1 /* Prototypes of target machine for GNU compiler. MIPS version. 2 Copyright (C) 1989-2019 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, machine_mode, bool); 196 extern bool mips_stack_address_p (rtx, machine_mode); 197 extern int mips_address_insns (rtx, machine_mode, bool); 198 extern int mips_const_insns (rtx); 199 extern int mips_split_const_insns (rtx); 200 extern int mips_split_128bit_const_insns (rtx); 201 extern int mips_load_store_insns (rtx, rtx_insn *); 202 extern int mips_idiv_insns (machine_mode); 203 extern rtx_insn *mips_emit_move (rtx, rtx); 204 #ifdef RTX_CODE 205 extern void mips_emit_binary (enum rtx_code, rtx, rtx, rtx); 206 #endif 207 extern rtx mips_pic_base_register (rtx); 208 extern rtx mips_got_load (rtx, rtx, enum mips_symbol_type); 209 extern bool mips_split_symbol (rtx, rtx, machine_mode, rtx *); 210 extern rtx mips_unspec_address (rtx, enum mips_symbol_type); 211 extern rtx mips_strip_unspec_address (rtx); 212 extern void mips_move_integer (rtx, rtx, unsigned HOST_WIDE_INT); 213 extern bool mips_legitimize_move (machine_mode, rtx, rtx); 214 215 extern rtx mips_subword (rtx, bool); 216 extern bool mips_split_move_p (rtx, rtx, enum mips_split_type); 217 extern void mips_split_move (rtx, rtx, enum mips_split_type, rtx); 218 extern bool mips_split_move_insn_p (rtx, rtx, rtx); 219 extern void mips_split_move_insn (rtx, rtx, rtx); 220 extern void mips_split_128bit_move (rtx, rtx); 221 extern bool mips_split_128bit_move_p (rtx, rtx); 222 extern void mips_split_msa_copy_d (rtx, rtx, rtx, rtx (*)(rtx, rtx, rtx)); 223 extern void mips_split_msa_insert_d (rtx, rtx, rtx, rtx); 224 extern void mips_split_msa_fill_d (rtx, rtx); 225 extern const char *mips_output_move (rtx, rtx); 226 extern bool mips_cfun_has_cprestore_slot_p (void); 227 extern bool mips_cprestore_address_p (rtx, bool); 228 extern void mips_save_gp_to_cprestore_slot (rtx, rtx, rtx, rtx); 229 extern void mips_restore_gp_from_cprestore_slot (rtx); 230 #ifdef RTX_CODE 231 extern void mips_expand_scc (rtx *); 232 extern void mips_expand_conditional_branch (rtx *); 233 extern void mips_expand_vcondv2sf (rtx, rtx, rtx, enum rtx_code, rtx, rtx); 234 extern void mips_expand_conditional_move (rtx *); 235 extern void mips_expand_conditional_trap (rtx); 236 #endif 237 extern bool mips_use_pic_fn_addr_reg_p (const_rtx); 238 extern rtx_insn *mips_expand_call (enum mips_call_type, rtx, rtx, rtx, rtx, 239 bool); 240 extern void mips_split_call (rtx, rtx); 241 extern bool mips_get_pic_call_symbol (rtx *, int); 242 extern void mips_set_return_address (rtx, rtx); 243 extern bool mips_move_by_pieces_p (unsigned HOST_WIDE_INT, unsigned int); 244 extern bool mips_store_by_pieces_p (unsigned HOST_WIDE_INT, unsigned int); 245 extern bool mips_expand_block_move (rtx, rtx, rtx); 246 extern void mips_expand_synci_loop (rtx, rtx); 247 248 extern void mips_init_cumulative_args (CUMULATIVE_ARGS *, tree); 249 extern bool mips_pad_reg_upward (machine_mode, tree); 250 251 extern bool mips_expand_ext_as_unaligned_load (rtx, rtx, HOST_WIDE_INT, 252 HOST_WIDE_INT, bool); 253 extern bool mips_expand_ins_as_unaligned_store (rtx, rtx, HOST_WIDE_INT, 254 HOST_WIDE_INT); 255 extern bool mips_mem_fits_mode_p (machine_mode mode, rtx x); 256 extern HOST_WIDE_INT mips_debugger_offset (rtx, HOST_WIDE_INT); 257 258 extern void mips_push_asm_switch (struct mips_asm_switch *); 259 extern void mips_pop_asm_switch (struct mips_asm_switch *); 260 extern void mips_output_external (FILE *, tree, const char *); 261 extern void mips_output_ascii (FILE *, const char *, size_t); 262 extern const char *mips_output_tls_reloc_directive (rtx *); 263 extern void mips_output_aligned_decl_common (FILE *, tree, const char *, 264 unsigned HOST_WIDE_INT, 265 unsigned int); 266 extern void mips_declare_common_object (FILE *, const char *, 267 const char *, unsigned HOST_WIDE_INT, 268 unsigned int, bool); 269 extern void mips_declare_object (FILE *, const char *, const char *, 270 const char *, ...) ATTRIBUTE_PRINTF_4; 271 extern void mips_declare_object_name (FILE *, const char *, tree); 272 extern void mips_finish_declare_object (FILE *, tree, int, int); 273 extern void mips_set_text_contents_type (FILE *, const char *, 274 unsigned long, bool); 275 276 extern bool mips_small_data_pattern_p (rtx); 277 extern rtx mips_rewrite_small_data (rtx); 278 extern HOST_WIDE_INT mips_initial_elimination_offset (int, int); 279 extern rtx mips_return_addr (int, rtx); 280 extern bool mips_must_initialize_gp_p (void); 281 extern enum mips_loadgp_style mips_current_loadgp_style (void); 282 extern void mips_emit_save_slot_move (rtx, rtx, rtx); 283 extern void mips_expand_prologue (void); 284 extern void mips_expand_before_return (void); 285 extern void mips_expand_epilogue (bool); 286 extern bool mips_can_use_return_insn (void); 287 288 extern bool mips_const_vector_same_val_p (rtx, machine_mode); 289 extern bool mips_const_vector_same_bytes_p (rtx, machine_mode); 290 extern bool mips_const_vector_same_int_p (rtx, machine_mode, HOST_WIDE_INT, 291 HOST_WIDE_INT); 292 extern bool mips_const_vector_shuffle_set_p (rtx, machine_mode); 293 extern bool mips_const_vector_bitimm_set_p (rtx, machine_mode); 294 extern bool mips_const_vector_bitimm_clr_p (rtx, machine_mode); 295 extern rtx mips_msa_vec_parallel_const_half (machine_mode, bool); 296 extern rtx mips_gen_const_int_vector (machine_mode, HOST_WIDE_INT); 297 extern bool mips_dangerous_for_la25_p (rtx); 298 extern enum reg_class mips_secondary_reload_class (enum reg_class, 299 machine_mode, 300 rtx, bool); 301 extern int mips_class_max_nregs (enum reg_class, machine_mode); 302 303 extern machine_mode mips_hard_regno_caller_save_mode (unsigned int, 304 unsigned int, 305 machine_mode); 306 extern int mips_adjust_insn_length (rtx_insn *, int); 307 extern void mips_output_load_label (rtx); 308 extern const char *mips_output_conditional_branch (rtx_insn *, rtx *, 309 const char *, const char *); 310 extern const char *mips_output_order_conditional_branch (rtx_insn *, rtx *, 311 bool); 312 extern const char *mips_output_equal_conditional_branch (rtx_insn *, rtx *, 313 bool); 314 extern const char *mips_output_jump (rtx *, int, int, bool); 315 extern const char *mips_output_sync (void); 316 extern const char *mips_output_sync_loop (rtx_insn *, rtx *); 317 extern unsigned int mips_sync_loop_insns (rtx_insn *, rtx *); 318 extern const char *mips_output_division (const char *, rtx *); 319 extern const char *mips_msa_output_division (const char *, rtx *); 320 extern const char *mips_output_probe_stack_range (rtx, rtx); 321 extern bool mips_hard_regno_rename_ok (unsigned int, unsigned int); 322 extern bool mips_linked_madd_p (rtx_insn *, rtx_insn *); 323 extern bool mips_store_data_bypass_p (rtx_insn *, rtx_insn *); 324 extern int mips_dspalu_bypass_p (rtx, rtx); 325 extern rtx mips_prefetch_cookie (rtx, rtx); 326 extern rtx mips_loongson_ext2_prefetch_cookie (rtx, rtx); 327 328 extern const char *current_section_name (void); 329 extern unsigned int current_section_flags (void); 330 extern bool mips_use_ins_ext_p (rtx, HOST_WIDE_INT, HOST_WIDE_INT); 331 332 extern const char *mips16e_output_save_restore (rtx, HOST_WIDE_INT); 333 extern bool mips16e_save_restore_pattern_p (rtx, HOST_WIDE_INT, 334 struct mips16e_save_restore_info *); 335 336 extern bool mask_low_and_shift_p (machine_mode, rtx, rtx, int); 337 extern int mask_low_and_shift_len (machine_mode, rtx, rtx); 338 extern bool and_operands_ok (machine_mode, rtx, rtx); 339 extern bool mips_fmadd_bypass (rtx_insn *, rtx_insn *); 340 341 union mips_gen_fn_ptrs 342 { 343 rtx (*fn_6) (rtx, rtx, rtx, rtx, rtx, rtx); 344 rtx (*fn_5) (rtx, rtx, rtx, rtx, rtx); 345 rtx (*fn_4) (rtx, rtx, rtx, rtx); 346 }; 347 348 extern void mips_expand_atomic_qihi (union mips_gen_fn_ptrs, 349 rtx, rtx, rtx, rtx); 350 351 extern void mips_expand_vector_init (rtx, rtx); 352 extern void mips_expand_vec_unpack (rtx op[2], bool, bool); 353 extern void mips_expand_vec_reduc (rtx, rtx, rtx (*)(rtx, rtx, rtx)); 354 extern void mips_expand_vec_minmax (rtx, rtx, rtx, 355 rtx (*) (rtx, rtx, rtx), bool); 356 357 extern int mips_ldst_scaled_shift (machine_mode); 358 extern bool mips_signed_immediate_p (unsigned HOST_WIDE_INT, int, int); 359 extern bool mips_unsigned_immediate_p (unsigned HOST_WIDE_INT, int, int); 360 extern const char *umips_output_save_restore (bool, rtx); 361 extern bool umips_save_restore_pattern_p (bool, rtx); 362 extern bool umips_load_store_pair_p (bool, rtx *); 363 extern void umips_output_load_store_pair (bool, rtx *); 364 extern bool umips_movep_target_p (rtx, rtx); 365 extern bool umips_12bit_offset_address_p (rtx, machine_mode); 366 extern bool mips_9bit_offset_address_p (rtx, machine_mode); 367 extern bool lwsp_swsp_address_p (rtx, machine_mode); 368 extern bool m16_based_address_p (rtx, machine_mode, 369 int (*)(rtx_def*, machine_mode)); 370 extern rtx mips_expand_thread_pointer (rtx); 371 extern void mips16_expand_get_fcsr (rtx); 372 extern void mips16_expand_set_fcsr (rtx); 373 374 extern bool mips_eh_uses (unsigned int); 375 extern bool mips_epilogue_uses (unsigned int); 376 extern void mips_final_prescan_insn (rtx_insn *, rtx *, int); 377 extern int mips_trampoline_code_size (void); 378 extern void mips_function_profiler (FILE *); 379 extern bool mips_load_store_bonding_p (rtx *, machine_mode, bool); 380 381 typedef rtx (*mulsidi3_gen_fn) (rtx, rtx, rtx); 382 #ifdef RTX_CODE 383 extern mulsidi3_gen_fn mips_mulsidi3_gen_fn (enum rtx_code); 384 #endif 385 386 extern void mips_register_frame_header_opt (void); 387 extern void mips_expand_vec_cond_expr (machine_mode, machine_mode, rtx *); 388 389 /* Routines implemented in mips-d.c */ 390 extern void mips_d_target_versions (void); 391 392 #endif /* ! GCC_MIPS_PROTOS_H */ 393