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//===-- MSP430InstPrinter.cpp - Convert MSP430 MCInst to assembly syntax --===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This class prints an MSP430 MCInst to a .s file.
//
//===----------------------------------------------------------------------===//
#include "MSP430InstPrinter.h"
#include "MSP430.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FormattedStream.h"
using namespace llvm;
#define DEBUG_TYPE "asm-printer"
// Include the auto-generated portion of the assembly writer.
#include "MSP430GenAsmWriter.inc"
void MSP430InstPrinter::printInst(const MCInst *MI, raw_ostream &O,
StringRef Annot) {
printInstruction(MI, O);
printAnnotation(O, Annot);
}
void MSP430InstPrinter::printPCRelImmOperand(const MCInst *MI, unsigned OpNo,
raw_ostream &O) {
const MCOperand &Op = MI->getOperand(OpNo);
if (Op.isImm())
O << Op.getImm();
else {
assert(Op.isExpr() && "unknown pcrel immediate operand");
O << *Op.getExpr();
}
}
void MSP430InstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
raw_ostream &O, const char *Modifier) {
assert((Modifier == nullptr || Modifier[0] == 0) && "No modifiers supported");
const MCOperand &Op = MI->getOperand(OpNo);
if (Op.isReg()) {
O << getRegisterName(Op.getReg());
} else if (Op.isImm()) {
O << '#' << Op.getImm();
} else {
assert(Op.isExpr() && "unknown operand kind in printOperand");
O << '#' << *Op.getExpr();
}
}
void MSP430InstPrinter::printSrcMemOperand(const MCInst *MI, unsigned OpNo,
raw_ostream &O,
const char *Modifier) {
const MCOperand &Base = MI->getOperand(OpNo);
const MCOperand &Disp = MI->getOperand(OpNo+1);
// Print displacement first
// If the global address expression is a part of displacement field with a
// register base, we should not emit any prefix symbol here, e.g.
// mov.w &foo, r1
// vs
// mov.w glb(r1), r2
// Otherwise (!) msp430-as will silently miscompile the output :(
if (!Base.getReg())
O << '&';
if (Disp.isExpr())
O << *Disp.getExpr();
else {
assert(Disp.isImm() && "Expected immediate in displacement field");
O << Disp.getImm();
}
// Print register base field
if (Base.getReg())
O << '(' << getRegisterName(Base.getReg()) << ')';
}
void MSP430InstPrinter::printCCOperand(const MCInst *MI, unsigned OpNo,
raw_ostream &O) {
unsigned CC = MI->getOperand(OpNo).getImm();
switch (CC) {
default:
llvm_unreachable("Unsupported CC code");
case MSP430CC::COND_E:
O << "eq";
break;
case MSP430CC::COND_NE:
O << "ne";
break;
case MSP430CC::COND_HS:
O << "hs";
break;
case MSP430CC::COND_LO:
O << "lo";
break;
case MSP430CC::COND_GE:
O << "ge";
break;
case MSP430CC::COND_L:
O << 'l';
break;
}
}
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