1 /* Common hooks for IBM S/390 and zSeries. 2 Copyright (C) 1999-2013 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 it under 7 the terms of the GNU General Public License as published by the Free 8 Software Foundation; either version 3, or (at your option) any later 9 version. 10 11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12 WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 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 "diagnostic-core.h" 24 #include "tm.h" 25 #include "common/common-target.h" 26 #include "common/common-target-def.h" 27 #include "opts.h" 28 #include "flags.h" 29 30 EXPORTED_CONST int processor_flags_table[] = 31 { 32 /* g5 */ PF_IEEE_FLOAT, 33 /* g6 */ PF_IEEE_FLOAT, 34 /* z900 */ PF_IEEE_FLOAT | PF_ZARCH, 35 /* z990 */ PF_IEEE_FLOAT | PF_ZARCH | PF_LONG_DISPLACEMENT, 36 /* z9-109 */ PF_IEEE_FLOAT | PF_ZARCH | PF_LONG_DISPLACEMENT 37 | PF_EXTIMM, 38 /* z9-ec */ PF_IEEE_FLOAT | PF_ZARCH | PF_LONG_DISPLACEMENT 39 | PF_EXTIMM | PF_DFP, 40 /* z10 */ PF_IEEE_FLOAT | PF_ZARCH | PF_LONG_DISPLACEMENT 41 | PF_EXTIMM | PF_DFP | PF_Z10, 42 /* z196 */ PF_IEEE_FLOAT | PF_ZARCH | PF_LONG_DISPLACEMENT 43 | PF_EXTIMM | PF_DFP | PF_Z10 | PF_Z196, 44 /* zEC12 */ PF_IEEE_FLOAT | PF_ZARCH | PF_LONG_DISPLACEMENT 45 | PF_EXTIMM | PF_DFP | PF_Z10 | PF_Z196 | PF_ZEC12 | PF_TX 46 }; 47 48 /* Change optimizations to be performed, depending on the 49 optimization level. */ 50 51 static const struct default_options s390_option_optimization_table[] = 52 { 53 { OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 }, 54 55 /* Enable -fsched-pressure by default when optimizing. */ 56 { OPT_LEVELS_1_PLUS, OPT_fsched_pressure, NULL, 1 }, 57 58 /* ??? There are apparently still problems with -fcaller-saves. */ 59 { OPT_LEVELS_ALL, OPT_fcaller_saves, NULL, 0 }, 60 61 /* Use MVCLE instructions to decrease code size if requested. */ 62 { OPT_LEVELS_SIZE, OPT_mmvcle, NULL, 1 }, 63 64 { OPT_LEVELS_NONE, 0, NULL, 0 } 65 }; 66 67 /* Implement TARGET_OPTION_INIT_STRUCT. */ 68 69 static void 70 s390_option_init_struct (struct gcc_options *opts) 71 { 72 /* By default, always emit DWARF-2 unwind info. This allows debugging 73 without maintaining a stack frame back-chain. */ 74 opts->x_flag_asynchronous_unwind_tables = 1; 75 } 76 77 /* Implement TARGET_HANDLE_OPTION. */ 78 79 static bool 80 s390_handle_option (struct gcc_options *opts, 81 struct gcc_options *opts_set ATTRIBUTE_UNUSED, 82 const struct cl_decoded_option *decoded, 83 location_t loc) 84 { 85 size_t code = decoded->opt_index; 86 const char *arg = decoded->arg; 87 int value = decoded->value; 88 89 switch (code) 90 { 91 case OPT_march_: 92 opts->x_s390_arch_flags = processor_flags_table[value]; 93 opts->x_s390_arch_string = arg; 94 return true; 95 96 case OPT_mstack_guard_: 97 if (exact_log2 (value) == -1) 98 error_at (loc, "stack guard value must be an exact power of 2"); 99 return true; 100 101 case OPT_mstack_size_: 102 if (exact_log2 (value) == -1) 103 error_at (loc, "stack size must be an exact power of 2"); 104 return true; 105 106 case OPT_mtune_: 107 opts->x_s390_tune_flags = processor_flags_table[value]; 108 return true; 109 110 case OPT_mwarn_framesize_: 111 return sscanf (arg, HOST_WIDE_INT_PRINT_DEC, 112 &opts->x_s390_warn_framesize) == 1; 113 114 default: 115 return true; 116 } 117 } 118 119 #undef TARGET_DEFAULT_TARGET_FLAGS 120 #define TARGET_DEFAULT_TARGET_FLAGS (TARGET_DEFAULT) 121 122 #undef TARGET_HANDLE_OPTION 123 #define TARGET_HANDLE_OPTION s390_handle_option 124 125 #undef TARGET_OPTION_OPTIMIZATION_TABLE 126 #define TARGET_OPTION_OPTIMIZATION_TABLE s390_option_optimization_table 127 128 #undef TARGET_OPTION_INIT_STRUCT 129 #define TARGET_OPTION_INIT_STRUCT s390_option_init_struct 130 131 struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER; 132