1 ;; Machine description for RISC-V atomic operations.
2 ;; Copyright (C) 2011-2024 Free Software Foundation, Inc.
3 ;; Contributed by Andrew Waterman (andrew@sifive.com).
4 ;; Based on MIPS target for GNU compiler.
6 ;; This file is part of GCC.
8 ;; GCC is free software; you can redistribute it and/or modify
9 ;; it under the terms of the GNU General Public License as published by
10 ;; the Free Software Foundation; either version 3, or (at your option)
13 ;; GCC is distributed in the hope that it will be useful,
14 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 ;; GNU General Public License for more details.
18 ;; You should have received a copy of the GNU General Public License
19 ;; along with GCC; see the file COPYING3. If not see
20 ;; <http://www.gnu.org/licenses/>.
24 (define_insn "mem_thread_fence_ztso"
25 [(set (match_operand:BLK 0 "" "")
26 (unspec:BLK [(match_dup 0)] UNSPEC_MEMORY_BARRIER))
27 (match_operand:SI 1 "const_int_operand" "")] ;; model
30 enum memmodel model = (enum memmodel) INTVAL (operands[1]);
31 model = memmodel_base (model);
33 if (model == MEMMODEL_SEQ_CST)
34 return "fence\trw,rw";
38 [(set_attr "type" "atomic")
39 (set (attr "length") (const_int 4))])
41 ;; Atomic memory operations.
43 (define_insn "atomic_load_ztso<mode>"
44 [(set (match_operand:ANYI 0 "register_operand" "=r")
46 [(match_operand:ANYI 1 "memory_operand" "A")
47 (match_operand:SI 2 "const_int_operand")] ;; model
51 enum memmodel model = (enum memmodel) INTVAL (operands[2]);
52 model = memmodel_base (model);
54 if (model == MEMMODEL_SEQ_CST)
55 return "fence\trw,rw\;"
58 return "<load>\t%0,%1";
60 [(set_attr "type" "multi")
62 (symbol_ref "(is_mm_seq_cst (memmodel_from_int (INTVAL (operands[2]))) ? 8
66 (define_insn "atomic_store_ztso<mode>"
67 [(set (match_operand:ANYI 0 "memory_operand" "=A")
69 [(match_operand:ANYI 1 "reg_or_0_operand" "rJ")
70 (match_operand:SI 2 "const_int_operand")] ;; model
71 UNSPEC_ATOMIC_STORE))]
74 enum memmodel model = (enum memmodel) INTVAL (operands[2]);
75 model = memmodel_base (model);
77 if (model == MEMMODEL_SEQ_CST)
78 return "<store>\t%z1,%0\;"
81 return "<store>\t%z1,%0";
83 [(set_attr "type" "multi")
85 (symbol_ref "(is_mm_seq_cst (memmodel_from_int (INTVAL (operands[2]))) ? 8