diff options
Diffstat (limited to 'sim/ppc/ld-decode.c')
| -rw-r--r-- | sim/ppc/ld-decode.c | 155 |
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 00000000000..3964960af26 --- /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 |