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Copy pathWasmFunctionIPIntMetadataGenerator.cpp
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141 lines (124 loc) · 5.06 KB
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/*
* Copyright (C) 2019-2021 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "WasmFunctionIPIntMetadataGenerator.h"
#include <numeric>
#if ENABLE(WEBASSEMBLY)
namespace JSC {
namespace Wasm {
unsigned FunctionIPIntMetadataGenerator::addSignature(const TypeDefinition& signature)
{
unsigned index = m_signatures.size();
m_signatures.append(&signature);
return index;
}
void FunctionIPIntMetadataGenerator::addBlankSpace(uint32_t size)
{
m_metadata.resize(m_metadata.size() + size);
}
void FunctionIPIntMetadataGenerator::addRawValue(uint64_t value)
{
auto size = m_metadata.size();
m_metadata.resize(m_metadata.size() + 8);
WRITE_TO_METADATA(m_metadata.data() + size, value, uint64_t);
}
void FunctionIPIntMetadataGenerator::addLEB128ConstantInt32AndLength(uint32_t value, uint32_t length)
{
size_t size = m_metadata.size();
m_metadata.resize(size + 5);
WRITE_TO_METADATA(m_metadata.data() + size, length, uint8_t);
WRITE_TO_METADATA(m_metadata.data() + size + 1, value, uint32_t);
}
void FunctionIPIntMetadataGenerator::addCondensedLocalIndexAndLength(uint32_t index, uint32_t length)
{
size_t size = m_metadata.size();
if (length == 2) {
m_metadata.resize(size + 1);
WRITE_TO_METADATA(m_metadata.data() + size, 0, uint8_t);
} else {
m_metadata.resize(size + 5);
WRITE_TO_METADATA(m_metadata.data() + size, length, uint8_t);
WRITE_TO_METADATA(m_metadata.data() + size + 1, index, uint32_t);
}
}
void FunctionIPIntMetadataGenerator::addLEB128ConstantAndLengthForType(Type type, uint64_t value, uint32_t length)
{
// Metadata format:
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
// I32: <value> <length>
// I64: < value > < length >
// F32: <value> <blank>
// F64: < value >
if (type.isI32()) {
size_t size = m_metadata.size();
if (length == 2) {
m_metadata.resize(size + 1);
WRITE_TO_METADATA(m_metadata.data() + size, (value >> 7) & 1, uint8_t);
} else {
m_metadata.resize(size + 5);
WRITE_TO_METADATA(m_metadata.data() + size, static_cast<uint8_t>(length), uint8_t);
WRITE_TO_METADATA(m_metadata.data() + size + 1, static_cast<uint32_t>(value), uint32_t);
}
} else if (type.isI64()) {
size_t size = m_metadata.size();
m_metadata.resize(size + 9);
WRITE_TO_METADATA(m_metadata.data() + size, static_cast<uint8_t>(length), uint8_t);
WRITE_TO_METADATA(m_metadata.data() + size + 1, static_cast<uint64_t>(value), uint64_t);
} else if (type.isFuncref()) {
size_t size = m_metadata.size();
m_metadata.resize(size + 5);
WRITE_TO_METADATA(m_metadata.data() + size, static_cast<uint8_t>(length), uint8_t);
WRITE_TO_METADATA(m_metadata.data() + size + 1, static_cast<uint32_t>(value), uint32_t);
} else if (!type.isF32() && !type.isF64())
ASSERT_NOT_IMPLEMENTED_YET();
}
void FunctionIPIntMetadataGenerator::addReturnData(const Vector<Type, 16>& types)
{
const int returnGPRs = 2;
const int returnFPRs = 1;
// uINT: the interpreter smaller than mINT
// 0x00: r0
// 0x01: r1
// 0x02: fr0
// 0x03: stack (TODO)
// 0x04: return
Vector<uint8_t, 16> uINTBytecode;
int gprsUsed = 0;
int fprsUsed = 0;
for (size_t i = 0; i < types.size(); ++i) {
auto type = types[i];
if ((type.isI32() || type.isI64()) && gprsUsed != returnGPRs)
uINTBytecode.append(gprsUsed++);
else if ((type.isF32() || type.isF64()) && fprsUsed != returnFPRs)
uINTBytecode.append(2 + fprsUsed++);
else
uINTBytecode.append(0x03);
}
uINTBytecode.append(0x04);
m_returnMetadata = m_metadata.size();
m_metadata.appendVector(uINTBytecode);
}
} }
#endif // ENABLE(WEBASSEMBLY)