mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2025-02-08 18:28:33 +00:00
* config/tc-d10v.c (find_opcode): Remove unused variable "numops".
* config/tc-tic80.c: Many additions to previous placeholder file.
* config/tc-tic80.h: Ditto.
This commit is contained in:
Fred Fish
parent
f28d34be74
commit
f1ce6af4fe
@ -1,3 +1,11 @@
|
||||
Thu Jan 30 11:46:59 1997 Fred Fish <fnf@cygnus.com>
|
||||
|
||||
* config/tc-d10v.c (find_opcode): Remove unused variable "numops".
|
||||
start-sanitize-tic80
|
||||
* config/tc-tic80.c: Many additions to previous placeholder file.
|
||||
* config/tc-tic80.h: Ditto.
|
||||
end-sanitize-tic80
|
||||
|
||||
Thu Jan 30 12:28:18 1997 Alan Modra <alan@spri.levels.unisa.edu.au>
|
||||
|
||||
* config/tc-i386.c (i386_align_code): Improve the nop patterns.
|
||||
|
||||
@ -1057,11 +1057,11 @@ find_opcode (opcode, myops)
|
||||
struct d10v_opcode *opcode;
|
||||
expressionS myops[];
|
||||
{
|
||||
int i, match, done, numops;
|
||||
int i, match, done;
|
||||
struct d10v_opcode *next_opcode;
|
||||
|
||||
/* get all the operands and save them as expressions */
|
||||
numops = get_operands (myops);
|
||||
get_operands (myops);
|
||||
|
||||
/* now see if the operand is a fake. If so, find the correct size */
|
||||
/* instruction, if possible */
|
||||
|
||||
@ -42,5 +42,608 @@ const char EXP_CHARS[] = "eE";
|
||||
as in 0d1.0. */
|
||||
const char FLT_CHARS[] = "dD";
|
||||
|
||||
/* This table describes all the machine specific pseudo-ops the assembler
|
||||
has to support. The fields are:
|
||||
pseudo-op name without dot
|
||||
function to call to execute this pseudo-op
|
||||
Integer arg to pass to the function
|
||||
*/
|
||||
|
||||
const pseudo_typeS md_pseudo_table[] =
|
||||
{
|
||||
{"word", cons, 4},
|
||||
{ NULL, NULL, 0 }
|
||||
};
|
||||
|
||||
/* Opcode hash table. */
|
||||
static struct hash_control *tic80_hash;
|
||||
|
||||
static struct tic80_opcode * find_opcode PARAMS ((struct tic80_opcode *, expressionS []));
|
||||
static unsigned long build_insn PARAMS ((struct tic80_opcode *, expressionS *, unsigned long insn));
|
||||
static int get_operands PARAMS ((expressionS exp[]));
|
||||
static int reg_name_search PARAMS ((char *name));
|
||||
static int register_name PARAMS ((expressionS *expressionP));
|
||||
|
||||
|
||||
int
|
||||
md_estimate_size_before_relax (fragP, segment_type)
|
||||
fragS *fragP;
|
||||
segT segment_type;
|
||||
{
|
||||
as_fatal ("Relaxation is a luxury we can't afford\n");
|
||||
return (-1);
|
||||
}
|
||||
|
||||
/* We have no need to default values of symbols. */
|
||||
|
||||
/* ARGSUSED */
|
||||
symbolS *
|
||||
md_undefined_symbol (name)
|
||||
char *name;
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Turn a string in input_line_pointer into a floating point constant of type
|
||||
type, and store the appropriate bytes in *litP. The number of LITTLENUMS
|
||||
emitted is stored in *sizeP . An error message is returned, or NULL on OK.
|
||||
*/
|
||||
|
||||
#define MAX_LITTLENUMS 4
|
||||
|
||||
char *
|
||||
md_atof (type, litP, sizeP)
|
||||
int type;
|
||||
char *litP;
|
||||
int *sizeP;
|
||||
{
|
||||
int prec;
|
||||
LITTLENUM_TYPE words[MAX_LITTLENUMS];
|
||||
LITTLENUM_TYPE *wordP;
|
||||
char *t;
|
||||
char *atof_ieee ();
|
||||
|
||||
switch (type)
|
||||
{
|
||||
case 'f':
|
||||
case 'F':
|
||||
case 's':
|
||||
case 'S':
|
||||
prec = 2;
|
||||
break;
|
||||
|
||||
case 'd':
|
||||
case 'D':
|
||||
case 'r':
|
||||
case 'R':
|
||||
prec = 4;
|
||||
break;
|
||||
|
||||
default:
|
||||
*sizeP = 0;
|
||||
return "bad call to md_atof ()";
|
||||
}
|
||||
|
||||
t = atof_ieee (input_line_pointer, type, words);
|
||||
if (t)
|
||||
{
|
||||
input_line_pointer = t;
|
||||
}
|
||||
|
||||
*sizeP = prec * sizeof (LITTLENUM_TYPE);
|
||||
|
||||
for (wordP = words; prec--;)
|
||||
{
|
||||
md_number_to_chars (litP, (valueT) (*wordP++), sizeof (LITTLENUM_TYPE));
|
||||
litP += sizeof (LITTLENUM_TYPE);
|
||||
}
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
/* reg_name_search does a binary search of the tic80_pre_defined_registers
|
||||
array to see if "name" is a valid regiter name. Returns the register
|
||||
number from the array on success, or -1 on failure. */
|
||||
|
||||
static int
|
||||
reg_name_search (name)
|
||||
char *name;
|
||||
{
|
||||
int middle, low, high;
|
||||
int cmp;
|
||||
|
||||
low = 0;
|
||||
high = tic80_num_regs - 1;
|
||||
|
||||
do
|
||||
{
|
||||
middle = (low + high) / 2;
|
||||
cmp = strcasecmp (name, tic80_pre_defined_registers[middle].name);
|
||||
if (cmp < 0)
|
||||
{
|
||||
high = middle - 1;
|
||||
}
|
||||
else if (cmp > 0)
|
||||
{
|
||||
low = middle + 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
return (tic80_pre_defined_registers[middle].value);
|
||||
}
|
||||
}
|
||||
while (low <= high);
|
||||
return (-1);
|
||||
}
|
||||
|
||||
/* register_name() checks the string at input_line_pointer
|
||||
to see if it is a valid register name */
|
||||
|
||||
static int
|
||||
register_name (expressionP)
|
||||
expressionS *expressionP;
|
||||
{
|
||||
int reg_number;
|
||||
char c;
|
||||
char *p = input_line_pointer;
|
||||
|
||||
while (*p != '\000' && *p != '\n' && *p != '\r' && *p != ',' && *p != ' ' && *p != ')')
|
||||
p++;
|
||||
|
||||
c = *p;
|
||||
if (c)
|
||||
{
|
||||
*p++ = '\000';
|
||||
}
|
||||
|
||||
/* look to see if it's in the register table */
|
||||
|
||||
reg_number = reg_name_search (input_line_pointer);
|
||||
if (reg_number >= 0)
|
||||
{
|
||||
expressionP -> X_op = O_register;
|
||||
/* temporarily store a pointer to the string here */
|
||||
expressionP -> X_op_symbol = (struct symbol *) input_line_pointer;
|
||||
expressionP -> X_add_number = reg_number;
|
||||
input_line_pointer = p;
|
||||
return (1);
|
||||
}
|
||||
if (c)
|
||||
{
|
||||
*(p - 1) = c;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
/* get_operands() parses a string of operands and fills in a passed array of
|
||||
expressions in EXP.
|
||||
|
||||
Note that we use O_absent expressions to record additional information
|
||||
about the previous non-O_absent expression, such as ":m" or ":s"
|
||||
modifiers or register numbers enclosed in parens like "(r10)".
|
||||
|
||||
Returns the number of expressions that were placed in EXP.
|
||||
|
||||
*/
|
||||
|
||||
static int
|
||||
get_operands (exp)
|
||||
expressionS exp[];
|
||||
{
|
||||
char *p = input_line_pointer;
|
||||
int numexp = 0;
|
||||
int mflag = 0;
|
||||
int sflag = 0;
|
||||
int parens = 0;
|
||||
|
||||
while (*p)
|
||||
{
|
||||
/* Skip leading whitespace */
|
||||
while (*p == ' ' || *p == '\t' || *p == ',')
|
||||
{
|
||||
p++;
|
||||
}
|
||||
|
||||
/* Check to see if we have any operands left to parse */
|
||||
if (*p == 0 || *p == '\n' || *p == '\r')
|
||||
{
|
||||
break;
|
||||
}
|
||||
|
||||
/* Notice scaling or direct memory operand modifiers and save them in
|
||||
an O_absent expression after the expression that they modify. */
|
||||
|
||||
if (*p == ':')
|
||||
{
|
||||
p++;
|
||||
exp[numexp].X_op = O_absent;
|
||||
if (*p == 'm')
|
||||
{
|
||||
p++;
|
||||
exp[numexp].X_add_number = TIC80_OPERAND_M_SI | TIC80_OPERAND_M_LI;
|
||||
}
|
||||
else if (*p == 's')
|
||||
{
|
||||
p++;
|
||||
exp[numexp].X_add_number = TIC80_OPERAND_SCALED;
|
||||
}
|
||||
else
|
||||
{
|
||||
as_bad ("':' not followed by 'm' or 's'");
|
||||
}
|
||||
numexp++;
|
||||
continue;
|
||||
}
|
||||
|
||||
/* Handle leading '(' on operands that use them, by recording that we
|
||||
have entered a paren nesting level and then continuing. We complain
|
||||
about multiple nesting. */
|
||||
|
||||
if (*p == '(')
|
||||
{
|
||||
if (++parens != 1)
|
||||
{
|
||||
as_bad ("paren nesting");
|
||||
}
|
||||
p++;
|
||||
continue;
|
||||
}
|
||||
|
||||
/* Handle trailing ')' on operands that use them, by reducing the
|
||||
nesting level and then continuing. We complain if there were too
|
||||
many closures. */
|
||||
|
||||
if (*p == ')')
|
||||
{
|
||||
/* Record that we have left a paren group and continue */
|
||||
if (--parens < 0)
|
||||
{
|
||||
as_bad ("mismatched parenthesis");
|
||||
}
|
||||
p++;
|
||||
continue;
|
||||
}
|
||||
|
||||
/* Begin operand parsing at the current scan point. */
|
||||
|
||||
input_line_pointer = p;
|
||||
|
||||
/* Check to see if it might be a register name */
|
||||
|
||||
if (!register_name (&exp[numexp]))
|
||||
{
|
||||
/* parse as an expression */
|
||||
expression (&exp[numexp]);
|
||||
}
|
||||
|
||||
if (exp[numexp].X_op == O_illegal)
|
||||
{
|
||||
as_bad ("illegal operand");
|
||||
}
|
||||
else if (exp[numexp].X_op == O_absent)
|
||||
{
|
||||
as_bad ("missing operand");
|
||||
}
|
||||
|
||||
numexp++;
|
||||
p = input_line_pointer;
|
||||
}
|
||||
|
||||
if (parens)
|
||||
{
|
||||
exp[numexp].X_op = O_absent;
|
||||
exp[numexp++].X_add_number = TIC80_OPERAND_PARENS;
|
||||
}
|
||||
|
||||
exp[numexp].X_op = 0;
|
||||
return (numexp);
|
||||
}
|
||||
|
||||
/* find_opcode() gets a pointer to the entry in the opcode table that
|
||||
matches the instruction being assembled, or returns NULL if no such match
|
||||
is found.
|
||||
|
||||
First it parses all the operands and save them as expressions. Note that
|
||||
we use O_absent expressions to record additional information about the
|
||||
previous non-O_absent expression, such as ":m" or ":s" modifiers or
|
||||
register numbers enclosed in parens like "(r10)".
|
||||
|
||||
It then looks at all opcodes with the same name and use the operands to
|
||||
choose the correct opcode. */
|
||||
|
||||
|
||||
static struct tic80_opcode *
|
||||
find_opcode (opcode, myops)
|
||||
struct tic80_opcode *opcode;
|
||||
expressionS myops[];
|
||||
{
|
||||
int i, match, done, numops;
|
||||
struct tic80_opcode *next_opcode;
|
||||
|
||||
match = 0;
|
||||
|
||||
/* First parse all the operands so we only have to do it once. */
|
||||
|
||||
get_operands (myops);
|
||||
|
||||
/* Now search the opcode table table for one with operands that
|
||||
matches what we've got. */
|
||||
|
||||
while (!match)
|
||||
{
|
||||
match = 1;
|
||||
for (i = 0; opcode -> operands[i]; i++)
|
||||
{
|
||||
int flags = tic80_operands[opcode->operands[i]].flags;
|
||||
int X_op = myops[i].X_op;
|
||||
int num = myops[i].X_add_number;
|
||||
|
||||
if (X_op == 0)
|
||||
{
|
||||
match = 0;
|
||||
break;
|
||||
}
|
||||
|
||||
if (flags & TIC80_OPERAND_GPR)
|
||||
{
|
||||
if ((X_op != O_register) ||
|
||||
((flags & OPERAND_ACC) != (num & OPERAND_ACC)) ||
|
||||
((flags & OPERAND_FLAG) != (num & OPERAND_FLAG)) ||
|
||||
((flags & OPERAND_CONTROL) != (num & OPERAND_CONTROL)))
|
||||
{
|
||||
match=0;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (((flags & OPERAND_MINUS) && ((X_op != O_absent) || (num != OPERAND_MINUS))) ||
|
||||
((flags & OPERAND_PLUS) && ((X_op != O_absent) || (num != OPERAND_PLUS))) ||
|
||||
((flags & OPERAND_ATMINUS) && ((X_op != O_absent) || (num != OPERAND_ATMINUS))) ||
|
||||
((flags & OPERAND_ATPAR) && ((X_op != O_absent) || (num != OPERAND_ATPAR))) ||
|
||||
((flags & OPERAND_ATSIGN) && ((X_op != O_absent) || (num != OPERAND_ATSIGN))))
|
||||
{
|
||||
match=0;
|
||||
break;
|
||||
}
|
||||
}
|
||||
/* we're only done if the operands matched so far AND there
|
||||
are no more to check */
|
||||
if (match && myops[i].X_op==0)
|
||||
break;
|
||||
else
|
||||
match = 0;
|
||||
|
||||
next_opcode = opcode+1;
|
||||
if (next_opcode->opcode == 0)
|
||||
break;
|
||||
if (strcmp(next_opcode->name, opcode->name))
|
||||
break;
|
||||
opcode = next_opcode;
|
||||
}
|
||||
|
||||
if (!match)
|
||||
{
|
||||
as_bad ("bad opcode or operands");
|
||||
return (0);
|
||||
}
|
||||
|
||||
/* Check that all registers that are required to be even are. */
|
||||
/* Also, if any operands were marked as registers, but were really symbols */
|
||||
/* fix that here. */
|
||||
for (i=0; opcode->operands[i]; i++)
|
||||
{
|
||||
if ((tic80_operands[opcode->operands[i]].flags & OPERAND_EVEN) &&
|
||||
(myops[i].X_add_number & 1))
|
||||
as_fatal("Register number must be EVEN");
|
||||
if (myops[i].X_op == O_register)
|
||||
{
|
||||
if (!(tic80_operands[opcode->operands[i]].flags & OPERAND_REG))
|
||||
{
|
||||
myops[i].X_op = O_symbol;
|
||||
myops[i].X_add_symbol = symbol_find_or_make ((char *)myops[i].X_op_symbol);
|
||||
myops[i].X_add_number = 0;
|
||||
myops[i].X_op_symbol = NULL;
|
||||
}
|
||||
}
|
||||
}
|
||||
return opcode;
|
||||
}
|
||||
|
||||
/* build_insn takes a pointer to the opcode entry in the opcode table
|
||||
and the array of operand expressions and returns the instruction */
|
||||
|
||||
static unsigned long
|
||||
build_insn (opcode, opers, insn)
|
||||
struct tic80_opcode *opcode;
|
||||
expressionS *opers;
|
||||
unsigned long insn;
|
||||
{
|
||||
return (0);
|
||||
}
|
||||
|
||||
/* This is the main entry point for the machine-dependent assembler. STR points to a
|
||||
machine dependent instruction. This function is supposed to emit the frags/bytes
|
||||
it assembles to.
|
||||
*/
|
||||
|
||||
void
|
||||
md_assemble (str)
|
||||
char *str;
|
||||
{
|
||||
char *scan;
|
||||
unsigned char *input_line_save;
|
||||
struct tic80_opcode *opcode;
|
||||
expressionS myops[6];
|
||||
unsigned long insn;
|
||||
|
||||
/* Ensure there is something there to assemble. */
|
||||
assert (str);
|
||||
|
||||
/* Drop any leading whitespace. */
|
||||
while (isspace (*str))
|
||||
{
|
||||
str++;
|
||||
}
|
||||
|
||||
/* Isolate the mnemonic from the rest of the string by finding the first
|
||||
whitespace character and zapping it to a null byte. */
|
||||
for (scan = str; *scan != '\000' && !isspace (*scan); scan++) {;}
|
||||
if (*scan != '\000')
|
||||
{
|
||||
*scan++ = '\000';
|
||||
}
|
||||
|
||||
/* Try to find this mnemonic in the hash table */
|
||||
if ((opcode = (struct tic80_opcode *) hash_find (tic80_hash, str)) == NULL)
|
||||
{
|
||||
as_bad ("Invalid mnemonic: '%s'", str);
|
||||
return;
|
||||
}
|
||||
|
||||
str = scan;
|
||||
while (isspace (*scan))
|
||||
{
|
||||
scan++;
|
||||
}
|
||||
|
||||
input_line_save = input_line_pointer;
|
||||
input_line_pointer = str;
|
||||
|
||||
opcode = find_opcode (opcode, myops);
|
||||
if (opcode == NULL)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
input_line_pointer = input_line_save;
|
||||
insn = build_insn (opcode, myops, 0);
|
||||
|
||||
/* FIXME - finish this */
|
||||
}
|
||||
|
||||
/* This function is called once, at assembler startup time. It should
|
||||
set up all the tables, etc., that the MD part of the assembler will
|
||||
need. */
|
||||
|
||||
void
|
||||
md_begin ()
|
||||
{
|
||||
char *prev_name = "";
|
||||
register const struct tic80_opcode *op;
|
||||
register const struct tic80_opcode *op_end;
|
||||
|
||||
tic80_hash = hash_new();
|
||||
|
||||
/* Insert unique names into hash table. The TIc80 instruction set
|
||||
has many identical opcode names that have different opcodes based
|
||||
on the operands. This hash table then provides a quick index to
|
||||
the first opcode with a particular name in the opcode table. */
|
||||
|
||||
op_end = tic80_opcodes + tic80_num_opcodes;
|
||||
for (op = tic80_opcodes; op < op_end; op++)
|
||||
{
|
||||
if (strcmp (prev_name, op -> name) != 0)
|
||||
{
|
||||
prev_name = (char *) op -> name;
|
||||
hash_insert (tic80_hash, op -> name, (char *) op);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
CONST char *md_shortopts = "";
|
||||
|
||||
struct option md_longopts[] = {
|
||||
{NULL, no_argument, NULL, 0}
|
||||
};
|
||||
|
||||
size_t md_longopts_size = sizeof(md_longopts);
|
||||
|
||||
/* Take care of the target-specific command-line options. */
|
||||
|
||||
int
|
||||
md_parse_option (c, arg)
|
||||
int c;
|
||||
char *arg;
|
||||
{
|
||||
return (0);
|
||||
}
|
||||
|
||||
/* Print a description of the command-line options that we accept. */
|
||||
|
||||
void
|
||||
md_show_usage (stream)
|
||||
FILE *stream;
|
||||
{
|
||||
}
|
||||
|
||||
|
||||
/* Attempt to simplify or even eliminate a fixup. The return value is
|
||||
ignored; perhaps it was once meaningful, but now it is historical.
|
||||
To indicate that a fixup has been eliminated, set fixP->fx_done.
|
||||
*/
|
||||
|
||||
void
|
||||
md_apply_fix (fixP, val)
|
||||
fixS *fixP;
|
||||
long val;
|
||||
{
|
||||
as_fatal ("md_apply_fix() not implemented yet\n");
|
||||
abort ();
|
||||
}
|
||||
|
||||
|
||||
/* Functions concerning relocs. */
|
||||
|
||||
/* The location from which a PC relative jump should be calculated,
|
||||
given a PC relative reloc. */
|
||||
|
||||
long
|
||||
md_pcrel_from (fixP)
|
||||
fixS *fixP;
|
||||
{
|
||||
as_fatal ("md_pcrel_from() not implemented yet\n");
|
||||
abort ();
|
||||
}
|
||||
|
||||
/*
|
||||
* Called after relax() is finished.
|
||||
* In: Address of frag.
|
||||
* fr_type == rs_machine_dependent.
|
||||
* fr_subtype is what the address relaxed to.
|
||||
*
|
||||
* Out: Any fixSs and constants are set up.
|
||||
* Caller will turn frag into a ".space 0".
|
||||
*/
|
||||
|
||||
void
|
||||
md_convert_frag (headers, seg, fragP)
|
||||
object_headers *headers;
|
||||
segT seg;
|
||||
fragS *fragP;
|
||||
{
|
||||
as_fatal ("md_convert_frag() not implemented yet\n");
|
||||
abort ();
|
||||
}
|
||||
|
||||
|
||||
/*ARGSUSED*/
|
||||
void
|
||||
tc_coff_symbol_emit_hook (ignore)
|
||||
symbolS *ignore;
|
||||
{
|
||||
}
|
||||
|
||||
#if defined OBJ_COFF
|
||||
|
||||
short
|
||||
tc_coff_fix2rtype (fixP)
|
||||
fixS *fixP;
|
||||
{
|
||||
as_fatal ("tc_coff_fix2rtype() not implemented yet\n");
|
||||
abort ();
|
||||
}
|
||||
|
||||
#endif /* OBJ_COFF */
|
||||
|
||||
/* end of tc-tic80.c */
|
||||
|
||||
@ -22,6 +22,24 @@
|
||||
|
||||
#define TARGET_ARCH bfd_arch_tic80
|
||||
#define BFD_ARCH TARGET_ARCH
|
||||
#define COFF_MAGIC TIC80MAGIC
|
||||
|
||||
#define md_number_to_chars number_to_chars_littleendian
|
||||
|
||||
/* We have no special operand handling. */
|
||||
#define md_operand(x)
|
||||
|
||||
#ifdef OBJ_COFF
|
||||
/* COFF specific definitions. */
|
||||
|
||||
#define COFF_MAGIC TIC80_ARCH_MAGIC
|
||||
|
||||
/* Whether a reloc should be output. */
|
||||
#define TC_COUNT_RELOC(fixp) ((fixp) -> fx_addsy != NULL)
|
||||
|
||||
/* This macro translates between an internal fix and an coff reloc type */
|
||||
#define TC_COFF_FIX2RTYPE(fixP) tc_coff_fix2rtype(fixP)
|
||||
extern short tc_coff_fix2rtype ();
|
||||
|
||||
#endif /* OBJ_COFF */
|
||||
|
||||
/* end of tc-tic80.h */
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user