/* CGEN generic assembler support code.
-Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+ Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
-This file is part of the GNU Binutils and GDB, the GNU debugger.
+ This file is part of the GNU Binutils and GDB, the GNU debugger.
-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, or (at your option)
-any later version.
+ 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, 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.
+ 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. */
+ 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. */
-#include "config.h"
+#include "sysdep.h"
#include <stdio.h>
-#ifdef HAVE_STRING_H
-#include <string.h>
-#endif
-#ifdef HAVE_STRINGS_H
-#include <strings.h>
-#endif
+#include <ctype.h>
#include "ansidecl.h"
#include "libiberty.h"
#include "bfd.h"
+#include "symcat.h"
#include "opcode/cgen.h"
/* Operand parsing callback. */
/* This is not published as part of the public interface so we don't
declare this in cgen.h. */
-extern CGEN_OPCODE_DATA *cgen_current_opcode_data;
+extern CGEN_OPCODE_TABLE *cgen_current_opcode_table;
/* Assembler instruction hash table. */
static CGEN_INSN_LIST **asm_hash_table;
+static CGEN_INSN_LIST *asm_hash_table_entries;
/* Called once at startup and whenever machine/endian change. */
if (asm_hash_table)
{
free (asm_hash_table);
+ free (asm_hash_table_entries);
asm_hash_table = NULL;
+ asm_hash_table_entries = NULL;
}
}
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_INSN) for the target.
+ This is a bit tricky as the size of the attribute member of CGEN_INSN
+ is variable among architectures. This code could be moved to
+ cgen-asm.in, but I prefer to keep it here for now.
+ OTABLE is the opcode table.
+ 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 (insns, count, entsize, otable, htable, hentbuf)
+ const CGEN_INSN * insns;
+ int count;
+ int entsize;
+ const CGEN_OPCODE_TABLE * otable;
+ CGEN_INSN_LIST ** htable;
+ CGEN_INSN_LIST * hentbuf;
+{
+ const CGEN_INSN * insn;
+
+ for (insn = (CGEN_INSN *) ((char *) insns + entsize * (count - 1));
+ insn >= insns;
+ insn = (CGEN_INSN *) ((char *) insn - entsize), ++ hentbuf)
+ {
+ unsigned int hash;
+
+ if (! (*otable->asm_hash_p) (insn))
+ continue;
+ hash = (*otable->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 (insns, otable, htable, hentbuf)
+ const CGEN_INSN_LIST * insns;
+ const CGEN_OPCODE_TABLE * otable;
+ 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 (! (*otable->asm_hash_p) (ilist->insn))
+ continue;
+ hash = (*otable->asm_hash) (CGEN_INSN_MNEMONIC (ilist->insn));
+ hentbuf->next = htable[hash];
+ hentbuf->insn = ilist->insn;
+ asm_hash_table[hash] = hentbuf;
+ }
+
+ return hentbuf;
+}
+
/* Build the assembler instruction hash table. */
static void
build_asm_hash_table ()
{
- int i;
- unsigned int hash;
- int count = cgen_insn_count ();
- CGEN_OPCODE_DATA *data = cgen_current_opcode_data;
- CGEN_INSN_TABLE *insn_table = data->insn_table;
- unsigned int hash_size = insn_table->asm_hash_table_size;
- const CGEN_INSN *insn;
- CGEN_INSN_LIST *insn_lists,*new_insns;
+ int count = cgen_insn_count () + cgen_macro_insn_count ();
+ CGEN_OPCODE_TABLE *opcode_table = cgen_current_opcode_table;
+ CGEN_INSN_TABLE *insn_table = opcode_table->insn_table;
+ CGEN_INSN_TABLE *macro_insn_table = opcode_table->macro_insn_table;
+ unsigned int hash_size = opcode_table->asm_hash_table_size;
+ CGEN_INSN_LIST *hash_entry_buf;
/* 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 *)
- + count * sizeof (CGEN_INSN_LIST));
- memset (asm_hash_table, 0,
- hash_size * sizeof (CGEN_INSN_LIST *)
- + count * sizeof (CGEN_INSN_LIST));
- insn_lists = (CGEN_INSN_LIST *) (asm_hash_table + hash_size);
+ 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.
- The table is scanned backwards as later additions are inserted in
- front of earlier ones and we want earlier ones to be prefered.
- We stop at the first one as it is a reserved entry. */
+ Don't include the first one as it is a reserved entry. */
+ /* ??? It was the end of all hash chains, and also the special
+ "illegal insn" marker. May be able to do it differently now. */
- for (insn = insn_table->init_entries + insn_table->num_init_entries - 1;
- insn > insn_table->init_entries;
- --insn, ++insn_lists)
- {
- hash = (*insn_table->asm_hash) (insn->syntax.mnemonic);
- insn_lists->next = asm_hash_table[hash];
- insn_lists->insn = insn;
- asm_hash_table[hash] = insn_lists;
- }
+ hash_entry_buf = hash_insn_array ((CGEN_INSN *) ((char *) insn_table->init_entries
+ + insn_table->entry_size),
+ insn_table->num_init_entries - 1,
+ insn_table->entry_size,
+ opcode_table, asm_hash_table, hash_entry_buf);
+
+ /* Add compiled in macro-insns. */
+
+ hash_entry_buf = hash_insn_array (macro_insn_table->init_entries,
+ macro_insn_table->num_init_entries,
+ macro_insn_table->entry_size,
+ opcode_table, asm_hash_table, hash_entry_buf);
/* Add runtime added insns.
- ??? Currently later added insns will be prefered over earlier ones.
- Not sure this is a bug or not. */
- for (new_insns = insn_table->new_entries;
- new_insns != NULL;
- new_insns = new_insns->next, ++insn_lists)
- {
- hash = (*insn_table->asm_hash) (new_insns->insn->syntax.mnemonic);
- insn_lists->next = asm_hash_table[hash];
- insn_lists->insn = new_insns->insn;
- asm_hash_table[hash] = insn_lists;
- }
+ Later added insns will be prefered over earlier ones. */
+
+ hash_entry_buf = hash_insn_list (insn_table->new_entries, opcode_table,
+ asm_hash_table, hash_entry_buf);
+
+ /* Add runtime added macro-insns. */
+
+ hash_insn_list (macro_insn_table->new_entries,
+ opcode_table, asm_hash_table, hash_entry_buf);
}
-/* Return the first entry in the hash list for INSN. */
+/* Return the first entry in the hash list for INSN.
+ ??? Of course it would be better to pass in a pointer to the
+ opcode data structure, rather than reference a global. Later. */
CGEN_INSN_LIST *
cgen_asm_lookup_insn (insn)
if (asm_hash_table == NULL)
build_asm_hash_table ();
- hash = (*cgen_current_opcode_data->insn_table->asm_hash) (insn);
+ hash = (*cgen_current_opcode_table->asm_hash) (insn);
return asm_hash_table[hash];
}
\f
const char *
cgen_parse_keyword (strp, keyword_table, valuep)
const char **strp;
- struct cgen_keyword *keyword_table;
+ CGEN_KEYWORD *keyword_table;
long *valuep;
{
- const struct cgen_keyword_entry *ke;
+ const CGEN_KEYWORD_ENTRY *ke;
char buf[256];
- const char *p;
+ const char *p,*start;
- p = *strp;
+ p = start = *strp;
- /* Allow any first character. */
+ /* Allow any first character.
+ Note that this allows recognizing ",a" for the annul flag in sparc
+ even though "," is subsequently not a valid keyword char. */
if (*p)
++p;
/* Now allow letters, digits, and _. */
- while (isalnum (*p) || *p == '_')
+ while (((p - start) < (int) sizeof (buf))
+ && (isalnum ((unsigned char) *p) || *p == '_'))
++p;
- if (p - *strp > 255)
+ if (p - start >= (int) sizeof (buf))
return "unrecognized keyword/register name";
- memcpy (buf, *strp, p - *strp);
- buf[p - *strp] = 0;
+ memcpy (buf, start, p - start);
+ buf[p - start] = 0;
ke = cgen_keyword_lookup_name (keyword_table, buf);
if (ke != NULL)
{
*valuep = ke->value;
- *strp = p;
+ /* Don't advance pointer if we recognized the null keyword. */
+ if (ke->name[0] != 0)
+ *strp = p;
return NULL;
}
/* Signed integer parser. */
const char *
-cgen_parse_signed_integer (strp, opindex, min, max, valuep)
+cgen_parse_signed_integer (strp, opindex, valuep)
const char **strp;
int opindex;
- long min, max;
long *valuep;
{
- long value;
+ bfd_vma value;
enum cgen_parse_operand_result result;
const char *errmsg;
&result, &value);
/* FIXME: Examine `result'. */
if (!errmsg)
- {
- if (value < min || value > max)
- return "integer operand out of range";
- *valuep = value;
- }
+ *valuep = value;
return errmsg;
}
/* Unsigned integer parser. */
const char *
-cgen_parse_unsigned_integer (strp, opindex, min, max, valuep)
+cgen_parse_unsigned_integer (strp, opindex, valuep)
const char **strp;
int opindex;
- unsigned long min, max;
unsigned long *valuep;
{
- unsigned long value;
+ bfd_vma value;
enum cgen_parse_operand_result result;
const char *errmsg;
&result, &value);
/* FIXME: Examine `result'. */
if (!errmsg)
- {
- if (value < min || value > max)
- return "integer operand out of range";
- *valuep = value;
- }
+ *valuep = value;
return errmsg;
}
/* Address parser. */
const char *
-cgen_parse_address (strp, opindex, opinfo, valuep)
+cgen_parse_address (strp, opindex, opinfo, resultp, valuep)
const char **strp;
int opindex;
int opinfo;
+ enum cgen_parse_operand_result *resultp;
long *valuep;
{
- long value;
- enum cgen_parse_operand_result result;
+ bfd_vma value;
+ enum cgen_parse_operand_result result_type;
const char *errmsg;
errmsg = (*cgen_parse_operand_fn) (CGEN_PARSE_OPERAND_ADDRESS, strp,
opindex, opinfo,
- &result, &value);
+ &result_type, &value);
/* FIXME: Examine `result'. */
if (!errmsg)
{
+ if (resultp != NULL)
+ *resultp = result_type;
*valuep = value;
}
return errmsg;
#include "@arch@-opc.h"
/* Look up instruction INSN_VALUE and extract its fields.
- If non-null INSN is the insn table entry.
+ INSN, if non-null, is the insn table entry.
Otherwise INSN_VALUE is examined to compute it.
LENGTH is the bit length of INSN_VALUE if known, otherwise 0.
+ 0 is only valid if `insn == NULL && ! defined (CGEN_INT_INSN)'.
+ If INSN != NULL, LENGTH must be valid.
ALIAS_P is non-zero if alias insns are to be included in the search.
+
The result a pointer to the insn table entry, or NULL if the instruction
wasn't recognized. */
cgen_insn_t insn_value;
int length;
CGEN_FIELDS *fields;
+ int alias_p;
{
char buf[16];
extract handler. */
if ((insn_value & CGEN_INSN_MASK (insn)) == CGEN_INSN_VALUE (insn))
{
- length = (*CGEN_EXTRACT_FN (insn)) (insn, NULL, insn_value, fields);
- if (length > 0)
- return insn;
+ int elength = (*CGEN_EXTRACT_FN (insn)) (insn, NULL,
+ insn_value, fields);
+ if (elength > 0)
+ {
+ /* sanity check */
+ if (length != 0 && length != elength)
+ abort ();
+ return insn;
+ }
}
}
if (! alias_p
&& CGEN_INSN_ATTR (insn, CGEN_INSN_ALIAS))
abort ();
+ /* Sanity check: length must be correct. */
+ if (length != CGEN_INSN_BITSIZE (insn))
+ abort ();
length = (*CGEN_EXTRACT_FN (insn)) (insn, NULL, insn_value, fields);
- if (length > 0)
- return insn;
+ /* Sanity check: must succeed.
+ Could relax this later if it ever proves useful. */
+ if (length == 0)
+ abort ();
+ return insn;
}
return NULL;
}
-/* Fill in the operand instances used by insn INSN_VALUE.
- If non-null INS is the insn table entry.
- Otherwise INSN_VALUE is examined to compute it.
- LENGTH is the number of bits in INSN_VALUE if known, otherwise 0.
+/* Fill in the operand instances used by INSN whose operands are FIELDS.
INDICES is a pointer to a buffer of MAX_OPERAND_INSTANCES ints to be filled
- in.
- The result a pointer to the insn table entry, or NULL if the instruction
- wasn't recognized. */
+ in. */
-const CGEN_INSN *
-@arch@_cgen_get_insn_operands (insn, insn_value, length, indices)
- const CGEN_INSN *insn;
- cgen_insn_t insn_value;
- int length;
+void
+@arch@_cgen_get_insn_operands (insn, fields, indices)
+ const CGEN_INSN * insn;
+ const CGEN_FIELDS * fields;
int *indices;
{
- CGEN_FIELDS fields;
const CGEN_OPERAND_INSTANCE *opinst;
int i;
- /* FIXME: ALIAS insns are in transition from being record in the insn table
- to being recorded separately as macros. They don't have semantic code
- so they can't be used here. Thus we currently always ignore the INSN
- argument. */
- insn = @arch@_cgen_lookup_insn (NULL, insn_value, length, &fields, 0);
- if (! insn)
- return NULL;
-
for (i = 0, opinst = CGEN_INSN_OPERANDS (insn);
opinst != NULL
&& CGEN_OPERAND_INSTANCE_TYPE (opinst) != CGEN_OPERAND_INSTANCE_END;
if (op == NULL)
indices[i] = CGEN_OPERAND_INSTANCE_INDEX (opinst);
else
- indices[i] = @arch@_cgen_get_operand (CGEN_OPERAND_INDEX (op), &fields);
+ indices[i] = @arch@_cgen_get_operand (CGEN_OPERAND_INDEX (op), fields);
}
+}
+
+/* Cover function to @arch@_cgen_get_insn_operands when either INSN or FIELDS
+ isn't known.
+ The INSN, INSN_VALUE, and LENGTH arguments are passed to
+ @arch@_cgen_lookup_insn unchanged.
+
+ The result is the insn table entry or NULL if the instruction wasn't
+ recognized. */
+
+const CGEN_INSN *
+@arch@_cgen_lookup_get_insn_operands (insn, insn_value, length, indices)
+ const CGEN_INSN *insn;
+ cgen_insn_t insn_value;
+ int length;
+ int *indices;
+{
+ CGEN_FIELDS fields;
+
+ /* Pass non-zero for ALIAS_P only if INSN != NULL.
+ If INSN == NULL, we want a real insn. */
+ insn = @arch@_cgen_lookup_insn (insn, insn_value, length, &fields,
+ insn != NULL);
+ if (! insn)
+ return NULL;
+ @arch@_cgen_get_insn_operands (insn, &fields, indices);
return insn;
}
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