| 0,0 → 1,149 |
|---|
| /* |
| * 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) |
| * |
| */ |
| |
| #include "nir.h" |
| #include "main/config.h" |
| #include <assert.h> |
| |
| /* |
| * replace atomic counter intrinsics that use a variable with intrinsics |
| * that directly store the buffer index and byte offset |
| */ |
| |
| static void |
| lower_instr(nir_intrinsic_instr *instr, nir_function_impl *impl) |
| { |
| nir_intrinsic_op op; |
| switch (instr->intrinsic) { |
| case nir_intrinsic_atomic_counter_read_var: |
| op = nir_intrinsic_atomic_counter_read; |
| break; |
| |
| case nir_intrinsic_atomic_counter_inc_var: |
| op = nir_intrinsic_atomic_counter_inc; |
| break; |
| |
| case nir_intrinsic_atomic_counter_dec_var: |
| op = nir_intrinsic_atomic_counter_dec; |
| break; |
| |
| default: |
| return; |
| } |
| |
| if (instr->variables[0]->var->data.mode != nir_var_uniform) |
| return; /* atomics passed as function arguments can't be lowered */ |
| |
| void *mem_ctx = ralloc_parent(instr); |
| |
| nir_intrinsic_instr *new_instr = nir_intrinsic_instr_create(mem_ctx, op); |
| new_instr->const_index[0] = |
| (int) instr->variables[0]->var->data.atomic.buffer_index; |
| |
| nir_load_const_instr *offset_const = nir_load_const_instr_create(mem_ctx, 1); |
| offset_const->value.u[0] = instr->variables[0]->var->data.atomic.offset; |
| |
| nir_instr_insert_before(&instr->instr, &offset_const->instr); |
| |
| nir_ssa_def *offset_def = &offset_const->def; |
| |
| if (instr->variables[0]->deref.child != NULL) { |
| assert(instr->variables[0]->deref.child->deref_type == |
| nir_deref_type_array); |
| nir_deref_array *deref_array = |
| nir_deref_as_array(instr->variables[0]->deref.child); |
| assert(deref_array->deref.child == NULL); |
| |
| offset_const->value.u[0] += |
| deref_array->base_offset * ATOMIC_COUNTER_SIZE; |
| |
| if (deref_array->deref_array_type == nir_deref_array_type_indirect) { |
| nir_load_const_instr *atomic_counter_size = |
| nir_load_const_instr_create(mem_ctx, 1); |
| atomic_counter_size->value.u[0] = ATOMIC_COUNTER_SIZE; |
| nir_instr_insert_before(&instr->instr, &atomic_counter_size->instr); |
| |
| nir_alu_instr *mul = nir_alu_instr_create(mem_ctx, nir_op_imul); |
| nir_ssa_dest_init(&mul->instr, &mul->dest.dest, 1, NULL); |
| mul->dest.write_mask = 0x1; |
| nir_src_copy(&mul->src[0].src, &deref_array->indirect, mem_ctx); |
| mul->src[1].src.is_ssa = true; |
| mul->src[1].src.ssa = &atomic_counter_size->def; |
| nir_instr_insert_before(&instr->instr, &mul->instr); |
| |
| nir_alu_instr *add = nir_alu_instr_create(mem_ctx, nir_op_iadd); |
| nir_ssa_dest_init(&add->instr, &add->dest.dest, 1, NULL); |
| add->dest.write_mask = 0x1; |
| add->src[0].src.is_ssa = true; |
| add->src[0].src.ssa = &mul->dest.dest.ssa; |
| add->src[1].src.is_ssa = true; |
| add->src[1].src.ssa = &offset_const->def; |
| nir_instr_insert_before(&instr->instr, &add->instr); |
| |
| offset_def = &add->dest.dest.ssa; |
| } |
| } |
| |
| new_instr->src[0].is_ssa = true; |
| new_instr->src[0].ssa = offset_def;; |
| |
| if (instr->dest.is_ssa) { |
| nir_ssa_dest_init(&new_instr->instr, &new_instr->dest, |
| instr->dest.ssa.num_components, NULL); |
| nir_ssa_def_rewrite_uses(&instr->dest.ssa, |
| nir_src_for_ssa(&new_instr->dest.ssa), |
| mem_ctx); |
| } else { |
| nir_dest_copy(&new_instr->dest, &instr->dest, mem_ctx); |
| } |
| |
| nir_instr_insert_before(&instr->instr, &new_instr->instr); |
| nir_instr_remove(&instr->instr); |
| } |
| |
| static bool |
| lower_block(nir_block *block, void *state) |
| { |
| nir_foreach_instr_safe(block, instr) { |
| if (instr->type == nir_instr_type_intrinsic) |
| lower_instr(nir_instr_as_intrinsic(instr), state); |
| } |
| |
| return true; |
| } |
| |
| void |
| nir_lower_atomics(nir_shader *shader) |
| { |
| nir_foreach_overload(shader, overload) { |
| if (overload->impl) { |
| nir_foreach_block(overload->impl, lower_block, overload->impl); |
| nir_metadata_preserve(overload->impl, nir_metadata_block_index | |
| nir_metadata_dominance); |
| } |
| } |
| } |