8ba622bae1
This basic parser will handle basic instructions with register or immediate operands. With the addition of CSKYInstPrinter, we can now make use of lit tests. Differential Revision: https://reviews.llvm.org/D93798
102 lines
3.3 KiB
C++
102 lines
3.3 KiB
C++
//===-- CSKYInstPrinter.cpp - Convert CSKY 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 CSKY MCInst to a .s file.
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//
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//===----------------------------------------------------------------------===//
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#include "CSKYInstPrinter.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/MCRegisterInfo.h"
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#include "llvm/MC/MCSubtargetInfo.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/Support/CommandLine.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 "csky-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 "CSKYGenAsmWriter.inc"
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static cl::opt<bool>
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NoAliases("csky-no-aliases",
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cl::desc("Disable the emission of assembler pseudo instructions"),
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cl::init(false), cl::Hidden);
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static cl::opt<bool>
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ArchRegNames("csky-arch-reg-names",
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cl::desc("Print architectural register names rather than the "
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"ABI names (such as r14 instead of sp)"),
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cl::init(false), cl::Hidden);
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// The command-line flags above are used by llvm-mc and llc. They can be used by
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// `llvm-objdump`, but we override their values here to handle options passed to
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// `llvm-objdump` with `-M` (which matches GNU objdump). There did not seem to
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// be an easier way to allow these options in all these tools, without doing it
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// this way.
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bool CSKYInstPrinter::applyTargetSpecificCLOption(StringRef Opt) {
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if (Opt == "no-aliases") {
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NoAliases = true;
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return true;
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}
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if (Opt == "numeric") {
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ArchRegNames = true;
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return true;
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}
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return false;
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}
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void CSKYInstPrinter::printInst(const MCInst *MI, uint64_t Address,
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StringRef Annot, const MCSubtargetInfo &STI,
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raw_ostream &O) {
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const MCInst *NewMI = MI;
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if (NoAliases || !printAliasInstr(NewMI, Address, STI, O))
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printInstruction(NewMI, Address, STI, O);
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printAnnotation(O, Annot);
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}
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void CSKYInstPrinter::printRegName(raw_ostream &O, unsigned RegNo) const {
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O << getRegisterName(RegNo);
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}
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void CSKYInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
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const MCSubtargetInfo &STI, raw_ostream &O,
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const char *Modifier) {
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assert((Modifier == 0 || Modifier[0] == 0) && "No modifiers supported");
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const MCOperand &MO = MI->getOperand(OpNo);
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if (MO.isReg()) {
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if (MO.getReg() == CSKY::C)
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O << "";
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else
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printRegName(O, MO.getReg());
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return;
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}
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if (MO.isImm()) {
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O << formatImm(MO.getImm());
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return;
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}
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assert(MO.isExpr() && "Unknown operand kind in printOperand");
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MO.getExpr()->print(O, &MAI);
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}
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const char *CSKYInstPrinter::getRegisterName(unsigned RegNo) {
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return getRegisterName(RegNo, ArchRegNames ? CSKY::NoRegAltName
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: CSKY::ABIRegAltName);
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}
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