1 /*
2
3 BLIS
4 An object-based framework for developing high-performance BLAS-like
5 libraries.
6
7 Copyright (C) 2015, The University of Texas at Austin
8
9 Redistribution and use in source and binary forms, with or without
10 modification, are permitted provided that the following conditions are
11 met:
12 - Redistributions of source code must retain the above copyright
13 notice, this list of conditions and the following disclaimer.
14 - Redistributions in binary form must reproduce the above copyright
15 notice, this list of conditions and the following disclaimer in the
16 documentation and/or other materials provided with the distribution.
17 - Neither the name(s) of the copyright holder(s) nor the names of its
18 contributors may be used to endorse or promote products derived
19 from this software without specific prior written permission.
20
21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32
33 */
34
35 #include <stdio.h>
36 #include <string.h>
37
38 #define CPUNAME_REFERENCE 0
39 #define CPUNAME_ARMV7 1
40 #define CPUNAME_CORTEXA9 2
41 #define CPUNAME_CORTEXA15 3
42
43 static char *cpuname[] = {
44 "reference",
45 "armv7a",
46 "cortex-a9",
47 "cortex-a15",
48 };
49
50
get_feature(char * search)51 int get_feature(char *search)
52 {
53 FILE *infile;
54 char buffer[2048], *p,*t;
55 p = (char *) NULL;
56
57 infile = fopen("/proc/cpuinfo", "r");
58 if (infile == NULL) {
59 return 0;
60 }
61
62 while (fgets(buffer, sizeof(buffer), infile)) {
63 if (!strncmp("Features", buffer, 8)) {
64 p = strchr(buffer, ':') + 2;
65 break;
66 }
67 }
68 fclose(infile);
69
70 if( p == NULL ) return 0;
71
72 t = strtok(p," ");
73 if (t != NULL) {
74 if (!strcmp(t, search)) { return 1; }
75 }
76 while( t = strtok(NULL," ")){
77 if (!strcmp(t, search)) { return 1; }
78 }
79
80 return 0;
81 }
82
cpu_detect(void)83 int cpu_detect(void)
84 {
85 FILE *infile;
86 char buffer[512], *p;
87 p = (char *) NULL ;
88
89 infile = fopen("/proc/cpuinfo", "r");
90 if (infile == NULL) {
91 return CPUNAME_REFERENCE;
92 }
93 while (fgets(buffer, sizeof(buffer), infile)) {
94 if (!strncmp("CPU part", buffer, 8)) {
95 p = strchr(buffer, ':') + 2;
96 break;
97 }
98 }
99 fclose(infile);
100
101 if(p != NULL) {
102 if (strstr(p, "0xc09")) {
103 if(get_feature("neon"))
104 return CPUNAME_CORTEXA9;
105 else
106 return CPUNAME_ARMV7;
107 }
108 if (strstr(p, "0xc0f")) {
109 if(get_feature("neon"))
110 return CPUNAME_CORTEXA15;
111 else
112 return CPUNAME_ARMV7;
113 }
114 }
115
116 p = (char *) NULL ;
117 infile = fopen("/proc/cpuinfo", "r");
118 if (infile == NULL) {
119 return CPUNAME_REFERENCE;
120 }
121
122 while (fgets(buffer, sizeof(buffer), infile)) {
123 if ((!strncmp("model name", buffer, 10)) || (!strncmp("Processor", buffer, 9))) {
124 p = strchr(buffer, ':') + 2;
125 break;
126 }
127 }
128 fclose(infile);
129
130 if(p != NULL) {
131 if (strstr(p, "ARMv7")) {
132 return CPUNAME_ARMV7;
133 }
134 }
135
136 return CPUNAME_REFERENCE;
137 }
138
main()139 int main()
140 {
141 int cpuname_id;
142
143 cpuname_id=cpu_detect();
144 printf("%s\n", cpuname[cpuname_id]);
145 return 0;
146 }
147