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Turn CANNOT_CHANGE_MODE_CLASS into a hook
[thirdparty/gcc.git] / gcc / config / mips / mips-protos.h
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9721bc37 1/* Prototypes of target machine for GNU compiler. MIPS version.
aad93da1 2 Copyright (C) 1989-2017 Free Software Foundation, Inc.
9721bc37 3 Contributed by A. Lichnewsky (lich@inria.inria.fr).
4 Changed by Michael Meissner (meissner@osf.org).
c910419d 5 64-bit r4000 support by Ian Lance Taylor (ian@cygnus.com) and
9721bc37 6 Brendan Eich (brendan@microunity.com).
7
187b36cf 8This file is part of GCC.
9721bc37 9
187b36cf 10GCC is free software; you can redistribute it and/or modify
9721bc37 11it under the terms of the GNU General Public License as published by
038d1e19 12the Free Software Foundation; either version 3, or (at your option)
9721bc37 13any later version.
14
187b36cf 15GCC is distributed in the hope that it will be useful,
9721bc37 16but WITHOUT ANY WARRANTY; without even the implied warranty of
17MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18GNU General Public License for more details.
19
20You should have received a copy of the GNU General Public License
038d1e19 21along with GCC; see the file COPYING3. If not see
22<http://www.gnu.org/licenses/>. */
9721bc37 23
2a281353 24#ifndef GCC_MIPS_PROTOS_H
25#define GCC_MIPS_PROTOS_H
9721bc37 26
5039caa5 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. */
37enum mips_symbol_context {
38 SYMBOL_CONTEXT_CALL,
39 SYMBOL_CONTEXT_LEA,
40 SYMBOL_CONTEXT_MEM
41};
42
13bd6836 43/* Classifies a SYMBOL_REF, LABEL_REF or UNSPEC address.
44
a738b930 45 SYMBOL_ABSOLUTE
46 The symbol's value will be calculated using absolute relocations,
47 such as %hi and %lo.
13bd6836 48
a738b930 49 SYMBOL_GP_RELATIVE
50 The symbol's value will be calculated by adding a 16-bit offset
51 from $gp.
13bd6836 52
a738b930 53 SYMBOL_PC_RELATIVE
54 The symbol's value will be calculated using a MIPS16 PC-relative
55 calculation.
13bd6836 56
4cb04729 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.
13bd6836 60
4cb04729 61 SYMBOL_GOT_DISP
62 The symbol's value will be loaded directly from the GOT.
13bd6836 63
64 SYMBOL_GOTOFF_PAGE
4cb04729 65 An UNSPEC wrapper around a SYMBOL_GOT_PAGE_OFST. It represents the
66 offset from _gp of the GOT entry.
13bd6836 67
4cb04729 68 SYMBOL_GOTOFF_DISP
69 An UNSPEC wrapper around a SYMBOL_GOT_DISP. It represents the
851d9296 70 offset from _gp of the symbol's GOT entry.
13bd6836 71
72 SYMBOL_GOTOFF_CALL
4cb04729 73 Like SYMBOL_GOTOFF_DISP, but used when calling a global function.
13bd6836 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
42bdde4b 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
13bd6836 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
a8a393cb 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. */
13bd6836 107enum mips_symbol_type {
a738b930 108 SYMBOL_ABSOLUTE,
109 SYMBOL_GP_RELATIVE,
110 SYMBOL_PC_RELATIVE,
4cb04729 111 SYMBOL_GOT_PAGE_OFST,
112 SYMBOL_GOT_DISP,
13bd6836 113 SYMBOL_GOTOFF_PAGE,
4cb04729 114 SYMBOL_GOTOFF_DISP,
13bd6836 115 SYMBOL_GOTOFF_CALL,
116 SYMBOL_GOTOFF_LOADGP,
42bdde4b 117 SYMBOL_TLS,
118 SYMBOL_TLSGD,
119 SYMBOL_TLSLDM,
120 SYMBOL_DTPREL,
121 SYMBOL_GOTTPREL,
122 SYMBOL_TPREL,
13bd6836 123 SYMBOL_64_HIGH,
124 SYMBOL_64_MID,
a8a393cb 125 SYMBOL_64_LOW,
126 SYMBOL_HALF
13bd6836 127};
a8a393cb 128#define NUM_SYMBOL_TYPES (SYMBOL_HALF + 1)
13bd6836 129
1b6b10a9 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
a8a393cb 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. */
1b6b10a9 148enum mips_loadgp_style {
149 LOADGP_NONE,
150 LOADGP_OLDABI,
151 LOADGP_NEWABI,
a8a393cb 152 LOADGP_ABSOLUTE,
153 LOADGP_RTP
1b6b10a9 154};
155
0e13e859 156struct mips16e_save_restore_info;
157
559b0712 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. */
168enum mips_call_type {
169 MIPS_CALL_NORMAL,
170 MIPS_CALL_SIBCALL,
171 MIPS_CALL_EPILOGUE
172};
173
39b73e50 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. */
187enum mips_split_type {
188 SPLIT_IF_NECESSARY,
189 SPLIT_FOR_SPEED,
190 SPLIT_FOR_SIZE
191};
192
5039caa5 193extern bool mips_symbolic_constant_p (rtx, enum mips_symbol_context,
194 enum mips_symbol_type *);
3754d046 195extern int mips_regno_mode_ok_for_base_p (int, machine_mode, bool);
196extern bool mips_stack_address_p (rtx, machine_mode);
197extern int mips_address_insns (rtx, machine_mode, bool);
f05dc279 198extern int mips_const_insns (rtx);
58cdf9da 199extern int mips_split_const_insns (rtx);
ddc6405a 200extern int mips_split_128bit_const_insns (rtx);
50fc2d35 201extern int mips_load_store_insns (rtx, rtx_insn *);
ddc6405a 202extern int mips_idiv_insns (machine_mode);
c472e2a3 203extern rtx_insn *mips_emit_move (rtx, rtx);
a4cfded4 204#ifdef RTX_CODE
205extern void mips_emit_binary (enum rtx_code, rtx, rtx, rtx);
206#endif
559b0712 207extern rtx mips_pic_base_register (rtx);
208extern rtx mips_got_load (rtx, rtx, enum mips_symbol_type);
3754d046 209extern bool mips_split_symbol (rtx, rtx, machine_mode, rtx *);
13bd6836 210extern rtx mips_unspec_address (rtx, enum mips_symbol_type);
9d651ea6 211extern rtx mips_strip_unspec_address (rtx);
1a4d3221 212extern void mips_move_integer (rtx, rtx, unsigned HOST_WIDE_INT);
3754d046 213extern bool mips_legitimize_move (machine_mode, rtx, rtx);
f05dc279 214
a798da4d 215extern rtx mips_subword (rtx, bool);
39b73e50 216extern bool mips_split_move_p (rtx, rtx, enum mips_split_type);
217extern void mips_split_move (rtx, rtx, enum mips_split_type);
218extern bool mips_split_move_insn_p (rtx, rtx, rtx);
219extern void mips_split_move_insn (rtx, rtx, rtx);
ddc6405a 220extern void mips_split_128bit_move (rtx, rtx);
221extern bool mips_split_128bit_move_p (rtx, rtx);
222extern void mips_split_msa_copy_d (rtx, rtx, rtx, rtx (*)(rtx, rtx, rtx));
223extern void mips_split_msa_insert_d (rtx, rtx, rtx, rtx);
224extern void mips_split_msa_fill_d (rtx, rtx);
f05dc279 225extern const char *mips_output_move (rtx, rtx);
74facf6e 226extern bool mips_cfun_has_cprestore_slot_p (void);
227extern bool mips_cprestore_address_p (rtx, bool);
228extern void mips_save_gp_to_cprestore_slot (rtx, rtx, rtx, rtx);
229extern void mips_restore_gp_from_cprestore_slot (rtx);
1b7a12b9 230#ifdef RTX_CODE
74f4459c 231extern void mips_expand_scc (rtx *);
232extern void mips_expand_conditional_branch (rtx *);
1ad3c870 233extern void mips_expand_vcondv2sf (rtx, rtx, rtx, enum rtx_code, rtx, rtx);
a798da4d 234extern void mips_expand_conditional_move (rtx *);
74f4459c 235extern void mips_expand_conditional_trap (rtx);
1b7a12b9 236#endif
559b0712 237extern bool mips_use_pic_fn_addr_reg_p (const_rtx);
c472e2a3 238extern rtx_insn *mips_expand_call (enum mips_call_type, rtx, rtx, rtx, rtx,
239 bool);
559b0712 240extern void mips_split_call (rtx, rtx);
ca30e0b9 241extern bool mips_get_pic_call_symbol (rtx *, int);
f05dc279 242extern void mips_set_return_address (rtx, rtx);
8136e769 243extern bool mips_move_by_pieces_p (unsigned HOST_WIDE_INT, unsigned int);
244extern bool mips_store_by_pieces_p (unsigned HOST_WIDE_INT, unsigned int);
f05dc279 245extern bool mips_expand_block_move (rtx, rtx, rtx);
381be270 246extern void mips_expand_synci_loop (rtx, rtx);
f05dc279 247
a798da4d 248extern void mips_init_cumulative_args (CUMULATIVE_ARGS *, tree);
3754d046 249extern bool mips_pad_reg_upward (machine_mode, tree);
f05dc279 250
a798da4d 251extern bool mips_expand_ext_as_unaligned_load (rtx, rtx, HOST_WIDE_INT,
7378b7dc 252 HOST_WIDE_INT, bool);
a798da4d 253extern bool mips_expand_ins_as_unaligned_store (rtx, rtx, HOST_WIDE_INT,
254 HOST_WIDE_INT);
3754d046 255extern bool mips_mem_fits_mode_p (machine_mode mode, rtx x);
f05dc279 256extern HOST_WIDE_INT mips_debugger_offset (rtx, HOST_WIDE_INT);
257
0a54d56a 258extern void mips_push_asm_switch (struct mips_asm_switch *);
259extern void mips_pop_asm_switch (struct mips_asm_switch *);
34967002 260extern void mips_output_external (FILE *, tree, const char *);
a798da4d 261extern void mips_output_ascii (FILE *, const char *, size_t);
a657080a 262extern const char *mips_output_tls_reloc_directive (rtx *);
31b5e645 263extern void mips_output_aligned_decl_common (FILE *, tree, const char *,
264 unsigned HOST_WIDE_INT,
265 unsigned int);
97a4eb3d 266extern void mips_declare_common_object (FILE *, const char *,
267 const char *, unsigned HOST_WIDE_INT,
268 unsigned int, bool);
f05dc279 269extern void mips_declare_object (FILE *, const char *, const char *,
e2a91ff6 270 const char *, ...) ATTRIBUTE_PRINTF_4;
f05dc279 271extern void mips_declare_object_name (FILE *, const char *, tree);
272extern void mips_finish_declare_object (FILE *, tree, int, int);
35293eb1 273extern void mips_set_text_contents_type (FILE *, const char *,
274 unsigned long, bool);
f05dc279 275
2fbff099 276extern bool mips_small_data_pattern_p (rtx);
da484573 277extern rtx mips_rewrite_small_data (rtx);
a1d0a190 278extern HOST_WIDE_INT mips_initial_elimination_offset (int, int);
f05dc279 279extern rtx mips_return_addr (int, rtx);
74facf6e 280extern bool mips_must_initialize_gp_p (void);
1b6b10a9 281extern enum mips_loadgp_style mips_current_loadgp_style (void);
74facf6e 282extern void mips_emit_save_slot_move (rtx, rtx, rtx);
f05dc279 283extern void mips_expand_prologue (void);
250b65e6 284extern void mips_expand_before_return (void);
a798da4d 285extern void mips_expand_epilogue (bool);
286extern bool mips_can_use_return_insn (void);
f05dc279 287
ddc6405a 288extern bool mips_const_vector_same_val_p (rtx, machine_mode);
289extern bool mips_const_vector_same_bytes_p (rtx, machine_mode);
290extern bool mips_const_vector_same_int_p (rtx, machine_mode, HOST_WIDE_INT,
291 HOST_WIDE_INT);
292extern bool mips_const_vector_shuffle_set_p (rtx, machine_mode);
293extern bool mips_const_vector_bitimm_set_p (rtx, machine_mode);
294extern bool mips_const_vector_bitimm_clr_p (rtx, machine_mode);
295extern rtx mips_msa_vec_parallel_const_half (machine_mode, bool);
58fb6709 296extern rtx mips_gen_const_int_vector (machine_mode, HOST_WIDE_INT);
fa70e739 297extern bool mips_dangerous_for_la25_p (rtx);
f05dc279 298extern enum reg_class mips_secondary_reload_class (enum reg_class,
3754d046 299 machine_mode,
a798da4d 300 rtx, bool);
3754d046 301extern int mips_class_max_nregs (enum reg_class, machine_mode);
f05dc279 302
f2b55aea 303extern machine_mode mips_hard_regno_caller_save_mode (unsigned int,
304 unsigned int,
305 machine_mode);
c472e2a3 306extern int mips_adjust_insn_length (rtx_insn *, int);
74facf6e 307extern void mips_output_load_label (rtx);
c472e2a3 308extern const char *mips_output_conditional_branch (rtx_insn *, rtx *,
309 const char *, const char *);
310extern const char *mips_output_order_conditional_branch (rtx_insn *, rtx *,
311 bool);
59449ca9 312extern const char *mips_output_equal_conditional_branch (rtx_insn *, rtx *,
313 bool);
314extern const char *mips_output_jump (rtx *, int, int, bool);
b47517ea 315extern const char *mips_output_sync (void);
d3ffa7b4 316extern const char *mips_output_sync_loop (rtx_insn *, rtx *);
317extern unsigned int mips_sync_loop_insns (rtx_insn *, rtx *);
f05dc279 318extern const char *mips_output_division (const char *, rtx *);
ddc6405a 319extern const char *mips_msa_output_division (const char *, rtx *);
51ad9863 320extern const char *mips_output_probe_stack_range (rtx, rtx);
35ed5ce3 321extern bool mips_hard_regno_rename_ok (unsigned int, unsigned int);
ed3e6e5d 322extern bool mips_linked_madd_p (rtx_insn *, rtx_insn *);
50fc2d35 323extern bool mips_store_data_bypass_p (rtx_insn *, rtx_insn *);
d4566465 324extern int mips_dspalu_bypass_p (rtx, rtx);
f61e0070 325extern rtx mips_prefetch_cookie (rtx, rtx);
f05dc279 326
f05dc279 327extern const char *current_section_name (void);
328extern unsigned int current_section_flags (void);
a798da4d 329extern bool mips_use_ins_ext_p (rtx, HOST_WIDE_INT, HOST_WIDE_INT);
9721bc37 330
0e13e859 331extern const char *mips16e_output_save_restore (rtx, HOST_WIDE_INT);
332extern bool mips16e_save_restore_pattern_p (rtx, HOST_WIDE_INT,
333 struct mips16e_save_restore_info *);
04877dac 334
3754d046 335extern bool mask_low_and_shift_p (machine_mode, rtx, rtx, int);
336extern int mask_low_and_shift_len (machine_mode, rtx, rtx);
337extern bool and_operands_ok (machine_mode, rtx, rtx);
ed3e6e5d 338extern bool mips_fmadd_bypass (rtx_insn *, rtx_insn *);
04877dac 339
3499ff60 340union mips_gen_fn_ptrs
341{
342 rtx (*fn_6) (rtx, rtx, rtx, rtx, rtx, rtx);
343 rtx (*fn_5) (rtx, rtx, rtx, rtx, rtx);
344 rtx (*fn_4) (rtx, rtx, rtx, rtx);
345};
346
347extern void mips_expand_atomic_qihi (union mips_gen_fn_ptrs,
348 rtx, rtx, rtx, rtx);
0e13e859 349
9636921b 350extern void mips_expand_vector_init (rtx, rtx);
54e21214 351extern bool mips_expand_vec_perm_const (rtx op[4]);
352extern void mips_expand_vec_unpack (rtx op[2], bool, bool);
353extern void mips_expand_vec_reduc (rtx, rtx, rtx (*)(rtx, rtx, rtx));
354extern void mips_expand_vec_minmax (rtx, rtx, rtx,
355 rtx (*) (rtx, rtx, rtx), bool);
9636921b 356
ddc6405a 357extern int mips_ldst_scaled_shift (machine_mode);
087a99ba 358extern bool mips_signed_immediate_p (unsigned HOST_WIDE_INT, int, int);
359extern bool mips_unsigned_immediate_p (unsigned HOST_WIDE_INT, int, int);
ff9c1bc1 360extern const char *umips_output_save_restore (bool, rtx);
361extern bool umips_save_restore_pattern_p (bool, rtx);
362extern bool umips_load_store_pair_p (bool, rtx *);
363extern void umips_output_load_store_pair (bool, rtx *);
364extern bool umips_movep_target_p (rtx, rtx);
3754d046 365extern bool umips_12bit_offset_address_p (rtx, machine_mode);
78645e70 366extern bool mips_9bit_offset_address_p (rtx, machine_mode);
3754d046 367extern bool lwsp_swsp_address_p (rtx, machine_mode);
368extern bool m16_based_address_p (rtx, machine_mode,
087a99ba 369 int (*)(rtx_def*, machine_mode));
badaa04c 370extern rtx mips_expand_thread_pointer (rtx);
9641080c 371extern void mips16_expand_get_fcsr (rtx);
372extern void mips16_expand_set_fcsr (rtx);
badaa04c 373
74facf6e 374extern bool mips_eh_uses (unsigned int);
0bfaf4c4 375extern bool mips_epilogue_uses (unsigned int);
c472e2a3 376extern void mips_final_prescan_insn (rtx_insn *, rtx *, int);
eb725716 377extern int mips_trampoline_code_size (void);
57bb39d9 378extern void mips_function_profiler (FILE *);
069b9d52 379extern bool mips_load_store_bonding_p (rtx *, machine_mode, bool);
0bfaf4c4 380
8b0045f2 381typedef rtx (*mulsidi3_gen_fn) (rtx, rtx, rtx);
382#ifdef RTX_CODE
383extern mulsidi3_gen_fn mips_mulsidi3_gen_fn (enum rtx_code);
384#endif
385
0c9081e8 386extern void mips_register_frame_header_opt (void);
ddc6405a 387extern void mips_expand_vec_cond_expr (machine_mode, machine_mode, rtx *);
0c9081e8 388
2a281353 389#endif /* ! GCC_MIPS_PROTOS_H */
Mirror of https://gcc.gnu.org/git/gcc.git