1;; Machine Description for Altera Nios II synchronization primitives.
2;; Copyright (C) 2014-2021 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")])
46