| /* |
| * Copyright 2017 Advanced Micro Devices, Inc. |
| * |
| * 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 |
| * on the rights to use, copy, modify, merge, publish, distribute, sub |
| * license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHOR(S) AND/OR THEIR SUPPLIERS 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. |
| */ |
| |
| /* |
| * Remap load_uniform intrinsics to UBO accesses of UBO binding point 0. Both |
| * the base and the offset are interpreted as 16-byte units. |
| * |
| * Simultaneously, remap existing UBO accesses by increasing their binding |
| * point by 1. |
| */ |
| |
| #include "compiler/nir/nir.h" |
| #include "compiler/nir/nir_builder.h" |
| #include "st_nir.h" |
| |
| #include "program/prog_parameter.h" |
| |
| static bool |
| lower_instr(nir_intrinsic_instr *instr, nir_builder *b) |
| { |
| b->cursor = nir_before_instr(&instr->instr); |
| |
| if (instr->intrinsic == nir_intrinsic_load_ubo) { |
| nir_ssa_def *old_idx = nir_ssa_for_src(b, instr->src[0], 1); |
| nir_ssa_def *new_idx = nir_iadd(b, old_idx, nir_imm_int(b, 1)); |
| nir_instr_rewrite_src(&instr->instr, &instr->src[0], |
| nir_src_for_ssa(new_idx)); |
| return true; |
| } |
| |
| if (instr->intrinsic == nir_intrinsic_load_uniform) { |
| nir_ssa_def *ubo_idx = nir_imm_int(b, 0); |
| nir_ssa_def *ubo_offset = |
| nir_iadd(b, nir_imm_int(b, 4 * nir_intrinsic_base(instr)), |
| nir_imul(b, nir_imm_int(b, 4), |
| nir_ssa_for_src(b, instr->src[0], 1))); |
| |
| nir_intrinsic_instr *load = |
| nir_intrinsic_instr_create(b->shader, nir_intrinsic_load_ubo); |
| load->num_components = instr->num_components; |
| load->src[0] = nir_src_for_ssa(ubo_idx); |
| load->src[1] = nir_src_for_ssa(ubo_offset); |
| nir_ssa_dest_init(&load->instr, &load->dest, |
| load->num_components, instr->dest.ssa.bit_size, |
| instr->dest.ssa.name); |
| nir_builder_instr_insert(b, &load->instr); |
| nir_ssa_def_rewrite_uses(&instr->dest.ssa, nir_src_for_ssa(&load->dest.ssa)); |
| |
| nir_instr_remove(&instr->instr); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| bool |
| st_nir_lower_uniforms_to_ubo(nir_shader *shader) |
| { |
| bool progress = false; |
| |
| nir_foreach_function(function, shader) { |
| if (function->impl) { |
| nir_builder builder; |
| nir_builder_init(&builder, function->impl); |
| nir_foreach_block(block, function->impl) { |
| nir_foreach_instr_safe(instr, block) { |
| if (instr->type == nir_instr_type_intrinsic) |
| progress |= lower_instr(nir_instr_as_intrinsic(instr), |
| &builder); |
| } |
| } |
| |
| nir_metadata_preserve(function->impl, nir_metadata_block_index | |
| nir_metadata_dominance); |
| } |
| } |
| |
| return progress; |
| } |
| |