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Final functions call optimization.

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This commit is contained in:
IRainman 2025-05-05 19:07:55 +03:00
parent 8ccb5877bd
commit 103f22056b
6 changed files with 23 additions and 23 deletions
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12
include/fast_float/ascii_number.h
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@ -50,8 +50,8 @@ fastfloat_really_inline FASTFLOAT_CONSTEXPR20 uint64_t
read8_to_u64(UC const *chars) { read8_to_u64(UC const *chars) {
if (cpp20_and_in_constexpr() || !std::is_same<UC, char>::value) { if (cpp20_and_in_constexpr() || !std::is_same<UC, char>::value) {
uint64_t val = 0; uint64_t val = 0;
for (uint8_t i = 0; i != 8; ++i) { for (uint_fast8_t i = 0; i != 8; ++i) {
val |= uint64_t(uint8_t(*chars)) << (i * 8); val |= uint64_t(uint_fast8_t(*chars)) << (i * 8);
++chars; ++chars;
} }
return val; return val;
@ -293,7 +293,7 @@ report_parse_error(UC const *p, parse_error error) noexcept {
template <bool basic_json_fmt, typename UC> template <bool basic_json_fmt, typename UC>
fastfloat_really_inline FASTFLOAT_CONSTEXPR20 parsed_number_string_t<UC> fastfloat_really_inline FASTFLOAT_CONSTEXPR20 parsed_number_string_t<UC>
parse_number_string(UC const *p, UC const *pend, parse_number_string(UC const *p, UC const *pend,
parse_options_t<UC> const options) noexcept { parse_options_t<UC> const &options) noexcept {
// Cyclomatic complexity https://en.wikipedia.org/wiki/Cyclomatic_complexity // Cyclomatic complexity https://en.wikipedia.org/wiki/Cyclomatic_complexity
// Consider refactoring the 'parse_number_string' function. // Consider refactoring the 'parse_number_string' function.
// FASTFLOAT_ONLY_POSITIVE_C_NUMBER_WO_INF_NAN fix this. // FASTFLOAT_ONLY_POSITIVE_C_NUMBER_WO_INF_NAN fix this.
@ -507,7 +507,7 @@ parse_number_string(UC const *p, UC const *pend,
template <typename T, typename UC> template <typename T, typename UC>
fastfloat_really_inline FASTFLOAT_CONSTEXPR20 from_chars_result_t<UC> fastfloat_really_inline FASTFLOAT_CONSTEXPR20 from_chars_result_t<UC>
parse_int_string(UC const *p, UC const *pend, T &value, parse_int_string(UC const *p, UC const *pend, T &value,
parse_options_t<UC> const options) noexcept { parse_options_t<UC> const &options) noexcept {
from_chars_result_t<UC> answer; from_chars_result_t<UC> answer;
@ -549,7 +549,7 @@ parse_int_string(UC const *p, UC const *pend, T &value,
loop_parse_if_eight_digits(p, pend, i); // use SIMD if possible loop_parse_if_eight_digits(p, pend, i); // use SIMD if possible
} }
while (p != pend) { while (p != pend) {
uint8_t const digit = ch_to_digit(*p); uint_fast8_t const digit = ch_to_digit(*p);
if (digit >= options.base) { if (digit >= options.base) {
break; break;
} }
@ -574,7 +574,7 @@ parse_int_string(UC const *p, UC const *pend, T &value,
answer.ptr = p; answer.ptr = p;
// check u64 overflow // check u64 overflow
uint8_t const max_digits = max_digits_u64(options.base); uint_fast8_t const max_digits = max_digits_u64(options.base);
if (digit_count > max_digits) { if (digit_count > max_digits) {
answer.ec = std::errc::result_out_of_range; answer.ec = std::errc::result_out_of_range;
return answer; return answer;

2
include/fast_float/decimal_to_binary.h
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@ -17,7 +17,7 @@ namespace fast_float {
// most significant bits and the low part corresponding to the least significant // most significant bits and the low part corresponding to the least significant
// bits. // bits.
// //
template <uint8_t bit_precision> template <uint_fast8_t bit_precision>
fastfloat_really_inline FASTFLOAT_CONSTEXPR20 value128 fastfloat_really_inline FASTFLOAT_CONSTEXPR20 value128
compute_product_approximation(int64_t q, uint64_t w) noexcept { compute_product_approximation(int64_t q, uint64_t w) noexcept {
int const index = 2 * int(q - powers::smallest_power_of_five); int const index = 2 * int(q - powers::smallest_power_of_five);

2
include/fast_float/digit_comparison.h
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@ -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<int_fast16_t>(shift, 64)); cb(am, std::min<am_pow_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()))

2
include/fast_float/fast_float.h
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@ -43,7 +43,7 @@ from_chars(UC const *first, UC const *last, T &value,
template <typename T, typename UC = char> template <typename T, typename UC = char>
FASTFLOAT_CONSTEXPR20 from_chars_result_t<UC> FASTFLOAT_CONSTEXPR20 from_chars_result_t<UC>
from_chars_advanced(UC const *first, UC const *last, T &value, from_chars_advanced(UC const *first, UC const *last, T &value,
parse_options_t<UC> const options) noexcept; parse_options_t<UC> const &options) noexcept;
/** /**
* from_chars for integer types. * from_chars for integer types.

16
include/fast_float/float_common.h
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@ -89,7 +89,7 @@ template <typename UC> struct parse_options_t {
/** The character used as decimal point */ /** The character used as decimal point */
UC const decimal_point; UC const decimal_point;
/** The base used for integers */ /** The base used for integers */
uint8_t const base; /* only allowed from 2 to 36 */ uint_fast8_t const base; /* only allowed from 2 to 36 */
FASTFLOAT_ASSUME(base >= 2 && base <= 36); FASTFLOAT_ASSUME(base >= 2 && base <= 36);
}; };
@ -460,11 +460,11 @@ struct adjusted_mantissa {
am_pow_t power2; am_pow_t power2;
adjusted_mantissa() noexcept = default; adjusted_mantissa() noexcept = default;
constexpr bool operator==(adjusted_mantissa const &o) const noexcept { constexpr bool operator==(adjusted_mantissa const o) const noexcept {
return mantissa == o.mantissa && power2 == o.power2; return mantissa == o.mantissa && power2 == o.power2;
} }
constexpr bool operator!=(adjusted_mantissa const &o) const noexcept { constexpr bool operator!=(adjusted_mantissa const o) const noexcept {
return mantissa != o.mantissa || power2 != o.power2; return mantissa != o.mantissa || power2 != o.power2;
} }
}; };
@ -1039,7 +1039,7 @@ fastfloat_really_inline FASTFLOAT_CONSTEXPR20 void to_float(
#ifndef FASTFLOAT_ONLY_POSITIVE_C_NUMBER_WO_INF_NAN #ifndef FASTFLOAT_ONLY_POSITIVE_C_NUMBER_WO_INF_NAN
bool const negative, bool const negative,
#endif #endif
adjusted_mantissa const &am, T &value) noexcept { adjusted_mantissa const am, T &value) noexcept {
using equiv_uint = equiv_uint_t<T>; using equiv_uint = equiv_uint_t<T>;
equiv_uint word = equiv_uint(am.mantissa); equiv_uint word = equiv_uint(am.mantissa);
word = equiv_uint(word | equiv_uint(am.power2) word = equiv_uint(word | equiv_uint(am.power2)
@ -1195,18 +1195,18 @@ template <typename T> constexpr uint64_t int_luts<T>::min_safe_u64[];
#endif #endif
template <typename UC> template <typename UC>
fastfloat_really_inline constexpr uint8_t ch_to_digit(UC c) noexcept { fastfloat_really_inline constexpr uint_fast8_t ch_to_digit(UC c) noexcept {
return int_luts<>::chdigit[static_cast<unsigned char>(c)]; return int_luts<>::chdigit[static_cast<unsigned char>(c)];
} }
fastfloat_really_inline constexpr uint8_t fastfloat_really_inline constexpr uint_fast8_t
max_digits_u64(uint8_t base) noexcept { max_digits_u64(uint_fast8_t base) noexcept {
return int_luts<>::maxdigits_u64[base - 2]; return int_luts<>::maxdigits_u64[base - 2];
} }
// If a u64 is exactly max_digits_u64() in length, this is // If a u64 is exactly max_digits_u64() in length, this is
// the value below which it has definitely overflowed. // the value below which it has definitely overflowed.
fastfloat_really_inline constexpr uint64_t min_safe_u64(uint8_t base) noexcept { fastfloat_really_inline constexpr uint64_t min_safe_u64(uint_fast8_t base) noexcept {
return int_luts<>::min_safe_u64[base - 2]; return int_luts<>::min_safe_u64[base - 2];
} }

12
include/fast_float/parse_number.h
View File

@ -148,7 +148,7 @@ template <typename T> struct from_chars_caller {
template <typename UC> template <typename UC>
FASTFLOAT_CONSTEXPR20 static from_chars_result_t<UC> FASTFLOAT_CONSTEXPR20 static from_chars_result_t<UC>
call(UC const *first, UC const *last, T &value, call(UC const *first, UC const *last, T &value,
parse_options_t<UC> const options) noexcept { parse_options_t<UC> const &options) noexcept {
return from_chars_advanced(first, last, value, options); return from_chars_advanced(first, last, value, options);
} }
}; };
@ -307,7 +307,7 @@ from_chars_advanced(parsed_number_string_t<UC> const &pns, T &value) noexcept {
template <typename T, typename UC> template <typename T, typename UC>
FASTFLOAT_CONSTEXPR20 from_chars_result_t<UC> FASTFLOAT_CONSTEXPR20 from_chars_result_t<UC>
from_chars_float_advanced(UC const *first, UC const *last, T &value, from_chars_float_advanced(UC const *first, UC const *last, T &value,
parse_options_t<UC> const options) noexcept { parse_options_t<UC> const &options) noexcept {
static_assert(is_supported_float_type<T>::value, static_assert(is_supported_float_type<T>::value,
"only some floating-point types are supported"); "only some floating-point types are supported");
@ -371,7 +371,7 @@ from_chars(UC const *first, UC const *last, T &value, int const base) noexcept {
template <typename T, typename UC> template <typename T, typename UC>
FASTFLOAT_CONSTEXPR20 from_chars_result_t<UC> FASTFLOAT_CONSTEXPR20 from_chars_result_t<UC>
from_chars_int_advanced(UC const *first, UC const *last, T &value, from_chars_int_advanced(UC const *first, UC const *last, T &value,
parse_options_t<UC> const options) noexcept { parse_options_t<UC> const &options) noexcept {
static_assert(is_supported_integer_type<T>::value, static_assert(is_supported_integer_type<T>::value,
"only integer types are supported"); "only integer types are supported");
@ -407,7 +407,7 @@ template <> struct from_chars_advanced_caller<1> {
template <typename T, typename UC> template <typename T, typename UC>
FASTFLOAT_CONSTEXPR20 static from_chars_result_t<UC> FASTFLOAT_CONSTEXPR20 static from_chars_result_t<UC>
call(UC const *first, UC const *last, T &value, call(UC const *first, UC const *last, T &value,
parse_options_t<UC> const options) noexcept { parse_options_t<UC> const &options) noexcept {
return from_chars_float_advanced(first, last, value, options); return from_chars_float_advanced(first, last, value, options);
} }
}; };
@ -416,7 +416,7 @@ template <> struct from_chars_advanced_caller<2> {
template <typename T, typename UC> template <typename T, typename UC>
FASTFLOAT_CONSTEXPR20 static from_chars_result_t<UC> FASTFLOAT_CONSTEXPR20 static from_chars_result_t<UC>
call(UC const *first, UC const *last, T &value, call(UC const *first, UC const *last, T &value,
parse_options_t<UC> const options) noexcept { parse_options_t<UC> const &options) noexcept {
return from_chars_int_advanced(first, last, value, options); return from_chars_int_advanced(first, last, value, options);
} }
}; };
@ -424,7 +424,7 @@ template <> struct from_chars_advanced_caller<2> {
template <typename T, typename UC> template <typename T, typename UC>
FASTFLOAT_CONSTEXPR20 from_chars_result_t<UC> FASTFLOAT_CONSTEXPR20 from_chars_result_t<UC>
from_chars_advanced(UC const *first, UC const *last, T &value, from_chars_advanced(UC const *first, UC const *last, T &value,
parse_options_t<UC> const options) noexcept { parse_options_t<UC> const &options) noexcept {
return from_chars_advanced_caller< return from_chars_advanced_caller<
size_t(is_supported_float_type<T>::value) + size_t(is_supported_float_type<T>::value) +
2 * size_t(is_supported_integer_type<T>::value)>::call(first, last, value, 2 * size_t(is_supported_integer_type<T>::value)>::call(first, last, value,