glsl: Rework variable allocator to allow for variable reuse
ameerj
parent
9ccbd74991
commit
1269a0cf8b
@ -1,191 +0,0 @@
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// Copyright 2021 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <string>
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#include <string_view>
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#include <fmt/format.h>
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#include "shader_recompiler/backend/glsl/reg_alloc.h"
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#include "shader_recompiler/exception.h"
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#include "shader_recompiler/frontend/ir/value.h"
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namespace Shader::Backend::GLSL {
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namespace {
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std::string Representation(Id id) {
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if (id.is_condition_code != 0) {
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throw NotImplementedException("Condition code");
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}
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if (id.is_spill != 0) {
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throw NotImplementedException("Spilling");
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}
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const u32 index{static_cast<u32>(id.index)};
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return fmt::format("R{}", index);
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}
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std::string FormatFloat(std::string_view value, IR::Type type) {
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// TODO: Confirm FP64 nan/inf
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if (type == IR::Type::F32) {
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if (value == "nan") {
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return "uintBitsToFloat(0x7fc00000)";
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}
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if (value == "inf") {
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return "uintBitsToFloat(0x7f800000)";
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}
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if (value == "-inf") {
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return "uintBitsToFloat(0xff800000)";
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}
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}
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if (value.find_first_of('e') != std::string_view::npos) {
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// scientific notation
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const auto cast{type == IR::Type::F32 ? "float" : "double"};
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return fmt::format("{}({})", cast, value);
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}
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const bool needs_dot{value.find_first_of('.') == std::string_view::npos};
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const bool needs_suffix{!value.ends_with('f')};
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const auto suffix{type == IR::Type::F32 ? "f" : "lf"};
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return fmt::format("{}{}{}", value, needs_dot ? "." : "", needs_suffix ? suffix : "");
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}
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std::string MakeImm(const IR::Value& value) {
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switch (value.Type()) {
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case IR::Type::U1:
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return fmt::format("{}", value.U1() ? "true" : "false");
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case IR::Type::U32:
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return fmt::format("{}u", value.U32());
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case IR::Type::F32:
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return FormatFloat(fmt::format("{}", value.F32()), IR::Type::F32);
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case IR::Type::U64:
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return fmt::format("{}ul", value.U64());
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case IR::Type::F64:
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return FormatFloat(fmt::format("{}", value.F64()), IR::Type::F64);
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case IR::Type::Void:
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return "";
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default:
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throw NotImplementedException("Immediate type {}", value.Type());
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}
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}
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} // Anonymous namespace
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std::string RegAlloc::Define(IR::Inst& inst) {
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const Id id{Alloc()};
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inst.SetDefinition<Id>(id);
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return Representation(id);
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}
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std::string RegAlloc::Define(IR::Inst& inst, Type type) {
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const Id id{Alloc()};
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std::string type_str = "";
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if (!register_defined[id.index]) {
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register_defined[id.index] = true;
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// type_str = GetGlslType(type);
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reg_types.push_back(GetGlslType(type));
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++num_used_registers;
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}
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inst.SetDefinition<Id>(id);
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return type_str + Representation(id);
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}
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std::string RegAlloc::Define(IR::Inst& inst, IR::Type type) {
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return Define(inst, RegType(type));
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}
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std::string RegAlloc::Consume(const IR::Value& value) {
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return value.IsImmediate() ? MakeImm(value) : Consume(*value.InstRecursive());
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}
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std::string RegAlloc::Consume(IR::Inst& inst) {
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inst.DestructiveRemoveUsage();
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// TODO: reuse variables of same type if possible
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// if (!inst.HasUses()) {
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// Free(id);
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// }
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return Representation(inst.Definition<Id>());
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}
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Type RegAlloc::RegType(IR::Type type) {
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switch (type) {
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case IR::Type::U1:
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return Type::U1;
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case IR::Type::U32:
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return Type::U32;
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case IR::Type::F32:
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return Type::F32;
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case IR::Type::U64:
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return Type::U64;
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case IR::Type::F64:
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return Type::F64;
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default:
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throw NotImplementedException("IR type {}", type);
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}
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}
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std::string RegAlloc::GetGlslType(Type type) {
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switch (type) {
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case Type::U1:
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return "bool ";
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case Type::F16x2:
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return "f16vec2 ";
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case Type::U32:
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return "uint ";
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case Type::S32:
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return "int ";
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case Type::F32:
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return "float ";
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case Type::S64:
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return "int64_t ";
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case Type::U64:
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return "uint64_t ";
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case Type::F64:
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return "double ";
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case Type::U32x2:
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return "uvec2 ";
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case Type::F32x2:
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return "vec2 ";
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case Type::U32x3:
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return "uvec3 ";
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case Type::F32x3:
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return "vec3 ";
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case Type::U32x4:
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return "uvec4 ";
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case Type::F32x4:
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return "vec4 ";
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case Type::Void:
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return "";
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default:
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throw NotImplementedException("Type {}", type);
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}
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}
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std::string RegAlloc::GetGlslType(IR::Type type) {
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return GetGlslType(RegType(type));
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}
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Id RegAlloc::Alloc() {
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if (num_used_registers < NUM_REGS) {
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for (size_t reg = 0; reg < NUM_REGS; ++reg) {
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if (register_use[reg]) {
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continue;
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}
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register_use[reg] = true;
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Id ret{};
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ret.is_valid.Assign(1);
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ret.is_long.Assign(0);
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ret.is_spill.Assign(0);
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ret.is_condition_code.Assign(0);
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ret.index.Assign(static_cast<u32>(reg));
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return ret;
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}
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}
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throw NotImplementedException("Register spilling");
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}
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void RegAlloc::Free(Id id) {
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if (id.is_spill != 0) {
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throw NotImplementedException("Free spill");
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}
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register_use[id.index] = false;
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}
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} // namespace Shader::Backend::GLSL
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@ -1,84 +0,0 @@
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// Copyright 2021 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <bitset>
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#include <vector>
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#include "common/bit_field.h"
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#include "common/common_types.h"
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namespace Shader::IR {
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class Inst;
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class Value;
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enum class Type;
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} // namespace Shader::IR
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namespace Shader::Backend::GLSL {
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enum class Type : u32 {
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U1,
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F16x2,
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S32,
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U32,
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F32,
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S64,
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U64,
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F64,
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U32x2,
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F32x2,
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U32x3,
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F32x3,
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U32x4,
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F32x4,
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Void,
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};
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struct Id {
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union {
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u32 raw;
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BitField<0, 1, u32> is_valid;
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BitField<1, 1, u32> is_long;
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BitField<2, 1, u32> is_spill;
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BitField<3, 1, u32> is_condition_code;
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BitField<4, 1, u32> is_null;
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BitField<5, 27, u32> index;
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};
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bool operator==(Id rhs) const noexcept {
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return raw == rhs.raw;
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}
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bool operator!=(Id rhs) const noexcept {
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return !operator==(rhs);
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}
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};
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static_assert(sizeof(Id) == sizeof(u32));
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class RegAlloc {
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public:
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std::string Define(IR::Inst& inst);
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std::string Define(IR::Inst& inst, Type type);
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std::string Define(IR::Inst& inst, IR::Type type);
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std::string Consume(const IR::Value& value);
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std::string Consume(IR::Inst& inst);
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std::string GetGlslType(Type type);
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std::string GetGlslType(IR::Type type);
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size_t num_used_registers{};
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std::vector<std::string> reg_types;
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private:
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static constexpr size_t NUM_REGS = 4096;
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Type RegType(IR::Type type);
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Id Alloc();
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void Free(Id id);
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std::bitset<NUM_REGS> register_use{};
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std::bitset<NUM_REGS> register_defined{};
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};
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} // namespace Shader::Backend::GLSL
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@ -0,0 +1,290 @@
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// Copyright 2021 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <string>
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#include <string_view>
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#include <fmt/format.h>
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#include "shader_recompiler/backend/glsl/var_alloc.h"
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#include "shader_recompiler/exception.h"
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#include "shader_recompiler/frontend/ir/value.h"
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namespace Shader::Backend::GLSL {
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namespace {
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std::string TypePrefix(GlslVarType type) {
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switch (type) {
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case GlslVarType::U1:
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return "b_";
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case GlslVarType::F16x2:
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return "f16x2_";
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case GlslVarType::U32:
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return "u_";
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case GlslVarType::S32:
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return "s_";
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case GlslVarType::F32:
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return "f_";
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case GlslVarType::S64:
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return "s64_";
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case GlslVarType::U64:
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return "u64_";
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case GlslVarType::F64:
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return "d_";
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case GlslVarType::U32x2:
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return "u2_";
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case GlslVarType::F32x2:
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return "f2_";
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case GlslVarType::U32x3:
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return "u3_";
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case GlslVarType::F32x3:
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return "f3_";
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case GlslVarType::U32x4:
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return "u4_";
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case GlslVarType::F32x4:
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return "f4_";
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case GlslVarType::Void:
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return "";
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default:
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throw NotImplementedException("Type {}", type);
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}
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}
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std::string FormatFloat(std::string_view value, IR::Type type) {
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// TODO: Confirm FP64 nan/inf
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if (type == IR::Type::F32) {
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if (value == "nan") {
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return "uintBitsToFloat(0x7fc00000)";
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}
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if (value == "inf") {
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return "uintBitsToFloat(0x7f800000)";
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}
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if (value == "-inf") {
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return "uintBitsToFloat(0xff800000)";
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}
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}
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if (value.find_first_of('e') != std::string_view::npos) {
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// scientific notation
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const auto cast{type == IR::Type::F32 ? "float" : "double"};
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return fmt::format("{}({})", cast, value);
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}
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const bool needs_dot{value.find_first_of('.') == std::string_view::npos};
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const bool needs_suffix{!value.ends_with('f')};
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const auto suffix{type == IR::Type::F32 ? "f" : "lf"};
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return fmt::format("{}{}{}", value, needs_dot ? "." : "", needs_suffix ? suffix : "");
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}
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std::string MakeImm(const IR::Value& value) {
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switch (value.Type()) {
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case IR::Type::U1:
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return fmt::format("{}", value.U1() ? "true" : "false");
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case IR::Type::U32:
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return fmt::format("{}u", value.U32());
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case IR::Type::F32:
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return FormatFloat(fmt::format("{}", value.F32()), IR::Type::F32);
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case IR::Type::U64:
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return fmt::format("{}ul", value.U64());
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case IR::Type::F64:
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return FormatFloat(fmt::format("{}", value.F64()), IR::Type::F64);
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case IR::Type::Void:
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return "";
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default:
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throw NotImplementedException("Immediate type {}", value.Type());
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}
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}
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} // Anonymous namespace
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std::string VarAlloc::Representation(u32 index, GlslVarType type) const {
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const auto prefix{TypePrefix(type)};
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return fmt::format("{}{}", prefix, index);
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}
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std::string VarAlloc::Representation(Id id) const {
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return Representation(id.index, id.type);
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}
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std::string VarAlloc::Define(IR::Inst& inst, GlslVarType type) {
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if (inst.HasUses()) {
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inst.SetDefinition<Id>(Alloc(type));
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return Representation(inst.Definition<Id>());
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} else {
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Id id{};
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id.type.Assign(type);
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// id.is_null.Assign(1);
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GetUseTracker(type).uses_temp = true;
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inst.SetDefinition<Id>(id);
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}
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return Representation(inst.Definition<Id>());
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}
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std::string VarAlloc::Define(IR::Inst& inst, IR::Type type) {
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return Define(inst, RegType(type));
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}
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std::string VarAlloc::Consume(const IR::Value& value) {
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return value.IsImmediate() ? MakeImm(value) : ConsumeInst(*value.InstRecursive());
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}
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std::string VarAlloc::ConsumeInst(IR::Inst& inst) {
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inst.DestructiveRemoveUsage();
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if (!inst.HasUses()) {
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Free(inst.Definition<Id>());
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}
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return Representation(inst.Definition<Id>());
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}
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std::string VarAlloc::GetGlslType(IR::Type type) const {
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return GetGlslType(RegType(type));
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}
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Id VarAlloc::Alloc(GlslVarType type) {
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auto& use_tracker{GetUseTracker(type)};
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if (use_tracker.num_used < NUM_VARS) {
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for (size_t var = 1; var < NUM_VARS; ++var) {
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if (use_tracker.var_use[var]) {
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continue;
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}
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use_tracker.num_used = std::max(use_tracker.num_used, var + 1);
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use_tracker.var_use[var] = true;
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Id ret{};
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ret.is_valid.Assign(1);
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ret.type.Assign(type);
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ret.index.Assign(static_cast<u32>(var));
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return ret;
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}
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}
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throw NotImplementedException("Variable spilling");
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}
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void VarAlloc::Free(Id id) {
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if (id.is_valid == 0) {
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// throw LogicError("Freeing invalid variable");
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return;
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}
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auto& use_tracker{GetUseTracker(id.type)};
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use_tracker.var_use[id.index] = false;
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}
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GlslVarType VarAlloc::RegType(IR::Type type) const {
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switch (type) {
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case IR::Type::U1:
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return GlslVarType::U1;
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case IR::Type::U32:
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return GlslVarType::U32;
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case IR::Type::F32:
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return GlslVarType::F32;
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case IR::Type::U64:
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return GlslVarType::U64;
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case IR::Type::F64:
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return GlslVarType::F64;
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default:
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throw NotImplementedException("IR type {}", type);
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}
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}
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std::string VarAlloc::GetGlslType(GlslVarType type) const {
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switch (type) {
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case GlslVarType::U1:
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return "bool ";
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case GlslVarType::F16x2:
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return "f16vec2 ";
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case GlslVarType::U32:
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return "uint ";
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case GlslVarType::S32:
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return "int ";
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case GlslVarType::F32:
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return "float ";
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case GlslVarType::S64:
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return "int64_t ";
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case GlslVarType::U64:
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return "uint64_t ";
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case GlslVarType::F64:
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return "double ";
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case GlslVarType::U32x2:
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return "uvec2 ";
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case GlslVarType::F32x2:
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return "vec2 ";
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case GlslVarType::U32x3:
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return "uvec3 ";
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case GlslVarType::F32x3:
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return "vec3 ";
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case GlslVarType::U32x4:
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return "uvec4 ";
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case GlslVarType::F32x4:
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return "vec4 ";
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case GlslVarType::Void:
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return "";
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default:
|
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throw NotImplementedException("Type {}", type);
|
||||
}
|
||||
}
|
||||
|
||||
VarAlloc::UseTracker& VarAlloc::GetUseTracker(GlslVarType type) {
|
||||
switch (type) {
|
||||
case GlslVarType::U1:
|
||||
return var_bool;
|
||||
case GlslVarType::U32:
|
||||
return var_u32;
|
||||
case GlslVarType::S32:
|
||||
return var_s32;
|
||||
case GlslVarType::F32:
|
||||
return var_f32;
|
||||
case GlslVarType::S64:
|
||||
return var_s64;
|
||||
case GlslVarType::U64:
|
||||
return var_u64;
|
||||
case GlslVarType::F64:
|
||||
return var_f64;
|
||||
case GlslVarType::U32x2:
|
||||
return var_u32x2;
|
||||
case GlslVarType::F32x2:
|
||||
return var_f32x2;
|
||||
case GlslVarType::U32x3:
|
||||
return var_u32x3;
|
||||
case GlslVarType::F32x3:
|
||||
return var_f32x3;
|
||||
case GlslVarType::U32x4:
|
||||
return var_u32x4;
|
||||
case GlslVarType::F32x4:
|
||||
return var_f32x4;
|
||||
default:
|
||||
throw NotImplementedException("Type {}", type);
|
||||
}
|
||||
}
|
||||
|
||||
const VarAlloc::UseTracker& VarAlloc::GetUseTracker(GlslVarType type) const {
|
||||
switch (type) {
|
||||
case GlslVarType::U1:
|
||||
return var_bool;
|
||||
case GlslVarType::F16x2:
|
||||
return var_f16x2;
|
||||
case GlslVarType::U32:
|
||||
return var_u32;
|
||||
case GlslVarType::S32:
|
||||
return var_s32;
|
||||
case GlslVarType::F32:
|
||||
return var_f32;
|
||||
case GlslVarType::S64:
|
||||
return var_s64;
|
||||
case GlslVarType::U64:
|
||||
return var_u64;
|
||||
case GlslVarType::F64:
|
||||
return var_f64;
|
||||
case GlslVarType::U32x2:
|
||||
return var_u32x2;
|
||||
case GlslVarType::F32x2:
|
||||
return var_f32x2;
|
||||
case GlslVarType::U32x3:
|
||||
return var_u32x3;
|
||||
case GlslVarType::F32x3:
|
||||
return var_f32x3;
|
||||
case GlslVarType::U32x4:
|
||||
return var_u32x4;
|
||||
case GlslVarType::F32x4:
|
||||
return var_f32x4;
|
||||
default:
|
||||
throw NotImplementedException("Type {}", type);
|
||||
}
|
||||
}
|
||||
|
||||
} // namespace Shader::Backend::GLSL
|
||||
@ -0,0 +1,100 @@
|
||||
// Copyright 2021 yuzu Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <bitset>
|
||||
#include <string>
|
||||
#include <vector>
|
||||
|
||||
#include "common/bit_field.h"
|
||||
#include "common/common_types.h"
|
||||
|
||||
namespace Shader::IR {
|
||||
class Inst;
|
||||
class Value;
|
||||
enum class Type;
|
||||
} // namespace Shader::IR
|
||||
|
||||
namespace Shader::Backend::GLSL {
|
||||
enum class GlslVarType : u32 {
|
||||
U1,
|
||||
F16x2,
|
||||
S32,
|
||||
U32,
|
||||
F32,
|
||||
S64,
|
||||
U64,
|
||||
F64,
|
||||
U32x2,
|
||||
F32x2,
|
||||
U32x3,
|
||||
F32x3,
|
||||
U32x4,
|
||||
F32x4,
|
||||
Void,
|
||||
};
|
||||
|
||||
struct Id {
|
||||
union {
|
||||
u32 raw;
|
||||
BitField<0, 1, u32> is_valid;
|
||||
BitField<1, 4, GlslVarType> type;
|
||||
BitField<5, 27, u32> index;
|
||||
};
|
||||
|
||||
bool operator==(Id rhs) const noexcept {
|
||||
return raw == rhs.raw;
|
||||
}
|
||||
bool operator!=(Id rhs) const noexcept {
|
||||
return !operator==(rhs);
|
||||
}
|
||||
};
|
||||
static_assert(sizeof(Id) == sizeof(u32));
|
||||
|
||||
class VarAlloc {
|
||||
public:
|
||||
static constexpr size_t NUM_VARS = 511;
|
||||
struct UseTracker {
|
||||
size_t num_used{};
|
||||
std::bitset<NUM_VARS> var_use{};
|
||||
bool uses_temp{};
|
||||
};
|
||||
|
||||
std::string Define(IR::Inst& inst, GlslVarType type);
|
||||
std::string Define(IR::Inst& inst, IR::Type type);
|
||||
|
||||
std::string Consume(const IR::Value& value);
|
||||
std::string ConsumeInst(IR::Inst& inst);
|
||||
|
||||
std::string GetGlslType(GlslVarType type) const;
|
||||
std::string GetGlslType(IR::Type type) const;
|
||||
|
||||
const UseTracker& GetUseTracker(GlslVarType type) const;
|
||||
std::string Representation(u32 index, GlslVarType type) const;
|
||||
|
||||
private:
|
||||
GlslVarType RegType(IR::Type type) const;
|
||||
Id Alloc(GlslVarType type);
|
||||
void Free(Id id);
|
||||
UseTracker& GetUseTracker(GlslVarType type);
|
||||
std::string Representation(Id id) const;
|
||||
|
||||
UseTracker var_bool{};
|
||||
UseTracker var_f16x2{};
|
||||
UseTracker var_s32{};
|
||||
UseTracker var_u32{};
|
||||
UseTracker var_u32x2{};
|
||||
UseTracker var_u32x3{};
|
||||
UseTracker var_u32x4{};
|
||||
UseTracker var_f32{};
|
||||
UseTracker var_f32x2{};
|
||||
UseTracker var_f32x3{};
|
||||
UseTracker var_f32x4{};
|
||||
UseTracker var_u64{};
|
||||
UseTracker var_s64{};
|
||||
UseTracker var_f64{};
|
||||
};
|
||||
|
||||
} // namespace Shader::Backend::GLSL
|
||||
Loading…
Reference in New Issue