2 * Copyright (c) 2003 by Hewlett-Packard Company. All rights reserved.
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * These are common definitions for architectures that provide processor
25 * ordered memory operations except that a later read may pass an
26 * earlier write. Real x86 implementations seem to be in this category,
27 * except apparently for some IDT WinChips, which we ignore.
30 #include "read_ordered.h"
35 AO_compiler_barrier();
36 /* sfence according to Intel docs. Pentium 3 and up. */
37 /* Unnecessary for cached accesses? */
39 #define AO_HAVE_nop_write
41 #if defined(AO_HAVE_store)
43 AO_store_write(volatile AO_t *addr, AO_t val)
45 AO_compiler_barrier();
48 # define AO_HAVE_store_write
50 # define AO_store_release(addr, val) AO_store_write(addr, val)
51 # define AO_HAVE_store_release
52 #endif /* AO_HAVE_store */
54 #if defined(AO_HAVE_char_store)
56 AO_char_store_write(volatile unsigned char *addr, unsigned char val)
58 AO_compiler_barrier();
59 AO_char_store(addr, val);
61 # define AO_HAVE_char_store_write
63 # define AO_char_store_release(addr, val) AO_char_store_write(addr, val)
64 # define AO_HAVE_char_store_release
65 #endif /* AO_HAVE_char_store */
67 #if defined(AO_HAVE_short_store)
69 AO_short_store_write(volatile unsigned short *addr, unsigned short val)
71 AO_compiler_barrier();
72 AO_short_store(addr, val);
74 # define AO_HAVE_short_store_write
76 # define AO_short_store_release(addr, val) AO_short_store_write(addr, val)
77 # define AO_HAVE_short_store_release
78 #endif /* AO_HAVE_short_store */
80 #if defined(AO_HAVE_int_store)
82 AO_int_store_write(volatile unsigned int *addr, unsigned int val)
84 AO_compiler_barrier();
85 AO_int_store(addr, val);
87 # define AO_HAVE_int_store_write
89 # define AO_int_store_release(addr, val) AO_int_store_write(addr, val)
90 # define AO_HAVE_int_store_release
91 #endif /* AO_HAVE_int_store */