#include "misc.h"
#include "lf.h"
#include "table.h"
#include "filter.h"
#include "igen.h"
#include "ld-insn.h"
#include "ld-decode.h"
#include "gen.h"
#include "gen-idecode.h"
#include "gen-icache.h"
#include "gen-semantics.h"
static void
lf_print_opcodes (lf *file, gen_entry *table)
{
if (table !=NULL)
{
while (1)
{
ASSERT (table->opcode != NULL);
lf_printf (file, "_%d_%d",
table->opcode->first, table->opcode->last);
if (table->parent == NULL)
break;
lf_printf (file, "__%d", table->opcode_nr);
table = table->parent;
}
}
}
static void
print_idecode_ifetch (lf *file,
int previous_nr_prefetched_words,
int current_nr_prefetched_words)
{
int word_nr;
for (word_nr = previous_nr_prefetched_words;
word_nr < current_nr_prefetched_words; word_nr++)
{
lf_printf (file,
"instruction_word instruction_%d = IMEM%d_IMMED (cia, %d);\n",
word_nr, options.insn_bit_size, word_nr);
}
}
static void
lf_print_table_name (lf *file, gen_entry *table)
{
lf_printf (file, "idecode_table");
lf_print_opcodes (file, table);
}
static void
print_idecode_table (lf *file, gen_entry *entry, const char *result)
{
lf_printf (file, "/* prime the search */\n");
lf_printf (file, "idecode_table_entry *table = ");
lf_print_table_name (file, entry);
lf_printf (file, ";\n");
lf_printf (file, "int opcode = EXTRACTED%d (instruction, %d, %d);\n",
options.insn_bit_size,
i2target (options.hi_bit_nr, entry->opcode->first),
i2target (options.hi_bit_nr, entry->opcode->last));
lf_printf (file, "idecode_table_entry *table_entry = table + opcode;\n");
lf_printf (file, "\n");
lf_printf (file, "/* iterate until a leaf */\n");
lf_printf (file, "while (1) {\n");
lf_printf (file, " signed shift = table_entry->shift;\n");
lf_printf (file, "if (shift == function_entry) break;\n");
lf_printf (file, " if (shift >= 0) {\n");
lf_printf (file, " table = ((idecode_table_entry*)\n");
lf_printf (file, " table_entry->function_or_table);\n");
lf_printf (file, " opcode = ((instruction & table_entry->mask)\n");
lf_printf (file, " >> shift);\n");
lf_printf (file, " table_entry = table + opcode;\n");
lf_printf (file, " }\n");
lf_printf (file, " else {\n");
lf_printf (file, " /* must be a boolean */\n");
lf_printf (file, " ASSERT(table_entry->shift == boolean_entry);\n");
lf_printf (file, " opcode = ((instruction & table_entry->mask)\n");
lf_printf (file, " != table_entry->value);\n");
lf_printf (file, " table = ((idecode_table_entry*)\n");
lf_printf (file, " table_entry->function_or_table);\n");
lf_printf (file, " table_entry = table + opcode;\n");
lf_printf (file, " }\n");
lf_printf (file, "}\n");
lf_printf (file, "\n");
lf_printf (file, "/* call the leaf code */\n");
if (options.gen.code == generate_jumps)
{
lf_printf (file, "goto *table_entry->function_or_table;\n");
}
else
{
lf_printf (file, "%s ", result);
if (options.gen.icache)
{
lf_printf (file,
"(((idecode_icache*)table_entry->function_or_table)\n");
lf_printf (file, " (");
print_icache_function_actual (file, 1);
lf_printf (file, "));\n");
}
else
{
lf_printf (file,
"((idecode_semantic*)table_entry->function_or_table)\n");
lf_printf (file, " (");
print_semantic_function_actual (file, 1);
lf_printf (file, ");\n");
}
}
}
static void
print_idecode_table_start (lf *file, gen_entry *table, int depth, void *data)
{
ASSERT (depth == 0);
if (table->opcode_rule->gen == array_gen)
{
lf_printf (file, "\n");
lf_printf (file, "static idecode_table_entry ");
lf_print_table_name (file, table);
lf_printf (file, "[] = {\n");
}
}
static void
print_idecode_table_leaf (lf *file, gen_entry *entry, int depth, void *data)
{
gen_entry *master_entry;
ASSERT (entry->parent != NULL);
ASSERT (depth == 0);
if (entry->combined_parent == NULL)
master_entry = entry;
else
master_entry = entry->combined_parent;
if (entry->parent->opcode_rule->gen == array_gen)
{
lf_printf (file, " /*%d*/ { ", entry->opcode_nr);
if (entry->opcode == NULL)
{
ASSERT (entry->nr_insns == 1);
lf_printf (file, "function_entry, 0, 0, ");
if (options.gen.code == generate_jumps)
{
lf_printf (file, "&&");
}
print_function_name (file,
entry->insns->insn->name,
entry->insns->insn->format_name,
NULL,
master_entry->expanded_bits,
(options.gen.icache
? function_name_prefix_icache
: function_name_prefix_semantics));
}
else if (entry->opcode_rule->gen == switch_gen
|| entry->opcode_rule->gen == goto_switch_gen
|| entry->opcode_rule->gen == padded_switch_gen)
{
lf_printf (file, "function_entry, 0, 0, ");
if (options.gen.code == generate_jumps)
{
lf_printf (file, "&&");
}
lf_print_table_name (file, entry);
}
else if (entry->opcode->is_boolean)
{
lf_printf (file, "boolean_entry, ");
lf_printf (file, "MASK32(%d, %d), ",
i2target (options.hi_bit_nr, entry->opcode->first),
i2target (options.hi_bit_nr, entry->opcode->last));
lf_printf (file, "INSERTED32(%d, %d, %d), ",
entry->opcode->boolean_constant,
i2target (options.hi_bit_nr, entry->opcode->first),
i2target (options.hi_bit_nr, entry->opcode->last));
lf_print_table_name (file, entry);
}
else
{
lf_printf (file, "%d, ",
options.insn_bit_size - entry->opcode->last - 1);
lf_printf (file, "MASK%d(%d,%d), ", options.insn_bit_size,
i2target (options.hi_bit_nr, entry->opcode->first),
i2target (options.hi_bit_nr, entry->opcode->last));
lf_printf (file, "0, ");
lf_print_table_name (file, entry);
}
lf_printf (file, " },\n");
}
}
static void
print_idecode_table_end (lf *file, gen_entry *table, int depth, void *data)
{
ASSERT (depth == 0);
if (table->opcode_rule->gen == array_gen)
{
lf_printf (file, "};\n");
}
}
static void
print_goto_switch_name (lf *file, gen_entry *entry)
{
lf_printf (file, "case_");
if (entry->opcode == NULL)
{
print_function_name (file,
entry->insns->insn->name,
entry->insns->insn->format_name,
NULL,
entry->expanded_bits,
(options.gen.icache
? function_name_prefix_icache
: function_name_prefix_semantics));
}
else
{
lf_print_table_name (file, entry);
}
}
static void
print_goto_switch_table_leaf (lf *file,
gen_entry *entry, int depth, void *data)
{
ASSERT (entry->parent != NULL);
ASSERT (depth == 0);
ASSERT (entry->parent->opcode_rule->gen == goto_switch_gen);
ASSERT (entry->parent->opcode);
lf_printf (file, "/* %d */ &&", entry->opcode_nr);
if (entry->combined_parent != NULL)
print_goto_switch_name (file, entry->combined_parent);
else
print_goto_switch_name (file, entry);
lf_printf (file, ",\n");
}
static void
print_goto_switch_break (lf *file, gen_entry *entry)
{
lf_printf (file, "goto break_");
lf_print_table_name (file, entry->parent);
lf_printf (file, ";\n");
}
static void
print_goto_switch_table (lf *file, gen_entry *table)
{
lf_printf (file, "const static void *");
lf_print_table_name (file, table);
lf_printf (file, "[] = {\n");
lf_indent (file, +2);
gen_entry_traverse_tree (file, table, 0, NULL ,
print_goto_switch_table_leaf, NULL ,
NULL );
lf_indent (file, -2);
lf_printf (file, "};\n");
}
void print_idecode_switch (lf *file, gen_entry *table, const char *result);
static void
print_idecode_switch_start (lf *file, gen_entry *table, int depth, void *data)
{
ASSERT (depth == 0);
ASSERT (table->opcode_rule->gen == switch_gen
|| table->opcode_rule->gen == goto_switch_gen
|| table->opcode_rule->gen == padded_switch_gen);
if (table->opcode->is_boolean
|| table->opcode_rule->gen == switch_gen
|| table->opcode_rule->gen == padded_switch_gen)
{
lf_printf (file, "switch (EXTRACTED%d (instruction_%d, %d, %d))\n",
options.insn_bit_size,
table->opcode_rule->word_nr,
i2target (options.hi_bit_nr, table->opcode->first),
i2target (options.hi_bit_nr, table->opcode->last));
lf_indent (file, +2);
lf_printf (file, "{\n");
}
else if (table->opcode_rule->gen == goto_switch_gen)
{
if (table->parent != NULL
&& (table->parent->opcode_rule->gen == switch_gen
|| table->parent->opcode_rule->gen == goto_switch_gen
|| table->parent->opcode_rule->gen == padded_switch_gen))
{
lf_printf (file, "{\n");
lf_indent (file, +2);
}
print_goto_switch_table (file, table);
lf_printf (file, "ASSERT (EXTRACTED%d (instruction_%d, %d, %d)\n",
options.insn_bit_size,
table->opcode->word_nr,
i2target (options.hi_bit_nr, table->opcode->first),
i2target (options.hi_bit_nr, table->opcode->last));
lf_printf (file, " < (sizeof (");
lf_print_table_name (file, table);
lf_printf (file, ") / sizeof(void*)));\n");
lf_printf (file, "goto *");
lf_print_table_name (file, table);
lf_printf (file, "[EXTRACTED%d (instruction_%d, %d, %d)];\n",
options.insn_bit_size,
table->opcode->word_nr,
i2target (options.hi_bit_nr, table->opcode->first),
i2target (options.hi_bit_nr, table->opcode->last));
}
else
{
ASSERT ("bad switch" == NULL);
}
}
static void
print_idecode_switch_leaf (lf *file, gen_entry *entry, int depth, void *data)
{
const char *result = data;
ASSERT (entry->parent != NULL);
ASSERT (depth == 0);
ASSERT (entry->parent->opcode_rule->gen == switch_gen
|| entry->parent->opcode_rule->gen == goto_switch_gen
|| entry->parent->opcode_rule->gen == padded_switch_gen);
ASSERT (entry->parent->opcode);
if (entry->combined_parent != NULL)
return;
if (entry->parent->opcode->is_boolean && entry->opcode_nr == 0)
{
lf_printf (file, "case %d:\n", entry->parent->opcode->boolean_constant);
}
else if (entry->parent->opcode->is_boolean && entry->opcode_nr != 0)
{
lf_printf (file, "default:\n");
}
else if (entry->parent->opcode_rule->gen == switch_gen
|| entry->parent->opcode_rule->gen == padded_switch_gen)
{
gen_entry *cob;
for (cob = entry; cob != NULL; cob = cob->combined_next)
lf_printf (file, "case %d:\n", cob->opcode_nr);
}
else if (entry->parent->opcode_rule->gen == goto_switch_gen)
{
print_goto_switch_name (file, entry);
lf_printf (file, ":\n");
}
else
{
ERROR ("bad switch");
}
lf_printf (file, " {\n");
lf_indent (file, +4);
{
if (entry->opcode == NULL)
{
ASSERT (entry->nr_insns == 1);
print_idecode_ifetch (file, entry->nr_prefetched_words,
entry->insns->semantic->nr_prefetched_words);
switch (options.gen.code)
{
case generate_jumps:
lf_printf (file, "goto ");
break;
case generate_calls:
lf_printf (file, "%s", result);
break;
}
print_function_name (file,
entry->insns->insn->name,
entry->insns->insn->format_name,
NULL,
entry->expanded_bits,
(options.gen.icache
? function_name_prefix_icache
: function_name_prefix_semantics));
if (options.gen.code == generate_calls)
{
lf_printf (file, " (");
print_semantic_function_actual (file,
entry->insns->semantic->
nr_prefetched_words);
lf_printf (file, ")");
}
lf_printf (file, ";\n");
}
else if (entry->opcode_rule->gen == switch_gen
|| entry->opcode_rule->gen == goto_switch_gen
|| entry->opcode_rule->gen == padded_switch_gen)
{
lf_printf (file, "{\n");
lf_indent (file, +2);
print_idecode_ifetch (file, entry->parent->nr_prefetched_words,
entry->nr_prefetched_words);
print_idecode_switch (file, entry, result);
lf_indent (file, -2);
lf_printf (file, "}\n");
}
else
{
lf_printf (file, "{\n");
lf_indent (file, +2);
print_idecode_ifetch (file, entry->parent->nr_prefetched_words,
entry->nr_prefetched_words);
print_idecode_table (file, entry, result);
lf_indent (file, -2);
lf_printf (file, "}\n");
}
if (entry->parent->opcode->is_boolean
|| entry->parent->opcode_rule->gen == switch_gen
|| entry->parent->opcode_rule->gen == padded_switch_gen)
{
lf_printf (file, "break;\n");
}
else if (entry->parent->opcode_rule->gen == goto_switch_gen)
{
print_goto_switch_break (file, entry);
}
else
{
ERROR ("bad switch");
}
}
lf_indent (file, -4);
lf_printf (file, " }\n");
}
static void
print_idecode_switch_illegal (lf *file, const char *result)
{
lf_indent (file, +2);
print_idecode_invalid (file, result, invalid_illegal);
lf_printf (file, "break;\n");
lf_indent (file, -2);
}
static void
print_idecode_switch_end (lf *file, gen_entry *table, int depth, void *data)
{
const char *result = data;
ASSERT (depth == 0);
ASSERT (table->opcode_rule->gen == switch_gen
|| table->opcode_rule->gen == goto_switch_gen
|| table->opcode_rule->gen == padded_switch_gen);
ASSERT (table->opcode);
if (table->opcode->is_boolean)
{
lf_printf (file, "}\n");
lf_indent (file, -2);
}
else if (table->opcode_rule->gen == switch_gen
|| table->opcode_rule->gen == padded_switch_gen)
{
lf_printf (file, "default:\n");
lf_indent (file, +2);
if (table->nr_entries == table->opcode->nr_opcodes)
{
print_sim_engine_abort (file,
"Internal error - bad switch generated");
lf_printf (file, "%sNULL_CIA;\n", result);
lf_printf (file, "break;\n");
}
else
{
print_idecode_switch_illegal (file, result);
}
lf_indent (file, -2);
lf_printf (file, "}\n");
lf_indent (file, -2);
}
else if (table->opcode_rule->gen == goto_switch_gen)
{
lf_printf (file, "illegal_");
lf_print_table_name (file, table);
lf_printf (file, ":\n");
print_idecode_invalid (file, result, invalid_illegal);
lf_printf (file, "break_");
lf_print_table_name (file, table);
lf_printf (file, ":;\n");
if (table->parent != NULL
&& (table->parent->opcode_rule->gen == switch_gen
|| table->parent->opcode_rule->gen == goto_switch_gen
|| table->parent->opcode_rule->gen == padded_switch_gen))
{
lf_indent (file, -2);
lf_printf (file, "}\n");
}
}
else
{
ERROR ("bad switch");
}
}
void
print_idecode_switch (lf *file, gen_entry *table, const char *result)
{
gen_entry_traverse_tree (file, table,
0,
print_idecode_switch_start,
print_idecode_switch_leaf,
print_idecode_switch_end, (void *) result);
}
static void
print_idecode_switch_function_header (lf *file,
gen_entry *table,
int is_function_definition,
int nr_prefetched_words)
{
lf_printf (file, "\n");
if (options.gen.code == generate_calls)
{
lf_printf (file, "static ");
if (options.gen.icache)
{
lf_printf (file, "idecode_semantic *");
}
else
{
lf_printf (file, "unsigned_word");
}
if (is_function_definition)
{
lf_printf (file, "\n");
}
else
{
lf_printf (file, " ");
}
lf_print_table_name (file, table);
lf_printf (file, "\n(");
print_icache_function_formal (file, nr_prefetched_words);
lf_printf (file, ")");
if (!is_function_definition)
{
lf_printf (file, ";");
}
lf_printf (file, "\n");
}
if (options.gen.code == generate_jumps && is_function_definition)
{
lf_indent (file, -1);
lf_print_table_name (file, table);
lf_printf (file, ":\n");
lf_indent (file, +1);
}
}
static void
idecode_declare_if_switch (lf *file, gen_entry *table, int depth, void *data)
{
if ((table->opcode_rule->gen == switch_gen || table->opcode_rule->gen == goto_switch_gen || table->opcode_rule->gen == padded_switch_gen) &&table->parent != NULL
&& table->parent->opcode_rule->gen == array_gen)
{
print_idecode_switch_function_header (file,
table,
0 ,
0);
}
}
static void
idecode_expand_if_switch (lf *file, gen_entry *table, int depth, void *data)
{
if ((table->opcode_rule->gen == switch_gen || table->opcode_rule->gen == goto_switch_gen || table->opcode_rule->gen == padded_switch_gen) &&table->parent != NULL
&& table->parent->opcode_rule->gen == array_gen)
{
print_idecode_switch_function_header (file,
table,
1 ,
0);
if (options.gen.code == generate_calls)
{
lf_printf (file, "{\n");
lf_indent (file, +2);
}
print_idecode_switch (file, table, "return");
if (options.gen.code == generate_calls)
{
lf_indent (file, -2);
lf_printf (file, "}\n");
}
}
}
void
print_idecode_lookups (lf *file, gen_entry *table, cache_entry *cache_rules)
{
int depth;
gen_entry_traverse_tree (file, table, 1, idecode_declare_if_switch,
NULL, NULL, NULL);
for (depth = gen_entry_depth (table); depth > 0; depth--)
{
gen_entry_traverse_tree (file, table,
1 - depth,
print_idecode_table_start,
print_idecode_table_leaf,
print_idecode_table_end, NULL);
}
gen_entry_traverse_tree (file, table, 1, idecode_expand_if_switch,
NULL, NULL, NULL);
}
void
print_idecode_body (lf *file, gen_entry *table, const char *result)
{
if (table->opcode_rule->gen == switch_gen
|| table->opcode_rule->gen == goto_switch_gen
|| table->opcode_rule->gen == padded_switch_gen)
{
print_idecode_switch (file, table, result);
}
else
{
print_idecode_table (file, table, result);
}
}
#if 0
static void
print_jump (lf *file, int is_tail)
{
if (is_tail)
{
lf_putstr (file, "if (keep_running != NULL && !*keep_running)\n");
lf_putstr (file, " cpu_halt(cpu, nia, was_continuing, 0/*na*/);\n");
}
if (!options.generate_smp)
{
lf_putstr (file, "if (WITH_EVENTS) {\n");
lf_putstr (file, " if (event_queue_tick(events)) {\n");
lf_putstr (file, " cpu_set_program_counter(cpu, nia);\n");
lf_putstr (file, " event_queue_process(events);\n");
lf_putstr (file, " nia = cpu_get_program_counter(cpu);\n");
lf_putstr (file, " }\n");
lf_putstr (file, "}\n");
}
if (options.generate_smp)
{
if (is_tail)
{
lf_putstr (file, "cpu_set_program_counter(cpu, nia);\n");
}
lf_putstr (file, "if (WITH_EVENTS) {\n");
lf_putstr (file, " current_cpu += 1;\n");
lf_putstr (file, " if (current_cpu >= nr_cpus) {\n");
lf_putstr (file, " if (event_queue_tick(events)) {\n");
lf_putstr (file, " event_queue_process(events);\n");
lf_putstr (file, " }\n");
lf_putstr (file, " current_cpu = 0;\n");
lf_putstr (file, " }\n");
lf_putstr (file, "}\n");
lf_putstr (file, "else {\n");
lf_putstr (file, " current_cpu = (current_cpu + 1) % nr_cpus;\n");
lf_putstr (file, "}\n");
lf_putstr (file, "cpu = cpus[current_cpu];\n");
lf_putstr (file, "nia = cpu_get_program_counter(cpu);\n");
}
if (options.gen.icache)
{
lf_putstr (file, "cache_entry = cpu_icache_entry(cpu, nia);\n");
lf_putstr (file, "if (cache_entry->address == nia) {\n");
lf_putstr (file, " /* cache hit */\n");
lf_putstr (file, " goto *cache_entry->semantic;\n");
lf_putstr (file, "}\n");
if (is_tail)
{
lf_putstr (file, "goto cache_miss;\n");
}
}
if (!options.gen.icache && is_tail)
{
lf_printf (file, "goto idecode;\n");
}
}
#endif
#if 0
static void
print_jump_insn (lf *file,
insn_entry * instruction,
insn_bits * expanded_bits,
opcode_field *opcodes, cache_entry *cache_rules)
{
lf_printf (file, "\n");
print_my_defines (file, expanded_bits, instruction->name);
if (options.gen.icache)
{
lf_printf (file, "\n");
lf_indent (file, -1);
print_function_name (file,
instruction->name,
expanded_bits, function_name_prefix_icache);
lf_printf (file, ":\n");
lf_indent (file, +1);
lf_printf (file, "{\n");
lf_indent (file, +2);
lf_putstr (file, "const unsigned_word cia = nia;\n");
print_itrace (file, instruction, 1 );
print_idecode_validate (file, instruction, opcodes);
lf_printf (file, "\n");
lf_printf (file, "{\n");
lf_indent (file, +2);
print_icache_body (file, instruction, expanded_bits, cache_rules, 0,
put_values_in_icache);
lf_printf (file, "cache_entry->address = nia;\n");
lf_printf (file, "cache_entry->semantic = &&");
print_function_name (file,
instruction->name,
expanded_bits, function_name_prefix_semantics);
lf_printf (file, ";\n");
if (options.gen.semantic_icache)
{
print_semantic_body (file, instruction, expanded_bits, opcodes);
print_jump (file, 1 );
}
else
{
lf_printf (file, "/* goto ");
print_function_name (file,
instruction->name,
expanded_bits, function_name_prefix_semantics);
lf_printf (file, "; */\n");
}
lf_indent (file, -2);
lf_putstr (file, "}\n");
lf_indent (file, -2);
lf_printf (file, "}\n");
}
lf_printf (file, "\n");
lf_indent (file, -1);
print_function_name (file,
instruction->name,
expanded_bits, function_name_prefix_semantics);
lf_printf (file, ":\n");
lf_indent (file, +1);
lf_printf (file, "{\n");
lf_indent (file, +2);
lf_putstr (file, "const unsigned_word cia = nia;\n");
print_icache_body (file,
instruction,
expanded_bits,
cache_rules,
(options.gen.direct_access
? define_variables
: declare_variables),
(options.gen.icache
? get_values_from_icache : do_not_use_icache));
print_semantic_body (file, instruction, expanded_bits, opcodes);
if (options.gen.direct_access)
print_icache_body (file,
instruction,
expanded_bits,
cache_rules,
undef_variables,
(options.gen.icache
? get_values_from_icache : do_not_use_icache));
print_jump (file, 1 );
lf_indent (file, -2);
lf_printf (file, "}\n");
}
#endif
#if 0
static void
print_jump_definition (lf *file,
gen_entry *entry,
insn_entry * insn, int depth, void *data)
{
cache_entry *cache_rules = (cache_entry *) data;
if (options.generate_expanded_instructions)
{
ASSERT (entry->nr_insns == 1
&& entry->opcode == NULL
&& entry->parent != NULL && entry->parent->opcode != NULL);
ASSERT (entry->nr_insns == 1
&& entry->opcode == NULL
&& entry->parent != NULL
&& entry->parent->opcode != NULL
&& entry->parent->opcode_rule != NULL);
print_jump_insn (file,
entry->insns->words[0]->insn,
entry->expanded_bits, entry->opcode, cache_rules);
}
else
{
print_jump_insn (file,
instruction->words[0]->insn, NULL, NULL, cache_rules);
}
}
#endif
#if 0
static void
print_jump_internal_function (lf *file,
gen_entry *table,
function_entry * function, void *data)
{
if (function->is_internal)
{
lf_printf (file, "\n");
lf_print__line_ref (file, function->line);
lf_indent (file, -1);
print_function_name (file,
function->name,
NULL,
(options.gen.icache
? function_name_prefix_icache
: function_name_prefix_semantics));
lf_printf (file, ":\n");
lf_indent (file, +1);
lf_printf (file, "{\n");
lf_indent (file, +2);
lf_printf (file, "const unsigned_word cia = nia;\n");
table_print_code (file, function->code);
lf_print__internal_ref (file);
print_sim_engine_abort (file, "Internal function must longjump");
lf_indent (file, -2);
lf_printf (file, "}\n");
}
}
#endif
#if 0
static void
print_jump_until_stop_body (lf *file,
insn_table *table, cache_table * cache_rules)
{
lf_printf (file, "{\n");
lf_indent (file, +2);
lf_putstr (file, "jmp_buf halt;\n");
lf_putstr (file, "jmp_buf restart;\n");
lf_putstr (file, "sim_cpu *cpu = NULL;\n");
lf_putstr (file, "unsigned_word nia = -1;\n");
lf_putstr (file, "instruction_word instruction = 0;\n");
if ((code & generate_with_icache))
{
lf_putstr (file, "idecode_cache *cache_entry = NULL;\n");
}
if (generate_smp)
{
lf_putstr (file, "int current_cpu = -1;\n");
}
print_idecode_lookups (file, table, cache_rules);
if ((code & generate_with_icache))
{
lf_putstr (file, "\n");
lf_putstr (file, "{\n");
lf_putstr (file, " int cpu_nr;\n");
lf_putstr (file, " for (cpu_nr = 0; cpu_nr < nr_cpus; cpu_nr++)\n");
lf_putstr (file, " cpu_flush_icache(cpus[cpu_nr]);\n");
lf_putstr (file, "}\n");
}
lf_putstr (file, "\n");
lf_putstr (file, "psim_set_halt_and_restart(system, &halt, &restart);\n");
lf_putstr (file, "\n");
lf_putstr (file, "if (setjmp(halt))\n");
lf_putstr (file, " return;\n");
lf_putstr (file, "\n");
lf_putstr (file, "setjmp(restart);\n");
lf_putstr (file, "\n");
if (!generate_smp)
{
lf_putstr (file, "cpu = cpus[0];\n");
lf_putstr (file, "nia = cpu_get_program_counter(cpu);\n");
}
else
{
lf_putstr (file, "current_cpu = psim_last_cpu(system);\n");
}
if (!(code & generate_with_icache))
{
lf_printf (file, "\n");
lf_indent (file, -1);
lf_printf (file, "idecode:\n");
lf_indent (file, +1);
}
print_jump (file, 0 );
if ((code & generate_with_icache))
{
lf_indent (file, -1);
lf_printf (file, "cache_miss:\n");
lf_indent (file, +1);
}
lf_putstr (file, "instruction\n");
lf_putstr (file, " = vm_instruction_map_read(cpu_instruction_map(cpu),\n");
lf_putstr (file, " cpu, nia);\n");
print_idecode_body (file, table, "/*IGORE*/");
insn_table_traverse_function (table,
file, NULL, print_jump_internal_function);
if (generate_expanded_instructions)
insn_table_traverse_tree (table, file, cache_rules, 1, NULL,
print_jump_definition,
NULL,
NULL);
else
insn_table_traverse_insn (table,
file, cache_rules, print_jump_definition);
lf_indent (file, -2);
lf_printf (file, "}\n");
}
#endif
void
print_idecode_validate (lf *file,
insn_entry * instruction, insn_opcodes *opcode_paths)
{
{
int nr_checks = 0;
int word_nr;
lf_printf (file, "\n");
lf_indent_suppress (file);
lf_printf (file, "#if defined (WITH_RESERVED_BITS)\n");
lf_printf (file, "/* validate: ");
print_insn_words (file, instruction);
lf_printf (file, " */\n");
for (word_nr = 0; word_nr < instruction->nr_words; word_nr++)
{
insn_uint check_mask = 0;
insn_uint check_val = 0;
insn_word_entry *word = instruction->word[word_nr];
int bit_nr;
for (bit_nr = 0; bit_nr < options.insn_bit_size; bit_nr++)
{
insn_bit_entry *bit = word->bit[bit_nr];
insn_field_entry *field = bit->field;
check_mask <<= 1;
check_val <<= 1;
if (field->type != insn_field_int
&& field->type != insn_field_reserved)
continue;
if (opcode_paths != NULL)
{
insn_opcodes *entry;
for (entry = opcode_paths; entry != NULL; entry = entry->next)
{
opcode_field *opcode;
for (opcode = entry->opcode;
opcode != NULL; opcode = opcode->parent)
{
if (opcode->word_nr == word_nr
&& opcode->first <= bit_nr
&& opcode->last >= bit_nr)
break;
}
if (opcode == NULL)
break;
}
if (entry == NULL)
continue;
}
check_mask |= 1;
check_val |= bit->value;
}
if (check_mask)
{
if (nr_checks == 0)
{
lf_printf (file, "if (WITH_RESERVED_BITS)\n");
lf_printf (file, " {\n");
lf_indent (file, +4);
}
nr_checks++;
if (options.insn_bit_size > 32)
{
lf_printf (file, "if ((instruction_%d\n", word_nr);
lf_printf (file, " & UNSIGNED64 (0x%08lx%08lx))\n",
(unsigned long) (check_mask >> 32),
(unsigned long) (check_mask));
lf_printf (file, " != UNSIGNED64 (0x%08lx%08lx))\n",
(unsigned long) (check_val >> 32),
(unsigned long) (check_val));
}
else
{
lf_printf (file,
"if ((instruction_%d & 0x%08lx) != 0x%08lx)\n",
word_nr, (unsigned long) (check_mask),
(unsigned long) (check_val));
}
lf_indent (file, +2);
print_idecode_invalid (file, "return", invalid_illegal);
lf_indent (file, -2);
}
}
if (nr_checks > 0)
{
lf_indent (file, -4);
lf_printf (file, " }\n");
}
lf_indent_suppress (file);
lf_printf (file, "#endif\n");
}
{
if (filter_is_member (instruction->flags, "f"))
{
lf_printf (file, "\n");
lf_indent_suppress (file);
lf_printf (file, "#if defined(CURRENT_FLOATING_POINT)\n");
lf_printf (file, "/* Validate: FP hardware exists */\n");
lf_printf (file,
"if (CURRENT_FLOATING_POINT != HARD_FLOATING_POINT) {\n");
lf_indent (file, +2);
print_idecode_invalid (file, "return", invalid_illegal);
lf_indent (file, -2);
lf_printf (file, "}\n");
lf_indent_suppress (file);
lf_printf (file, "#endif\n");
}
}
{
if (filter_is_member (instruction->flags, "f"))
{
lf_printf (file, "\n");
lf_indent_suppress (file);
lf_printf (file, "#if defined(IS_FP_AVAILABLE)\n");
lf_printf (file, "/* Validate: FP available according to cpu */\n");
lf_printf (file, "if (!IS_FP_AVAILABLE) {\n");
lf_indent (file, +2);
print_idecode_invalid (file, "return", invalid_fp_unavailable);
lf_indent (file, -2);
lf_printf (file, "}\n");
lf_indent_suppress (file);
lf_printf (file, "#endif\n");
}
}
{
if (filter_is_member (instruction->options, "s")
|| options.gen.slot_verification)
{
lf_printf (file, "\n");
lf_indent_suppress (file);
lf_printf (file, "#if defined(IS_WRONG_SLOT)\n");
lf_printf (file,
"/* Validate: Instruction issued in correct slot */\n");
lf_printf (file, "if (IS_WRONG_SLOT) {\n");
lf_indent (file, +2);
print_idecode_invalid (file, "return", invalid_wrong_slot);
lf_indent (file, -2);
lf_printf (file, "}\n");
lf_indent_suppress (file);
lf_printf (file, "#endif\n");
}
}
}
void
print_idecode_issue_function_header (lf *file,
const char *processor,
function_decl_type decl_type,
int nr_prefetched_words)
{
int indent;
lf_printf (file, "\n");
switch (decl_type)
{
case is_function_declaration:
lf_print__function_type_function (file, print_semantic_function_type,
"INLINE_IDECODE", " ");
break;
case is_function_definition:
lf_print__function_type_function (file, print_semantic_function_type,
"INLINE_IDECODE", "\n");
break;
case is_function_variable:
print_semantic_function_type (file);
lf_printf (file, " (*");
break;
}
indent = print_function_name (file,
"issue",
NULL,
processor,
NULL, function_name_prefix_idecode);
switch (decl_type)
{
case is_function_definition:
indent += lf_printf (file, " (");
break;
case is_function_declaration:
lf_putstr (file, "\n(");
indent = 1;
break;
case is_function_variable:
lf_putstr (file, ")\n(");
indent = 1;
break;
}
lf_indent (file, +indent);
print_semantic_function_formal (file, nr_prefetched_words);
lf_putstr (file, ")");
lf_indent (file, -indent);
switch (decl_type)
{
case is_function_definition:
lf_printf (file, "\n");
break;
case is_function_declaration:
case is_function_variable:
lf_putstr (file, ";\n");
break;
}
}
void
print_idecode_globals (lf *file)
{
lf_printf (file, "enum {\n");
lf_printf (file, " /* greater or equal to zero => table */\n");
lf_printf (file, " function_entry = -1,\n");
lf_printf (file, " boolean_entry = -2,\n");
lf_printf (file, "};\n");
lf_printf (file, "\n");
lf_printf (file, "typedef struct _idecode_table_entry {\n");
lf_printf (file, " int shift;\n");
lf_printf (file, " unsigned%d mask;\n", options.insn_bit_size);
lf_printf (file, " unsigned%d value;\n", options.insn_bit_size);
lf_printf (file, " void *function_or_table;\n");
lf_printf (file, "} idecode_table_entry;\n");
}