1#include <Functions/FunctionFactory.h>
2#include <Functions/FunctionBinaryArithmetic.h>
3
4namespace DB
5{
6
7template <typename A, typename B>
8struct BitRotateLeftImpl
9{
10 using ResultType = typename NumberTraits::ResultOfBit<A, B>::Type;
11
12 template <typename Result = ResultType>
13 static inline NO_SANITIZE_UNDEFINED Result apply(A a, B b)
14 {
15 return (static_cast<Result>(a) << static_cast<Result>(b))
16 | (static_cast<Result>(a) >> ((sizeof(Result) * 8) - static_cast<Result>(b)));
17 }
18
19#if USE_EMBEDDED_COMPILER
20 static constexpr bool compilable = true;
21
22 static inline llvm::Value * compile(llvm::IRBuilder<> & b, llvm::Value * left, llvm::Value * right, bool)
23 {
24 if (!left->getType()->isIntegerTy())
25 throw Exception("BitRotateLeftImpl expected an integral type", ErrorCodes::LOGICAL_ERROR);
26 auto * size = llvm::ConstantInt::get(left->getType(), left->getType()->getPrimitiveSizeInBits());
27 /// XXX how is this supposed to behave in signed mode?
28 return b.CreateOr(b.CreateShl(left, right), b.CreateLShr(left, b.CreateSub(size, right)));
29 }
30#endif
31};
32
33struct NameBitRotateLeft { static constexpr auto name = "bitRotateLeft"; };
34using FunctionBitRotateLeft = FunctionBinaryArithmetic<BitRotateLeftImpl, NameBitRotateLeft>;
35
36void registerFunctionBitRotateLeft(FunctionFactory & factory)
37{
38 factory.registerFunction<FunctionBitRotateLeft>();
39}
40
41}
42