#include "sysdep.h"
#include <stdio.h>
#include "ansidecl.h"
#include "libiberty.h"
#include "bfd.h"
#include "symcat.h"
#include "opcode/cgen.h"
static CGEN_INSN_LIST * hash_insn_array (CGEN_CPU_DESC, const CGEN_INSN *, int, int, CGEN_INSN_LIST **, CGEN_INSN_LIST *);
static CGEN_INSN_LIST * hash_insn_list (CGEN_CPU_DESC, const CGEN_INSN_LIST *, CGEN_INSN_LIST **, CGEN_INSN_LIST *);
static void build_dis_hash_table (CGEN_CPU_DESC);
static int count_decodable_bits (const CGEN_INSN *);
static void add_insn_to_hash_chain (CGEN_INSN_LIST *,
const CGEN_INSN *,
CGEN_INSN_LIST **,
unsigned int);
static int
count_decodable_bits (const CGEN_INSN *insn)
{
unsigned mask = CGEN_INSN_BASE_MASK (insn);
int bits = 0;
int m;
for (m = 1; m != 0; m <<= 1)
{
if (mask & m)
++bits;
}
return bits;
}
static void
add_insn_to_hash_chain (CGEN_INSN_LIST *hentbuf,
const CGEN_INSN *insn,
CGEN_INSN_LIST **htable,
unsigned int hash)
{
CGEN_INSN_LIST *current_buf;
CGEN_INSN_LIST *previous_buf;
int insn_decodable_bits;
insn_decodable_bits = count_decodable_bits (insn);
previous_buf = NULL;
for (current_buf = htable[hash]; current_buf != NULL;
current_buf = current_buf->next)
{
int current_decodable_bits = count_decodable_bits (current_buf->insn);
if (insn_decodable_bits >= current_decodable_bits)
break;
previous_buf = current_buf;
}
hentbuf->insn = insn;
hentbuf->next = current_buf;
if (previous_buf == NULL)
htable[hash] = hentbuf;
else
previous_buf->next = hentbuf;
}
static CGEN_INSN_LIST *
hash_insn_array (CGEN_CPU_DESC cd,
const CGEN_INSN * insns,
int count,
int entsize ATTRIBUTE_UNUSED,
CGEN_INSN_LIST ** htable,
CGEN_INSN_LIST * hentbuf)
{
int big_p = CGEN_CPU_ENDIAN (cd) == CGEN_ENDIAN_BIG;
int i;
for (i = count - 1; i >= 0; --i, ++hentbuf)
{
unsigned int hash;
char buf [4];
unsigned long value;
const CGEN_INSN *insn = &insns[i];
if (! (* cd->dis_hash_p) (insn))
continue;
value = CGEN_INSN_BASE_VALUE (insn);
bfd_put_bits ((bfd_vma) value,
buf,
CGEN_INSN_MASK_BITSIZE (insn),
big_p);
hash = (* cd->dis_hash) (buf, value);
add_insn_to_hash_chain (hentbuf, insn, htable, hash);
}
return hentbuf;
}
static CGEN_INSN_LIST *
hash_insn_list (CGEN_CPU_DESC cd,
const CGEN_INSN_LIST *insns,
CGEN_INSN_LIST **htable,
CGEN_INSN_LIST *hentbuf)
{
int big_p = CGEN_CPU_ENDIAN (cd) == CGEN_ENDIAN_BIG;
const CGEN_INSN_LIST *ilist;
for (ilist = insns; ilist != NULL; ilist = ilist->next, ++ hentbuf)
{
unsigned int hash;
char buf[4];
unsigned long value;
if (! (* cd->dis_hash_p) (ilist->insn))
continue;
value = CGEN_INSN_BASE_VALUE (ilist->insn);
bfd_put_bits((bfd_vma) value,
buf,
CGEN_INSN_MASK_BITSIZE (ilist->insn),
big_p);
hash = (* cd->dis_hash) (buf, value);
add_insn_to_hash_chain (hentbuf, ilist->insn, htable, hash);
}
return hentbuf;
}
static void
build_dis_hash_table (CGEN_CPU_DESC cd)
{
int count = cgen_insn_count (cd) + cgen_macro_insn_count (cd);
CGEN_INSN_TABLE *insn_table = & cd->insn_table;
CGEN_INSN_TABLE *macro_insn_table = & cd->macro_insn_table;
unsigned int hash_size = cd->dis_hash_size;
CGEN_INSN_LIST *hash_entry_buf;
CGEN_INSN_LIST **dis_hash_table;
CGEN_INSN_LIST *dis_hash_table_entries;
dis_hash_table = (CGEN_INSN_LIST **)
xmalloc (hash_size * sizeof (CGEN_INSN_LIST *));
memset (dis_hash_table, 0, hash_size * sizeof (CGEN_INSN_LIST *));
dis_hash_table_entries = hash_entry_buf = (CGEN_INSN_LIST *)
xmalloc (count * sizeof (CGEN_INSN_LIST));
hash_entry_buf = hash_insn_array (cd,
insn_table->init_entries + 1,
insn_table->num_init_entries - 1,
insn_table->entry_size,
dis_hash_table, hash_entry_buf);
hash_entry_buf = hash_insn_array (cd, macro_insn_table->init_entries,
macro_insn_table->num_init_entries,
macro_insn_table->entry_size,
dis_hash_table, hash_entry_buf);
hash_entry_buf = hash_insn_list (cd, insn_table->new_entries,
dis_hash_table, hash_entry_buf);
hash_insn_list (cd, macro_insn_table->new_entries,
dis_hash_table, hash_entry_buf);
cd->dis_hash_table = dis_hash_table;
cd->dis_hash_table_entries = dis_hash_table_entries;
}
CGEN_INSN_LIST *
cgen_dis_lookup_insn (CGEN_CPU_DESC cd, const char * buf, CGEN_INSN_INT value)
{
unsigned int hash;
if (cd->dis_hash_table == NULL)
build_dis_hash_table (cd);
hash = (* cd->dis_hash) (buf, value);
return cd->dis_hash_table[hash];
}