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[hash] Switch to Knuth multiplicative hash

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Wow, the old adhoc one was why the cmap test was timing out!
This commit is contained in:
Behdad Esfahbod 2023-05-10 01:11:32 -06:00
parent 0270e3e974
commit 42f4dab8db
1 changed files with 2 additions and 2 deletions
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4
src/hb-algs.hh
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@ -326,11 +326,11 @@ struct
template <typename T,
hb_enable_if (std::is_integral<T>::value && sizeof (T) <= sizeof (uint32_t))> constexpr auto
impl (const T& v, hb_priority<1>) const HB_RETURN (uint32_t, v * 131071u /* Mersenne prime */)
impl (const T& v, hb_priority<1>) const HB_RETURN (uint32_t, v * 2654435761)
template <typename T,
hb_enable_if (std::is_integral<T>::value && sizeof (T) > sizeof (uint32_t))> constexpr auto
impl (const T& v, hb_priority<1>) const HB_RETURN (uint32_t, (v ^ (v >> 32)) * 131071u /* Mersenne prime */)
impl (const T& v, hb_priority<1>) const HB_RETURN (uint32_t, (v ^ (v >> 32)) * 2654435761)
#endif
template <typename T> constexpr auto