1 //===-- XCoreInstPrinter.cpp - Convert XCore MCInst to assembly syntax ----===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This class prints an XCore MCInst to a .s file. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "XCoreInstPrinter.h" 15 #include "llvm/ADT/StringExtras.h" 16 #include "llvm/MC/MCExpr.h" 17 #include "llvm/MC/MCInst.h" 18 #include "llvm/MC/MCInstrInfo.h" 19 #include "llvm/MC/MCSymbol.h" 20 #include "llvm/Support/ErrorHandling.h" 21 #include "llvm/Support/raw_ostream.h" 22 using namespace llvm; 23 24 #define DEBUG_TYPE "asm-printer" 25 26 #include "XCoreGenAsmWriter.inc" 27 28 void XCoreInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const { 29 OS << StringRef(getRegisterName(RegNo)).lower(); 30 } 31 32 void XCoreInstPrinter::printInst(const MCInst *MI, raw_ostream &O, 33 StringRef Annot, const MCSubtargetInfo &STI) { 34 printInstruction(MI, O); 35 printAnnotation(O, Annot); 36 } 37 38 void XCoreInstPrinter:: 39 printInlineJT(const MCInst *MI, int opNum, raw_ostream &O) { 40 report_fatal_error("can't handle InlineJT"); 41 } 42 43 void XCoreInstPrinter:: 44 printInlineJT32(const MCInst *MI, int opNum, raw_ostream &O) { 45 report_fatal_error("can't handle InlineJT32"); 46 } 47 48 static void printExpr(const MCExpr *Expr, const MCAsmInfo *MAI, 49 raw_ostream &OS) { 50 int Offset = 0; 51 const MCSymbolRefExpr *SRE; 52 53 if (const MCBinaryExpr *BE = dyn_cast<MCBinaryExpr>(Expr)) { 54 SRE = dyn_cast<MCSymbolRefExpr>(BE->getLHS()); 55 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(BE->getRHS()); 56 assert(SRE && CE && "Binary expression must be sym+const."); 57 Offset = CE->getValue(); 58 } else { 59 SRE = dyn_cast<MCSymbolRefExpr>(Expr); 60 assert(SRE && "Unexpected MCExpr type."); 61 } 62 assert(SRE->getKind() == MCSymbolRefExpr::VK_None); 63 64 SRE->getSymbol().print(OS, MAI); 65 66 if (Offset) { 67 if (Offset > 0) 68 OS << '+'; 69 OS << Offset; 70 } 71 } 72 73 void XCoreInstPrinter:: 74 printOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O) { 75 const MCOperand &Op = MI->getOperand(OpNo); 76 if (Op.isReg()) { 77 printRegName(O, Op.getReg()); 78 return; 79 } 80 81 if (Op.isImm()) { 82 O << Op.getImm(); 83 return; 84 } 85 86 assert(Op.isExpr() && "unknown operand kind in printOperand"); 87 printExpr(Op.getExpr(), &MAI, O); 88 } 89
