1/**************************************************************************
2 *
3 * Copyright 2008 Dennis Smit
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * on the rights to use, copy, modify, merge, publish, distribute, sub
10 * license, and/or sell copies of the Software, and to permit persons to whom
11 * the Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
20 * AUTHORS, COPYRIGHT HOLDERS, AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
23 * USE OR OTHER DEALINGS IN THE SOFTWARE.
24 *
25 ***************************************************************************/
26
27/**
28 * @file
29 * CPU feature detection.
30 *
31 * @author Dennis Smit
32 * @author Based on the work of Eric Anholt <anholt@FreeBSD.org>
33 */
34
35#ifndef _UTIL_CPU_DETECT_H
36#define _UTIL_CPU_DETECT_H
37
38
39#include "pipe/p_config.h"
40#include "util/u_thread.h"
41
42
43#ifdef	__cplusplus
44extern "C" {
45#endif
46
47enum cpu_family {
48   CPU_UNKNOWN,
49
50   CPU_AMD_ZEN1_ZEN2,
51   CPU_AMD_ZEN_HYGON,
52   CPU_AMD_ZEN3,
53   CPU_AMD_ZEN_NEXT,
54   CPU_AMD_LAST,
55};
56
57typedef uint32_t util_affinity_mask[UTIL_MAX_CPUS / 32];
58
59struct util_cpu_caps_t {
60   /**
61    * Number of CPUs available to the process.
62    *
63    * This will be less than or equal to \c max_cpus.  This is the number of
64    * CPUs that are online and available to the process.
65    */
66   int16_t nr_cpus;
67
68   /**
69    * Maximum number of CPUs that can be online in the system.
70    *
71    * This will be greater than or equal to \c nr_cpus.  This is the number of
72    * CPUs installed in the system.  \c nr_cpus will be less if some CPUs are
73    * offline.
74    */
75   int16_t max_cpus;
76
77   enum cpu_family family;
78
79   /* Feature flags */
80   int x86_cpu_type;
81   unsigned cacheline;
82
83   unsigned has_intel:1;
84   unsigned has_tsc:1;
85   unsigned has_mmx:1;
86   unsigned has_mmx2:1;
87   unsigned has_sse:1;
88   unsigned has_sse2:1;
89   unsigned has_sse3:1;
90   unsigned has_ssse3:1;
91   unsigned has_sse4_1:1;
92   unsigned has_sse4_2:1;
93   unsigned has_popcnt:1;
94   unsigned has_avx:1;
95   unsigned has_avx2:1;
96   unsigned has_f16c:1;
97   unsigned has_fma:1;
98   unsigned has_3dnow:1;
99   unsigned has_3dnow_ext:1;
100   unsigned has_xop:1;
101   unsigned has_altivec:1;
102   unsigned has_vsx:1;
103   unsigned has_daz:1;
104   unsigned has_neon:1;
105   unsigned has_msa:1;
106
107   unsigned has_avx512f:1;
108   unsigned has_avx512dq:1;
109   unsigned has_avx512ifma:1;
110   unsigned has_avx512pf:1;
111   unsigned has_avx512er:1;
112   unsigned has_avx512cd:1;
113   unsigned has_avx512bw:1;
114   unsigned has_avx512vl:1;
115   unsigned has_avx512vbmi:1;
116
117   unsigned num_L3_caches;
118   unsigned num_cpu_mask_bits;
119
120   uint16_t cpu_to_L3[UTIL_MAX_CPUS];
121   /* Affinity masks for each L3 cache. */
122   util_affinity_mask *L3_affinity_mask;
123};
124
125#define U_CPU_INVALID_L3 0xffff
126
127static inline const struct util_cpu_caps_t *
128util_get_cpu_caps(void)
129{
130	extern struct util_cpu_caps_t util_cpu_caps;
131
132	/* If you hit this assert, it means that something is using the
133	 * cpu-caps without having first called util_cpu_detect()
134	 */
135	assert(util_cpu_caps.nr_cpus >= 1);
136
137	return &util_cpu_caps;
138}
139
140void util_cpu_detect(void);
141
142
143#ifdef	__cplusplus
144}
145#endif
146
147
148#endif /* _UTIL_CPU_DETECT_H */
149