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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-ia64/intrinsics.h
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/asm-ia64/intrinsics.h')
-rw-r--r--include/asm-ia64/intrinsics.h181
1 files changed, 181 insertions, 0 deletions
diff --git a/include/asm-ia64/intrinsics.h b/include/asm-ia64/intrinsics.h
new file mode 100644
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+++ b/include/asm-ia64/intrinsics.h
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1#ifndef _ASM_IA64_INTRINSICS_H
2#define _ASM_IA64_INTRINSICS_H
3
4/*
5 * Compiler-dependent intrinsics.
6 *
7 * Copyright (C) 2002-2003 Hewlett-Packard Co
8 * David Mosberger-Tang <davidm@hpl.hp.com>
9 */
10
11#ifndef __ASSEMBLY__
12#include <linux/config.h>
13
14/* include compiler specific intrinsics */
15#include <asm/ia64regs.h>
16#ifdef __INTEL_COMPILER
17# include <asm/intel_intrin.h>
18#else
19# include <asm/gcc_intrin.h>
20#endif
21
22/*
23 * Force an unresolved reference if someone tries to use
24 * ia64_fetch_and_add() with a bad value.
25 */
26extern unsigned long __bad_size_for_ia64_fetch_and_add (void);
27extern unsigned long __bad_increment_for_ia64_fetch_and_add (void);
28
29#define IA64_FETCHADD(tmp,v,n,sz,sem) \
30({ \
31 switch (sz) { \
32 case 4: \
33 tmp = ia64_fetchadd4_##sem((unsigned int *) v, n); \
34 break; \
35 \
36 case 8: \
37 tmp = ia64_fetchadd8_##sem((unsigned long *) v, n); \
38 break; \
39 \
40 default: \
41 __bad_size_for_ia64_fetch_and_add(); \
42 } \
43})
44
45#define ia64_fetchadd(i,v,sem) \
46({ \
47 __u64 _tmp; \
48 volatile __typeof__(*(v)) *_v = (v); \
49 /* Can't use a switch () here: gcc isn't always smart enough for that... */ \
50 if ((i) == -16) \
51 IA64_FETCHADD(_tmp, _v, -16, sizeof(*(v)), sem); \
52 else if ((i) == -8) \
53 IA64_FETCHADD(_tmp, _v, -8, sizeof(*(v)), sem); \
54 else if ((i) == -4) \
55 IA64_FETCHADD(_tmp, _v, -4, sizeof(*(v)), sem); \
56 else if ((i) == -1) \
57 IA64_FETCHADD(_tmp, _v, -1, sizeof(*(v)), sem); \
58 else if ((i) == 1) \
59 IA64_FETCHADD(_tmp, _v, 1, sizeof(*(v)), sem); \
60 else if ((i) == 4) \
61 IA64_FETCHADD(_tmp, _v, 4, sizeof(*(v)), sem); \
62 else if ((i) == 8) \
63 IA64_FETCHADD(_tmp, _v, 8, sizeof(*(v)), sem); \
64 else if ((i) == 16) \
65 IA64_FETCHADD(_tmp, _v, 16, sizeof(*(v)), sem); \
66 else \
67 _tmp = __bad_increment_for_ia64_fetch_and_add(); \
68 (__typeof__(*(v))) (_tmp); /* return old value */ \
69})
70
71#define ia64_fetch_and_add(i,v) (ia64_fetchadd(i, v, rel) + (i)) /* return new value */
72
73/*
74 * This function doesn't exist, so you'll get a linker error if
75 * something tries to do an invalid xchg().
76 */
77extern void ia64_xchg_called_with_bad_pointer (void);
78
79#define __xchg(x,ptr,size) \
80({ \
81 unsigned long __xchg_result; \
82 \
83 switch (size) { \
84 case 1: \
85 __xchg_result = ia64_xchg1((__u8 *)ptr, x); \
86 break; \
87 \
88 case 2: \
89 __xchg_result = ia64_xchg2((__u16 *)ptr, x); \
90 break; \
91 \
92 case 4: \
93 __xchg_result = ia64_xchg4((__u32 *)ptr, x); \
94 break; \
95 \
96 case 8: \
97 __xchg_result = ia64_xchg8((__u64 *)ptr, x); \
98 break; \
99 default: \
100 ia64_xchg_called_with_bad_pointer(); \
101 } \
102 __xchg_result; \
103})
104
105#define xchg(ptr,x) \
106 ((__typeof__(*(ptr))) __xchg ((unsigned long) (x), (ptr), sizeof(*(ptr))))
107
108/*
109 * Atomic compare and exchange. Compare OLD with MEM, if identical,
110 * store NEW in MEM. Return the initial value in MEM. Success is
111 * indicated by comparing RETURN with OLD.
112 */
113
114#define __HAVE_ARCH_CMPXCHG 1
115
116/*
117 * This function doesn't exist, so you'll get a linker error
118 * if something tries to do an invalid cmpxchg().
119 */
120extern long ia64_cmpxchg_called_with_bad_pointer (void);
121
122#define ia64_cmpxchg(sem,ptr,old,new,size) \
123({ \
124 __u64 _o_, _r_; \
125 \
126 switch (size) { \
127 case 1: _o_ = (__u8 ) (long) (old); break; \
128 case 2: _o_ = (__u16) (long) (old); break; \
129 case 4: _o_ = (__u32) (long) (old); break; \
130 case 8: _o_ = (__u64) (long) (old); break; \
131 default: break; \
132 } \
133 switch (size) { \
134 case 1: \
135 _r_ = ia64_cmpxchg1_##sem((__u8 *) ptr, new, _o_); \
136 break; \
137 \
138 case 2: \
139 _r_ = ia64_cmpxchg2_##sem((__u16 *) ptr, new, _o_); \
140 break; \
141 \
142 case 4: \
143 _r_ = ia64_cmpxchg4_##sem((__u32 *) ptr, new, _o_); \
144 break; \
145 \
146 case 8: \
147 _r_ = ia64_cmpxchg8_##sem((__u64 *) ptr, new, _o_); \
148 break; \
149 \
150 default: \
151 _r_ = ia64_cmpxchg_called_with_bad_pointer(); \
152 break; \
153 } \
154 (__typeof__(old)) _r_; \
155})
156
157#define cmpxchg_acq(ptr,o,n) ia64_cmpxchg(acq, (ptr), (o), (n), sizeof(*(ptr)))
158#define cmpxchg_rel(ptr,o,n) ia64_cmpxchg(rel, (ptr), (o), (n), sizeof(*(ptr)))
159
160/* for compatibility with other platforms: */
161#define cmpxchg(ptr,o,n) cmpxchg_acq(ptr,o,n)
162
163#ifdef CONFIG_IA64_DEBUG_CMPXCHG
164# define CMPXCHG_BUGCHECK_DECL int _cmpxchg_bugcheck_count = 128;
165# define CMPXCHG_BUGCHECK(v) \
166 do { \
167 if (_cmpxchg_bugcheck_count-- <= 0) { \
168 void *ip; \
169 extern int printk(const char *fmt, ...); \
170 ip = (void *) ia64_getreg(_IA64_REG_IP); \
171 printk("CMPXCHG_BUGCHECK: stuck at %p on word %p\n", ip, (v)); \
172 break; \
173 } \
174 } while (0)
175#else /* !CONFIG_IA64_DEBUG_CMPXCHG */
176# define CMPXCHG_BUGCHECK_DECL
177# define CMPXCHG_BUGCHECK(v)
178#endif /* !CONFIG_IA64_DEBUG_CMPXCHG */
179
180#endif
181#endif /* _ASM_IA64_INTRINSICS_H */
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