Merge remote-tracking branch 'remotes/cody/tags/block-pull-request' into staging
[qemu.git] / tcg / tcg-mo.h
1 /*
2 * Tiny Code Generator for QEMU
3 *
4 * Copyright (c) 2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25 #ifndef TCG_MO_H
26 #define TCG_MO_H
27
28 typedef enum {
29 /* Used to indicate the type of accesses on which ordering
30 is to be ensured. Modeled after SPARC barriers.
31
32 This is of the form TCG_MO_A_B where A is before B in program order.
33 */
34 TCG_MO_LD_LD = 0x01,
35 TCG_MO_ST_LD = 0x02,
36 TCG_MO_LD_ST = 0x04,
37 TCG_MO_ST_ST = 0x08,
38 TCG_MO_ALL = 0x0F, /* OR of the above */
39
40 /* Used to indicate the kind of ordering which is to be ensured by the
41 instruction. These types are derived from x86/aarch64 instructions.
42 It should be noted that these are different from C11 semantics. */
43 TCG_BAR_LDAQ = 0x10, /* Following ops will not come forward */
44 TCG_BAR_STRL = 0x20, /* Previous ops will not be delayed */
45 TCG_BAR_SC = 0x30, /* No ops cross barrier; OR of the above */
46 } TCGBar;
47
48 #endif /* TCG_MO_H */