// 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<Uint8T> LoadUint8(TNode<RawPtrT> data_pointer, TNode<UintPtrT> offset) { return UncheckedCast<Uint8T>( Load(MachineType::Uint8(), data_pointer, offset)); } TNode<Int8T> LoadInt8(TNode<RawPtrT> data_pointer, TNode<UintPtrT> offset) { return UncheckedCast<Int8T>( 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_