1 files changed, 101 insertions, 0 deletions
diff --git a/llvm/lib/Target/CSKY/MCTargetDesc/CSKYInstPrinter.cpp b/llvm/lib/Target/CSKY/MCTargetDesc/CSKYInstPrinter.cpp
new file mode 100644
index 000000000000..c8920fbb4b4c
--- /dev/null
+++ b/llvm/lib/Target/CSKY/MCTargetDesc/CSKYInstPrinter.cpp
@@ -0,0 +1,101 @@
+//===-- CSKYInstPrinter.cpp - Convert CSKY MCInst to asm 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 CSKY MCInst to a .s file.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CSKYInstPrinter.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/FormattedStream.h"
+
+using namespace llvm;
+
+#define DEBUG_TYPE "csky-asm-printer"
+
+// Include the auto-generated portion of the assembly writer.
+#define PRINT_ALIAS_INSTR
+#include "CSKYGenAsmWriter.inc"
+
+static cl::opt<bool>
+    NoAliases("csky-no-aliases",
+              cl::desc("Disable the emission of assembler pseudo instructions"),
+              cl::init(false), cl::Hidden);
+
+static cl::opt<bool>
+    ArchRegNames("csky-arch-reg-names",
+                 cl::desc("Print architectural register names rather than the "
+                          "ABI names (such as r14 instead of sp)"),
+                 cl::init(false), cl::Hidden);
+
+// The command-line flags above are used by llvm-mc and llc. They can be used by
+// `llvm-objdump`, but we override their values here to handle options passed to
+// `llvm-objdump` with `-M` (which matches GNU objdump). There did not seem to
+// be an easier way to allow these options in all these tools, without doing it
+// this way.
+bool CSKYInstPrinter::applyTargetSpecificCLOption(StringRef Opt) {
+  if (Opt == "no-aliases") {
+    NoAliases = true;
+    return true;
+  }
+  if (Opt == "numeric") {
+    ArchRegNames = true;
+    return true;
+  }
+
+  return false;
+}
+
+void CSKYInstPrinter::printInst(const MCInst *MI, uint64_t Address,
+                                StringRef Annot, const MCSubtargetInfo &STI,
+                                raw_ostream &O) {
+  const MCInst *NewMI = MI;
+
+  if (NoAliases || !printAliasInstr(NewMI, Address, STI, O))
+    printInstruction(NewMI, Address, STI, O);
+  printAnnotation(O, Annot);
+}
+
+void CSKYInstPrinter::printRegName(raw_ostream &O, unsigned RegNo) const {
+  O << getRegisterName(RegNo);
+}
+
+void CSKYInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
+                                   const MCSubtargetInfo &STI, raw_ostream &O,
+                                   const char *Modifier) {
+  assert((Modifier == 0 || Modifier[0] == 0) && "No modifiers supported");
+  const MCOperand &MO = MI->getOperand(OpNo);
+
+  if (MO.isReg()) {
+    if (MO.getReg() == CSKY::C)
+      O << "";
+    else
+      printRegName(O, MO.getReg());
+    return;
+  }
+
+  if (MO.isImm()) {
+    O << formatImm(MO.getImm());
+    return;
+  }
+
+  assert(MO.isExpr() && "Unknown operand kind in printOperand");
+  MO.getExpr()->print(O, &MAI);
+}
+
+const char *CSKYInstPrinter::getRegisterName(unsigned RegNo) {
+  return getRegisterName(RegNo, ArchRegNames ? CSKY::NoRegAltName
+                                             : CSKY::ABIRegAltName);
+}