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/* Generate attribute information (insn-attr.h) from machine description.
Copyright (C) 1991, 1994, 1996, 1998, 1999 Free Software Foundation, Inc.
Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu)
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 "config.h"
#include "system.h"
#include "rtl.h"
#include "obstack.h"
#define obstack_chunk_alloc xmalloc
#define obstack_chunk_free free
static struct obstack obstack;
struct obstack *rtl_obstack = &obstack;
/* Define this so we can link with print-rtl.o to get debug_rtx function. */
char **insn_name_ptr = 0;
static void write_upcase (char *);
static void gen_attr (rtx);
static void
write_upcase (char *str)
{
for (; *str; str++)
if (*str >= 'a' && *str <= 'z')
printf ("%c", *str - 'a' + 'A');
else
printf ("%c", *str);
}
static void
gen_attr (rtx attr)
{
char *p;
printf ("#define HAVE_ATTR_%s\n", XSTR (attr, 0));
/* If numeric attribute, don't need to write an enum. */
if (*XSTR (attr, 1) == '\0')
printf ("extern int get_attr_%s ();\n", XSTR (attr, 0));
else
{
printf ("enum attr_%s {", XSTR (attr, 0));
write_upcase (XSTR (attr, 0));
printf ("_");
for (p = XSTR (attr, 1); *p != '\0'; p++)
{
if (*p == ',')
{
printf (", ");
write_upcase (XSTR (attr, 0));
printf ("_");
}
else if (*p >= 'a' && *p <= 'z')
printf ("%c", *p - 'a' + 'A');
else
printf ("%c", *p);
}
printf ("};\n");
printf ("extern enum attr_%s get_attr_%s ();\n\n",
XSTR (attr, 0), XSTR (attr, 0));
}
/* If `length' attribute, write additional function definitions and define
variables used by `insn_current_length'. */
if (! strcmp (XSTR (attr, 0), "length"))
{
printf ("extern void init_lengths ();\n");
printf ("extern void shorten_branches (rtx);\n");
printf ("extern int insn_default_length (rtx);\n");
printf ("extern int insn_variable_length_p (rtx);\n");
printf ("extern int insn_current_length (rtx);\n\n");
printf ("extern int *insn_addresses;\n");
printf ("extern int insn_current_address;\n\n");
}
}
static void
fatal(const char *format, ...)
{
va_list ap;
va_start (ap, format);
fprintf (stderr, "genattr: ");
vfprintf (stderr, format, ap);
va_end (ap);
fprintf (stderr, "\n");
exit (EXIT_FAILURE);
}
void *
xmalloc(size_t size)
{
void *val = malloc(size);
if (val == NULL)
fatal ("virtual memory exhausted");
return val;
}
int
main(int argc, char **argv)
{
rtx desc;
FILE *infile;
int c;
obstack_init (rtl_obstack);
if (argc <= 1)
fatal ("No input file name.");
infile = fopen (argv[1], "r");
if (infile == 0)
{
perror (argv[1]);
exit (EXIT_FAILURE);
}
init_rtl ();
printf ("/* Generated automatically by the program `genattr'\n\
from the machine description file `md'. */\n\n");
/* For compatibility, define the attribute `alternative', which is just
a reference to the variable `which_alternative'. */
printf ("#define HAVE_ATTR_alternative\n");
printf ("#define get_attr_alternative(insn) which_alternative\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_ATTR)
gen_attr (desc);
}
/* Output flag masks for use by reorg.
Flags are used to hold branch direction and prediction information
for use by eligible_for_... */
printf("\n#define ATTR_FLAG_forward\t0x1\n");
printf("#define ATTR_FLAG_backward\t0x2\n");
printf("#define ATTR_FLAG_likely\t0x4\n");
printf("#define ATTR_FLAG_very_likely\t0x8\n");
printf("#define ATTR_FLAG_unlikely\t0x10\n");
printf("#define ATTR_FLAG_very_unlikely\t0x20\n");
fflush (stdout);
exit (ferror (stdout) != 0 ? EXIT_FAILURE : EXIT_SUCCESS);
/* NOTREACHED */
return 0;
}
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