mirror of
https://github.com/KhronosGroup/SPIRV-Tools
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250a235a8d
Add new "short descriptor" algorithm to MARK-V codec. Add three shader compression models: lite - fast, poor compression mid - balanced max - best compression
101 lines
3.5 KiB
C++
101 lines
3.5 KiB
C++
// Copyright (c) 2017 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "markv_model_shader.h"
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#include <algorithm>
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#include <map>
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#include <memory>
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#include <unordered_map>
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#include <unordered_set>
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#include <vector>
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using spvutils::HuffmanCodec;
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namespace spvtools {
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namespace {
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// Signals that the value is not in the coding scheme and a fallback method
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// needs to be used.
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const uint64_t kMarkvNoneOfTheAbove = MarkvModel::GetMarkvNoneOfTheAbove();
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inline uint32_t CombineOpcodeAndNumOperands(uint32_t opcode,
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uint32_t num_operands) {
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return opcode | (num_operands << 16);
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}
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// The following file contains autogenerated statistical coding rules.
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// Can be generated by running spirv-stats on representative corpus of shaders
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// with flags:
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// --codegen_opcode_and_num_operands_hist
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// --codegen_opcode_and_num_operands_markov_huffman_codecs
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// --codegen_literal_string_huffman_codecs
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// --codegen_non_id_word_huffman_codecs
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// --codegen_id_descriptor_huffman_codecs
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//
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// Example:
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// find <SHADER_CORPUS_DIR> -type f -print0 | xargs -0 -s 2000000
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// ~/SPIRV-Tools/build/tools/spirv-stats -v
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// --codegen_opcode_and_num_operands_hist
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// --codegen_opcode_and_num_operands_markov_huffman_codecs
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// --codegen_literal_string_huffman_codecs --codegen_non_id_word_huffman_codecs
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// --codegen_id_descriptor_huffman_codecs -o
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// ~/SPIRV-Tools/source/comp/markv_autogen.inc
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#include "markv_model_shader_default_autogen.inc"
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} // namespace
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MarkvModelShaderLite::MarkvModelShaderLite() {
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const uint16_t kVersionNumber = 1;
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SetModelVersion(kVersionNumber);
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opcode_and_num_operands_huffman_codec_.reset(
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new HuffmanCodec<uint64_t>(GetOpcodeAndNumOperandsHist()));
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id_fallback_strategy_ = IdFallbackStrategy::kShortDescriptor;
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}
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MarkvModelShaderMid::MarkvModelShaderMid() {
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const uint16_t kVersionNumber = 1;
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SetModelVersion(kVersionNumber);
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opcode_and_num_operands_huffman_codec_.reset(
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new HuffmanCodec<uint64_t>(GetOpcodeAndNumOperandsHist()));
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non_id_word_huffman_codecs_ = GetNonIdWordHuffmanCodecs();
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id_descriptor_huffman_codecs_ = GetIdDescriptorHuffmanCodecs();
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descriptors_with_coding_scheme_ = GetDescriptorsWithCodingScheme();
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literal_string_huffman_codecs_ = GetLiteralStringHuffmanCodecs();
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id_fallback_strategy_ = IdFallbackStrategy::kShortDescriptor;
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}
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MarkvModelShaderMax::MarkvModelShaderMax() {
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const uint16_t kVersionNumber = 1;
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SetModelVersion(kVersionNumber);
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opcode_and_num_operands_huffman_codec_.reset(
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new HuffmanCodec<uint64_t>(GetOpcodeAndNumOperandsHist()));
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opcode_and_num_operands_markov_huffman_codecs_ =
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GetOpcodeAndNumOperandsMarkovHuffmanCodecs();
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non_id_word_huffman_codecs_ = GetNonIdWordHuffmanCodecs();
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id_descriptor_huffman_codecs_ = GetIdDescriptorHuffmanCodecs();
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descriptors_with_coding_scheme_ = GetDescriptorsWithCodingScheme();
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literal_string_huffman_codecs_ = GetLiteralStringHuffmanCodecs();
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id_fallback_strategy_ = IdFallbackStrategy::kRuleBased;
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}
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} // namespace spvtools
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