xvm/compile/wabt/src/opcode.cc

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/*
 * Copyright 2017 WebAssembly Community Group participants
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "src/opcode.h"

#include "src/feature.h"

namespace wabt {

// static
Opcode::Info Opcode::infos_[] = {
#define WABT_OPCODE(rtype, type1, type2, type3, mem_size, prefix, code, Name, \
                    text)                                                     \
  {text,        Type::rtype, Type::type1,                                     \
   Type::type2, Type::type3, mem_size,                                        \
   prefix,      code,        PrefixCode(prefix, code)},
#include "src/opcode.def"
#undef WABT_OPCODE

    {"<invalid>", Type::Void, Type::Void, Type::Void, Type::Void, 0, 0, 0, 0},
};

#define WABT_OPCODE(rtype, type1, type2, type3, mem_size, prefix, code, Name, \
                    text)                                                     \
  /* static */ Opcode Opcode::Name##_Opcode(Opcode::Name);
#include "src/opcode.def"
#undef WABT_OPCODE

Opcode::Info Opcode::GetInfo() const {
  if (enum_ < Invalid) {
    return infos_[enum_];
  }

  Info invalid_info = infos_[Opcode::Invalid];
  DecodeInvalidOpcode(enum_, &invalid_info.prefix, &invalid_info.code);
  invalid_info.prefix_code = PrefixCode(invalid_info.prefix, invalid_info.code);
  return invalid_info;
}

bool Opcode::IsNaturallyAligned(Address alignment) const {
  Address opcode_align = GetMemorySize();
  return alignment == WABT_USE_NATURAL_ALIGNMENT || alignment == opcode_align;
}

Address Opcode::GetAlignment(Address alignment) const {
  if (alignment == WABT_USE_NATURAL_ALIGNMENT) {
    return GetMemorySize();