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/*
* Copyright (C) 2022 Igalia S.L. All rights reserved.
* Copyright (C) 2023-2025 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.
*/
#pragma once
#if ENABLE(WEBASSEMBLY)
#include "HeapCellInlines.h"
#include "JSWebAssemblyArray.h"
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
namespace JSC {
TypeInfoBlob JSWebAssemblyArray::typeInfoBlob()
{
return TypeInfoBlob(0, TypeInfo(WebAssemblyGCObjectType, StructureFlags));
}
WebAssemblyGCStructure* JSWebAssemblyArray::createStructure(VM& vm, JSGlobalObject* globalObject, Ref<const Wasm::TypeDefinition>&& type, Ref<const Wasm::RTT>&& rtt)
{
RELEASE_ASSERT(type->is<Wasm::ArrayType>());
RELEASE_ASSERT(rtt->kind() == Wasm::RTTKind::Array);
return WebAssemblyGCStructure::create(vm, globalObject, TypeInfo(WebAssemblyGCObjectType, StructureFlags), info(), WTFMove(type), WTFMove(rtt));
}
template<typename T>
std::span<T> JSWebAssemblyArray::span()
{
ASSERT(sizeof(T) == elementType().type.elementSize());
uint8_t* data = this->data();
if constexpr (std::is_same_v<T, v128_t>)
data += isPreciseAllocation() ? 0 : v128AlignmentShift;
else
ASSERT(!needsAlignmentCheck(elementType().type));
ASSERT(data == this->bytes().data());
return { std::bit_cast<T*>(data), size() };
}
std::span<uint64_t> JSWebAssemblyArray::refTypeSpan()
{
ASSERT(elementsAreRefTypes());
return span<uint64_t>();
}
std::span<uint8_t> JSWebAssemblyArray::bytes()
{
if (!needsAlignmentCheck(elementType().type) || isPreciseAllocation())
return { data(), sizeInBytes() };
return { data() + v128AlignmentShift, sizeInBytes() };
}
auto JSWebAssemblyArray::visitSpan(auto functor)
{
Wasm::StorageType type = elementType().type;
if (type.is<Wasm::PackedType>()) {
switch (type.as<Wasm::PackedType>()) {
case Wasm::PackedType::I8:
return functor(span<uint8_t>());
case Wasm::PackedType::I16:
return functor(span<uint16_t>());
}
}
// m_element_type must be a type, so we can get its kind
ASSERT(type.is<Wasm::Type>());
switch (type.as<Wasm::Type>().kind) {
case Wasm::TypeKind::I32:
case Wasm::TypeKind::F32:
return functor(span<uint32_t>());
case Wasm::TypeKind::V128:
return functor(span<v128_t>());
default:
return functor(span<uint64_t>());
}
}
auto JSWebAssemblyArray::visitSpanNonVector(auto functor)
{
// Ideally this would have just been:
// return visitSpan([&][&]<typename T>(std::span<T> span) { RELEASE_ASSERT(!std::is_same<T, v128_t>::value); ... });
// but that causes weird compiler errors...
Wasm::StorageType type = elementType().type;
if (type.is<Wasm::PackedType>()) {
switch (type.as<Wasm::PackedType>()) {
case Wasm::PackedType::I8:
return functor(span<uint8_t>());
case Wasm::PackedType::I16:
return functor(span<uint16_t>());
}
}
// m_element_type must be a type, so we can get its kind
ASSERT(type.is<Wasm::Type>());
switch (type.as<Wasm::Type>().kind) {
case Wasm::TypeKind::I32:
case Wasm::TypeKind::F32:
return functor(span<uint32_t>());
case Wasm::TypeKind::V128:
RELEASE_ASSERT_NOT_REACHED();
default:
return functor(span<uint64_t>());
}
}
uint64_t JSWebAssemblyArray::get(uint32_t index)
{
// V128 is not supported in IPInt.
return visitSpanNonVector([&](auto span) ALWAYS_INLINE_LAMBDA -> uint64_t {
return span[index];
});
}
v128_t JSWebAssemblyArray::getVector(uint32_t index)
{
ASSERT(elementType().type.unpacked().isV128());
return span<v128_t>()[index];
}
void JSWebAssemblyArray::set(VM& vm, uint32_t index, uint64_t value)
{
visitSpanNonVector([&]<typename T>(std::span<T> span) ALWAYS_INLINE_LAMBDA {
span[index] = static_cast<T>(value);
if (elementsAreRefTypes())
vm.writeBarrier(this);
});
}
void JSWebAssemblyArray::set(VM&, uint32_t index, v128_t value)
{
ASSERT(elementType().type.as<Wasm::Type>().kind == Wasm::TypeKind::V128);
span<v128_t>()[index] = value;
}
} // namespace JSC
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
#endif // ENABLE(WEBASSEMBLY)
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