54 lines
1.4 KiB
OCaml
54 lines
1.4 KiB
OCaml
(* Specific operations for the Alpha processor *)
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open Format
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(* Addressing modes *)
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type addressing_mode =
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Ibased of string * int (* symbol + displ *)
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| Iindexed of int (* reg + displ *)
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(* Specific operations *)
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type specific_operation =
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Iadd4 | Iadd8 | Isub4 | Isub8 (* Scaled adds and subs *)
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(* Sizes, endianness *)
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let big_endian = false
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let size_addr = 8
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let size_int = 8
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let size_float = 8
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(* Operations on addressing modes *)
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let identity_addressing = Iindexed 0
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let offset_addressing addr delta =
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match addr with
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Ibased(s, n) -> Ibased(s, n + delta)
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| Iindexed n -> Iindexed(n + delta)
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let num_args_addressing = function
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Ibased(s, n) -> 0
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| Iindexed n -> 1
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(* Printing operations and addressing modes *)
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let print_addressing printreg addr arg =
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match addr with
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Ibased(s, n) ->
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print_string "\""; print_string s; print_string "\"";
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if n <> 0 then begin print_string " + "; print_int n end
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| Iindexed n ->
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printreg arg.(0);
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if n <> 0 then begin print_string " + "; print_int n end
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let print_specific_operation printreg op arg =
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match op with
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Iadd4 -> printreg arg.(0); print_string " * 4 + "; printreg arg.(1)
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| Iadd8 -> printreg arg.(0); print_string " * 8 + "; printreg arg.(1)
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| Isub4 -> printreg arg.(0); print_string " * 4 - "; printreg arg.(1)
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| Isub8 -> printreg arg.(0); print_string " * 8 - "; printreg arg.(1)
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