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//===-- RISCVMCTargetDesc.cpp - RISCV Target Descriptions -----------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
/// This file provides RISCV-specific target descriptions.
///
//===----------------------------------------------------------------------===//
#include "RISCVMCTargetDesc.h"
#include "RISCVBaseInfo.h"
#include "RISCVELFStreamer.h"
#include "RISCVInstPrinter.h"
#include "RISCVMCAsmInfo.h"
#include "RISCVMCObjectFileInfo.h"
#include "RISCVTargetStreamer.h"
#include "TargetInfo/RISCVTargetInfo.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCInstrAnalysis.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Support/ErrorHandling.h"
#define GET_INSTRINFO_MC_DESC
#include "RISCVGenInstrInfo.inc"
#define GET_REGINFO_MC_DESC
#include "RISCVGenRegisterInfo.inc"
#define GET_SUBTARGETINFO_MC_DESC
#include "RISCVGenSubtargetInfo.inc"
using namespace llvm;
static MCInstrInfo *createRISCVMCInstrInfo() {
MCInstrInfo *X = new MCInstrInfo();
InitRISCVMCInstrInfo(X);
return X;
}
static MCRegisterInfo *createRISCVMCRegisterInfo(const Triple &TT) {
MCRegisterInfo *X = new MCRegisterInfo();
InitRISCVMCRegisterInfo(X, RISCV::X1);
return X;
}
static MCAsmInfo *createRISCVMCAsmInfo(const MCRegisterInfo &MRI,
const Triple &TT,
const MCTargetOptions &Options) {
MCAsmInfo *MAI = new RISCVMCAsmInfo(TT);
MCRegister SP = MRI.getDwarfRegNum(RISCV::X2, true);
MCCFIInstruction Inst = MCCFIInstruction::cfiDefCfa(nullptr, SP, 0);
MAI->addInitialFrameState(Inst);
return MAI;
}
static MCObjectFileInfo *
createRISCVMCObjectFileInfo(MCContext &Ctx, bool PIC,
bool LargeCodeModel = false) {
MCObjectFileInfo *MOFI = new RISCVMCObjectFileInfo();
MOFI->initMCObjectFileInfo(Ctx, PIC, LargeCodeModel);
return MOFI;
}
static MCSubtargetInfo *createRISCVMCSubtargetInfo(const Triple &TT,
StringRef CPU, StringRef FS) {
if (CPU.empty())
CPU = TT.isArch64Bit() ? "generic-rv64" : "generic-rv32";
if (CPU == "generic")
report_fatal_error(Twine("CPU 'generic' is not supported. Use ") +
(TT.isArch64Bit() ? "generic-rv64" : "generic-rv32"));
return createRISCVMCSubtargetInfoImpl(TT, CPU, /*TuneCPU*/ CPU, FS);
}
static MCInstPrinter *createRISCVMCInstPrinter(const Triple &T,
unsigned SyntaxVariant,
const MCAsmInfo &MAI,
const MCInstrInfo &MII,
const MCRegisterInfo &MRI) {
return new RISCVInstPrinter(MAI, MII, MRI);
}
static MCTargetStreamer *
createRISCVObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI) {
const Triple &TT = STI.getTargetTriple();
if (TT.isOSBinFormatELF())
return new RISCVTargetELFStreamer(S, STI);
return nullptr;
}
static MCTargetStreamer *createRISCVAsmTargetStreamer(MCStreamer &S,
formatted_raw_ostream &OS,
MCInstPrinter *InstPrint,
bool isVerboseAsm) {
return new RISCVTargetAsmStreamer(S, OS);
}
static MCTargetStreamer *createRISCVNullTargetStreamer(MCStreamer &S) {
return new RISCVTargetStreamer(S);
}
namespace {
class RISCVMCInstrAnalysis : public MCInstrAnalysis {
public:
explicit RISCVMCInstrAnalysis(const MCInstrInfo *Info)
: MCInstrAnalysis(Info) {}
bool evaluateBranch(const MCInst &Inst, uint64_t Addr, uint64_t Size,
uint64_t &Target) const override {
if (isConditionalBranch(Inst)) {
int64_t Imm;
if (Size == 2)
Imm = Inst.getOperand(1).getImm();
else
Imm = Inst.getOperand(2).getImm();
Target = Addr + Imm;
return true;
}
if (Inst.getOpcode() == RISCV::C_JAL || Inst.getOpcode() == RISCV::C_J) {
Target = Addr + Inst.getOperand(0).getImm();
return true;
}
if (Inst.getOpcode() == RISCV::JAL) {
Target = Addr + Inst.getOperand(1).getImm();
return true;
}
return false;
}
};
} // end anonymous namespace
static MCInstrAnalysis *createRISCVInstrAnalysis(const MCInstrInfo *Info) {
return new RISCVMCInstrAnalysis(Info);
}
namespace {
MCStreamer *createRISCVELFStreamer(const Triple &T, MCContext &Context,
std::unique_ptr<MCAsmBackend> &&MAB,
std::unique_ptr<MCObjectWriter> &&MOW,
std::unique_ptr<MCCodeEmitter> &&MCE,
bool RelaxAll) {
return createRISCVELFStreamer(Context, std::move(MAB), std::move(MOW),
std::move(MCE), RelaxAll);
}
} // end anonymous namespace
extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeRISCVTargetMC() {
for (Target *T : {&getTheRISCV32Target(), &getTheRISCV64Target()}) {
TargetRegistry::RegisterMCAsmInfo(*T, createRISCVMCAsmInfo);
TargetRegistry::RegisterMCObjectFileInfo(*T, createRISCVMCObjectFileInfo);
TargetRegistry::RegisterMCInstrInfo(*T, createRISCVMCInstrInfo);
TargetRegistry::RegisterMCRegInfo(*T, createRISCVMCRegisterInfo);
TargetRegistry::RegisterMCAsmBackend(*T, createRISCVAsmBackend);
TargetRegistry::RegisterMCCodeEmitter(*T, createRISCVMCCodeEmitter);
TargetRegistry::RegisterMCInstPrinter(*T, createRISCVMCInstPrinter);
TargetRegistry::RegisterMCSubtargetInfo(*T, createRISCVMCSubtargetInfo);
TargetRegistry::RegisterELFStreamer(*T, createRISCVELFStreamer);
TargetRegistry::RegisterObjectTargetStreamer(
*T, createRISCVObjectTargetStreamer);
TargetRegistry::RegisterMCInstrAnalysis(*T, createRISCVInstrAnalysis);
// Register the asm target streamer.
TargetRegistry::RegisterAsmTargetStreamer(*T, createRISCVAsmTargetStreamer);
// Register the null target streamer.
TargetRegistry::RegisterNullTargetStreamer(*T,
createRISCVNullTargetStreamer);
}
}
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