Hello All, I currently try to get a ghc port on mips-linux going. I understand Igloo does the same ATM, and things look promising so far. However, the port is currently unregisterised, and I would like to improve it a bit. A registerised port seems to be achievable with a moderate amount of work. I looked a bit around in the code, and have now a few questions: - The example of other ports suggests the useful maximum of general purpose registers for GHC is 8. I also presume that unmentioned registers aren't touched by haskell code. Is this correct? - The comments in the source suggest that callee-saved registers are preferable, without further explanation. I would expect a mix of caller- and callee-saved registers to be potentially better. Any advice on this? - The mips ABI defines 8 (or 9 when including the frame pointer) registers as callee-saved, and more than 9 caller-saved temporaries. With four registers taken for stack/heap pointers this leaves a 5/3 split of callee-saved/caller-saved registers, if all my assumptions above are ok. Are there other considerations to take into account for the register layout? Thiemo