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Merge pull request #333 from toughengineer/made_function_non-template

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Made function non-template
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Daniel Lemire 2025-09-30 10:25:59 -04:00 committed by GitHub
commit 83a4f696d7
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1 changed files with 5 additions and 7 deletions
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include/fast_float/digit_comparison.h
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@ -38,11 +38,8 @@ constexpr static uint64_t powers_of_ten_uint64[] = {1UL,
// this algorithm is not even close to optimized, but it has no practical // this algorithm is not even close to optimized, but it has no practical
// effect on performance: in order to have a faster algorithm, we'd need // effect on performance: in order to have a faster algorithm, we'd need
// to slow down performance for faster algorithms, and this is still fast. // to slow down performance for faster algorithms, and this is still fast.
template <typename UC>
fastfloat_really_inline FASTFLOAT_CONSTEXPR14 int32_t fastfloat_really_inline FASTFLOAT_CONSTEXPR14 int32_t
scientific_exponent(parsed_number_string_t<UC> &num) noexcept { scientific_exponent(uint64_t mantissa, int32_t exponent) noexcept {
uint64_t mantissa = num.mantissa;
int32_t exponent = int32_t(num.exponent);
while (mantissa >= 10000) { while (mantissa >= 10000) {
mantissa /= 10000; mantissa /= 10000;
exponent += 4; exponent += 4;
@ -398,7 +395,7 @@ inline FASTFLOAT_CONSTEXPR20 adjusted_mantissa negative_digit_comp(
FASTFLOAT_ASSERT(real_digits.pow2(uint32_t(-pow2_exp))); FASTFLOAT_ASSERT(real_digits.pow2(uint32_t(-pow2_exp)));
} }
// compare digits, and use it to director rounding // compare digits, and use it to direct rounding
int ord = real_digits.compare(theor_digits); int ord = real_digits.compare(theor_digits);
adjusted_mantissa answer = am; adjusted_mantissa answer = am;
round<T>(answer, [ord](adjusted_mantissa &a, int32_t shift) { round<T>(answer, [ord](adjusted_mantissa &a, int32_t shift) {
@ -419,7 +416,7 @@ inline FASTFLOAT_CONSTEXPR20 adjusted_mantissa negative_digit_comp(
return answer; return answer;
} }
// parse the significant digits as a big integer to unambiguously round the // parse the significant digits as a big integer to unambiguously round
// the significant digits. here, we are trying to determine how to round // the significant digits. here, we are trying to determine how to round
// an extended float representation close to `b+h`, halfway between `b` // an extended float representation close to `b+h`, halfway between `b`
// (the float rounded-down) and `b+u`, the next positive float. this // (the float rounded-down) and `b+u`, the next positive float. this
@ -438,7 +435,8 @@ digit_comp(parsed_number_string_t<UC> &num, adjusted_mantissa am) noexcept {
// remove the invalid exponent bias // remove the invalid exponent bias
am.power2 -= invalid_am_bias; am.power2 -= invalid_am_bias;
int32_t sci_exp = scientific_exponent(num); int32_t sci_exp =
scientific_exponent(num.mantissa, static_cast<int32_t>(num.exponent));
size_t max_digits = binary_format<T>::max_digits(); size_t max_digits = binary_format<T>::max_digits();
size_t digits = 0; size_t digits = 0;
bigint bigmant; bigint bigmant;