gcc/config/mips/mips-protos.h

   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 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
   9 This file is part of GCC.
  10
  11 GCC is free software; you can redistribute it and/or modify
  12 it under the terms of the GNU General Public License as published by
  13 the Free Software Foundation; either version 3, or (at your option)
  14 any later version.
  15
  16 GCC is distributed in the hope that it will be useful,
  17 but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 GNU General Public License for more details.
  20
  21 You should have received a copy of the GNU General Public License
  22 along with GCC; see the file COPYING3.  If not see
  23 <http://www.gnu.org/licenses/>.  */
  24
  25 #ifndef GCC_MIPS_PROTOS_H
  26 #define GCC_MIPS_PROTOS_H
  27
  28 /* Classifies a SYMBOL_REF, LABEL_REF or UNSPEC address.
  29
  30    SYMBOL_ABSOLUTE
  31        The symbol's value will be calculated using absolute relocations,
  32        such as %hi and %lo.
  33
  34    SYMBOL_GP_RELATIVE
  35        The symbol's value will be calculated by adding a 16-bit offset
  36        from $gp.
  37
  38    SYMBOL_PC_RELATIVE
  39        The symbol's value will be calculated using a MIPS16 PC-relative
  40        calculation.
  41
  42    SYMBOL_GOT_PAGE_OFST
  43        The symbol's value will be calculated by loading an address
  44        from the GOT and then applying a 16-bit offset.
  45
  46    SYMBOL_GOT_DISP
  47        The symbol's value will be loaded directly from the GOT.
  48
  49    SYMBOL_GOTOFF_PAGE
  50        An UNSPEC wrapper around a SYMBOL_GOT_PAGE_OFST.  It represents the
  51        offset from _gp of the GOT entry.
  52
  53    SYMBOL_GOTOFF_DISP
  54        An UNSPEC wrapper around a SYMBOL_GOT_DISP.  It represents the
  55        the offset from _gp of the symbol's GOT entry.
  56
  57    SYMBOL_GOTOFF_CALL
  58        Like SYMBOL_GOTOFF_DISP, but used when calling a global function.
  59        The GOT entry is allowed to point to a stub rather than to the
  60        function itself.
  61
  62    SYMBOL_GOTOFF_LOADGP
  63        An UNSPEC wrapper around a function's address.  It represents the
  64        offset of _gp from the start of the function.
  65
  66    SYMBOL_TLS
  67        A thread-local symbol.
  68
  69    SYMBOL_TLSGD
  70    SYMBOL_TLSLDM
  71    SYMBOL_DTPREL
  72    SYMBOL_GOTTPREL
  73    SYMBOL_TPREL
  74        UNSPEC wrappers around SYMBOL_TLS, corresponding to the
  75        thread-local storage relocation operators.
  76
  77    SYMBOL_64_HIGH
  78        For a 64-bit symbolic address X, this is the value of
  79        (%highest(X) << 16) + %higher(X).
  80
  81    SYMBOL_64_MID
  82        For a 64-bit symbolic address X, this is the value of
  83        (%higher(X) << 16) + %hi(X).
  84
  85    SYMBOL_64_LOW
  86        For a 64-bit symbolic address X, this is the value of
  87        (%hi(X) << 16) + %lo(X).
  88
  89    SYMBOL_HALF
  90        An UNSPEC wrapper around any kind of address.  It represents the
  91        low 16 bits of that address.  */
  92 enum mips_symbol_type {
  93   SYMBOL_ABSOLUTE,
  94   SYMBOL_GP_RELATIVE,
  95   SYMBOL_PC_RELATIVE,
  96   SYMBOL_GOT_PAGE_OFST,
  97   SYMBOL_GOT_DISP,
  98   SYMBOL_GOTOFF_PAGE,
  99   SYMBOL_GOTOFF_DISP,
 100   SYMBOL_GOTOFF_CALL,
 101   SYMBOL_GOTOFF_LOADGP,
 102   SYMBOL_TLS,
 103   SYMBOL_TLSGD,
 104   SYMBOL_TLSLDM,
 105   SYMBOL_DTPREL,
 106   SYMBOL_GOTTPREL,
 107   SYMBOL_TPREL,
 108   SYMBOL_64_HIGH,
 109   SYMBOL_64_MID,
 110   SYMBOL_64_LOW,
 111   SYMBOL_HALF
 112 };
 113 #define NUM_SYMBOL_TYPES (SYMBOL_HALF + 1)
 114
 115 /* Identifiers a style of $gp initialization sequence.
 116
 117    LOADGP_NONE
 118         No initialization sequence is needed.
 119
 120    LOADGP_OLDABI
 121         The o32 and o64 PIC sequence (the kind traditionally generated
 122         by .cpload).
 123
 124    LOADGP_NEWABI
 125         The n32 and n64 PIC sequence (the kind traditionally generated
 126         by .cpsetup).
 127
 128    LOADGP_ABSOLUTE
 129         The GNU absolute sequence, as generated by loadgp_absolute.
 130
 131    LOADGP_RTP
 132         The VxWorks RTP PIC sequence, as generated by loadgp_rtp.  */
 133 enum mips_loadgp_style {
 134   LOADGP_NONE,
 135   LOADGP_OLDABI,
 136   LOADGP_NEWABI,
 137   LOADGP_ABSOLUTE,
 138   LOADGP_RTP
 139 };
 140
 141 struct mips16e_save_restore_info;
 142
 143 extern bool mips_symbolic_constant_p (rtx, enum mips_symbol_type *);
 144 extern int mips_regno_mode_ok_for_base_p (int, enum machine_mode, int);
 145 extern bool mips_stack_address_p (rtx, enum machine_mode);
 146 extern int mips_address_insns (rtx, enum machine_mode);
 147 extern int mips_const_insns (rtx);
 148 extern int mips_fetch_insns (rtx);
 149 extern int mips_idiv_insns (void);
 150 extern int fp_register_operand (rtx, enum machine_mode);
 151 extern int lo_operand (rtx, enum machine_mode);
 152 extern bool mips_legitimate_address_p (enum machine_mode, rtx, int);
 153 extern rtx mips_split_symbol (rtx, rtx);
 154 extern rtx mips_unspec_address (rtx, enum mips_symbol_type);
 155 extern bool mips_legitimize_address (rtx *, enum machine_mode);
 156 extern void mips_move_integer (rtx, rtx, unsigned HOST_WIDE_INT);
 157 extern bool mips_legitimize_move (enum machine_mode, rtx, rtx);
 158
 159 extern int m16_uimm3_b (rtx, enum machine_mode);
 160 extern int m16_simm4_1 (rtx, enum machine_mode);
 161 extern int m16_nsimm4_1 (rtx, enum machine_mode);
 162 extern int m16_simm5_1 (rtx, enum machine_mode);
 163 extern int m16_nsimm5_1 (rtx, enum machine_mode);
 164 extern int m16_uimm5_4 (rtx, enum machine_mode);
 165 extern int m16_nuimm5_4 (rtx, enum machine_mode);
 166 extern int m16_simm8_1 (rtx, enum machine_mode);
 167 extern int m16_nsimm8_1 (rtx, enum machine_mode);
 168 extern int m16_uimm8_1 (rtx, enum machine_mode);
 169 extern int m16_nuimm8_1 (rtx, enum machine_mode);
 170 extern int m16_uimm8_m1_1 (rtx, enum machine_mode);
 171 extern int m16_uimm8_4 (rtx, enum machine_mode);
 172 extern int m16_nuimm8_4 (rtx, enum machine_mode);
 173 extern int m16_simm8_8 (rtx, enum machine_mode);
 174 extern int m16_nsimm8_8 (rtx, enum machine_mode);
 175
 176 extern rtx mips_subword (rtx, int);
 177 extern bool mips_split_64bit_move_p (rtx, rtx);
 178 extern void mips_split_64bit_move (rtx, rtx);
 179 extern const char *mips_output_move (rtx, rtx);
 180 extern void mips_restore_gp (void);
 181 #ifdef RTX_CODE
 182 extern bool mips_emit_scc (enum rtx_code, rtx);
 183 extern void gen_conditional_branch (rtx *, enum rtx_code);
 184 extern void mips_expand_vcondv2sf (rtx, rtx, rtx, enum rtx_code, rtx, rtx);
 185 #endif
 186 extern void gen_conditional_move (rtx *);
 187 extern void mips_gen_conditional_trap (rtx *);
 188 extern void mips_expand_call (rtx, rtx, rtx, rtx, int);
 189 extern void mips_emit_fcc_reload (rtx, rtx, rtx);
 190 extern void mips_set_return_address (rtx, rtx);
 191 extern bool mips_expand_block_move (rtx, rtx, rtx);
 192 extern void mips_expand_synci_loop (rtx, rtx);
 193
 194 extern void init_cumulative_args (CUMULATIVE_ARGS *, tree, rtx);
 195 extern void function_arg_advance (CUMULATIVE_ARGS *, enum machine_mode,
 196                                   tree, int);
 197 extern struct rtx_def *function_arg (const CUMULATIVE_ARGS *,
 198                                      enum machine_mode, tree, int);
 199 extern int function_arg_boundary (enum machine_mode, tree);
 200 extern bool mips_pad_arg_upward (enum machine_mode, tree);
 201 extern bool mips_pad_reg_upward (enum machine_mode, tree);
 202 extern void mips_va_start (tree, rtx);
 203
 204 extern bool mips_expand_unaligned_load (rtx, rtx, unsigned int, int);
 205 extern bool mips_expand_unaligned_store (rtx, rtx, unsigned int, int);
 206 extern bool mips_mem_fits_mode_p (enum machine_mode mode, rtx x);
 207 extern void override_options (void);
 208 extern void mips_conditional_register_usage (void);
 209 extern void mips_order_regs_for_local_alloc (void);
 210 extern HOST_WIDE_INT mips_debugger_offset (rtx, HOST_WIDE_INT);
 211
 212 extern void print_operand (FILE *, rtx, int);
 213 extern void print_operand_address (FILE *, rtx);
 214 extern void mips_output_external (FILE *, tree, const char *);
 215 extern void mips_output_filename (FILE *, const char *);
 216 extern void mips_output_ascii (FILE *, const char *, size_t, const char *);
 217 extern void mips_output_aligned_bss (FILE *, tree, const char *,
 218                                      unsigned HOST_WIDE_INT, int);
 219 extern void mips_output_aligned_decl_common (FILE *, tree, const char *,
 220                                              unsigned HOST_WIDE_INT,
 221                                              unsigned int);
 222 extern void mips_declare_common_object (FILE *, const char *,
 223                                         const char *, unsigned HOST_WIDE_INT,
 224                                         unsigned int, bool);
 225 extern void mips_declare_object (FILE *, const char *, const char *,
 226                                  const char *, ...) ATTRIBUTE_PRINTF_4;
 227 extern void mips_declare_object_name (FILE *, const char *, tree);
 228 extern void mips_finish_declare_object (FILE *, tree, int, int);
 229
 230 extern bool mips_small_data_pattern_p (rtx);
 231 extern rtx mips_rewrite_small_data (rtx);
 232 extern HOST_WIDE_INT compute_frame_size (HOST_WIDE_INT);
 233 extern HOST_WIDE_INT mips_initial_elimination_offset (int, int);
 234 extern rtx mips_return_addr (int, rtx);
 235 extern enum mips_loadgp_style mips_current_loadgp_style (void);
 236 extern void mips_expand_prologue (void);
 237 extern void mips_expand_epilogue (int);
 238 extern int mips_can_use_return_insn (void);
 239 extern struct rtx_def *mips_function_value (tree, tree, enum machine_mode);
 240
 241 extern bool mips_cannot_change_mode_class (enum machine_mode,
 242                                            enum machine_mode, enum reg_class);
 243 extern bool mips_dangerous_for_la25_p (rtx);
 244 extern enum reg_class mips_preferred_reload_class (rtx, enum reg_class);
 245 extern enum reg_class mips_secondary_reload_class (enum reg_class,
 246                                                    enum machine_mode,
 247                                                    rtx, int);
 248 extern int mips_class_max_nregs (enum reg_class, enum machine_mode);
 249 extern int build_mips16_call_stub (rtx, rtx, rtx, int);
 250 extern int mips_register_move_cost (enum machine_mode, enum reg_class,
 251                                     enum reg_class);
 252
 253 extern int mips_adjust_insn_length (rtx, int);
 254 extern const char *mips_output_load_label (void);
 255 extern const char *mips_output_conditional_branch (rtx, rtx *, const char *,
 256                                                    const char *);
 257 extern const char *mips_output_order_conditional_branch (rtx, rtx *, bool);
 258 extern const char *mips_output_division (const char *, rtx *);
 259 extern unsigned int mips_hard_regno_nregs (int, enum machine_mode);
 260 extern bool mips_linked_madd_p (rtx, rtx);
 261 extern int mips_store_data_bypass_p (rtx, rtx);
 262 extern rtx mips_prefetch_cookie (rtx, rtx);
 263
 264 extern void irix_asm_output_align (FILE *, unsigned);
 265 extern const char *current_section_name (void);
 266 extern unsigned int current_section_flags (void);
 267 extern bool mips_use_ins_ext_p (rtx, rtx, rtx);
 268
 269 extern const char *mips16e_output_save_restore (rtx, HOST_WIDE_INT);
 270 extern bool mips16e_save_restore_pattern_p (rtx, HOST_WIDE_INT,
 271                                             struct mips16e_save_restore_info *);
 272
 273 #endif /* ! GCC_MIPS_PROTOS_H */