61fb6700a5
For some targets, there is a circular dependency between InstPrinter and MCTargetDesc. Merging them together will fix this. For the other targets, the merging is to maintain consistency so all targets will have the same structure. llvm-svn: 360498
138 lines
4.1 KiB
C++
138 lines
4.1 KiB
C++
//===-- MSP430InstPrinter.cpp - Convert MSP430 MCInst to assembly syntax --===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This class prints an MSP430 MCInst to a .s file.
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//
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//===----------------------------------------------------------------------===//
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#include "MSP430InstPrinter.h"
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#include "MSP430.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCInst.h"
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#include "llvm/MC/MCInstrInfo.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/FormattedStream.h"
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using namespace llvm;
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#define DEBUG_TYPE "asm-printer"
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// Include the auto-generated portion of the assembly writer.
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#define PRINT_ALIAS_INSTR
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#include "MSP430GenAsmWriter.inc"
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void MSP430InstPrinter::printInst(const MCInst *MI, raw_ostream &O,
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StringRef Annot, const MCSubtargetInfo &STI) {
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if (!printAliasInstr(MI, O))
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printInstruction(MI, O);
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printAnnotation(O, Annot);
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}
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void MSP430InstPrinter::printPCRelImmOperand(const MCInst *MI, unsigned OpNo,
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raw_ostream &O) {
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const MCOperand &Op = MI->getOperand(OpNo);
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if (Op.isImm()) {
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int64_t Imm = Op.getImm() * 2 + 2;
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O << "$";
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if (Imm >= 0)
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O << '+';
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O << Imm;
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} else {
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assert(Op.isExpr() && "unknown pcrel immediate operand");
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Op.getExpr()->print(O, &MAI);
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}
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}
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void MSP430InstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
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raw_ostream &O, const char *Modifier) {
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assert((Modifier == nullptr || Modifier[0] == 0) && "No modifiers supported");
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const MCOperand &Op = MI->getOperand(OpNo);
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if (Op.isReg()) {
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O << getRegisterName(Op.getReg());
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} else if (Op.isImm()) {
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O << '#' << Op.getImm();
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} else {
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assert(Op.isExpr() && "unknown operand kind in printOperand");
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O << '#';
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Op.getExpr()->print(O, &MAI);
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}
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}
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void MSP430InstPrinter::printSrcMemOperand(const MCInst *MI, unsigned OpNo,
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raw_ostream &O,
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const char *Modifier) {
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const MCOperand &Base = MI->getOperand(OpNo);
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const MCOperand &Disp = MI->getOperand(OpNo+1);
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// Print displacement first
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// If the global address expression is a part of displacement field with a
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// register base, we should not emit any prefix symbol here, e.g.
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// mov.w &foo, r1
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// vs
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// mov.w glb(r1), r2
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// Otherwise (!) msp430-as will silently miscompile the output :(
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if (Base.getReg() == MSP430::SR)
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O << '&';
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if (Disp.isExpr())
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Disp.getExpr()->print(O, &MAI);
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else {
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assert(Disp.isImm() && "Expected immediate in displacement field");
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O << Disp.getImm();
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}
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// Print register base field
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if ((Base.getReg() != MSP430::SR) &&
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(Base.getReg() != MSP430::PC))
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O << '(' << getRegisterName(Base.getReg()) << ')';
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}
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void MSP430InstPrinter::printIndRegOperand(const MCInst *MI, unsigned OpNo,
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raw_ostream &O) {
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const MCOperand &Base = MI->getOperand(OpNo);
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O << "@" << getRegisterName(Base.getReg());
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}
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void MSP430InstPrinter::printPostIndRegOperand(const MCInst *MI, unsigned OpNo,
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raw_ostream &O) {
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const MCOperand &Base = MI->getOperand(OpNo);
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O << "@" << getRegisterName(Base.getReg()) << "+";
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}
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void MSP430InstPrinter::printCCOperand(const MCInst *MI, unsigned OpNo,
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raw_ostream &O) {
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unsigned CC = MI->getOperand(OpNo).getImm();
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switch (CC) {
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default:
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llvm_unreachable("Unsupported CC code");
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case MSP430CC::COND_E:
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O << "eq";
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break;
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case MSP430CC::COND_NE:
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O << "ne";
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break;
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case MSP430CC::COND_HS:
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O << "hs";
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break;
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case MSP430CC::COND_LO:
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O << "lo";
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break;
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case MSP430CC::COND_GE:
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O << "ge";
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break;
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case MSP430CC::COND_L:
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O << 'l';
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break;
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case MSP430CC::COND_N:
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O << 'n';
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break;
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}
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}
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