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Recover log10_2_significand

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Junekey Jeon
2022-02-08 18:36:28 -08:00
committed by Victor Zverovich
parent 10642e6082
commit 7dbe3dcded
1 changed files with 2 additions and 1 deletions
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3
include/fmt/format-inl.h
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@ -327,7 +327,8 @@ FMT_CONSTEXPR inline fp operator*(fp x, fp y) {
FMT_CONSTEXPR inline fp get_cached_power(int min_exponent, FMT_CONSTEXPR inline fp get_cached_power(int min_exponent,
int& pow10_exponent) { int& pow10_exponent) {
const int shift = 32; const int shift = 32;
const auto significand = static_cast<int64_t>(log10_2_significand); // log10(2) = 0x0.4d104d427de7fbcc...
const auto significand = static_cast<int64_t>(0x4d104d427de7fbcc);
int index = static_cast<int>( int index = static_cast<int>(
((min_exponent + fp::num_significand_bits - 1) * (significand >> shift) + ((min_exponent + fp::num_significand_bits - 1) * (significand >> shift) +
((int64_t(1) << shift) - 1)) // ceil ((int64_t(1) << shift) - 1)) // ceil