1 /* Subroutines for the gcc driver. 2 Copyright (C) 2009-2018 Free Software Foundation, Inc. 3 Contributed by Arthur Loiret <aloiret@debian.org> 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3, or (at your option) 10 any later version. 11 12 GCC is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GCC; see the file COPYING3. If not see 19 <http://www.gnu.org/licenses/>. */ 20 21 #define IN_TARGET_CODE 1 22 23 #include "config.h" 24 #include "system.h" 25 #include "coretypes.h" 26 #include "tm.h" 27 28 /* Chip family type IDs, returned by implver instruction. */ 29 #define IMPLVER_EV4_FAMILY 0 /* LCA/EV4/EV45 */ 30 #define IMPLVER_EV5_FAMILY 1 /* EV5/EV56/PCA56 */ 31 #define IMPLVER_EV6_FAMILY 2 /* EV6 */ 32 #define IMPLVER_EV7_FAMILY 3 /* EV7 */ 33 34 /* Bit defines for amask instruction. */ 35 #define AMASK_BWX 0x1 /* byte/word extension. */ 36 #define AMASK_FIX 0x2 /* sqrt and f <-> i conversions 37 extension. */ 38 #define AMASK_CIX 0x4 /* count extension. */ 39 #define AMASK_MVI 0x100 /* multimedia extension. */ 40 #define AMASK_PRECISE 0x200 /* Precise arithmetic traps. */ 41 #define AMASK_LOCKPFTCHOK 0x1000 /* Safe to prefetch lock cache 42 block. */ 43 44 /* This will be called by the spec parser in gcc.c when it sees 45 a %:local_cpu_detect(args) construct. Currently it will be called 46 with either "cpu" or "tune" as argument depending on if -mcpu=native 47 or -mtune=native is to be substituted. 48 49 It returns a string containing new command line parameters to be 50 put at the place of the above two options, depending on what CPU 51 this is executed. E.g. "-mcpu=ev6" on an Alpha 21264 for 52 -mcpu=native. If the routine can't detect a known processor, 53 the -mcpu or -mtune option is discarded. 54 55 ARGC and ARGV are set depending on the actual arguments given 56 in the spec. */ 57 const char * 58 host_detect_local_cpu (int argc, const char **argv) 59 { 60 static const struct cpu_types { 61 long implver; 62 long amask; 63 const char *const cpu; 64 } cpu_types[] = { 65 { IMPLVER_EV7_FAMILY, AMASK_BWX|AMASK_MVI|AMASK_FIX|AMASK_CIX, "ev67" }, 66 { IMPLVER_EV6_FAMILY, AMASK_BWX|AMASK_MVI|AMASK_FIX|AMASK_CIX, "ev67" }, 67 { IMPLVER_EV6_FAMILY, AMASK_BWX|AMASK_MVI|AMASK_FIX, "ev6" }, 68 { IMPLVER_EV5_FAMILY, AMASK_BWX|AMASK_MVI, "pca56" }, 69 { IMPLVER_EV5_FAMILY, AMASK_BWX, "ev56" }, 70 { IMPLVER_EV5_FAMILY, 0, "ev5" }, 71 { IMPLVER_EV4_FAMILY, 0, "ev4" }, 72 { 0, 0, NULL } 73 }; 74 long implver; 75 long amask; 76 const char *cpu; 77 int i; 78 79 if (argc < 1) 80 return NULL; 81 82 if (strcmp (argv[0], "cpu") && strcmp (argv[0], "tune")) 83 return NULL; 84 85 implver = __builtin_alpha_implver (); 86 amask = __builtin_alpha_amask (~0L); 87 cpu = NULL; 88 89 for (i = 0; cpu_types[i].cpu != NULL; i++) 90 if (implver == cpu_types[i].implver 91 && (~amask & cpu_types[i].amask) == cpu_types[i].amask) 92 { 93 cpu = cpu_types[i].cpu; 94 break; 95 } 96 97 if (cpu == NULL) 98 return NULL; 99 100 return concat ("-m", argv[0], "=", cpu, NULL); 101 } 102