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// Copyright 2019 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_BIGINT_GEN_H_
#define V8_BUILTINS_BUILTINS_BIGINT_GEN_H_
#include "src/codegen/code-stub-assembler.h"
#include "src/objects/bigint.h"
namespace v8 {
namespace internal {
class BigIntBuiltinsAssembler : public CodeStubAssembler {
public:
explicit BigIntBuiltinsAssembler(compiler::CodeAssemblerState* state)
: CodeStubAssembler(state) {}
TNode<IntPtrT> ReadBigIntLength(TNode<BigInt> value) {
TNode<Word32T> bitfield = LoadBigIntBitfield(value);
return ChangeInt32ToIntPtr(
Signed(DecodeWord32<BigIntBase::LengthBits>(bitfield)));
}
TNode<Uint32T> ReadBigIntSign(TNode<BigInt> value) {
TNode<Word32T> bitfield = LoadBigIntBitfield(value);
return DecodeWord32<BigIntBase::SignBits>(bitfield);
}
void WriteBigIntSignAndLength(TNode<BigInt> bigint, TNode<Uint32T> sign,
TNode<IntPtrT> length) {
STATIC_ASSERT(BigIntBase::SignBits::kShift == 0);
TNode<Uint32T> bitfield = Unsigned(
Word32Or(Word32Shl(TruncateIntPtrToInt32(length),
Int32Constant(BigIntBase::LengthBits::kShift)),
Word32And(sign, Int32Constant(BigIntBase::SignBits::kMask))));
StoreBigIntBitfield(bigint, bitfield);
}
void CppAbsoluteAddAndCanonicalize(TNode<BigInt> result, TNode<BigInt> x,
TNode<BigInt> y) {
TNode<ExternalReference> mutable_big_int_absolute_add_and_canonicalize =
ExternalConstant(
ExternalReference::
mutable_big_int_absolute_add_and_canonicalize_function());
CallCFunction(mutable_big_int_absolute_add_and_canonicalize,
MachineType::AnyTagged(),
std::make_pair(MachineType::AnyTagged(), result),
std::make_pair(MachineType::AnyTagged(), x),
std::make_pair(MachineType::AnyTagged(), y));
}
void CppAbsoluteSubAndCanonicalize(TNode<BigInt> result, TNode<BigInt> x,
TNode<BigInt> y) {
TNode<ExternalReference> mutable_big_int_absolute_sub_and_canonicalize =
ExternalConstant(
ExternalReference::
mutable_big_int_absolute_sub_and_canonicalize_function());
CallCFunction(mutable_big_int_absolute_sub_and_canonicalize,
MachineType::AnyTagged(),
std::make_pair(MachineType::AnyTagged(), result),
std::make_pair(MachineType::AnyTagged(), x),
std::make_pair(MachineType::AnyTagged(), y));
}
TNode<Int32T> CppAbsoluteCompare(TNode<BigInt> x, TNode<BigInt> y) {
TNode<ExternalReference> mutable_big_int_absolute_compare =
ExternalConstant(
ExternalReference::mutable_big_int_absolute_compare_function());
TNode<Int32T> result = UncheckedCast<Int32T>(
CallCFunction(mutable_big_int_absolute_compare, MachineType::Int32(),
std::make_pair(MachineType::AnyTagged(), x),
std::make_pair(MachineType::AnyTagged(), y)));
return result;
}
};
} // namespace internal
} // namespace v8
#endif // V8_BUILTINS_BUILTINS_BIGINT_GEN_H_