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Minor optimization.

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This commit is contained in:
Daniel Lemire 2022-11-18 15:33:44 -05:00
parent 3d0e448940
commit 8b7a55a03c
1 changed files with 2 additions and 1 deletions
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include/fast_float/parse_number.h
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@ -83,6 +83,7 @@ fastfloat_really_inline bool rounds_to_nearest() noexcept {
// value so that 1 + x should round to 1 would do (after accounting for excess // value so that 1 + x should round to 1 would do (after accounting for excess
// precision, as in 387). // precision, as in 387).
static volatile float fmin = std::numeric_limits<float>::min(); static volatile float fmin = std::numeric_limits<float>::min();
float fmini = fmin; // we copy it so that it gets loaded at most once.
// //
// Explanation: // Explanation:
// Only when fegetround() == FE_TONEAREST do we have that // Only when fegetround() == FE_TONEAREST do we have that
@ -105,7 +106,7 @@ fastfloat_really_inline bool rounds_to_nearest() noexcept {
// //
// Note: This may fail to be accurate if fast-math has been // Note: This may fail to be accurate if fast-math has been
// enabled, as rounding conventions may not apply. // enabled, as rounding conventions may not apply.
return (fmin + 1.0f == 1.0f - fmin); return (fmini + 1.0f == 1.0f - fmini);
} }
} // namespace detail } // namespace detail