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 /* Describes how a symbol is used.
  29
  30    SYMBOL_CONTEXT_CALL
  31        The symbol is used as the target of a call instruction.
  32
  33    SYMBOL_CONTEXT_LEA
  34        The symbol is used in a load-address operation.
  35
  36    SYMBOL_CONTEXT_MEM
  37        The symbol is used as the address in a MEM.  */
  38 enum mips_symbol_context {
  39   SYMBOL_CONTEXT_CALL,
  40   SYMBOL_CONTEXT_LEA,
  41   SYMBOL_CONTEXT_MEM
  42 };
  43
  44 /* Classifies a SYMBOL_REF, LABEL_REF or UNSPEC address.
  45
  46    SYMBOL_ABSOLUTE
  47        The symbol's value will be calculated using absolute relocations,
  48        such as %hi and %lo.
  49
  50    SYMBOL_GP_RELATIVE
  51        The symbol's value will be calculated by adding a 16-bit offset
  52        from $gp.
  53
  54    SYMBOL_PC_RELATIVE
  55        The symbol's value will be calculated using a MIPS16 PC-relative
  56        calculation.
  57
  58    SYMBOL_FORCE_TO_MEM
  59        The symbol's value must be forced to memory and loaded from there.
  60
  61    SYMBOL_GOT_PAGE_OFST
  62        The symbol's value will be calculated by loading an address
  63        from the GOT and then applying a 16-bit offset.
  64
  65    SYMBOL_GOT_DISP
  66        The symbol's value will be loaded directly from the GOT.
  67
  68    SYMBOL_GOTOFF_PAGE
  69        An UNSPEC wrapper around a SYMBOL_GOT_PAGE_OFST.  It represents the
  70        offset from _gp of the GOT entry.
  71
  72    SYMBOL_GOTOFF_DISP
  73        An UNSPEC wrapper around a SYMBOL_GOT_DISP.  It represents the
  74        the offset from _gp of the symbol's GOT entry.
  75
  76    SYMBOL_GOTOFF_CALL
  77        Like SYMBOL_GOTOFF_DISP, but used when calling a global function.
  78        The GOT entry is allowed to point to a stub rather than to the
  79        function itself.
  80
  81    SYMBOL_GOTOFF_LOADGP
  82        An UNSPEC wrapper around a function's address.  It represents the
  83        offset of _gp from the start of the function.
  84
  85    SYMBOL_TLS
  86        A thread-local symbol.
  87
  88    SYMBOL_TLSGD
  89    SYMBOL_TLSLDM
  90    SYMBOL_DTPREL
  91    SYMBOL_GOTTPREL
  92    SYMBOL_TPREL
  93        UNSPEC wrappers around SYMBOL_TLS, corresponding to the
  94        thread-local storage relocation operators.
  95
  96    SYMBOL_32_HIGH
  97        For a 32-bit symbolic address X, this is the value of %hi(X).
  98
  99    SYMBOL_64_HIGH
 100        For a 64-bit symbolic address X, this is the value of
 101        (%highest(X) << 16) + %higher(X).
 102
 103    SYMBOL_64_MID
 104        For a 64-bit symbolic address X, this is the value of
 105        (%higher(X) << 16) + %hi(X).
 106
 107    SYMBOL_64_LOW
 108        For a 64-bit symbolic address X, this is the value of
 109        (%hi(X) << 16) + %lo(X).
 110
 111    SYMBOL_HALF
 112        An UNSPEC wrapper around any kind of address.  It represents the
 113        low 16 bits of that address.  */
 114 enum mips_symbol_type {
 115   SYMBOL_ABSOLUTE,
 116   SYMBOL_GP_RELATIVE,
 117   SYMBOL_PC_RELATIVE,
 118   SYMBOL_FORCE_TO_MEM,
 119   SYMBOL_GOT_PAGE_OFST,
 120   SYMBOL_GOT_DISP,
 121   SYMBOL_GOTOFF_PAGE,
 122   SYMBOL_GOTOFF_DISP,
 123   SYMBOL_GOTOFF_CALL,
 124   SYMBOL_GOTOFF_LOADGP,
 125   SYMBOL_TLS,
 126   SYMBOL_TLSGD,
 127   SYMBOL_TLSLDM,
 128   SYMBOL_DTPREL,
 129   SYMBOL_GOTTPREL,
 130   SYMBOL_TPREL,
 131   SYMBOL_32_HIGH,
 132   SYMBOL_64_HIGH,
 133   SYMBOL_64_MID,
 134   SYMBOL_64_LOW,
 135   SYMBOL_HALF
 136 };
 137 #define NUM_SYMBOL_TYPES (SYMBOL_HALF + 1)
 138
 139 /* Identifiers a style of $gp initialization sequence.
 140
 141    LOADGP_NONE
 142         No initialization sequence is needed.
 143
 144    LOADGP_OLDABI
 145         The o32 and o64 PIC sequence (the kind traditionally generated
 146         by .cpload).
 147
 148    LOADGP_NEWABI
 149         The n32 and n64 PIC sequence (the kind traditionally generated
 150         by .cpsetup).
 151
 152    LOADGP_ABSOLUTE
 153         The GNU absolute sequence, as generated by loadgp_absolute.
 154
 155    LOADGP_RTP
 156         The VxWorks RTP PIC sequence, as generated by loadgp_rtp.  */
 157 enum mips_loadgp_style {
 158   LOADGP_NONE,
 159   LOADGP_OLDABI,
 160   LOADGP_NEWABI,
 161   LOADGP_ABSOLUTE,
 162   LOADGP_RTP
 163 };
 164
 165 struct mips16e_save_restore_info;
 166
 167 /* Classifies a type of call.
 168
 169    MIPS_CALL_NORMAL
 170         A normal call or call_value pattern.
 171
 172    MIPS_CALL_SIBCALL
 173         A sibcall or sibcall_value pattern.
 174
 175    MIPS_CALL_EPILOGUE
 176         A call inserted in the epilogue.  */
 177 enum mips_call_type {
 178   MIPS_CALL_NORMAL,
 179   MIPS_CALL_SIBCALL,
 180   MIPS_CALL_EPILOGUE
 181 };
 182
 183 extern bool mips_symbolic_constant_p (rtx, enum mips_symbol_context,
 184                                       enum mips_symbol_type *);
 185 extern int mips_regno_mode_ok_for_base_p (int, enum machine_mode, bool);
 186 extern bool mips_legitimate_address_p (enum machine_mode, rtx, bool);
 187 extern bool mips_stack_address_p (rtx, enum machine_mode);
 188 extern int mips_address_insns (rtx, enum machine_mode, bool);
 189 extern int mips_const_insns (rtx);
 190 extern int mips_split_const_insns (rtx);
 191 extern int mips_load_store_insns (rtx, rtx);
 192 extern int mips_idiv_insns (void);
 193 extern rtx mips_emit_move (rtx, rtx);
 194 extern rtx mips_pic_base_register (rtx);
 195 extern rtx mips_got_load (rtx, rtx, enum mips_symbol_type);
 196 extern bool mips_split_symbol (rtx, rtx, enum machine_mode, rtx *);
 197 extern rtx mips_unspec_address (rtx, enum mips_symbol_type);
 198 extern bool mips_legitimize_address (rtx *, enum machine_mode);
 199 extern void mips_move_integer (rtx, rtx, unsigned HOST_WIDE_INT);
 200 extern bool mips_legitimize_move (enum machine_mode, rtx, rtx);
 201
 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);
 218
 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);
 224 #ifdef RTX_CODE
 225 extern bool mips_expand_scc (enum rtx_code, rtx);
 226 extern void mips_expand_conditional_branch (rtx *, enum rtx_code);
 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 (enum rtx_code);
 230 #endif
 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);
 238
 239 extern void mips_init_cumulative_args (CUMULATIVE_ARGS *, tree);
 240 extern void mips_function_arg_advance (CUMULATIVE_ARGS *, enum machine_mode,
 241                                        tree, int);
 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);
 247
 248 extern bool mips_expand_ext_as_unaligned_load (rtx, rtx, HOST_WIDE_INT,
 249                                                HOST_WIDE_INT);
 250 extern bool mips_expand_ins_as_unaligned_store (rtx, rtx, HOST_WIDE_INT,
 251                                                 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);
 257
 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,
 265                                              unsigned int);
 266 extern void mips_declare_common_object (FILE *, const char *,
 267                                         const char *, unsigned HOST_WIDE_INT,
 268                                         unsigned int, bool);
 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);
 273
 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);
 285
 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,
 292                                                    enum machine_mode,
 293                                                    rtx, bool);
 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,
 296                                     enum reg_class);
 297
 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 *,
 301                                                    const char *);
 302 extern const char *mips_output_order_conditional_branch (rtx, rtx *, bool);
 303 extern const char *mips_output_division (const char *, rtx *);
 304 extern unsigned int mips_hard_regno_nregs (int, enum machine_mode);
 305 extern bool mips_linked_madd_p (rtx, rtx);
 306 extern bool mips_store_data_bypass_p (rtx, rtx);
 307 extern rtx mips_prefetch_cookie (rtx, rtx);
 308
 309 extern void irix_asm_output_align (FILE *, unsigned);
 310 extern const char *current_section_name (void);
 311 extern unsigned int current_section_flags (void);
 312 extern bool mips_use_ins_ext_p (rtx, HOST_WIDE_INT, HOST_WIDE_INT);
 313
 314 extern const char *mips16e_output_save_restore (rtx, HOST_WIDE_INT);
 315 extern bool mips16e_save_restore_pattern_p (rtx, HOST_WIDE_INT,
 316                                             struct mips16e_save_restore_info *);
 317
 318 extern bool mask_low_and_shift_p (enum machine_mode, rtx, rtx, int);
 319 extern int mask_low_and_shift_len (enum machine_mode, rtx, rtx);
 320
 321 union mips_gen_fn_ptrs
 322 {
 323   rtx (*fn_6) (rtx, rtx, rtx, rtx, rtx, rtx);
 324   rtx (*fn_5) (rtx, rtx, rtx, rtx, rtx);
 325   rtx (*fn_4) (rtx, rtx, rtx, rtx);
 326 };
 327
 328 extern void mips_expand_atomic_qihi (union mips_gen_fn_ptrs,
 329                                      rtx, rtx, rtx, rtx);
 330
 331 extern void mips_expand_vector_init (rtx, rtx);
 332
 333 #endif /* ! GCC_MIPS_PROTOS_H */