90 lines
3.0 KiB
OCaml
90 lines
3.0 KiB
OCaml
(**************************************************************************)
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(* *)
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(* OCaml *)
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(* *)
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(* Xavier Leroy, projet Gallium, INRIA Rocquencourt *)
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(* Bill O'Farrell, IBM *)
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(* *)
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(* Copyright 2015 Institut National de Recherche en Informatique et *)
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(* en Automatique. *)
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(* Copyright 2015 IBM (Bill O'Farrell with help from Tristan Amini). *)
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(* *)
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(* All rights reserved. This file is distributed under the terms of *)
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(* the GNU Lesser General Public License version 2.1, with the *)
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(* special exception on linking described in the file LICENSE. *)
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(* *)
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(**************************************************************************)
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(* Specific operations for the Z processor *)
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open Format
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(* Machine-specific command-line options *)
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let pic_code = ref true
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let command_line_options =
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[ "-fPIC", Arg.Set pic_code,
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" Generate position-independent machine code (default)";
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"-fno-PIC", Arg.Clear pic_code,
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" Generate position-dependent machine code" ]
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(* Specific operations *)
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type specific_operation =
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Imultaddf (* multiply and add *)
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| Imultsubf (* multiply and subtract *)
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(* Addressing modes *)
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type addressing_mode =
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| Iindexed of int (* reg + displ *)
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| Iindexed2 of int (* reg + reg + displ *)
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(* Sizes, endianness *)
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let big_endian = true
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let size_addr = 8
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let size_int = size_addr
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let size_float = 8
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let allow_unaligned_access = false
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(* Behavior of division *)
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let division_crashes_on_overflow = true
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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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| Iindexed n -> Iindexed(n + delta)
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| Iindexed2 n -> Iindexed2(n + delta)
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let num_args_addressing = function
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| Iindexed _ -> 1
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| Iindexed2 _ -> 2
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(* Printing operations and addressing modes *)
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let print_addressing printreg addr ppf arg =
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match addr with
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| Iindexed n ->
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let idx = if n <> 0 then Printf.sprintf " + %i" n else "" in
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fprintf ppf "%a%s" printreg arg.(0) idx
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| Iindexed2 n ->
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let idx = if n <> 0 then Printf.sprintf " + %i" n else "" in
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fprintf ppf "%a + %a%s" printreg arg.(0) printreg arg.(1) idx
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let print_specific_operation printreg op ppf arg =
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match op with
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| Imultaddf ->
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fprintf ppf "%a *f %a +f %a"
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printreg arg.(0) printreg arg.(1) printreg arg.(2)
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| Imultsubf ->
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fprintf ppf "%a *f %a -f %a"
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printreg arg.(0) printreg arg.(1) printreg arg.(2)
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