NetBSD/gnu/dist/gas/config/tc-mn10200.c

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/* tc-mn10200.c -- Assembler code for the Matsushita 10200
Copyright (C) 1996, 1997 Free Software Foundation.
This file is part of GAS, the GNU Assembler.
GAS 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.
GAS 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 GAS; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <stdio.h>
#include <ctype.h>
#include "as.h"
#include "subsegs.h"
#include "opcode/mn10200.h"
/* Structure to hold information about predefined registers. */
struct reg_name
{
const char *name;
int value;
};
/* Generic assembler global variables which must be defined by all targets. */
/* Characters which always start a comment. */
const char comment_chars[] = "#";
/* Characters which start a comment at the beginning of a line. */
const char line_comment_chars[] = ";#";
/* Characters which may be used to separate multiple commands on a
single line. */
const char line_separator_chars[] = ";";
/* Characters which are used to indicate an exponent in a floating
point number. */
const char EXP_CHARS[] = "eE";
/* Characters which mean that a number is a floating point constant,
as in 0d1.0. */
const char FLT_CHARS[] = "dD";
const relax_typeS md_relax_table[] = {
/* bCC relaxing */
{0x81, -0x7e, 2, 1},
{0x8004, -0x7ffb, 5, 2},
{0x800006, -0x7ffff9, 7, 0},
/* bCCx relaxing */
{0x81, -0x7e, 3, 4},
{0x8004, -0x7ffb, 6, 5},
{0x800006, -0x7ffff9, 8, 0},
/* jsr relaxing */
{0x8004, -0x7ffb, 3, 7},
{0x800006, -0x7ffff9, 5, 0},
/* jmp relaxing */
{0x81, -0x7e, 2, 9},
{0x8004, -0x7ffb, 3, 10},
{0x800006, -0x7ffff9, 5, 0},
};
/* local functions */
static void mn10200_insert_operand PARAMS ((unsigned long *, unsigned long *,
const struct mn10200_operand *,
offsetT, char *, unsigned,
unsigned));
static unsigned long check_operand PARAMS ((unsigned long,
const struct mn10200_operand *,
offsetT));
static int reg_name_search PARAMS ((const struct reg_name *, int, const char *));
static boolean data_register_name PARAMS ((expressionS *expressionP));
static boolean address_register_name PARAMS ((expressionS *expressionP));
static boolean other_register_name PARAMS ((expressionS *expressionP));
/* fixups */
#define MAX_INSN_FIXUPS (5)
struct mn10200_fixup
{
expressionS exp;
int opindex;
bfd_reloc_code_real_type reloc;
};
struct mn10200_fixup fixups[MAX_INSN_FIXUPS];
static int fc;
const char *md_shortopts = "";
struct option md_longopts[] = {
{NULL, no_argument, NULL, 0}
};
size_t md_longopts_size = sizeof(md_longopts);
/* The target specific pseudo-ops which we support. */
const pseudo_typeS md_pseudo_table[] =
{
{ NULL, NULL, 0 }
};
/* Opcode hash table. */
static struct hash_control *mn10200_hash;
/* This table is sorted. Suitable for searching by a binary search. */
static const struct reg_name data_registers[] =
{
{ "d0", 0 },
{ "d1", 1 },
{ "d2", 2 },
{ "d3", 3 },
};
#define DATA_REG_NAME_CNT (sizeof(data_registers) / sizeof(struct reg_name))
static const struct reg_name address_registers[] =
{
{ "a0", 0 },
{ "a1", 1 },
{ "a2", 2 },
{ "a3", 3 },
};
#define ADDRESS_REG_NAME_CNT (sizeof(address_registers) / sizeof(struct reg_name))
static const struct reg_name other_registers[] =
{
{ "mdr", 0 },
{ "psw", 0 },
};
#define OTHER_REG_NAME_CNT (sizeof(other_registers) / sizeof(struct reg_name))
/* reg_name_search does a binary search of the given register table
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 (regs, regcount, name)
const struct reg_name *regs;
int regcount;
const char *name;
{
int middle, low, high;
int cmp;
low = 0;
high = regcount - 1;
do
{
middle = (low + high) / 2;
cmp = strcasecmp (name, regs[middle].name);
if (cmp < 0)
high = middle - 1;
else if (cmp > 0)
low = middle + 1;
else
return regs[middle].value;
}
while (low <= high);
return -1;
}
/* Summary of register_name().
*
* in: Input_line_pointer points to 1st char of operand.
*
* out: A expressionS.
* The operand may have been a register: in this case, X_op == O_register,
* X_add_number is set to the register number, and truth is returned.
* Input_line_pointer->(next non-blank) char after operand, or is in
* its original state.
*/
static boolean
data_register_name (expressionP)
expressionS *expressionP;
{
int reg_number;
char *name;
char *start;
char c;
/* Find the spelling of the operand */
start = name = input_line_pointer;
c = get_symbol_end ();
reg_number = reg_name_search (data_registers, DATA_REG_NAME_CNT, name);
/* look to see if it's in the register table */
if (reg_number >= 0)
{
expressionP->X_op = O_register;
expressionP->X_add_number = reg_number;
/* make the rest nice */
expressionP->X_add_symbol = NULL;
expressionP->X_op_symbol = NULL;
*input_line_pointer = c; /* put back the delimiting char */
return true;
}
else
{
/* reset the line as if we had not done anything */
*input_line_pointer = c; /* put back the delimiting char */
input_line_pointer = start; /* reset input_line pointer */
return false;
}
}
/* Summary of register_name().
*
* in: Input_line_pointer points to 1st char of operand.
*
* out: A expressionS.
* The operand may have been a register: in this case, X_op == O_register,
* X_add_number is set to the register number, and truth is returned.
* Input_line_pointer->(next non-blank) char after operand, or is in
* its original state.
*/
static boolean
address_register_name (expressionP)
expressionS *expressionP;
{
int reg_number;
char *name;
char *start;
char c;
/* Find the spelling of the operand */
start = name = input_line_pointer;
c = get_symbol_end ();
reg_number = reg_name_search (address_registers, ADDRESS_REG_NAME_CNT, name);
/* look to see if it's in the register table */
if (reg_number >= 0)
{
expressionP->X_op = O_register;
expressionP->X_add_number = reg_number;
/* make the rest nice */
expressionP->X_add_symbol = NULL;
expressionP->X_op_symbol = NULL;
*input_line_pointer = c; /* put back the delimiting char */
return true;
}
else
{
/* reset the line as if we had not done anything */
*input_line_pointer = c; /* put back the delimiting char */
input_line_pointer = start; /* reset input_line pointer */
return false;
}
}
/* Summary of register_name().
*
* in: Input_line_pointer points to 1st char of operand.
*
* out: A expressionS.
* The operand may have been a register: in this case, X_op == O_register,
* X_add_number is set to the register number, and truth is returned.
* Input_line_pointer->(next non-blank) char after operand, or is in
* its original state.
*/
static boolean
other_register_name (expressionP)
expressionS *expressionP;
{
int reg_number;
char *name;
char *start;
char c;
/* Find the spelling of the operand */
start = name = input_line_pointer;
c = get_symbol_end ();
reg_number = reg_name_search (other_registers, OTHER_REG_NAME_CNT, name);
/* look to see if it's in the register table */
if (reg_number >= 0)
{
expressionP->X_op = O_register;
expressionP->X_add_number = reg_number;
/* make the rest nice */
expressionP->X_add_symbol = NULL;
expressionP->X_op_symbol = NULL;
*input_line_pointer = c; /* put back the delimiting char */
return true;
}
else
{
/* reset the line as if we had not done anything */
*input_line_pointer = c; /* put back the delimiting char */
input_line_pointer = start; /* reset input_line pointer */
return false;
}
}
void
md_show_usage (stream)
FILE *stream;
{
fprintf(stream, "MN10200 options:\n\
none yet\n");
}
int
md_parse_option (c, arg)
int c;
char *arg;
{
return 0;
}
symbolS *
md_undefined_symbol (name)
char *name;
{
return 0;
}
char *
md_atof (type, litp, sizep)
int type;
char *litp;
int *sizep;
{
int prec;
LITTLENUM_TYPE words[4];
char *t;
int i;
switch (type)
{
case 'f':
prec = 2;
break;
case 'd':
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 * 2;
for (i = prec - 1; i >= 0; i--)
{
md_number_to_chars (litp, (valueT) words[i], 2);
litp += 2;
}
return NULL;
}
void
md_convert_frag (abfd, sec, fragP)
bfd *abfd;
asection *sec;
fragS *fragP;
{
static unsigned long label_count = 0;
char buf[40];
subseg_change (sec, 0);
if (fragP->fr_subtype == 0)
{
fix_new (fragP, fragP->fr_fix + 1, 1, fragP->fr_symbol,
fragP->fr_offset, 1, BFD_RELOC_8_PCREL);
fragP->fr_var = 0;
fragP->fr_fix += 2;
}
else if (fragP->fr_subtype == 1)
{
/* Reverse the condition of the first branch. */
int offset = fragP->fr_fix;
int opcode = fragP->fr_literal[offset] & 0xff;
switch (opcode)
{
case 0xe8:
opcode = 0xe9;
break;
case 0xe9:
opcode = 0xe8;
break;
case 0xe0:
opcode = 0xe2;
break;
case 0xe2:
opcode = 0xe0;
break;
case 0xe3:
opcode = 0xe1;
break;
case 0xe1:
opcode = 0xe3;
break;
case 0xe4:
opcode = 0xe6;
break;
case 0xe6:
opcode = 0xe4;
break;
case 0xe7:
opcode = 0xe5;
break;
case 0xe5:
opcode = 0xe7;
break;
default:
abort ();
}
fragP->fr_literal[offset] = opcode;
/* Create a fixup for the reversed conditional branch. */
sprintf (buf, ".%s_%d", FAKE_LABEL_NAME, label_count++);
fix_new (fragP, fragP->fr_fix + 1, 1,
symbol_new (buf, sec, 0, fragP->fr_next),
fragP->fr_offset, 1, BFD_RELOC_8_PCREL);
/* Now create the unconditional branch + fixup to the
final target. */
fragP->fr_literal[offset + 2] = 0xfc;
fix_new (fragP, fragP->fr_fix + 3, 2, fragP->fr_symbol,
fragP->fr_offset, 1, BFD_RELOC_16_PCREL);
fragP->fr_var = 0;
fragP->fr_fix += 5;
}
else if (fragP->fr_subtype == 2)
{
/* Reverse the condition of the first branch. */
int offset = fragP->fr_fix;
int opcode = fragP->fr_literal[offset] & 0xff;
switch (opcode)
{
case 0xe8:
opcode = 0xe9;
break;
case 0xe9:
opcode = 0xe8;
break;
case 0xe0:
opcode = 0xe2;
break;
case 0xe2:
opcode = 0xe0;
break;
case 0xe3:
opcode = 0xe1;
break;
case 0xe1:
opcode = 0xe3;
break;
case 0xe4:
opcode = 0xe6;
break;
case 0xe6:
opcode = 0xe4;
break;
case 0xe7:
opcode = 0xe5;
break;
case 0xe5:
opcode = 0xe7;
break;
default:
abort ();
}
fragP->fr_literal[offset] = opcode;
/* Create a fixup for the reversed conditional branch. */
sprintf (buf, ".%s_%d", FAKE_LABEL_NAME, label_count++);
fix_new (fragP, fragP->fr_fix + 1, 1,
symbol_new (buf, sec, 0, fragP->fr_next),
fragP->fr_offset, 1, BFD_RELOC_8_PCREL);
/* Now create the unconditional branch + fixup to the
final target. */
fragP->fr_literal[offset + 2] = 0xf4;
fragP->fr_literal[offset + 3] = 0xe0;
fix_new (fragP, fragP->fr_fix + 4, 4, fragP->fr_symbol,
fragP->fr_offset, 1, BFD_RELOC_24_PCREL);
fragP->fr_var = 0;
fragP->fr_fix += 7;
}
else if (fragP->fr_subtype == 3)
{
fix_new (fragP, fragP->fr_fix + 2, 1, fragP->fr_symbol,
fragP->fr_offset, 1, BFD_RELOC_8_PCREL);
fragP->fr_var = 0;
fragP->fr_fix += 3;
}
else if (fragP->fr_subtype == 4)
{
/* Reverse the condition of the first branch. */
int offset = fragP->fr_fix;
int opcode = fragP->fr_literal[offset + 1] & 0xff;
switch (opcode)
{
case 0xfc:
opcode = 0xfd;
break;
case 0xfd:
opcode = 0xfc;
break;
case 0xfe:
opcode = 0xff;
break;
case 0xff:
opcode = 0xfe;
case 0xe8:
opcode = 0xe9;
break;
case 0xe9:
opcode = 0xe8;
break;
case 0xe0:
opcode = 0xe2;
break;
case 0xe2:
opcode = 0xe0;
break;
case 0xe3:
opcode = 0xe1;
break;
case 0xe1:
opcode = 0xe3;
break;
case 0xe4:
opcode = 0xe6;
break;
case 0xe6:
opcode = 0xe4;
break;
case 0xe7:
opcode = 0xe5;
break;
case 0xe5:
opcode = 0xe7;
break;
case 0xec:
opcode = 0xed;
break;
case 0xed:
opcode = 0xec;
break;
case 0xee:
opcode = 0xef;
break;
case 0xef:
opcode = 0xee;
break;
default:
abort ();
}
fragP->fr_literal[offset + 1] = opcode;
/* Create a fixup for the reversed conditional branch. */
sprintf (buf, ".%s_%d", FAKE_LABEL_NAME, label_count++);
fix_new (fragP, fragP->fr_fix + 2, 1,
symbol_new (buf, sec, 0, fragP->fr_next),
fragP->fr_offset, 1, BFD_RELOC_8_PCREL);
/* Now create the unconditional branch + fixup to the
final target. */
fragP->fr_literal[offset + 3] = 0xfc;
fix_new (fragP, fragP->fr_fix + 4, 2, fragP->fr_symbol,
fragP->fr_offset, 1, BFD_RELOC_16_PCREL);
fragP->fr_var = 0;
fragP->fr_fix += 6;
}
else if (fragP->fr_subtype == 5)
{
/* Reverse the condition of the first branch. */
int offset = fragP->fr_fix;
int opcode = fragP->fr_literal[offset + 1] & 0xff;
switch (opcode)
{
case 0xfc:
opcode = 0xfd;
break;
case 0xfd:
opcode = 0xfc;
break;
case 0xfe:
opcode = 0xff;
break;
case 0xff:
opcode = 0xfe;
case 0xe8:
opcode = 0xe9;
break;
case 0xe9:
opcode = 0xe8;
break;
case 0xe0:
opcode = 0xe2;
break;
case 0xe2:
opcode = 0xe0;
break;
case 0xe3:
opcode = 0xe1;
break;
case 0xe1:
opcode = 0xe3;
break;
case 0xe4:
opcode = 0xe6;
break;
case 0xe6:
opcode = 0xe4;
break;
case 0xe7:
opcode = 0xe5;
break;
case 0xe5:
opcode = 0xe7;
break;
case 0xec:
opcode = 0xed;
break;
case 0xed:
opcode = 0xec;
break;
case 0xee:
opcode = 0xef;
break;
case 0xef:
opcode = 0xee;
break;
default:
abort ();
}
fragP->fr_literal[offset + 1] = opcode;
/* Create a fixup for the reversed conditional branch. */
sprintf (buf, ".%s_%d", FAKE_LABEL_NAME, label_count++);
fix_new (fragP, fragP->fr_fix + 2, 1,
symbol_new (buf, sec, 0, fragP->fr_next),
fragP->fr_offset, 1, BFD_RELOC_8_PCREL);
/* Now create the unconditional branch + fixup to the
final target. */
fragP->fr_literal[offset + 3] = 0xf4;
fragP->fr_literal[offset + 4] = 0xe0;
fix_new (fragP, fragP->fr_fix + 5, 4, fragP->fr_symbol,
fragP->fr_offset, 1, BFD_RELOC_24_PCREL);
fragP->fr_var = 0;
fragP->fr_fix += 8;
}
else if (fragP->fr_subtype == 6)
{
fix_new (fragP, fragP->fr_fix + 1, 2, fragP->fr_symbol,
fragP->fr_offset, 1, BFD_RELOC_16_PCREL);
fragP->fr_var = 0;
fragP->fr_fix += 3;
}
else if (fragP->fr_subtype == 7)
{
int offset = fragP->fr_fix;
fragP->fr_literal[offset] = 0xf4;
fragP->fr_literal[offset + 1] = 0xe1;
fix_new (fragP, fragP->fr_fix + 2, 4, fragP->fr_symbol,
fragP->fr_offset, 1, BFD_RELOC_24_PCREL);
fragP->fr_var = 0;
fragP->fr_fix += 5;
}
else if (fragP->fr_subtype == 8)
{
fragP->fr_literal[fragP->fr_fix] = 0xea;
fix_new (fragP, fragP->fr_fix + 1, 1, fragP->fr_symbol,
fragP->fr_offset, 1, BFD_RELOC_8_PCREL);
fragP->fr_var = 0;
fragP->fr_fix += 2;
}
else if (fragP->fr_subtype == 9)
{
int offset = fragP->fr_fix;
fragP->fr_literal[offset] = 0xfc;
fix_new (fragP, fragP->fr_fix + 1, 4, fragP->fr_symbol,
fragP->fr_offset, 1, BFD_RELOC_16_PCREL);
fragP->fr_var = 0;
fragP->fr_fix += 3;
}
else if (fragP->fr_subtype == 10)
{
int offset = fragP->fr_fix;
fragP->fr_literal[offset] = 0xf4;
fragP->fr_literal[offset + 1] = 0xe0;
fix_new (fragP, fragP->fr_fix + 2, 4, fragP->fr_symbol,
fragP->fr_offset, 1, BFD_RELOC_24_PCREL);
fragP->fr_var = 0;
fragP->fr_fix += 5;
}
else
abort ();
}
valueT
md_section_align (seg, addr)
asection *seg;
valueT addr;
{
int align = bfd_get_section_alignment (stdoutput, seg);
return ((addr + (1 << align) - 1) & (-1 << align));
}
void
md_begin ()
{
char *prev_name = "";
register const struct mn10200_opcode *op;
mn10200_hash = hash_new();
/* Insert unique names into hash table. The MN10200 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 = mn10200_opcodes;
while (op->name)
{
if (strcmp (prev_name, op->name))
{
prev_name = (char *) op->name;
hash_insert (mn10200_hash, op->name, (char *) op);
}
op++;
}
/* This is both a simplification (we don't have to write md_apply_fix)
and support for future optimizations (branch shortening and similar
stuff in the linker. */
linkrelax = 1;
}
void
md_assemble (str)
char *str;
{
char *s;
struct mn10200_opcode *opcode;
struct mn10200_opcode *next_opcode;
const unsigned char *opindex_ptr;
int next_opindex, relaxable;
unsigned long insn, extension, size = 0;
char *f;
int i;
int match;
/* Get the opcode. */
for (s = str; *s != '\0' && ! isspace (*s); s++)
;
if (*s != '\0')
*s++ = '\0';
/* find the first opcode with the proper name */
opcode = (struct mn10200_opcode *)hash_find (mn10200_hash, str);
if (opcode == NULL)
{
as_bad ("Unrecognized opcode: `%s'", str);
return;
}
str = s;
while (isspace (*str))
++str;
input_line_pointer = str;
for(;;)
{
const char *errmsg = NULL;
int op_idx;
char *hold;
int extra_shift = 0;
relaxable = 0;
fc = 0;
match = 0;
next_opindex = 0;
insn = opcode->opcode;
extension = 0;
for (op_idx = 1, opindex_ptr = opcode->operands;
*opindex_ptr != 0;
opindex_ptr++, op_idx++)
{
const struct mn10200_operand *operand;
expressionS ex;
if (next_opindex == 0)
{
operand = &mn10200_operands[*opindex_ptr];
}
else
{
operand = &mn10200_operands[next_opindex];
next_opindex = 0;
}
errmsg = NULL;
while (*str == ' ' || *str == ',')
++str;
if (operand->flags & MN10200_OPERAND_RELAX)
relaxable = 1;
/* Gather the operand. */
hold = input_line_pointer;
input_line_pointer = str;
if (operand->flags & MN10200_OPERAND_PAREN)
{
if (*input_line_pointer != ')' && *input_line_pointer != '(')
{
input_line_pointer = hold;
str = hold;
goto error;
}
input_line_pointer++;
goto keep_going;
}
/* See if we can match the operands. */
else if (operand->flags & MN10200_OPERAND_DREG)
{
if (!data_register_name (&ex))
{
input_line_pointer = hold;
str = hold;
goto error;
}
}
else if (operand->flags & MN10200_OPERAND_AREG)
{
if (!address_register_name (&ex))
{
input_line_pointer = hold;
str = hold;
goto error;
}
}
else if (operand->flags & MN10200_OPERAND_PSW)
{
char *start = input_line_pointer;
char c = get_symbol_end ();
if (strcmp (start, "psw") != 0)
{
*input_line_pointer = c;
input_line_pointer = hold;
str = hold;
goto error;
}
*input_line_pointer = c;
goto keep_going;
}
else if (operand->flags & MN10200_OPERAND_MDR)
{
char *start = input_line_pointer;
char c = get_symbol_end ();
if (strcmp (start, "mdr") != 0)
{
*input_line_pointer = c;
input_line_pointer = hold;
str = hold;
goto error;
}
*input_line_pointer = c;
goto keep_going;
}
else if (data_register_name (&ex))
{
input_line_pointer = hold;
str = hold;
goto error;
}
else if (address_register_name (&ex))
{
input_line_pointer = hold;
str = hold;
goto error;
}
else if (other_register_name (&ex))
{
input_line_pointer = hold;
str = hold;
goto error;
}
else if (*str == ')' || *str == '(')
{
input_line_pointer = hold;
str = hold;
goto error;
}
else
{
expression (&ex);
}
switch (ex.X_op)
{
case O_illegal:
errmsg = "illegal operand";
goto error;
case O_absent:
errmsg = "missing operand";
goto error;
case O_register:
if ((operand->flags
& (MN10200_OPERAND_DREG | MN10200_OPERAND_AREG)) == 0)
{
input_line_pointer = hold;
str = hold;
goto error;
}
if (opcode->format == FMT_2 || opcode->format == FMT_5)
extra_shift = 8;
else if (opcode->format == FMT_3 || opcode->format == FMT_6
|| opcode->format == FMT_7)
extra_shift = 16;
else
extra_shift = 0;
mn10200_insert_operand (&insn, &extension, operand,
ex.X_add_number, (char *) NULL,
0, extra_shift);
break;
case O_constant:
/* If this operand can be promoted, and it doesn't
fit into the allocated bitfield for this insn,
then promote it (ie this opcode does not match). */
if (operand->flags
& (MN10200_OPERAND_PROMOTE | MN10200_OPERAND_RELAX)
&& ! check_operand (insn, operand, ex.X_add_number))
{
input_line_pointer = hold;
str = hold;
goto error;
}
mn10200_insert_operand (&insn, &extension, operand,
ex.X_add_number, (char *) NULL,
0, 0);
break;
default:
/* If this operand can be promoted, then this opcode didn't
match since we can't know if it needed promotion! */
if (operand->flags & MN10200_OPERAND_PROMOTE)
{
input_line_pointer = hold;
str = hold;
goto error;
}
/* We need to generate a fixup for this expression. */
if (fc >= MAX_INSN_FIXUPS)
as_fatal ("too many fixups");
fixups[fc].exp = ex;
fixups[fc].opindex = *opindex_ptr;
fixups[fc].reloc = BFD_RELOC_UNUSED;
++fc;
break;
}
keep_going:
str = input_line_pointer;
input_line_pointer = hold;
while (*str == ' ' || *str == ',')
++str;
}
/* Make sure we used all the operands! */
if (*str != ',')
match = 1;
error:
if (match == 0)
{
next_opcode = opcode + 1;
if (!strcmp(next_opcode->name, opcode->name))
{
opcode = next_opcode;
continue;
}
as_bad ("%s", errmsg);
return;
}
break;
}
while (isspace (*str))
++str;
if (*str != '\0')
as_bad ("junk at end of line: `%s'", str);
input_line_pointer = str;
if (opcode->format == FMT_1)
size = 1;
else if (opcode->format == FMT_2 || opcode->format == FMT_4)
size = 2;
else if (opcode->format == FMT_3 || opcode->format == FMT_5)
size = 3;
else if (opcode->format == FMT_6)
size = 4;
else if (opcode->format == FMT_7)
size = 5;
else
abort ();
/* Write out the instruction. */
if (relaxable && fc > 0)
{
int type;
/* bCC */
if (size == 2 && opcode->opcode != 0xfc0000)
type = 0;
/* jsr */
else if (size == 3 && opcode->opcode == 0xfd0000)
type = 6;
/* jmp */
else if (size == 3 && opcode->opcode == 0xfc0000)
type = 8;
/* bCCx */
else
type = 3;
f = frag_var (rs_machine_dependent, 8, 8 - size, type,
fixups[0].exp.X_add_symbol,
fixups[0].exp.X_add_number,
(char *)fixups[0].opindex);
number_to_chars_bigendian (f, insn, size);
if (8 - size > 4)
{
number_to_chars_bigendian (f + size, 0, 4);
number_to_chars_bigendian (f + size + 4, 0, 8 - size - 4);
}
else
number_to_chars_bigendian (f + size, 0, 8 - size);
}
else
{
f = frag_more (size);
/* Oh, what a mess. The instruction is in big endian format, but
16 and 24bit immediates are little endian! */
if (opcode->format == FMT_3)
{
number_to_chars_bigendian (f, (insn >> 16) & 0xff, 1);
number_to_chars_littleendian (f + 1, insn & 0xffff, 2);
}
else if (opcode->format == FMT_6)
{
number_to_chars_bigendian (f, (insn >> 16) & 0xffff, 2);
number_to_chars_littleendian (f + 2, insn & 0xffff, 2);
}
else if (opcode->format == FMT_7)
{
number_to_chars_bigendian (f, (insn >> 16) & 0xffff, 2);
number_to_chars_littleendian (f + 2, insn & 0xffff, 2);
number_to_chars_littleendian (f + 4, extension & 0xff, 1);
}
else
{
number_to_chars_bigendian (f, insn, size > 4 ? 4 : size);
}
/* Create any fixups. */
for (i = 0; i < fc; i++)
{
const struct mn10200_operand *operand;
operand = &mn10200_operands[fixups[i].opindex];
if (fixups[i].reloc != BFD_RELOC_UNUSED)
{
reloc_howto_type *reloc_howto;
int size;
int offset;
fixS *fixP;
reloc_howto = bfd_reloc_type_lookup (stdoutput, fixups[i].reloc);
if (!reloc_howto)
abort();
size = bfd_get_reloc_size (reloc_howto);
if (size < 1 || size > 4)
abort();
offset = 4 - size;
fixP = fix_new_exp (frag_now, f - frag_now->fr_literal + offset,
size,
&fixups[i].exp,
reloc_howto->pc_relative,
fixups[i].reloc);
/* PC-relative offsets are from the first byte of the next
instruction, not from the start of the current instruction. */
if (reloc_howto->pc_relative)
fixP->fx_offset += size;
}
else
{
int reloc, pcrel, reloc_size, offset;
fixS *fixP;
reloc = BFD_RELOC_NONE;
/* How big is the reloc? Remember SPLIT relocs are
implicitly 32bits. */
reloc_size = operand->bits;
offset = size - reloc_size / 8;
/* Is the reloc pc-relative? */
pcrel = (operand->flags & MN10200_OPERAND_PCREL) != 0;
/* Choose a proper BFD relocation type. */
if (pcrel)
{
if (reloc_size == 8)
reloc = BFD_RELOC_8_PCREL;
else if (reloc_size == 24)
reloc = BFD_RELOC_24_PCREL;
else
abort ();
}
else
{
if (reloc_size == 32)
reloc = BFD_RELOC_32;
else if (reloc_size == 16)
reloc = BFD_RELOC_16;
else if (reloc_size == 8)
reloc = BFD_RELOC_8;
else if (reloc_size == 24)
reloc = BFD_RELOC_24;
else
abort ();
}
/* Convert the size of the reloc into what fix_new_exp wants. */
reloc_size = reloc_size / 8;
if (reloc_size == 8)
reloc_size = 0;
else if (reloc_size == 16)
reloc_size = 1;
else if (reloc_size == 32 || reloc_size == 24)
reloc_size = 2;
fixP = fix_new_exp (frag_now, f - frag_now->fr_literal + offset,
reloc_size, &fixups[i].exp, pcrel,
((bfd_reloc_code_real_type) reloc));
/* PC-relative offsets are from the first byte of the next
instruction, not from the start of the current instruction. */
if (pcrel)
fixP->fx_offset += size;
}
}
}
}
/* if while processing a fixup, a reloc really needs to be created */
/* then it is done here */
arelent *
tc_gen_reloc (seg, fixp)
asection *seg;
fixS *fixp;
{
arelent *reloc;
reloc = (arelent *) xmalloc (sizeof (arelent));
reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
if (reloc->howto == (reloc_howto_type *) NULL)
{
as_bad_where (fixp->fx_file, fixp->fx_line,
"reloc %d not supported by object file format",
(int)fixp->fx_r_type);
return NULL;
}
reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
if (fixp->fx_addsy && fixp->fx_subsy)
{
reloc->sym_ptr_ptr = &bfd_abs_symbol;
reloc->addend = (S_GET_VALUE (fixp->fx_addsy)
- S_GET_VALUE (fixp->fx_subsy) + fixp->fx_offset);
}
else
{
reloc->sym_ptr_ptr = &fixp->fx_addsy->bsym;
reloc->addend = fixp->fx_offset;
}
return reloc;
}
int
md_estimate_size_before_relax (fragp, seg)
fragS *fragp;
asection *seg;
{
if (fragp->fr_subtype == 0)
return 2;
if (fragp->fr_subtype == 3)
return 3;
if (fragp->fr_subtype == 6)
{
if (!S_IS_DEFINED (fragp->fr_symbol)
|| seg != S_GET_SEGMENT (fragp->fr_symbol))
{
fragp->fr_subtype = 7;
return 5;
}
return 3;
}
if (fragp->fr_subtype == 8)
{
if (!S_IS_DEFINED (fragp->fr_symbol))
{
fragp->fr_subtype = 10;
return 5;
}
return 2;
}
}
long
md_pcrel_from (fixp)
fixS *fixp;
{
return fixp->fx_frag->fr_address;
#if 0
if (fixp->fx_addsy != (symbolS *) NULL && ! S_IS_DEFINED (fixp->fx_addsy))
{
/* The symbol is undefined. Let the linker figure it out. */
return 0;
}
return fixp->fx_frag->fr_address + fixp->fx_where;
#endif
}
int
md_apply_fix3 (fixp, valuep, seg)
fixS *fixp;
valueT *valuep;
segT seg;
{
/* We shouldn't ever get here because linkrelax is nonzero. */
abort ();
fixp->fx_done = 1;
return 0;
}
/* Insert an operand value into an instruction. */
static void
mn10200_insert_operand (insnp, extensionp, operand, val, file, line, shift)
unsigned long *insnp;
unsigned long *extensionp;
const struct mn10200_operand *operand;
offsetT val;
char *file;
unsigned int line;
unsigned int shift;
{
/* No need to check 24 or 32bit operands for a bit. */
if (operand->bits < 24
&& (operand->flags & MN10200_OPERAND_NOCHECK) == 0)
{
long min, max;
offsetT test;
if ((operand->flags & MN10200_OPERAND_SIGNED) != 0)
{
max = (1 << (operand->bits - 1)) - 1;
min = - (1 << (operand->bits - 1));
}
else
{
max = (1 << operand->bits) - 1;
min = 0;
}
test = val;
if (test < (offsetT) min || test > (offsetT) max)
{
const char *err =
"operand out of range (%s not between %ld and %ld)";
char buf[100];
sprint_value (buf, test);
if (file == (char *) NULL)
as_warn (err, buf, min, max);
else
as_warn_where (file, line, err, buf, min, max);
}
}
if ((operand->flags & MN10200_OPERAND_EXTENDED) == 0)
{
*insnp |= (((long) val & ((1 << operand->bits) - 1))
<< (operand->shift + shift));
if ((operand->flags & MN10200_OPERAND_REPEATED) != 0)
*insnp |= (((long) val & ((1 << operand->bits) - 1))
<< (operand->shift + shift + 2));
}
else
{
*extensionp |= (val >> 16) & 0xff;
*insnp |= val & 0xffff;
}
}
static unsigned long
check_operand (insn, operand, val)
unsigned long insn;
const struct mn10200_operand *operand;
offsetT val;
{
/* No need to check 24bit or 32bit operands for a bit. */
if (operand->bits < 24
&& (operand->flags & MN10200_OPERAND_NOCHECK) == 0)
{
long min, max;
offsetT test;
if ((operand->flags & MN10200_OPERAND_SIGNED) != 0)
{
max = (1 << (operand->bits - 1)) - 1;
min = - (1 << (operand->bits - 1));
}
else
{
max = (1 << operand->bits) - 1;
min = 0;
}
test = val;
if (test < (offsetT) min || test > (offsetT) max)
return 0;
else
return 1;
}
return 1;
}