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;; GCC machine description for IA-64 synchronization instructions.

;; Copyright (C) 2005, 2007, 2008, 2009, 2010

;; Free Software Foundation, Inc.

;;

;; 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

;; .

(define_mode_iterator IMODE [QI HI SI DI])

(define_mode_iterator I124MODE [QI HI SI])

(define_mode_iterator I48MODE [SI DI])

(define_mode_attr modesuffix [(QI "1") (HI "2") (SI "4") (DI "8")])

(define_code_iterator FETCHOP [plus minus ior xor and])

(define_code_attr fetchop_name

  [(plus "add") (minus "sub") (ior "ior") (xor "xor") (and "and")])

(define_expand "memory_barrier"

  [(set (match_dup 0)

        (unspec:BLK [(match_dup 0)] UNSPEC_MF))]

  ""

{

  operands[0] = gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (Pmode));

  MEM_VOLATILE_P (operands[0]) = 1;

})

(define_insn "*memory_barrier"

  [(set (match_operand:BLK 0 "" "")

        (unspec:BLK [(match_dup 0)] UNSPEC_MF))]

  ""

  "mf"

  [(set_attr "itanium_class" "syst_m")])

(define_insn "fetchadd_acq_"

  [(set (match_operand:I48MODE 0 "gr_register_operand" "=r")

        (match_operand:I48MODE 1 "not_postinc_memory_operand" "+S"))

   (set (match_dup 1)

        (unspec:I48MODE [(match_dup 1)

                         (match_operand:I48MODE 2 "fetchadd_operand" "n")]

                        UNSPEC_FETCHADD_ACQ))]

  ""

  "fetchadd.acq %0 = %1, %2"

  [(set_attr "itanium_class" "sem")])

(define_expand "sync_"

  [(set (match_operand:IMODE 0 "memory_operand" "")

        (FETCHOP:IMODE (match_dup 0)

          (match_operand:IMODE 1 "general_operand" "")))]

  ""

{

  ia64_expand_atomic_op (, operands[0], operands[1], NULL, NULL);

  DONE;

})

(define_expand "sync_nand"

  [(set (match_operand:IMODE 0 "memory_operand" "")

        (not:IMODE

          (and:IMODE (match_dup 0)

                     (match_operand:IMODE 1 "general_operand" ""))))]

  ""

{

  ia64_expand_atomic_op (NOT, operands[0], operands[1], NULL, NULL);

  DONE;

})

(define_expand "sync_old_"

  [(set (match_operand:IMODE 0 "gr_register_operand" "")

        (FETCHOP:IMODE

          (match_operand:IMODE 1 "memory_operand" "")

          (match_operand:IMODE 2 "general_operand" "")))]

  ""

{

  ia64_expand_atomic_op (, operands[1], operands[2], operands[0], NULL);

  DONE;

})

(define_expand "sync_old_nand"

  [(set (match_operand:IMODE 0 "gr_register_operand" "")

        (not:IMODE

          (and:IMODE (match_operand:IMODE 1 "memory_operand" "")

                     (match_operand:IMODE 2 "general_operand" ""))))]

  ""

{

  ia64_expand_atomic_op (NOT, operands[1], operands[2], operands[0], NULL);

  DONE;

})

(define_expand "sync_new_"

  [(set (match_operand:IMODE 0 "gr_register_operand" "")

        (FETCHOP:IMODE

          (match_operand:IMODE 1 "memory_operand" "")

          (match_operand:IMODE 2 "general_operand" "")))]

  ""

{

  ia64_expand_atomic_op (, operands[1], operands[2], NULL, operands[0]);

  DONE;

})

(define_expand "sync_new_nand"

  [(set (match_operand:IMODE 0 "gr_register_operand" "")

        (not:IMODE

          (and:IMODE (match_operand:IMODE 1 "memory_operand" "")

                     (match_operand:IMODE 2 "general_operand" ""))))]

  ""

{

  ia64_expand_atomic_op (NOT, operands[1], operands[2], NULL, operands[0]);

  DONE;

})

(define_expand "sync_compare_and_swap"

  [(match_operand:IMODE 0 "gr_register_operand" "")

   (match_operand:IMODE 1 "memory_operand" "")

   (match_operand:IMODE 2 "gr_register_operand" "")

   (match_operand:IMODE 3 "gr_register_operand" "")]

  ""

{

  rtx ccv = gen_rtx_REG (DImode, AR_CCV_REGNUM);

  rtx dst;

  convert_move (ccv, operands[2], 1);

  dst = operands[0];

  if (GET_MODE (dst) != DImode)

    dst = gen_reg_rtx (DImode);

  emit_insn (gen_cmpxchg_rel_ (dst, operands[1], ccv, operands[3]));

  emit_insn (gen_memory_barrier ());

  if (dst != operands[0])

    emit_move_insn (operands[0], gen_lowpart (mode, dst));

  DONE;

})

(define_insn "cmpxchg_rel_"

  [(set (match_operand:DI 0 "gr_register_operand" "=r")

        (zero_extend:DI

          (match_operand:I124MODE 1 "not_postinc_memory_operand" "+S")))

   (set (match_dup 1)

        (unspec:I124MODE

          [(match_dup 1)

           (match_operand:DI 2 "ar_ccv_reg_operand" "")

           (match_operand:I124MODE 3 "gr_reg_or_0_operand" "rO")]

          UNSPEC_CMPXCHG_ACQ))]

  ""

  "cmpxchg.rel %0 = %1, %r3, %2"

  [(set_attr "itanium_class" "sem")])

(define_insn "cmpxchg_rel_di"

  [(set (match_operand:DI 0 "gr_register_operand" "=r")

        (match_operand:DI 1 "not_postinc_memory_operand" "+S"))

   (set (match_dup 1)

        (unspec:DI [(match_dup 1)

                    (match_operand:DI 2 "ar_ccv_reg_operand" "")

                    (match_operand:DI 3 "gr_reg_or_0_operand" "rO")]

                   UNSPEC_CMPXCHG_ACQ))]

  ""

  "cmpxchg8.rel %0 = %1, %r3, %2"

  [(set_attr "itanium_class" "sem")])

(define_insn "sync_lock_test_and_set"

  [(set (match_operand:IMODE 0 "gr_register_operand" "=r")

        (match_operand:IMODE 1 "not_postinc_memory_operand" "+S"))

   (set (match_dup 1)

        (match_operand:IMODE 2 "gr_reg_or_0_operand" "rO"))]

  ""

  "xchg %0 = %1, %r2"

  [(set_attr "itanium_class" "sem")])

(define_expand "sync_lock_release"

  [(set (match_operand:IMODE 0 "memory_operand" "")

        (match_operand:IMODE 1 "gr_reg_or_0_operand" ""))]

  ""

{

  gcc_assert (MEM_VOLATILE_P (operands[0]));

})