1 /* Common hooks for Synopsys DesignWare ARC 2 Copyright (C) 1994-2015 Free Software Foundation, Inc. 3 Contributor: Joern Rennecke <joern.rennecke@embecosm.com> 4 on behalf of Synopsys Inc. 5 6 This file is part of GCC. 7 8 GCC is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3, or (at your option) 11 any later version. 12 13 GCC is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with GCC; see the file COPYING3. If not see 20 <http://www.gnu.org/licenses/>. */ 21 22 #include "config.h" 23 #include "system.h" 24 #include "coretypes.h" 25 #include "diagnostic-core.h" 26 #include "tm.h" 27 #include "common/common-target.h" 28 #include "opts.h" 29 #include "flags.h" 30 31 static void 32 arc_option_init_struct (struct gcc_options *opts) 33 { 34 opts->x_flag_no_common = 255; /* Mark as not user-initialized. */ 35 36 /* Which cpu we're compiling for (A5, ARC600, ARC601, ARC700). */ 37 arc_cpu = PROCESSOR_NONE; 38 } 39 40 /* Set default optimization options. */ 41 /* The conditions are incomplete, so we rely on the evaluation order here, 42 which goes from first to last, i.e. the last match prevails. */ 43 /* ??? But this trick only works for reject_negative options. Approximate 44 missing option combination. */ 45 #define OPT_LEVELS_3_PLUS_SPEED_ONLY OPT_LEVELS_3_PLUS 46 static const struct default_options arc_option_optimization_table[] = 47 { 48 { OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 }, 49 { OPT_LEVELS_ALL, OPT_mRcq, NULL, 1 }, 50 { OPT_LEVELS_ALL, OPT_mRcw, NULL, 1 }, 51 { OPT_LEVELS_ALL, OPT_msize_level_, NULL, 1 }, 52 { OPT_LEVELS_3_PLUS_SPEED_ONLY, OPT_msize_level_, NULL, 0 }, 53 { OPT_LEVELS_SIZE, OPT_msize_level_, NULL, 3 }, 54 { OPT_LEVELS_3_PLUS_SPEED_ONLY, OPT_malign_call, NULL, 1 }, 55 { OPT_LEVELS_ALL, OPT_mearly_cbranchsi, NULL, 1 }, 56 { OPT_LEVELS_ALL, OPT_mbbit_peephole, NULL, 1 }, 57 { OPT_LEVELS_SIZE, OPT_mq_class, NULL, 1 }, 58 { OPT_LEVELS_SIZE, OPT_mcase_vector_pcrel, NULL, 1 }, 59 { OPT_LEVELS_SIZE, OPT_mcompact_casesi, NULL, 1 }, 60 { OPT_LEVELS_NONE, 0, NULL, 0 } 61 }; 62 63 /* Process options. */ 64 static bool 65 arc_handle_option (struct gcc_options *opts, struct gcc_options *opts_set, 66 const struct cl_decoded_option *decoded, 67 location_t loc) 68 { 69 size_t code = decoded->opt_index; 70 int value = decoded->value; 71 72 switch (code) 73 { 74 static int mcpu_seen = PROCESSOR_NONE; 75 case OPT_mcpu_: 76 /* N.B., at this point arc_cpu has already been set to its new value by 77 our caller, so comparing arc_cpu with PROCESSOR_NONE is pointless. */ 78 79 if (mcpu_seen != PROCESSOR_NONE && mcpu_seen != value) 80 warning_at (loc, 0, "multiple -mcpu= options specified."); 81 mcpu_seen = value; 82 83 switch (value) 84 { 85 case PROCESSOR_A5: 86 case PROCESSOR_ARC600: 87 case PROCESSOR_ARC700: 88 if (! (opts_set->x_target_flags & MASK_BARREL_SHIFTER) ) 89 opts->x_target_flags |= MASK_BARREL_SHIFTER; 90 break; 91 case PROCESSOR_ARC601: 92 if (! (opts_set->x_target_flags & MASK_BARREL_SHIFTER) ) 93 opts->x_target_flags &= ~MASK_BARREL_SHIFTER; 94 break; 95 default: 96 gcc_unreachable (); 97 } 98 } 99 100 return true; 101 } 102 103 #define TARGET_OPTION_INIT_STRUCT arc_option_init_struct 104 #define TARGET_OPTION_OPTIMIZATION_TABLE arc_option_optimization_table 105 #define TARGET_HANDLE_OPTION arc_handle_option 106 107 #define DEFAULT_NO_SDATA (TARGET_SDATA_DEFAULT ? 0 : MASK_NO_SDATA_SET) 108 109 /* We default to ARC700, which has the barrel shifter enabled. */ 110 #define TARGET_DEFAULT_TARGET_FLAGS \ 111 (MASK_BARREL_SHIFTER|MASK_VOLATILE_CACHE_SET|DEFAULT_NO_SDATA) 112 113 114 #include "common/common-target-def.h" 115 116 struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER; 117