/* itbl-ops.c
- Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
+ Copyright 1997, 1999, 2000, 2001 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
/*======================================================================*/
/* structures for keeping itbl format entries */
-struct itbl_range
- {
- int sbit; /* mask starting bit position */
- int ebit; /* mask ending bit position */
- };
+struct itbl_range {
+ int sbit; /* mask starting bit position */
+ int ebit; /* mask ending bit position */
+};
-struct itbl_field
- {
- e_type type; /* dreg/creg/greg/immed/symb */
- struct itbl_range range; /* field's bitfield range within instruction */
- unsigned long flags; /* field flags */
- struct itbl_field *next; /* next field in list */
- };
+struct itbl_field {
+ e_type type; /* dreg/creg/greg/immed/symb */
+ struct itbl_range range; /* field's bitfield range within instruction */
+ unsigned long flags; /* field flags */
+ struct itbl_field *next; /* next field in list */
+};
/* These structures define the instructions and registers for a processor.
* If the type is an instruction, the structure defines the format of an
* instruction where the fields are the list of operands.
* The flags field below uses the same values as those defined in the
* gnu assembler and are machine specific. */
-struct itbl_entry
- {
- e_processor processor; /* processor number */
- e_type type; /* dreg/creg/greg/insn */
- char *name; /* mnemionic name for insn/register */
- unsigned long value; /* opcode/instruction mask/register number */
- unsigned long flags; /* effects of the instruction */
- struct itbl_range range; /* bit range within instruction for value */
- struct itbl_field *fields; /* list of operand definitions (if any) */
- struct itbl_entry *next; /* next entry */
- };
+struct itbl_entry {
+ e_processor processor; /* processor number */
+ e_type type; /* dreg/creg/greg/insn */
+ char *name; /* mnemionic name for insn/register */
+ unsigned long value; /* opcode/instruction mask/register number */
+ unsigned long flags; /* effects of the instruction */
+ struct itbl_range range; /* bit range within instruction for value */
+ struct itbl_field *fields; /* list of operand definitions (if any) */
+ struct itbl_entry *next; /* next entry */
+};
/* local data and structures */
static int itbl_num_opcodes = 0;
/* Array of entries for each processor and entry type */
-static struct itbl_entry *entries[e_nprocs][e_ntypes] =
-{
+static struct itbl_entry *entries[e_nprocs][e_ntypes] = {
{0, 0, 0, 0, 0, 0},
{0, 0, 0, 0, 0, 0},
{0, 0, 0, 0, 0, 0},
{
extern FILE *yyin;
extern int yyparse (void);
- yyin = fopen (insntbl, "r");
+
+ yyin = fopen (insntbl, FOPEN_RT);
if (yyin == 0)
{
printf ("Can't open processor instruction specification file \"%s\"\n",
insntbl);
return 1;
}
- else
- {
- while (yyparse ());
- }
+
+ while (yyparse ())
+ ;
+
fclose (yyin);
itbl_have_entries = 1;
return 0;
#include "symbols.h"
static void append_insns_as_macros (void);
-/* initialize for gas */
+/* Initialize for gas. */
+
void
itbl_init (void)
{
e_type type;
if (!itbl_have_entries)
- return;
+ return;
/* Since register names don't have a prefix, put them in the symbol table so
they can't be used as symbols. This simplifies argument parsing as
for (e = *es; e; e = e->next)
{
symbol_table_insert (symbol_create (e->name, reg_section,
- e->value, &zero_address_frag));
+ e->value, &zero_address_frag));
}
}
append_insns_as_macros ();
int n, id, size, new_size, new_num_opcodes;
if (!itbl_have_entries)
- return;
+ return;
if (!itbl_num_opcodes) /* no new instructions to add! */
{
itbl_assemble (char *name, char *s)
{
unsigned long opcode;
- struct itbl_entry *e;
+ struct itbl_entry *e = NULL;
struct itbl_field *f;
char *n;
int processor;
break;
}
if (!e)
- return 0; /* opcode not in table; invalid instrustion */
+ return 0; /* opcode not in table; invalid instruction */
opcode = build_opcode (e);
/* parse opcode's args (if any) */
struct itbl_field *f;
if (!ITBL_IS_INSN (insn))
- return 0; /* error*/
+ return 0; /* error */
processor = get_processor (ITBL_DECODE_PNUM (insn));
/* find entry in list */
e = find_entry_byval (processor, e_insn, insn, 0);
if (!e)
- return 0; /* opcode not in table; invalid instrustion */
+ return 0; /* opcode not in table; invalid instruction */
strcpy (s, e->name);
- /* parse insn's args (if any) */
+ /* Parse insn's args (if any). */
for (f = e->fields; f; f = f->next) /* for each arg, ... */
{
struct itbl_entry *r;
unsigned long value;
- if (f == e->fields) /* first operand is preceeded by tab */
+ if (f == e->fields) /* First operand is preceeded by tab. */
strcat (s, "\t");
- else /* ','s separate following operands */
+ else /* ','s separate following operands. */
strcat (s, ",");
value = extract_range (insn, f->range);
/* n should be in form $n or 0xhhh (are symbol names valid?? */
case e_creg:
case e_greg:
/* Accept either a string name
- * or '$' followed by the register number */
+ or '$' followed by the register number. */
r = find_entry_byval (e->processor, f->type, value, &f->range);
if (r)
strcat (s, r->name);
sprintf (s, "%s$%lu", s, value);
break;
case e_addr:
- /* use assembler's symbol table to find symbol */
- /* FIXME!! Do we need this?
- * if so, what about relocs??
- */
- /* If not a symbol, fall thru to IMMED */
+ /* Use assembler's symbol table to find symbol. */
+ /* FIXME!! Do we need this? If so, what about relocs?? */
+ /* If not a symbol, fall through to IMMED. */
case e_immed:
sprintf (s, "%s0x%lx", s, value);
break;
return 0; /* error; invalid field spec */
}
}
- return 1; /* done! */
+ return 1; /* Done! */
}
/*======================================================================*/
projects / deliverable / binutils-gdb.git / blobdiff