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//===-- CSKYInstPrinter.cpp - Convert CSKY 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 CSKY MCInst to a .s file.
//
//===----------------------------------------------------------------------===//
#include "CSKYInstPrinter.h"
#include "llvm/ADT/StringExtras.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 "csky-asm-printer"
// Include the auto-generated portion of the assembly writer.
#define PRINT_ALIAS_INSTR
#include "CSKYGenAsmWriter.inc"
static cl::opt<bool>
NoAliases("csky-no-aliases",
cl::desc("Disable the emission of assembler pseudo instructions"),
cl::init(false), cl::Hidden);
static cl::opt<bool>
ArchRegNames("csky-arch-reg-names",
cl::desc("Print architectural register names rather than the "
"ABI names (such as r14 instead of sp)"),
cl::init(false), cl::Hidden);
// The command-line flags above are used by llvm-mc and llc. They can be used by
// `llvm-objdump`, but we override their values here to handle options passed to
// `llvm-objdump` with `-M` (which matches GNU objdump). There did not seem to
// be an easier way to allow these options in all these tools, without doing it
// this way.
bool CSKYInstPrinter::applyTargetSpecificCLOption(StringRef Opt) {
if (Opt == "no-aliases") {
NoAliases = true;
return true;
}
if (Opt == "numeric") {
ArchRegNames = true;
return true;
}
return false;
}
void CSKYInstPrinter::printInst(const MCInst *MI, uint64_t Address,
StringRef Annot, const MCSubtargetInfo &STI,
raw_ostream &O) {
const MCInst *NewMI = MI;
if (NoAliases || !printAliasInstr(NewMI, Address, STI, O))
printInstruction(NewMI, Address, STI, O);
printAnnotation(O, Annot);
}
void CSKYInstPrinter::printRegName(raw_ostream &O, unsigned RegNo) const {
O << getRegisterName(RegNo);
}
void CSKYInstPrinter::printFPRRegName(raw_ostream &O, unsigned RegNo) const {
if (PrintBranchImmAsAddress)
O << getRegisterName(RegNo, CSKY::NoRegAltName);
else
O << getRegisterName(RegNo);
}
void CSKYInstPrinter::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()) {
if (MO.getReg() == CSKY::C)
O << "";
else
printRegName(O, MO.getReg());
return;
}
if (MO.isImm()) {
O << formatImm(MO.getImm());
return;
}
assert(MO.isExpr() && "Unknown operand kind in printOperand");
MO.getExpr()->print(O, &MAI);
}
void CSKYInstPrinter::printDataSymbol(const MCInst *MI, unsigned OpNo,
const MCSubtargetInfo &STI,
raw_ostream &O) {
const MCOperand &MO = MI->getOperand(OpNo);
O << "[";
if (MO.isImm())
O << MO.getImm();
else
MO.getExpr()->print(O, &MAI);
O << "]";
}
void CSKYInstPrinter::printConstpool(const MCInst *MI, uint64_t Address,
unsigned OpNo, const MCSubtargetInfo &STI,
raw_ostream &O) {
const MCOperand &MO = MI->getOperand(OpNo);
if (MO.isImm()) {
if (PrintBranchImmAsAddress) {
uint64_t Target = Address + MO.getImm();
Target &= 0xfffffffc;
O << formatHex(Target);
} else {
O << MO.getImm();
}
return;
}
assert(MO.isExpr() && "Unknown operand kind in printConstpool");
O << "[";
MO.getExpr()->print(O, &MAI);
O << "]";
}
void CSKYInstPrinter::printCSKYSymbolOperand(const MCInst *MI, uint64_t Address,
unsigned OpNo,
const MCSubtargetInfo &STI,
raw_ostream &O) {
const MCOperand &MO = MI->getOperand(OpNo);
if (!MO.isImm()) {
return printOperand(MI, OpNo, STI, O);
}
if (PrintBranchImmAsAddress) {
uint64_t Target = Address + MO.getImm();
Target &= 0xffffffff;
O << formatHex(Target);
} else {
O << MO.getImm();
}
}
void CSKYInstPrinter::printRegisterSeq(const MCInst *MI, unsigned OpNum,
const MCSubtargetInfo &STI,
raw_ostream &O) {
printRegName(O, MI->getOperand(OpNum).getReg());
O << "-";
printRegName(O, MI->getOperand(OpNum + 1).getReg());
}
void CSKYInstPrinter::printRegisterList(const MCInst *MI, unsigned OpNum,
const MCSubtargetInfo &STI,
raw_ostream &O) {
auto V = MI->getOperand(OpNum).getImm();
ListSeparator LS;
if (V & 0xf) {
O << LS;
printRegName(O, CSKY::R4);
auto Offset = (V & 0xf) - 1;
if (Offset) {
O << "-";
printRegName(O, CSKY::R4 + Offset);
}
}
if ((V >> 4) & 0x1) {
O << LS;
printRegName(O, CSKY::R15);
}
if ((V >> 5) & 0x7) {
O << LS;
printRegName(O, CSKY::R16);
auto Offset = ((V >> 5) & 0x7) - 1;
if (Offset) {
O << "-";
printRegName(O, CSKY::R16 + Offset);
}
}
if ((V >> 8) & 0x1) {
O << LS;
printRegName(O, CSKY::R28);
}
}
const char *CSKYInstPrinter::getRegisterName(unsigned RegNo) {
return getRegisterName(RegNo, ArchRegNames ? CSKY::NoRegAltName
: CSKY::ABIRegAltName);
}
void CSKYInstPrinter::printFPR(const MCInst *MI, unsigned OpNo,
const MCSubtargetInfo &STI, raw_ostream &O) {
const MCOperand &MO = MI->getOperand(OpNo);
assert(MO.isReg());
printFPRRegName(O, MO.getReg());
}
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