1 //===-- MSP430InstPrinter.cpp - Convert MSP430 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 MSP430 MCInst to a .s file. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #define DEBUG_TYPE "asm-printer" 15 #include "MSP430.h" 16 #include "MSP430InstPrinter.h" 17 #include "llvm/MC/MCInst.h" 18 #include "llvm/MC/MCAsmInfo.h" 19 #include "llvm/MC/MCExpr.h" 20 #include "llvm/Support/ErrorHandling.h" 21 #include "llvm/Support/FormattedStream.h" 22 using namespace llvm; 23 24 25 // Include the auto-generated portion of the assembly writer. 26 #include "MSP430GenAsmWriter.inc" 27 28 void MSP430InstPrinter::printInst(const MCInst *MI, raw_ostream &O) { 29 printInstruction(MI, O); 30 } 31 32 void MSP430InstPrinter::printPCRelImmOperand(const MCInst *MI, unsigned OpNo, 33 raw_ostream &O) { 34 const MCOperand &Op = MI->getOperand(OpNo); 35 if (Op.isImm()) 36 O << Op.getImm(); 37 else { 38 assert(Op.isExpr() && "unknown pcrel immediate operand"); 39 O << *Op.getExpr(); 40 } 41 } 42 43 void MSP430InstPrinter::printOperand(const MCInst *MI, unsigned OpNo, 44 raw_ostream &O, const char *Modifier) { 45 assert((Modifier == 0 || Modifier[0] == 0) && "No modifiers supported"); 46 const MCOperand &Op = MI->getOperand(OpNo); 47 if (Op.isReg()) { 48 O << getRegisterName(Op.getReg()); 49 } else if (Op.isImm()) { 50 O << '#' << Op.getImm(); 51 } else { 52 assert(Op.isExpr() && "unknown operand kind in printOperand"); 53 O << '#' << *Op.getExpr(); 54 } 55 } 56 57 void MSP430InstPrinter::printSrcMemOperand(const MCInst *MI, unsigned OpNo, 58 raw_ostream &O, 59 const char *Modifier) { 60 const MCOperand &Base = MI->getOperand(OpNo); 61 const MCOperand &Disp = MI->getOperand(OpNo+1); 62 63 // Print displacement first 64 65 // If the global address expression is a part of displacement field with a 66 // register base, we should not emit any prefix symbol here, e.g. 67 // mov.w &foo, r1 68 // vs 69 // mov.w glb(r1), r2 70 // Otherwise (!) msp430-as will silently miscompile the output :( 71 if (!Base.getReg()) 72 O << '&'; 73 74 if (Disp.isExpr()) 75 O << *Disp.getExpr(); 76 else { 77 assert(Disp.isImm() && "Expected immediate in displacement field"); 78 O << Disp.getImm(); 79 } 80 81 // Print register base field 82 if (Base.getReg()) 83 O << '(' << getRegisterName(Base.getReg()) << ')'; 84 } 85 86 void MSP430InstPrinter::printCCOperand(const MCInst *MI, unsigned OpNo, 87 raw_ostream &O) { 88 unsigned CC = MI->getOperand(OpNo).getImm(); 89 90 switch (CC) { 91 default: 92 llvm_unreachable("Unsupported CC code"); 93 break; 94 case MSP430CC::COND_E: 95 O << "eq"; 96 break; 97 case MSP430CC::COND_NE: 98 O << "ne"; 99 break; 100 case MSP430CC::COND_HS: 101 O << "hs"; 102 break; 103 case MSP430CC::COND_LO: 104 O << "lo"; 105 break; 106 case MSP430CC::COND_GE: 107 O << "ge"; 108 break; 109 case MSP430CC::COND_L: 110 O << 'l'; 111 break; 112 } 113 } 114
