gcc/config/nios2/sync.md

   1 ;; Machine Description for Altera Nios II synchronization primitives.
   2 ;; Copyright (C) 2014-2018 Free Software Foundation, Inc.
   3 ;; Contributed by Mentor Graphics, Inc.
   4 ;;
   5 ;; This file is part of GCC.
   6 ;;
   7 ;; GCC is free software; you can redistribute it and/or modify
   8 ;; it under the terms of the GNU General Public License as published by
   9 ;; the Free Software Foundation; either version 3, or (at your option)
  10 ;; any later version.
  11 ;;
  12 ;; GCC is distributed in the hope that it will be useful,
  13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 ;; GNU General Public License for more details.
  16 ;;
  17 ;; You should have received a copy of the GNU General Public License
  18 ;; along with GCC; see the file COPYING3.  If not see
  19 ;; <http://www.gnu.org/licenses/>.
  20
  21 (define_int_iterator UNSPECV_LOAD_EXCLUSIVE [UNSPECV_LDEX UNSPECV_LDSEX])
  22 (define_int_attr load_exclusive [(UNSPECV_LDEX  "ldex")
  23                                  (UNSPECV_LDSEX "ldsex")])
  24 (define_insn "<load_exclusive>"
  25   [(set (match_operand:SI 0 "register_operand" "=r")
  26         (unspec_volatile:SI
  27           [(match_operand:SI 1 "ldstex_memory_operand" "v")]
  28           UNSPECV_LOAD_EXCLUSIVE))]
  29   "TARGET_ARCH_R2"
  30   "<load_exclusive>\\t%0, %A1"
  31   [(set_attr "type" "ld")])
  32
  33 (define_int_iterator UNSPECV_STORE_EXCLUSIVE [UNSPECV_STEX UNSPECV_STSEX])
  34 (define_int_attr store_exclusive [(UNSPECV_STEX  "stex")
  35                                   (UNSPECV_STSEX "stsex")])
  36 (define_insn "<store_exclusive>"
  37   [(set (match_operand:SI 2 "register_operand" "=r")
  38         (unspec_volatile:SI [(const_int 0)] UNSPECV_STORE_EXCLUSIVE))
  39    (set (match_operand:SI 0 "ldstex_memory_operand" "=v")
  40         (unspec_volatile:SI
  41           [(match_operand:SI 1 "reg_or_0_operand" "rM")]
  42           UNSPECV_STORE_EXCLUSIVE))]
  43   "TARGET_ARCH_R2"
  44   "<store_exclusive>\\t%2, %z1, %A0"
  45   [(set_attr "type" "st")])