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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 | */ | |
26 | extern unsigned long __bad_size_for_ia64_fetch_and_add (void); | |
27 | extern 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 | */ | |
77 | extern 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 | */ | |
120 | extern 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 */ |