1218885Sdim//===-- MSP430InstPrinter.cpp - Convert MSP430 MCInst to assembly syntax --===// 2218885Sdim// 3218885Sdim// The LLVM Compiler Infrastructure 4218885Sdim// 5218885Sdim// This file is distributed under the University of Illinois Open Source 6218885Sdim// License. See LICENSE.TXT for details. 7218885Sdim// 8218885Sdim//===----------------------------------------------------------------------===// 9218885Sdim// 10218885Sdim// This class prints an MSP430 MCInst to a .s file. 11218885Sdim// 12218885Sdim//===----------------------------------------------------------------------===// 13218885Sdim 14218885Sdim#define DEBUG_TYPE "asm-printer" 15249423Sdim#include "MSP430InstPrinter.h" 16218885Sdim#include "MSP430.h" 17218885Sdim#include "llvm/MC/MCAsmInfo.h" 18218885Sdim#include "llvm/MC/MCExpr.h" 19249423Sdim#include "llvm/MC/MCInst.h" 20218885Sdim#include "llvm/Support/ErrorHandling.h" 21218885Sdim#include "llvm/Support/FormattedStream.h" 22218885Sdimusing namespace llvm; 23218885Sdim 24218885Sdim 25218885Sdim// Include the auto-generated portion of the assembly writer. 26218885Sdim#include "MSP430GenAsmWriter.inc" 27218885Sdim 28226633Sdimvoid MSP430InstPrinter::printInst(const MCInst *MI, raw_ostream &O, 29226633Sdim StringRef Annot) { 30218885Sdim printInstruction(MI, O); 31226633Sdim printAnnotation(O, Annot); 32218885Sdim} 33218885Sdim 34218885Sdimvoid MSP430InstPrinter::printPCRelImmOperand(const MCInst *MI, unsigned OpNo, 35218885Sdim raw_ostream &O) { 36218885Sdim const MCOperand &Op = MI->getOperand(OpNo); 37218885Sdim if (Op.isImm()) 38218885Sdim O << Op.getImm(); 39218885Sdim else { 40218885Sdim assert(Op.isExpr() && "unknown pcrel immediate operand"); 41218885Sdim O << *Op.getExpr(); 42218885Sdim } 43218885Sdim} 44218885Sdim 45218885Sdimvoid MSP430InstPrinter::printOperand(const MCInst *MI, unsigned OpNo, 46218885Sdim raw_ostream &O, const char *Modifier) { 47218885Sdim assert((Modifier == 0 || Modifier[0] == 0) && "No modifiers supported"); 48218885Sdim const MCOperand &Op = MI->getOperand(OpNo); 49218885Sdim if (Op.isReg()) { 50218885Sdim O << getRegisterName(Op.getReg()); 51218885Sdim } else if (Op.isImm()) { 52218885Sdim O << '#' << Op.getImm(); 53218885Sdim } else { 54218885Sdim assert(Op.isExpr() && "unknown operand kind in printOperand"); 55218885Sdim O << '#' << *Op.getExpr(); 56218885Sdim } 57218885Sdim} 58218885Sdim 59218885Sdimvoid MSP430InstPrinter::printSrcMemOperand(const MCInst *MI, unsigned OpNo, 60218885Sdim raw_ostream &O, 61218885Sdim const char *Modifier) { 62218885Sdim const MCOperand &Base = MI->getOperand(OpNo); 63218885Sdim const MCOperand &Disp = MI->getOperand(OpNo+1); 64218885Sdim 65218885Sdim // Print displacement first 66218885Sdim 67218885Sdim // If the global address expression is a part of displacement field with a 68218885Sdim // register base, we should not emit any prefix symbol here, e.g. 69218885Sdim // mov.w &foo, r1 70218885Sdim // vs 71218885Sdim // mov.w glb(r1), r2 72218885Sdim // Otherwise (!) msp430-as will silently miscompile the output :( 73218885Sdim if (!Base.getReg()) 74218885Sdim O << '&'; 75218885Sdim 76218885Sdim if (Disp.isExpr()) 77218885Sdim O << *Disp.getExpr(); 78218885Sdim else { 79218885Sdim assert(Disp.isImm() && "Expected immediate in displacement field"); 80218885Sdim O << Disp.getImm(); 81218885Sdim } 82218885Sdim 83218885Sdim // Print register base field 84218885Sdim if (Base.getReg()) 85218885Sdim O << '(' << getRegisterName(Base.getReg()) << ')'; 86218885Sdim} 87218885Sdim 88218885Sdimvoid MSP430InstPrinter::printCCOperand(const MCInst *MI, unsigned OpNo, 89218885Sdim raw_ostream &O) { 90218885Sdim unsigned CC = MI->getOperand(OpNo).getImm(); 91218885Sdim 92218885Sdim switch (CC) { 93218885Sdim default: 94218885Sdim llvm_unreachable("Unsupported CC code"); 95218885Sdim case MSP430CC::COND_E: 96218885Sdim O << "eq"; 97218885Sdim break; 98218885Sdim case MSP430CC::COND_NE: 99218885Sdim O << "ne"; 100218885Sdim break; 101218885Sdim case MSP430CC::COND_HS: 102218885Sdim O << "hs"; 103218885Sdim break; 104218885Sdim case MSP430CC::COND_LO: 105218885Sdim O << "lo"; 106218885Sdim break; 107218885Sdim case MSP430CC::COND_GE: 108218885Sdim O << "ge"; 109218885Sdim break; 110218885Sdim case MSP430CC::COND_L: 111218885Sdim O << 'l'; 112218885Sdim break; 113218885Sdim } 114218885Sdim} 115