1/* This file is part of GDB, the GNU debugger.
2
3   Copyright 2008-2023 Free Software Foundation, Inc.
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18int main(void)
19{
20  unsigned long tmp, cond;
21  unsigned long dword = 0;
22
23  /* Test that we can step over ldxr/stxr. This sequence should step from
24     ldxr to the following __asm __volatile.  */
25  __asm __volatile ("1:     ldxr    %0,%2\n"                             \
26                    "       cmp     %0,#1\n"                             \
27                    "       b.eq    out\n"                               \
28                    "       add     %0,%0,1\n"                           \
29                    "       stxr    %w1,%0,%2\n"                         \
30                    "       cbnz    %w1,1b"                              \
31                    : "=&r" (tmp), "=&r" (cond), "+Q" (dword)            \
32                    : : "memory");
33
34  /* This sequence should take the conditional branch and step from ldxr
35     to the return dword line.  */
36  __asm __volatile ("1:     ldxr    %0,%2\n"                             \
37                    "       cmp     %0,#1\n"                             \
38                    "       b.eq    out\n"                               \
39                    "       add     %0,%0,1\n"                           \
40                    "       stxr    %w1,%0,%2\n"                         \
41                    "       cbnz    %w1,1b\n"                            \
42                    : "=&r" (tmp), "=&r" (cond), "+Q" (dword)            \
43                    : : "memory");
44
45  dword = -1;
46__asm __volatile ("out:\n");
47  return dword;
48}
49