1 // Copyright 2018 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef V8_BUILTINS_BUILTINS_DATA_VIEW_GEN_H_ 6 #define V8_BUILTINS_BUILTINS_DATA_VIEW_GEN_H_ 7 8 #include "src/codegen/code-stub-assembler.h" 9 #include "src/objects/bigint.h" 10 #include "src/objects/elements-kind.h" 11 12 namespace v8 { 13 namespace internal { 14 15 class DataViewBuiltinsAssembler : public CodeStubAssembler { 16 public: DataViewBuiltinsAssembler(compiler::CodeAssemblerState * state)17 explicit DataViewBuiltinsAssembler(compiler::CodeAssemblerState* state) 18 : CodeStubAssembler(state) {} 19 LoadUint8(TNode<RawPtrT> data_pointer,TNode<UintPtrT> offset)20 TNode<Uint8T> LoadUint8(TNode<RawPtrT> data_pointer, TNode<UintPtrT> offset) { 21 return UncheckedCast<Uint8T>( 22 Load(MachineType::Uint8(), data_pointer, offset)); 23 } 24 LoadInt8(TNode<RawPtrT> data_pointer,TNode<UintPtrT> offset)25 TNode<Int8T> LoadInt8(TNode<RawPtrT> data_pointer, TNode<UintPtrT> offset) { 26 return UncheckedCast<Int8T>( 27 Load(MachineType::Int8(), data_pointer, offset)); 28 } 29 StoreWord8(TNode<RawPtrT> data_pointer,TNode<UintPtrT> offset,TNode<Word32T> value)30 void StoreWord8(TNode<RawPtrT> data_pointer, TNode<UintPtrT> offset, 31 TNode<Word32T> value) { 32 StoreNoWriteBarrier(MachineRepresentation::kWord8, data_pointer, offset, 33 value); 34 } 35 DataViewElementSize(ElementsKind elements_kind)36 int32_t DataViewElementSize(ElementsKind elements_kind) { 37 return ElementsKindToByteSize(elements_kind); 38 } 39 DataViewEncodeBigIntBits(bool sign,int32_t digits)40 TNode<Uint32T> DataViewEncodeBigIntBits(bool sign, int32_t digits) { 41 return Unsigned(Int32Constant(BigInt::SignBits::encode(sign) | 42 BigInt::LengthBits::encode(digits))); 43 } 44 DataViewDecodeBigIntLength(TNode<BigInt> value)45 TNode<Uint32T> DataViewDecodeBigIntLength(TNode<BigInt> value) { 46 TNode<Word32T> bitfield = LoadBigIntBitfield(value); 47 return DecodeWord32<BigIntBase::LengthBits>(bitfield); 48 } 49 DataViewDecodeBigIntSign(TNode<BigInt> value)50 TNode<Uint32T> DataViewDecodeBigIntSign(TNode<BigInt> value) { 51 TNode<Word32T> bitfield = LoadBigIntBitfield(value); 52 return DecodeWord32<BigIntBase::SignBits>(bitfield); 53 } 54 }; 55 56 } // namespace internal 57 } // namespace v8 58 59 #endif // V8_BUILTINS_BUILTINS_DATA_VIEW_GEN_H_ 60