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/* Declarations for interface to insn recognizer and insn-output.c.
Copyright (C) 1987, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* Random number that should be large enough for all purposes. */
#define MAX_RECOG_ALTERNATIVES 30
/* Types of operands. */
enum op_type {
OP_IN,
OP_OUT,
OP_INOUT
};
struct operand_alternative
{
/* Pointer to the beginning of the constraint string for this alternative,
for easier access by alternative number. */
const char *constraint;
/* The register class valid for this alternative (possibly NO_REGS). */
enum reg_class class;
/* "Badness" of this alternative, computed from number of '?' and '!'
characters in the constraint string. */
unsigned int reject;
/* -1 if no matching constraint was found, or an operand number. */
int matches;
/* The same information, but reversed: -1 if this operand is not
matched by any other, or the operand number of the operand that
matches this one. */
int matched;
/* Nonzero if '&' was found in the constraint string. */
unsigned int earlyclobber:1;
/* Nonzero if 'm' was found in the constraint string. */
unsigned int memory_ok:1;
/* Nonzero if 'o' was found in the constraint string. */
unsigned int offmem_ok:1;
/* Nonzero if 'V' was found in the constraint string. */
unsigned int nonoffmem_ok:1;
/* Nonzero if '<' was found in the constraint string. */
unsigned int decmem_ok:1;
/* Nonzero if '>' was found in the constraint string. */
unsigned int incmem_ok:1;
/* Nonzero if 'X' was found in the constraint string, or if the constraint
string for this alternative was empty. */
unsigned int anything_ok:1;
};
extern void init_recog PROTO((void));
extern void init_recog_no_volatile PROTO((void));
extern int recog_memoized PROTO((rtx));
extern int check_asm_operands PROTO((rtx));
extern int asm_operand_ok PROTO((rtx, const char *));
extern int validate_change PROTO((rtx, rtx *, rtx, int));
extern int apply_change_group PROTO((void));
extern int num_validated_changes PROTO((void));
extern void cancel_changes PROTO((int));
extern int constrain_operands PROTO((int));
extern int memory_address_p PROTO((enum machine_mode, rtx));
extern int strict_memory_address_p PROTO((enum machine_mode, rtx));
extern int validate_replace_rtx PROTO((rtx, rtx, rtx));
extern void validate_replace_rtx_group PROTO((rtx, rtx, rtx));
extern int validate_replace_src PROTO((rtx, rtx, rtx));
#ifdef HAVE_cc0
extern int next_insn_tests_no_inequality PROTO ((rtx));
#endif
extern int reg_fits_class_p PROTO((rtx, enum reg_class, int,
enum machine_mode));
extern rtx *find_single_use PROTO((rtx, rtx, rtx *));
extern int general_operand PROTO((rtx, enum machine_mode));
extern int address_operand PROTO((rtx, enum machine_mode));
extern int register_operand PROTO((rtx, enum machine_mode));
extern int scratch_operand PROTO((rtx, enum machine_mode));
extern int immediate_operand PROTO((rtx, enum machine_mode));
extern int const_int_operand PROTO((rtx, enum machine_mode));
extern int const_double_operand PROTO((rtx, enum machine_mode));
extern int nonimmediate_operand PROTO((rtx, enum machine_mode));
extern int nonmemory_operand PROTO((rtx, enum machine_mode));
extern int push_operand PROTO((rtx, enum machine_mode));
extern int pop_operand PROTO((rtx, enum machine_mode));
extern int memory_operand PROTO((rtx, enum machine_mode));
extern int indirect_operand PROTO((rtx, enum machine_mode));
extern int mode_independent_operand PROTO((rtx, enum machine_mode));
extern int comparison_operator PROTO((rtx, enum machine_mode));
extern int offsettable_memref_p PROTO((rtx));
extern int offsettable_nonstrict_memref_p PROTO((rtx));
extern int offsettable_address_p PROTO((int, enum machine_mode, rtx));
extern int mode_dependent_address_p PROTO((rtx));
extern int recog PROTO((rtx, rtx, int *));
extern void add_clobbers PROTO((rtx, int));
extern void insn_extract PROTO((rtx));
extern void extract_insn PROTO((rtx));
extern void preprocess_constraints PROTO((void));
/* Nonzero means volatile operands are recognized. */
extern int volatile_ok;
/* Set by constrain_operands to the number of the alternative that
matched. */
extern int which_alternative;
/* The following vectors hold the results from insn_extract. */
/* Indexed by N, gives value of operand N. */
extern rtx recog_operand[];
/* Indexed by N, gives location where operand N was found. */
extern rtx *recog_operand_loc[];
/* Indexed by N, gives location where the Nth duplicate-appearance of
an operand was found. This is something that matched MATCH_DUP. */
extern rtx *recog_dup_loc[];
/* Indexed by N, gives the operand number that was duplicated in the
Nth duplicate-appearance of an operand. */
extern char recog_dup_num[];
/* The next variables are set up by extract_insn. */
/* The number of operands of the insn. */
extern int recog_n_operands;
/* The number of MATCH_DUPs in the insn. */
extern int recog_n_dups;
/* The number of alternatives in the constraints for the insn. */
extern int recog_n_alternatives;
/* Indexed by N, gives the mode of operand N. */
extern enum machine_mode recog_operand_mode[];
/* Indexed by N, gives the constraint string for operand N. */
extern const char *recog_constraints[];
/* Indexed by N, gives the type (in, out, inout) for operand N. */
extern enum op_type recog_op_type[];
#ifndef REGISTER_CONSTRAINTS
/* Indexed by N, nonzero if operand N should be an address. */
extern char recog_operand_address_p[];
#endif
/* Contains a vector of operand_alternative structures for every operand.
Set up by preprocess_constraints. */
extern struct operand_alternative recog_op_alt[MAX_RECOG_OPERANDS][MAX_RECOG_ALTERNATIVES];
/* Access the output function for CODE. */
#define OUT_FCN(CODE) (*insn_outfun[(int) (CODE)])
/* Tables defined in insn-output.c that give information about
each insn-code value. */
/* These are vectors indexed by insn-code. Details in genoutput.c. */
extern const char *const insn_template[];
extern const char *(*const insn_outfun[]) ();
extern const int insn_n_operands[];
extern const int insn_n_dups[];
/* Indexed by insn code number, gives # of constraint alternatives. */
extern const int insn_n_alternatives[];
/* These are two-dimensional arrays indexed first by the insn-code
and second by the operand number. Details in genoutput.c. */
#ifdef REGISTER_CONSTRAINTS /* Avoid undef sym in certain broken linkers. */
extern const char *const insn_operand_constraint[][MAX_RECOG_OPERANDS];
#endif
#ifndef REGISTER_CONSTRAINTS /* Avoid undef sym in certain broken linkers. */
extern const char insn_operand_address_p[][MAX_RECOG_OPERANDS];
#endif
extern const enum machine_mode insn_operand_mode[][MAX_RECOG_OPERANDS];
extern const char insn_operand_strict_low[][MAX_RECOG_OPERANDS];
extern int (*const insn_operand_predicate[][MAX_RECOG_OPERANDS]) ();
extern const char * insn_name[];
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