1/* 2 * Copyright © 2015 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 25#include "nir.h" 26#include "nir_builder.h" 27 28/* 29 * lowers: 30 * 31 * packDouble2x32(foo) -> packDouble2x32Split(foo.x, foo.y) 32 * unpackDouble2x32(foo) -> vec2(unpackDouble2x32_x(foo), unpackDouble2x32_y(foo)) 33 */ 34 35static nir_ssa_def * 36lower_pack_double(nir_builder *b, nir_ssa_def *src) 37{ 38 return nir_pack_double_2x32_split(b, nir_channel(b, src, 0), 39 nir_channel(b, src, 1)); 40} 41 42static nir_ssa_def * 43lower_unpack_double(nir_builder *b, nir_ssa_def *src) 44{ 45 return nir_vec2(b, nir_unpack_double_2x32_split_x(b, src), 46 nir_unpack_double_2x32_split_y(b, src)); 47} 48 49static void 50lower_double_pack_impl(nir_function_impl *impl) 51{ 52 nir_builder b; 53 nir_builder_init(&b, impl); 54 55 nir_foreach_block(block, impl) { 56 nir_foreach_instr_safe(instr, block) { 57 if (instr->type != nir_instr_type_alu) 58 continue; 59 60 nir_alu_instr *alu_instr = (nir_alu_instr *) instr; 61 62 if (alu_instr->op != nir_op_pack_double_2x32 && 63 alu_instr->op != nir_op_unpack_double_2x32) 64 continue; 65 66 b.cursor = nir_before_instr(&alu_instr->instr); 67 68 nir_ssa_def *src = nir_ssa_for_alu_src(&b, alu_instr, 0); 69 nir_ssa_def *dest = 70 alu_instr->op == nir_op_pack_double_2x32 ? 71 lower_pack_double(&b, src) : 72 lower_unpack_double(&b, src); 73 74 nir_ssa_def_rewrite_uses(&alu_instr->dest.dest.ssa, nir_src_for_ssa(dest)); 75 nir_instr_remove(&alu_instr->instr); 76 } 77 } 78} 79 80void 81nir_lower_double_pack(nir_shader *shader) 82{ 83 nir_foreach_function(function, shader) { 84 if (function->impl) 85 lower_double_pack_impl(function->impl); 86 } 87} 88 89