| /* |
| * Copyright © 2015 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" |
| |
| /* |
| * lowers: |
| * |
| * packDouble2x32(foo) -> packDouble2x32Split(foo.x, foo.y) |
| * unpackDouble2x32(foo) -> vec2(unpackDouble2x32_x(foo), unpackDouble2x32_y(foo)) |
| */ |
| |
| static nir_ssa_def * |
| lower_pack_double(nir_builder *b, nir_ssa_def *src) |
| { |
| return nir_pack_double_2x32_split(b, nir_channel(b, src, 0), |
| nir_channel(b, src, 1)); |
| } |
| |
| static nir_ssa_def * |
| lower_unpack_double(nir_builder *b, nir_ssa_def *src) |
| { |
| return nir_vec2(b, nir_unpack_double_2x32_split_x(b, src), |
| nir_unpack_double_2x32_split_y(b, src)); |
| } |
| |
| static void |
| lower_double_pack_impl(nir_function_impl *impl) |
| { |
| nir_builder b; |
| nir_builder_init(&b, impl); |
| |
| nir_foreach_block(block, impl) { |
| nir_foreach_instr_safe(instr, block) { |
| if (instr->type != nir_instr_type_alu) |
| continue; |
| |
| nir_alu_instr *alu_instr = (nir_alu_instr *) instr; |
| |
| if (alu_instr->op != nir_op_pack_double_2x32 && |
| alu_instr->op != nir_op_unpack_double_2x32) |
| continue; |
| |
| b.cursor = nir_before_instr(&alu_instr->instr); |
| |
| nir_ssa_def *src = nir_ssa_for_alu_src(&b, alu_instr, 0); |
| nir_ssa_def *dest = |
| alu_instr->op == nir_op_pack_double_2x32 ? |
| lower_pack_double(&b, src) : |
| lower_unpack_double(&b, src); |
| |
| nir_ssa_def_rewrite_uses(&alu_instr->dest.dest.ssa, nir_src_for_ssa(dest)); |
| nir_instr_remove(&alu_instr->instr); |
| } |
| } |
| } |
| |
| void |
| nir_lower_double_pack(nir_shader *shader) |
| { |
| nir_foreach_function(function, shader) { |
| if (function->impl) |
| lower_double_pack_impl(function->impl); |
| } |
| } |
| |