319 lines
8.8 KiB
C++
319 lines
8.8 KiB
C++
// 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::PrecF32:
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return "pf_";
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case GlslVarType::PrecF64:
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return "pd_";
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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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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::PhiDefine(IR::Inst& inst, IR::Type type) {
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return AddDefine(inst, RegType(type));
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}
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std::string VarAlloc::AddDefine(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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return "";
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}
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return Representation(inst.Definition<Id>());
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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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case GlslVarType::PrecF32:
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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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case GlslVarType::PrecF64:
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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);
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}
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}
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VarAlloc::UseTracker& VarAlloc::GetUseTracker(GlslVarType type) {
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switch (type) {
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case GlslVarType::U1:
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return var_bool;
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case GlslVarType::F16x2:
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return var_f16x2;
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case GlslVarType::U32:
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return var_u32;
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case GlslVarType::S32:
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return var_s32;
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case GlslVarType::F32:
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return var_f32;
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case GlslVarType::S64:
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return var_s64;
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case GlslVarType::U64:
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return var_u64;
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case GlslVarType::F64:
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return var_f64;
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case GlslVarType::U32x2:
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return var_u32x2;
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case GlslVarType::F32x2:
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return var_f32x2;
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case GlslVarType::U32x3:
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return var_u32x3;
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case GlslVarType::F32x3:
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return var_f32x3;
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case GlslVarType::U32x4:
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return var_u32x4;
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case GlslVarType::F32x4:
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return var_f32x4;
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case GlslVarType::PrecF32:
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return var_precf32;
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case GlslVarType::PrecF64:
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return var_precf64;
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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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const VarAlloc::UseTracker& VarAlloc::GetUseTracker(GlslVarType type) const {
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switch (type) {
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case GlslVarType::U1:
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return var_bool;
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case GlslVarType::F16x2:
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return var_f16x2;
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case GlslVarType::U32:
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return var_u32;
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case GlslVarType::S32:
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return var_s32;
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case GlslVarType::F32:
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return var_f32;
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case GlslVarType::S64:
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return var_s64;
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case GlslVarType::U64:
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return var_u64;
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case GlslVarType::F64:
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return var_f64;
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case GlslVarType::U32x2:
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return var_u32x2;
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case GlslVarType::F32x2:
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return var_f32x2;
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case GlslVarType::U32x3:
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return var_u32x3;
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case GlslVarType::F32x3:
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return var_f32x3;
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case GlslVarType::U32x4:
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return var_u32x4;
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case GlslVarType::F32x4:
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return var_f32x4;
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case GlslVarType::PrecF32:
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return var_precf32;
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case GlslVarType::PrecF64:
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return var_precf64;
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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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} // namespace Shader::Backend::GLSL
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