365 lines
9.9 KiB
C
365 lines
9.9 KiB
C
/* CGEN generic assembler support code.
|
||
Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2007
|
||
Free Software Foundation, Inc.
|
||
|
||
This file is part of libopcodes.
|
||
|
||
This library 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 3, or (at your option)
|
||
any later version.
|
||
|
||
It 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.,
|
||
51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
|
||
|
||
#include "sysdep.h"
|
||
#include <stdio.h>
|
||
#include "ansidecl.h"
|
||
#include "libiberty.h"
|
||
#include "safe-ctype.h"
|
||
#include "bfd.h"
|
||
#include "symcat.h"
|
||
#include "opcode/cgen.h"
|
||
#include "opintl.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_asm_hash_table (CGEN_CPU_DESC);
|
||
|
||
/* Set the cgen_parse_operand_fn callback. */
|
||
|
||
void
|
||
cgen_set_parse_operand_fn (CGEN_CPU_DESC cd, cgen_parse_operand_fn fn)
|
||
{
|
||
cd->parse_operand_fn = fn;
|
||
}
|
||
|
||
/* Called whenever starting to parse an insn. */
|
||
|
||
void
|
||
cgen_init_parse_operand (CGEN_CPU_DESC cd)
|
||
{
|
||
/* This tells the callback to re-initialize. */
|
||
(void) (* cd->parse_operand_fn)
|
||
(cd, CGEN_PARSE_OPERAND_INIT, NULL, 0, 0, NULL, NULL);
|
||
}
|
||
|
||
/* Subroutine of build_asm_hash_table to add INSNS to the hash table.
|
||
|
||
COUNT is the number of elements in INSNS.
|
||
ENTSIZE is sizeof (CGEN_IBASE) for the target.
|
||
??? No longer used but leave in for now.
|
||
HTABLE points to the hash table.
|
||
HENTBUF is a pointer to sufficiently large buffer of hash entries.
|
||
The result is a pointer to the next entry to use.
|
||
|
||
The table is scanned backwards as additions are made to the front of the
|
||
list and we want earlier ones to be prefered. */
|
||
|
||
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 i;
|
||
|
||
for (i = count - 1; i >= 0; --i, ++hentbuf)
|
||
{
|
||
unsigned int hash;
|
||
const CGEN_INSN *insn = &insns[i];
|
||
|
||
if (! (* cd->asm_hash_p) (insn))
|
||
continue;
|
||
hash = (* cd->asm_hash) (CGEN_INSN_MNEMONIC (insn));
|
||
hentbuf->next = htable[hash];
|
||
hentbuf->insn = insn;
|
||
htable[hash] = hentbuf;
|
||
}
|
||
|
||
return hentbuf;
|
||
}
|
||
|
||
/* Subroutine of build_asm_hash_table to add INSNS to the hash table.
|
||
This function is identical to hash_insn_array except the insns are
|
||
in a list. */
|
||
|
||
static CGEN_INSN_LIST *
|
||
hash_insn_list (CGEN_CPU_DESC cd,
|
||
const CGEN_INSN_LIST *insns,
|
||
CGEN_INSN_LIST **htable,
|
||
CGEN_INSN_LIST *hentbuf)
|
||
{
|
||
const CGEN_INSN_LIST *ilist;
|
||
|
||
for (ilist = insns; ilist != NULL; ilist = ilist->next, ++ hentbuf)
|
||
{
|
||
unsigned int hash;
|
||
|
||
if (! (* cd->asm_hash_p) (ilist->insn))
|
||
continue;
|
||
hash = (* cd->asm_hash) (CGEN_INSN_MNEMONIC (ilist->insn));
|
||
hentbuf->next = htable[hash];
|
||
hentbuf->insn = ilist->insn;
|
||
htable[hash] = hentbuf;
|
||
}
|
||
|
||
return hentbuf;
|
||
}
|
||
|
||
/* Build the assembler instruction hash table. */
|
||
|
||
static void
|
||
build_asm_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->asm_hash_size;
|
||
CGEN_INSN_LIST *hash_entry_buf;
|
||
CGEN_INSN_LIST **asm_hash_table;
|
||
CGEN_INSN_LIST *asm_hash_table_entries;
|
||
|
||
/* The space allocated for the hash table consists of two parts:
|
||
the hash table and the hash lists. */
|
||
|
||
asm_hash_table = (CGEN_INSN_LIST **)
|
||
xmalloc (hash_size * sizeof (CGEN_INSN_LIST *));
|
||
memset (asm_hash_table, 0, hash_size * sizeof (CGEN_INSN_LIST *));
|
||
asm_hash_table_entries = hash_entry_buf = (CGEN_INSN_LIST *)
|
||
xmalloc (count * sizeof (CGEN_INSN_LIST));
|
||
|
||
/* Add compiled in insns.
|
||
Don't include the first one as it is a reserved entry. */
|
||
/* ??? It was the end of all hash chains, and also the special
|
||
"invalid insn" marker. May be able to do it differently now. */
|
||
|
||
hash_entry_buf = hash_insn_array (cd,
|
||
insn_table->init_entries + 1,
|
||
insn_table->num_init_entries - 1,
|
||
insn_table->entry_size,
|
||
asm_hash_table, hash_entry_buf);
|
||
|
||
/* Add compiled in macro-insns. */
|
||
|
||
hash_entry_buf = hash_insn_array (cd, macro_insn_table->init_entries,
|
||
macro_insn_table->num_init_entries,
|
||
macro_insn_table->entry_size,
|
||
asm_hash_table, hash_entry_buf);
|
||
|
||
/* Add runtime added insns.
|
||
Later added insns will be prefered over earlier ones. */
|
||
|
||
hash_entry_buf = hash_insn_list (cd, insn_table->new_entries,
|
||
asm_hash_table, hash_entry_buf);
|
||
|
||
/* Add runtime added macro-insns. */
|
||
|
||
hash_insn_list (cd, macro_insn_table->new_entries,
|
||
asm_hash_table, hash_entry_buf);
|
||
|
||
cd->asm_hash_table = asm_hash_table;
|
||
cd->asm_hash_table_entries = asm_hash_table_entries;
|
||
}
|
||
|
||
/* Return the first entry in the hash list for INSN. */
|
||
|
||
CGEN_INSN_LIST *
|
||
cgen_asm_lookup_insn (CGEN_CPU_DESC cd, const char *insn)
|
||
{
|
||
unsigned int hash;
|
||
|
||
if (cd->asm_hash_table == NULL)
|
||
build_asm_hash_table (cd);
|
||
|
||
hash = (* cd->asm_hash) (insn);
|
||
return cd->asm_hash_table[hash];
|
||
}
|
||
|
||
/* Keyword parser.
|
||
The result is NULL upon success or an error message.
|
||
If successful, *STRP is updated to point passed the keyword.
|
||
|
||
??? At present we have a static notion of how to pick out a keyword.
|
||
Later we can allow a target to customize this if necessary [say by
|
||
recording something in the keyword table]. */
|
||
|
||
const char *
|
||
cgen_parse_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
|
||
const char **strp,
|
||
CGEN_KEYWORD *keyword_table,
|
||
long *valuep)
|
||
{
|
||
const CGEN_KEYWORD_ENTRY *ke;
|
||
char buf[256];
|
||
const char *p,*start;
|
||
|
||
if (keyword_table->name_hash_table == NULL)
|
||
(void) cgen_keyword_search_init (keyword_table, NULL);
|
||
|
||
p = start = *strp;
|
||
|
||
/* Allow any first character. This is to make life easier for
|
||
the fairly common case of suffixes, eg. 'ld.b.w', where the first
|
||
character of the suffix ('.') is special. */
|
||
if (*p)
|
||
++p;
|
||
|
||
/* Allow letters, digits, and any special characters. */
|
||
while (((p - start) < (int) sizeof (buf))
|
||
&& *p
|
||
&& (ISALNUM (*p)
|
||
|| *p == '_'
|
||
|| strchr (keyword_table->nonalpha_chars, *p)))
|
||
++p;
|
||
|
||
if (p - start >= (int) sizeof (buf))
|
||
{
|
||
/* All non-empty CGEN keywords can fit into BUF. The only thing
|
||
we can match here is the empty keyword. */
|
||
buf[0] = 0;
|
||
}
|
||
else
|
||
{
|
||
memcpy (buf, start, p - start);
|
||
buf[p - start] = 0;
|
||
}
|
||
|
||
ke = cgen_keyword_lookup_name (keyword_table, buf);
|
||
|
||
if (ke != NULL)
|
||
{
|
||
*valuep = ke->value;
|
||
/* Don't advance pointer if we recognized the null keyword. */
|
||
if (ke->name[0] != 0)
|
||
*strp = p;
|
||
return NULL;
|
||
}
|
||
|
||
return "unrecognized keyword/register name";
|
||
}
|
||
|
||
/* Parse a small signed integer parser.
|
||
??? VALUEP is not a bfd_vma * on purpose, though this is confusing.
|
||
Note that if the caller expects a bfd_vma result, it should call
|
||
cgen_parse_address. */
|
||
|
||
const char *
|
||
cgen_parse_signed_integer (CGEN_CPU_DESC cd,
|
||
const char **strp,
|
||
int opindex,
|
||
long *valuep)
|
||
{
|
||
bfd_vma value;
|
||
enum cgen_parse_operand_result result;
|
||
const char *errmsg;
|
||
|
||
errmsg = (* cd->parse_operand_fn)
|
||
(cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE,
|
||
&result, &value);
|
||
/* FIXME: Examine `result'. */
|
||
if (!errmsg)
|
||
*valuep = value;
|
||
return errmsg;
|
||
}
|
||
|
||
/* Parse a small unsigned integer parser.
|
||
??? VALUEP is not a bfd_vma * on purpose, though this is confusing.
|
||
Note that if the caller expects a bfd_vma result, it should call
|
||
cgen_parse_address. */
|
||
|
||
const char *
|
||
cgen_parse_unsigned_integer (CGEN_CPU_DESC cd,
|
||
const char **strp,
|
||
int opindex,
|
||
unsigned long *valuep)
|
||
{
|
||
bfd_vma value;
|
||
enum cgen_parse_operand_result result;
|
||
const char *errmsg;
|
||
|
||
errmsg = (* cd->parse_operand_fn)
|
||
(cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE,
|
||
&result, &value);
|
||
/* FIXME: Examine `result'. */
|
||
if (!errmsg)
|
||
*valuep = value;
|
||
return errmsg;
|
||
}
|
||
|
||
/* Address parser. */
|
||
|
||
const char *
|
||
cgen_parse_address (CGEN_CPU_DESC cd,
|
||
const char **strp,
|
||
int opindex,
|
||
int opinfo,
|
||
enum cgen_parse_operand_result *resultp,
|
||
bfd_vma *valuep)
|
||
{
|
||
bfd_vma value;
|
||
enum cgen_parse_operand_result result_type;
|
||
const char *errmsg;
|
||
|
||
errmsg = (* cd->parse_operand_fn)
|
||
(cd, CGEN_PARSE_OPERAND_ADDRESS, strp, opindex, opinfo,
|
||
&result_type, &value);
|
||
/* FIXME: Examine `result'. */
|
||
if (!errmsg)
|
||
{
|
||
if (resultp != NULL)
|
||
*resultp = result_type;
|
||
*valuep = value;
|
||
}
|
||
return errmsg;
|
||
}
|
||
|
||
/* Signed integer validation routine. */
|
||
|
||
const char *
|
||
cgen_validate_signed_integer (long value, long min, long max)
|
||
{
|
||
if (value < min || value > max)
|
||
{
|
||
static char buf[100];
|
||
|
||
/* xgettext:c-format */
|
||
sprintf (buf, _("operand out of range (%ld not between %ld and %ld)"),
|
||
value, min, max);
|
||
return buf;
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Unsigned integer validation routine.
|
||
Supplying `min' here may seem unnecessary, but we also want to handle
|
||
cases where min != 0 (and max > LONG_MAX). */
|
||
|
||
const char *
|
||
cgen_validate_unsigned_integer (unsigned long value,
|
||
unsigned long min,
|
||
unsigned long max)
|
||
{
|
||
if (value < min || value > max)
|
||
{
|
||
static char buf[100];
|
||
|
||
/* xgettext:c-format */
|
||
sprintf (buf, _("operand out of range (%lu not between %lu and %lu)"),
|
||
value, min, max);
|
||
return buf;
|
||
}
|
||
|
||
return NULL;
|
||
}
|