On 13 Feb 2004, Ketil Malde wrote: > Axel Simon <[EMAIL PROTECTED]> writes: > > > I wonder if such an effort is worthwhile. If all pointers are suddenly > > twice the size then the footprint of a program roughly doubles. > > [...] > > It would be interesting if Haskell programs could run in the lower 4 GB > > while running in 64 bit mode. Then you could have large data structures > > (or memory mapped files) in C land. > > That's an interesting possibility -- at least part of my program is a > large UArray of Word8, which could probably be FFI'ed relatively > easily.
... but which doesn't need to be, because UArrays of Word8 will not grow in size, no matter how large the pointers. :-) Seriously, this seems like a good approach to supporting 64 bits cheaply: put everything in the lower 4GB except for arrays. (They'd have an indirection box with a 64-bit pointer in the lower 4GB.) Does anyone need more than 4GB of non-array data? > Hmm..how about 32 bit pointers, but with 8 byte boundary alignment? > This should give an effective pointer size of 35 bits, adressing > up to 32Gb. This is also a good idea. -- Ben _______________________________________________ Haskell mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell
