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* additional types cleanup for speedup and reduce cache pressure.

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This commit is contained in:
IRainman 2025-04-12 19:16:25 +03:00
parent 0a18d6b329
commit 17ffdffdd9
2 changed files with 8 additions and 8 deletions
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12
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 <uint32_t bit_precision> template <uint8_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);
@ -171,7 +171,7 @@ compute_float(int64_t q, uint64_t w) noexcept {
// subnormal, but we can only know this after rounding. // subnormal, but we can only know this after rounding.
// So we only declare a subnormal if we are smaller than the threshold. // So we only declare a subnormal if we are smaller than the threshold.
answer.power2 = answer.power2 =
(answer.mantissa < (uint64_t(1) << binary::mantissa_explicit_bits())) (answer.mantissa < (am_mant_t(1) << binary::mantissa_explicit_bits()))
? 0 ? 0
: 1; : 1;
return answer; return answer;
@ -189,18 +189,18 @@ compute_float(int64_t q, uint64_t w) noexcept {
// ... we dropped out only zeroes. But if this happened, then we can go // ... we dropped out only zeroes. But if this happened, then we can go
// back!!! // back!!!
if ((answer.mantissa << shift) == product.high) { if ((answer.mantissa << shift) == product.high) {
answer.mantissa &= ~uint64_t(1); // flip it so that we do not round up answer.mantissa &= ~am_mant_t(1); // flip it so that we do not round up
} }
} }
answer.mantissa += (answer.mantissa & 1); // round up answer.mantissa += (answer.mantissa & 1); // round up
answer.mantissa >>= 1; answer.mantissa >>= 1;
if (answer.mantissa >= (uint64_t(2) << binary::mantissa_explicit_bits())) { if (answer.mantissa >= (am_mant_t(2) << binary::mantissa_explicit_bits())) {
answer.mantissa = (uint64_t(1) << binary::mantissa_explicit_bits()); answer.mantissa = (am_mant_t(1) << binary::mantissa_explicit_bits());
++answer.power2; // undo previous addition ++answer.power2; // undo previous addition
} }
answer.mantissa &= ~(uint64_t(1) << binary::mantissa_explicit_bits()); answer.mantissa &= ~(am_mant_t(1) << binary::mantissa_explicit_bits());
if (answer.power2 >= binary::infinite_power()) { // infinity if (answer.power2 >= binary::infinite_power()) { // infinity
answer.power2 = binary::infinite_power(); answer.power2 = binary::infinite_power();
answer.mantissa = 0; answer.mantissa = 0;

4
include/fast_float/float_common.h
View File

@ -1058,7 +1058,7 @@ 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
template <typename = void> struct space_lut { template <typename = void> struct space_lut {
static constexpr bool value[] = { static constexpr uint8_t value[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
@ -1074,7 +1074,7 @@ template <typename = void> struct space_lut {
#if FASTFLOAT_DETAIL_MUST_DEFINE_CONSTEXPR_VARIABLE #if FASTFLOAT_DETAIL_MUST_DEFINE_CONSTEXPR_VARIABLE
template <typename T> constexpr bool space_lut<T>::value[]; template <typename T> constexpr uint8_t space_lut<T>::value[];
#endif #endif