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
|
/* Subroutines for the gcc driver.
Copyright (C) 2009-2013 Free Software Foundation, Inc.
Contributed by Arthur Loiret <aloiret@debian.org>
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
/* Chip family type IDs, returned by implver instruction. */
#define IMPLVER_EV4_FAMILY 0 /* LCA/EV4/EV45 */
#define IMPLVER_EV5_FAMILY 1 /* EV5/EV56/PCA56 */
#define IMPLVER_EV6_FAMILY 2 /* EV6 */
#define IMPLVER_EV7_FAMILY 3 /* EV7 */
/* Bit defines for amask instruction. */
#define AMASK_BWX 0x1 /* byte/word extension. */
#define AMASK_FIX 0x2 /* sqrt and f <-> i conversions
extension. */
#define AMASK_CIX 0x4 /* count extension. */
#define AMASK_MVI 0x100 /* multimedia extension. */
#define AMASK_PRECISE 0x200 /* Precise arithmetic traps. */
#define AMASK_LOCKPFTCHOK 0x1000 /* Safe to prefetch lock cache
block. */
/* This will be called by the spec parser in gcc.c when it sees
a %:local_cpu_detect(args) construct. Currently it will be called
with either "cpu" or "tune" as argument depending on if -mcpu=native
or -mtune=native is to be substituted.
It returns a string containing new command line parameters to be
put at the place of the above two options, depending on what CPU
this is executed. E.g. "-mcpu=ev6" on an Alpha 21264 for
-mcpu=native. If the routine can't detect a known processor,
the -mcpu or -mtune option is discarded.
ARGC and ARGV are set depending on the actual arguments given
in the spec. */
const char *
host_detect_local_cpu (int argc, const char **argv)
{
static const struct cpu_types {
long implver;
long amask;
const char *const cpu;
} cpu_types[] = {
{ IMPLVER_EV7_FAMILY, AMASK_BWX|AMASK_MVI|AMASK_FIX|AMASK_CIX, "ev67" },
{ IMPLVER_EV6_FAMILY, AMASK_BWX|AMASK_MVI|AMASK_FIX|AMASK_CIX, "ev67" },
{ IMPLVER_EV6_FAMILY, AMASK_BWX|AMASK_MVI|AMASK_FIX, "ev6" },
{ IMPLVER_EV5_FAMILY, AMASK_BWX|AMASK_MVI, "pca56" },
{ IMPLVER_EV5_FAMILY, AMASK_BWX, "ev56" },
{ IMPLVER_EV5_FAMILY, 0, "ev5" },
{ IMPLVER_EV4_FAMILY, 0, "ev4" },
{ 0, 0, NULL }
};
long implver;
long amask;
const char *cpu;
int i;
if (argc < 1)
return NULL;
if (strcmp (argv[0], "cpu") && strcmp (argv[0], "tune"))
return NULL;
implver = __builtin_alpha_implver ();
amask = __builtin_alpha_amask (~0L);
cpu = NULL;
for (i = 0; cpu_types[i].cpu != NULL; i++)
if (implver == cpu_types[i].implver
&& (~amask & cpu_types[i].amask) == cpu_types[i].amask)
{
cpu = cpu_types[i].cpu;
break;
}
if (cpu == NULL)
return NULL;
return concat ("-m", argv[0], "=", cpu, NULL);
}
|
