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//===-- MSP430InstPrinter.cpp - Convert MSP430 MCInst to assembly syntax --===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// 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/MC/MCInstrInfo.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.
#define PRINT_ALIAS_INSTR
#include "MSP430GenAsmWriter.inc"
void MSP430InstPrinter::printInst(const MCInst *MI, raw_ostream &O,
StringRef Annot, const MCSubtargetInfo &STI) {
if (!printAliasInstr(MI, O))
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()) {
int64_t Imm = Op.getImm() * 2 + 2;
O << "$";
if (Imm >= 0)
O << '+';
O << Imm;
} else {
assert(Op.isExpr() && "unknown pcrel immediate operand");
Op.getExpr()->print(O, &MAI);
}
}
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()->print(O, &MAI);
}
}
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() == MSP430::SR)
O << '&';
if (Disp.isExpr())
Disp.getExpr()->print(O, &MAI);
else {
assert(Disp.isImm() && "Expected immediate in displacement field");
O << Disp.getImm();
}
// Print register base field
if ((Base.getReg() != MSP430::SR) &&
(Base.getReg() != MSP430::PC))
O << '(' << getRegisterName(Base.getReg()) << ')';
}
void MSP430InstPrinter::printIndRegOperand(const MCInst *MI, unsigned OpNo,
raw_ostream &O) {
const MCOperand &Base = MI->getOperand(OpNo);
O << "@" << getRegisterName(Base.getReg());
}
void MSP430InstPrinter::printPostIndRegOperand(const MCInst *MI, unsigned OpNo,
raw_ostream &O) {
const MCOperand &Base = MI->getOperand(OpNo);
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;
case MSP430CC::COND_N:
O << 'n';
break;
}
}
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