103 lines
3.5 KiB
C++
103 lines
3.5 KiB
C++
//===- LoongArchInstPrinter.cpp - Convert LoongArch MCInst to asm syntax --===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This class prints an LoongArch MCInst to a .s file.
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//
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//===----------------------------------------------------------------------===//
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#include "LoongArchInstPrinter.h"
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#include "LoongArchMCTargetDesc.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCInst.h"
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#include "llvm/MC/MCSubtargetInfo.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/Support/CommandLine.h"
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using namespace llvm;
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#define DEBUG_TYPE "loongarch-asm-printer"
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// Include the auto-generated portion of the assembly writer.
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#define PRINT_ALIAS_INSTR
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#include "LoongArchGenAsmWriter.inc"
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static cl::opt<bool>
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NoAliases("loongarch-no-aliases",
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cl::desc("Disable the emission of assembler pseudo instructions"),
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cl::init(false), cl::Hidden);
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static cl::opt<bool>
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NumericReg("loongarch-numeric-reg",
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cl::desc("Print numeric register names rather than the ABI "
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"names (such as $r0 instead of $zero)"),
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cl::init(false), cl::Hidden);
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// The command-line flag above is used by llvm-mc and llc. It can be used by
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// `llvm-objdump`, but we override the value here to handle options passed to
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// `llvm-objdump` with `-M` (which matches GNU objdump). There did not seem to
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// be an easier way to allow these options in all these tools, without doing it
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// this way.
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bool LoongArchInstPrinter::applyTargetSpecificCLOption(StringRef Opt) {
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if (Opt == "no-aliases") {
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PrintAliases = false;
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return true;
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}
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if (Opt == "numeric") {
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NumericReg = true;
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return true;
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}
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return false;
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}
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void LoongArchInstPrinter::printInst(const MCInst *MI, uint64_t Address,
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StringRef Annot,
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const MCSubtargetInfo &STI,
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raw_ostream &O) {
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if (!PrintAliases || NoAliases || !printAliasInstr(MI, Address, STI, O))
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printInstruction(MI, Address, STI, O);
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printAnnotation(O, Annot);
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}
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void LoongArchInstPrinter::printRegName(raw_ostream &O, MCRegister Reg) {
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O << '$' << getRegisterName(Reg);
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}
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void LoongArchInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
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const MCSubtargetInfo &STI,
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raw_ostream &O) {
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const MCOperand &MO = MI->getOperand(OpNo);
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if (MO.isReg()) {
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printRegName(O, MO.getReg());
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return;
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}
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if (MO.isImm()) {
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O << MO.getImm();
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return;
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}
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assert(MO.isExpr() && "Unknown operand kind in printOperand");
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MAI.printExpr(O, *MO.getExpr());
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}
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void LoongArchInstPrinter::printAtomicMemOp(const MCInst *MI, unsigned OpNo,
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const MCSubtargetInfo &STI,
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raw_ostream &O) {
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const MCOperand &MO = MI->getOperand(OpNo);
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assert(MO.isReg() && "printAtomicMemOp can only print register operands");
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printRegName(O, MO.getReg());
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}
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const char *LoongArchInstPrinter::getRegisterName(MCRegister Reg) {
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// Default print reg alias name
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return getRegisterName(Reg, NumericReg ? LoongArch::NoRegAltName
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: LoongArch::RegAliasName);
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}
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