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55 lines
1.6 KiB
C++
55 lines
1.6 KiB
C++
#include <Functions/FunctionFactory.h>
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#include <Functions/FunctionBinaryArithmetic.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int NOT_IMPLEMENTED;
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extern const int LOGICAL_ERROR;
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}
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namespace
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{
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template <typename A, typename B>
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struct BitShiftRightImpl
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{
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using ResultType = typename NumberTraits::ResultOfBit<A, B>::Type;
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static const constexpr bool allow_fixed_string = false;
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template <typename Result = ResultType>
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static inline NO_SANITIZE_UNDEFINED Result apply(A a [[maybe_unused]], B b [[maybe_unused]])
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{
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if constexpr (is_big_int_v<B>)
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throw Exception("BitShiftRight is not implemented for big integers as second argument", ErrorCodes::NOT_IMPLEMENTED);
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else if constexpr (is_big_int_v<A>)
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return static_cast<Result>(a) >> static_cast<UInt32>(b);
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else
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return static_cast<Result>(a) >> static_cast<Result>(b);
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}
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#if USE_EMBEDDED_COMPILER
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static constexpr bool compilable = true;
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static inline llvm::Value * compile(llvm::IRBuilder<> & b, llvm::Value * left, llvm::Value * right, bool is_signed)
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{
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if (!left->getType()->isIntegerTy())
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throw Exception("BitShiftRightImpl expected an integral type", ErrorCodes::LOGICAL_ERROR);
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return is_signed ? b.CreateAShr(left, right) : b.CreateLShr(left, right);
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}
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#endif
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};
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struct NameBitShiftRight { static constexpr auto name = "bitShiftRight"; };
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using FunctionBitShiftRight = BinaryArithmeticOverloadResolver<BitShiftRightImpl, NameBitShiftRight>;
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}
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void registerFunctionBitShiftRight(FunctionFactory & factory)
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{
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factory.registerFunction<FunctionBitShiftRight>();
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}
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}
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