Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 155 insertions, 0 deletions

diff --git a/sim/ppc/ld-decode.c b/sim/ppc/ld-decode.c
new file mode 100644
index 0000000..3964960
--- /dev/null
+++ b/sim/ppc/ld-decode.c
@@ -0,0 +1,155 @@
+/*  This file is part of the program psim.
+
+    Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au>
+
+    This program 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 of the License, or
+    (at your option) any later version.
+
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ 
+    */
+
+/* load the opcode stat structure */
+
+#include "misc.h"
+#include "lf.h"
+#include "table.h"
+#include "ld-decode.h"
+
+#ifndef NULL
+#define NULL 0
+#endif
+
+enum {
+  op_options,
+  op_first,
+  op_last,
+  op_force_first,
+  op_force_last,
+  op_force_expansion,
+  op_special_mask,
+  op_special_value,
+  op_special_constant,
+  nr_decode_fields,
+};
+
+static const name_map decode_type_map[] = {
+  { "normal", normal_decode_rule },
+  { "expand-forced", expand_forced_rule },
+  { "boolean", boolean_rule },
+  { NULL, normal_decode_rule },
+};
+
+static const name_map decode_gen_map[] = {
+  { "array", array_gen },
+  { "switch", switch_gen },
+  { "padded-switch", padded_switch_gen },
+  { "goto-switch", goto_switch_gen },
+  { NULL, -1 },
+};
+
+static const name_map decode_slash_map[] = {
+  { "variable-slash", 0 },
+  { "constant-slash", 1 },
+  { NULL },
+};
+
+
+static decode_gen_type overriding_gen_type = invalid_gen;
+
+void
+force_decode_gen_type(const char *type)
+{
+  overriding_gen_type = name2i(type, decode_gen_map);
+}
+
+
+decode_table *
+load_decode_table(char *file_name,
+		  int hi_bit_nr)
+{
+  table *file = table_open(file_name, nr_decode_fields, 0);
+  table_entry *entry;
+  decode_table *table = NULL;
+  decode_table **curr_rule = &table;
+  while ((entry = table_entry_read(file)) != NULL) {
+    decode_table *new_rule = ZALLOC(decode_table);
+    new_rule->type = name2i(entry->fields[op_options], decode_type_map);
+    new_rule->gen = (overriding_gen_type != invalid_gen
+		     ? overriding_gen_type
+		     : name2i(entry->fields[op_options], decode_gen_map));
+    new_rule->force_slash = name2i(entry->fields[op_options], decode_slash_map);
+    new_rule->first = target_a2i(hi_bit_nr, entry->fields[op_first]);
+    new_rule->last = target_a2i(hi_bit_nr, entry->fields[op_last]);
+    new_rule->force_first = (strlen(entry->fields[op_force_first])
+			     ? target_a2i(hi_bit_nr, entry->fields[op_force_first])
+			     : new_rule->last + 1);
+    new_rule->force_last = (strlen(entry->fields[op_force_last])
+			    ? target_a2i(hi_bit_nr, entry->fields[op_force_last])
+			    : new_rule->first - 1);
+    new_rule->force_expansion = entry->fields[op_force_expansion];
+    new_rule->special_mask = a2i(entry->fields[op_special_mask]);
+    new_rule->special_value = a2i(entry->fields[op_special_value]);
+    new_rule->special_constant = a2i(entry->fields[op_special_constant]);
+    *curr_rule = new_rule;
+    curr_rule = &new_rule->next;
+  }
+  return table;
+}
+
+  
+void
+dump_decode_rule(decode_table *rule,
+		 int indent)
+{
+  dumpf(indent, "((decode_table*)%p\n", rule);
+  if (rule) {
+    dumpf(indent, " (type %s)\n", i2name(rule->type, decode_type_map));
+    dumpf(indent, " (gen %s)\n", i2name(rule->gen, decode_gen_map));
+    dumpf(indent, " (force_slash %d)\n", rule->force_slash);
+    dumpf(indent, " (first %d)\n", rule->first);
+    dumpf(indent, " (last %d)\n", rule->last);
+    dumpf(indent, " (force_first %d)\n", rule->force_first);
+    dumpf(indent, " (force_last %d)\n", rule->force_last);
+    dumpf(indent, " (force_expansion \"%s\")\n", rule->force_expansion);
+    dumpf(indent, " (special_mask 0x%x)\n", rule->special_mask);
+    dumpf(indent, " (special_value 0x%x)\n", rule->special_value);
+    dumpf(indent, " (special_constant 0x%x)\n", rule->special_constant);
+    dumpf(indent, " (next 0x%x)\n", rule->next);
+  }
+  dumpf(indent, " )\n");
+}
+
+
+#ifdef MAIN
+
+static void
+dump_decode_rules(decode_table *rule,
+		  int indent)
+{
+  while (rule) {
+    dump_decode_rule(rule, indent);
+    rule = rule->next;
+  }
+}
+
+int
+main(int argc, char **argv)
+{
+  decode_table *rules;
+  if (argc != 3)
+    error("Usage: decode <decode-file> <hi-bit-nr>\n");
+  rules = load_decode_table(argv[1], a2i(argv[2]));
+  dump_decode_rules(rules, 0);
+  return 0;
+}
+#endif