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 23 using namespace llvm; 24 25 #define DEBUG_TYPE "asm-printer" 26 27 #include "XCoreGenAsmWriter.inc" 28 29 void XCoreInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const { 30 OS << StringRef(getRegisterName(RegNo)).lower(); 31 } 32 33 void 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 40 void XCoreInstPrinter:: 41 printInlineJT(const MCInst *MI, int opNum, raw_ostream &O) { 42 report_fatal_error("can't handle InlineJT"); 43 } 44 45 void XCoreInstPrinter:: 46 printInlineJT32(const MCInst *MI, int opNum, raw_ostream &O) { 47 report_fatal_error("can't handle InlineJT32"); 48 } 49 50 static 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 75 void XCoreInstPrinter:: 76 printOperand(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