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bd9f1972 1/* Prototypes of target machine for GNU compiler. MIPS version.
214be03f 2 Copyright (C) 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
b52b1749 3 1999, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
66647d44 4 Free Software Foundation, Inc.
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5 Contributed by A. Lichnewsky (lich@inria.inria.fr).
6 Changed by Michael Meissner (meissner@osf.org).
85f65093 7 64-bit r4000 support by Ian Lance Taylor (ian@cygnus.com) and
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8 Brendan Eich (brendan@microunity.com).
9
7ec022b2 10This file is part of GCC.
bd9f1972 11
7ec022b2 12GCC is free software; you can redistribute it and/or modify
bd9f1972 13it under the terms of the GNU General Public License as published by
2f83c7d6 14the Free Software Foundation; either version 3, or (at your option)
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15any later version.
16
7ec022b2 17GCC is distributed in the hope that it will be useful,
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18but WITHOUT ANY WARRANTY; without even the implied warranty of
19MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20GNU General Public License for more details.
21
22You should have received a copy of the GNU General Public License
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23along with GCC; see the file COPYING3. If not see
24<http://www.gnu.org/licenses/>. */
bd9f1972 25
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26#ifndef GCC_MIPS_PROTOS_H
27#define GCC_MIPS_PROTOS_H
bd9f1972 28
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29/* Describes how a symbol is used.
30
31 SYMBOL_CONTEXT_CALL
32 The symbol is used as the target of a call instruction.
33
34 SYMBOL_CONTEXT_LEA
35 The symbol is used in a load-address operation.
36
37 SYMBOL_CONTEXT_MEM
38 The symbol is used as the address in a MEM. */
39enum mips_symbol_context {
40 SYMBOL_CONTEXT_CALL,
41 SYMBOL_CONTEXT_LEA,
42 SYMBOL_CONTEXT_MEM
43};
44
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45/* Classifies a SYMBOL_REF, LABEL_REF or UNSPEC address.
46
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47 SYMBOL_ABSOLUTE
48 The symbol's value will be calculated using absolute relocations,
49 such as %hi and %lo.
e245bd81 50
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51 SYMBOL_GP_RELATIVE
52 The symbol's value will be calculated by adding a 16-bit offset
53 from $gp.
e245bd81 54
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55 SYMBOL_PC_RELATIVE
56 The symbol's value will be calculated using a MIPS16 PC-relative
57 calculation.
e245bd81 58
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59 SYMBOL_FORCE_TO_MEM
60 The symbol's value must be forced to memory and loaded from there.
61
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62 SYMBOL_GOT_PAGE_OFST
63 The symbol's value will be calculated by loading an address
64 from the GOT and then applying a 16-bit offset.
e245bd81 65
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66 SYMBOL_GOT_DISP
67 The symbol's value will be loaded directly from the GOT.
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68
69 SYMBOL_GOTOFF_PAGE
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70 An UNSPEC wrapper around a SYMBOL_GOT_PAGE_OFST. It represents the
71 offset from _gp of the GOT entry.
e245bd81 72
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73 SYMBOL_GOTOFF_DISP
74 An UNSPEC wrapper around a SYMBOL_GOT_DISP. It represents the
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75 the offset from _gp of the symbol's GOT entry.
76
77 SYMBOL_GOTOFF_CALL
08e7ceb3 78 Like SYMBOL_GOTOFF_DISP, but used when calling a global function.
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79 The GOT entry is allowed to point to a stub rather than to the
80 function itself.
81
82 SYMBOL_GOTOFF_LOADGP
83 An UNSPEC wrapper around a function's address. It represents the
84 offset of _gp from the start of the function.
85
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86 SYMBOL_TLS
87 A thread-local symbol.
88
89 SYMBOL_TLSGD
90 SYMBOL_TLSLDM
91 SYMBOL_DTPREL
92 SYMBOL_GOTTPREL
93 SYMBOL_TPREL
94 UNSPEC wrappers around SYMBOL_TLS, corresponding to the
95 thread-local storage relocation operators.
96
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97 SYMBOL_32_HIGH
98 For a 32-bit symbolic address X, this is the value of %hi(X).
99
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100 SYMBOL_64_HIGH
101 For a 64-bit symbolic address X, this is the value of
102 (%highest(X) << 16) + %higher(X).
103
104 SYMBOL_64_MID
105 For a 64-bit symbolic address X, this is the value of
106 (%higher(X) << 16) + %hi(X).
107
108 SYMBOL_64_LOW
109 For a 64-bit symbolic address X, this is the value of
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110 (%hi(X) << 16) + %lo(X).
111
112 SYMBOL_HALF
113 An UNSPEC wrapper around any kind of address. It represents the
114 low 16 bits of that address. */
e245bd81 115enum mips_symbol_type {
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116 SYMBOL_ABSOLUTE,
117 SYMBOL_GP_RELATIVE,
118 SYMBOL_PC_RELATIVE,
e06e2776 119 SYMBOL_FORCE_TO_MEM,
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120 SYMBOL_GOT_PAGE_OFST,
121 SYMBOL_GOT_DISP,
e245bd81 122 SYMBOL_GOTOFF_PAGE,
08e7ceb3 123 SYMBOL_GOTOFF_DISP,
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124 SYMBOL_GOTOFF_CALL,
125 SYMBOL_GOTOFF_LOADGP,
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126 SYMBOL_TLS,
127 SYMBOL_TLSGD,
128 SYMBOL_TLSLDM,
129 SYMBOL_DTPREL,
130 SYMBOL_GOTTPREL,
131 SYMBOL_TPREL,
c93c5160 132 SYMBOL_32_HIGH,
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133 SYMBOL_64_HIGH,
134 SYMBOL_64_MID,
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135 SYMBOL_64_LOW,
136 SYMBOL_HALF
e245bd81 137};
8cb6400c 138#define NUM_SYMBOL_TYPES (SYMBOL_HALF + 1)
e245bd81 139
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140/* Identifiers a style of $gp initialization sequence.
141
142 LOADGP_NONE
143 No initialization sequence is needed.
144
145 LOADGP_OLDABI
146 The o32 and o64 PIC sequence (the kind traditionally generated
147 by .cpload).
148
149 LOADGP_NEWABI
150 The n32 and n64 PIC sequence (the kind traditionally generated
151 by .cpsetup).
152
153 LOADGP_ABSOLUTE
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154 The GNU absolute sequence, as generated by loadgp_absolute.
155
156 LOADGP_RTP
157 The VxWorks RTP PIC sequence, as generated by loadgp_rtp. */
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158enum mips_loadgp_style {
159 LOADGP_NONE,
160 LOADGP_OLDABI,
161 LOADGP_NEWABI,
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162 LOADGP_ABSOLUTE,
163 LOADGP_RTP
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164};
165
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166struct mips16e_save_restore_info;
167
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168/* Classifies a type of call.
169
170 MIPS_CALL_NORMAL
171 A normal call or call_value pattern.
172
173 MIPS_CALL_SIBCALL
174 A sibcall or sibcall_value pattern.
175
176 MIPS_CALL_EPILOGUE
177 A call inserted in the epilogue. */
178enum mips_call_type {
179 MIPS_CALL_NORMAL,
180 MIPS_CALL_SIBCALL,
181 MIPS_CALL_EPILOGUE
182};
183
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184extern bool mips_symbolic_constant_p (rtx, enum mips_symbol_context,
185 enum mips_symbol_type *);
65239d20 186extern int mips_regno_mode_ok_for_base_p (int, enum machine_mode, bool);
96a30b18 187extern bool mips_stack_address_p (rtx, enum machine_mode);
5955b0a3 188extern int mips_address_insns (rtx, enum machine_mode, bool);
b4966b1b 189extern int mips_const_insns (rtx);
c5cb5d18 190extern int mips_split_const_insns (rtx);
5955b0a3 191extern int mips_load_store_insns (rtx, rtx);
46490403 192extern int mips_idiv_insns (void);
51e7252a 193extern rtx mips_emit_move (rtx, rtx);
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194extern rtx mips_pic_base_register (rtx);
195extern rtx mips_got_load (rtx, rtx, enum mips_symbol_type);
390ea488 196extern bool mips_split_symbol (rtx, rtx, enum machine_mode, rtx *);
e245bd81 197extern rtx mips_unspec_address (rtx, enum mips_symbol_type);
ea462dd0 198extern void mips_move_integer (rtx, rtx, unsigned HOST_WIDE_INT);
b4966b1b 199extern bool mips_legitimize_move (enum machine_mode, rtx, rtx);
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200
201extern int m16_uimm3_b (rtx, enum machine_mode);
202extern int m16_simm4_1 (rtx, enum machine_mode);
203extern int m16_nsimm4_1 (rtx, enum machine_mode);
204extern int m16_simm5_1 (rtx, enum machine_mode);
205extern int m16_nsimm5_1 (rtx, enum machine_mode);
206extern int m16_uimm5_4 (rtx, enum machine_mode);
207extern int m16_nuimm5_4 (rtx, enum machine_mode);
208extern int m16_simm8_1 (rtx, enum machine_mode);
209extern int m16_nsimm8_1 (rtx, enum machine_mode);
210extern int m16_uimm8_1 (rtx, enum machine_mode);
211extern int m16_nuimm8_1 (rtx, enum machine_mode);
212extern int m16_uimm8_m1_1 (rtx, enum machine_mode);
213extern int m16_uimm8_4 (rtx, enum machine_mode);
214extern int m16_nuimm8_4 (rtx, enum machine_mode);
215extern int m16_simm8_8 (rtx, enum machine_mode);
216extern int m16_nsimm8_8 (rtx, enum machine_mode);
6b7d57c7 217
65239d20 218extern rtx mips_subword (rtx, bool);
b4966b1b 219extern bool mips_split_64bit_move_p (rtx, rtx);
0064fbe9 220extern void mips_split_doubleword_move (rtx, rtx);
b4966b1b 221extern const char *mips_output_move (rtx, rtx);
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222extern bool mips_cfun_has_cprestore_slot_p (void);
223extern bool mips_cprestore_address_p (rtx, bool);
224extern void mips_save_gp_to_cprestore_slot (rtx, rtx, rtx, rtx);
225extern void mips_restore_gp_from_cprestore_slot (rtx);
6b7d57c7 226#ifdef RTX_CODE
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227extern void mips_expand_scc (rtx *);
228extern void mips_expand_conditional_branch (rtx *);
ec4fc7ed 229extern void mips_expand_vcondv2sf (rtx, rtx, rtx, enum rtx_code, rtx, rtx);
65239d20 230extern void mips_expand_conditional_move (rtx *);
f90b7a5a 231extern void mips_expand_conditional_trap (rtx);
6b7d57c7 232#endif
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233extern bool mips_use_pic_fn_addr_reg_p (const_rtx);
234extern rtx mips_expand_call (enum mips_call_type, rtx, rtx, rtx, rtx, bool);
235extern void mips_split_call (rtx, rtx);
b53da244 236extern bool mips_get_pic_call_symbol (rtx *, int);
65239d20 237extern void mips_expand_fcc_reload (rtx, rtx, rtx);
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238extern void mips_set_return_address (rtx, rtx);
239extern bool mips_expand_block_move (rtx, rtx, rtx);
df770e04 240extern void mips_expand_synci_loop (rtx, rtx);
b4966b1b 241
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242extern void mips_init_cumulative_args (CUMULATIVE_ARGS *, tree);
243extern void mips_function_arg_advance (CUMULATIVE_ARGS *, enum machine_mode,
244 tree, int);
245extern rtx mips_function_arg (const CUMULATIVE_ARGS *,
246 enum machine_mode, tree, int);
247extern int mips_function_arg_boundary (enum machine_mode, tree);
586de218 248extern bool mips_pad_arg_upward (enum machine_mode, const_tree);
648bb159 249extern bool mips_pad_reg_upward (enum machine_mode, tree);
b4966b1b 250
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251extern bool mips_expand_ext_as_unaligned_load (rtx, rtx, HOST_WIDE_INT,
252 HOST_WIDE_INT);
253extern bool mips_expand_ins_as_unaligned_store (rtx, rtx, HOST_WIDE_INT,
254 HOST_WIDE_INT);
9226543b 255extern bool mips_mem_fits_mode_p (enum machine_mode mode, rtx x);
65239d20 256extern void mips_override_options (void);
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257extern void mips_conditional_register_usage (void);
258extern void mips_order_regs_for_local_alloc (void);
259extern HOST_WIDE_INT mips_debugger_offset (rtx, HOST_WIDE_INT);
260
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261extern void mips_push_asm_switch (struct mips_asm_switch *);
262extern void mips_pop_asm_switch (struct mips_asm_switch *);
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263extern void mips_print_operand (FILE *, rtx, int);
264extern void mips_print_operand_address (FILE *, rtx);
f8fdb503 265extern void mips_output_external (FILE *, tree, const char *);
b4966b1b 266extern void mips_output_filename (FILE *, const char *);
65239d20 267extern void mips_output_ascii (FILE *, const char *, size_t);
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268extern void mips_output_aligned_decl_common (FILE *, tree, const char *,
269 unsigned HOST_WIDE_INT,
270 unsigned int);
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271extern void mips_declare_common_object (FILE *, const char *,
272 const char *, unsigned HOST_WIDE_INT,
273 unsigned int, bool);
b4966b1b 274extern void mips_declare_object (FILE *, const char *, const char *,
99a3237a 275 const char *, ...) ATTRIBUTE_PRINTF_4;
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276extern void mips_declare_object_name (FILE *, const char *, tree);
277extern void mips_finish_declare_object (FILE *, tree, int, int);
278
96a30b18 279extern bool mips_small_data_pattern_p (rtx);
108b61d5 280extern rtx mips_rewrite_small_data (rtx);
e88fb323 281extern HOST_WIDE_INT mips_initial_elimination_offset (int, int);
b4966b1b 282extern rtx mips_return_addr (int, rtx);
0c433c31 283extern bool mips_must_initialize_gp_p (void);
d9870b7e 284extern enum mips_loadgp_style mips_current_loadgp_style (void);
0c433c31 285extern void mips_emit_save_slot_move (rtx, rtx, rtx);
b4966b1b 286extern void mips_expand_prologue (void);
2f7e2abb 287extern void mips_expand_before_return (void);
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288extern void mips_expand_epilogue (bool);
289extern bool mips_can_use_return_insn (void);
cde0f3fd 290extern rtx mips_function_value (const_tree, const_tree, enum machine_mode);
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291
292extern bool mips_cannot_change_mode_class (enum machine_mode,
293 enum machine_mode, enum reg_class);
a6008bd8 294extern bool mips_dangerous_for_la25_p (rtx);
e5a2b69d 295extern bool mips_modes_tieable_p (enum machine_mode, enum machine_mode);
a6008bd8 296extern enum reg_class mips_preferred_reload_class (rtx, enum reg_class);
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297extern enum reg_class mips_secondary_reload_class (enum reg_class,
298 enum machine_mode,
65239d20 299 rtx, bool);
b4966b1b 300extern int mips_class_max_nregs (enum reg_class, enum machine_mode);
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301extern int mips_register_move_cost (enum machine_mode, enum reg_class,
302 enum reg_class);
303
304extern int mips_adjust_insn_length (rtx, int);
0c433c31 305extern void mips_output_load_label (rtx);
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306extern const char *mips_output_conditional_branch (rtx, rtx *, const char *,
307 const char *);
308extern const char *mips_output_order_conditional_branch (rtx, rtx *, bool);
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309extern const char *mips_output_sync (void);
310extern const char *mips_output_sync_loop (rtx, rtx *);
311extern unsigned int mips_sync_loop_insns (rtx, rtx *);
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312extern const char *mips_output_division (const char *, rtx *);
313extern unsigned int mips_hard_regno_nregs (int, enum machine_mode);
39ba1719 314extern bool mips_linked_madd_p (rtx, rtx);
65239d20 315extern bool mips_store_data_bypass_p (rtx, rtx);
4767c570 316extern rtx mips_prefetch_cookie (rtx, rtx);
b4966b1b 317
3c7404d3 318extern void irix_asm_output_align (FILE *, unsigned);
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319extern const char *current_section_name (void);
320extern unsigned int current_section_flags (void);
65239d20 321extern bool mips_use_ins_ext_p (rtx, HOST_WIDE_INT, HOST_WIDE_INT);
bd9f1972 322
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323extern const char *mips16e_output_save_restore (rtx, HOST_WIDE_INT);
324extern bool mips16e_save_restore_pattern_p (rtx, HOST_WIDE_INT,
325 struct mips16e_save_restore_info *);
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326
327extern bool mask_low_and_shift_p (enum machine_mode, rtx, rtx, int);
328extern int mask_low_and_shift_len (enum machine_mode, rtx, rtx);
b2c9d70f 329extern bool and_operands_ok (enum machine_mode, rtx, rtx);
49912bcd 330
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331union mips_gen_fn_ptrs
332{
333 rtx (*fn_6) (rtx, rtx, rtx, rtx, rtx, rtx);
334 rtx (*fn_5) (rtx, rtx, rtx, rtx, rtx);
335 rtx (*fn_4) (rtx, rtx, rtx, rtx);
336};
337
338extern void mips_expand_atomic_qihi (union mips_gen_fn_ptrs,
339 rtx, rtx, rtx, rtx);
e1260576 340
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341extern void mips_expand_vector_init (rtx, rtx);
342
0c433c31 343extern bool mips_eh_uses (unsigned int);
e19da24c 344extern bool mips_epilogue_uses (unsigned int);
1afc5373 345extern void mips_final_prescan_insn (rtx, rtx *, int);
c640a3bd 346extern int mips_trampoline_code_size (void);
e19da24c 347
88657302 348#endif /* ! GCC_MIPS_PROTOS_H */
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