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;; Machine Descriptions for R8C/M16C/M32C

;; Copyright (C) 2005, 2007 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

;; .

;; Prologue and epilogue patterns

(define_expand "prologue"

  [(const_int 1)]

  ""

  "m32c_emit_prologue(); DONE;"

  )

; For the next two, operands[0] is the amount of stack space we want

; to reserve.

; We assume dwarf2out will process each set in sequence.

(define_insn "prologue_enter_16"

  [(set (mem:HI (pre_dec:HI (reg:HI SP_REGNO)))

        (reg:HI FB_REGNO))

   (set (reg:HI FB_REGNO)

        (reg:HI SP_REGNO))

   (set (reg:HI SP_REGNO)

        (minus:HI (reg:HI SP_REGNO)

                   (match_operand 0 "const_int_operand" "i")))

   ]

  "TARGET_A16"

  "enter\t%0"

  [(set_attr "flags" "x")]

  )

(define_insn "prologue_enter_24"

  [(set (mem:SI (pre_dec:PSI (reg:PSI SP_REGNO)))

        (reg:SI FB_REGNO))

   (set (reg:PSI FB_REGNO)

        (reg:PSI SP_REGNO))

   (set (reg:PSI SP_REGNO)

        (minus:PSI (reg:PSI SP_REGNO)

                   (match_operand 0 "const_int_operand" "i")))

   ]

  "TARGET_A24"

  "enter\t%0"

  [(set_attr "flags" "x")]

  )

; Just a comment, for debugging the assembler output.

(define_insn "prologue_end"

  [(unspec_volatile [(const_int 0)] UNS_PROLOGUE_END)]

  ""

  "; end of prologue"

  [(set_attr "flags" "n")]

  )

(define_expand "epilogue"

  [(const_int 1)]

  ""

  "m32c_emit_epilogue(); DONE;"

  )

(define_expand "eh_return"

  [(match_operand:PSI 0 "" "")]

  ""

  "m32c_emit_eh_epilogue(operands[0]); DONE;"

  )

(define_insn "eh_epilogue"

  [(set (pc)

        (unspec_volatile [(match_operand 0 "m32c_r1_operand" "")

                          (match_operand 1 "m32c_r0_operand" "")

                          ] UNS_EH_EPILOGUE))]

  ""

  "jmp.a\t__m32c_eh_return"

  [(set_attr "flags" "x")]

  )

(define_insn "epilogue_exitd"

  [(set (reg:PSI SP_REGNO)

        (reg:PSI FB_REGNO))

   (set (reg:PSI FB_REGNO)

        (mem:PSI (reg:PSI SP_REGNO)))

   (set (reg:PSI SP_REGNO)

        (plus:PSI (reg:PSI SP_REGNO)

              (match_operand 0 "const_int_operand" "i")))

   (return)

   ]

  ""

  "exitd"

  [(set_attr "flags" "x")]

  )

(define_insn "epilogue_reit"

  [(set (reg:PSI SP_REGNO)

        (plus:PSI (reg:PSI SP_REGNO)

              (match_operand 0 "const_int_operand" "i")))

   (return)

   ]

  ""

  "reit"

  [(set_attr "flags" "x")]

  )

(define_insn "epilogue_rts"

  [(return)

   ]

  ""

  "rts"

  [(set_attr "flags" "x")]

  )

(define_insn "epilogue_start"

  [(unspec_volatile [(const_int 0)] UNS_EPILOGUE_START)]

  ""

  "; start of epilogue"

  [(set_attr "flags" "n")]

  )

; These are used by the prologue/epilogue code.

(define_insn "pushm"

  [(unspec [(match_operand 0 "const_int_operand" "i")] UNS_PUSHM)]

  ""

  "pushm\t%p0"

  [(set_attr "flags" "n")]

  )

(define_insn "popm"

  [(unspec [(match_operand 0 "const_int_operand" "i")] UNS_POPM)]

  ""

  "popm\t%p0"

  [(set_attr "flags" "n")]

  )