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binutils-gdb/gas/config/tc-h8500.c
Steve Chamberlain 033400ec8d * config/{h8500.mt, tc-h8500.c, tc-h8500.h, obj-coffbfd.c, 
obj-coffbfd.h}: support for the H8/500
1993-02-04 20:47:48 +00:00

1551 lines
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/* tc-h8500.c -- Assemble code for the Hitachi H8/500
Copyright (C) 1993 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
/*
Written By Steve Chamberlain
sac@cygnus.com
*/
#include <stdio.h>
#include "as.h"
#include "bfd.h"
#define DEFINE_TABLE
#include "../opcodes/h8500-opc.h"
#include <ctype.h>
const char comment_chars[] =
{';', 0};
const char line_separator_chars[] =
{'$', 0};
const char line_comment_chars[] = "";
/* 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
*/
void cons ();
const pseudo_typeS md_pseudo_table[] =
{
{"int", cons, 2},
{"data.b", cons, 1},
{"data.w", cons, 2},
{"data.l", cons, 4},
{"form", listing_psize, 0},
{"heading", listing_title, 0},
{"import", s_ignore, 0},
{"page", listing_eject, 0},
{"program", s_ignore, 0},
{0, 0, 0}
};
int md_reloc_size;
const char EXP_CHARS[] = "eE";
/* Chars that mean this number is a floating point constant */
/* As in 0f12.456 */
/* or 0d1.2345e12 */
const char FLT_CHARS[] = "rRsSfFdDxXpP";
#define C(a,b) ENCODE_RELAX(a,b)
#define ENCODE_RELAX(what,length) (((what) << 2) + (length))
#define GET_WHAT(x) ((x>>2))
#define BYTE_DISP 1
#define WORD_DISP 2
#define UNDEF_BYTE_DISP 0
#define UNDEF_WORD_DISP 3
#define BRANCH 1
#define SCB_F 2
#define SCB_TST 3
#define END 4
#define BYTE_F 127
#define BYTE_B -128
#define WORD_F 32767
#define WORD_B 32768
relax_typeS md_relax_table[C (END, 0)];
static struct hash_control *opcode_hash_control; /* Opcode mnemonics */
/*
This function is called once, at assembler startup time. This should
set up all the tables, etc that the MD part of the assembler needs
*/
void
md_begin ()
{
h8500_opcode_info *opcode;
char prev_buffer[100];
int idx = 0;
opcode_hash_control = hash_new ();
prev_buffer[0] = 0;
/* Insert unique names into hash table */
for (opcode = h8500_table; opcode->name; opcode++)
{
if (idx != opcode->idx)
{
hash_insert (opcode_hash_control, opcode->name, (char *) opcode);
idx++;
}
}
/* Initialize the relax table */
md_relax_table[C (BRANCH, BYTE_DISP)].rlx_forward = BYTE_F;
md_relax_table[C (BRANCH, BYTE_DISP)].rlx_backward = BYTE_B;
md_relax_table[C (BRANCH, BYTE_DISP)].rlx_length = 2;
md_relax_table[C (BRANCH, BYTE_DISP)].rlx_more = C (BRANCH, WORD_DISP);
md_relax_table[C (BRANCH, WORD_DISP)].rlx_forward = WORD_F;
md_relax_table[C (BRANCH, WORD_DISP)].rlx_backward = WORD_B;
md_relax_table[C (BRANCH, WORD_DISP)].rlx_length = 3;
md_relax_table[C (BRANCH, WORD_DISP)].rlx_more = 0;
md_relax_table[C (SCB_F, BYTE_DISP)].rlx_forward = BYTE_F;
md_relax_table[C (SCB_F, BYTE_DISP)].rlx_backward = BYTE_B;
md_relax_table[C (SCB_F, BYTE_DISP)].rlx_length = 3;
md_relax_table[C (SCB_F, BYTE_DISP)].rlx_more = C (SCB_F, WORD_DISP);
md_relax_table[C (SCB_F, WORD_DISP)].rlx_forward = WORD_F;
md_relax_table[C (SCB_F, WORD_DISP)].rlx_backward = WORD_B;
md_relax_table[C (SCB_F, WORD_DISP)].rlx_length = 8;
md_relax_table[C (SCB_F, WORD_DISP)].rlx_more = 0;
md_relax_table[C (SCB_TST, BYTE_DISP)].rlx_forward = BYTE_F;
md_relax_table[C (SCB_TST, BYTE_DISP)].rlx_backward = BYTE_B;
md_relax_table[C (SCB_TST, BYTE_DISP)].rlx_length = 3;
md_relax_table[C (SCB_TST, BYTE_DISP)].rlx_more = C (SCB_TST, WORD_DISP);
md_relax_table[C (SCB_TST, WORD_DISP)].rlx_forward = WORD_F;
md_relax_table[C (SCB_TST, WORD_DISP)].rlx_backward = WORD_B;
md_relax_table[C (SCB_TST, WORD_DISP)].rlx_length = 10;
md_relax_table[C (SCB_TST, WORD_DISP)].rlx_more = 0;
}
int rn; /* register number used by RN */
int rs; /* register number used by RS */
int rd; /* register number used by RD */
int crb; /* byte size cr */
int crw; /* word sized cr */
expressionS displacement; /* displacement expression */
int displacement_size; /* and size if given */
int immediate_inpage;
expressionS immediate; /* immediate expression */
int immediate_size; /* and size if given */
expressionS absolute; /* absolute expression */
int absolute_size; /* and size if given */
typedef struct
{
int type;
int reg;
expressionS exp;
int page;
}
h8500_operand_info;
/* try and parse a reg name, returns number of chars consumed */
int
parse_reg (src, mode, reg)
char *src;
int *mode;
unsigned int *reg;
{
if (src[0] == 'r')
{
if (src[1] >= '0' && src[1] <= '7')
{
*mode = RN;
*reg = (src[1] - '0');
return 2;
}
}
if (src[0] == 's' && src[1] == 'p')
{
*mode = RN;
*reg = 7;
return 2;
}
if (src[0] == 'c' && src[1] == 'c' && src[2] == 'r')
{
*mode = CRB;
*reg = 1;
return 3;
}
if (src[0] == 's' && src[1] == 'r')
{
*mode = CRW;
*reg = 0;
return 2;
}
if (src[0] == 'b' && src[1] == 'r')
{
*mode = CRB;
*reg = 3;
return 2;
}
if (src[0] == 'e' && src[1] == 'p')
{
*mode = CRB;
*reg = 4;
return 2;
}
if (src[0] == 'd' && src[1] == 'p')
{
*mode = CRB;
*reg = 5;
return 2;
}
if (src[0] == 't' && src[1] == 'p')
{
*mode = CRW;
*reg = 7;
return 2;
}
if (src[0] == 'f' && src[1] == 'p')
{
*mode = RN;
*reg = 6;
return 2;
}
return 0;
}
char *
parse_exp (s, op, page)
char *s;
expressionS *op;
int *page;
{
char *save;
char *new;
segT seg;
save = input_line_pointer;
*page = 0;
if (s[0] == '%')
{
if (s[1] == 'p' && s[2] == 'a' && s[3] == 'g' && s[4] == 'e') {
s+=5;
*page = 1;
}
else if (s[1] == 'o' && s[2] == 'f' && s[3] == 'f') {
s+=4;
}
}
input_line_pointer = s;
seg = expr (0, op);
new = input_line_pointer;
input_line_pointer = save;
if (SEG_NORMAL (seg))
return new;
switch (seg)
{
case SEG_ABSOLUTE:
case SEG_UNKNOWN:
case SEG_DIFFERENCE:
case SEG_BIG:
case SEG_REGISTER:
return new;
case SEG_ABSENT:
as_bad ("Missing operand");
return new;
default:
as_bad ("Don't understand operand of type %s", segment_name (seg));
return new;
}
}
static char *
skip_colonthing (ptr, exp, def, size8, size16, size24)
char *ptr;
h8500_operand_info *exp;
int def;
int size8;
int size16;
int size24;
{
ptr = parse_exp (ptr, &exp->exp, &exp->page);
if (*ptr == ':')
{
ptr++;
if (*ptr == '8')
{
ptr++;
exp->type = size8;
}
else if (ptr[0] == '1' & ptr[1] == '6')
{
ptr += 2;
exp->type = size16;
}
else if (ptr[0] == '2' & ptr[1] == '4')
{
if (!size24)
{
as_bad (":24 not valid for this opcode");
}
ptr += 2;
exp->type = size24;
}
else
{
as_bad ("expect :8,:16 or :24");
exp->type = size16;
}
}
else
{
if(exp->page) {
exp->type = IMM8;
}
else {
/* Let's work out the size from the context */
if (size8
&& exp->exp.X_seg == SEG_ABSOLUTE
&& exp->exp.X_add_number >= -128
&& exp->exp.X_add_number <= 127)
{
exp->type = size8;
}
else
{
exp->type = def;
}
}
}
return ptr;
}
static int
parse_reglist(src, op)
char *src;
h8500_operand_info *op;
{
int mode;
int rn;
int mask = 0;
int rm;
int idx = 1; /* skip ( */
while (src[idx] && src[idx] != ')')
{
int done = parse_reg(src+idx, &mode, &rn);
if (done)
{
idx += done;
mask |= 1<<rn;
}
else
{
as_bad("syntax error in reg list");
return 0;
}
if (src[idx]== '-')
{
idx++;
done = parse_reg(src+idx, &mode, &rm);
if (done) {
idx += done;
while (rn <= rm) {
mask |= 1<<rn;
rn++;
}
}
else {
as_bad("missing final register in range");
}
}
if (src[idx] == ',')
idx++;
}
idx++;
op->exp.X_add_symbol = 0;
op->exp.X_subtract_symbol = 0;
op->exp.X_add_number = mask;
op->exp.X_seg = SEG_ABSOLUTE;
op->type= IMM8;
return idx;
}
/* The many forms of operand:
Rn Register direct
@Rn Register indirect
@(disp[:size], Rn) Register indirect with displacement
@Rn+
@-Rn
@aa[:size] absolute
#xx[:size] immediate data
*/
static void
get_operand (ptr, op)
char **ptr;
h8500_operand_info *op;
{
char *src = *ptr;
int mode;
unsigned int num;
unsigned int len;
unsigned int size;
if (src[0] == '(' && src[1] == 'r')
{
/* This is a register list */
*ptr = src + parse_reglist(src, op);
return;
}
len = parse_reg (src, &op->type, &op->reg);
if (len)
{
*ptr = src + len;
return;
}
if (*src == '@')
{
src++;
if (*src == '-')
{
src++;
len = parse_reg (src, &mode, &num);
if (len == 0)
{
/* Oops, not a reg after all, must be ordinary exp */
src--;
/* must be a symbol */
*ptr = skip_colonthing (src, op, ABS16, ABS8, ABS16, ABS24);
return;
}
op->type = RNDEC;
op->reg = num;
*ptr = src + len;
return;
}
if (*src == '(')
{
/* Disp */
src++;
src = skip_colonthing (src, op, RNIND_D16, RNIND_D8, RNIND_D16, 0);
if (*src != ',')
{
as_bad ("expected @(exp, Rn)");
return;
}
src++;
len = parse_reg (src, &mode, &op->reg);
if (len == 0 || mode != RN)
{
as_bad ("expected @(exp, Rn)");
return;
}
src += len;
if (*src != ')')
{
as_bad ("expected @(exp, Rn)");
return;
}
*ptr = src + 1;
return;
}
len = parse_reg (src, &mode, &num);
if (len)
{
src += len;
if (*src == '+')
{
src++;
if (mode != RN)
{
as_bad ("@Rn+ needs word register");
return;
}
op->type = RNINC;
op->reg = num;
*ptr = src;
return;
}
if (mode != RN)
{
as_bad ("@Rn needs word register");
return;
}
op->type = RNIND;
op->reg = num;
*ptr = src;
return;
}
else
{
/* must be a symbol */
*ptr = skip_colonthing (src, op, ABS16, ABS8, ABS16, 0);
return;
}
}
if (*src == '#')
{
src++;
*ptr = skip_colonthing (src, op, IMM16, IMM8, IMM16, 0);
return;
}
else
{
*ptr = skip_colonthing (src, op, PCREL8, PCREL8, PCREL16, 0);
}
}
static
char *
get_operands (info, args, operand)
h8500_opcode_info *info;
char *args;
h8500_operand_info *operand;
{
char *ptr = args;
switch (info->nargs)
{
case 0:
operand[0].type = 0;
operand[1].type = 0;
break;
case 1:
ptr++;
get_operand (&ptr, operand + 0, 0);
operand[1].type = 0;
break;
case 2:
ptr++;
get_operand (&ptr, operand + 0, 0);
if (*ptr == ',')
ptr++;
get_operand (&ptr, operand + 1, 1);
break;
default:
abort ();
}
return ptr;
}
/* Passed a pointer to a list of opcodes which use different
addressing modes, return the opcode which matches the opcodes
provided
*/
int pcrel8;
static
h8500_opcode_info *
get_specific (opcode, operands)
h8500_opcode_info *opcode;
h8500_operand_info *operands;
{
h8500_opcode_info *this_try = opcode;
int found = 0;
unsigned int noperands = opcode->nargs;
unsigned int dispreg;
unsigned int this_index = opcode->idx;
while (this_index == opcode->idx && !found)
{
unsigned int i;
this_try = opcode++;
/* look at both operands needed by the opcodes and provided by
the user*/
for (i = 0; i < noperands; i++)
{
h8500_operand_info *user = operands + i;
switch (this_try->arg_type[i])
{
case FPIND_D16:
/* Opcode needs (disp:16,fp) */
if (user->type == DISP16 && user->reg == 6)
{
displacement = user->exp;
continue;
}
break;
case FPIND_D8:
/* Opcode needs (disp:8,fp) */
if (user->type == DISP8 && user->reg == 6)
{
displacement = user->exp;
continue;
}
break;
case RDIND_D16:
if (user->type == RNIND_D16)
{
displacement = user->exp;
rd = user->reg;
continue;
}
break;
case RDIND_D8:
if (user->type == RNIND_D8)
{
displacement = user->exp;
rd = user->reg;
continue;
}
break;
case RNIND_D16:
case RNIND_D8:
if (user->type == this_try->arg_type[i])
{
displacement = user->exp;
rn = user->reg;
continue;
}
break;
case SPDEC:
if (user->type == RNDEC && user->reg == 7)
{
continue;
}
break;
case ABS16:
if (user->type == ABS16)
{
absolute = user->exp;
continue;
}
break;
case ABS8:
if (user->type == ABS8)
{
absolute = user->exp;
continue;
}
break;
case ABS24:
if (user->type == ABS24)
{
absolute = user->exp;
continue;
}
break;
case CRB:
if (user->type == CRB)
{
crb = user->reg;
continue;
}
break;
case CRW:
if (user->type == CRW)
{
crw = user->reg;
continue;
}
break;
case DISP16:
if (user->type == DISP16)
{
displacement = user->exp;
continue;
}
break;
case DISP8:
if (user->type == DISP8)
{
displacement = user->exp;
continue;
}
break;
case FP:
if (user->type == RN && user->reg == 6)
{
continue;
}
break;
case PCREL16:
if (user->type == PCREL16)
{
displacement = user->exp;
continue;
}
break;
case PCREL8:
if (user->type == PCREL8)
{
displacement = user->exp;
pcrel8 = 1;
continue;
}
break;
case IMM16:
if (user->type == IMM16
|| user->type == IMM8)
{
immediate_inpage = user->page;
immediate = user->exp;
continue;
}
break;
case RLIST:
case IMM8:
if (user->type == IMM8)
{
immediate_inpage = user->page;
immediate = user->exp;
continue;
}
break;
case IMM4:
if (user->type == IMM8)
{
immediate_inpage = user->page;
immediate = user->exp;
continue;
}
break;
case QIM:
if (user->type == IMM8
&& user->exp.X_seg == SEG_ABSOLUTE
&&
(user->exp.X_add_number == -2
|| user->exp.X_add_number == -1
|| user->exp.X_add_number == 1
|| user->exp.X_add_number == 2))
{
immediate_inpage = user->page;
immediate = user->exp;
continue;
}
break;
case RD:
if (user->type == RN)
{
rd = user->reg;
continue;
}
break;
case RS:
if (user->type == RN)
{
rs = user->reg;
continue;
}
break;
case RDIND:
if (user->type == RNIND)
{
rd = user->reg;
continue;
}
break;
case RNINC:
case RNIND:
case RNDEC:
case RN:
if (user->type == this_try->arg_type[i])
{
rn = user->reg;
continue;
}
break;
case SP:
if (user->type == RN && user->reg == 7)
{
continue;
}
break;
default:
printf ("unhandled %d\n", this_try->arg_type[i]);
break;
}
/* If we get here this didn't work out */
goto fail;
}
found = 1;
fail:;
}
if (found)
return this_try;
else
return 0;
}
int
check (operand, low, high)
expressionS *operand;
int low;
int high;
{
if (operand->X_seg != SEG_ABSOLUTE
|| operand->X_add_number < low
|| operand->X_add_number > high)
{
as_bad ("operand must be absolute in range %d..%d", low, high);
}
return operand->X_add_number;
}
#if 0
static void
DEFUN (check_operand, (operand, width, string),
struct h8_op *operand AND
unsigned int width AND
char *string)
{
if (operand->exp.X_add_symbol == 0
&& operand->exp.X_subtract_symbol == 0)
{
/* No symbol involved, let's look at offset, it's dangerous if any of
the high bits are not 0 or ff's, find out by oring or anding with
the width and seeing if the answer is 0 or all fs*/
if ((operand->exp.X_add_number & ~width) != 0 &&
(operand->exp.X_add_number | width) != (~0))
{
as_warn ("operand %s0x%x out of range.", string, operand->exp.X_add_number);
}
}
}
#endif
insert (size, output, index, exp, reloc, opcode)
char *output;
int index;
expressionS *exp;
char *opcode;
{
md_number_to_chars (output + index, exp->X_add_number, size);
exp->X_add_number = 0;
if (exp->X_add_symbol || exp->X_subtract_symbol)
{
fix_new (frag_now,
output - frag_now->fr_literal + index,
size,
exp->X_add_symbol,
exp->X_subtract_symbol,
(short) (exp->X_add_number),
0,
reloc);
}
}
void
build_relaxable_instruction (opcode, operand)
h8500_opcode_info *opcode;
h8500_operand_info *operand;
{
/* All relaxable instructions start life as two bytes but can become
three bytes long if a lonely branch and up to 9 bytes if long scb
*/
char *p;
int len;
int type;
if (opcode->bytes[0].contents == 0x01)
{
type = SCB_F;
}
else if (opcode->bytes[0].contents == 0x06
|| opcode->bytes[0].contents == 0x07)
{
type = SCB_TST;
}
else
{
type = BRANCH;
}
p = frag_var (rs_machine_dependent,
md_relax_table[C (type, WORD_DISP)].rlx_length,
len = md_relax_table[C (type, BYTE_DISP)].rlx_length,
C (type, UNDEF_BYTE_DISP),
displacement.X_add_symbol,
displacement.X_add_number,
0);
p[0] = opcode->bytes[0].contents;
if (type != BRANCH)
{
p[1] = opcode->bytes[1].contents | rs;
}
}
/* Now we know what sort of opcodes it is, lets build the bytes -
*/
static void
build_bytes (opcode, operand)
h8500_opcode_info *opcode;
h8500_operand_info *operand;
{
unsigned int i;
char part;
int index;
char high;
int nib;
int byte;
if (pcrel8)
{
pcrel8 = 0;
build_relaxable_instruction (opcode, operand);
}
else
{
char *output = frag_more (opcode->length);
memset (output, 0, opcode->length);
for (index = 0; index < opcode->length; index++)
{
output[index] = opcode->bytes[index].contents;
switch (opcode->bytes[index].insert)
{
default:
printf ("failed for %d\n", opcode->bytes[index].insert);
break;
case 0:
break;
case RN:
output[index] |= rn;
break;
case RD:
output[index] |= rd;
break;
case RS:
output[index] |= rs;
break;
case DISP16:
case FPIND_D16:
insert (2, output, index, &displacement, R_H8500_IMM16);
index++;
break;
case DISP8:
case FPIND_D8:
insert (1, output, index, &displacement, R_H8500_IMM8);
break;
case IMM16:
insert (2, output, index, &immediate, R_H8500_IMM16);
index++;
break;
case RLIST:
case IMM8:
insert (1, output, index, &immediate, immediate_inpage ?
R_H8500_HIGH8 : R_H8500_IMM8);
break;
case PCREL16:
insert (2, output, index, &displacement, R_H8500_PCREL16);
index++;
break;
case PCREL8:
insert (1, output, index, &displacement, R_H8500_PCREL8, output);
break;
case IMM4:
output[index] |= check (&immediate, 0, 15);
break;
case CRB:
output[index] |= crb;
break;
case CRW:
output[index] |= crw;
break;
case ABS16:
insert (2, output, index, absolute, R_H8500_IMM16);
index++;
break;
case ABS8:
insert (1, output, index, absolute, R_H8500_IMM8);
break;
case QIM:
switch (immediate.X_add_number)
{
case -2:
output[index] |= 0x5;
break;
case -1:
output[index] |= 0x4;
break;
case 1:
output[index] |= 0;
break;
case 2:
output[index] |= 1;
break;
}
break;
}
}
}
}
/* This is the guts of the machine-dependent assembler. STR points to a
machine dependent instruction. This funciton is supposed to emit
the frags/bytes it assembles to.
*/
void
DEFUN (md_assemble, (str),
char *str)
{
char *op_start;
char *op_end;
unsigned int i;
h8500_operand_info operand[2];
h8500_opcode_info *opcode;
h8500_opcode_info *prev_opcode;
char name[11];
char *dot = 0;
char c;
int nlen = 0;
/* Drop leading whitespace */
while (*str == ' ')
str++;
/* find the op code end */
for (op_start = op_end = str;
*op_end != 0 && *op_end != ' ';
op_end++)
{
if (*op_end != '.'
&& *op_end != ':'
&& nlen < 10)
{
name[nlen++] = *op_end;
}
}
name[nlen] = 0;
if (op_end == op_start)
{
as_bad ("can't find opcode ");
}
opcode = (h8500_opcode_info *) hash_find (opcode_hash_control, name);
if (opcode == NULL)
{
as_bad ("unknown opcode");
return;
}
input_line_pointer = get_operands (opcode, op_end, operand);
prev_opcode = opcode;
opcode = get_specific (opcode, operand);
if (opcode == 0)
{
/* Couldn't find an opcode which matched the operands */
char *where = frag_more (2);
where[0] = 0x0;
where[1] = 0x0;
as_bad ("invalid operands for opcode");
return;
}
build_bytes (opcode, operand);
}
void
DEFUN (tc_crawl_symbol_chain, (headers),
object_headers * headers)
{
printf ("call to tc_crawl_symbol_chain \n");
}
symbolS *
DEFUN (md_undefined_symbol, (name),
char *name)
{
return 0;
}
void
DEFUN (tc_headers_hook, (headers),
object_headers * headers)
{
printf ("call to tc_headers_hook \n");
}
void
DEFUN_VOID (md_end)
{
}
/* Various routines to kill one day */
/* Equal to MAX_PRECISION in atof-ieee.c */
#define MAX_LITTLENUMS 6
/* 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.
*/
char *
md_atof (type, litP, sizeP)
char 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;
case 'x':
case 'X':
prec = 6;
break;
case 'p':
case 'P':
prec = 6;
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, (long) (*wordP++), sizeof (LITTLENUM_TYPE));
litP += sizeof (LITTLENUM_TYPE);
}
return ""; /* Someone should teach Dean about null pointers */
}
int
md_parse_option (argP, cntP, vecP)
char **argP;
int *cntP;
char ***vecP;
{
return 0;
}
int md_short_jump_size;
void
tc_aout_fix_to_chars ()
{
printf ("call to tc_aout_fix_to_chars \n");
abort ();
}
void
md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol)
char *ptr;
long from_addr;
long to_addr;
fragS *frag;
symbolS *to_symbol;
{
as_fatal ("failed sanity check.");
}
void
md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol)
char *ptr;
long from_addr, to_addr;
fragS *frag;
symbolS *to_symbol;
{
as_fatal ("failed sanity check.");
}
static
void
wordify_scb (buffer, disp_size, inst_size)
char *buffer;
int *disp_size;
int *inst_size;
{
int rn = buffer[1] & 0x7;
switch (buffer[0])
{
case 0x0e: /* BSR */
case 0x20:
case 0x21:
case 0x22:
case 0x23:
case 0x25:
case 0x26:
case 0x27:
case 0x28:
case 0x29:
case 0x2a:
case 0x2b:
case 0x2c:
case 0x2d:
case 0x2e:
case 0x2f:
buffer[0] |= 0x10;
buffer[1] = 0;
buffer[2] = 0;
*disp_size = 2;
*inst_size = 1;
return;
default:
abort ();
case 0x01:
*inst_size = 6;
*disp_size = 2;
break;
case 0x06:
*inst_size = 8;
*disp_size = 2;
*buffer++ = 0x26; /* bne + 8 */
*buffer++ = 0x08;
break;
case 0x07:
*inst_size = 8;
*disp_size = 2;
*buffer++ = 0x27; /* bne + 8 */
*buffer++ = 0x08;
break;
}
*buffer++ = 0xa8 | rn; /* addq -1,rn */
*buffer++ = 0x0c;
*buffer++ = 0x04; /* cmp #0xff:8, rn */
*buffer++ = 0xff;
*buffer++ = 0x70 | rn;
*buffer++ = 0x36; /* bne ... */
*buffer++ = 0;
*buffer++ = 0;
}
/*
called after relaxing, change the frags so they know how big they are
*/
void
md_convert_frag (headers, fragP)
object_headers *headers;
fragS *fragP;
{
fixS *fixP;
int disp_size = 0;
int inst_size = 0;
char *buffer = fragP->fr_fix + fragP->fr_literal;
switch (fragP->fr_subtype)
{
case C (BRANCH, BYTE_DISP):
disp_size = 1;
inst_size = 1;
break;
case C (SCB_F, BYTE_DISP):
case C (SCB_TST, BYTE_DISP):
disp_size = 1;
inst_size = 2;
break;
/* Branches to a known 16 bit displacement */
/* Turn on the 16bit bit */
case C (BRANCH, WORD_DISP):
case C (SCB_F, WORD_DISP):
case C (SCB_TST, WORD_DISP):
wordify_scb (buffer, &disp_size, &inst_size);
break;
case C (BRANCH, UNDEF_WORD_DISP):
case C (SCB_F, UNDEF_WORD_DISP):
case C (SCB_TST, UNDEF_WORD_DISP):
/* This tried to be relaxed, but didn't manage it, it now needs a
fix */
wordify_scb (buffer, &disp_size, &inst_size);
/* Make a reloc */
fixP = fix_new (fragP,
fragP->fr_fix + inst_size,
2,
fragP->fr_symbol,
0,
fragP->fr_offset,
0,
R_H8500_PCREL16);
fragP->fr_fix += disp_size + inst_size;
fragP->fr_var = 0;
return;
break;
default:
abort ();
}
if (inst_size)
{
/* Get the address of the end of the instruction */
int next_inst = fragP->fr_fix + fragP->fr_address + disp_size + inst_size;
int targ_addr = (S_GET_VALUE (fragP->fr_symbol) +
fragP->fr_offset);
int disp = targ_addr - next_inst;
md_number_to_chars (buffer + inst_size, disp, disp_size);
fragP->fr_fix += disp_size + inst_size;
fragP->fr_var = 0;
}
}
long
DEFUN (md_section_align, (seg, size),
segT seg AND
long size)
{
return ((size + (1 << section_alignment[(int) seg]) - 1) & (-1 << section_alignment[(int) seg]));
}
void
md_apply_fix (fixP, val)
fixS *fixP;
long val;
{
char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
switch (fixP->fx_size)
{
case 1:
*buf++ = val;
break;
case 2:
*buf++ = (val >> 8);
*buf++ = val;
break;
case 4:
*buf++ = (val >> 24);
*buf++ = (val >> 16);
*buf++ = (val >> 8);
*buf++ = val;
break;
default:
abort ();
}
}
void
DEFUN (md_operand, (expressionP), expressionS * expressionP)
{
}
int md_long_jump_size;
/*
called just before address relaxation, return the length
by which a fragment must grow to reach it's destination
*/
int
md_estimate_size_before_relax (fragP, segment_type)
register fragS *fragP;
register segT segment_type;
{
int growth = 0;
char *buffer = fragP->fr_fix + fragP->fr_literal;
int what = GET_WHAT (fragP->fr_subtype);
switch (fragP->fr_subtype)
{
default:
abort();
case C (BRANCH, UNDEF_BYTE_DISP):
case C (SCB_F, UNDEF_BYTE_DISP):
case C (SCB_TST, UNDEF_BYTE_DISP):
/* used to be a branch to somewhere which was unknown */
if (S_GET_SEGMENT (fragP->fr_symbol) == segment_type)
{
/* Got a symbol and it's defined in this segment, become byte
sized - maybe it will fix up */
fragP->fr_subtype = C (what, BYTE_DISP);
}
else
{
/* Its got a segment, but its not ours, so it will always be long */
fragP->fr_subtype = C (what, UNDEF_WORD_DISP);
fragP->fr_var = md_relax_table[C(what, WORD_DISP)].rlx_length;
return md_relax_table[C(what, WORD_DISP)].rlx_length;
}
}
return fragP->fr_var + fragP->fr_fix;
}
/* Put number into target byte order */
void
md_number_to_chars (ptr, use, nbytes)
char *ptr;
long use;
int nbytes;
{
switch (nbytes)
{
case 4:
*ptr++ = (use >> 24) & 0xff;
case 3:
*ptr++ = (use >> 16) & 0xff;
case 2:
*ptr++ = (use >> 8) & 0xff;
case 1:
*ptr++ = (use >> 0) & 0xff;
break;
default:
abort ();
}
}
long
md_pcrel_from (fixP)
fixS *fixP;
{
return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address;
}
void
tc_coff_symbol_emit_hook ()
{
}
void
tc_reloc_mangle (fix_ptr, intr, base)
fixS *fix_ptr;
struct internal_reloc *intr;
bfd_vma base;
{
symbolS *symbol_ptr;
symbol_ptr = fix_ptr->fx_addsy;
/* If this relocation is attached to a symbol then it's ok
to output it */
if (fix_ptr->fx_r_type == RELOC_32)
{
/* cons likes to create reloc32's whatever the size of the reloc..
*/
switch (fix_ptr->fx_size)
{
case 2:
intr->r_type = R_IMM16;
break;
case 1:
intr->r_type = R_IMM8;
break;
default:
abort ();
}
}
else
{
intr->r_type = fix_ptr->fx_r_type;
}
intr->r_vaddr = fix_ptr->fx_frag->fr_address + fix_ptr->fx_where + base;
intr->r_offset = fix_ptr->fx_offset;
if (symbol_ptr)
intr->r_symndx = symbol_ptr->sy_number;
else
intr->r_symndx = -1;
}
/* end of tc-h8500.c */
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