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// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_BUILTINS_BUILTINS_DATA_VIEW_GEN_H_
#define V8_BUILTINS_BUILTINS_DATA_VIEW_GEN_H_
#include "src/codegen/code-stub-assembler.h"
#include "src/objects/bigint.h"
#include "src/objects/elements-kind.h"
namespace v8 {
namespace internal {
class DataViewBuiltinsAssembler : public CodeStubAssembler {
public:
explicit DataViewBuiltinsAssembler(compiler::CodeAssemblerState* state)
: CodeStubAssembler(state) {}
TNode<Int32T> LoadUint8(TNode<RawPtrT> data_pointer, TNode<UintPtrT> offset) {
return UncheckedCast<Int32T>(
Load(MachineType::Uint8(), data_pointer, offset));
}
TNode<Int32T> LoadInt8(TNode<RawPtrT> data_pointer, TNode<UintPtrT> offset) {
return UncheckedCast<Int32T>(
Load(MachineType::Int8(), data_pointer, offset));
}
void StoreWord8(TNode<RawPtrT> data_pointer, TNode<UintPtrT> offset,
TNode<Word32T> value) {
StoreNoWriteBarrier(MachineRepresentation::kWord8, data_pointer, offset,
value);
}
int32_t DataViewElementSize(ElementsKind elements_kind) {
return ElementsKindToByteSize(elements_kind);
}
TNode<Uint32T> DataViewEncodeBigIntBits(bool sign, int32_t digits) {
return Unsigned(Int32Constant(BigInt::SignBits::encode(sign) |
BigInt::LengthBits::encode(digits)));
}
TNode<Uint32T> DataViewDecodeBigIntLength(TNode<BigInt> value) {
TNode<Word32T> bitfield = LoadBigIntBitfield(value);
return DecodeWord32<BigIntBase::LengthBits>(bitfield);
}
TNode<Uint32T> DataViewDecodeBigIntSign(TNode<BigInt> value) {
TNode<Word32T> bitfield = LoadBigIntBitfield(value);
return DecodeWord32<BigIntBase::SignBits>(bitfield);
}
};
} // namespace internal
} // namespace v8
#endif // V8_BUILTINS_BUILTINS_DATA_VIEW_GEN_H_
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