diff options
Diffstat (limited to 'lib/Target/XCore/MCTargetDesc/XCoreInstPrinter.cpp')
-rw-r--r-- | lib/Target/XCore/MCTargetDesc/XCoreInstPrinter.cpp | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/lib/Target/XCore/MCTargetDesc/XCoreInstPrinter.cpp b/lib/Target/XCore/MCTargetDesc/XCoreInstPrinter.cpp new file mode 100644 index 000000000000..d231e0981324 --- /dev/null +++ b/lib/Target/XCore/MCTargetDesc/XCoreInstPrinter.cpp @@ -0,0 +1,89 @@ +//===-- XCoreInstPrinter.cpp - Convert XCore 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 XCore MCInst to a .s file. +// +//===----------------------------------------------------------------------===// + +#include "XCoreInstPrinter.h" +#include "llvm/ADT/StringRef.h" +#include "llvm/MC/MCExpr.h" +#include "llvm/MC/MCInst.h" +#include "llvm/MC/MCSymbol.h" +#include "llvm/Support/Casting.h" +#include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/raw_ostream.h" +#include <cassert> + +using namespace llvm; + +#define DEBUG_TYPE "asm-printer" + +#include "XCoreGenAsmWriter.inc" + +void XCoreInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const { + OS << StringRef(getRegisterName(RegNo)).lower(); +} + +void XCoreInstPrinter::printInst(const MCInst *MI, raw_ostream &O, + StringRef Annot, const MCSubtargetInfo &STI) { + printInstruction(MI, O); + printAnnotation(O, Annot); +} + +void XCoreInstPrinter:: +printInlineJT(const MCInst *MI, int opNum, raw_ostream &O) { + report_fatal_error("can't handle InlineJT"); +} + +void XCoreInstPrinter:: +printInlineJT32(const MCInst *MI, int opNum, raw_ostream &O) { + report_fatal_error("can't handle InlineJT32"); +} + +static void printExpr(const MCExpr *Expr, const MCAsmInfo *MAI, + raw_ostream &OS) { + int Offset = 0; + const MCSymbolRefExpr *SRE; + + if (const MCBinaryExpr *BE = dyn_cast<MCBinaryExpr>(Expr)) { + SRE = dyn_cast<MCSymbolRefExpr>(BE->getLHS()); + const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(BE->getRHS()); + assert(SRE && CE && "Binary expression must be sym+const."); + Offset = CE->getValue(); + } else { + SRE = dyn_cast<MCSymbolRefExpr>(Expr); + assert(SRE && "Unexpected MCExpr type."); + } + assert(SRE->getKind() == MCSymbolRefExpr::VK_None); + + SRE->getSymbol().print(OS, MAI); + + if (Offset) { + if (Offset > 0) + OS << '+'; + OS << Offset; + } +} + +void XCoreInstPrinter:: +printOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O) { + const MCOperand &Op = MI->getOperand(OpNo); + if (Op.isReg()) { + printRegName(O, Op.getReg()); + return; + } + + if (Op.isImm()) { + O << Op.getImm(); + return; + } + + assert(Op.isExpr() && "unknown operand kind in printOperand"); + printExpr(Op.getExpr(), &MAI, O); +} |