1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/*
* Copyright (c) 2016 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef included_clib_cpu_h
#define included_clib_cpu_h
#include <vppinfra/format.h>
/*
* multiarchitecture support. Adding new entry will produce
* new graph node function variant optimized for specific cpu
* microarchitecture.
* Order is important for runtime selection, as 1st match wins...
*/
#if __x86_64__ && CLIB_DEBUG == 0
#define foreach_march_variant(macro, x) \
macro(avx2, x, "arch=core-avx2")
#else
#define foreach_march_variant(macro, x)
#endif
#if __GNUC__ > 4 && !__clang__
#define CLIB_CPU_OPTIMIZED __attribute__ ((optimize ("tree-vectorize")))
#else
#define CLIB_CPU_OPTIMIZED
#endif
#define CLIB_MULTIARCH_ARCH_CHECK(arch, fn, tgt) \
if (clib_cpu_supports_ ## arch()) \
return & fn ## _ ##arch;
#define CLIB_MULTIARCH_SELECT_FN(fn,...) \
__VA_ARGS__ void * fn ## _multiarch_select(void) \
{ \
foreach_march_variant(CLIB_MULTIARCH_ARCH_CHECK, fn) \
return & fn; \
}
#ifdef CLIB_MULTIARCH_VARIANT
#define __CLIB_MULTIARCH_FN(a,b) a##_##b
#define _CLIB_MULTIARCH_FN(a,b) __CLIB_MULTIARCH_FN(a,b)
#define CLIB_MULTIARCH_FN(fn) _CLIB_MULTIARCH_FN(fn,CLIB_MULTIARCH_VARIANT)
#else
#define CLIB_MULTIARCH_FN(fn) fn
#endif
#define foreach_x86_64_flags \
_ (sse3, 1, ecx, 0) \
_ (ssse3, 1, ecx, 9) \
_ (sse41, 1, ecx, 19) \
_ (sse42, 1, ecx, 20) \
_ (avx, 1, ecx, 28) \
_ (avx2, 7, ebx, 5) \
_ (avx512f, 7, ebx, 16) \
_ (x86_aes, 1, ecx, 25) \
_ (sha, 7, ebx, 29) \
_ (invariant_tsc, 0x80000007, edx, 8)
#define foreach_aarch64_flags \
_ (fp, 0) \
_ (asimd, 1) \
_ (evtstrm, 2) \
_ (aarch64_aes, 3) \
_ (pmull, 4) \
_ (sha1, 5) \
_ (sha2, 6) \
_ (crc32, 7) \
_ (atomics, 8) \
_ (fphp, 9) \
_ (asimdhp, 10) \
_ (cpuid, 11) \
_ (asimdrdm, 12) \
_ (jscvt, 13) \
_ (fcma, 14) \
_ (lrcpc, 15) \
_ (dcpop, 16) \
_ (sha3, 17) \
_ (sm3, 18) \
_ (sm4, 19) \
_ (asimddp, 20) \
_ (sha512, 21) \
_ (sve, 22)
#if defined(__x86_64__)
#include "cpuid.h"
static inline int
clib_get_cpuid (const u32 lev, u32 * eax, u32 * ebx, u32 * ecx, u32 * edx)
{
if ((u32) __get_cpuid_max (0x80000000 & lev, 0) < lev)
return 0;
if (lev == 7)
__cpuid_count (lev, 0, *eax, *ebx, *ecx, *edx);
else
__cpuid (lev, *eax, *ebx, *ecx, *edx);
return 1;
}
#define _(flag, func, reg, bit) \
static inline int \
clib_cpu_supports_ ## flag() \
{ \
u32 __attribute__((unused)) eax, ebx = 0, ecx = 0, edx = 0; \
clib_get_cpuid (func, &eax, &ebx, &ecx, &edx); \
\
return ((reg & (1 << bit)) != 0); \
}
foreach_x86_64_flags
#undef _
#else /* __x86_64__ */
#define _(flag, func, reg, bit) \
static inline int clib_cpu_supports_ ## flag() { return 0; }
foreach_x86_64_flags
#undef _
#endif /* __x86_64__ */
#if defined(__aarch64__)
#include <sys/auxv.h>
#define _(flag, bit) \
static inline int \
clib_cpu_supports_ ## flag() \
{ \
unsigned long hwcap = getauxval(AT_HWCAP); \
return (hwcap & (1 << bit)); \
}
foreach_aarch64_flags
#undef _
#else /* ! __x86_64__ && !__aarch64__ */
#define _(flag, bit) \
static inline int clib_cpu_supports_ ## flag() { return 0; }
foreach_aarch64_flags
#undef _
#endif /* __x86_64__, __aarch64__ */
/*
* aes is the only feature with the same name in both flag lists
* handle this by prefixing it with the arch name, and handling it
* with the custom function below
*/
static inline int
clib_cpu_supports_aes ()
{
#if defined (__aarch64__)
return clib_cpu_supports_x86_aes ();
#elif defined (__aarch64__)
return clib_cpu_supports_aarch64_aes ();
#else
return 0;
#endif
}
#endif /* included_clib_cpu_h */
format_function_t format_cpu_uarch;
format_function_t format_cpu_model_name;
format_function_t format_cpu_flags;
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
