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) { 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, raw_ostream &OS) { 49 int Offset = 0; 50 const MCSymbolRefExpr *SRE; 51 52 if (const MCBinaryExpr *BE = dyn_cast<MCBinaryExpr>(Expr)) { 53 SRE = dyn_cast<MCSymbolRefExpr>(BE->getLHS()); 54 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(BE->getRHS()); 55 assert(SRE && CE && "Binary expression must be sym+const."); 56 Offset = CE->getValue(); 57 } else { 58 SRE = dyn_cast<MCSymbolRefExpr>(Expr); 59 assert(SRE && "Unexpected MCExpr type."); 60 } 61 assert(SRE->getKind() == MCSymbolRefExpr::VK_None); 62 63 OS << SRE->getSymbol(); 64 65 if (Offset) { 66 if (Offset > 0) 67 OS << '+'; 68 OS << Offset; 69 } 70 } 71 72 void XCoreInstPrinter:: 73 printOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O) { 74 const MCOperand &Op = MI->getOperand(OpNo); 75 if (Op.isReg()) { 76 printRegName(O, Op.getReg()); 77 return; 78 } 79 80 if (Op.isImm()) { 81 O << Op.getImm(); 82 return; 83 } 84 85 assert(Op.isExpr() && "unknown operand kind in printOperand"); 86 printExpr(Op.getExpr(), O); 87 } 88
