diff options
Diffstat (limited to 'st.c')
-rw-r--r-- | st.c | 9 |
1 files changed, 9 insertions, 0 deletions
@@ -1761,6 +1761,15 @@ st_numhash(st_data_t n) * - (n << 3) was finally added to avoid losing bits for fixnums * - avoid expensive modulo instructions, it is currently only * shifts and bitmask operations. + * - flonum (on 64-bit) is pathologically bad, mix the actual + * float value in, but do not use the float value as-is since + * many integers get interpreted as 2.0 or -2.0 [Bug #10761] */ +#ifdef USE_FLONUM /* RUBY */ + if (FLONUM_P(n)) { + n ^= (st_data_t)rb_float_value(n); + } +#endif + return (st_index_t)((n>>(RUBY_SPECIAL_SHIFT+3)|(n<<3)) ^ (n>>3)); } |