1//===-- XCoreInstPrinter.cpp - Convert XCore MCInst to assembly 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-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This class prints an XCore MCInst to a .s file.
10//
11//===----------------------------------------------------------------------===//
12
13#include "XCoreInstPrinter.h"
14#include "llvm/ADT/StringRef.h"
15#include "llvm/MC/MCExpr.h"
16#include "llvm/MC/MCInst.h"
17#include "llvm/MC/MCSymbol.h"
18#include "llvm/Support/Casting.h"
19#include "llvm/Support/ErrorHandling.h"
20#include "llvm/Support/raw_ostream.h"
21#include <cassert>
22
23using namespace llvm;
24
25#define DEBUG_TYPE "asm-printer"
26
27#include "XCoreGenAsmWriter.inc"
28
29void XCoreInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const {
30  OS << StringRef(getRegisterName(RegNo)).lower();
31}
32
33void XCoreInstPrinter::printInst(const MCInst *MI, uint64_t Address,
34                                 StringRef Annot, const MCSubtargetInfo &STI,
35                                 raw_ostream &O) {
36  printInstruction(MI, Address, O);
37  printAnnotation(O, Annot);
38}
39
40void XCoreInstPrinter::
41printInlineJT(const MCInst *MI, int opNum, raw_ostream &O) {
42  report_fatal_error("can't handle InlineJT");
43}
44
45void XCoreInstPrinter::
46printInlineJT32(const MCInst *MI, int opNum, raw_ostream &O) {
47  report_fatal_error("can't handle InlineJT32");
48}
49
50static void printExpr(const MCExpr *Expr, const MCAsmInfo *MAI,
51                      raw_ostream &OS) {
52  int Offset = 0;
53  const MCSymbolRefExpr *SRE;
54
55  if (const MCBinaryExpr *BE = dyn_cast<MCBinaryExpr>(Expr)) {
56    SRE = dyn_cast<MCSymbolRefExpr>(BE->getLHS());
57    const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(BE->getRHS());
58    assert(SRE && CE && "Binary expression must be sym+const.");
59    Offset = CE->getValue();
60  } else {
61    SRE = dyn_cast<MCSymbolRefExpr>(Expr);
62    assert(SRE && "Unexpected MCExpr type.");
63  }
64  assert(SRE->getKind() == MCSymbolRefExpr::VK_None);
65
66  SRE->getSymbol().print(OS, MAI);
67
68  if (Offset) {
69    if (Offset > 0)
70      OS << '+';
71    OS << Offset;
72  }
73}
74
75void XCoreInstPrinter::
76printOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O) {
77  const MCOperand &Op = MI->getOperand(OpNo);
78  if (Op.isReg()) {
79    printRegName(O, Op.getReg());
80    return;
81  }
82
83  if (Op.isImm()) {
84    O << Op.getImm();
85    return;
86  }
87
88  assert(Op.isExpr() && "unknown operand kind in printOperand");
89  printExpr(Op.getExpr(), &MAI, O);
90}
91