| /* |
| * Copyright © 2018 Intel Corporation |
| * Copyright © 2019 Vasily Khoruzhick <anarsoul@gmail.com> |
| * |
| * 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_int(nir_ssa_def *def, void *arg) |
| { |
| ASSERTED BITSET_WORD *int_types = arg; |
| assert(!BITSET_TEST(int_types, def->index)); |
| return true; |
| } |
| |
| static bool |
| lower_alu_instr(nir_builder *b, nir_alu_instr *alu) |
| { |
| const nir_op_info *info = &nir_op_infos[alu->op]; |
| |
| bool is_bool_only = alu->dest.dest.ssa.bit_size == 1; |
| for (unsigned i = 0; i < info->num_inputs; i++) { |
| if (alu->src[i].src.ssa->bit_size != 1) |
| is_bool_only = false; |
| } |
| |
| if (is_bool_only) { |
| /* avoid lowering integers ops are used for booleans (ieq,ine,etc) */ |
| return false; |
| } |
| |
| /* 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_bcsel: |
| /* These we expect to have integers but the opcode doesn't change */ |
| break; |
| |
| case nir_op_b2i32: alu->op = nir_op_b2f32; break; |
| case nir_op_i2f32: alu->op = nir_op_mov; break; |
| case nir_op_u2f32: alu->op = nir_op_mov; break; |
| case nir_op_f2i32: alu->op = nir_op_ftrunc; break; |
| case nir_op_f2u32: alu->op = nir_op_ffloor; break; |
| case nir_op_i2b1: alu->op = nir_op_f2b1; break; |
| |
| case nir_op_ilt: alu->op = nir_op_flt; break; |
| case nir_op_ige: alu->op = nir_op_fge; break; |
| case nir_op_ieq: alu->op = nir_op_feq; break; |
| case nir_op_ine: alu->op = nir_op_fneu; break; |
| case nir_op_ult: alu->op = nir_op_flt; break; |
| case nir_op_uge: alu->op = nir_op_fge; break; |
| |
| case nir_op_iadd: alu->op = nir_op_fadd; break; |
| case nir_op_isub: alu->op = nir_op_fsub; break; |
| case nir_op_imul: alu->op = nir_op_fmul; break; |
| case nir_op_idiv: |
| rep = nir_ftrunc(b, nir_fdiv(b, |
| nir_ssa_for_alu_src(b, alu, 0), |
| nir_ssa_for_alu_src(b, alu, 1))); |
| break; |
| case nir_op_iabs: alu->op = nir_op_fabs; break; |
| case nir_op_ineg: alu->op = nir_op_fneg; break; |
| case nir_op_imax: alu->op = nir_op_fmax; break; |
| case nir_op_imin: alu->op = nir_op_fmin; break; |
| case nir_op_umax: alu->op = nir_op_fmax; break; |
| case nir_op_umin: alu->op = nir_op_fmin; break; |
| |
| case nir_op_ball_iequal2: alu->op = nir_op_ball_fequal2; break; |
| case nir_op_ball_iequal3: alu->op = nir_op_ball_fequal3; break; |
| case nir_op_ball_iequal4: alu->op = nir_op_ball_fequal4; break; |
| case nir_op_bany_inequal2: alu->op = nir_op_bany_fnequal2; break; |
| case nir_op_bany_inequal3: alu->op = nir_op_bany_fnequal3; break; |
| case nir_op_bany_inequal4: alu->op = nir_op_bany_fnequal4; break; |
| |
| default: |
| assert(nir_alu_type_get_base_type(info->output_type) != nir_type_int && |
| nir_alu_type_get_base_type(info->output_type) != nir_type_uint); |
| for (unsigned i = 0; i < info->num_inputs; i++) { |
| assert(nir_alu_type_get_base_type(info->input_types[i]) != nir_type_int && |
| nir_alu_type_get_base_type(info->input_types[i]) != nir_type_uint); |
| } |
| return false; |
| } |
| |
| if (rep) { |
| /* We've emitted a replacement instruction */ |
| nir_ssa_def_rewrite_uses(&alu->dest.dest.ssa, nir_src_for_ssa(rep)); |
| nir_instr_remove(&alu->instr); |
| } |
| |
| return true; |
| } |
| |
| static bool |
| nir_lower_int_to_float_impl(nir_function_impl *impl) |
| { |
| bool progress = false; |
| BITSET_WORD *float_types = NULL, *int_types = NULL; |
| |
| nir_builder b; |
| nir_builder_init(&b, impl); |
| |
| nir_index_ssa_defs(impl); |
| float_types = calloc(BITSET_WORDS(impl->ssa_alloc), |
| sizeof(BITSET_WORD)); |
| int_types = calloc(BITSET_WORDS(impl->ssa_alloc), |
| sizeof(BITSET_WORD)); |
| nir_gather_ssa_types(impl, float_types, int_types); |
| |
| nir_foreach_block(block, impl) { |
| nir_foreach_instr_safe(instr, block) { |
| switch (instr->type) { |
| case nir_instr_type_alu: |
| progress |= lower_alu_instr(&b, nir_instr_as_alu(instr)); |
| break; |
| |
| case nir_instr_type_load_const: { |
| nir_load_const_instr *load = nir_instr_as_load_const(instr); |
| if (load->def.bit_size != 1 && BITSET_TEST(int_types, load->def.index)) { |
| for (unsigned i = 0; i < load->def.num_components; i++) |
| load->value[i].f32 = load->value[i].i32; |
| } |
| break; |
| } |
| |
| case nir_instr_type_intrinsic: |
| case nir_instr_type_ssa_undef: |
| case nir_instr_type_phi: |
| case nir_instr_type_tex: |
| break; |
| |
| default: |
| nir_foreach_ssa_def(instr, assert_ssa_def_is_not_int, (void *)int_types); |
| break; |
| } |
| } |
| } |
| |
| if (progress) { |
| nir_metadata_preserve(impl, nir_metadata_block_index | |
| nir_metadata_dominance); |
| } |
| |
| free(float_types); |
| free(int_types); |
| |
| return progress; |
| } |
| |
| bool |
| nir_lower_int_to_float(nir_shader *shader) |
| { |
| bool progress = false; |
| |
| nir_foreach_function(function, shader) { |
| if (function->impl && nir_lower_int_to_float_impl(function->impl)) |
| progress = true; |
| } |
| |
| return progress; |
| } |