48803aa65c
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: 360494
108 lines
3.2 KiB
C++
108 lines
3.2 KiB
C++
//===-- BPFInstPrinter.cpp - Convert BPF MCInst to asm 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 BPF MCInst to a .s file.
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//
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//===----------------------------------------------------------------------===//
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#include "MCTargetDesc/BPFInstPrinter.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/MCSymbol.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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#include "BPFGenAsmWriter.inc"
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void BPFInstPrinter::printInst(const MCInst *MI, raw_ostream &O,
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StringRef Annot, const MCSubtargetInfo &STI) {
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printInstruction(MI, O);
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printAnnotation(O, Annot);
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}
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static void printExpr(const MCExpr *Expr, raw_ostream &O) {
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#ifndef NDEBUG
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const MCSymbolRefExpr *SRE;
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if (const MCBinaryExpr *BE = dyn_cast<MCBinaryExpr>(Expr))
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SRE = dyn_cast<MCSymbolRefExpr>(BE->getLHS());
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else
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SRE = dyn_cast<MCSymbolRefExpr>(Expr);
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assert(SRE && "Unexpected MCExpr type.");
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MCSymbolRefExpr::VariantKind Kind = SRE->getKind();
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assert(Kind == MCSymbolRefExpr::VK_None);
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#endif
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O << *Expr;
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}
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void BPFInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
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raw_ostream &O, const char *Modifier) {
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assert((Modifier == 0 || 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 << formatImm((int32_t)Op.getImm());
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} else {
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assert(Op.isExpr() && "Expected an expression");
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printExpr(Op.getExpr(), O);
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}
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}
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void BPFInstPrinter::printMemOperand(const MCInst *MI, int OpNo, raw_ostream &O,
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const char *Modifier) {
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const MCOperand &RegOp = MI->getOperand(OpNo);
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const MCOperand &OffsetOp = MI->getOperand(OpNo + 1);
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// register
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assert(RegOp.isReg() && "Register operand not a register");
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O << getRegisterName(RegOp.getReg());
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// offset
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if (OffsetOp.isImm()) {
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auto Imm = OffsetOp.getImm();
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if (Imm >= 0)
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O << " + " << formatImm(Imm);
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else
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O << " - " << formatImm(-Imm);
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} else {
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assert(0 && "Expected an immediate");
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}
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}
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void BPFInstPrinter::printImm64Operand(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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O << formatImm(Op.getImm());
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else if (Op.isExpr())
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printExpr(Op.getExpr(), O);
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else
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O << Op;
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}
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void BPFInstPrinter::printBrTargetOperand(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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int16_t Imm = Op.getImm();
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O << ((Imm >= 0) ? "+" : "") << formatImm(Imm);
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} else if (Op.isExpr()) {
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printExpr(Op.getExpr(), O);
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} else {
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O << Op;
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}
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}
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