vendor/llvm-project/llvmorg-12-init-17869-g8e464dd76bef

1 files changed, 71 insertions, 0 deletions

diff --git a/llvm/lib/Target/CSKY/MCTargetDesc/CSKYMCCodeEmitter.cpp b/llvm/lib/Target/CSKY/MCTargetDesc/CSKYMCCodeEmitter.cpp
new file mode 100644
index 000000000000..ed2b0e77b81a
--- /dev/null
+++ b/llvm/lib/Target/CSKY/MCTargetDesc/CSKYMCCodeEmitter.cpp
@@ -0,0 +1,71 @@
+//===-- CSKYMCCodeEmitter.cpp - CSKY Code Emitter interface ---------------===//
+//
+// 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 file implements the CSKYMCCodeEmitter class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CSKYMCCodeEmitter.h"
+#include "MCTargetDesc/CSKYMCTargetDesc.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/MC/MCInstBuilder.h"
+#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/Support/EndianStream.h"
+
+using namespace llvm;
+
+#define DEBUG_TYPE "csky-mccode-emitter"
+
+STATISTIC(MCNumEmitted, "Number of MC instructions emitted");
+
+unsigned CSKYMCCodeEmitter::getOImmOpValue(const MCInst &MI, unsigned Idx,
+                                           SmallVectorImpl<MCFixup> &Fixups,
+                                           const MCSubtargetInfo &STI) const {
+  const MCOperand &MO = MI.getOperand(Idx);
+  assert(MO.isImm() && "Unexpected MO type.");
+  return MO.getImm() - 1;
+}
+
+void CSKYMCCodeEmitter::encodeInstruction(const MCInst &MI, raw_ostream &OS,
+                                          SmallVectorImpl<MCFixup> &Fixups,
+                                          const MCSubtargetInfo &STI) const {
+  const MCInstrDesc &Desc = MII.get(MI.getOpcode());
+  unsigned Size = Desc.getSize();
+  uint32_t Bin = getBinaryCodeForInstr(MI, Fixups, STI);
+
+  uint16_t LO16 = static_cast<uint16_t>(Bin);
+  uint16_t HI16 = static_cast<uint16_t>(Bin >> 16);
+
+  if (Size == 4)
+    support::endian::write<uint16_t>(OS, HI16, support::little);
+
+  support::endian::write<uint16_t>(OS, LO16, support::little);
+  ++MCNumEmitted; // Keep track of the # of mi's emitted.
+}
+
+unsigned
+CSKYMCCodeEmitter::getMachineOpValue(const MCInst &MI, const MCOperand &MO,
+                                     SmallVectorImpl<MCFixup> &Fixups,
+                                     const MCSubtargetInfo &STI) const {
+  if (MO.isReg())
+    return Ctx.getRegisterInfo()->getEncodingValue(MO.getReg());
+
+  if (MO.isImm())
+    return static_cast<unsigned>(MO.getImm());
+
+  llvm_unreachable("Unhandled expression!");
+  return 0;
+}
+
+MCCodeEmitter *llvm::createCSKYMCCodeEmitter(const MCInstrInfo &MCII,
+                                             const MCRegisterInfo &MRI,
+                                             MCContext &Ctx) {
+  return new CSKYMCCodeEmitter(Ctx, MCII);
+}
+
+#include "CSKYGenMCCodeEmitter.inc"