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