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1 /* Subroutines for the gcc driver.
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145
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2 Copyright (C) 2009-2020 Free Software Foundation, Inc.
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3 Contributed by Arthur Loiret <aloiret@debian.org>
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify
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8 it under the terms of the GNU General Public License as published by
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9 the Free Software Foundation; either version 3, or (at your option)
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10 any later version.
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11
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12 GCC is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>. */
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20
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131
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21 #define IN_TARGET_CODE 1
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22
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23 #include "config.h"
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24 #include "system.h"
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25 #include "coretypes.h"
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26 #include "tm.h"
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27
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111
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28 /* Chip family type IDs, returned by implver instruction. */
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29 #define IMPLVER_EV4_FAMILY 0 /* LCA/EV4/EV45 */
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30 #define IMPLVER_EV5_FAMILY 1 /* EV5/EV56/PCA56 */
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31 #define IMPLVER_EV6_FAMILY 2 /* EV6 */
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32 #define IMPLVER_EV7_FAMILY 3 /* EV7 */
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33
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34 /* Bit defines for amask instruction. */
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35 #define AMASK_BWX 0x1 /* byte/word extension. */
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36 #define AMASK_FIX 0x2 /* sqrt and f <-> i conversions
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37 extension. */
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38 #define AMASK_CIX 0x4 /* count extension. */
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39 #define AMASK_MVI 0x100 /* multimedia extension. */
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40 #define AMASK_PRECISE 0x200 /* Precise arithmetic traps. */
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41 #define AMASK_LOCKPFTCHOK 0x1000 /* Safe to prefetch lock cache
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42 block. */
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43
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44 /* This will be called by the spec parser in gcc.c when it sees
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45 a %:local_cpu_detect(args) construct. Currently it will be called
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46 with either "cpu" or "tune" as argument depending on if -mcpu=native
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47 or -mtune=native is to be substituted.
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48
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49 It returns a string containing new command line parameters to be
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50 put at the place of the above two options, depending on what CPU
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51 this is executed. E.g. "-mcpu=ev6" on an Alpha 21264 for
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52 -mcpu=native. If the routine can't detect a known processor,
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53 the -mcpu or -mtune option is discarded.
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54
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55 ARGC and ARGV are set depending on the actual arguments given
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56 in the spec. */
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57 const char *
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58 host_detect_local_cpu (int argc, const char **argv)
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59 {
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111
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60 static const struct cpu_types {
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61 long implver;
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62 long amask;
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63 const char *const cpu;
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64 } cpu_types[] = {
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65 { IMPLVER_EV7_FAMILY, AMASK_BWX|AMASK_MVI|AMASK_FIX|AMASK_CIX, "ev67" },
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66 { IMPLVER_EV6_FAMILY, AMASK_BWX|AMASK_MVI|AMASK_FIX|AMASK_CIX, "ev67" },
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67 { IMPLVER_EV6_FAMILY, AMASK_BWX|AMASK_MVI|AMASK_FIX, "ev6" },
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68 { IMPLVER_EV5_FAMILY, AMASK_BWX|AMASK_MVI, "pca56" },
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69 { IMPLVER_EV5_FAMILY, AMASK_BWX, "ev56" },
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70 { IMPLVER_EV5_FAMILY, 0, "ev5" },
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71 { IMPLVER_EV4_FAMILY, 0, "ev4" },
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72 { 0, 0, NULL }
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0
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73 };
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111
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74 long implver;
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75 long amask;
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76 const char *cpu;
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0
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77 int i;
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78
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79 if (argc < 1)
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80 return NULL;
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81
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82 if (strcmp (argv[0], "cpu") && strcmp (argv[0], "tune"))
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83 return NULL;
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84
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85 implver = __builtin_alpha_implver ();
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86 amask = __builtin_alpha_amask (~0L);
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87 cpu = NULL;
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0
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88
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89 for (i = 0; cpu_types[i].cpu != NULL; i++)
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90 if (implver == cpu_types[i].implver
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91 && (~amask & cpu_types[i].amask) == cpu_types[i].amask)
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92 {
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93 cpu = cpu_types[i].cpu;
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94 break;
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95 }
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96
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97 if (cpu == NULL)
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98 return NULL;
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99
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100 return concat ("-m", argv[0], "=", cpu, NULL);
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101 }
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