coffee/fast_float
1
0
Fork 0
mirror of https://github.com/fastfloat/fast_float.git synced 2025-12-07 01:06:48 +08:00
Code Issues Packages Projects Releases Wiki Activity

reduce registers pressure.

Browse Source
This commit is contained in:
IRainman 2025-03-28 20:29:25 +03:00
parent 6aea2fb2e5
commit ee620a029d
1 changed files with 16 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
include/fast_float/float_common.h
View File

@ -427,10 +427,12 @@ struct adjusted_mantissa {
int32_t power2; // a negative value indicates an invalid result int32_t power2; // a negative value indicates an invalid result
adjusted_mantissa() noexcept = default; adjusted_mantissa() noexcept = default;
fastfloat_really_inline
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;
} }
fastfloat_really_inline
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;
} }
@ -447,10 +449,10 @@ template <typename T, typename U = void> struct binary_format_lookup_tables;
template <typename T> struct binary_format : binary_format_lookup_tables<T> { template <typename T> struct binary_format : binary_format_lookup_tables<T> {
using equiv_uint = equiv_uint_t<T>; using equiv_uint = equiv_uint_t<T>;
static constexpr int mantissa_explicit_bits(); static constexpr unsigned int mantissa_explicit_bits();
static constexpr int minimum_exponent(); static constexpr int minimum_exponent();
static constexpr int infinite_power(); static constexpr int infinite_power();
static constexpr int sign_index(); static constexpr unsigned int sign_index();
static constexpr int static constexpr int
min_exponent_fast_path(); // used when fegetround() == FE_TONEAREST min_exponent_fast_path(); // used when fegetround() == FE_TONEAREST
static constexpr int max_exponent_fast_path(); static constexpr int max_exponent_fast_path();
@ -462,7 +464,7 @@ template <typename T> struct binary_format : binary_format_lookup_tables<T> {
static constexpr int largest_power_of_ten(); static constexpr int largest_power_of_ten();
static constexpr int smallest_power_of_ten(); static constexpr int smallest_power_of_ten();
static constexpr T exact_power_of_ten(int64_t power); static constexpr T exact_power_of_ten(int64_t power);
static constexpr size_t max_digits(); static constexpr unsigned int max_digits();
static constexpr equiv_uint exponent_mask(); static constexpr equiv_uint exponent_mask();
static constexpr equiv_uint mantissa_mask(); static constexpr equiv_uint mantissa_mask();
static constexpr equiv_uint hidden_bit_mask(); static constexpr equiv_uint hidden_bit_mask();
@ -570,12 +572,12 @@ inline constexpr int binary_format<float>::min_exponent_fast_path() {
} }
template <> template <>
inline constexpr int binary_format<double>::mantissa_explicit_bits() { inline constexpr unsigned int binary_format<double>::mantissa_explicit_bits() {
return 52; return 52;
} }
template <> template <>
inline constexpr int binary_format<float>::mantissa_explicit_bits() { inline constexpr unsigned int binary_format<float>::mantissa_explicit_bits() {
return 23; return 23;
} }
@ -617,11 +619,11 @@ template <> inline constexpr int binary_format<float>::infinite_power() {
#ifndef FASTFLOAT_ONLY_POSITIVE_C_NUMBER_WO_INF_NAN #ifndef FASTFLOAT_ONLY_POSITIVE_C_NUMBER_WO_INF_NAN
template <> inline constexpr int binary_format<double>::sign_index() { template <> inline constexpr unsigned int binary_format<double>::sign_index() {
return 63; return 63;
} }
template <> inline constexpr int binary_format<float>::sign_index() { template <> inline constexpr unsigned int binary_format<float>::sign_index() {
return 31; return 31;
} }
@ -706,7 +708,7 @@ inline constexpr int binary_format<std::float16_t>::max_exponent_fast_path() {
} }
template <> template <>
inline constexpr int binary_format<std::float16_t>::mantissa_explicit_bits() { inline constexpr unsigned int binary_format<std::float16_t>::mantissa_explicit_bits() {
return 10; return 10;
} }
@ -755,7 +757,7 @@ inline constexpr int binary_format<std::float16_t>::infinite_power() {
#ifndef FASTFLOAT_ONLY_POSITIVE_C_NUMBER_WO_INF_NAN #ifndef FASTFLOAT_ONLY_POSITIVE_C_NUMBER_WO_INF_NAN
template <> inline constexpr int binary_format<std::float16_t>::sign_index() { template <> inline constexpr unsigned int binary_format<std::float16_t>::sign_index() {
return 15; return 15;
} }
@ -772,7 +774,7 @@ inline constexpr int binary_format<std::float16_t>::smallest_power_of_ten() {
} }
template <> template <>
inline constexpr size_t binary_format<std::float16_t>::max_digits() { inline constexpr unsigned int binary_format<std::float16_t>::max_digits() {
return 22; return 22;
} }
#endif // __STDCPP_FLOAT16_T__ #endif // __STDCPP_FLOAT16_T__
@ -833,7 +835,7 @@ binary_format<std::bfloat16_t>::hidden_bit_mask() {
} }
template <> template <>
inline constexpr int binary_format<std::bfloat16_t>::mantissa_explicit_bits() { inline constexpr unsigned int binary_format<std::bfloat16_t>::mantissa_explicit_bits() {
return 7; return 7;
} }
@ -899,7 +901,7 @@ inline constexpr int binary_format<std::bfloat16_t>::smallest_power_of_ten() {
} }
template <> template <>
inline constexpr size_t binary_format<std::bfloat16_t>::max_digits() { inline constexpr unsigned int binary_format<std::bfloat16_t>::max_digits() {
return 98; return 98;
} }
#endif // __STDCPP_BFLOAT16_T__ #endif // __STDCPP_BFLOAT16_T__
@ -954,11 +956,11 @@ template <> inline constexpr int binary_format<float>::smallest_power_of_ten() {
return -64; return -64;
} }
template <> inline constexpr size_t binary_format<double>::max_digits() { template <> inline constexpr unsigned int binary_format<double>::max_digits() {
return 769; return 769;
} }
template <> inline constexpr size_t binary_format<float>::max_digits() { template <> inline constexpr unsigned int binary_format<float>::max_digits() {
return 114; return 114;
} }