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9c066e964d
Converted usage of CH-custom bit_cast to std::bit_cast if possible, i.e. when sizeof(From) == sizeof(To). (The CH-custom bit_cast is able to deal with sizeof(From) != sizeof(To).) Motivation for this came from #42847 where it is not clear how the internal bit_cast should behave on big endian systems, so we better avoid that situation as much as possible.
47 lines
1.1 KiB
C++
47 lines
1.1 KiB
C++
#include <Functions/FunctionNumericPredicate.h>
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#include <Functions/FunctionFactory.h>
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#include <type_traits>
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namespace DB
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{
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namespace
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{
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struct IsFiniteImpl
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{
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/// Better implementation, because isinf, isfinite, isnan are not inlined for unknown reason.
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/// Assuming IEEE 754.
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/// NOTE gcc 7 doesn't vectorize this loop.
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static constexpr auto name = "isFinite";
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template <typename T>
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static bool execute(const T t)
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{
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if constexpr (std::is_same_v<T, float>)
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return (std::bit_cast<uint32_t>(t)
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& 0b01111111100000000000000000000000)
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!= 0b01111111100000000000000000000000;
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else if constexpr (std::is_same_v<T, double>)
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return (std::bit_cast<uint64_t>(t)
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& 0b0111111111110000000000000000000000000000000000000000000000000000)
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!= 0b0111111111110000000000000000000000000000000000000000000000000000;
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else
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{
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(void)t;
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return true;
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}
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}
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};
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using FunctionIsFinite = FunctionNumericPredicate<IsFiniteImpl>;
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}
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REGISTER_FUNCTION(IsFinite)
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{
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factory.registerFunction<FunctionIsFinite>();
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}
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}
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