a4cd5630b0
non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
295 lines
6.6 KiB
C
295 lines
6.6 KiB
C
/* Generate from machine description:
|
||
|
||
- some flags HAVE_... saying which simple standard instructions are
|
||
available for this machine.
|
||
Copyright (C) 1987, 1991, 1995 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. */
|
||
|
||
|
||
#include <stdio.h>
|
||
#include "hconfig.h"
|
||
#include "rtl.h"
|
||
#include "obstack.h"
|
||
|
||
static struct obstack obstack;
|
||
struct obstack *rtl_obstack = &obstack;
|
||
|
||
#define obstack_chunk_alloc xmalloc
|
||
#define obstack_chunk_free free
|
||
|
||
extern void free ();
|
||
extern rtx read_rtx ();
|
||
|
||
char *xmalloc ();
|
||
static void fatal ();
|
||
void fancy_abort ();
|
||
|
||
/* Names for patterns. Need to allow linking with print-rtl. */
|
||
char **insn_name_ptr;
|
||
|
||
/* Obstacks to remember normal, and call insns. */
|
||
static struct obstack call_obstack, normal_obstack;
|
||
|
||
/* Max size of names encountered. */
|
||
static int max_id_len;
|
||
|
||
/* Count the number of match_operand's found. */
|
||
static int
|
||
num_operands (x)
|
||
rtx x;
|
||
{
|
||
int count = 0;
|
||
int i, j;
|
||
enum rtx_code code = GET_CODE (x);
|
||
char *format_ptr = GET_RTX_FORMAT (code);
|
||
|
||
if (code == MATCH_OPERAND)
|
||
return 1;
|
||
|
||
if (code == MATCH_OPERATOR || code == MATCH_PARALLEL)
|
||
count++;
|
||
|
||
for (i = 0; i < GET_RTX_LENGTH (code); i++)
|
||
{
|
||
switch (*format_ptr++)
|
||
{
|
||
case 'u':
|
||
case 'e':
|
||
count += num_operands (XEXP (x, i));
|
||
break;
|
||
|
||
case 'E':
|
||
if (XVEC (x, i) != NULL)
|
||
for (j = 0; j < XVECLEN (x, i); j++)
|
||
count += num_operands (XVECEXP (x, i, j));
|
||
|
||
break;
|
||
}
|
||
}
|
||
|
||
return count;
|
||
}
|
||
|
||
/* Print out prototype information for a function. */
|
||
static void
|
||
gen_proto (insn)
|
||
rtx insn;
|
||
{
|
||
int num = num_operands (insn);
|
||
printf ("extern rtx gen_%-*s PROTO((", max_id_len, XSTR (insn, 0));
|
||
|
||
if (num == 0)
|
||
printf ("void");
|
||
else
|
||
{
|
||
while (num-- > 1)
|
||
printf ("rtx, ");
|
||
|
||
printf ("rtx");
|
||
}
|
||
|
||
printf ("));\n");
|
||
}
|
||
|
||
/* Print out a function declaration without a prototype. */
|
||
static void
|
||
gen_nonproto (insn)
|
||
rtx insn;
|
||
{
|
||
printf ("extern rtx gen_%s ();\n", XSTR (insn, 0));
|
||
}
|
||
|
||
static void
|
||
gen_insn (insn)
|
||
rtx insn;
|
||
{
|
||
char *name = XSTR (insn, 0);
|
||
char *p;
|
||
struct obstack *obstack_ptr;
|
||
int len;
|
||
|
||
/* Don't mention instructions whose names are the null string
|
||
or begin with '*'. They are in the machine description just
|
||
to be recognized. */
|
||
if (name[0] == 0 || name[0] == '*')
|
||
return;
|
||
|
||
len = strlen (name);
|
||
|
||
if (len > max_id_len)
|
||
max_id_len = len;
|
||
|
||
printf ("#define HAVE_%s ", name);
|
||
if (strlen (XSTR (insn, 2)) == 0)
|
||
printf ("1\n");
|
||
else
|
||
{
|
||
/* Write the macro definition, putting \'s at the end of each line,
|
||
if more than one. */
|
||
printf ("(");
|
||
for (p = XSTR (insn, 2); *p; p++)
|
||
{
|
||
if (*p == '\n')
|
||
printf (" \\\n");
|
||
else
|
||
printf ("%c", *p);
|
||
}
|
||
printf (")\n");
|
||
}
|
||
|
||
/* Save the current insn, so that we can later put out appropriate
|
||
prototypes. At present, most md files have the wrong number of
|
||
arguments for the call insns (call, call_value, call_pop,
|
||
call_value_pop) ignoring the extra arguments that are passed for
|
||
some machines, so by default, turn off the prototype. */
|
||
|
||
obstack_ptr = (name[0] == 'c'
|
||
&& (!strcmp (name, "call")
|
||
|| !strcmp (name, "call_value")
|
||
|| !strcmp (name, "call_pop")
|
||
|| !strcmp (name, "call_value_pop")))
|
||
? &call_obstack : &normal_obstack;
|
||
|
||
obstack_grow (obstack_ptr, &insn, sizeof (rtx));
|
||
}
|
||
|
||
char *
|
||
xmalloc (size)
|
||
unsigned size;
|
||
{
|
||
register char *val = (char *) malloc (size);
|
||
|
||
if (val == 0)
|
||
fatal ("virtual memory exhausted");
|
||
|
||
return val;
|
||
}
|
||
|
||
char *
|
||
xrealloc (ptr, size)
|
||
char *ptr;
|
||
unsigned size;
|
||
{
|
||
char *result = (char *) realloc (ptr, size);
|
||
if (!result)
|
||
fatal ("virtual memory exhausted");
|
||
return result;
|
||
}
|
||
|
||
static void
|
||
fatal (s, a1, a2)
|
||
char *s;
|
||
{
|
||
fprintf (stderr, "genflags: ");
|
||
fprintf (stderr, s, a1, a2);
|
||
fprintf (stderr, "\n");
|
||
exit (FATAL_EXIT_CODE);
|
||
}
|
||
|
||
/* More 'friendly' abort that prints the line and file.
|
||
config.h can #define abort fancy_abort if you like that sort of thing. */
|
||
|
||
void
|
||
fancy_abort ()
|
||
{
|
||
fatal ("Internal gcc abort.");
|
||
}
|
||
|
||
int
|
||
main (argc, argv)
|
||
int argc;
|
||
char **argv;
|
||
{
|
||
rtx desc;
|
||
rtx dummy;
|
||
rtx *call_insns;
|
||
rtx *normal_insns;
|
||
rtx *insn_ptr;
|
||
FILE *infile;
|
||
register int c;
|
||
|
||
obstack_init (rtl_obstack);
|
||
obstack_init (&call_obstack);
|
||
obstack_init (&normal_obstack);
|
||
|
||
if (argc <= 1)
|
||
fatal ("No input file name.");
|
||
|
||
infile = fopen (argv[1], "r");
|
||
if (infile == 0)
|
||
{
|
||
perror (argv[1]);
|
||
exit (FATAL_EXIT_CODE);
|
||
}
|
||
|
||
init_rtl ();
|
||
|
||
printf ("/* Generated automatically by the program `genflags'\n\
|
||
from the machine description file `md'. */\n\n");
|
||
|
||
/* Read the machine description. */
|
||
|
||
while (1)
|
||
{
|
||
c = read_skip_spaces (infile);
|
||
if (c == EOF)
|
||
break;
|
||
ungetc (c, infile);
|
||
|
||
desc = read_rtx (infile);
|
||
if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
|
||
gen_insn (desc);
|
||
}
|
||
|
||
/* Print out the prototypes now. */
|
||
dummy = (rtx)0;
|
||
obstack_grow (&call_obstack, &dummy, sizeof (rtx));
|
||
call_insns = (rtx *) obstack_finish (&call_obstack);
|
||
|
||
obstack_grow (&normal_obstack, &dummy, sizeof (rtx));
|
||
normal_insns = (rtx *) obstack_finish (&normal_obstack);
|
||
|
||
printf ("\n#ifndef NO_MD_PROTOTYPES\n");
|
||
for (insn_ptr = normal_insns; *insn_ptr; insn_ptr++)
|
||
gen_proto (*insn_ptr);
|
||
|
||
printf ("\n#ifdef MD_CALL_PROTOTYPES\n");
|
||
for (insn_ptr = call_insns; *insn_ptr; insn_ptr++)
|
||
gen_proto (*insn_ptr);
|
||
|
||
printf ("\n#else /* !MD_CALL_PROTOTYPES */\n");
|
||
for (insn_ptr = call_insns; *insn_ptr; insn_ptr++)
|
||
gen_nonproto (*insn_ptr);
|
||
|
||
printf ("#endif /* !MD_CALL_PROTOTYPES */\n");
|
||
printf ("\n#else /* NO_MD_PROTOTYPES */\n");
|
||
for (insn_ptr = normal_insns; *insn_ptr; insn_ptr++)
|
||
gen_nonproto (*insn_ptr);
|
||
|
||
for (insn_ptr = call_insns; *insn_ptr; insn_ptr++)
|
||
gen_nonproto (*insn_ptr);
|
||
|
||
printf ("#endif /* NO_MD_PROTOTYPES */\n");
|
||
|
||
fflush (stdout);
|
||
exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
|
||
/* NOTREACHED */
|
||
return 0;
|
||
}
|