llvm-6502/lib/Target/Mips/MCTargetDesc/MipsABIFlagsSection.cpp

//===-- MipsABIFlagsSection.cpp - Mips ELF ABI Flags Section ---*- C++ -*--===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "MipsABIFlagsSection.h"

using namespace llvm;

uint8_t MipsABIFlagsSection::getFpABIValue() {
  switch (FpABI) {
  case FpABIKind::ANY:
    return Mips::Val_GNU_MIPS_ABI_FP_ANY;
  case FpABIKind::SOFT:
    return Mips::Val_GNU_MIPS_ABI_FP_SOFT;
  case FpABIKind::XX:
    return Mips::Val_GNU_MIPS_ABI_FP_XX;
  case FpABIKind::S32:
    return Mips::Val_GNU_MIPS_ABI_FP_DOUBLE;
  case FpABIKind::S64:
    if (Is32BitABI)
      return OddSPReg ? Mips::Val_GNU_MIPS_ABI_FP_64
                      : Mips::Val_GNU_MIPS_ABI_FP_64A;
    return Mips::Val_GNU_MIPS_ABI_FP_DOUBLE;
  }

  llvm_unreachable("unexpected fp abi value");
}

StringRef MipsABIFlagsSection::getFpABIString(FpABIKind Value) {
  switch (Value) {
  case FpABIKind::XX:
    return "xx";
  case FpABIKind::S32:
    return "32";
  case FpABIKind::S64:
    return "64";
  default:
    llvm_unreachable("unsupported fp abi value");
  }
}

uint8_t MipsABIFlagsSection::getCPR1SizeValue() {
  if (FpABI == FpABIKind::XX)
    return (uint8_t)Mips::AFL_REG_32;
  return (uint8_t)CPR1Size;
}

namespace llvm {
MCStreamer &operator<<(MCStreamer &OS, MipsABIFlagsSection &ABIFlagsSection) {
  // Write out a Elf_Internal_ABIFlags_v0 struct
  OS.EmitIntValue(ABIFlagsSection.getVersionValue(), 2);         // version
  OS.EmitIntValue(ABIFlagsSection.getISALevelValue(), 1);        // isa_level
  OS.EmitIntValue(ABIFlagsSection.getISARevisionValue(), 1);     // isa_rev
  OS.EmitIntValue(ABIFlagsSection.getGPRSizeValue(), 1);         // gpr_size
  OS.EmitIntValue(ABIFlagsSection.getCPR1SizeValue(), 1);        // cpr1_size
  OS.EmitIntValue(ABIFlagsSection.getCPR2SizeValue(), 1);        // cpr2_size
  OS.EmitIntValue(ABIFlagsSection.getFpABIValue(), 1);           // fp_abi
  OS.EmitIntValue(ABIFlagsSection.getISAExtensionSetValue(), 4); // isa_ext
  OS.EmitIntValue(ABIFlagsSection.getASESetValue(), 4);          // ases
  OS.EmitIntValue(ABIFlagsSection.getFlags1Value(), 4);          // flags1
  OS.EmitIntValue(ABIFlagsSection.getFlags2Value(), 4);          // flags2
  return OS;
}
}