src/intel/vulkan/anv_nir_add_base_work_group_id.c

   1 /*
   2  * Copyright © 2017 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include "anv_nir.h"
  25 #include "nir/nir_builder.h"
  26 #include "compiler/brw_compiler.h"
  27
  28 bool
  29 anv_nir_add_base_work_group_id(nir_shader *shader,
  30                                struct brw_cs_prog_data *prog_data)
  31 {
  32    assert(shader->info.stage == MESA_SHADER_COMPUTE);
  33
  34    nir_builder b;
  35    int base_id_offset = -1;
  36    bool progress = false;
  37    nir_foreach_function(function, shader) {
  38       if (!function->impl)
  39          continue;
  40
  41       nir_builder_init(&b, function->impl);
  42
  43       nir_foreach_block(block, function->impl) {
  44          nir_foreach_instr_safe(instr, block) {
  45             if (instr->type != nir_instr_type_intrinsic)
  46                continue;
  47
  48             nir_intrinsic_instr *load_id = nir_instr_as_intrinsic(instr);
  49             if (load_id->intrinsic != nir_intrinsic_load_work_group_id)
  50                continue;
  51
  52             b.cursor = nir_after_instr(&load_id->instr);
  53
  54             if (base_id_offset < 0) {
  55                /* If we don't have a set of BASE_WORK_GROUP_ID params,
  56                 * add them.
  57                 */
  58                assert(shader->num_uniforms == prog_data->base.nr_params * 4);
  59                uint32_t *param =
  60                   brw_stage_prog_data_add_params(&prog_data->base, 3);
  61                param[0] = BRW_PARAM_BUILTIN_BASE_WORK_GROUP_ID_X;
  62                param[1] = BRW_PARAM_BUILTIN_BASE_WORK_GROUP_ID_Y;
  63                param[2] = BRW_PARAM_BUILTIN_BASE_WORK_GROUP_ID_Z;
  64
  65                base_id_offset = shader->num_uniforms;
  66                shader->num_uniforms += 12;
  67             }
  68
  69             nir_intrinsic_instr *load_base =
  70                nir_intrinsic_instr_create(shader, nir_intrinsic_load_uniform);
  71             load_base->num_components = 3;
  72             load_base->src[0] = nir_src_for_ssa(nir_imm_int(&b, 0));
  73             nir_ssa_dest_init(&load_base->instr, &load_base->dest, 3, 32, NULL);
  74             nir_intrinsic_set_base(load_base, base_id_offset);
  75             nir_intrinsic_set_range(load_base, 3 * sizeof(uint32_t));
  76             nir_builder_instr_insert(&b, &load_base->instr);
  77
  78             nir_ssa_def *id = nir_iadd(&b, &load_id->dest.ssa,
  79                                            &load_base->dest.ssa);
  80
  81             nir_ssa_def_rewrite_uses_after(&load_id->dest.ssa,
  82                                            nir_src_for_ssa(id),
  83                                            id->parent_instr);
  84             progress = true;
  85          }
  86       }
  87
  88       nir_metadata_preserve(function->impl, nir_metadata_block_index |
  89                                             nir_metadata_dominance);
  90    }
  91
  92    return progress;
  93 }