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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 <algorithm>
#include "src/feature.h"
namespace wabt {
// static
Opcode::Info Opcode::infos_[] = {
#define WABT_OPCODE(rtype, type1, type2, mem_size, prefix, code, Name, text) \
{text, Type::rtype, Type::type1, Type::type2, \
mem_size, prefix, code, PrefixCode(prefix, code)},
#include "src/opcode.def"
#undef WABT_OPCODE
};
#define WABT_OPCODE(rtype, type1, type2, mem_size, prefix, code, Name, text) \
/* static */ Opcode Opcode::Name##_Opcode(Opcode::Name);
#include "src/opcode.def"
#undef WABT_OPCODE
// static
Opcode::Info Opcode::invalid_info_ = {
"<invalid>", Type::Void, Type::Void, Type::Void, 0, 0, 0, 0,
};
// static
Opcode Opcode::FromCode(uint32_t code) {
return FromCode(0, code);
}
// static
Opcode Opcode::FromCode(uint8_t prefix, uint32_t code) {
uint32_t prefix_code = PrefixCode(prefix, code);
auto iter =
std::lower_bound(infos_, infos_ + WABT_ARRAY_SIZE(infos_), prefix_code,
[](const Info& info, uint32_t prefix_code) {
return info.prefix_code < prefix_code;
});
if (iter->prefix_code != prefix_code)
return Opcode(Invalid);
return Opcode(static_cast<Enum>(iter - infos_));
}
Opcode::Info Opcode::GetInfo() const {
return enum_ < Invalid ? infos_[enum_] : 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();
return alignment;
}
bool Opcode::IsEnabled(const Features& features) const {
switch (enum_) {
case Opcode::Try:
case Opcode::Catch:
case Opcode::Throw:
case Opcode::Rethrow:
case Opcode::CatchAll:
return features.exceptions_enabled();
case Opcode::I32TruncSSatF32:
case Opcode::I32TruncUSatF32:
case Opcode::I32TruncSSatF64:
case Opcode::I32TruncUSatF64:
case Opcode::I64TruncSSatF32:
case Opcode::I64TruncUSatF32:
case Opcode::I64TruncSSatF64:
case Opcode::I64TruncUSatF64:
return features.sat_float_to_int_enabled();
case Opcode::I32Extend8S:
case Opcode::I32Extend16S:
case Opcode::I64Extend8S:
case Opcode::I64Extend16S:
case Opcode::I64Extend32S:
return features.threads_enabled();
// Interpreter opcodes are never "enabled".
case Opcode::InterpreterAlloca:
case Opcode::InterpreterBrUnless:
case Opcode::InterpreterCallHost:
case Opcode::InterpreterData:
case Opcode::InterpreterDropKeep:
return false;
default:
return true;
}
}
} // end anonymous namespace
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