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// SPDX-License-Identifier: GPL-3.0-or-later
#include "TableGenBackends.h"
#include <cstdint>
#include <ostream>
#include <ranges>
#include <span>
#include <sstream>
#include <string>
#include <string_view>
#include <unordered_set>
namespace rcc::targetgen {
namespace {
void emitRegisterIDList(std::ostream &Output, const NormalizedTargetModel &Model,
std::span<const std::uint32_t> IDs) {
for (const std::uint32_t ID : IDs)
Output << "PhysicalRegisterID::" << findRegister(Model, ID).Symbol << ", ";
}
} // namespace
[[nodiscard]] std::string emitRegisterHeader(const NormalizedTargetModel &Model,
std::string_view SourceName) {
const std::string Guard = "RCC_TARGET_" + upperIdentifier(Model.Target.Namespace) + "_" +
upperIdentifier(Model.Target.Name) + "REGISTERS_H";
std::ostringstream Output;
Output << "// SPDX-License-Identifier: GPL-3.0-or-later\n\n";
Output << "// This file is generated by rcc-tblgen from ";
appendQuoted(Output, SourceName);
Output << ". Do not edit it manually.\n\n";
Output << "#ifndef " << Guard << "\n#define " << Guard << "\n\n";
Output << "#include <cstdint>\n#include <string_view>\n\n";
Output << "namespace rcc::" << Model.Target.Namespace << " {\n\n";
Output << "inline constexpr std::string_view TargetName = ";
appendQuoted(Output, Model.Target.Name);
Output << ";\ninline constexpr std::string_view TargetTriple = ";
appendQuoted(Output, Model.Target.Triple);
Output << ";\ninline constexpr std::string_view TargetCPU = ";
appendQuoted(Output, Model.Target.CPU);
Output << ";\ninline constexpr std::string_view TargetABI = ";
appendQuoted(Output, Model.Target.ABI);
Output << ";\ninline constexpr std::string_view TargetDataLayout = ";
appendQuoted(Output, Model.Target.DataLayout);
Output << ";\n\ninline constexpr std::string_view TargetFeatures[] = {\n";
for (const std::string &Feature : Model.Target.Features) {
Output << " ";
appendQuoted(Output, Feature);
Output << ",\n";
}
Output << "};\n\n";
Output << "enum class PhysicalRegisterID : std::uint32_t {\n NoRegister = 0,\n";
for (const NormalizedRegister &Register : Model.Registers)
Output << " " << Register.Symbol << " = " << Register.ID << ",\n";
Output << "};\n\n";
Output << "enum class RegisterUnit : std::uint32_t {\n";
for (const SourceRegisterUnit &Unit : Model.RegisterUnits)
Output << " " << Unit.Symbol << " = " << Unit.ID << ",\n";
Output << "};\n\n";
Output << "enum class RegisterBank : std::uint32_t {\n";
for (const NormalizedRegisterBank &Bank : Model.RegisterBanks)
Output << " " << Bank.Symbol << " = " << Bank.ID << ",\n";
Output << "};\n\n";
Output << "enum class RegisterClass : std::uint32_t {\n";
for (const NormalizedRegisterClass &Class : Model.RegisterClasses)
Output << " " << Class.Symbol << " = " << Class.ID << ",\n";
Output << "};\n\n";
Output << "} // namespace rcc::" << Model.Target.Namespace << "\n\n";
Output << "#endif // " << Guard << "\n";
return Output.str();
}
std::string emitRegisterInfo(const NormalizedTargetModel &Model, std::string_view SourceName) {
std::ostringstream Output;
Output << "// SPDX-License-Identifier: GPL-3.0-or-later\n\n";
Output << "// This file is generated by rcc-tblgen from ";
appendQuoted(Output, SourceName);
Output << ". Do not edit it manually.\n\n";
Output << "void appendGeneratedRegisterInfo(TargetRegisterInfoDesc &Description) {\n";
Output << " Description.RegisterUnits = {\n";
for (const SourceRegisterUnit &Unit : Model.RegisterUnits) {
Output << " {RegisterUnitID::fromValue(" << Unit.ID << "), ";
appendQuoted(Output, Unit.Name);
Output << "},\n";
}
Output << " };\n\n Description.PhysicalRegisters = {\n";
for (const NormalizedRegister &Register : Model.Registers) {
Output << " {physical(PhysicalRegisterID::" << Register.Symbol << "), ";
appendQuoted(Output, Register.Name);
Output << ", " << Register.Encoding << ", {";
for (const NormalizedRegisterUnitLane &Unit : Register.Units) {
Output << "unitLane(RegisterUnit::" << findRegisterUnit(Model, Unit.UnitID).Symbol << ", "
<< Unit.Lanes << "), ";
}
Output << "}, " << (Register.IsConstant ? "true" : "false") << ", "
<< (Register.IsArtificial ? "true" : "false") << ", "
<< (Register.IsReserved ? "true" : "false") << ", {";
for (const std::string &Alias : Register.AlternativeNames) {
appendQuoted(Output, Alias);
Output << ", ";
}
Output << "}},\n";
}
Output << " };\n\n Description.RegisterBanks = {\n";
Output << emitRegisterBanks(Model);
Output << " };\n\n Description.RegisterClasses = {\n";
for (const NormalizedRegisterClass &Class : Model.RegisterClasses) {
Output << " registerClass(RegisterClass::" << Class.Symbol << ", ";
appendQuoted(Output, Class.Name);
Output << ", {";
emitRegisterIDList(Output, Model, Class.Registers);
Output << "}, {";
emitRegisterIDList(Output, Model, Class.AllocationOrder);
Output << "}, RegisterBank::" << findRegisterBank(Model, Class.BankID).Symbol << ", "
<< Class.SizeInBits << ", " << Class.SpillSizeInBits << ", "
<< Class.SpillAlignmentInBits << ", " << Class.Lanes << ", "
<< (Class.Allocatable ? "true" : "false") << ", " << Class.CopyCost << "),\n";
}
Output << " };\n}\n\n";
Output << "void appendGeneratedMIRTextInfo(TargetMIRTextInfoDesc &Description) {\n";
Output << " Description.DirectOperandFlagMask = " << Model.MIROperandFlags.DirectMask
<< ";\n Description.DirectOperandFlags = {\n";
for (const SourceMIROperandFlag &Flag : Model.MIROperandFlags.Direct) {
Output << " {";
appendQuoted(Output, Flag.Name);
Output << ", " << Flag.Value << "},\n";
}
Output << " };\n Description.BitmaskOperandFlags = {\n";
for (const SourceMIROperandFlag &Flag : Model.MIROperandFlags.Bitmask) {
Output << " {";
appendQuoted(Output, Flag.Name);
Output << ", " << Flag.Value << "},\n";
}
Output << " };\n";
Output << " Description.RegisterMasks = {\n";
for (const NormalizedRegisterMask &Mask : Model.RegisterMasks) {
Output << " {";
appendQuoted(Output, Mask.Name);
Output << ", makePreservedMask({";
emitRegisterIDList(Output, Model, Mask.PreservedRegisters);
Output << "})},\n";
}
Output << " };\n Description.CFIRegisters = {\n";
std::unordered_set<std::uint32_t> CanonicalDwarfRegisters;
for (const NormalizedRegister &Register : Model.Registers) {
const bool IsCanonical = CanonicalDwarfRegisters.insert(Register.DwarfRegister).second;
Output << " {physical(PhysicalRegisterID::" << Register.Symbol << "), "
<< Register.DwarfRegister << ", " << (IsCanonical ? "true" : "false") << "},\n";
}
Output << " };\n}\n\n";
return Output.str();
}
} // namespace rcc::targetgen
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