| /* |
| * Copyright (C) 2020 Google, Inc. |
| * |
| * 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" |
| |
| /* Lower mediump outputs to float16, int16, or uint16. */ |
| |
| void |
| nir_lower_mediump_outputs(nir_shader *nir) |
| { |
| nir_function_impl *impl = nir_shader_get_entrypoint(nir); |
| assert(impl); |
| |
| /* Get rid of old derefs before we change the types of the variables */ |
| nir_opt_dce(nir); |
| |
| nir_builder b; |
| nir_builder_init(&b, impl); |
| |
| nir_foreach_block_safe (block, impl) { |
| nir_foreach_instr_safe (instr, block) { |
| if (instr->type != nir_instr_type_intrinsic) |
| continue; |
| |
| nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr); |
| if (intr->intrinsic != nir_intrinsic_store_output) |
| continue; |
| |
| if (!nir_intrinsic_io_semantics(intr).medium_precision) |
| break; /* can't lower */ |
| |
| switch (nir_intrinsic_src_type(intr)) { |
| case nir_type_float32: |
| b.cursor = nir_before_instr(&intr->instr); |
| nir_instr_rewrite_src(&intr->instr, &intr->src[0], |
| nir_src_for_ssa(nir_f2f16(&b, intr->src[0].ssa))); |
| nir_intrinsic_set_src_type(intr, nir_type_float16); |
| break; |
| |
| case nir_type_int32: |
| b.cursor = nir_before_instr(&intr->instr); |
| nir_instr_rewrite_src(&intr->instr, &intr->src[0], |
| nir_src_for_ssa(nir_i2i16(&b, intr->src[0].ssa))); |
| nir_intrinsic_set_src_type(intr, nir_type_int16); |
| break; |
| |
| case nir_type_uint32: |
| b.cursor = nir_before_instr(&intr->instr); |
| nir_instr_rewrite_src(&intr->instr, &intr->src[0], |
| nir_src_for_ssa(nir_u2u16(&b, intr->src[0].ssa))); |
| nir_intrinsic_set_src_type(intr, nir_type_uint16); |
| break; |
| |
| default:; |
| } |
| } |
| } |
| } |