2
* Copyright (c) 2003 Hewlett-Packard Development Company, L.P.
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
23
/* The following really assume we have a 486 or better. */
24
/* If ASSUME_WINDOWS98 is defined, we assume Windows 98 or newer. */
25
/* If ASSUME_VISTA is defined, we assume Windows Server 2003, Vista */
28
#include "../all_aligned_atomic_load_store.h"
30
/* Real X86 implementations, except for some old WinChips, appear */
31
/* to enforce ordering between memory operations, EXCEPT that a later */
32
/* read can pass earlier writes, presumably due to the visible */
33
/* presence of store buffers. */
34
/* We ignore both the WinChips, and the fact that the official specs */
35
/* seem to be much weaker (and arguably too weak to be usable). */
37
#include "../ordered_except_wr.h"
39
#include "../test_and_set_t_is_char.h"
42
/* Seems like over-kill, but that's what MSDN recommends. */
43
/* And apparently winbase.h is not always self-contained. */
47
#define _InterlockedIncrement InterlockedIncrement
48
#define _InterlockedDecrement InterlockedDecrement
49
#define _InterlockedExchange InterlockedExchange
50
#define _InterlockedExchangeAdd InterlockedExchangeAdd
51
#define _InterlockedCompareExchange InterlockedCompareExchange
58
#pragma intrinsic (_ReadWriteBarrier)
65
LONG __cdecl _InterlockedIncrement(LONG volatile *Addend);
66
LONG __cdecl _InterlockedDecrement(LONG volatile *Addend);
67
LONG __cdecl _InterlockedExchangeAdd(LONG volatile* Target, LONG Addend);
68
LONG __cdecl _InterlockedExchange(LONG volatile* Target, LONG Value);
69
LONG __cdecl _InterlockedCompareExchange(LONG volatile* Dest,
70
LONG Exchange, LONG Comp);
75
#endif /* _MSC_VER >= 1400 */
77
#pragma intrinsic (_InterlockedIncrement)
78
#pragma intrinsic (_InterlockedDecrement)
79
#pragma intrinsic (_InterlockedExchange)
80
#pragma intrinsic (_InterlockedExchangeAdd)
81
#pragma intrinsic (_InterlockedCompareExchange)
83
#endif /* _MSC_VER < 1310 */
85
/* As far as we can tell, the lfence and sfence instructions are not */
86
/* currently needed or useful for cached memory accesses. */
88
/* Unfortunately mfence doesn't exist everywhere. */
89
/* IsProcessorFeaturePresent(PF_COMPARE_EXCHANGE128) is */
90
/* probably a conservative test for it? */
92
#if defined(AO_USE_PENTIUM4_INSTRS)
100
#define AO_HAVE_nop_full
104
/* We could use the cpuid instruction. But that seems to be slower */
105
/* than the default implementation based on test_and_set_full. Thus */
106
/* we omit that bit of misinformation here. */
111
AO_fetch_and_add_full (volatile AO_t *p, AO_t incr)
113
return _InterlockedExchangeAdd((LONG volatile*)p, (LONG)incr);
116
#define AO_HAVE_fetch_and_add_full
119
AO_fetch_and_add1_full (volatile AO_t *p)
121
return _InterlockedIncrement((LONG volatile *)p) - 1;
124
#define AO_HAVE_fetch_and_add1_full
127
AO_fetch_and_sub1_full (volatile AO_t *p)
129
return _InterlockedDecrement((LONG volatile *)p) + 1;
132
#define AO_HAVE_fetch_and_sub1_full
134
AO_INLINE AO_TS_VAL_t
135
AO_test_and_set_full(volatile AO_TS_t *addr)
141
xchg byte ptr [ebx],al ;
145
#define AO_HAVE_test_and_set_full
147
#ifdef AO_ASSUME_WINDOWS98
148
/* Returns nonzero if the comparison succeeded. */
150
AO_compare_and_swap_full(volatile AO_t *addr,
151
AO_t old, AO_t new_val)
153
return _InterlockedCompareExchange((LONG volatile *)addr,
154
(LONG)new_val, (LONG)old)
158
#define AO_HAVE_compare_and_swap_full
159
#endif /* ASSUME_WINDOWS98 */
162
# error wrong architecture
166
/* NEC LE-IT: whenever we run on a pentium class machine we have that
167
* certain function */
169
#include "../standard_ao_double_t.h"
170
#pragma intrinsic (_InterlockedCompareExchange64)
171
/* Returns nonzero if the comparison succeeded. */
173
AO_compare_double_and_swap_double_full(volatile AO_double_t *addr,
174
AO_t old_val1, AO_t old_val2,
175
AO_t new_val1, AO_t new_val2)
177
__int64 oldv = (__int64)old_val2 | ((__int64)old_val1 << 32);
178
__int64 newv = (__int64)new_val2 | ((__int64)new_val1 << 32);
179
return _InterlockedCompareExchange64((__int64 volatile *)addr,
182
#define AO_HAVE_compare_double_and_swap_double_full
186
AO_compare_double_and_swap_double_full(volatile AO_double_t *addr,
190
return _InterlockedCompareExchange64((__int64 volatile *)addr,
191
new_val.AO_whole, old_val.AO_whole) == old_val.AO_whole;
193
#define AO_HAVE_double_compare_and_swap_full
194
#endif // __cplusplus
195
#endif /* ASSUME_VISTA */
197
#include "../ao_t_is_int.h"
added
removed
libatomic_ops-1.2/src/atomic_ops/sysdeps/msftc/x86.h
