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" 22using namespace llvm; 23 24#define DEBUG_TYPE "asm-printer" 25 26#include "XCoreGenAsmWriter.inc" 27 28void XCoreInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const { 29 OS << StringRef(getRegisterName(RegNo)).lower(); 30} 31 32void XCoreInstPrinter::printInst(const MCInst *MI, raw_ostream &O, 33 StringRef Annot) { 34 printInstruction(MI, O); 35 printAnnotation(O, Annot); 36} 37 38void XCoreInstPrinter:: 39printInlineJT(const MCInst *MI, int opNum, raw_ostream &O) { 40 report_fatal_error("can't handle InlineJT"); 41} 42 43void XCoreInstPrinter:: 44printInlineJT32(const MCInst *MI, int opNum, raw_ostream &O) { 45 report_fatal_error("can't handle InlineJT32"); 46} 47 48static 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 72void XCoreInstPrinter:: 73printOperand(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