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42 lines
1.4 KiB
C++
42 lines
1.4 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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template <typename A, typename B>
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struct BitRotateLeftImpl
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{
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using ResultType = typename NumberTraits::ResultOfBit<A, B>::Type;
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template <typename Result = ResultType>
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static inline NO_SANITIZE_UNDEFINED Result apply(A a, B b)
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{
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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)
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{
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if (!left->getType()->isIntegerTy())
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throw Exception("BitRotateLeftImpl expected an integral type", ErrorCodes::LOGICAL_ERROR);
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auto * size = llvm::ConstantInt::get(left->getType(), left->getType()->getPrimitiveSizeInBits());
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/// XXX how is this supposed to behave in signed mode?
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return b.CreateOr(b.CreateShl(left, right), b.CreateLShr(left, b.CreateSub(size, right)));
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}
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#endif
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};
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struct NameBitRotateLeft { static constexpr auto name = "bitRotateLeft"; };
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using FunctionBitRotateLeft = FunctionBinaryArithmetic<BitRotateLeftImpl, NameBitRotateLeft>;
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void registerFunctionBitRotateLeft(FunctionFactory & factory)
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{
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factory.registerFunction<FunctionBitRotateLeft>();
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}
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}
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