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;; Machine Descriptions for R8C/M16C/M32C

;; Copyright (C) 2005, 2007, 2008, 2010

;; Free Software Foundation, Inc.

;; Contributed by Red Hat.

;;

;; 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

;; .

;; jump, conditionals, calls, etc

(define_insn "indirect_jump_16"

  [(set (pc)

       (match_operand:HI 0 "register_operand" "Rhi"))]

  "TARGET_A16"

;  "jmpi.a\t%0"

  ; no 16-bit jmpi in r8c

  "push.b #0 | push.w\t%0 | rts"

  [(set_attr "flags" "x")]

  )

(define_insn "indirect_jump_24"

  [(set (pc)

       (match_operand:PSI 0 "register_operand" "Rpi"))]

  "TARGET_A24"

  "jmpi.a\t%0"

  [(set_attr "flags" "n")]

  )

(define_expand "indirect_jump"

  [(match_operand 0 "register_operand" "")]

  ""

  "if (TARGET_A16)

     emit_jump_insn (gen_indirect_jump_16(operands[0]));

   else

     emit_jump_insn (gen_indirect_jump_24(operands[0]));

   DONE;"

  )

; We can replace this with jmp.s when gas supports relaxing.  m32c

; opcodes are too complicated to try to compute their sizes here, it's

; far easier (and more reliable) to let gas worry about it.

(define_insn "jump"

  [(set (pc)

        (label_ref (match_operand 0 "" "")))]

  ""

  "jmp.a\t%l0"

  [(set_attr "flags" "n")]

)

; No 16-bit indirect calls on r8c/m16c.  */

(define_insn "call"

  [(call (match_operand:QI 0 "memory_operand" "Si,SaSb,?Rmm")

         (match_operand 1 "" ""))

   (use (match_operand 2 "immediate_operand" ""))]

  ""

  "*

switch (which_alternative) {

  case 0:

    {

      HOST_WIDE_INT func_vect_num =

      current_function_special_page_vector(XEXP (operands[0], 0));

      if (func_vect_num)

        {

          operands[3] = gen_rtx_CONST_INT (VOIDmode, func_vect_num);

          return \"jsrs\t%3\";

        }

      else

        return \"jsr.a\t%0\";

    }

  case 1: return TARGET_A16 ? \"push.w %a0 | jsr.a\tm32c_jsri16\" : \"jsri.a\t%a0\";

  case 2: return \"jsri.a\t%a0\";

  default: gcc_unreachable ();

}"

  [(set_attr "flags" "x")]

  )

(define_insn "call_value"

  [(set (match_operand 0 "m32c_return_operand" "=RdiRmmRpa,RdiRmmRpa,RdiRmmRpa")

        (call (match_operand:QI 1 "memory_operand" "Si,SaSb,?Rmm")

              (match_operand 2 "" "")))

   (use (match_operand 3 "immediate_operand" ""))]

  ""

  "*

switch (which_alternative) {

  case 0:

    {

      HOST_WIDE_INT func_vect_num =

      current_function_special_page_vector(XEXP (operands[1], 0));

      if (func_vect_num)

        {

          operands[4] = gen_rtx_CONST_INT (VOIDmode, func_vect_num);

          return \"jsrs\t%4\";

        }

      else

        return \"jsr.a\t%1\";

    }

  case 1: return TARGET_A16 ? \"push.w %a1 | jsr.a\tm32c_jsri16\" : \"jsri.a\t%a1\";

  case 2: return \"jsri.a\t%a1\";

  default: gcc_unreachable ();

}"

  [(set_attr "flags" "x,x,x")]

  )

(define_expand "untyped_call"

  [(parallel [(call (match_operand 0 "" "")

                    (const_int 0))

              (match_operand 1 "" "")

              (match_operand 2 "" "")])]

  ""

  "

{

  int i;

  emit_call_insn (gen_call (operands[0], const0_rtx, const0_rtx));

  for (i = 0; i < XVECLEN (operands[2], 0); i++)

    {

      rtx set = XVECEXP (operands[2], 0, i);

      emit_move_insn (SET_DEST (set), SET_SRC (set));

    }

  DONE;

}")