* Ryan Newton: > Our heap object header is one word -- an info table pointer > <https://ghc.haskell.org/trac/ghc/wiki/Commentary/Rts/Storage/HeapObjects>. > > Well, a 64 bit info table pointer leaves *at least* 16 high bits inside the > object header for other purposes, right?
x86_64 has signed pointers, so the uppoer 16 bits are either all zero or all ones. Some systems use both, but it's rare on Linux. Other 64-bit platforms use more bits. _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
