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33aa08b3 | 1 | /* Subroutines for the gcc driver. |
8d9254fc | 2 | Copyright (C) 2011-2020 Free Software Foundation, Inc. |
33aa08b3 AS |
3 | |
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GCC is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GCC; see the file COPYING3. If not see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
8fcc61f8 RS |
20 | #define IN_TARGET_CODE 1 |
21 | ||
33aa08b3 AS |
22 | #include "config.h" |
23 | #include "system.h" | |
24 | #include "coretypes.h" | |
25 | #include "tm.h" | |
26 | #include "configargs.h" | |
27 | ||
b02160e5 RE |
28 | struct vendor_cpu |
29 | { | |
33aa08b3 AS |
30 | const char *part_no; |
31 | const char *arch_name; | |
32 | const char *cpu_name; | |
33 | }; | |
34 | ||
b02160e5 RE |
35 | struct vendor |
36 | { | |
33aa08b3 AS |
37 | const char *vendor_no; |
38 | const struct vendor_cpu *vendor_parts; | |
33aa08b3 AS |
39 | }; |
40 | ||
b02160e5 RE |
41 | #include "arm-native.h" |
42 | ||
33aa08b3 AS |
43 | /* This will be called by the spec parser in gcc.c when it sees |
44 | a %:local_cpu_detect(args) construct. Currently it will be called | |
45 | with either "arch", "cpu" or "tune" as argument depending on if | |
46 | -march=native, -mcpu=native or -mtune=native is to be substituted. | |
47 | ||
48 | It returns a string containing new command line parameters to be | |
49 | put at the place of the above two options, depending on what CPU | |
50 | this is executed. E.g. "-march=armv7-a" on a Cortex-A8 for | |
51 | -march=native. If the routine can't detect a known processor, | |
52 | the -march or -mtune option is discarded. | |
53 | ||
54 | ARGC and ARGV are set depending on the actual arguments given | |
55 | in the spec. */ | |
56 | const char * | |
57 | host_detect_local_cpu (int argc, const char **argv) | |
58 | { | |
59 | const char *val = NULL; | |
60 | char buf[128]; | |
e9d662bb | 61 | FILE *f = NULL; |
33aa08b3 AS |
62 | bool arch; |
63 | const struct vendor_cpu *cpu_table = NULL; | |
64 | ||
65 | if (argc < 1) | |
66 | goto not_found; | |
67 | ||
68 | arch = strcmp (argv[0], "arch") == 0; | |
69 | if (!arch && strcmp (argv[0], "cpu") != 0 && strcmp (argv[0], "tune")) | |
70 | goto not_found; | |
71 | ||
72 | f = fopen ("/proc/cpuinfo", "r"); | |
73 | if (f == NULL) | |
74 | goto not_found; | |
75 | ||
76 | while (fgets (buf, sizeof (buf), f) != NULL) | |
77 | { | |
b02160e5 | 78 | /* Find the vendor table associated with this implementer. */ |
33aa08b3 AS |
79 | if (strncmp (buf, "CPU implementer", sizeof ("CPU implementer") - 1) == 0) |
80 | { | |
81 | int i; | |
b02160e5 RE |
82 | for (i = 0; vendors_table[i].vendor_no != NULL; i++) |
83 | if (strstr (buf, vendors_table[i].vendor_no) != NULL) | |
33aa08b3 | 84 | { |
b02160e5 | 85 | cpu_table = vendors_table[i].vendor_parts; |
33aa08b3 AS |
86 | break; |
87 | } | |
88 | } | |
89 | ||
90 | /* Detect arch/cpu. */ | |
91 | if (strncmp (buf, "CPU part", sizeof ("CPU part") - 1) == 0) | |
92 | { | |
93 | int i; | |
94 | ||
95 | if (cpu_table == NULL) | |
96 | goto not_found; | |
97 | ||
98 | for (i = 0; cpu_table[i].part_no != NULL; i++) | |
99 | if (strstr (buf, cpu_table[i].part_no) != NULL) | |
100 | { | |
101 | val = arch ? cpu_table[i].arch_name : cpu_table[i].cpu_name; | |
102 | break; | |
103 | } | |
104 | break; | |
105 | } | |
106 | } | |
107 | ||
6b32fd17 KT |
108 | if (val) |
109 | { | |
110 | fclose (f); | |
111 | return concat ("-m", argv[0], "=", val, NULL); | |
112 | } | |
33aa08b3 AS |
113 | |
114 | not_found: | |
115 | { | |
116 | unsigned int i; | |
117 | unsigned int opt; | |
118 | const char *search[] = {NULL, "arch"}; | |
6d3f1a13 | 119 | |
e9d662bb AS |
120 | if (f) |
121 | fclose (f); | |
6d3f1a13 | 122 | |
33aa08b3 AS |
123 | search[0] = argv[0]; |
124 | for (opt = 0; opt < ARRAY_SIZE (search); opt++) | |
125 | for (i = 0; i < ARRAY_SIZE (configure_default_options); i++) | |
126 | if (strcmp (configure_default_options[i].name, search[opt]) == 0) | |
127 | return concat ("-m", search[opt], "=", | |
128 | configure_default_options[i].value, NULL); | |
129 | return NULL; | |
130 | } | |
131 | } |