671 lines
17 KiB
C
671 lines
17 KiB
C
/* tc-xstormy16.c -- Assembler for the Sanyo XSTORMY16.
|
||
Copyright 2000, 2001, 2002, 2003, 2004, 2005 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 "as.h"
|
||
#include "subsegs.h"
|
||
#include "symcat.h"
|
||
#include "opcodes/xstormy16-desc.h"
|
||
#include "opcodes/xstormy16-opc.h"
|
||
#include "cgen.h"
|
||
|
||
/* Structure to hold all of the different components describing
|
||
an individual instruction. */
|
||
typedef struct
|
||
{
|
||
const CGEN_INSN * insn;
|
||
const CGEN_INSN * orig_insn;
|
||
CGEN_FIELDS fields;
|
||
#if CGEN_INT_INSN_P
|
||
CGEN_INSN_INT buffer [1];
|
||
#define INSN_VALUE(buf) (*(buf))
|
||
#else
|
||
unsigned char buffer [CGEN_MAX_INSN_SIZE];
|
||
#define INSN_VALUE(buf) (buf)
|
||
#endif
|
||
char * addr;
|
||
fragS * frag;
|
||
int num_fixups;
|
||
fixS * fixups [GAS_CGEN_MAX_FIXUPS];
|
||
int indices [MAX_OPERAND_INSTANCES];
|
||
}
|
||
xstormy16_insn;
|
||
|
||
const char comment_chars[] = ";";
|
||
const char line_comment_chars[] = "#";
|
||
const char line_separator_chars[] = "|";
|
||
const char EXP_CHARS[] = "eE";
|
||
const char FLT_CHARS[] = "dD";
|
||
|
||
#define O_fptr_symbol (O_max + 1)
|
||
|
||
#define XSTORMY16_SHORTOPTS ""
|
||
const char * md_shortopts = XSTORMY16_SHORTOPTS;
|
||
|
||
struct option md_longopts[] =
|
||
{
|
||
{NULL, no_argument, NULL, 0}
|
||
};
|
||
size_t md_longopts_size = sizeof (md_longopts);
|
||
|
||
int
|
||
md_parse_option (c, arg)
|
||
int c ATTRIBUTE_UNUSED;
|
||
char * arg ATTRIBUTE_UNUSED;
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
md_show_usage (stream)
|
||
FILE * stream;
|
||
{
|
||
fprintf (stream, _(" XSTORMY16 specific command line options:\n"));
|
||
}
|
||
|
||
/* The target specific pseudo-ops which we support. */
|
||
const pseudo_typeS md_pseudo_table[] =
|
||
{
|
||
{ "word", cons, 4 },
|
||
{ NULL, NULL, 0 }
|
||
};
|
||
|
||
|
||
void
|
||
md_begin ()
|
||
{
|
||
/* Initialize the `cgen' interface. */
|
||
|
||
/* Set the machine number and endian. */
|
||
gas_cgen_cpu_desc = xstormy16_cgen_cpu_open (CGEN_CPU_OPEN_MACHS, 0,
|
||
CGEN_CPU_OPEN_ENDIAN,
|
||
CGEN_ENDIAN_LITTLE,
|
||
CGEN_CPU_OPEN_END);
|
||
xstormy16_cgen_init_asm (gas_cgen_cpu_desc);
|
||
|
||
/* This is a callback from cgen to gas to parse operands. */
|
||
cgen_set_parse_operand_fn (gas_cgen_cpu_desc, gas_cgen_parse_operand);
|
||
}
|
||
|
||
static bfd_boolean skipping_fptr = FALSE;
|
||
|
||
void
|
||
md_assemble (str)
|
||
char * str;
|
||
{
|
||
xstormy16_insn insn;
|
||
char * errmsg;
|
||
|
||
/* Make sure that if we had an erroneous input line which triggered
|
||
the skipping_fptr boolean that it does not affect following lines. */
|
||
skipping_fptr = FALSE;
|
||
|
||
/* Initialize GAS's cgen interface for a new instruction. */
|
||
gas_cgen_init_parse ();
|
||
|
||
insn.insn = xstormy16_cgen_assemble_insn
|
||
(gas_cgen_cpu_desc, str, & insn.fields, insn.buffer, & errmsg);
|
||
|
||
if (!insn.insn)
|
||
{
|
||
as_bad (errmsg);
|
||
return;
|
||
}
|
||
|
||
/* Doesn't really matter what we pass for RELAX_P here. */
|
||
gas_cgen_finish_insn (insn.insn, insn.buffer,
|
||
CGEN_FIELDS_BITSIZE (& insn.fields), 0, NULL);
|
||
}
|
||
|
||
void
|
||
md_operand (e)
|
||
expressionS * e;
|
||
{
|
||
if (*input_line_pointer != '@')
|
||
return;
|
||
|
||
if (strncmp (input_line_pointer + 1, "fptr", 4) == 0)
|
||
{
|
||
input_line_pointer += 5;
|
||
SKIP_WHITESPACE ();
|
||
if (*input_line_pointer != '(')
|
||
{
|
||
as_bad ("Expected '('");
|
||
goto err;
|
||
}
|
||
input_line_pointer++;
|
||
|
||
expression (e);
|
||
|
||
if (*input_line_pointer != ')')
|
||
{
|
||
as_bad ("Missing ')'");
|
||
goto err;
|
||
}
|
||
input_line_pointer++;
|
||
SKIP_WHITESPACE ();
|
||
|
||
if (e->X_op != O_symbol)
|
||
as_bad ("Not a symbolic expression");
|
||
else if (* input_line_pointer == '-')
|
||
/* We are computing the difference of two function pointers
|
||
like this:
|
||
|
||
.hword @fptr (foo) - @fptr (bar)
|
||
|
||
In this situation we do not want to generate O_fptr_symbol
|
||
operands because the result is an absolute value, not a
|
||
function pointer.
|
||
|
||
We need to make the check here, rather than when the fixup
|
||
is generated as the function names (foo & bar in the above
|
||
example) might be local symbols and we want the expression
|
||
to be evaluated now. This kind of thing can happen when
|
||
gcc is generating computed gotos. */
|
||
skipping_fptr = TRUE;
|
||
else if (skipping_fptr)
|
||
skipping_fptr = FALSE;
|
||
else
|
||
e->X_op = O_fptr_symbol;
|
||
}
|
||
|
||
return;
|
||
err:
|
||
ignore_rest_of_line ();
|
||
}
|
||
|
||
/* Called while parsing data to create a fixup.
|
||
Create BFD_RELOC_XSTORMY16_FPTR16 relocations. */
|
||
|
||
void
|
||
xstormy16_cons_fix_new (f, where, nbytes, exp)
|
||
fragS *f;
|
||
int where;
|
||
int nbytes;
|
||
expressionS *exp;
|
||
{
|
||
bfd_reloc_code_real_type code;
|
||
fixS *fix;
|
||
|
||
if (exp->X_op == O_fptr_symbol)
|
||
{
|
||
switch (nbytes)
|
||
{
|
||
case 4:
|
||
/* This can happen when gcc is generating debug output.
|
||
For example it can create a stab with the address of
|
||
a function:
|
||
|
||
.stabs "foo:F(0,21)",36,0,0,@fptr(foo)
|
||
|
||
Since this does not involve switching code pages, we
|
||
just allow the reloc to be generated without any
|
||
@fptr behaviour. */
|
||
exp->X_op = O_symbol;
|
||
code = BFD_RELOC_32;
|
||
break;
|
||
case 2:
|
||
exp->X_op = O_symbol;
|
||
code = BFD_RELOC_XSTORMY16_FPTR16;
|
||
break;
|
||
default:
|
||
as_bad ("unsupported fptr fixup size %d", nbytes);
|
||
return;
|
||
}
|
||
}
|
||
else if (nbytes == 1)
|
||
code = BFD_RELOC_8;
|
||
else if (nbytes == 2)
|
||
code = BFD_RELOC_16;
|
||
else if (nbytes == 4)
|
||
code = BFD_RELOC_32;
|
||
else
|
||
{
|
||
as_bad ("unsupported fixup size %d", nbytes);
|
||
return;
|
||
}
|
||
|
||
fix = fix_new_exp (f, where, nbytes, exp, 0, code);
|
||
}
|
||
|
||
/* Called while parsing an instruction to create a fixup.
|
||
Create BFD_RELOC_XSTORMY16_FPTR16 relocations. */
|
||
|
||
fixS *
|
||
xstormy16_cgen_record_fixup_exp (frag, where, insn, length, operand, opinfo, exp)
|
||
fragS * frag;
|
||
int where;
|
||
const CGEN_INSN * insn;
|
||
int length;
|
||
const CGEN_OPERAND * operand;
|
||
int opinfo;
|
||
expressionS * exp;
|
||
{
|
||
fixS *fixP;
|
||
operatorT op = exp->X_op;
|
||
|
||
if (op == O_fptr_symbol)
|
||
exp->X_op = O_symbol;
|
||
|
||
fixP = gas_cgen_record_fixup_exp (frag, where, insn, length,
|
||
operand, opinfo, exp);
|
||
|
||
if (op == O_fptr_symbol)
|
||
{
|
||
if (operand->type != XSTORMY16_OPERAND_IMM16)
|
||
as_bad ("unsupported fptr fixup");
|
||
else
|
||
{
|
||
fixP->fx_r_type = BFD_RELOC_XSTORMY16_FPTR16;
|
||
fixP->fx_where += 2;
|
||
}
|
||
}
|
||
|
||
return fixP;
|
||
}
|
||
|
||
valueT
|
||
md_section_align (segment, size)
|
||
segT segment;
|
||
valueT size;
|
||
{
|
||
int align = bfd_get_section_alignment (stdoutput, segment);
|
||
return ((size + (1 << align) - 1) & (-1 << align));
|
||
}
|
||
|
||
symbolS *
|
||
md_undefined_symbol (name)
|
||
char * name ATTRIBUTE_UNUSED;
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
/* Return an initial guess of the length by which a fragment must grow to
|
||
hold a branch to reach its destination.
|
||
Also updates fr_type/fr_subtype as necessary.
|
||
|
||
Called just before doing relaxation.
|
||
Any symbol that is now undefined will not become defined.
|
||
The guess for fr_var is ACTUALLY the growth beyond fr_fix.
|
||
Whatever we do to grow fr_fix or fr_var contributes to our returned value.
|
||
Although it may not be explicit in the frag, pretend fr_var starts with a
|
||
0 value. */
|
||
|
||
int
|
||
md_estimate_size_before_relax (fragP, segment)
|
||
fragS * fragP ATTRIBUTE_UNUSED;
|
||
segT segment ATTRIBUTE_UNUSED;
|
||
{
|
||
/* No assembler relaxation is defined (or necessary) for this port. */
|
||
abort ();
|
||
}
|
||
|
||
/* *fragP has been relaxed to its final size, and now needs to have
|
||
the bytes inside it modified to conform to the new size.
|
||
|
||
Called after relaxation is finished.
|
||
fragP->fr_type == rs_machine_dependent.
|
||
fragP->fr_subtype is the subtype of what the address relaxed to. */
|
||
|
||
void
|
||
md_convert_frag (abfd, sec, fragP)
|
||
bfd * abfd ATTRIBUTE_UNUSED;
|
||
segT sec ATTRIBUTE_UNUSED;
|
||
fragS * fragP ATTRIBUTE_UNUSED;
|
||
{
|
||
/* No assembler relaxation is defined (or necessary) for this port. */
|
||
abort ();
|
||
}
|
||
|
||
/* Functions concerning relocs. */
|
||
|
||
/* The location from which a PC relative jump should be calculated,
|
||
given a PC relative reloc. */
|
||
|
||
long
|
||
md_pcrel_from_section (fixP, sec)
|
||
fixS * fixP;
|
||
segT sec;
|
||
{
|
||
if ((fixP->fx_addsy != (symbolS *) NULL
|
||
&& (! S_IS_DEFINED (fixP->fx_addsy)
|
||
|| S_GET_SEGMENT (fixP->fx_addsy) != sec))
|
||
|| xstormy16_force_relocation (fixP))
|
||
/* The symbol is undefined,
|
||
or it is defined but not in this section,
|
||
or the relocation will be relative to this symbol not the section symbol.
|
||
Let the linker figure it out. */
|
||
return 0;
|
||
|
||
return fixP->fx_frag->fr_address + fixP->fx_where;
|
||
}
|
||
|
||
/* Return the bfd reloc type for OPERAND of INSN at fixup FIXP.
|
||
Returns BFD_RELOC_NONE if no reloc type can be found.
|
||
*FIXP may be modified if desired. */
|
||
|
||
bfd_reloc_code_real_type
|
||
md_cgen_lookup_reloc (insn, operand, fixP)
|
||
const CGEN_INSN * insn ATTRIBUTE_UNUSED;
|
||
const CGEN_OPERAND * operand;
|
||
fixS * fixP;
|
||
{
|
||
switch (operand->type)
|
||
{
|
||
case XSTORMY16_OPERAND_IMM2:
|
||
case XSTORMY16_OPERAND_IMM3:
|
||
case XSTORMY16_OPERAND_IMM3B:
|
||
case XSTORMY16_OPERAND_IMM4:
|
||
case XSTORMY16_OPERAND_HMEM8:
|
||
return BFD_RELOC_NONE;
|
||
|
||
case XSTORMY16_OPERAND_IMM12:
|
||
fixP->fx_where += 2;
|
||
return BFD_RELOC_XSTORMY16_12;
|
||
|
||
case XSTORMY16_OPERAND_IMM8:
|
||
case XSTORMY16_OPERAND_LMEM8:
|
||
return fixP->fx_pcrel ? BFD_RELOC_8_PCREL : BFD_RELOC_8;
|
||
|
||
case XSTORMY16_OPERAND_IMM16:
|
||
/* This might have been processed at parse time. */
|
||
fixP->fx_where += 2;
|
||
if (fixP->fx_cgen.opinfo && fixP->fx_cgen.opinfo != BFD_RELOC_NONE)
|
||
return fixP->fx_cgen.opinfo;
|
||
return fixP->fx_pcrel ? BFD_RELOC_16_PCREL : BFD_RELOC_16;
|
||
|
||
case XSTORMY16_OPERAND_ABS24:
|
||
return BFD_RELOC_XSTORMY16_24;
|
||
|
||
case XSTORMY16_OPERAND_REL8_4:
|
||
fixP->fx_addnumber -= 2;
|
||
case XSTORMY16_OPERAND_REL8_2:
|
||
fixP->fx_addnumber -= 2;
|
||
fixP->fx_pcrel = 1;
|
||
return BFD_RELOC_8_PCREL;
|
||
|
||
case XSTORMY16_OPERAND_REL12:
|
||
fixP->fx_where += 2;
|
||
/* Fall through... */
|
||
case XSTORMY16_OPERAND_REL12A:
|
||
fixP->fx_addnumber -= 2;
|
||
fixP->fx_pcrel = 1;
|
||
return BFD_RELOC_XSTORMY16_REL_12;
|
||
|
||
default : /* avoid -Wall warning */
|
||
abort ();
|
||
}
|
||
}
|
||
|
||
/* See whether we need to force a relocation into the output file.
|
||
This is used to force out switch and PC relative relocations when
|
||
relaxing. */
|
||
|
||
int
|
||
xstormy16_force_relocation (fix)
|
||
fixS * fix;
|
||
{
|
||
if (fix->fx_r_type == BFD_RELOC_XSTORMY16_FPTR16)
|
||
return 1;
|
||
|
||
return generic_force_reloc (fix);
|
||
}
|
||
|
||
/* Return true if a relocation against a symbol may be replaced with
|
||
a relocation against section+offset. */
|
||
|
||
bfd_boolean
|
||
xstormy16_fix_adjustable (fixP)
|
||
fixS * fixP;
|
||
{
|
||
/* We need the symbol name for the VTABLE entries. */
|
||
if (fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT
|
||
|| fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
|
||
return 0;
|
||
|
||
if (fixP->fx_r_type == BFD_RELOC_XSTORMY16_FPTR16)
|
||
return 0;
|
||
|
||
return 1;
|
||
}
|
||
|
||
/* This is a copy of gas_cgen_md_apply_fix3, with some enhancements to
|
||
do various things that would not be valid for all ports. */
|
||
|
||
void
|
||
xstormy16_md_apply_fix3 (fixP, valueP, seg)
|
||
fixS * fixP;
|
||
valueT * valueP;
|
||
segT seg ATTRIBUTE_UNUSED;
|
||
{
|
||
char *where = fixP->fx_frag->fr_literal + fixP->fx_where;
|
||
valueT value = *valueP;
|
||
/* Canonical name, since used a lot. */
|
||
CGEN_CPU_DESC cd = gas_cgen_cpu_desc;
|
||
|
||
/* md_cgen_lookup_reloc() will adjust this to compensate for where
|
||
in the opcode the relocation happens, for pcrel relocations. We
|
||
have no other way of keeping track of what this offset needs to
|
||
be. */
|
||
fixP->fx_addnumber = 0;
|
||
|
||
/* This port has pc-relative relocs and DIFF_EXPR_OK defined, so
|
||
it must deal with turning a BFD_RELOC_{8,16,32,64} into a
|
||
BFD_RELOC_*_PCREL for the case of
|
||
|
||
.word something-.
|
||
*/
|
||
if (fixP->fx_pcrel)
|
||
switch (fixP->fx_r_type)
|
||
{
|
||
case BFD_RELOC_8:
|
||
fixP->fx_r_type = BFD_RELOC_8_PCREL;
|
||
break;
|
||
case BFD_RELOC_16:
|
||
fixP->fx_r_type = BFD_RELOC_16_PCREL;
|
||
break;
|
||
case BFD_RELOC_32:
|
||
fixP->fx_r_type = BFD_RELOC_32_PCREL;
|
||
break;
|
||
case BFD_RELOC_64:
|
||
fixP->fx_r_type = BFD_RELOC_64_PCREL;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
if (fixP->fx_addsy == (symbolS *) NULL)
|
||
fixP->fx_done = 1;
|
||
|
||
/* We don't actually support subtracting a symbol. */
|
||
if (fixP->fx_subsy != (symbolS *) NULL)
|
||
as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex"));
|
||
|
||
if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED)
|
||
{
|
||
int opindex = (int) fixP->fx_r_type - (int) BFD_RELOC_UNUSED;
|
||
const CGEN_OPERAND *operand = cgen_operand_lookup_by_num (cd, opindex);
|
||
const char *errmsg;
|
||
bfd_reloc_code_real_type reloc_type;
|
||
CGEN_FIELDS *fields = alloca (CGEN_CPU_SIZEOF_FIELDS (cd));
|
||
const CGEN_INSN *insn = fixP->fx_cgen.insn;
|
||
|
||
/* If the reloc has been fully resolved finish the operand here. */
|
||
/* FIXME: This duplicates the capabilities of code in BFD. */
|
||
if (fixP->fx_done)
|
||
{
|
||
CGEN_CPU_SET_FIELDS_BITSIZE (cd) (fields, CGEN_INSN_BITSIZE (insn));
|
||
CGEN_CPU_SET_VMA_OPERAND (cd) (cd, opindex, fields, (bfd_vma) value);
|
||
|
||
#if CGEN_INT_INSN_P
|
||
{
|
||
CGEN_INSN_INT insn_value =
|
||
cgen_get_insn_value (cd, where, CGEN_INSN_BITSIZE (insn));
|
||
|
||
/* ??? 0 is passed for `pc'. */
|
||
errmsg = CGEN_CPU_INSERT_OPERAND (cd) (cd, opindex, fields,
|
||
&insn_value, (bfd_vma) 0);
|
||
cgen_put_insn_value (cd, where, CGEN_INSN_BITSIZE (insn),
|
||
insn_value);
|
||
}
|
||
#else
|
||
/* ??? 0 is passed for `pc'. */
|
||
errmsg = CGEN_CPU_INSERT_OPERAND (cd) (cd, opindex, fields, where,
|
||
(bfd_vma) 0);
|
||
#endif
|
||
if (errmsg)
|
||
as_bad_where (fixP->fx_file, fixP->fx_line, "%s", errmsg);
|
||
}
|
||
|
||
if (fixP->fx_done)
|
||
return;
|
||
|
||
/* The operand isn't fully resolved. Determine a BFD reloc value
|
||
based on the operand information and leave it to
|
||
bfd_install_relocation. Note that this doesn't work when
|
||
!partial_inplace. */
|
||
|
||
reloc_type = md_cgen_lookup_reloc (insn, operand, fixP);
|
||
if (reloc_type != BFD_RELOC_NONE)
|
||
{
|
||
fixP->fx_r_type = reloc_type;
|
||
}
|
||
else
|
||
{
|
||
as_bad_where (fixP->fx_file, fixP->fx_line,
|
||
_("unresolved expression that must be resolved"));
|
||
fixP->fx_done = 1;
|
||
return;
|
||
}
|
||
}
|
||
else if (fixP->fx_done)
|
||
{
|
||
/* We're finished with this fixup. Install it because
|
||
bfd_install_relocation won't be called to do it. */
|
||
switch (fixP->fx_r_type)
|
||
{
|
||
case BFD_RELOC_8:
|
||
md_number_to_chars (where, value, 1);
|
||
break;
|
||
case BFD_RELOC_16:
|
||
md_number_to_chars (where, value, 2);
|
||
break;
|
||
case BFD_RELOC_32:
|
||
md_number_to_chars (where, value, 4);
|
||
break;
|
||
case BFD_RELOC_64:
|
||
md_number_to_chars (where, value, 8);
|
||
break;
|
||
default:
|
||
as_bad_where (fixP->fx_file, fixP->fx_line,
|
||
_("internal error: can't install fix for reloc type %d (`%s')"),
|
||
fixP->fx_r_type, bfd_get_reloc_code_name (fixP->fx_r_type));
|
||
break;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* bfd_install_relocation will be called to finish things up. */
|
||
}
|
||
|
||
/* This is a RELA port. Thus, it does not need to store a
|
||
value if it is going to make a reloc. What's more, when
|
||
assembling a line like
|
||
|
||
.byte global-0x7f00
|
||
|
||
we'll get a spurious error message if we try to stuff 0x7f00 into
|
||
the byte. */
|
||
if (! fixP->fx_done)
|
||
*valueP = 0;
|
||
|
||
/* Tuck `value' away for use by tc_gen_reloc.
|
||
See the comment describing fx_addnumber in write.h.
|
||
This field is misnamed (or misused :-). */
|
||
fixP->fx_addnumber += value;
|
||
}
|
||
|
||
|
||
/* Write a value out to the object file, using the appropriate endianness. */
|
||
|
||
void
|
||
md_number_to_chars (buf, val, n)
|
||
char * buf;
|
||
valueT val;
|
||
int n;
|
||
{
|
||
number_to_chars_littleendian (buf, val, n);
|
||
}
|
||
|
||
/* 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.
|
||
*/
|
||
|
||
/* Equal to MAX_PRECISION in atof-ieee.c */
|
||
#define MAX_LITTLENUMS 6
|
||
|
||
char *
|
||
md_atof (type, litP, sizeP)
|
||
char type;
|
||
char * litP;
|
||
int * sizeP;
|
||
{
|
||
int prec;
|
||
LITTLENUM_TYPE words [MAX_LITTLENUMS];
|
||
LITTLENUM_TYPE *wordP;
|
||
char * t;
|
||
|
||
switch (type)
|
||
{
|
||
case 'f':
|
||
case 'F':
|
||
prec = 2;
|
||
break;
|
||
|
||
case 'd':
|
||
case 'D':
|
||
prec = 4;
|
||
break;
|
||
|
||
/* FIXME: Some targets allow other format chars for bigger sizes here. */
|
||
|
||
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);
|
||
|
||
*sizeP = prec * sizeof (LITTLENUM_TYPE);
|
||
/* This loops outputs the LITTLENUMs in REVERSE order; in accord with
|
||
the littleendianness of the processor. */
|
||
for (wordP = words + prec - 1; prec--;)
|
||
{
|
||
md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE));
|
||
litP += sizeof (LITTLENUM_TYPE);
|
||
}
|
||
|
||
return 0;
|
||
}
|