MSP430InstPrinter.cpp revision 218885
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" 15218885Sdim#include "MSP430.h" 16218885Sdim#include "MSP430InstPrinter.h" 17218885Sdim#include "llvm/MC/MCInst.h" 18218885Sdim#include "llvm/MC/MCAsmInfo.h" 19218885Sdim#include "llvm/MC/MCExpr.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 28218885Sdimvoid MSP430InstPrinter::printInst(const MCInst *MI, raw_ostream &O) { 29218885Sdim printInstruction(MI, O); 30218885Sdim} 31218885Sdim 32218885Sdimvoid MSP430InstPrinter::printPCRelImmOperand(const MCInst *MI, unsigned OpNo, 33218885Sdim raw_ostream &O) { 34218885Sdim const MCOperand &Op = MI->getOperand(OpNo); 35218885Sdim if (Op.isImm()) 36218885Sdim O << Op.getImm(); 37218885Sdim else { 38218885Sdim assert(Op.isExpr() && "unknown pcrel immediate operand"); 39218885Sdim O << *Op.getExpr(); 40218885Sdim } 41218885Sdim} 42218885Sdim 43218885Sdimvoid MSP430InstPrinter::printOperand(const MCInst *MI, unsigned OpNo, 44218885Sdim raw_ostream &O, const char *Modifier) { 45218885Sdim assert((Modifier == 0 || Modifier[0] == 0) && "No modifiers supported"); 46218885Sdim const MCOperand &Op = MI->getOperand(OpNo); 47218885Sdim if (Op.isReg()) { 48218885Sdim O << getRegisterName(Op.getReg()); 49218885Sdim } else if (Op.isImm()) { 50218885Sdim O << '#' << Op.getImm(); 51218885Sdim } else { 52218885Sdim assert(Op.isExpr() && "unknown operand kind in printOperand"); 53218885Sdim O << '#' << *Op.getExpr(); 54218885Sdim } 55218885Sdim} 56218885Sdim 57218885Sdimvoid MSP430InstPrinter::printSrcMemOperand(const MCInst *MI, unsigned OpNo, 58218885Sdim raw_ostream &O, 59218885Sdim const char *Modifier) { 60218885Sdim const MCOperand &Base = MI->getOperand(OpNo); 61218885Sdim const MCOperand &Disp = MI->getOperand(OpNo+1); 62218885Sdim 63218885Sdim // Print displacement first 64218885Sdim 65218885Sdim // If the global address expression is a part of displacement field with a 66218885Sdim // register base, we should not emit any prefix symbol here, e.g. 67218885Sdim // mov.w &foo, r1 68218885Sdim // vs 69218885Sdim // mov.w glb(r1), r2 70218885Sdim // Otherwise (!) msp430-as will silently miscompile the output :( 71218885Sdim if (!Base.getReg()) 72218885Sdim O << '&'; 73218885Sdim 74218885Sdim if (Disp.isExpr()) 75218885Sdim O << *Disp.getExpr(); 76218885Sdim else { 77218885Sdim assert(Disp.isImm() && "Expected immediate in displacement field"); 78218885Sdim O << Disp.getImm(); 79218885Sdim } 80218885Sdim 81218885Sdim // Print register base field 82218885Sdim if (Base.getReg()) 83218885Sdim O << '(' << getRegisterName(Base.getReg()) << ')'; 84218885Sdim} 85218885Sdim 86218885Sdimvoid MSP430InstPrinter::printCCOperand(const MCInst *MI, unsigned OpNo, 87218885Sdim raw_ostream &O) { 88218885Sdim unsigned CC = MI->getOperand(OpNo).getImm(); 89218885Sdim 90218885Sdim switch (CC) { 91218885Sdim default: 92218885Sdim llvm_unreachable("Unsupported CC code"); 93218885Sdim break; 94218885Sdim case MSP430CC::COND_E: 95218885Sdim O << "eq"; 96218885Sdim break; 97218885Sdim case MSP430CC::COND_NE: 98218885Sdim O << "ne"; 99218885Sdim break; 100218885Sdim case MSP430CC::COND_HS: 101218885Sdim O << "hs"; 102218885Sdim break; 103218885Sdim case MSP430CC::COND_LO: 104218885Sdim O << "lo"; 105218885Sdim break; 106218885Sdim case MSP430CC::COND_GE: 107218885Sdim O << "ge"; 108218885Sdim break; 109218885Sdim case MSP430CC::COND_L: 110218885Sdim O << 'l'; 111218885Sdim break; 112218885Sdim } 113218885Sdim} 114