| /* |
| * Copyright (C) 2021 Alyssa Rosenzweig <alyssa@rosenzweig.io> |
| * Copyright (C) 2020 Collabora Ltd. |
| * Copyright © 2016 Broadcom |
| * |
| * 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 "agx_compiler.h" |
| #include "compiler/nir/nir.h" |
| #include "compiler/nir/nir_builder.h" |
| #include "compiler/nir/nir_builtin_builder.h" |
| |
| /* |
| * NIR indexes into array textures with unclamped floats (integer for txf). AGX |
| * requires the index to be a clamped integer. Lower tex_src_coord into |
| * tex_src_backend1 for array textures by type-converting and clamping. |
| */ |
| static bool |
| lower_array_texture(nir_builder *b, nir_instr *instr, UNUSED void *data) |
| { |
| if (instr->type != nir_instr_type_tex) |
| return false; |
| |
| nir_tex_instr *tex = nir_instr_as_tex(instr); |
| b->cursor = nir_before_instr(instr); |
| |
| if (!tex->is_array || nir_tex_instr_is_query(tex)) |
| return false; |
| |
| /* Get the coordinates */ |
| int coord_idx = nir_tex_instr_src_index(tex, nir_tex_src_coord); |
| nir_ssa_def *coord = tex->src[coord_idx].src.ssa; |
| unsigned nr = nir_src_num_components(tex->src[coord_idx].src); |
| |
| /* The layer is always the last component of the NIR coordinate */ |
| unsigned lidx = nr - 1; |
| nir_ssa_def *layer = nir_channel(b, coord, lidx); |
| |
| /* Round layer to nearest even */ |
| if (tex->op != nir_texop_txf) |
| layer = nir_f2u32(b, nir_fround_even(b, layer)); |
| |
| /* Clamp to max layer = (# of layers - 1) for out-of-bounds handling */ |
| nir_ssa_def *txs = nir_get_texture_size(b, tex); |
| nir_ssa_def *nr_layers = nir_channel(b, txs, lidx); |
| layer = nir_umin(b, layer, nir_iadd_imm(b, nr_layers, -1)); |
| |
| nir_tex_instr_remove_src(tex, coord_idx); |
| nir_tex_instr_add_src(tex, nir_tex_src_backend1, |
| nir_src_for_ssa(nir_vector_insert_imm(b, coord, layer, |
| lidx))); |
| return true; |
| } |
| |
| bool |
| agx_nir_lower_array_texture(nir_shader *s) |
| { |
| return nir_shader_instructions_pass(s, lower_array_texture, |
| nir_metadata_block_index | |
| nir_metadata_dominance, NULL); |
| } |