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comparison gcc/config/arm/driver-arm.c @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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children 84e7813d76e9
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68:561a7518be6b 111:04ced10e8804
1 /* Subroutines for the gcc driver.
2 Copyright (C) 2011-2017 Free Software Foundation, Inc.
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
20 #include "config.h"
21 #include "system.h"
22 #include "coretypes.h"
23 #include "tm.h"
24 #include "configargs.h"
25
26 struct vendor_cpu {
27 const char *part_no;
28 const char *arch_name;
29 const char *cpu_name;
30 };
31
32 static struct vendor_cpu arm_cpu_table[] = {
33 {"0x926", "armv5te", "arm926ej-s"},
34 {"0xa26", "armv5te", "arm1026ej-s"},
35 {"0xb02", "armv6k", "mpcore"},
36 {"0xb36", "armv6j", "arm1136j-s"},
37 {"0xb56", "armv6t2", "arm1156t2-s"},
38 /* armv6kz is the correct spelling for ARMv6KZ but may not be supported in
39 the version of binutils used. The incorrect spelling is supported in
40 legacy and current binutils so that is used instead. */
41 {"0xb76", "armv6zk", "arm1176jz-s"},
42 {"0xc05", "armv7-a", "cortex-a5"},
43 {"0xc07", "armv7ve", "cortex-a7"},
44 {"0xc08", "armv7-a", "cortex-a8"},
45 {"0xc09", "armv7-a", "cortex-a9"},
46 {"0xc0d", "armv7ve", "cortex-a12"},
47 {"0xc0e", "armv7ve", "cortex-a17"},
48 {"0xc0f", "armv7ve", "cortex-a15"},
49 {"0xd01", "armv8-a+crc", "cortex-a32"},
50 {"0xd04", "armv8-a+crc", "cortex-a35"},
51 {"0xd03", "armv8-a+crc", "cortex-a53"},
52 {"0xd07", "armv8-a+crc", "cortex-a57"},
53 {"0xd08", "armv8-a+crc", "cortex-a72"},
54 {"0xd09", "armv8-a+crc", "cortex-a73"},
55 {"0xd05", "armv8.2-a+fp16", "cortex-a55"},
56 {"0xd0a", "armv8.2-a+fp16", "cortex-a75"},
57 {"0xc14", "armv7-r", "cortex-r4"},
58 {"0xc15", "armv7-r", "cortex-r5"},
59 {"0xc17", "armv7-r", "cortex-r7"},
60 {"0xc18", "armv7-r", "cortex-r8"},
61 {"0xd13", "armv8-r+crc", "cortex-r52"},
62 {"0xc20", "armv6-m", "cortex-m0"},
63 {"0xc21", "armv6-m", "cortex-m1"},
64 {"0xc23", "armv7-m", "cortex-m3"},
65 {"0xc24", "armv7e-m", "cortex-m4"},
66 {NULL, NULL, NULL}
67 };
68
69 static struct {
70 const char *vendor_no;
71 const struct vendor_cpu *vendor_parts;
72 } vendors[] = {
73 {"0x41", arm_cpu_table},
74 {NULL, NULL}
75 };
76
77 /* This will be called by the spec parser in gcc.c when it sees
78 a %:local_cpu_detect(args) construct. Currently it will be called
79 with either "arch", "cpu" or "tune" as argument depending on if
80 -march=native, -mcpu=native or -mtune=native is to be substituted.
81
82 It returns a string containing new command line parameters to be
83 put at the place of the above two options, depending on what CPU
84 this is executed. E.g. "-march=armv7-a" on a Cortex-A8 for
85 -march=native. If the routine can't detect a known processor,
86 the -march or -mtune option is discarded.
87
88 ARGC and ARGV are set depending on the actual arguments given
89 in the spec. */
90 const char *
91 host_detect_local_cpu (int argc, const char **argv)
92 {
93 const char *val = NULL;
94 char buf[128];
95 FILE *f = NULL;
96 bool arch;
97 const struct vendor_cpu *cpu_table = NULL;
98
99 if (argc < 1)
100 goto not_found;
101
102 arch = strcmp (argv[0], "arch") == 0;
103 if (!arch && strcmp (argv[0], "cpu") != 0 && strcmp (argv[0], "tune"))
104 goto not_found;
105
106 f = fopen ("/proc/cpuinfo", "r");
107 if (f == NULL)
108 goto not_found;
109
110 while (fgets (buf, sizeof (buf), f) != NULL)
111 {
112 /* Ensure that CPU implementer is ARM (0x41). */
113 if (strncmp (buf, "CPU implementer", sizeof ("CPU implementer") - 1) == 0)
114 {
115 int i;
116 for (i = 0; vendors[i].vendor_no != NULL; i++)
117 if (strstr (buf, vendors[i].vendor_no) != NULL)
118 {
119 cpu_table = vendors[i].vendor_parts;
120 break;
121 }
122 }
123
124 /* Detect arch/cpu. */
125 if (strncmp (buf, "CPU part", sizeof ("CPU part") - 1) == 0)
126 {
127 int i;
128
129 if (cpu_table == NULL)
130 goto not_found;
131
132 for (i = 0; cpu_table[i].part_no != NULL; i++)
133 if (strstr (buf, cpu_table[i].part_no) != NULL)
134 {
135 val = arch ? cpu_table[i].arch_name : cpu_table[i].cpu_name;
136 break;
137 }
138 break;
139 }
140 }
141
142 if (val)
143 {
144 fclose (f);
145 return concat ("-m", argv[0], "=", val, NULL);
146 }
147
148 not_found:
149 {
150 unsigned int i;
151 unsigned int opt;
152 const char *search[] = {NULL, "arch"};
153
154 if (f)
155 fclose (f);
156
157 search[0] = argv[0];
158 for (opt = 0; opt < ARRAY_SIZE (search); opt++)
159 for (i = 0; i < ARRAY_SIZE (configure_default_options); i++)
160 if (strcmp (configure_default_options[i].name, search[opt]) == 0)
161 return concat ("-m", search[opt], "=",
162 configure_default_options[i].value, NULL);
163 return NULL;
164 }
165 }