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 Free Software Foundation, Inc.
4   Contributed by A. Lichnewsky (lich@inria.inria.fr).
5   Changed by Michael Meissner	(meissner@osf.org).
6   64 bit r4000 support by Ian Lance Taylor (ian@cygnus.com) and
7   Brendan Eich (brendan@microunity.com).
8
9This file is part of GCC.
10
11GCC is free software; you can redistribute it and/or modify
12it under the terms of the GNU General Public License as published by
13the Free Software Foundation; either version 2, or (at your option)
14any later version.
15
16GCC is distributed in the hope that it will be useful,
17but WITHOUT ANY WARRANTY; without even the implied warranty of
18MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19GNU General Public License for more details.
20
21You should have received a copy of the GNU General Public License
22along with GCC; see the file COPYING.  If not, write to
23the Free Software Foundation, 51 Franklin Street, Fifth Floor,
24Boston, MA 02110-1301, USA.  */
25
26#ifndef GCC_MIPS_PROTOS_H
27#define GCC_MIPS_PROTOS_H
28
29/* Classifies a SYMBOL_REF, LABEL_REF or UNSPEC address.
30
31   SYMBOL_GENERAL
32       Used when none of the below apply.
33
34   SYMBOL_SMALL_DATA
35       The symbol refers to something in a small data section.
36
37   SYMBOL_CONSTANT_POOL
38       The symbol refers to something in the mips16 constant pool.
39
40   SYMBOL_GOT_LOCAL
41       The symbol refers to local data that will be found using
42       the global offset table.
43
44   SYMBOL_GOT_GLOBAL
45       Likewise non-local data.
46
47   SYMBOL_GOTOFF_PAGE
48       An UNSPEC wrapper around a SYMBOL_GOT_LOCAL.  It represents the
49       offset from _gp of a GOT page entry.
50
51   SYMBOL_GOTOFF_GLOBAL
52       An UNSPEC wrapper around a SYMBOL_GOT_GLOBAL.  It represents the
53       the offset from _gp of the symbol's GOT entry.
54
55   SYMBOL_GOTOFF_CALL
56       Like SYMBOL_GOTOFF_GLOBAL, but used when calling a global function.
57       The GOT entry is allowed to point to a stub rather than to the
58       function itself.
59
60   SYMBOL_GOTOFF_LOADGP
61       An UNSPEC wrapper around a function's address.  It represents the
62       offset of _gp from the start of the function.
63
64   SYMBOL_TLS
65       A thread-local symbol.
66
67   SYMBOL_TLSGD
68   SYMBOL_TLSLDM
69   SYMBOL_DTPREL
70   SYMBOL_GOTTPREL
71   SYMBOL_TPREL
72       UNSPEC wrappers around SYMBOL_TLS, corresponding to the
73       thread-local storage relocation operators.
74
75   SYMBOL_64_HIGH
76       For a 64-bit symbolic address X, this is the value of
77       (%highest(X) << 16) + %higher(X).
78
79   SYMBOL_64_MID
80       For a 64-bit symbolic address X, this is the value of
81       (%higher(X) << 16) + %hi(X).
82
83   SYMBOL_64_LOW
84       For a 64-bit symbolic address X, this is the value of
85       (%hi(X) << 16) + %lo(X).  */
86enum mips_symbol_type {
87  SYMBOL_GENERAL,
88  SYMBOL_SMALL_DATA,
89  SYMBOL_CONSTANT_POOL,
90  SYMBOL_GOT_LOCAL,
91  SYMBOL_GOT_GLOBAL,
92  SYMBOL_GOTOFF_PAGE,
93  SYMBOL_GOTOFF_GLOBAL,
94  SYMBOL_GOTOFF_CALL,
95  SYMBOL_GOTOFF_LOADGP,
96  SYMBOL_TLS,
97  SYMBOL_TLSGD,
98  SYMBOL_TLSLDM,
99  SYMBOL_DTPREL,
100  SYMBOL_GOTTPREL,
101  SYMBOL_TPREL,
102  SYMBOL_64_HIGH,
103  SYMBOL_64_MID,
104  SYMBOL_64_LOW
105};
106#define NUM_SYMBOL_TYPES (SYMBOL_64_LOW + 1)
107
108/* Identifiers a style of $gp initialization sequence.
109
110   LOADGP_NONE
111	No initialization sequence is needed.
112
113   LOADGP_OLDABI
114	The o32 and o64 PIC sequence (the kind traditionally generated
115	by .cpload).
116
117   LOADGP_NEWABI
118	The n32 and n64 PIC sequence (the kind traditionally generated
119	by .cpsetup).
120
121   LOADGP_ABSOLUTE
122	The GNU absolute sequence, as generated by loadgp_noshared.  */
123enum mips_loadgp_style {
124  LOADGP_NONE,
125  LOADGP_OLDABI,
126  LOADGP_NEWABI,
127  LOADGP_ABSOLUTE
128};
129
130extern bool mips_symbolic_constant_p (rtx, enum mips_symbol_type *);
131extern int mips_regno_mode_ok_for_base_p (int, enum machine_mode, int);
132extern bool mips_stack_address_p (rtx, enum machine_mode);
133extern int mips_address_insns (rtx, enum machine_mode);
134extern int mips_const_insns (rtx);
135extern int mips_fetch_insns (rtx);
136extern int mips_idiv_insns (void);
137extern int fp_register_operand (rtx, enum machine_mode);
138extern int lo_operand (rtx, enum machine_mode);
139extern bool mips_legitimate_address_p (enum machine_mode, rtx, int);
140extern rtx mips_split_symbol (rtx, rtx);
141extern rtx mips_unspec_address (rtx, enum mips_symbol_type);
142extern bool mips_legitimize_address (rtx *, enum machine_mode);
143extern void mips_move_integer (rtx, rtx, unsigned HOST_WIDE_INT);
144extern bool mips_legitimize_move (enum machine_mode, rtx, rtx);
145
146extern int m16_uimm3_b (rtx, enum machine_mode);
147extern int m16_simm4_1 (rtx, enum machine_mode);
148extern int m16_nsimm4_1 (rtx, enum machine_mode);
149extern int m16_simm5_1 (rtx, enum machine_mode);
150extern int m16_nsimm5_1 (rtx, enum machine_mode);
151extern int m16_uimm5_4 (rtx, enum machine_mode);
152extern int m16_nuimm5_4 (rtx, enum machine_mode);
153extern int m16_simm8_1 (rtx, enum machine_mode);
154extern int m16_nsimm8_1 (rtx, enum machine_mode);
155extern int m16_uimm8_1 (rtx, enum machine_mode);
156extern int m16_nuimm8_1 (rtx, enum machine_mode);
157extern int m16_uimm8_m1_1 (rtx, enum machine_mode);
158extern int m16_uimm8_4 (rtx, enum machine_mode);
159extern int m16_nuimm8_4 (rtx, enum machine_mode);
160extern int m16_simm8_8 (rtx, enum machine_mode);
161extern int m16_nsimm8_8 (rtx, enum machine_mode);
162
163extern rtx mips_subword (rtx, int);
164extern bool mips_split_64bit_move_p (rtx, rtx);
165extern void mips_split_64bit_move (rtx, rtx);
166extern const char *mips_output_move (rtx, rtx);
167extern void mips_restore_gp (void);
168#ifdef RTX_CODE
169extern bool mips_emit_scc (enum rtx_code, rtx);
170extern void gen_conditional_branch (rtx *, enum rtx_code);
171extern void mips_expand_vcondv2sf (rtx, rtx, rtx, enum rtx_code, rtx, rtx);
172#endif
173extern void gen_conditional_move (rtx *);
174extern void mips_gen_conditional_trap (rtx *);
175extern void mips_expand_call (rtx, rtx, rtx, rtx, int);
176extern void mips_emit_fcc_reload (rtx, rtx, rtx);
177extern void mips_set_return_address (rtx, rtx);
178extern bool mips_expand_block_move (rtx, rtx, rtx);
179
180extern void init_cumulative_args (CUMULATIVE_ARGS *, tree, rtx);
181extern void function_arg_advance (CUMULATIVE_ARGS *, enum machine_mode,
182				  tree, int);
183extern struct rtx_def *function_arg (const CUMULATIVE_ARGS *,
184				     enum machine_mode, tree, int);
185extern int function_arg_boundary (enum machine_mode, tree);
186extern bool mips_pad_arg_upward (enum machine_mode, tree);
187extern bool mips_pad_reg_upward (enum machine_mode, tree);
188extern void mips_va_start (tree, rtx);
189
190extern bool mips_expand_unaligned_load (rtx, rtx, unsigned int, int);
191extern bool mips_expand_unaligned_store (rtx, rtx, unsigned int, int);
192extern bool mips_mem_fits_mode_p (enum machine_mode mode, rtx x);
193extern void override_options (void);
194extern void mips_conditional_register_usage (void);
195extern void mips_order_regs_for_local_alloc (void);
196extern HOST_WIDE_INT mips_debugger_offset (rtx, HOST_WIDE_INT);
197
198extern void print_operand (FILE *, rtx, int);
199extern void print_operand_address (FILE *, rtx);
200extern int mips_output_external (FILE *, tree, const char *);
201extern void mips_output_filename (FILE *, const char *);
202extern void mips_output_ascii (FILE *, const char *, size_t, const char *);
203extern void mips_output_aligned_bss (FILE *, tree, const char *,
204				     unsigned HOST_WIDE_INT, int);
205extern void mips_output_aligned_decl_common (FILE *, tree, const char *,
206					     unsigned HOST_WIDE_INT,
207					     unsigned int);
208extern void mips_declare_common_object (FILE *, const char *,
209					const char *, unsigned HOST_WIDE_INT,
210					unsigned int, bool);
211extern void mips_declare_object (FILE *, const char *, const char *,
212				 const char *, ...) ATTRIBUTE_PRINTF_4;
213extern void mips_declare_object_name (FILE *, const char *, tree);
214extern void mips_finish_declare_object (FILE *, tree, int, int);
215
216extern bool mips_small_data_pattern_p (rtx);
217extern rtx mips_rewrite_small_data (rtx);
218extern HOST_WIDE_INT compute_frame_size (HOST_WIDE_INT);
219extern HOST_WIDE_INT mips_initial_elimination_offset (int, int);
220extern rtx mips_return_addr (int, rtx);
221extern enum mips_loadgp_style mips_current_loadgp_style (void);
222extern void mips_expand_prologue (void);
223extern void mips_expand_epilogue (int);
224extern int mips_can_use_return_insn (void);
225extern struct rtx_def *mips_function_value (tree, tree, enum machine_mode);
226
227extern bool mips_cannot_change_mode_class (enum machine_mode,
228					   enum machine_mode, enum reg_class);
229extern bool mips_dangerous_for_la25_p (rtx);
230extern enum reg_class mips_preferred_reload_class (rtx, enum reg_class);
231extern enum reg_class mips_secondary_reload_class (enum reg_class,
232						   enum machine_mode,
233						   rtx, int);
234extern int mips_class_max_nregs (enum reg_class, enum machine_mode);
235extern int build_mips16_call_stub (rtx, rtx, rtx, int);
236extern int mips_register_move_cost (enum machine_mode, enum reg_class,
237				    enum reg_class);
238
239extern int mips_adjust_insn_length (rtx, int);
240extern const char *mips_output_load_label (void);
241extern const char *mips_output_conditional_branch (rtx, rtx *, const char *,
242						   const char *);
243extern const char *mips_output_order_conditional_branch (rtx, rtx *, bool);
244extern const char *mips_output_division (const char *, rtx *);
245extern unsigned int mips_hard_regno_nregs (int, enum machine_mode);
246extern bool mips_linked_madd_p (rtx, rtx);
247extern int mips_store_data_bypass_p (rtx, rtx);
248extern rtx mips_prefetch_cookie (rtx, rtx);
249
250extern void irix_asm_output_align (FILE *, unsigned);
251extern const char *current_section_name (void);
252extern unsigned int current_section_flags (void);
253extern bool mips_use_ins_ext_p (rtx, rtx, rtx);
254
255#endif /* ! GCC_MIPS_PROTOS_H */
256