| /* |
| * Copyright © 2018 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. |
| */ |
| |
| #include "nir.h" |
| #include "nir_builder.h" |
| |
| static bool |
| assert_ssa_def_is_not_1bit(nir_ssa_def *def, UNUSED void *unused) |
| { |
| assert(def->bit_size > 1); |
| return true; |
| } |
| |
| static bool |
| rewrite_1bit_ssa_def_to_32bit(nir_ssa_def *def, void *_progress) |
| { |
| bool *progress = _progress; |
| if (def->bit_size == 1) { |
| def->bit_size = 32; |
| *progress = true; |
| } |
| return true; |
| } |
| |
| static bool |
| lower_alu_instr(nir_builder *b, nir_alu_instr *alu) |
| { |
| const nir_op_info *op_info = &nir_op_infos[alu->op]; |
| |
| b->cursor = nir_before_instr(&alu->instr); |
| |
| /* Replacement SSA value */ |
| nir_ssa_def *rep = NULL; |
| switch (alu->op) { |
| case nir_op_mov: |
| case nir_op_vec2: |
| case nir_op_vec3: |
| case nir_op_vec4: |
| case nir_op_vec5: |
| case nir_op_vec8: |
| case nir_op_vec16: |
| if (alu->dest.dest.ssa.bit_size != 1) |
| return false; |
| /* These we expect to have booleans but the opcode doesn't change */ |
| break; |
| |
| case nir_op_b2f32: alu->op = nir_op_mov; break; |
| case nir_op_b2i32: alu->op = nir_op_mov; break; |
| case nir_op_f2b1: |
| case nir_op_i2b1: |
| rep = nir_sne(b, nir_ssa_for_alu_src(b, alu, 0), |
| nir_imm_float(b, 0)); |
| break; |
| case nir_op_b2b1: alu->op = nir_op_mov; break; |
| |
| case nir_op_flt: alu->op = nir_op_slt; break; |
| case nir_op_fge: alu->op = nir_op_sge; break; |
| case nir_op_feq: alu->op = nir_op_seq; break; |
| case nir_op_fneu: alu->op = nir_op_sne; break; |
| case nir_op_ilt: alu->op = nir_op_slt; break; |
| case nir_op_ige: alu->op = nir_op_sge; break; |
| case nir_op_ieq: alu->op = nir_op_seq; break; |
| case nir_op_ine: alu->op = nir_op_sne; break; |
| case nir_op_ult: alu->op = nir_op_slt; break; |
| case nir_op_uge: alu->op = nir_op_sge; break; |
| |
| case nir_op_ball_fequal2: alu->op = nir_op_fall_equal2; break; |
| case nir_op_ball_fequal3: alu->op = nir_op_fall_equal3; break; |
| case nir_op_ball_fequal4: alu->op = nir_op_fall_equal4; break; |
| case nir_op_bany_fnequal2: alu->op = nir_op_fany_nequal2; break; |
| case nir_op_bany_fnequal3: alu->op = nir_op_fany_nequal3; break; |
| case nir_op_bany_fnequal4: alu->op = nir_op_fany_nequal4; break; |
| case nir_op_ball_iequal2: alu->op = nir_op_fall_equal2; break; |
| case nir_op_ball_iequal3: alu->op = nir_op_fall_equal3; break; |
| case nir_op_ball_iequal4: alu->op = nir_op_fall_equal4; break; |
| case nir_op_bany_inequal2: alu->op = nir_op_fany_nequal2; break; |
| case nir_op_bany_inequal3: alu->op = nir_op_fany_nequal3; break; |
| case nir_op_bany_inequal4: alu->op = nir_op_fany_nequal4; break; |
| |
| case nir_op_bcsel: alu->op = nir_op_fcsel; break; |
| |
| case nir_op_iand: alu->op = nir_op_fmul; break; |
| case nir_op_ixor: alu->op = nir_op_sne; break; |
| case nir_op_ior: alu->op = nir_op_fmax; break; |
| |
| case nir_op_inot: |
| rep = nir_seq(b, nir_ssa_for_alu_src(b, alu, 0), |
| nir_imm_float(b, 0)); |
| break; |
| |
| default: |
| assert(alu->dest.dest.ssa.bit_size > 1); |
| for (unsigned i = 0; i < op_info->num_inputs; i++) |
| assert(alu->src[i].src.ssa->bit_size > 1); |
| return false; |
| } |
| |
| if (rep) { |
| /* We've emitted a replacement instruction */ |
| nir_ssa_def_rewrite_uses(&alu->dest.dest.ssa, rep); |
| nir_instr_remove(&alu->instr); |
| } else { |
| if (alu->dest.dest.ssa.bit_size == 1) |
| alu->dest.dest.ssa.bit_size = 32; |
| } |
| |
| return true; |
| } |
| |
| static bool |
| lower_tex_instr(nir_tex_instr *tex) |
| { |
| bool progress = false; |
| rewrite_1bit_ssa_def_to_32bit(&tex->dest.ssa, &progress); |
| if (tex->dest_type == nir_type_bool1) { |
| tex->dest_type = nir_type_bool32; |
| progress = true; |
| } |
| return progress; |
| } |
| |
| static bool |
| nir_lower_bool_to_float_instr(nir_builder *b, |
| nir_instr *instr, |
| UNUSED void *cb_data) |
| { |
| switch (instr->type) { |
| case nir_instr_type_alu: |
| return lower_alu_instr(b, nir_instr_as_alu(instr)); |
| |
| case nir_instr_type_load_const: { |
| nir_load_const_instr *load = nir_instr_as_load_const(instr); |
| if (load->def.bit_size == 1) { |
| nir_const_value *value = load->value; |
| for (unsigned i = 0; i < load->def.num_components; i++) |
| load->value[i].f32 = value[i].b ? 1.0 : 0.0; |
| load->def.bit_size = 32; |
| return true; |
| } |
| return false; |
| } |
| |
| case nir_instr_type_intrinsic: |
| case nir_instr_type_ssa_undef: |
| case nir_instr_type_phi: { |
| bool progress = false; |
| nir_foreach_ssa_def(instr, rewrite_1bit_ssa_def_to_32bit, &progress); |
| return progress; |
| } |
| |
| case nir_instr_type_tex: |
| return lower_tex_instr(nir_instr_as_tex(instr)); |
| |
| default: |
| nir_foreach_ssa_def(instr, assert_ssa_def_is_not_1bit, NULL); |
| return false; |
| } |
| } |
| |
| bool |
| nir_lower_bool_to_float(nir_shader *shader) |
| { |
| return nir_shader_instructions_pass(shader, nir_lower_bool_to_float_instr, |
| nir_metadata_block_index | |
| nir_metadata_dominance, |
| NULL); |
| } |