1 /* Prototypes of target machine for GNU compiler. MIPS version. 2 Copyright (C) 1989-2013 Free Software Foundation, Inc. 3 Contributed by A. Lichnewsky (lich@inria.inria.fr). 4 Changed by Michael Meissner (meissner@osf.org). 5 64-bit r4000 support by Ian Lance Taylor (ian@cygnus.com) and 6 Brendan Eich (brendan@microunity.com). 7 8 This file is part of GCC. 9 10 GCC is free software; you can redistribute it and/or modify 11 it under the terms of the GNU General Public License as published by 12 the Free Software Foundation; either version 3, or (at your option) 13 any later version. 14 15 GCC is distributed in the hope that it will be useful, 16 but WITHOUT ANY WARRANTY; without even the implied warranty of 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 GNU General Public License for more details. 19 20 You should have received a copy of the GNU General Public License 21 along with GCC; see the file COPYING3. If not see 22 <http://www.gnu.org/licenses/>. */ 23 24 #ifndef GCC_MIPS_PROTOS_H 25 #define GCC_MIPS_PROTOS_H 26 27 /* Describes how a symbol is used. 28 29 SYMBOL_CONTEXT_CALL 30 The symbol is used as the target of a call instruction. 31 32 SYMBOL_CONTEXT_LEA 33 The symbol is used in a load-address operation. 34 35 SYMBOL_CONTEXT_MEM 36 The symbol is used as the address in a MEM. */ 37 enum mips_symbol_context { 38 SYMBOL_CONTEXT_CALL, 39 SYMBOL_CONTEXT_LEA, 40 SYMBOL_CONTEXT_MEM 41 }; 42 43 /* Classifies a SYMBOL_REF, LABEL_REF or UNSPEC address. 44 45 SYMBOL_ABSOLUTE 46 The symbol's value will be calculated using absolute relocations, 47 such as %hi and %lo. 48 49 SYMBOL_GP_RELATIVE 50 The symbol's value will be calculated by adding a 16-bit offset 51 from $gp. 52 53 SYMBOL_PC_RELATIVE 54 The symbol's value will be calculated using a MIPS16 PC-relative 55 calculation. 56 57 SYMBOL_GOT_PAGE_OFST 58 The symbol's value will be calculated by loading an address 59 from the GOT and then applying a 16-bit offset. 60 61 SYMBOL_GOT_DISP 62 The symbol's value will be loaded directly from the GOT. 63 64 SYMBOL_GOTOFF_PAGE 65 An UNSPEC wrapper around a SYMBOL_GOT_PAGE_OFST. It represents the 66 offset from _gp of the GOT entry. 67 68 SYMBOL_GOTOFF_DISP 69 An UNSPEC wrapper around a SYMBOL_GOT_DISP. It represents the 70 offset from _gp of the symbol's GOT entry. 71 72 SYMBOL_GOTOFF_CALL 73 Like SYMBOL_GOTOFF_DISP, but used when calling a global function. 74 The GOT entry is allowed to point to a stub rather than to the 75 function itself. 76 77 SYMBOL_GOTOFF_LOADGP 78 An UNSPEC wrapper around a function's address. It represents the 79 offset of _gp from the start of the function. 80 81 SYMBOL_TLS 82 A thread-local symbol. 83 84 SYMBOL_TLSGD 85 SYMBOL_TLSLDM 86 SYMBOL_DTPREL 87 SYMBOL_GOTTPREL 88 SYMBOL_TPREL 89 UNSPEC wrappers around SYMBOL_TLS, corresponding to the 90 thread-local storage relocation operators. 91 92 SYMBOL_64_HIGH 93 For a 64-bit symbolic address X, this is the value of 94 (%highest(X) << 16) + %higher(X). 95 96 SYMBOL_64_MID 97 For a 64-bit symbolic address X, this is the value of 98 (%higher(X) << 16) + %hi(X). 99 100 SYMBOL_64_LOW 101 For a 64-bit symbolic address X, this is the value of 102 (%hi(X) << 16) + %lo(X). 103 104 SYMBOL_HALF 105 An UNSPEC wrapper around any kind of address. It represents the 106 low 16 bits of that address. */ 107 enum mips_symbol_type { 108 SYMBOL_ABSOLUTE, 109 SYMBOL_GP_RELATIVE, 110 SYMBOL_PC_RELATIVE, 111 SYMBOL_GOT_PAGE_OFST, 112 SYMBOL_GOT_DISP, 113 SYMBOL_GOTOFF_PAGE, 114 SYMBOL_GOTOFF_DISP, 115 SYMBOL_GOTOFF_CALL, 116 SYMBOL_GOTOFF_LOADGP, 117 SYMBOL_TLS, 118 SYMBOL_TLSGD, 119 SYMBOL_TLSLDM, 120 SYMBOL_DTPREL, 121 SYMBOL_GOTTPREL, 122 SYMBOL_TPREL, 123 SYMBOL_64_HIGH, 124 SYMBOL_64_MID, 125 SYMBOL_64_LOW, 126 SYMBOL_HALF 127 }; 128 #define NUM_SYMBOL_TYPES (SYMBOL_HALF + 1) 129 130 /* Identifiers a style of $gp initialization sequence. 131 132 LOADGP_NONE 133 No initialization sequence is needed. 134 135 LOADGP_OLDABI 136 The o32 and o64 PIC sequence (the kind traditionally generated 137 by .cpload). 138 139 LOADGP_NEWABI 140 The n32 and n64 PIC sequence (the kind traditionally generated 141 by .cpsetup). 142 143 LOADGP_ABSOLUTE 144 The GNU absolute sequence, as generated by loadgp_absolute. 145 146 LOADGP_RTP 147 The VxWorks RTP PIC sequence, as generated by loadgp_rtp. */ 148 enum mips_loadgp_style { 149 LOADGP_NONE, 150 LOADGP_OLDABI, 151 LOADGP_NEWABI, 152 LOADGP_ABSOLUTE, 153 LOADGP_RTP 154 }; 155 156 struct mips16e_save_restore_info; 157 158 /* Classifies a type of call. 159 160 MIPS_CALL_NORMAL 161 A normal call or call_value pattern. 162 163 MIPS_CALL_SIBCALL 164 A sibcall or sibcall_value pattern. 165 166 MIPS_CALL_EPILOGUE 167 A call inserted in the epilogue. */ 168 enum mips_call_type { 169 MIPS_CALL_NORMAL, 170 MIPS_CALL_SIBCALL, 171 MIPS_CALL_EPILOGUE 172 }; 173 174 /* Controls the conditions under which certain instructions are split. 175 176 SPLIT_IF_NECESSARY 177 Only perform splits that are necessary for correctness 178 (because no unsplit version exists). 179 180 SPLIT_FOR_SPEED 181 Perform splits that are necessary for correctness or 182 beneficial for code speed. 183 184 SPLIT_FOR_SIZE 185 Perform splits that are necessary for correctness or 186 beneficial for code size. */ 187 enum mips_split_type { 188 SPLIT_IF_NECESSARY, 189 SPLIT_FOR_SPEED, 190 SPLIT_FOR_SIZE 191 }; 192 193 extern bool mips_symbolic_constant_p (rtx, enum mips_symbol_context, 194 enum mips_symbol_type *); 195 extern int mips_regno_mode_ok_for_base_p (int, enum machine_mode, bool); 196 extern bool mips_stack_address_p (rtx, enum machine_mode); 197 extern int mips_address_insns (rtx, enum machine_mode, bool); 198 extern int mips_const_insns (rtx); 199 extern int mips_split_const_insns (rtx); 200 extern int mips_load_store_insns (rtx, rtx); 201 extern int mips_idiv_insns (void); 202 extern rtx mips_emit_move (rtx, rtx); 203 #ifdef RTX_CODE 204 extern void mips_emit_binary (enum rtx_code, rtx, rtx, rtx); 205 #endif 206 extern rtx mips_pic_base_register (rtx); 207 extern rtx mips_got_load (rtx, rtx, enum mips_symbol_type); 208 extern bool mips_split_symbol (rtx, rtx, enum machine_mode, rtx *); 209 extern rtx mips_unspec_address (rtx, enum mips_symbol_type); 210 extern rtx mips_strip_unspec_address (rtx); 211 extern void mips_move_integer (rtx, rtx, unsigned HOST_WIDE_INT); 212 extern bool mips_legitimize_move (enum machine_mode, rtx, rtx); 213 214 extern int m16_uimm3_b (rtx, enum machine_mode); 215 extern int m16_simm4_1 (rtx, enum machine_mode); 216 extern int m16_nsimm4_1 (rtx, enum machine_mode); 217 extern int m16_simm5_1 (rtx, enum machine_mode); 218 extern int m16_nsimm5_1 (rtx, enum machine_mode); 219 extern int m16_uimm5_4 (rtx, enum machine_mode); 220 extern int m16_nuimm5_4 (rtx, enum machine_mode); 221 extern int m16_simm8_1 (rtx, enum machine_mode); 222 extern int m16_nsimm8_1 (rtx, enum machine_mode); 223 extern int m16_uimm8_1 (rtx, enum machine_mode); 224 extern int m16_nuimm8_1 (rtx, enum machine_mode); 225 extern int m16_uimm8_m1_1 (rtx, enum machine_mode); 226 extern int m16_uimm8_4 (rtx, enum machine_mode); 227 extern int m16_nuimm8_4 (rtx, enum machine_mode); 228 extern int m16_simm8_8 (rtx, enum machine_mode); 229 extern int m16_nsimm8_8 (rtx, enum machine_mode); 230 231 extern rtx mips_subword (rtx, bool); 232 extern bool mips_split_move_p (rtx, rtx, enum mips_split_type); 233 extern void mips_split_move (rtx, rtx, enum mips_split_type); 234 extern bool mips_split_move_insn_p (rtx, rtx, rtx); 235 extern void mips_split_move_insn (rtx, rtx, rtx); 236 extern const char *mips_output_move (rtx, rtx); 237 extern bool mips_cfun_has_cprestore_slot_p (void); 238 extern bool mips_cprestore_address_p (rtx, bool); 239 extern void mips_save_gp_to_cprestore_slot (rtx, rtx, rtx, rtx); 240 extern void mips_restore_gp_from_cprestore_slot (rtx); 241 #ifdef RTX_CODE 242 extern void mips_expand_scc (rtx *); 243 extern void mips_expand_conditional_branch (rtx *); 244 extern void mips_expand_vcondv2sf (rtx, rtx, rtx, enum rtx_code, rtx, rtx); 245 extern void mips_expand_conditional_move (rtx *); 246 extern void mips_expand_conditional_trap (rtx); 247 #endif 248 extern bool mips_use_pic_fn_addr_reg_p (const_rtx); 249 extern rtx mips_expand_call (enum mips_call_type, rtx, rtx, rtx, rtx, bool); 250 extern void mips_split_call (rtx, rtx); 251 extern bool mips_get_pic_call_symbol (rtx *, int); 252 extern void mips_expand_fcc_reload (rtx, rtx, rtx); 253 extern void mips_set_return_address (rtx, rtx); 254 extern bool mips_move_by_pieces_p (unsigned HOST_WIDE_INT, unsigned int); 255 extern bool mips_store_by_pieces_p (unsigned HOST_WIDE_INT, unsigned int); 256 extern bool mips_expand_block_move (rtx, rtx, rtx); 257 extern void mips_expand_synci_loop (rtx, rtx); 258 259 extern void mips_init_cumulative_args (CUMULATIVE_ARGS *, tree); 260 extern bool mips_pad_arg_upward (enum machine_mode, const_tree); 261 extern bool mips_pad_reg_upward (enum machine_mode, tree); 262 263 extern bool mips_expand_ext_as_unaligned_load (rtx, rtx, HOST_WIDE_INT, 264 HOST_WIDE_INT, bool); 265 extern bool mips_expand_ins_as_unaligned_store (rtx, rtx, HOST_WIDE_INT, 266 HOST_WIDE_INT); 267 extern bool mips_mem_fits_mode_p (enum machine_mode mode, rtx x); 268 extern void mips_order_regs_for_local_alloc (void); 269 extern HOST_WIDE_INT mips_debugger_offset (rtx, HOST_WIDE_INT); 270 271 extern void mips_push_asm_switch (struct mips_asm_switch *); 272 extern void mips_pop_asm_switch (struct mips_asm_switch *); 273 extern void mips_output_external (FILE *, tree, const char *); 274 extern void mips_output_ascii (FILE *, const char *, size_t); 275 extern const char *mips_output_tls_reloc_directive (rtx *); 276 extern void mips_output_aligned_decl_common (FILE *, tree, const char *, 277 unsigned HOST_WIDE_INT, 278 unsigned int); 279 extern void mips_declare_common_object (FILE *, const char *, 280 const char *, unsigned HOST_WIDE_INT, 281 unsigned int, bool); 282 extern void mips_declare_object (FILE *, const char *, const char *, 283 const char *, ...) ATTRIBUTE_PRINTF_4; 284 extern void mips_declare_object_name (FILE *, const char *, tree); 285 extern void mips_finish_declare_object (FILE *, tree, int, int); 286 287 extern bool mips_small_data_pattern_p (rtx); 288 extern rtx mips_rewrite_small_data (rtx); 289 extern HOST_WIDE_INT mips_initial_elimination_offset (int, int); 290 extern rtx mips_return_addr (int, rtx); 291 extern bool mips_must_initialize_gp_p (void); 292 extern enum mips_loadgp_style mips_current_loadgp_style (void); 293 extern void mips_emit_save_slot_move (rtx, rtx, rtx); 294 extern void mips_expand_prologue (void); 295 extern void mips_expand_before_return (void); 296 extern void mips_expand_epilogue (bool); 297 extern bool mips_can_use_return_insn (void); 298 299 extern bool mips_cannot_change_mode_class (enum machine_mode, 300 enum machine_mode, enum reg_class); 301 extern bool mips_dangerous_for_la25_p (rtx); 302 extern bool mips_modes_tieable_p (enum machine_mode, enum machine_mode); 303 extern enum reg_class mips_secondary_reload_class (enum reg_class, 304 enum machine_mode, 305 rtx, bool); 306 extern int mips_class_max_nregs (enum reg_class, enum machine_mode); 307 308 extern int mips_adjust_insn_length (rtx, int); 309 extern void mips_output_load_label (rtx); 310 extern const char *mips_output_conditional_branch (rtx, rtx *, const char *, 311 const char *); 312 extern const char *mips_output_order_conditional_branch (rtx, rtx *, bool); 313 extern const char *mips_output_sync (void); 314 extern const char *mips_output_sync_loop (rtx, rtx *); 315 extern unsigned int mips_sync_loop_insns (rtx, rtx *); 316 extern const char *mips_output_division (const char *, rtx *); 317 extern const char *mips_output_probe_stack_range (rtx, rtx); 318 extern unsigned int mips_hard_regno_nregs (int, enum machine_mode); 319 extern bool mips_linked_madd_p (rtx, rtx); 320 extern bool mips_store_data_bypass_p (rtx, rtx); 321 extern int mips_dspalu_bypass_p (rtx, rtx); 322 extern rtx mips_prefetch_cookie (rtx, rtx); 323 324 extern const char *current_section_name (void); 325 extern unsigned int current_section_flags (void); 326 extern bool mips_use_ins_ext_p (rtx, HOST_WIDE_INT, HOST_WIDE_INT); 327 328 extern const char *mips16e_output_save_restore (rtx, HOST_WIDE_INT); 329 extern bool mips16e_save_restore_pattern_p (rtx, HOST_WIDE_INT, 330 struct mips16e_save_restore_info *); 331 332 extern bool mask_low_and_shift_p (enum machine_mode, rtx, rtx, int); 333 extern int mask_low_and_shift_len (enum machine_mode, rtx, rtx); 334 extern bool and_operands_ok (enum machine_mode, rtx, rtx); 335 336 union mips_gen_fn_ptrs 337 { 338 rtx (*fn_6) (rtx, rtx, rtx, rtx, rtx, rtx); 339 rtx (*fn_5) (rtx, rtx, rtx, rtx, rtx); 340 rtx (*fn_4) (rtx, rtx, rtx, rtx); 341 }; 342 343 extern void mips_expand_atomic_qihi (union mips_gen_fn_ptrs, 344 rtx, rtx, rtx, rtx); 345 346 extern void mips_expand_vector_init (rtx, rtx); 347 extern bool mips_expand_vec_perm_const (rtx op[4]); 348 extern void mips_expand_vec_unpack (rtx op[2], bool, bool); 349 extern void mips_expand_vec_reduc (rtx, rtx, rtx (*)(rtx, rtx, rtx)); 350 extern void mips_expand_vec_minmax (rtx, rtx, rtx, 351 rtx (*) (rtx, rtx, rtx), bool); 352 353 extern rtx mips_expand_thread_pointer (rtx); 354 355 extern bool mips_eh_uses (unsigned int); 356 extern bool mips_epilogue_uses (unsigned int); 357 extern void mips_final_prescan_insn (rtx, rtx *, int); 358 extern int mips_trampoline_code_size (void); 359 extern void mips_function_profiler (FILE *); 360 361 typedef rtx (*mulsidi3_gen_fn) (rtx, rtx, rtx); 362 #ifdef RTX_CODE 363 extern mulsidi3_gen_fn mips_mulsidi3_gen_fn (enum rtx_code); 364 #endif 365 366 #endif /* ! GCC_MIPS_PROTOS_H */ 367