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MCOL-4361 Replace pow(10.0, (double)scale) expressions with a static dictionary lookup.

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This commit is contained in:
Alexander Barkov
2021-04-09 12:14:41 +04:00
parent fd720bfd7d
commit 362bfcd15e
13 changed files with 153 additions and 132 deletions
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21
datatypes/mcs_decimal.h
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@ -195,6 +195,14 @@ public:
};
template<typename T>
T applySignedScale(const T & val, int32_t scale)
{
return scale < 0 ?
val / datatypes::scaleDivisor<T>((uint32_t) -scale) :
val * datatypes::scaleDivisor<T>((uint32_t) scale);
}
/**
@brief The function to produce scale multiplier/divisor for
wide decimals.
@ -267,6 +275,14 @@ public:
{
return DecomposedDecimal<int64_t>(value, scale).toSIntCeil();
}
// Convert to an arbitrary floating point data type,
// e.g. float, double, long double
template<typename T>
T toXFloat(uint32_t scale) const
{
return (T) value / scaleDivisor<T>(scale);
}
};
@ -590,6 +606,11 @@ class Decimal: public TDecimal128, public TDecimal64
return TDecimal64::toUInt64Round((uint32_t) scale);
}
template<typename T> T decimal64ToXFloat() const
{
return TDecimal64::toXFloat<T>((uint32_t) scale);
}
int64_t toSInt64Round() const
{
return isWideDecimalTypeByPrecision(precision) ?