/* Generate code from to output assembler insns as recognized from rtl.
Copyright (C) 1987, 1988, 1992 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)
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, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* This program reads the machine description for the compiler target machine
and produces a file containing these things:
1. An array of strings `insn_template' which is indexed by insn code number
and contains the template for output of that insn,
2. An array of functions `insn_outfun' which, indexed by the insn code
number, gives the function that returns a template to use for output of
that insn. This is used only in the cases where the template is not
constant. These cases are specified by a * or @ at the beginning of the
template string in the machine description. They are identified for the
sake of other parts of the compiler by a zero element in `insn_template'.
3. An array of functions `insn_gen_function' which, indexed
by insn code number, gives the function to generate a body
for that pattern, given operands as arguments.
4. An array of strings `insn_name' which, indexed by insn code number,
gives the name for that pattern. Nameless patterns are given a name.
5. An array of ints `insn_n_operands' which is indexed by insn code number
and contains the number of distinct operands in the pattern for that insn,
6. An array of ints `insn_n_dups' which is indexed by insn code number
and contains the number of match_dup's that appear in the insn's pattern.
This says how many elements of `recog_dup_loc' are significant
after an insn has been recognized.
7. An array of arrays of operand constraint strings,
`insn_operand_constraint',
indexed first by insn code number and second by operand number,
containing the constraint for that operand.
This array is generated only if register constraints appear in
8. An array of arrays of chars which indicate which operands of
which insn patterns appear within ADDRESS rtx's. This array is
called `insn_operand_address_p' and is generated only if there
are *no* register constraints in the match_operand rtx's.
9. An array of arrays of machine modes, `insn_operand_mode',
indexed first by insn code number and second by operand number,
containing the machine mode that that operand is supposed to have.
Also `insn_operand_strict_low', which is nonzero for operands
contained in a STRICT_LOW_PART.
10. An array of arrays of int-valued functions, `insn_operand_predicate',
indexed first by insn code number and second by operand number,
containing the match_operand predicate for this operand.
11. An array of ints, `insn_n_alternatives', that gives the number
of alternatives in the constraints of each pattern.
The code number of an insn is simply its position in the machine description;
code numbers are assigned sequentially to entries in the description,
starting with code number 0.
Thus, the following entry in the machine description
[(set (match_operand:DF 0 "general_operand" "")
assuming it is the 25th entry present, would cause
insn_template[24] to be "clrd %0", and insn_n_operands[24] to be 1.
It would not make an case in output_insn_hairy because the template
given in the entry is a constant (it does not start with `*'). */
/* No instruction can have more operands than this.
Sorry for this arbitrary limit, but what machine will
have an instruction with this many operands? */
#define MAX_MAX_OPERANDS 40
static struct obstack obstack
;
struct obstack
*rtl_obstack
= &obstack
;
#define obstack_chunk_alloc xmalloc
#define obstack_chunk_free free
static int n_occurrences ();
/* insns in the machine description are assigned sequential code numbers
that are used by insn-recog.c (produced by genrecog) to communicate
to insn-output.c (produced by this program). */
static int next_code_number
;
/* This counts all definitions in the md file,
for the sake of error messages. */
static int next_index_number
;
/* Record in this chain all information that we will output,
associated with the code number of the insn. */
char *template; /* string such as "movl %1,%0" */
int n_operands
; /* Number of operands this insn recognizes */
int n_dups
; /* Number times match_dup appears in pattern */
int n_alternatives
; /* Number of alternatives in each constraint */
char *constraints
[MAX_MAX_OPERANDS
];
/* Number of alternatives in constraints of operand N. */
int op_n_alternatives
[MAX_MAX_OPERANDS
];
char *predicates
[MAX_MAX_OPERANDS
];
char address_p
[MAX_MAX_OPERANDS
];
enum machine_mode modes
[MAX_MAX_OPERANDS
];
char strict_low
[MAX_MAX_OPERANDS
];
char outfun
; /* Nonzero means this has an output function */
/* This variable points to the first link in the chain. */
/* Pointer to the last link in the chain, so new elements
can be added at the end. */
struct data
*end_of_insn_data
;
/* Nonzero if any match_operand has a constraint string;
implies that REGISTER_CONSTRAINTS will be defined
for this machine description. */
printf ("/* Generated automatically by the program `genoutput'\n\
from the machine description file `md'. */\n\n");
printf ("#include \"config.h\"\n");
printf ("#include \"rtl.h\"\n");
printf ("#include \"regs.h\"\n");
printf ("#include \"hard-reg-set.h\"\n");
printf ("#include \"real.h\"\n");
printf ("#include \"insn-config.h\"\n\n");
printf ("#include \"conditions.h\"\n");
printf ("#include \"insn-flags.h\"\n");
printf ("#include \"insn-attr.h\"\n\n");
printf ("#include \"insn-codes.h\"\n\n");
printf ("#include \"recog.h\"\n\n");
printf ("#include <stdio.h>\n");
printf ("#include \"output.h\"\n");
printf ("\nchar * const insn_template[] =\n {\n");
for (d
= insn_data
; d
; d
= d
->next
)
printf (" \"%s\",\n", d
->template);
printf ("\nchar *(*const insn_outfun[])() =\n {\n");
for (d
= insn_data
; d
; d
= d
->next
)
printf (" output_%d,\n", d
->code_number
);
printf ("\nrtx (*const insn_gen_function[]) () =\n {\n");
for (d
= insn_data
; d
; d
= d
->next
)
printf (" gen_%s,\n", d
->name
);
printf ("\nchar *insn_name[] =\n {\n");
for (n
= insn_data
, next
= 0; n
; n
= n
->next
, next
++)
for (d
= insn_data
; d
; d
= d
->next
)
printf (" \"%s\",\n", d
->name
);
for (n
= d
->next
, next
= 1; n
; n
= n
->next
, next
++)
if (next_name
&& (last_name
== 0 || offset
> next
/ 2))
printf (" \"%s-%d\",\n", next_name
, next
- offset
);
printf (" \"%s+%d\",\n", last_name
, offset
);
printf ("char **insn_name_ptr = insn_name;\n");
printf ("\nconst int insn_n_operands[] =\n {\n");
for (d
= insn_data
; d
; d
= d
->next
)
printf (" %d,\n", d
->n_operands
);
printf ("\nconst int insn_n_dups[] =\n {\n");
for (d
= insn_data
; d
; d
= d
->next
)
printf (" %d,\n", d
->n_dups
);
printf ("\nchar *const insn_operand_constraint[][MAX_RECOG_OPERANDS] =\n {\n");
for (d
= insn_data
; d
; d
= d
->next
)
for (i
= 0; i
< d
->n_operands
; i
++)
if (d
->constraints
[i
] == 0)
printf (" \"%s\",", d
->constraints
[i
]);
printf ("\nconst char insn_operand_address_p[][MAX_RECOG_OPERANDS] =\n {\n");
for (d
= insn_data
; d
; d
= d
->next
)
for (i
= 0; i
< d
->n_operands
; i
++)
printf (" %d,", d
->address_p
[i
]);
printf ("\nconst enum machine_mode insn_operand_mode[][MAX_RECOG_OPERANDS] =\n {\n");
for (d
= insn_data
; d
; d
= d
->next
)
for (i
= 0; i
< d
->n_operands
; i
++)
printf (" %smode,", GET_MODE_NAME (d
->modes
[i
]));
printf ("\nconst char insn_operand_strict_low[][MAX_RECOG_OPERANDS] =\n {\n");
for (d
= insn_data
; d
; d
= d
->next
)
for (i
= 0; i
< d
->n_operands
; i
++)
printf (" %d,", d
->strict_low
[i
]);
/* We need to define all predicates used. Keep a list of those we
have defined so far. There normally aren't very many predicates used,
so a linked list should be fast enough. */
struct predicate
{ char *name
; struct predicate
*next
; } *predicates
= 0;
for (d
= insn_data
; d
; d
= d
->next
)
for (i
= 0; i
< d
->n_operands
; i
++)
if (d
->predicates
[i
] && d
->predicates
[i
][0])
for (p
= predicates
; p
; p
= p
->next
)
if (! strcmp (p
->name
, d
->predicates
[i
]))
printf ("extern int %s ();\n", d
->predicates
[i
]);
p
= (struct predicate
*) alloca (sizeof (struct predicate
));
p
->name
= d
->predicates
[i
];
printf ("\nint (*const insn_operand_predicate[][MAX_RECOG_OPERANDS])() =\n {\n");
for (d
= insn_data
; d
; d
= d
->next
)
for (i
= 0; i
< d
->n_operands
; i
++)
printf (" %s,", ((d
->predicates
[i
] && d
->predicates
[i
][0])
? d
->predicates
[i
] : "0"));
printf ("\nconst int insn_n_alternatives[] =\n {\n");
for (d
= insn_data
; d
; d
= d
->next
)
printf (" %d,\n", d
->n_alternatives
);
/* scan_operands (X) stores in max_opno the largest operand
number present in X, if that is larger than the previous
value of max_opno. It stores all the constraints in `constraints'
and all the machine modes in `modes'.
THIS_ADDRESS_P is nonzero if the containing rtx was an ADDRESS.
THIS_STRICT_LOW is nonzero if the containing rtx was a STRICT_LOW_PART. */
static char *constraints
[MAX_MAX_OPERANDS
];
static int op_n_alternatives
[MAX_MAX_OPERANDS
];
static char *predicates
[MAX_MAX_OPERANDS
];
static char address_p
[MAX_MAX_OPERANDS
];
static enum machine_mode modes
[MAX_MAX_OPERANDS
];
static char strict_low
[MAX_MAX_OPERANDS
];
static char seen
[MAX_MAX_OPERANDS
];
scan_operands (part
, this_address_p
, this_strict_low
)
register char *format_ptr
;
if (max_opno
>= MAX_MAX_OPERANDS
)
error ("Too many operands (%d) in definition %d.\n",
max_opno
+ 1, next_index_number
);
error ("Definition %d specified operand number %d more than once.\n",
next_index_number
, opno
);
modes
[opno
] = GET_MODE (part
);
strict_low
[opno
] = this_strict_low
;
predicates
[opno
] = XSTR (part
, 1);
constraints
[opno
] = XSTR (part
, 2);
if (XSTR (part
, 2) != 0 && *XSTR (part
, 2) != 0)
op_n_alternatives
[opno
] = n_occurrences (',', XSTR (part
, 2)) + 1;
address_p
[opno
] = this_address_p
;
if (max_opno
>= MAX_MAX_OPERANDS
)
error ("Too many operands (%d) in definition %d.\n",
max_opno
+ 1, next_index_number
);
error ("Definition %d specified operand number %d more than once.\n",
next_index_number
, opno
);
modes
[opno
] = GET_MODE (part
);
predicates
[opno
] = "scratch_operand";
constraints
[opno
] = XSTR (part
, 1);
if (XSTR (part
, 1) != 0 && *XSTR (part
, 1) != 0)
op_n_alternatives
[opno
] = n_occurrences (',', XSTR (part
, 1)) + 1;
if (max_opno
>= MAX_MAX_OPERANDS
)
error ("Too many operands (%d) in definition %d.\n",
max_opno
+ 1, next_index_number
);
error ("Definition %d specified operand number %d more than once.\n",
next_index_number
, opno
);
modes
[opno
] = GET_MODE (part
);
predicates
[opno
] = XSTR (part
, 1);
for (i
= 0; i
< XVECLEN (part
, 2); i
++)
scan_operands (XVECEXP (part
, 2, i
), 0, 0);
scan_operands (XEXP (part
, 0), 1, 0);
scan_operands (XEXP (part
, 0), 0, 1);
format_ptr
= GET_RTX_FORMAT (GET_CODE (part
));
for (i
= 0; i
< GET_RTX_LENGTH (GET_CODE (part
)); i
++)
scan_operands (XEXP (part
, i
), 0, 0);
if (XVEC (part
, i
) != NULL
)
for (j
= 0; j
< XVECLEN (part
, i
); j
++)
scan_operands (XVECEXP (part
, i
, j
), 0, 0);
/* Process an assembler template from a define_insn or a define_peephole.
It is either the assembler code template, a list of assembler code
templates, or C code to generate the assembler code template. */
process_template (d
, template)
/* We need to consider only the instructions whose assembler code template
starts with a * or @. These are the ones where C code is run to decide
on a template to use. So for all others just return now. */
if (template[0] != '*' && template[0] != '@')
printf ("\nstatic char *\n");
printf ("output_%d (operands, insn)\n", d
->code_number
);
printf (" rtx *operands;\n");
/* If the assembler code template starts with a @ it is a newline-separated
list of assembler code templates, one for each alternative. So produce
a routine to select the correct one. */
printf (" static /*const*/ char *const strings_%d[] = {\n",
for (i
= 0, cp
= &template[1]; *cp
; )
while (*cp
== '\n' || *cp
== ' ' || *cp
== '\t')
while (*cp
!= '\n' && *cp
!= '\0')
printf (" return strings_%d[which_alternative];\n", d
->code_number
);
if (i
!= d
->n_alternatives
)
fatal ("Insn pattern %d has %d alternatives but %d assembler choices",
d
->index_number
, d
->n_alternatives
, i
);
/* The following is done in a funny way to get around problems in
VAX-11 "C" on VMS. It is the equivalent of:
printf ("%s\n", &template[1])); */
while (*cp
) putchar (*cp
++);
/* Check insn D for consistency in number of constraint alternatives. */
validate_insn_alternatives (d
)
register int n
= 0, start
;
/* Make sure all the operands have the same number of
alternatives in their constraints.
for (start
= 0; start
< d
->n_operands
; start
++)
if (d
->op_n_alternatives
[start
] > 0)
n
= d
->op_n_alternatives
[start
];
else if (n
!= d
->op_n_alternatives
[start
])
error ("wrong number of alternatives in operand %d of insn number %d",
/* Record the insn's overall number of alternatives. */
/* Look at a define_insn just read. Assign its code number.
Record on insn_data the template and the number of arguments.
If the insn has a hairy output action, output a function for now. */
register struct data
*d
= (struct data
*) xmalloc (sizeof (struct data
));
d
->code_number
= next_code_number
++;
d
->index_number
= next_index_number
;
d
->name
= XSTR (insn
, 0);
/* Build up the list in the same order as the insns are seen
in the machine description. */
end_of_insn_data
->next
= d
;
mybzero (constraints
, sizeof constraints
);
mybzero (op_n_alternatives
, sizeof op_n_alternatives
);
mybzero (predicates
, sizeof predicates
);
mybzero (address_p
, sizeof address_p
);
mybzero (modes
, sizeof modes
);
mybzero (strict_low
, sizeof strict_low
);
mybzero (seen
, sizeof seen
);
for (i
= 0; i
< XVECLEN (insn
, 1); i
++)
scan_operands (XVECEXP (insn
, 1, i
), 0, 0);
d
->n_operands
= max_opno
+ 1;
mybcopy (constraints
, d
->constraints
, sizeof constraints
);
mybcopy (op_n_alternatives
, d
->op_n_alternatives
, sizeof op_n_alternatives
);
mybcopy (predicates
, d
->predicates
, sizeof predicates
);
mybcopy (address_p
, d
->address_p
, sizeof address_p
);
mybcopy (modes
, d
->modes
, sizeof modes
);
mybcopy (strict_low
, d
->strict_low
, sizeof strict_low
);
validate_insn_alternatives (d
);
process_template (d
, XSTR (insn
, 3));
/* Look at a define_peephole just read. Assign its code number.
Record on insn_data the template and the number of arguments.
If the insn has a hairy output action, output it now. */
register struct data
*d
= (struct data
*) xmalloc (sizeof (struct data
));
d
->code_number
= next_code_number
++;
d
->index_number
= next_index_number
;
/* Build up the list in the same order as the insns are seen
in the machine description. */
end_of_insn_data
->next
= d
;
mybzero (constraints
, sizeof constraints
);
mybzero (op_n_alternatives
, sizeof op_n_alternatives
);
mybzero (predicates
, sizeof predicates
);
mybzero (address_p
, sizeof address_p
);
mybzero (modes
, sizeof modes
);
mybzero (strict_low
, sizeof strict_low
);
mybzero (seen
, sizeof seen
);
/* Get the number of operands by scanning all the
patterns of the peephole optimizer.
But ignore all the rest of the information thus obtained. */
for (i
= 0; i
< XVECLEN (peep
, 0); i
++)
scan_operands (XVECEXP (peep
, 0, i
), 0, 0);
d
->n_operands
= max_opno
+ 1;
mybcopy (constraints
, d
->constraints
, sizeof constraints
);
mybcopy (op_n_alternatives
, d
->op_n_alternatives
, sizeof op_n_alternatives
);
mybzero (d
->predicates
, sizeof predicates
);
mybzero (d
->address_p
, sizeof address_p
);
mybzero (d
->modes
, sizeof modes
);
mybzero (d
->strict_low
, sizeof strict_low
);
validate_insn_alternatives (d
);
process_template (d
, XSTR (peep
, 2));
/* Process a define_expand just read. Assign its code number,
only for the purposes of `insn_gen_function'. */
register struct data
*d
= (struct data
*) xmalloc (sizeof (struct data
));
d
->code_number
= next_code_number
++;
d
->index_number
= next_index_number
;
d
->name
= XSTR (insn
, 0);
/* Build up the list in the same order as the insns are seen
in the machine description. */
end_of_insn_data
->next
= d
;
/* Scan the operands to get the specified predicates and modes,
since expand_binop needs to know them. */
mybzero (constraints
, sizeof constraints
);
mybzero (op_n_alternatives
, sizeof op_n_alternatives
);
mybzero (predicates
, sizeof predicates
);
mybzero (address_p
, sizeof address_p
);
mybzero (modes
, sizeof modes
);
mybzero (strict_low
, sizeof strict_low
);
mybzero (seen
, sizeof seen
);
for (i
= 0; i
< XVECLEN (insn
, 1); i
++)
scan_operands (XVECEXP (insn
, 1, i
), 0, 0);
d
->n_operands
= max_opno
+ 1;
mybcopy (constraints
, d
->constraints
, sizeof constraints
);
mybcopy (op_n_alternatives
, d
->op_n_alternatives
, sizeof op_n_alternatives
);
mybcopy (predicates
, d
->predicates
, sizeof predicates
);
mybcopy (address_p
, d
->address_p
, sizeof address_p
);
mybcopy (modes
, d
->modes
, sizeof modes
);
mybcopy (strict_low
, d
->strict_low
, sizeof strict_low
);
validate_insn_alternatives (d
);
/* Process a define_split just read. Assign its code number,
only for reasons of consistency and to simplify genrecog. */
register struct data
*d
= (struct data
*) xmalloc (sizeof (struct data
));
d
->code_number
= next_code_number
++;
d
->index_number
= next_index_number
;
/* Build up the list in the same order as the insns are seen
in the machine description. */
end_of_insn_data
->next
= d
;
mybzero (constraints
, sizeof constraints
);
mybzero (op_n_alternatives
, sizeof op_n_alternatives
);
mybzero (predicates
, sizeof predicates
);
mybzero (address_p
, sizeof address_p
);
mybzero (modes
, sizeof modes
);
mybzero (strict_low
, sizeof strict_low
);
mybzero (seen
, sizeof seen
);
/* Get the number of operands by scanning all the
patterns of the split patterns.
But ignore all the rest of the information thus obtained. */
for (i
= 0; i
< XVECLEN (split
, 0); i
++)
scan_operands (XVECEXP (split
, 0, i
), 0, 0);
d
->n_operands
= max_opno
+ 1;
mybzero (d
->constraints
, sizeof constraints
);
mybzero (d
->op_n_alternatives
, sizeof op_n_alternatives
);
mybzero (d
->predicates
, sizeof predicates
);
mybzero (d
->address_p
, sizeof address_p
);
mybzero (d
->modes
, sizeof modes
);
mybzero (d
->strict_low
, sizeof strict_low
);
register char *val
= (char *) malloc (size
);
fatal ("virtual memory exhausted");
char *result
= (char *) realloc (ptr
, size
);
fatal ("virtual memory exhausted");
register unsigned length
;
register unsigned length
;
fatal (s
, a1
, a2
, a3
, a4
)
fprintf (stderr
, "genoutput: ");
fprintf (stderr
, s
, a1
, a2
, a3
, a4
);
/* More 'friendly' abort that prints the line and file.
config.h can #define abort fancy_abort if you like that sort of thing. */
fatal ("Internal gcc abort.");
fprintf (stderr
, "genoutput: ");
fprintf (stderr
, s
, a1
, a2
);
obstack_init (rtl_obstack
);
fatal ("No input file name.");
infile
= fopen (argv
[1], "r");
/* Read the machine description. */
c
= read_skip_spaces (infile
);
desc
= read_rtx (infile
);
if (GET_CODE (desc
) == DEFINE_INSN
)
if (GET_CODE (desc
) == DEFINE_PEEPHOLE
)
if (GET_CODE (desc
) == DEFINE_EXPAND
)
if (GET_CODE (desc
) == DEFINE_SPLIT
)
exit (ferror (stdout
) != 0 ? FATAL_EXIT_CODE
: SUCCESS_EXIT_CODE
);