2 * Copyright (C) 2009 Bradley Smith <brad@brad-smith.co.uk>
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
12 * The above copyright notice and this permission notice shall be included
13 * in all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 #include "../all_atomic_load_store.h"
27 #include "../ordered.h" /* There are no multiprocessor implementations. */
29 #include "../test_and_set_t_is_ao_t.h"
32 AO_test_and_set_full(volatile AO_TS_t *addr)
37 "xchg %[oldval], %[mem], %[newval]"
39 : [mem] "r"(addr), [newval] "r"(1)
42 return (AO_TS_VAL_t)ret;
44 #define AO_HAVE_test_and_set_full
47 AO_compare_and_swap_full(volatile AO_t *addr, AO_t old, AO_t new_val)
53 " ld.w %[res], %[mem]\n"
54 " eor %[res], %[oldval]\n"
56 " stcond %[mem], %[newval]\n"
59 : [res] "=&r"(ret), [mem] "=m"(*addr)
60 : "m"(*addr), [newval] "r"(new_val), [oldval] "r"(old)
65 #define AO_HAVE_compare_and_swap_full