2014-07-30 20:07:45 +01:00
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/*
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* Copyright © 2014 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Connor Abbott (cwabbott0@gmail.com)
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*
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*/
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#include "nir.h"
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2015-12-15 02:56:59 +00:00
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#include "nir_builder.h"
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struct lower_system_values_state {
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nir_builder builder;
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bool progress;
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};
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2014-07-30 20:07:45 +01:00
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2015-09-17 21:00:58 +01:00
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static bool
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2015-12-15 02:56:59 +00:00
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convert_block(nir_block *block, void *void_state)
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2014-07-30 20:07:45 +01:00
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{
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2015-12-15 02:56:59 +00:00
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struct lower_system_values_state *state = void_state;
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2014-07-30 20:07:45 +01:00
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2015-12-15 02:56:59 +00:00
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nir_builder *b = &state->builder;
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2014-07-30 20:07:45 +01:00
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2015-12-15 02:56:59 +00:00
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nir_foreach_instr_safe(block, instr) {
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if (instr->type != nir_instr_type_intrinsic)
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continue;
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2014-07-30 20:07:45 +01:00
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2015-12-15 02:56:59 +00:00
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nir_intrinsic_instr *load_var = nir_instr_as_intrinsic(instr);
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2015-12-15 02:18:03 +00:00
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2015-12-15 02:56:59 +00:00
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if (load_var->intrinsic != nir_intrinsic_load_var)
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continue;
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2014-12-16 01:37:07 +00:00
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2015-12-15 02:56:59 +00:00
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nir_variable *var = load_var->variables[0]->var;
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if (var->data.mode != nir_var_system_value)
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continue;
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2014-12-16 01:37:07 +00:00
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2015-12-15 02:56:59 +00:00
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b->cursor = nir_after_instr(&load_var->instr);
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2015-09-17 21:00:58 +01:00
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2016-03-25 17:54:27 +00:00
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nir_ssa_def *sysval;
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switch (var->data.location) {
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case SYSTEM_VALUE_GLOBAL_INVOCATION_ID: {
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/* From the GLSL man page for gl_GlobalInvocationID:
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*
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* "The value of gl_GlobalInvocationID is equal to
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* gl_WorkGroupID * gl_WorkGroupSize + gl_LocalInvocationID"
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*/
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nir_const_value local_size;
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local_size.u32[0] = b->shader->info.cs.local_size[0];
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local_size.u32[1] = b->shader->info.cs.local_size[1];
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local_size.u32[2] = b->shader->info.cs.local_size[2];
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nir_ssa_def *group_id =
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nir_load_system_value(b, nir_intrinsic_load_work_group_id, 0);
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nir_ssa_def *local_id =
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nir_load_system_value(b, nir_intrinsic_load_local_invocation_id, 0);
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sysval = nir_iadd(b, nir_imul(b, group_id,
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nir_build_imm(b, 3, local_size)),
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local_id);
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break;
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}
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case SYSTEM_VALUE_LOCAL_INVOCATION_INDEX: {
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/* From the GLSL man page for gl_LocalInvocationIndex:
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*
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* "The value of gl_LocalInvocationIndex is equal to
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* gl_LocalInvocationID.z * gl_WorkGroupSize.x *
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* gl_WorkGroupSize.y + gl_LocalInvocationID.y *
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* gl_WorkGroupSize.x + gl_LocalInvocationID.x"
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*/
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nir_ssa_def *local_id =
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nir_load_system_value(b, nir_intrinsic_load_local_invocation_id, 0);
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nir_ssa_def *size_x = nir_imm_int(b, b->shader->info.cs.local_size[0]);
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nir_ssa_def *size_y = nir_imm_int(b, b->shader->info.cs.local_size[1]);
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sysval = nir_imul(b, nir_channel(b, local_id, 2),
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nir_imul(b, size_x, size_y));
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sysval = nir_iadd(b, sysval,
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nir_imul(b, nir_channel(b, local_id, 1), size_x));
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sysval = nir_iadd(b, sysval, nir_channel(b, local_id, 0));
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break;
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}
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case SYSTEM_VALUE_VERTEX_ID:
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if (b->shader->options->vertex_id_zero_based) {
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sysval = nir_iadd(b,
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nir_load_system_value(b, nir_intrinsic_load_vertex_id_zero_base, 0),
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nir_load_system_value(b, nir_intrinsic_load_base_vertex, 0));
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} else {
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sysval = nir_load_system_value(b, nir_intrinsic_load_vertex_id, 0);
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}
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break;
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case SYSTEM_VALUE_INSTANCE_INDEX:
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sysval = nir_iadd(b,
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nir_load_system_value(b, nir_intrinsic_load_instance_id, 0),
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nir_load_system_value(b, nir_intrinsic_load_base_instance, 0));
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break;
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default: {
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nir_intrinsic_op sysval_op =
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nir_intrinsic_from_system_value(var->data.location);
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sysval = nir_load_system_value(b, sysval_op, 0);
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break;
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} /* default */
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}
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2014-07-30 20:07:45 +01:00
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2015-12-15 02:56:59 +00:00
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nir_ssa_def_rewrite_uses(&load_var->dest.ssa, nir_src_for_ssa(sysval));
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nir_instr_remove(&load_var->instr);
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2014-07-30 20:07:45 +01:00
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2015-12-15 02:56:59 +00:00
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state->progress = true;
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2014-07-30 20:07:45 +01:00
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}
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return true;
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}
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2015-09-17 21:00:58 +01:00
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static bool
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2014-07-30 20:07:45 +01:00
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convert_impl(nir_function_impl *impl)
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{
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2015-12-15 02:56:59 +00:00
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struct lower_system_values_state state;
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2015-09-17 21:00:58 +01:00
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2015-12-15 02:56:59 +00:00
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state.progress = false;
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nir_builder_init(&state.builder, impl);
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2016-04-13 21:25:34 +01:00
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nir_foreach_block_call(impl, convert_block, &state);
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2014-12-13 00:25:38 +00:00
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nir_metadata_preserve(impl, nir_metadata_block_index |
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nir_metadata_dominance);
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2015-12-15 02:56:59 +00:00
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return state.progress;
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2014-07-30 20:07:45 +01:00
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}
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2015-09-17 21:00:58 +01:00
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bool
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2014-07-30 20:07:45 +01:00
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nir_lower_system_values(nir_shader *shader)
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{
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2015-09-17 21:00:58 +01:00
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bool progress = false;
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2015-12-26 18:00:47 +00:00
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nir_foreach_function(shader, function) {
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if (function->impl)
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progress = convert_impl(function->impl) || progress;
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2014-07-30 20:07:45 +01:00
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}
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exec_list_make_empty(&shader->system_values);
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2015-09-17 21:00:58 +01:00
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return progress;
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2014-07-30 20:07:45 +01:00
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}
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