mirror of https://gitlab.freedesktop.org/mesa/mesa
97 lines
3.1 KiB
C
97 lines
3.1 KiB
C
/*
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* Copyright (C) 2020 Collabora, Ltd.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors (Collabora):
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* Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
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*/
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/* Fuses f2f16 modifiers into loads */
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#include "compiler/nir/nir.h"
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#include "compiler/nir/nir_builder.h"
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#include "panfrost/util/pan_ir.h"
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bool nir_fuse_io_16(nir_shader *shader);
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static bool
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nir_src_is_f2fmp(nir_src *use)
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{
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nir_instr *parent = nir_src_parent_instr(use);
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if (parent->type != nir_instr_type_alu)
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return false;
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nir_alu_instr *alu = nir_instr_as_alu(parent);
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return (alu->op == nir_op_f2fmp);
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}
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bool
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nir_fuse_io_16(nir_shader *shader)
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{
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bool progress = false;
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nir_foreach_function_impl(impl, shader) {
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nir_foreach_block(block, impl) {
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nir_foreach_instr_safe(instr, block) {
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if (instr->type != nir_instr_type_intrinsic)
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continue;
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nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr);
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if (intr->intrinsic != nir_intrinsic_load_interpolated_input)
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continue;
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if (intr->def.bit_size != 32)
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continue;
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/* We swizzle at a 32-bit level so need a multiple of 2. We could
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* do a bit better and handle even components though */
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if (nir_intrinsic_component(intr))
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continue;
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bool valid = true;
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nir_foreach_use_including_if(src, &intr->def)
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valid &= !nir_src_is_if(src) && nir_src_is_f2fmp(src);
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if (!valid)
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continue;
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intr->def.bit_size = 16;
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nir_builder b = nir_builder_at(nir_after_instr(instr));
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/* The f2f32(f2fmp(x)) will cancel by opt_algebraic */
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nir_def *conv = nir_f2f32(&b, &intr->def);
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nir_def_rewrite_uses_after(&intr->def, conv, conv->parent_instr);
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progress |= true;
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}
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}
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nir_metadata_preserve(impl,
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nir_metadata_block_index | nir_metadata_dominance);
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}
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return progress;
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}
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