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
|
/*
* Copyright (c) 2013 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Authors:
* Chris Wilson <chris@chris-wilson.co.uk>
*
*/
#include "config.h"
#ifdef HAVE_CPUID_H
#include <cpuid.h>
#else
#define __get_cpuid_max(x, y) 0
#define __cpuid(level, a, b, c, d) a = b = c = d = 0
#define __cpuid_count(level, count, a, b, c, d) a = b = c = d = 0
#endif
#include "igt_x86.h"
#include <stdio.h>
/**
* SECTION:igt_x86
* @short_description: x86 helper library
* @title: x86
* @include: igt_x86.h
*/
#define BASIC_CPUID 0x0
#define EXTENDED_CPUID 0x80000000
#ifndef bit_MMX
#define bit_MMX (1 << 23)
#endif
#ifndef bit_SSE
#define bit_SSE (1 << 25)
#endif
#ifndef bit_SSE2
#define bit_SSE2 (1 << 26)
#endif
#ifndef bit_SSE3
#define bit_SSE3 (1 << 0)
#endif
#ifndef bit_SSSE3
#define bit_SSSE3 (1 << 9)
#endif
#ifndef bit_SSE4_1
#define bit_SSE4_1 (1 << 19)
#endif
#ifndef bit_SSE4_2
#define bit_SSE4_2 (1 << 20)
#endif
#ifndef bit_OSXSAVE
#define bit_OSXSAVE (1 << 27)
#endif
#ifndef bit_AVX
#define bit_AVX (1 << 28)
#endif
#ifndef bit_AVX2
#define bit_AVX2 (1<<5)
#endif
#define xgetbv(index,eax,edx) \
__asm__ ("xgetbv" : "=a"(eax), "=d"(edx) : "c" (index))
#define has_YMM 0x1
unsigned igt_x86_features(void)
{
unsigned max = __get_cpuid_max(BASIC_CPUID, 0);
unsigned eax, ebx, ecx, edx;
unsigned features = 0;
unsigned extra = 0;
if (max >= 1) {
__cpuid(1, eax, ebx, ecx, edx);
if (ecx & bit_SSE3)
features |= SSE3;
if (ecx & bit_SSSE3)
features |= SSSE3;
if (ecx & bit_SSE4_1)
features |= SSE4_1;
if (ecx & bit_SSE4_2)
features |= SSE4_2;
if (ecx & bit_OSXSAVE) {
unsigned int bv_eax, bv_ecx;
xgetbv(0, bv_eax, bv_ecx);
if ((bv_eax & 6) == 6)
extra |= has_YMM;
}
if ((extra & has_YMM) && (ecx & bit_AVX))
features |= AVX;
if (edx & bit_MMX)
features |= MMX;
if (edx & bit_SSE)
features |= SSE;
if (edx & bit_SSE2)
features |= SSE2;
}
if (max >= 7) {
__cpuid_count(7, 0, eax, ebx, ecx, edx);
if ((extra & has_YMM) && (ebx & bit_AVX2))
features |= AVX2;
}
return features;
}
char *igt_x86_features_to_string(unsigned features, char *line)
{
char *ret = line;
#ifdef __x86_64__
line += sprintf(line, "x86-64");
#else
line += sprintf(line, "x86");
#endif
if (features & SSE2)
line += sprintf(line, ", sse2");
if (features & SSE3)
line += sprintf(line, ", sse3");
if (features & SSSE3)
line += sprintf(line, ", ssse3");
if (features & SSE4_1)
line += sprintf(line, ", sse4.1");
if (features & SSE4_2)
line += sprintf(line, ", sse4.2");
if (features & AVX)
line += sprintf(line, ", avx");
if (features & AVX2)
line += sprintf(line, ", avx2");
return ret;
}
|
