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Handle xxx@word + N. Treat it as xxx >> 2 + N.

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This commit is contained in:
Andrew Cagney 1998-02-11 02:46:51 +00:00
parent a5f4fbff1d
commit 14926763d6
1 changed files with 56 additions and 18 deletions
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74
gas/config/tc-d10v.c
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@ -35,7 +35,12 @@ const char FLT_CHARS[] = "dD";
int Optimizing = 0;
#define AT_WORD (-1)
#define AT_WORD_P(X) ((X)->X_op == O_right_shift \
&& (X)->X_op_symbol != NULL \
&& (X)->X_op_symbol->sy_value.X_op == O_constant \
&& (X)->X_op_symbol->sy_value.X_add_number == AT_WORD_RIGHT_SHIFT)
#define AT_WORD_RIGHT_SHIFT 2
/* fixups */
#define MAX_INSN_FIXUPS (5)
@ -79,6 +84,8 @@ static int parallel_ok PARAMS ((struct d10v_opcode *opcode1, unsigned long insn1
int exec_type));
struct option md_longopts[] = {
#define OPTION_NOWARNSWAP (OPTION_MD_BASE)
{"nowarnswap", no_argument, NULL, OPTION_NOWARNSWAP},
{NULL, no_argument, NULL, 0}
};
size_t md_longopts_size = sizeof(md_longopts);
@ -218,6 +225,9 @@ md_parse_option (c, arg)
/* Optimize. Will attempt to parallelize operations */
Optimizing = 1;
break;
case OPTION_NOWARNSWAP:
flag_warn_suppress_instructionswap = 1;
break;
default:
return 0;
}
@ -425,18 +435,39 @@ get_operands (exp)
expression (&exp[numops]);
}
if (!strncasecmp (input_line_pointer, "@word", 5))
if (strncasecmp (input_line_pointer, "@word", 5) == 0)
{
input_line_pointer += 5;
if (exp[numops].X_op == O_register)
{
/* if it looked like a register name but was followed by "@word" */
/* then it was really a symbol, so change it to one */
/* if it looked like a register name but was followed by
"@word" then it was really a symbol, so change it to
one */
exp[numops].X_op = O_symbol;
exp[numops].X_add_symbol = symbol_find_or_make ((char *)exp[numops].X_op_symbol);
}
exp[numops].X_op_symbol = (struct symbol *)-1;
exp[numops].X_add_number = AT_WORD;
input_line_pointer += 5;
/* check for identifier@word+constant */
if (*input_line_pointer == '-' || *input_line_pointer == '+')
{
char *orig_line = input_line_pointer;
expressionS new_exp;
expression (&new_exp);
exp[numops].X_add_number = new_exp.X_add_number;
}
/* convert expr into a right shift by AT_WORD_RIGHT_SHIFT */
{
expressionS new_exp;
memset (&new_exp, 0, sizeof new_exp);
new_exp.X_add_number = AT_WORD_RIGHT_SHIFT;
new_exp.X_op = O_constant;
new_exp.X_unsigned = 1;
exp[numops].X_op_symbol = make_expr_symbol (&new_exp);
exp[numops].X_op = O_right_shift;
}
know (AT_WORD_P (&exp[numops]));
}
if (exp[numops].X_op == O_illegal)
@ -533,14 +564,22 @@ build_insn (opcode, opers, insn)
if (fixups->fc >= MAX_INSN_FIXUPS)
as_fatal ("too many fixups");
if (opers[i].X_op == O_symbol && number == AT_WORD &&
opers[i].X_op_symbol == (struct symbol *)-1 )
if (AT_WORD_P (&opers[i]))
{
number = opers[i].X_add_number = 0;
/* Reconize XXX>>1+N aka XXX@word+N as special (AT_WORD) */
fixups->fix[fixups->fc].reloc = BFD_RELOC_D10V_18;
} else
fixups->fix[fixups->fc].reloc =
get_reloc((struct d10v_operand *)&d10v_operands[opcode->operands[i]]);
opers[i].X_op = O_symbol;
opers[i].X_op_symbol = NULL; /* Should free it */
/* number is left shifted by AT_WORD_RIGHT_SHIFT so
that, it is aligned with the symbol's value. Later,
BFD_RELOC_D10V_18 will right shift (symbol_value +
X_add_number). */
number <<= AT_WORD_RIGHT_SHIFT;
opers[i].X_add_number = number;
}
else
fixups->fix[fixups->fc].reloc =
get_reloc((struct d10v_operand *)&d10v_operands[opcode->operands[i]]);
if (fixups->fix[fixups->fc].reloc == BFD_RELOC_16 ||
fixups->fix[fixups->fc].reloc == BFD_RELOC_D10V_18)
@ -718,7 +757,7 @@ write_2_short (opcode1, insn1, opcode2, insn2, exec_type, fx)
{
if (opcode2->unit == IU)
as_fatal ("Two IU instructions may not be executed in parallel");
if (flag_warn_instructionswap)
if (!flag_warn_suppress_instructionswap)
as_warn ("Swapping instruction order");
insn = FM00 | (insn2 << 15) | insn1;
}
@ -726,7 +765,7 @@ write_2_short (opcode1, insn1, opcode2, insn2, exec_type, fx)
{
if (opcode1->unit == MU)
as_fatal ("Two MU instructions may not be executed in parallel");
if (flag_warn_instructionswap)
if (!flag_warn_suppress_instructionswap)
as_warn ("Swapping instruction order");
insn = FM00 | (insn2 << 15) | insn1;
}
@ -1149,8 +1188,7 @@ find_opcode (opcode, myops)
else
value = S_GET_VALUE(myops[opnum].X_add_symbol);
if (myops[opnum].X_add_number == AT_WORD &&
myops[opnum].X_op_symbol == (struct symbol *)-1)
if (AT_WORD_P (&myops[opnum]))
{
if (bits > 4)
{
@ -1368,7 +1406,7 @@ md_apply_fix3 (fixp, valuep, seg)
case BFD_RELOC_D10V_18_PCREL:
case BFD_RELOC_D10V_18:
/* instruction addresses are always right-shifted by 2 */
value >>= 2;
value >>= AT_WORD_RIGHT_SHIFT;
if (fixp->fx_size == 2)
bfd_putb16 ((bfd_vma) value, (unsigned char *) where);
else