103 lines · cpp
1//===- LoongArchInstPrinter.cpp - Convert LoongArch MCInst to asm syntax --===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This class prints an LoongArch MCInst to a .s file.10//11//===----------------------------------------------------------------------===//12 13#include "LoongArchInstPrinter.h"14#include "LoongArchMCTargetDesc.h"15#include "llvm/MC/MCAsmInfo.h"16#include "llvm/MC/MCInst.h"17#include "llvm/MC/MCSubtargetInfo.h"18#include "llvm/MC/MCSymbol.h"19#include "llvm/Support/CommandLine.h"20using namespace llvm;21 22#define DEBUG_TYPE "loongarch-asm-printer"23 24// Include the auto-generated portion of the assembly writer.25#define PRINT_ALIAS_INSTR26#include "LoongArchGenAsmWriter.inc"27 28static cl::opt<bool>29 NoAliases("loongarch-no-aliases",30 cl::desc("Disable the emission of assembler pseudo instructions"),31 cl::init(false), cl::Hidden);32 33static cl::opt<bool>34 NumericReg("loongarch-numeric-reg",35 cl::desc("Print numeric register names rather than the ABI "36 "names (such as $r0 instead of $zero)"),37 cl::init(false), cl::Hidden);38 39// The command-line flag above is used by llvm-mc and llc. It can be used by40// `llvm-objdump`, but we override the value here to handle options passed to41// `llvm-objdump` with `-M` (which matches GNU objdump). There did not seem to42// be an easier way to allow these options in all these tools, without doing it43// this way.44bool LoongArchInstPrinter::applyTargetSpecificCLOption(StringRef Opt) {45 if (Opt == "no-aliases") {46 PrintAliases = false;47 return true;48 }49 50 if (Opt == "numeric") {51 NumericReg = true;52 return true;53 }54 55 return false;56}57 58void LoongArchInstPrinter::printInst(const MCInst *MI, uint64_t Address,59 StringRef Annot,60 const MCSubtargetInfo &STI,61 raw_ostream &O) {62 if (!PrintAliases || NoAliases || !printAliasInstr(MI, Address, STI, O))63 printInstruction(MI, Address, STI, O);64 printAnnotation(O, Annot);65}66 67void LoongArchInstPrinter::printRegName(raw_ostream &O, MCRegister Reg) {68 O << '$' << getRegisterName(Reg);69}70 71void LoongArchInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,72 const MCSubtargetInfo &STI,73 raw_ostream &O) {74 const MCOperand &MO = MI->getOperand(OpNo);75 76 if (MO.isReg()) {77 printRegName(O, MO.getReg());78 return;79 }80 81 if (MO.isImm()) {82 O << MO.getImm();83 return;84 }85 86 assert(MO.isExpr() && "Unknown operand kind in printOperand");87 MAI.printExpr(O, *MO.getExpr());88}89 90void LoongArchInstPrinter::printAtomicMemOp(const MCInst *MI, unsigned OpNo,91 const MCSubtargetInfo &STI,92 raw_ostream &O) {93 const MCOperand &MO = MI->getOperand(OpNo);94 assert(MO.isReg() && "printAtomicMemOp can only print register operands");95 printRegName(O, MO.getReg());96}97 98const char *LoongArchInstPrinter::getRegisterName(MCRegister Reg) {99 // Default print reg alias name100 return getRegisterName(Reg, NumericReg ? LoongArch::NoRegAltName101 : LoongArch::RegAliasName);102}103