diffstat (limited to 'src/intel/vulkan/anv_nir_apply_dynamic_offsets.c')
| -rw-r--r-- | src/intel/vulkan/anv_nir_apply_dynamic_offsets.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/src/intel/vulkan/anv_nir_apply_dynamic_offsets.c b/src/intel/vulkan/anv_nir_apply_dynamic_offsets.c new file mode 100644 index 0000000..e71a8ff --- /dev/null +++ b/src/intel/vulkan/anv_nir_apply_dynamic_offsets.c @@ -0,0 +1,171 @@ +/* + * 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" + +struct apply_dynamic_offsets_state { + nir_shader *shader; + nir_builder builder; + + const struct anv_pipeline_layout *layout; + + uint32_t indices_start; +}; + +static bool +apply_dynamic_offsets_block(nir_block *block, void *void_state) +{ + struct apply_dynamic_offsets_state *state = void_state; + struct anv_descriptor_set_layout *set_layout; + + nir_builder *b = &state->builder; + + nir_foreach_instr_safe(block, instr) { + 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 = state->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 = state->layout->set[set].dynamic_offset_start + + set_layout->binding[binding].dynamic_offset_index; + + nir_intrinsic_instr *offset_load = + nir_intrinsic_instr_create(state->shader, nir_intrinsic_load_uniform); + offset_load->num_components = 2; + offset_load->const_index[0] = state->indices_start + index * 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, NULL); + nir_builder_instr_insert(b, &offset_load->instr); + + nir_src *offset_src = nir_get_io_offset_src(intrin); + nir_ssa_def *new_offset = nir_iadd(b, offset_src->ssa, + &offset_load->dest.ssa); + + /* 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), + offset_src->ssa); + 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); + *offset_src = nir_src_for_ssa(new_offset); + 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, 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_ssa_def *zero = nir_build_imm(b, intrin->num_components, + (nir_const_value) { .u = { 0, 0, 0, 0 } }); + + 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); + } + } + + return true; +} + +void +anv_nir_apply_dynamic_offsets(struct anv_pipeline *pipeline, + nir_shader *shader, + struct brw_stage_prog_data *prog_data) +{ + struct apply_dynamic_offsets_state state = { + .shader = shader, + .layout = pipeline->layout, + .indices_start = shader->num_uniforms, + }; + + if (!state.layout || !state.layout->stage[shader->stage].has_dynamic_offsets) + return; + + nir_foreach_function(shader, function) { + if (function->impl) { + nir_builder_init(&state.builder, function->impl); + nir_foreach_block(function->impl, apply_dynamic_offsets_block, &state); + 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] = + (const union gl_constant_value *)&null_data->dynamic[i].offset; + prog_data->param[i * 2 + 1 + shader->num_uniforms] = + (const union gl_constant_value *)&null_data->dynamic[i].range; + } + + shader->num_uniforms += MAX_DYNAMIC_BUFFERS * 8; +} |