1//===-- RISCVELFStreamer.cpp - RISCV ELF Target Streamer Methods ----------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file provides RISCV specific target streamer methods.
10//
11//===----------------------------------------------------------------------===//
12
13#include "RISCVELFStreamer.h"
14#include "MCTargetDesc/RISCVAsmBackend.h"
15#include "RISCVMCTargetDesc.h"
16#include "Utils/RISCVBaseInfo.h"
17#include "llvm/BinaryFormat/ELF.h"
18#include "llvm/MC/MCSubtargetInfo.h"
19
20using namespace llvm;
21
22// This part is for ELF object output.
23RISCVTargetELFStreamer::RISCVTargetELFStreamer(MCStreamer &S,
24                                               const MCSubtargetInfo &STI)
25    : RISCVTargetStreamer(S) {
26  MCAssembler &MCA = getStreamer().getAssembler();
27  const FeatureBitset &Features = STI.getFeatureBits();
28  auto &MAB = static_cast<RISCVAsmBackend &>(MCA.getBackend());
29  RISCVABI::ABI ABI = MAB.getTargetABI();
30  assert(ABI != RISCVABI::ABI_Unknown && "Improperly initialised target ABI");
31
32  unsigned EFlags = MCA.getELFHeaderEFlags();
33
34  if (Features[RISCV::FeatureStdExtC])
35    EFlags |= ELF::EF_RISCV_RVC;
36
37  switch (ABI) {
38  case RISCVABI::ABI_ILP32:
39  case RISCVABI::ABI_LP64:
40    break;
41  case RISCVABI::ABI_ILP32F:
42  case RISCVABI::ABI_LP64F:
43    EFlags |= ELF::EF_RISCV_FLOAT_ABI_SINGLE;
44    break;
45  case RISCVABI::ABI_ILP32D:
46  case RISCVABI::ABI_LP64D:
47    EFlags |= ELF::EF_RISCV_FLOAT_ABI_DOUBLE;
48    break;
49  case RISCVABI::ABI_ILP32E:
50    EFlags |= ELF::EF_RISCV_RVE;
51    break;
52  case RISCVABI::ABI_Unknown:
53    llvm_unreachable("Improperly initialised target ABI");
54  }
55
56  MCA.setELFHeaderEFlags(EFlags);
57}
58
59MCELFStreamer &RISCVTargetELFStreamer::getStreamer() {
60  return static_cast<MCELFStreamer &>(Streamer);
61}
62
63void RISCVTargetELFStreamer::emitDirectiveOptionPush() {}
64void RISCVTargetELFStreamer::emitDirectiveOptionPop() {}
65void RISCVTargetELFStreamer::emitDirectiveOptionRVC() {}
66void RISCVTargetELFStreamer::emitDirectiveOptionNoRVC() {}
67void RISCVTargetELFStreamer::emitDirectiveOptionRelax() {}
68void RISCVTargetELFStreamer::emitDirectiveOptionNoRelax() {}
69