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//===-- RISCVInstPrinter.cpp - Convert RISCV MCInst to asm syntax ---------===//
//
// 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 class prints an RISCV MCInst to a .s file.
//
//===----------------------------------------------------------------------===//
#include "RISCVInstPrinter.h"
#include "MCTargetDesc/RISCVMCExpr.h"
#include "Utils/RISCVBaseInfo.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FormattedStream.h"
using namespace llvm;
#define DEBUG_TYPE "asm-printer"
// Include the auto-generated portion of the assembly writer.
#define PRINT_ALIAS_INSTR
#include "RISCVGenAsmWriter.inc"
// Include the auto-generated portion of the compress emitter.
#define GEN_UNCOMPRESS_INSTR
#include "RISCVGenCompressInstEmitter.inc"
static cl::opt<bool>
NoAliases("riscv-no-aliases",
cl::desc("Disable the emission of assembler pseudo instructions"),
cl::init(false), cl::Hidden);
void RISCVInstPrinter::printInst(const MCInst *MI, raw_ostream &O,
StringRef Annot, const MCSubtargetInfo &STI) {
bool Res = false;
const MCInst *NewMI = MI;
MCInst UncompressedMI;
if (!NoAliases)
Res = uncompressInst(UncompressedMI, *MI, MRI, STI);
if (Res)
NewMI = const_cast<MCInst *>(&UncompressedMI);
if (NoAliases || !printAliasInstr(NewMI, STI, O))
printInstruction(NewMI, STI, O);
printAnnotation(O, Annot);
}
void RISCVInstPrinter::printRegName(raw_ostream &O, unsigned RegNo) const {
O << getRegisterName(RegNo);
}
void RISCVInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
const MCSubtargetInfo &STI, raw_ostream &O,
const char *Modifier) {
assert((Modifier == 0 || Modifier[0] == 0) && "No modifiers supported");
const MCOperand &MO = MI->getOperand(OpNo);
if (MO.isReg()) {
printRegName(O, MO.getReg());
return;
}
if (MO.isImm()) {
O << MO.getImm();
return;
}
assert(MO.isExpr() && "Unknown operand kind in printOperand");
MO.getExpr()->print(O, &MAI);
}
void RISCVInstPrinter::printCSRSystemRegister(const MCInst *MI, unsigned OpNo,
const MCSubtargetInfo &STI,
raw_ostream &O) {
unsigned Imm = MI->getOperand(OpNo).getImm();
auto SysReg = RISCVSysReg::lookupSysRegByEncoding(Imm);
if (SysReg && SysReg->haveRequiredFeatures(STI.getFeatureBits()))
O << SysReg->Name;
else
O << Imm;
}
void RISCVInstPrinter::printFenceArg(const MCInst *MI, unsigned OpNo,
const MCSubtargetInfo &STI,
raw_ostream &O) {
unsigned FenceArg = MI->getOperand(OpNo).getImm();
assert (((FenceArg >> 4) == 0) && "Invalid immediate in printFenceArg");
if ((FenceArg & RISCVFenceField::I) != 0)
O << 'i';
if ((FenceArg & RISCVFenceField::O) != 0)
O << 'o';
if ((FenceArg & RISCVFenceField::R) != 0)
O << 'r';
if ((FenceArg & RISCVFenceField::W) != 0)
O << 'w';
if (FenceArg == 0)
O << "unknown";
}
void RISCVInstPrinter::printFRMArg(const MCInst *MI, unsigned OpNo,
const MCSubtargetInfo &STI, raw_ostream &O) {
auto FRMArg =
static_cast<RISCVFPRndMode::RoundingMode>(MI->getOperand(OpNo).getImm());
O << RISCVFPRndMode::roundingModeToString(FRMArg);
}
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