183 lines
4.5 KiB
C
Executable File
183 lines
4.5 KiB
C
Executable File
/* Generate attribute information (insn-attr.h) from machine description.
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Copyright (C) 1991, 1994, 1996, 1998, 1999 Free Software Foundation, Inc.
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Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu)
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "config.h"
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#include "system.h"
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#include "rtl.h"
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#include "obstack.h"
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#define obstack_chunk_alloc xmalloc
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#define obstack_chunk_free free
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static struct obstack obstack;
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struct obstack *rtl_obstack = &obstack;
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/* Define this so we can link with print-rtl.o to get debug_rtx function. */
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char **insn_name_ptr = 0;
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static void write_upcase (char *);
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static void gen_attr (rtx);
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static void
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write_upcase (char *str)
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{
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for (; *str; str++)
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if (*str >= 'a' && *str <= 'z')
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printf ("%c", *str - 'a' + 'A');
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else
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printf ("%c", *str);
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}
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static void
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gen_attr (rtx attr)
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{
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char *p;
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printf ("#define HAVE_ATTR_%s\n", XSTR (attr, 0));
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/* If numeric attribute, don't need to write an enum. */
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if (*XSTR (attr, 1) == '\0')
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printf ("extern int get_attr_%s ();\n", XSTR (attr, 0));
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else
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{
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printf ("enum attr_%s {", XSTR (attr, 0));
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write_upcase (XSTR (attr, 0));
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printf ("_");
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for (p = XSTR (attr, 1); *p != '\0'; p++)
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{
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if (*p == ',')
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{
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printf (", ");
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write_upcase (XSTR (attr, 0));
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printf ("_");
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}
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else if (*p >= 'a' && *p <= 'z')
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printf ("%c", *p - 'a' + 'A');
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else
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printf ("%c", *p);
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}
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printf ("};\n");
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printf ("extern enum attr_%s get_attr_%s ();\n\n",
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XSTR (attr, 0), XSTR (attr, 0));
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}
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/* If `length' attribute, write additional function definitions and define
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variables used by `insn_current_length'. */
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if (! strcmp (XSTR (attr, 0), "length"))
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{
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printf ("extern void init_lengths ();\n");
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printf ("extern void shorten_branches (rtx);\n");
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printf ("extern int insn_default_length (rtx);\n");
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printf ("extern int insn_variable_length_p (rtx);\n");
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printf ("extern int insn_current_length (rtx);\n\n");
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printf ("extern int *insn_addresses;\n");
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printf ("extern int insn_current_address;\n\n");
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}
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}
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static void
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fatal(const char *format, ...)
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{
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va_list ap;
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va_start (ap, format);
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fprintf (stderr, "genattr: ");
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vfprintf (stderr, format, ap);
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va_end (ap);
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fprintf (stderr, "\n");
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exit (EXIT_FAILURE);
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}
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void *
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xmalloc(size_t size)
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{
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void *val = malloc(size);
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if (val == NULL)
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fatal ("virtual memory exhausted");
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return val;
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}
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int
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main(int argc, char **argv)
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{
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rtx desc;
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FILE *infile;
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int c;
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obstack_init (rtl_obstack);
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if (argc <= 1)
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fatal ("No input file name.");
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infile = fopen (argv[1], "r");
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if (infile == 0)
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{
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perror (argv[1]);
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exit (EXIT_FAILURE);
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}
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init_rtl ();
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printf ("/* Generated automatically by the program `genattr'\n\
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from the machine description file `md'. */\n\n");
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/* For compatibility, define the attribute `alternative', which is just
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a reference to the variable `which_alternative'. */
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printf ("#define HAVE_ATTR_alternative\n");
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printf ("#define get_attr_alternative(insn) which_alternative\n");
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/* Read the machine description. */
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while (1)
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{
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c = read_skip_spaces (infile);
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if (c == EOF)
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break;
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ungetc (c, infile);
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desc = read_rtx (infile);
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if (GET_CODE (desc) == DEFINE_ATTR)
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gen_attr (desc);
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}
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/* Output flag masks for use by reorg.
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Flags are used to hold branch direction and prediction information
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for use by eligible_for_... */
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printf("\n#define ATTR_FLAG_forward\t0x1\n");
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printf("#define ATTR_FLAG_backward\t0x2\n");
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printf("#define ATTR_FLAG_likely\t0x4\n");
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printf("#define ATTR_FLAG_very_likely\t0x8\n");
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printf("#define ATTR_FLAG_unlikely\t0x10\n");
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printf("#define ATTR_FLAG_very_unlikely\t0x20\n");
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fflush (stdout);
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exit (ferror (stdout) != 0 ? EXIT_FAILURE : EXIT_SUCCESS);
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/* NOTREACHED */
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return 0;
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}
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