[hash] Speed-up int64 hash

2 years ago · 9cc7eb80ff
parent 826fe2c9f7
commit 9cc7eb80ff
1 changed files with 1 additions and 1 deletions
--- a/src/hb-algs.hh
+++ b/src/hb-algs.hh
@ -323,7 +323,7 @@ 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 * 8388607u) ^ ((v >> 32) * 8388607u) /* Mersenne prime */)
+  impl (const T& v, hb_priority<1>) const HB_RETURN (uint32_t, (v ^ (v >> 32)) * 8388607u /* Mersenne prime */)

  template <typename T> constexpr auto
  impl (const T& v, hb_priority<0>) const HB_RETURN (uint32_t, std::hash<hb_decay<decltype (hb_deref (v))>>{} (hb_deref (v)))