-
--- Round the size of a local register up to the nearest word.
-{-
-UNUSED 2008-12-29
-
-slot_size :: LocalReg -> Int
-slot_size reg = slot_size' (typeWidth (localRegType reg))
--}
-
-slot_size' :: Width -> Int
-slot_size' reg = ((widthInBytes reg - 1) `div` wORD_SIZE) + 1
-
-type Assignment = (ParamLocation WordOff, WordOff, WordOff, AvailRegs)
-type SlotAssigner = Width -> Int -> AvailRegs -> Assignment
-
-assign_reg :: SlotAssigner -> CmmType -> WordOff -> AvailRegs -> Assignment
-assign_reg slot ty off avails
- | isFloatType ty = assign_float_reg slot width off avails
- | otherwise = assign_bits_reg slot width off gcp avails
- where
- width = typeWidth ty
- gcp | isGcPtrType ty = VGcPtr
- | otherwise = VNonGcPtr
-
--- Assigning a slot using negative offsets from the stack pointer.
--- JD: I don't know why this convention stops using all the registers
--- after running out of one class of registers, but that's how it is.
-assign_slot_neg :: SlotAssigner
-assign_slot_neg width off _regs =
- (StackParam $ off, off + size, size, ([], [], [], [])) where size = slot_size' width
-
--- Assigning a slot using positive offsets into a CallArea.
-assign_slot_pos :: SlotAssigner
-assign_slot_pos width off _regs =
- (StackParam $ off, off - size, size, ([], [], [], []))
- where size = slot_size' width
-
--- On calls in the native convention, `node` is used to hold the environment
--- for the closure, so we can't pass arguments in that register.
-assign_bits_reg :: SlotAssigner -> Width -> WordOff -> VGcPtr -> AvailRegs -> Assignment
-assign_bits_reg _ W128 _ _ _ = panic "W128 is not a supported register type"
-assign_bits_reg _ w off gcp (v:vs, fs, ds, ls)
- | widthInBits w <= widthInBits wordWidth =
- (RegisterParam (v gcp), off, 0, (vs, fs, ds, ls))
-assign_bits_reg _ w off _ (vs, fs, ds, l:ls)
- | widthInBits w > widthInBits wordWidth =
- (RegisterParam l, off, 0, (vs, fs, ds, ls))
-assign_bits_reg assign_slot w off _ regs@(_, _, _, _) = assign_slot w off regs
-
-assign_float_reg :: SlotAssigner -> Width -> WordOff -> AvailRegs -> Assignment
-assign_float_reg _ W32 off (vs, f:fs, ds, ls) = (RegisterParam $ f, off, 0, (vs, fs, ds, ls))
-assign_float_reg _ W64 off (vs, fs, d:ds, ls) = (RegisterParam $ d, off, 0, (vs, fs, ds, ls))
-assign_float_reg _ W80 _ _ = panic "F80 is not a supported register type"
-assign_float_reg assign_slot width off r = assign_slot width off r