Initial revision

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@47 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 159 insertions, 0 deletions

diff --git a/gcc/gencodes.c b/gcc/gencodes.c
new file mode 100644
index 00000000000..4d06b80dbdf
--- /dev/null
+++ b/gcc/gencodes.c
@@ -0,0 +1,159 @@
+/* Generate from machine description:
+
+   - some macros CODE_FOR_... giving the insn_code_number value
+   for each of the defined standard insn names.
+   Copyright (C) 1987 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+
+#include <stdio.h>
+#include "config.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 ();
+
+char *xmalloc ();
+static void fatal ();
+void fancy_abort ();
+
+static int insn_code_number;
+
+static void
+gen_insn (insn)
+     rtx insn;
+{
+  /* Don't mention instructions whose names are the null string.
+     They are in the machine description just to be recognized.  */
+  if (strlen (XSTR (insn, 0)) != 0)
+    printf ("  CODE_FOR_%s = %d,\n", XSTR (insn, 0),
+	    insn_code_number);
+}
+
+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, "gencodes: ");
+  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;
+  FILE *infile;
+  extern rtx read_rtx ();
+  register 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 (FATAL_EXIT_CODE);
+    }
+
+  init_rtl ();
+
+  printf ("/* Generated automatically by the program `gencodes'\n\
+from the machine description file `md'.  */\n\n");
+
+  printf ("#ifndef MAX_INSN_CODE\n\n");
+
+  /* Read the machine description.  */
+
+  insn_code_number = 0;
+  printf ("enum insn_code {\n");
+
+  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);
+	  insn_code_number++;
+	}
+      if (GET_CODE (desc) == DEFINE_PEEPHOLE
+	  || GET_CODE (desc) == DEFINE_SPLIT)
+	{
+	  insn_code_number++;
+	}
+    }
+
+  printf ("  CODE_FOR_nothing };\n");
+
+  printf ("\n#define MAX_INSN_CODE ((int) CODE_FOR_nothing)\n");
+
+  printf ("#endif /* MAX_INSN_CODE */\n");
+
+  fflush (stdout);
+  exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
+  /* NOTREACHED */
+  return 0;
+}