1 /* Prototypes of target machine for GNU compiler. MIPS version.
2 Copyright (C) 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2001, 2002, 2003, 2004, 2005, 2007, 2008
4 Free Software Foundation, Inc.
5 Contributed by A. Lichnewsky (lich@inria.inria.fr).
6 Changed by Michael Meissner (meissner@osf.org).
7 64-bit r4000 support by Ian Lance Taylor (ian@cygnus.com) and
8 Brendan Eich (brendan@microunity.com).
10 This file is part of GCC.
12 GCC is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 3, or (at your option)
17 GCC is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with GCC; see the file COPYING3. If not see
24 <http://www.gnu.org/licenses/>. */
26 #ifndef GCC_MIPS_PROTOS_H
27 #define GCC_MIPS_PROTOS_H
29 /* Describes how a symbol is used.
32 The symbol is used as the target of a call instruction.
35 The symbol is used in a load-address operation.
38 The symbol is used as the address in a MEM. */
39 enum mips_symbol_context {
45 /* Classifies a SYMBOL_REF, LABEL_REF or UNSPEC address.
48 The symbol's value will be calculated using absolute relocations,
52 The symbol's value will be calculated by adding a 16-bit offset
56 The symbol's value will be calculated using a MIPS16 PC-relative
60 The symbol's value must be forced to memory and loaded from there.
63 The symbol's value will be calculated by loading an address
64 from the GOT and then applying a 16-bit offset.
67 The symbol's value will be loaded directly from the GOT.
70 An UNSPEC wrapper around a SYMBOL_GOT_PAGE_OFST. It represents the
71 offset from _gp of the GOT entry.
74 An UNSPEC wrapper around a SYMBOL_GOT_DISP. It represents the
75 the offset from _gp of the symbol's GOT entry.
78 Like SYMBOL_GOTOFF_DISP, but used when calling a global function.
79 The GOT entry is allowed to point to a stub rather than to the
83 An UNSPEC wrapper around a function's address. It represents the
84 offset of _gp from the start of the function.
87 A thread-local symbol.
94 UNSPEC wrappers around SYMBOL_TLS, corresponding to the
95 thread-local storage relocation operators.
98 For a 32-bit symbolic address X, this is the value of %hi(X).
101 For a 64-bit symbolic address X, this is the value of
102 (%highest(X) << 16) + %higher(X).
105 For a 64-bit symbolic address X, this is the value of
106 (%higher(X) << 16) + %hi(X).
109 For a 64-bit symbolic address X, this is the value of
110 (%hi(X) << 16) + %lo(X).
113 An UNSPEC wrapper around any kind of address. It represents the
114 low 16 bits of that address. */
115 enum mips_symbol_type {
120 SYMBOL_GOT_PAGE_OFST,
125 SYMBOL_GOTOFF_LOADGP,
138 #define NUM_SYMBOL_TYPES (SYMBOL_HALF + 1)
140 /* Identifiers a style of $gp initialization sequence.
143 No initialization sequence is needed.
146 The o32 and o64 PIC sequence (the kind traditionally generated
150 The n32 and n64 PIC sequence (the kind traditionally generated
154 The GNU absolute sequence, as generated by loadgp_absolute.
157 The VxWorks RTP PIC sequence, as generated by loadgp_rtp. */
158 enum mips_loadgp_style {
166 struct mips16e_save_restore_info;
168 /* Classifies a type of call.
171 A normal call or call_value pattern.
174 A sibcall or sibcall_value pattern.
177 A call inserted in the epilogue. */
178 enum mips_call_type {
184 extern bool mips_symbolic_constant_p (rtx, enum mips_symbol_context,
185 enum mips_symbol_type *);
186 extern int mips_regno_mode_ok_for_base_p (int, enum machine_mode, bool);
187 extern bool mips_legitimate_address_p (enum machine_mode, rtx, bool);
188 extern bool mips_stack_address_p (rtx, enum machine_mode);
189 extern int mips_address_insns (rtx, enum machine_mode, bool);
190 extern int mips_const_insns (rtx);
191 extern int mips_split_const_insns (rtx);
192 extern int mips_load_store_insns (rtx, rtx);
193 extern int mips_idiv_insns (void);
194 extern rtx mips_emit_move (rtx, rtx);
195 extern rtx mips_pic_base_register (rtx);
196 extern rtx mips_got_load (rtx, rtx, enum mips_symbol_type);
197 extern bool mips_split_symbol (rtx, rtx, enum machine_mode, rtx *);
198 extern rtx mips_unspec_address (rtx, enum mips_symbol_type);
199 extern void mips_move_integer (rtx, rtx, unsigned HOST_WIDE_INT);
200 extern bool mips_legitimize_move (enum machine_mode, rtx, rtx);
202 extern int m16_uimm3_b (rtx, enum machine_mode);
203 extern int m16_simm4_1 (rtx, enum machine_mode);
204 extern int m16_nsimm4_1 (rtx, enum machine_mode);
205 extern int m16_simm5_1 (rtx, enum machine_mode);
206 extern int m16_nsimm5_1 (rtx, enum machine_mode);
207 extern int m16_uimm5_4 (rtx, enum machine_mode);
208 extern int m16_nuimm5_4 (rtx, enum machine_mode);
209 extern int m16_simm8_1 (rtx, enum machine_mode);
210 extern int m16_nsimm8_1 (rtx, enum machine_mode);
211 extern int m16_uimm8_1 (rtx, enum machine_mode);
212 extern int m16_nuimm8_1 (rtx, enum machine_mode);
213 extern int m16_uimm8_m1_1 (rtx, enum machine_mode);
214 extern int m16_uimm8_4 (rtx, enum machine_mode);
215 extern int m16_nuimm8_4 (rtx, enum machine_mode);
216 extern int m16_simm8_8 (rtx, enum machine_mode);
217 extern int m16_nsimm8_8 (rtx, enum machine_mode);
219 extern rtx mips_subword (rtx, bool);
220 extern bool mips_split_64bit_move_p (rtx, rtx);
221 extern void mips_split_doubleword_move (rtx, rtx);
222 extern const char *mips_output_move (rtx, rtx);
223 extern void mips_restore_gp (rtx);
225 extern void mips_expand_scc (rtx *);
226 extern void mips_expand_conditional_branch (rtx *);
227 extern void mips_expand_vcondv2sf (rtx, rtx, rtx, enum rtx_code, rtx, rtx);
228 extern void mips_expand_conditional_move (rtx *);
229 extern void mips_expand_conditional_trap (rtx);
231 extern bool mips_use_pic_fn_addr_reg_p (const_rtx);
232 extern rtx mips_expand_call (enum mips_call_type, rtx, rtx, rtx, rtx, bool);
233 extern void mips_split_call (rtx, rtx);
234 extern void mips_expand_fcc_reload (rtx, rtx, rtx);
235 extern void mips_set_return_address (rtx, rtx);
236 extern bool mips_expand_block_move (rtx, rtx, rtx);
237 extern void mips_expand_synci_loop (rtx, rtx);
239 extern void mips_init_cumulative_args (CUMULATIVE_ARGS *, tree);
240 extern void mips_function_arg_advance (CUMULATIVE_ARGS *, enum machine_mode,
242 extern rtx mips_function_arg (const CUMULATIVE_ARGS *,
243 enum machine_mode, tree, int);
244 extern int mips_function_arg_boundary (enum machine_mode, tree);
245 extern bool mips_pad_arg_upward (enum machine_mode, const_tree);
246 extern bool mips_pad_reg_upward (enum machine_mode, tree);
248 extern bool mips_expand_ext_as_unaligned_load (rtx, rtx, HOST_WIDE_INT,
250 extern bool mips_expand_ins_as_unaligned_store (rtx, rtx, HOST_WIDE_INT,
252 extern bool mips_mem_fits_mode_p (enum machine_mode mode, rtx x);
253 extern void mips_override_options (void);
254 extern void mips_conditional_register_usage (void);
255 extern void mips_order_regs_for_local_alloc (void);
256 extern HOST_WIDE_INT mips_debugger_offset (rtx, HOST_WIDE_INT);
258 extern void mips_print_operand (FILE *, rtx, int);
259 extern void mips_print_operand_address (FILE *, rtx);
260 extern void mips_output_external (FILE *, tree, const char *);
261 extern void mips_output_filename (FILE *, const char *);
262 extern void mips_output_ascii (FILE *, const char *, size_t);
263 extern void mips_output_aligned_decl_common (FILE *, tree, const char *,
264 unsigned HOST_WIDE_INT,
266 extern void mips_declare_common_object (FILE *, const char *,
267 const char *, unsigned HOST_WIDE_INT,
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);
274 extern bool mips_small_data_pattern_p (rtx);
275 extern rtx mips_rewrite_small_data (rtx);
276 extern bool mips_frame_pointer_required (void);
277 extern HOST_WIDE_INT mips_initial_elimination_offset (int, int);
278 extern rtx mips_return_addr (int, rtx);
279 extern enum mips_loadgp_style mips_current_loadgp_style (void);
280 extern void mips_expand_prologue (void);
281 extern void mips_expand_before_return (void);
282 extern void mips_expand_epilogue (bool);
283 extern bool mips_can_use_return_insn (void);
284 extern rtx mips_function_value (const_tree, enum machine_mode);
286 extern bool mips_cannot_change_mode_class (enum machine_mode,
287 enum machine_mode, enum reg_class);
288 extern bool mips_dangerous_for_la25_p (rtx);
289 extern bool mips_modes_tieable_p (enum machine_mode, enum machine_mode);
290 extern enum reg_class mips_preferred_reload_class (rtx, enum reg_class);
291 extern enum reg_class mips_secondary_reload_class (enum reg_class,
294 extern int mips_class_max_nregs (enum reg_class, enum machine_mode);
295 extern int mips_register_move_cost (enum machine_mode, enum reg_class,
298 extern int mips_adjust_insn_length (rtx, int);
299 extern const char *mips_output_load_label (void);
300 extern const char *mips_output_conditional_branch (rtx, rtx *, const char *,
302 extern const char *mips_output_order_conditional_branch (rtx, rtx *, bool);
303 extern const char *mips_output_sync_loop (const char *);
304 extern const char *mips_output_division (const char *, rtx *);
305 extern unsigned int mips_hard_regno_nregs (int, enum machine_mode);
306 extern bool mips_linked_madd_p (rtx, rtx);
307 extern bool mips_store_data_bypass_p (rtx, rtx);
308 extern rtx mips_prefetch_cookie (rtx, rtx);
310 extern void irix_asm_output_align (FILE *, unsigned);
311 extern const char *current_section_name (void);
312 extern unsigned int current_section_flags (void);
313 extern bool mips_use_ins_ext_p (rtx, HOST_WIDE_INT, HOST_WIDE_INT);
315 extern const char *mips16e_output_save_restore (rtx, HOST_WIDE_INT);
316 extern bool mips16e_save_restore_pattern_p (rtx, HOST_WIDE_INT,
317 struct mips16e_save_restore_info *);
319 extern bool mask_low_and_shift_p (enum machine_mode, rtx, rtx, int);
320 extern int mask_low_and_shift_len (enum machine_mode, rtx, rtx);
322 union mips_gen_fn_ptrs
324 rtx (*fn_6) (rtx, rtx, rtx, rtx, rtx, rtx);
325 rtx (*fn_5) (rtx, rtx, rtx, rtx, rtx);
326 rtx (*fn_4) (rtx, rtx, rtx, rtx);
329 extern void mips_expand_atomic_qihi (union mips_gen_fn_ptrs,
332 extern void mips_expand_vector_init (rtx, rtx);
334 extern bool mips_epilogue_uses (unsigned int);
335 extern void mips_final_prescan_insn (rtx, rtx *, int);
337 #endif /* ! GCC_MIPS_PROTOS_H */