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Lua 5.3 introduced actual 64 bit integers but those probably will never get in LuaJIT because its deeply married to the NaN tagging trick, which limits unboxed

by ufo 8y ago

Lua 5.3 introduced actual 64 bit integers but those probably will never get in LuaJIT because its deeply married to the NaN tagging trick, which limits unboxed values to aprox 48 bits.

samatman 8y ago
You're thinking of the 47 bit address space limitation. LuaJIT represents the full range of valid 64 bit floats faithfully, giving a 52 bit signed int.
- ufo 8y ago
  Either way, it cant represent 64 bit integers unless they are boxed (which is very slow)