Two reals are assigned FP registers in memory order

[tomeksowi]

Clarification for languages that allow structs with arbitrary user-defined field offsets.

In Ada, GCC (gnat) passes this struct with a representation clause in two FP registers assigned in memory order (B in fa0, A in fa1) so I went with that.

   type My_Struct is record
      A : Float;
      B : Float;
   end record;

   -- Reverse layout: B at 0, A at 4
   for My_Struct use record
      A at 4 range 0 .. 31;
      B at 0 range 0 .. 31;
   end record;

[kito-cheng]

LGTM, thanks :)