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(* Auto-generate ARM Neon intrinsics tests.

   Copyright (C) 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.

   Contributed by CodeSourcery.

   This file is part of GCC.

   GCC is free software; you can redistribute it and/or modify it under

   the terms of the GNU General Public License as published by the Free

   Software Foundation; either version 3, or (at your option) any later

   version.

   GCC is distributed in the hope that it will be useful, but WITHOUT ANY

   WARRANTY; without even the implied warranty of MERCHANTABILITY or

   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

   for more details.

   You should have received a copy of the GNU General Public License

   along with GCC; see the file COPYING3.  If not see

   .

   This is an O'Caml program.  The O'Caml compiler is available from:

     http://caml.inria.fr/

   Or from your favourite OS's friendly packaging system. Tested with version

   3.09.2, though other versions will probably work too.

   Compile with:

     ocamlc -c neon.ml

     ocamlc -o neon-testgen neon.cmo neon-testgen.ml

   Run with:

     cd /path/to/gcc/testsuite/gcc.target/arm/neon

     /path/to/neon-testgen

*)

open Neon

type c_type_flags = Pointer | Const

(* Open a test source file.  *)

let open_test_file dir name =

  try

    open_out (dir ^ "/" ^ name ^ ".c")

  with Sys_error str ->

    failwith ("Could not create test source file " ^ name ^ ": " ^ str)

(* Emit prologue code to a test source file.  *)

let emit_prologue chan test_name =

  Printf.fprintf chan "/* Test the `%s' ARM Neon intrinsic.  */\n" test_name;

  Printf.fprintf chan "/* This file was autogenerated by neon-testgen.  */\n\n";

  Printf.fprintf chan "/* { dg-do assemble } */\n";

  Printf.fprintf chan "/* { dg-require-effective-target arm_neon_ok } */\n";

  Printf.fprintf chan

                 "/* { dg-options \"-save-temps -O0 -mfpu=neon -mfloat-abi=softfp\" } */\n";

  Printf.fprintf chan "\n#include \"arm_neon.h\"\n\n";

  Printf.fprintf chan "void test_%s (void)\n{\n" test_name

(* Emit declarations of local variables that are going to be passed

   to an intrinsic, together with one to take a returned value if needed.  *)

let emit_automatics chan c_types features =

  let emit () =

    ignore (

      List.fold_left (fun arg_number -> fun (flags, ty) ->

                        let pointer_bit =

                          if List.mem Pointer flags then "*" else ""

                        in

                          (* Const arguments to builtins are directly

                             written in as constants.  *)

                          if not (List.mem Const flags) then

                            Printf.fprintf chan "  %s %sarg%d_%s;\n"

                                           ty pointer_bit arg_number ty;

                        arg_number + 1)

  in

    match c_types with

      (_, return_ty) :: tys ->

        if return_ty <> "void" then begin

          (* The intrinsic returns a value.  We need to do explict register

             allocation for vget_low tests or they fail because of copy

             elimination.  *)

          ((if List.mem Fixed_return_reg features then

              Printf.fprintf chan "  register %s out_%s asm (\"d18\");\n"

                             return_ty return_ty

            else

              Printf.fprintf chan "  %s out_%s;\n" return_ty return_ty);

           emit ())

        end else

          (* The intrinsic does not return a value.  *)

          emit ()

    | _ -> assert false

(* Emit code to call an intrinsic.  *)

let emit_call chan const_valuator c_types name elt_ty =

  (if snd (List.hd c_types) <> "void" then

     Printf.fprintf chan "  out_%s = " (snd (List.hd c_types))

   else

     Printf.fprintf chan "  ");

  Printf.fprintf chan "%s_%s (" (intrinsic_name name) (string_of_elt elt_ty);

  let print_arg chan arg_number (flags, ty) =

    (* If the argument is of const type, then directly write in the

       constant now.  *)

    if List.mem Const flags then

      match const_valuator with

        None ->

          if List.mem Pointer flags then

            Printf.fprintf chan "0"

          else

            Printf.fprintf chan "1"

      | Some f -> Printf.fprintf chan "%s" (string_of_int (f arg_number))

    else

      Printf.fprintf chan "arg%d_%s" arg_number ty

  in

  let rec print_args arg_number tys =

    match tys with

      [] -> ()

    | [ty] -> print_arg chan arg_number ty

    | ty::tys ->

      print_arg chan arg_number ty;

      Printf.fprintf chan ", ";

      print_args (arg_number + 1) tys

  in

    print_args 0 (List.tl c_types);

    Printf.fprintf chan ");\n"

(* Emit epilogue code to a test source file.  *)

let emit_epilogue chan features regexps =

  let no_op = List.exists (fun feature -> feature = No_op) features in

    Printf.fprintf chan "}\n\n";

    (if not no_op then

       List.iter (fun regexp ->

                   Printf.fprintf chan

                     "/* { dg-final { scan-assembler \"%s\" } } */\n" regexp)

                regexps

     else

       ()

    );

    Printf.fprintf chan "/* { dg-final { cleanup-saved-temps } } */\n"

(* Check a list of C types to determine which ones are pointers and which

   ones are const.  *)

let check_types tys =

  let tys' =

    List.map (fun ty ->

                let len = String.length ty in

                  if len > 2 && String.get ty (len - 2) = ' '

                             && String.get ty (len - 1) = '*'

                  then ([Pointer], String.sub ty 0 (len - 2))

                  else ([], ty)) tys

  in

    List.map (fun (flags, ty) ->

                if String.length ty > 6 && String.sub ty 0 6 = "const "

                then (Const :: flags, String.sub ty 6 ((String.length ty) - 6))

                else (flags, ty)) tys'

(* Given an intrinsic shape, produce a regexp that will match

   the right-hand sides of instructions generated by an intrinsic of

   that shape.  *)

let rec analyze_shape shape =

  let rec n_things n thing =

    match n with

    | n -> thing :: (n_things (n - 1) thing)

  in

  let rec analyze_shape_elt elt =

    match elt with

      Dreg -> "\\[dD\\]\\[0-9\\]+"

    | Qreg -> "\\[qQ\\]\\[0-9\\]+"

    | Corereg -> "\\[rR\\]\\[0-9\\]+"

    | Immed -> "#\\[0-9\\]+"

    | VecArray (1, elt) ->

        let elt_regexp = analyze_shape_elt elt in

          "((\\\\\\{" ^ elt_regexp ^ "\\\\\\})|(" ^ elt_regexp ^ "))"

    | VecArray (n, elt) ->

      let elt_regexp = analyze_shape_elt elt in

      let alt1 = elt_regexp ^ "-" ^ elt_regexp in

      let alt2 = commas (fun x -> x) (n_things n elt_regexp) "" in

        "\\\\\\{((" ^ alt1 ^ ")|(" ^ alt2 ^ "))\\\\\\}"

    | (PtrTo elt | CstPtrTo elt) ->

      "\\\\\\[" ^ (analyze_shape_elt elt) ^ "\\\\\\]"

    | Element_of_dreg -> (analyze_shape_elt Dreg) ^ "\\\\\\[\\[0-9\\]+\\\\\\]"

    | Element_of_qreg -> (analyze_shape_elt Qreg) ^ "\\\\\\[\\[0-9\\]+\\\\\\]"

    | All_elements_of_dreg -> (analyze_shape_elt Dreg) ^ "\\\\\\[\\\\\\]"

    | Alternatives (elts) -> "(" ^ (String.concat "|" (List.map analyze_shape_elt elts)) ^ ")"

  in

    match shape with

      All (n, elt) -> commas analyze_shape_elt (n_things n elt) ""

    | Long -> (analyze_shape_elt Qreg) ^ ", " ^ (analyze_shape_elt Dreg) ^

              ", " ^ (analyze_shape_elt Dreg)

    | Long_noreg elt -> (analyze_shape_elt elt) ^ ", " ^ (analyze_shape_elt elt)

    | Wide -> (analyze_shape_elt Qreg) ^ ", " ^ (analyze_shape_elt Qreg) ^

              ", " ^ (analyze_shape_elt Dreg)

    | Wide_noreg elt -> analyze_shape (Long_noreg elt)

    | Narrow -> (analyze_shape_elt Dreg) ^ ", " ^ (analyze_shape_elt Qreg) ^

                ", " ^ (analyze_shape_elt Qreg)

    | Use_operands elts -> commas analyze_shape_elt (Array.to_list elts) ""

    | By_scalar Dreg ->

        analyze_shape (Use_operands [| Dreg; Dreg; Element_of_dreg |])

    | By_scalar Qreg ->

        analyze_shape (Use_operands [| Qreg; Qreg; Element_of_dreg |])

    | By_scalar _ -> assert false

    | Wide_lane ->

        analyze_shape (Use_operands [| Qreg; Dreg; Element_of_dreg |])

    | Wide_scalar ->

        analyze_shape (Use_operands [| Qreg; Dreg; Element_of_dreg |])

    | Pair_result elt ->

      let elt_regexp = analyze_shape_elt elt in

        elt_regexp ^ ", " ^ elt_regexp

    | Unary_scalar _ -> "FIXME Unary_scalar"

    | Binary_imm elt -> analyze_shape (Use_operands [| elt; elt; Immed |])

    | Narrow_imm -> analyze_shape (Use_operands [| Dreg; Qreg; Immed |])

    | Long_imm -> analyze_shape (Use_operands [| Qreg; Dreg; Immed |])

(* Generate tests for one intrinsic.  *)

let test_intrinsic dir opcode features shape name munge elt_ty =

  (* Open the test source file.  *)

  let test_name = name ^ (string_of_elt elt_ty) in

  let chan = open_test_file dir test_name in

  (* Work out what argument and return types the intrinsic has.  *)

  let c_arity, new_elt_ty = munge shape elt_ty in

  let c_types = check_types (strings_of_arity c_arity) in

  (* Extract any constant valuator (a function specifying what constant

     values are to be written into the intrinsic call) from the features

     list.  *)

  let const_valuator =

    try

      match (List.find (fun feature -> match feature with

                                         Const_valuator _ -> true

                                       | _ -> false) features) with

        Const_valuator f -> Some f

      | _ -> assert false

    with Not_found -> None

  in

  (* Work out what instruction name(s) to expect.  *)

  let insns = get_insn_names features name in

  let no_suffix = (new_elt_ty = NoElts) in

  let insns =

    if no_suffix then insns

                 else List.map (fun insn ->

                                  let suffix = string_of_elt_dots new_elt_ty in

                                    insn ^ "\\." ^ suffix) insns

  in

  (* Construct a regexp to match against the expected instruction name(s).  *)

  let insn_regexp =

    match insns with

      [] -> assert false

    | [insn] -> insn

    | _ ->

      let rec calc_regexp insns cur_regexp =

        match insns with

          [] -> cur_regexp

        | [insn] -> cur_regexp ^ "(" ^ insn ^ "))"

        | insn::insns -> calc_regexp insns (cur_regexp ^ "(" ^ insn ^ ")|")

      in calc_regexp insns "("

  in

  (* Construct regexps to match against the instructions that this

     intrinsic expands to.  Watch out for any writeback character and

     comments after the instruction.  *)

  let regexps = List.map (fun regexp -> insn_regexp ^ "\\[ \t\\]+" ^ regexp ^

                          "!?\\(\\[ \t\\]+@\\[a-zA-Z0-9 \\]+\\)?\\n")

                         (analyze_all_shapes features shape analyze_shape)

  in

    (* Emit file and function prologues.  *)

    emit_prologue chan test_name;

    (* Emit local variable declarations.  *)

    emit_automatics chan c_types features;

    Printf.fprintf chan "\n";

    (* Emit the call to the intrinsic.  *)

    emit_call chan const_valuator c_types name elt_ty;

    (* Emit the function epilogue and the DejaGNU scan-assembler directives.  *)

    emit_epilogue chan features regexps;

    (* Close the test file.  *)

    close_out chan

(* Generate tests for one element of the "ops" table.  *)

let test_intrinsic_group dir (opcode, features, shape, name, munge, types) =

  List.iter (test_intrinsic dir opcode features shape name munge) types

(* Program entry point.  *)

let _ =

  let directory = if Array.length Sys.argv <> 1 then Sys.argv.(1) else "." in

    List.iter (test_intrinsic_group directory) (reinterp @ ops)