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Finally: after type refactoring is done give compiler opportunity to select best type for performance.

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This commit is contained in:
IRainman 2025-05-05 18:21:35 +03:00
parent d67876e2f7
commit 8721491941
3 changed files with 10 additions and 10 deletions
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4
include/fast_float/bigint.h
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@ -32,7 +32,7 @@ typedef span<limb> limb_span;
// of bits required to store the largest bigint, which is // of bits required to store the largest bigint, which is
// `log2(10**(digits + max_exp))`, or `log2(10**(767 + 342))`, or // `log2(10**(digits + max_exp))`, or `log2(10**(767 + 342))`, or
// ~3600 bits, so we round to 4000. // ~3600 bits, so we round to 4000.
typedef uint16_t bigint_bits_t; typedef uint_fast16_t bigint_bits_t;
constexpr bigint_bits_t bigint_bits = 4000; constexpr bigint_bits_t bigint_bits = 4000;
constexpr limb_t bigint_limbs = bigint_bits / limb_bits; constexpr limb_t bigint_limbs = bigint_bits / limb_bits;
@ -41,7 +41,7 @@ constexpr limb_t bigint_limbs = bigint_bits / limb_bits;
template <limb_t size> struct stackvec { template <limb_t size> struct stackvec {
limb data[size]; limb data[size];
// we never need more than 150 limbs // we never need more than 150 limbs
uint8_t length{0}; uint_fast8_t length{0};
FASTFLOAT_CONSTEXPR20 stackvec() noexcept = default; FASTFLOAT_CONSTEXPR20 stackvec() noexcept = default;
stackvec(stackvec const &) = delete; stackvec(stackvec const &) = delete;

4
include/fast_float/digit_comparison.h
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@ -39,7 +39,7 @@ constexpr static uint64_t powers_of_ten_uint64[] = {1UL,
// 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> template <typename UC>
fastfloat_really_inline FASTFLOAT_CONSTEXPR14 int16_t fastfloat_really_inline FASTFLOAT_CONSTEXPR14 int_fast16_t
scientific_exponent(parsed_number_string_t<UC> const &num) noexcept { scientific_exponent(parsed_number_string_t<UC> const &num) noexcept {
am_mant_t mantissa = num.mantissa; am_mant_t mantissa = num.mantissa;
am_pow_t exponent = num.exponent; am_pow_t exponent = num.exponent;
@ -116,7 +116,7 @@ fastfloat_really_inline FASTFLOAT_CONSTEXPR14 void round(adjusted_mantissa &am,
if (-am.power2 >= mantissa_shift) { if (-am.power2 >= mantissa_shift) {
// have a denormal float // have a denormal float
am_pow_t shift = -am.power2 + 1; am_pow_t shift = -am.power2 + 1;
cb(am, std::min<int16_t>(shift, 64)); cb(am, std::min<int_fast16_t>(shift, 64));
// check for round-up: if rounding-nearest carried us to the hidden bit. // check for round-up: if rounding-nearest carried us to the hidden bit.
am.power2 = (am.mantissa < am.power2 = (am.mantissa <
(am_mant_t(1) << binary_format<T>::mantissa_explicit_bits())) (am_mant_t(1) << binary_format<T>::mantissa_explicit_bits()))

12
include/fast_float/float_common.h
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@ -34,12 +34,12 @@
namespace fast_float { namespace fast_float {
// The number of digits in the mantissa. // The number of digits in the mantissa.
typedef uint16_t am_digits; typedef uint_fast16_t am_digits;
// The number of bits in the limb. // The number of bits in the limb.
typedef uint8_t limb_t; typedef uint_fast8_t limb_t;
typedef uint8_t chars_format_t; typedef uint_fast8_t chars_format_t;
enum class chars_format : chars_format_t; enum class chars_format : chars_format_t;
@ -444,13 +444,13 @@ full_multiplication(uint64_t a, uint64_t b) noexcept {
} }
// Value of the mantissa. // Value of the mantissa.
typedef uint64_t am_mant_t; typedef uint_fast64_t am_mant_t;
// Size of bits in the mantissa. // Size of bits in the mantissa.
typedef uint8_t am_bits_t; typedef uint_fast8_t am_bits_t;
// Power bias is signed for handling a denormal float // Power bias is signed for handling a denormal float
// or an invalid mantissa. // or an invalid mantissa.
typedef int16_t am_pow_t; typedef int_fast16_t am_pow_t;
// Bias so we can get the real exponent with an invalid adjusted_mantissa. // Bias so we can get the real exponent with an invalid adjusted_mantissa.
constexpr static am_pow_t invalid_am_bias = -0x8000; constexpr static am_pow_t invalid_am_bias = -0x8000;