1 /* Prototypes for exported functions defined in arm.c and pe.c 2 Copyright (C) 1999-2017 Free Software Foundation, Inc. 3 Contributed by Richard Earnshaw (rearnsha@arm.com) 4 Minor hacks by Nick Clifton (nickc@cygnus.com) 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 #ifndef GCC_ARM_PROTOS_H 23 #define GCC_ARM_PROTOS_H 24 25 #include "sbitmap.h" 26 27 extern enum unwind_info_type arm_except_unwind_info (struct gcc_options *); 28 extern int use_return_insn (int, rtx); 29 extern bool use_simple_return_p (void); 30 extern enum reg_class arm_regno_class (int); 31 extern void arm_load_pic_register (unsigned long); 32 extern int arm_volatile_func (void); 33 extern void arm_expand_prologue (void); 34 extern void arm_expand_epilogue (bool); 35 extern void arm_declare_function_name (FILE *, const char *, tree); 36 extern void arm_asm_declare_function_name (FILE *, const char *, tree); 37 extern void thumb2_expand_return (bool); 38 extern const char *arm_strip_name_encoding (const char *); 39 extern void arm_asm_output_labelref (FILE *, const char *); 40 extern void thumb2_asm_output_opcode (FILE *); 41 extern unsigned long arm_current_func_type (void); 42 extern HOST_WIDE_INT arm_compute_initial_elimination_offset (unsigned int, 43 unsigned int); 44 extern HOST_WIDE_INT thumb_compute_initial_elimination_offset (unsigned int, 45 unsigned int); 46 extern unsigned int arm_dbx_register_number (unsigned int); 47 extern void arm_output_fn_unwind (FILE *, bool); 48 49 extern rtx arm_expand_builtin (tree exp, rtx target, rtx subtarget 50 ATTRIBUTE_UNUSED, enum machine_mode mode 51 ATTRIBUTE_UNUSED, int ignore ATTRIBUTE_UNUSED); 52 extern tree arm_builtin_decl (unsigned code, bool initialize_p 53 ATTRIBUTE_UNUSED); 54 extern void arm_init_builtins (void); 55 extern void arm_atomic_assign_expand_fenv (tree *hold, tree *clear, tree *update); 56 extern rtx arm_simd_vect_par_cnst_half (machine_mode mode, bool high); 57 extern bool arm_simd_check_vect_par_cnst_half_p (rtx op, machine_mode mode, 58 bool high); 59 #ifdef RTX_CODE 60 extern void arm_gen_unlikely_cbranch (enum rtx_code, machine_mode cc_mode, 61 rtx label_ref); 62 extern bool arm_vector_mode_supported_p (machine_mode); 63 extern bool arm_small_register_classes_for_mode_p (machine_mode); 64 extern int arm_hard_regno_mode_ok (unsigned int, machine_mode); 65 extern bool arm_modes_tieable_p (machine_mode, machine_mode); 66 extern int const_ok_for_arm (HOST_WIDE_INT); 67 extern int const_ok_for_op (HOST_WIDE_INT, enum rtx_code); 68 extern int const_ok_for_dimode_op (HOST_WIDE_INT, enum rtx_code); 69 extern int arm_split_constant (RTX_CODE, machine_mode, rtx, 70 HOST_WIDE_INT, rtx, rtx, int); 71 extern int legitimate_pic_operand_p (rtx); 72 extern rtx legitimize_pic_address (rtx, machine_mode, rtx); 73 extern rtx legitimize_tls_address (rtx, rtx); 74 extern bool arm_legitimate_address_p (machine_mode, rtx, bool); 75 extern int arm_legitimate_address_outer_p (machine_mode, rtx, RTX_CODE, int); 76 extern int thumb_legitimate_offset_p (machine_mode, HOST_WIDE_INT); 77 extern int thumb1_legitimate_address_p (machine_mode, rtx, int); 78 extern bool ldm_stm_operation_p (rtx, bool, machine_mode mode, 79 bool, bool); 80 extern int arm_const_double_rtx (rtx); 81 extern int vfp3_const_double_rtx (rtx); 82 extern int neon_immediate_valid_for_move (rtx, machine_mode, rtx *, int *); 83 extern int neon_immediate_valid_for_logic (rtx, machine_mode, int, rtx *, 84 int *); 85 extern int neon_immediate_valid_for_shift (rtx, machine_mode, rtx *, 86 int *, bool); 87 extern char *neon_output_logic_immediate (const char *, rtx *, 88 machine_mode, int, int); 89 extern char *neon_output_shift_immediate (const char *, char, rtx *, 90 machine_mode, int, bool); 91 extern void neon_pairwise_reduce (rtx, rtx, machine_mode, 92 rtx (*) (rtx, rtx, rtx)); 93 extern rtx neon_make_constant (rtx); 94 extern tree arm_builtin_vectorized_function (unsigned int, tree, tree); 95 extern void neon_expand_vector_init (rtx, rtx); 96 extern void neon_lane_bounds (rtx, HOST_WIDE_INT, HOST_WIDE_INT, const_tree); 97 extern void arm_const_bounds (rtx, HOST_WIDE_INT, HOST_WIDE_INT); 98 extern HOST_WIDE_INT neon_element_bits (machine_mode); 99 extern void neon_emit_pair_result_insn (machine_mode, 100 rtx (*) (rtx, rtx, rtx, rtx), 101 rtx, rtx, rtx); 102 extern void neon_disambiguate_copy (rtx *, rtx *, rtx *, unsigned int); 103 extern void neon_split_vcombine (rtx op[3]); 104 extern enum reg_class coproc_secondary_reload_class (machine_mode, rtx, 105 bool); 106 extern bool arm_tls_referenced_p (rtx); 107 108 extern int arm_coproc_mem_operand (rtx, bool); 109 extern int neon_vector_mem_operand (rtx, int, bool); 110 extern int neon_struct_mem_operand (rtx); 111 112 extern int tls_mentioned_p (rtx); 113 extern int symbol_mentioned_p (rtx); 114 extern int label_mentioned_p (rtx); 115 extern RTX_CODE minmax_code (rtx); 116 extern bool arm_sat_operator_match (rtx, rtx, int *, bool *); 117 extern int adjacent_mem_locations (rtx, rtx); 118 extern bool gen_ldm_seq (rtx *, int, bool); 119 extern bool gen_stm_seq (rtx *, int); 120 extern bool gen_const_stm_seq (rtx *, int); 121 extern rtx arm_gen_load_multiple (int *, int, rtx, int, rtx, HOST_WIDE_INT *); 122 extern rtx arm_gen_store_multiple (int *, int, rtx, int, rtx, HOST_WIDE_INT *); 123 extern bool offset_ok_for_ldrd_strd (HOST_WIDE_INT); 124 extern bool operands_ok_ldrd_strd (rtx, rtx, rtx, HOST_WIDE_INT, bool, bool); 125 extern bool gen_operands_ldrd_strd (rtx *, bool, bool, bool); 126 extern int arm_gen_movmemqi (rtx *); 127 extern bool gen_movmem_ldrd_strd (rtx *); 128 extern machine_mode arm_select_cc_mode (RTX_CODE, rtx, rtx); 129 extern machine_mode arm_select_dominance_cc_mode (rtx, rtx, 130 HOST_WIDE_INT); 131 extern rtx arm_gen_compare_reg (RTX_CODE, rtx, rtx, rtx); 132 extern rtx arm_gen_return_addr_mask (void); 133 extern void arm_reload_in_hi (rtx *); 134 extern void arm_reload_out_hi (rtx *); 135 extern int arm_max_const_double_inline_cost (void); 136 extern int arm_const_double_inline_cost (rtx); 137 extern bool arm_const_double_by_parts (rtx); 138 extern bool arm_const_double_by_immediates (rtx); 139 extern void arm_emit_call_insn (rtx, rtx, bool); 140 bool detect_cmse_nonsecure_call (tree); 141 extern const char *output_call (rtx *); 142 void arm_emit_movpair (rtx, rtx); 143 extern const char *output_mov_long_double_arm_from_arm (rtx *); 144 extern const char *output_move_double (rtx *, bool, int *count); 145 extern const char *output_move_quad (rtx *); 146 extern int arm_count_output_move_double_insns (rtx *); 147 extern const char *output_move_vfp (rtx *operands); 148 extern const char *output_move_neon (rtx *operands); 149 extern int arm_attr_length_move_neon (rtx_insn *); 150 extern int arm_address_offset_is_imm (rtx_insn *); 151 extern const char *output_add_immediate (rtx *); 152 extern const char *arithmetic_instr (rtx, int); 153 extern void output_ascii_pseudo_op (FILE *, const unsigned char *, int); 154 extern const char *output_return_instruction (rtx, bool, bool, bool); 155 extern const char *output_probe_stack_range (rtx, rtx); 156 extern void arm_poke_function_name (FILE *, const char *); 157 extern void arm_final_prescan_insn (rtx_insn *); 158 extern int arm_debugger_arg_offset (int, rtx); 159 extern bool arm_is_long_call_p (tree); 160 extern int arm_emit_vector_const (FILE *, rtx); 161 extern void arm_emit_fp16_const (rtx c); 162 extern const char * arm_output_load_gr (rtx *); 163 extern const char *vfp_output_vstmd (rtx *); 164 extern void arm_output_multireg_pop (rtx *, bool, rtx, bool, bool); 165 extern void arm_set_return_address (rtx, rtx); 166 extern int arm_eliminable_register (rtx); 167 extern const char *arm_output_shift(rtx *, int); 168 extern const char *arm_output_iwmmxt_shift_immediate (const char *, rtx *, bool); 169 extern const char *arm_output_iwmmxt_tinsr (rtx *); 170 extern unsigned int arm_sync_loop_insns (rtx , rtx *); 171 extern int arm_attr_length_push_multi(rtx, rtx); 172 extern int arm_attr_length_pop_multi(rtx *, bool, bool); 173 extern void arm_expand_compare_and_swap (rtx op[]); 174 extern void arm_split_compare_and_swap (rtx op[]); 175 extern void arm_split_atomic_op (enum rtx_code, rtx, rtx, rtx, rtx, rtx, rtx); 176 extern rtx arm_load_tp (rtx); 177 extern bool arm_coproc_builtin_available (enum unspecv); 178 extern bool arm_coproc_ldc_stc_legitimate_address (rtx); 179 180 #if defined TREE_CODE 181 extern void arm_init_cumulative_args (CUMULATIVE_ARGS *, tree, rtx, tree); 182 extern bool arm_pad_arg_upward (machine_mode, const_tree); 183 extern bool arm_pad_reg_upward (machine_mode, tree, int); 184 #endif 185 extern int arm_apply_result_size (void); 186 187 #endif /* RTX_CODE */ 188 189 /* Thumb functions. */ 190 extern void arm_init_expanders (void); 191 extern const char *thumb1_unexpanded_epilogue (void); 192 extern void thumb1_expand_prologue (void); 193 extern void thumb1_expand_epilogue (void); 194 extern const char *thumb1_output_interwork (void); 195 extern int thumb_shiftable_const (unsigned HOST_WIDE_INT); 196 #ifdef RTX_CODE 197 extern enum arm_cond_code maybe_get_arm_condition_code (rtx); 198 extern void thumb1_final_prescan_insn (rtx_insn *); 199 extern void thumb2_final_prescan_insn (rtx_insn *); 200 extern const char *thumb_load_double_from_address (rtx *); 201 extern const char *thumb_output_move_mem_multiple (int, rtx *); 202 extern const char *thumb_call_via_reg (rtx); 203 extern void thumb_expand_movmemqi (rtx *); 204 extern rtx arm_return_addr (int, rtx); 205 extern void thumb_reload_out_hi (rtx *); 206 extern void thumb_set_return_address (rtx, rtx); 207 extern const char *thumb1_output_casesi (rtx *); 208 extern const char *thumb2_output_casesi (rtx *); 209 #endif 210 211 /* Defined in pe.c. */ 212 extern int arm_dllexport_name_p (const char *); 213 extern int arm_dllimport_name_p (const char *); 214 215 #ifdef TREE_CODE 216 extern void arm_pe_unique_section (tree, int); 217 extern void arm_pe_encode_section_info (tree, rtx, int); 218 extern int arm_dllexport_p (tree); 219 extern int arm_dllimport_p (tree); 220 extern void arm_mark_dllexport (tree); 221 extern void arm_mark_dllimport (tree); 222 extern bool arm_change_mode_p (tree); 223 #endif 224 225 extern tree arm_valid_target_attribute_tree (tree, struct gcc_options *, 226 struct gcc_options *); 227 extern void arm_configure_build_target (struct arm_build_target *, 228 struct cl_target_option *, 229 struct gcc_options *, bool); 230 extern void arm_pr_long_calls (struct cpp_reader *); 231 extern void arm_pr_no_long_calls (struct cpp_reader *); 232 extern void arm_pr_long_calls_off (struct cpp_reader *); 233 234 extern const char *arm_mangle_type (const_tree); 235 extern const char *arm_mangle_builtin_type (const_tree); 236 237 extern void arm_order_regs_for_local_alloc (void); 238 239 extern int arm_max_conditional_execute (); 240 241 /* Vectorizer cost model implementation. */ 242 struct cpu_vec_costs { 243 const int scalar_stmt_cost; /* Cost of any scalar operation, excluding 244 load and store. */ 245 const int scalar_load_cost; /* Cost of scalar load. */ 246 const int scalar_store_cost; /* Cost of scalar store. */ 247 const int vec_stmt_cost; /* Cost of any vector operation, excluding 248 load, store, vector-to-scalar and 249 scalar-to-vector operation. */ 250 const int vec_to_scalar_cost; /* Cost of vect-to-scalar operation. */ 251 const int scalar_to_vec_cost; /* Cost of scalar-to-vector operation. */ 252 const int vec_align_load_cost; /* Cost of aligned vector load. */ 253 const int vec_unalign_load_cost; /* Cost of unaligned vector load. */ 254 const int vec_unalign_store_cost; /* Cost of unaligned vector load. */ 255 const int vec_store_cost; /* Cost of vector store. */ 256 const int cond_taken_branch_cost; /* Cost of taken branch for vectorizer 257 cost model. */ 258 const int cond_not_taken_branch_cost;/* Cost of not taken branch for 259 vectorizer cost model. */ 260 }; 261 262 #ifdef RTX_CODE 263 /* This needs to be here because we need RTX_CODE and similar. */ 264 265 struct cpu_cost_table; 266 267 /* Dump function ARM_PRINT_TUNE_INFO should be updated whenever this 268 structure is modified. */ 269 270 struct tune_params 271 { 272 const struct cpu_cost_table *insn_extra_cost; 273 bool (*sched_adjust_cost) (rtx_insn *, int, rtx_insn *, int *); 274 int (*branch_cost) (bool, bool); 275 /* Vectorizer costs. */ 276 const struct cpu_vec_costs* vec_costs; 277 int constant_limit; 278 /* Maximum number of instructions to conditionalise. */ 279 int max_insns_skipped; 280 /* Maximum number of instructions to inline calls to memset. */ 281 int max_insns_inline_memset; 282 /* Issue rate of the processor. */ 283 unsigned int issue_rate; 284 /* Explicit prefetch data. */ 285 struct 286 { 287 int num_slots; 288 int l1_cache_size; 289 int l1_cache_line_size; 290 } prefetch; 291 enum {PREF_CONST_POOL_FALSE, PREF_CONST_POOL_TRUE} 292 prefer_constant_pool: 1; 293 /* Prefer STRD/LDRD instructions over PUSH/POP/LDM/STM. */ 294 enum {PREF_LDRD_FALSE, PREF_LDRD_TRUE} prefer_ldrd_strd: 1; 295 /* The preference for non short cirtcuit operation when optimizing for 296 performance. The first element covers Thumb state and the second one 297 is for ARM state. */ 298 enum log_op_non_short_circuit {LOG_OP_NON_SHORT_CIRCUIT_FALSE, 299 LOG_OP_NON_SHORT_CIRCUIT_TRUE}; 300 log_op_non_short_circuit logical_op_non_short_circuit_thumb: 1; 301 log_op_non_short_circuit logical_op_non_short_circuit_arm: 1; 302 /* Prefer 32-bit encoding instead of flag-setting 16-bit encoding. */ 303 enum {DISPARAGE_FLAGS_NEITHER, DISPARAGE_FLAGS_PARTIAL, DISPARAGE_FLAGS_ALL} 304 disparage_flag_setting_t16_encodings: 2; 305 enum {PREF_NEON_64_FALSE, PREF_NEON_64_TRUE} prefer_neon_for_64bits: 1; 306 /* Prefer to inline string operations like memset by using Neon. */ 307 enum {PREF_NEON_STRINGOPS_FALSE, PREF_NEON_STRINGOPS_TRUE} 308 string_ops_prefer_neon: 1; 309 /* Bitfield encoding the fusible pairs of instructions. Use FUSE_OPS 310 in an initializer if multiple fusion operations are supported on a 311 target. */ 312 enum fuse_ops 313 { 314 FUSE_NOTHING = 0, 315 FUSE_MOVW_MOVT = 1 << 0, 316 FUSE_AES_AESMC = 1 << 1 317 } fusible_ops: 2; 318 /* Depth of scheduling queue to check for L2 autoprefetcher. */ 319 enum {SCHED_AUTOPREF_OFF, SCHED_AUTOPREF_RANK, SCHED_AUTOPREF_FULL} 320 sched_autopref: 2; 321 }; 322 323 /* Smash multiple fusion operations into a type that can be used for an 324 initializer. */ 325 #define FUSE_OPS(x) ((tune_params::fuse_ops) (x)) 326 327 extern const struct tune_params *current_tune; 328 extern int vfp3_const_double_for_fract_bits (rtx); 329 /* return power of two from operand, otherwise 0. */ 330 extern int vfp3_const_double_for_bits (rtx); 331 332 extern void arm_emit_coreregs_64bit_shift (enum rtx_code, rtx, rtx, rtx, rtx, 333 rtx); 334 extern bool arm_fusion_enabled_p (tune_params::fuse_ops); 335 extern bool arm_valid_symbolic_address_p (rtx); 336 extern bool arm_validize_comparison (rtx *, rtx *, rtx *); 337 #endif /* RTX_CODE */ 338 339 extern bool arm_gen_setmem (rtx *); 340 extern void arm_expand_vec_perm (rtx target, rtx op0, rtx op1, rtx sel); 341 extern bool arm_expand_vec_perm_const (rtx target, rtx op0, rtx op1, rtx sel); 342 343 extern bool arm_autoinc_modes_ok_p (machine_mode, enum arm_auto_incmodes); 344 345 extern void arm_emit_eabi_attribute (const char *, int, int); 346 347 extern void arm_reset_previous_fndecl (void); 348 extern void save_restore_target_globals (tree); 349 350 /* Defined in gcc/common/config/arm-common.c. */ 351 extern const char *arm_rewrite_selected_cpu (const char *name); 352 353 /* Defined in gcc/common/config/arm-c.c. */ 354 extern void arm_lang_object_attributes_init (void); 355 extern void arm_register_target_pragmas (void); 356 extern void arm_cpu_cpp_builtins (struct cpp_reader *); 357 358 extern bool arm_is_constant_pool_ref (rtx); 359 360 /* The bits in this mask specify which instruction scheduling options should 361 be used. */ 362 extern unsigned int tune_flags; 363 364 /* Nonzero if this chip supports the ARM Architecture 3M extensions. */ 365 extern int arm_arch3m; 366 367 /* Nonzero if this chip supports the ARM Architecture 4 extensions. */ 368 extern int arm_arch4; 369 370 /* Nonzero if this chip supports the ARM Architecture 4t extensions. */ 371 extern int arm_arch4t; 372 373 /* Nonzero if this chip supports the ARM Architecture 5 extensions. */ 374 extern int arm_arch5; 375 376 /* Nonzero if this chip supports the ARM Architecture 5E extensions. */ 377 extern int arm_arch5e; 378 379 /* Nonzero if this chip supports the ARM Architecture 6 extensions. */ 380 extern int arm_arch6; 381 382 /* Nonzero if this chip supports the ARM 6K extensions. */ 383 extern int arm_arch6k; 384 385 /* Nonzero if this chip supports the ARM 6KZ extensions. */ 386 extern int arm_arch6kz; 387 388 /* Nonzero if instructions present in ARMv6-M can be used. */ 389 extern int arm_arch6m; 390 391 /* Nonzero if this chip supports the ARM 7 extensions. */ 392 extern int arm_arch7; 393 394 /* Nonzero if this chip supports the Large Physical Address Extension. */ 395 extern int arm_arch_lpae; 396 397 /* Nonzero if instructions not present in the 'M' profile can be used. */ 398 extern int arm_arch_notm; 399 400 /* Nonzero if instructions present in ARMv7E-M can be used. */ 401 extern int arm_arch7em; 402 403 /* Nonzero if instructions present in ARMv8 can be used. */ 404 extern int arm_arch8; 405 406 /* Nonzero if this chip can benefit from load scheduling. */ 407 extern int arm_ld_sched; 408 409 /* Nonzero if this chip is a StrongARM. */ 410 extern int arm_tune_strongarm; 411 412 /* Nonzero if this chip supports Intel Wireless MMX technology. */ 413 extern int arm_arch_iwmmxt; 414 415 /* Nonzero if this chip supports Intel Wireless MMX2 technology. */ 416 extern int arm_arch_iwmmxt2; 417 418 /* Nonzero if this chip is an XScale. */ 419 extern int arm_arch_xscale; 420 421 /* Nonzero if tuning for XScale */ 422 extern int arm_tune_xscale; 423 424 /* Nonzero if we want to tune for stores that access the write-buffer. 425 This typically means an ARM6 or ARM7 with MMU or MPU. */ 426 extern int arm_tune_wbuf; 427 428 /* Nonzero if tuning for Cortex-A9. */ 429 extern int arm_tune_cortex_a9; 430 431 /* Nonzero if we should define __THUMB_INTERWORK__ in the 432 preprocessor. 433 XXX This is a bit of a hack, it's intended to help work around 434 problems in GLD which doesn't understand that armv5t code is 435 interworking clean. */ 436 extern int arm_cpp_interwork; 437 438 /* Nonzero if chip supports Thumb 1. */ 439 extern int arm_arch_thumb1; 440 441 /* Nonzero if chip supports Thumb 2. */ 442 extern int arm_arch_thumb2; 443 444 /* Nonzero if chip supports integer division instruction. */ 445 extern int arm_arch_arm_hwdiv; 446 extern int arm_arch_thumb_hwdiv; 447 448 /* Nonzero if chip disallows volatile memory access in IT block. */ 449 extern int arm_arch_no_volatile_ce; 450 451 /* Nonzero if we should use Neon to handle 64-bits operations rather 452 than core registers. */ 453 extern int prefer_neon_for_64bits; 454 455 /* Structure defining the current overall architectural target and tuning. */ 456 struct arm_build_target 457 { 458 /* Name of the target CPU, if known, or NULL if the target CPU was not 459 specified by the user (and inferred from the -march option). */ 460 const char *core_name; 461 /* Name of the target ARCH. NULL if there is a selected CPU. */ 462 const char *arch_name; 463 /* Preprocessor substring (never NULL). */ 464 const char *arch_pp_name; 465 /* CPU identifier for the core we're compiling for (architecturally). */ 466 enum processor_type arch_core; 467 /* The base architecture value. */ 468 enum base_architecture base_arch; 469 /* Bitmap encapsulating the isa_bits for the target environment. */ 470 sbitmap isa; 471 /* Flags used for tuning. Long term, these move into tune_params. */ 472 unsigned int tune_flags; 473 /* Tables with more detailed tuning information. */ 474 const struct tune_params *tune; 475 /* CPU identifier for the tuning target. */ 476 enum processor_type tune_core; 477 }; 478 479 extern struct arm_build_target arm_active_target; 480 481 482 #endif /* ! GCC_ARM_PROTOS_H */ 483