[thirdparty/binutils-gdb.git] / gas / config / tc-openrisc.c

/* tc-openrisc.c -- Assembler for the OpenRISC family.
   Copyright 2001, 2002, 2003, 2005 Free Software Foundation.
   Contributed by Johan Rydberg, jrydberg@opencores.org

   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/openrisc-desc.h"
#include "opcodes/openrisc-opc.h"
#include "cgen.h"

/* Structure to hold all of the different components describing
   an individual instruction.  */
typedef struct openrisc_insn openrisc_insn;

struct openrisc_insn
{
  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];
};


const char comment_chars[]        = "#";
const char line_comment_chars[]   = "#";
const char line_separator_chars[] = ";";
const char EXP_CHARS[]            = "eE";
const char FLT_CHARS[]            = "dD";

\f
#define OPENRISC_SHORTOPTS "m:"
const char * md_shortopts = OPENRISC_SHORTOPTS;

struct option md_longopts[] =
{
  {NULL, no_argument, NULL, 0}
};
size_t md_longopts_size = sizeof (md_longopts);

unsigned long openrisc_machine = 0; /* default */

int
md_parse_option (int c ATTRIBUTE_UNUSED, char * arg ATTRIBUTE_UNUSED)
{
  return 0;
}

void
md_show_usage (FILE * stream ATTRIBUTE_UNUSED)
{
}

static void
ignore_pseudo (int val ATTRIBUTE_UNUSED)
{
  discard_rest_of_line ();
}

const char openrisc_comment_chars [] = ";#";

/* The target specific pseudo-ops which we support.  */
const pseudo_typeS md_pseudo_table[] =
{
  { "word",     cons,           4 },
  { "proc",     ignore_pseudo,  0 },
  { "endproc",  ignore_pseudo,  0 },
  { NULL, 	NULL, 		0 }
};


\f
void
md_begin (void)
{
  /* Initialize the `cgen' interface.  */

  /* Set the machine number and endian.  */
  gas_cgen_cpu_desc = openrisc_cgen_cpu_open (CGEN_CPU_OPEN_MACHS, 0,
                                              CGEN_CPU_OPEN_ENDIAN,
                                              CGEN_ENDIAN_BIG,
                                              CGEN_CPU_OPEN_END);
  openrisc_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);
}

void
md_assemble (char * str)
{
  static int last_insn_had_delay_slot = 0;
  openrisc_insn insn;
  char *    errmsg;

  /* Initialize GAS's cgen interface for a new instruction.  */
  gas_cgen_init_parse ();

  insn.insn = openrisc_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), 1, NULL);

  last_insn_had_delay_slot
    = CGEN_INSN_ATTR_VALUE (insn.insn, CGEN_INSN_DELAY_SLOT);
}


/* The syntax in the manual says constants begin with '#'.
   We just ignore it.  */

void
md_operand (expressionS * expressionP)
{
  if (* input_line_pointer == '#')
    {
      input_line_pointer ++;
      expression (expressionP);
    }
}

valueT
md_section_align (segT segment, valueT size)
{
  int align = bfd_get_section_alignment (stdoutput, segment);
  return ((size + (1 << align) - 1) & (-1 << align));
}

symbolS *
md_undefined_symbol (char * name ATTRIBUTE_UNUSED)
{
  return 0;
}

\f
/* Interface to relax_segment.  */

/* FIXME: Look through this.  */

const relax_typeS md_relax_table[] =
{
/* The fields are:
   1) most positive reach of this state,
   2) most negative reach of this state,
   3) how many bytes this mode will add to the size of the current frag
   4) which index into the table to try if we can't fit into this one.  */

  /* The first entry must be unused because an `rlx_more' value of zero ends
     each list.  */
  {1, 1, 0, 0},

  /* The displacement used by GAS is from the end of the 2 byte insn,
     so we subtract 2 from the following.  */
  /* 16 bit insn, 8 bit disp -> 10 bit range.
     This doesn't handle a branch in the right slot at the border:
     the "& -4" isn't taken into account.  It's not important enough to
     complicate things over it, so we subtract an extra 2 (or + 2 in -ve
     case).  */
  {511 - 2 - 2, -512 - 2 + 2, 0, 2 },
  /* 32 bit insn, 24 bit disp -> 26 bit range.  */
  {0x2000000 - 1 - 2, -0x2000000 - 2, 2, 0 },
  /* Same thing, but with leading nop for alignment.  */
  {0x2000000 - 1 - 2, -0x2000000 - 2, 4, 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 (fragS * fragP, segT segment)
{
  /* The only thing we have to handle here are symbols outside of the
     current segment.  They may be undefined or in a different segment in
     which case linker scripts may place them anywhere.
     However, we can't finish the fragment here and emit the reloc as insn
     alignment requirements may move the insn about.  */

  if (S_GET_SEGMENT (fragP->fr_symbol) != segment)
    {
      /* The symbol is undefined in this segment.
	 Change the relaxation subtype to the max allowable and leave
	 all further handling to md_convert_frag.  */
      fragP->fr_subtype = 2;

      {
	const CGEN_INSN * insn;
	int               i;

	/* Update the recorded insn.
	   Fortunately we don't have to look very far.
	   FIXME: Change this to record in the instruction the next higher
	   relaxable insn to use.  */
	for (i = 0, insn = fragP->fr_cgen.insn; i < 4; i++, insn++)
	  {
	    if ((strcmp (CGEN_INSN_MNEMONIC (insn),
			 CGEN_INSN_MNEMONIC (fragP->fr_cgen.insn))
		 == 0)
		&& CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED))
	      break;
	  }
	if (i == 4)
	  abort ();

	fragP->fr_cgen.insn = insn;
	return 2;
      }
    }

  return md_relax_table[fragP->fr_subtype].rlx_length;
}

/* *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 (bfd *   abfd ATTRIBUTE_UNUSED,
		 segT    sec  ATTRIBUTE_UNUSED,
		 fragS * fragP ATTRIBUTE_UNUSED)
{
  /* FIXME */
}

\f
/* Functions concerning relocs.  */

/* The location from which a PC relative jump should be calculated,
   given a PC relative reloc.  */

long
md_pcrel_from_section (fixS * fixP, segT sec)
{
  if (fixP->fx_addsy != (symbolS *) NULL
      && (! S_IS_DEFINED (fixP->fx_addsy)
	  || S_GET_SEGMENT (fixP->fx_addsy) != sec))
    /* The symbol is undefined (or is defined but not in this section).
       Let the linker figure it out.  */
    return 0;

  return (fixP->fx_frag->fr_address + fixP->fx_where) & ~1;
}


/* 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 (const CGEN_INSN *    insn ATTRIBUTE_UNUSED,
		      const CGEN_OPERAND * operand,
		      fixS *               fixP)
{
  bfd_reloc_code_real_type type;

  switch (operand->type)
    {
    case OPENRISC_OPERAND_ABS_26:
      fixP->fx_pcrel = 0;
      type = BFD_RELOC_OPENRISC_ABS_26;
      goto emit;
    case OPENRISC_OPERAND_DISP_26:
      fixP->fx_pcrel = 1;
      type = BFD_RELOC_OPENRISC_REL_26;
      goto emit;

    case OPENRISC_OPERAND_HI16:
      type = BFD_RELOC_HI16;
      goto emit;

    case OPENRISC_OPERAND_LO16:
      type = BFD_RELOC_LO16;
      goto emit;

    emit:
      return type;

    default : /* avoid -Wall warning */
      break;
    }

  return BFD_RELOC_NONE;
}
\f
/* Write a value out to the object file, using the appropriate endianness.  */

void
md_number_to_chars (char * buf, valueT val, int n)
{
  number_to_chars_bigendian (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 (int type, char * litP, int *  sizeP)
{
  int              i;
  int              prec;
  LITTLENUM_TYPE   words [MAX_LITTLENUMS];
  char *           t;

  switch (type)
    {
    case 'f':
    case 'F':
    case 's':
    case 'S':
      prec = 2;
      break;

    case 'd':
    case 'D':
    case 'r':
    case 'R':
      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);

  for (i = 0; i < prec; i++)
    {
      md_number_to_chars (litP, (valueT) words[i],
			  sizeof (LITTLENUM_TYPE));
      litP += sizeof (LITTLENUM_TYPE);
    }

  return 0;
}

bfd_boolean
openrisc_fix_adjustable (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;

  return 1;
}
Commit	Line	Data
c7e40348	1	/* tc-openrisc.c -- Assembler for the OpenRISC family.
30eb9c17	2	Copyright 2001, 2002, 2003, 2005 Free Software Foundation.
c7e40348 NC	3	Contributed by Johan Rydberg, jrydberg@opencores.org
	4
	5	This file is part of GAS, the GNU Assembler.
	6
	7	GAS is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2, or (at your option)
	10	any later version.
	11
	12	GAS is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with GAS; see the file COPYING. If not, write to
	19	the Free Software Foundation, 59 Temple Place - Suite 330,
	20	Boston, MA 02111-1307, USA. */
	21
	22	#include <stdio.h>
c7e40348 NC	23	#include "as.h"
	24	#include "subsegs.h"
	25	#include "symcat.h"
	26	#include "opcodes/openrisc-desc.h"
	27	#include "opcodes/openrisc-opc.h"
	28	#include "cgen.h"
	29
	30	/* Structure to hold all of the different components describing
	31	an individual instruction. */
	32	typedef struct openrisc_insn openrisc_insn;
	33
	34	struct openrisc_insn
	35	{
	36	const CGEN_INSN * insn;
	37	const CGEN_INSN * orig_insn;
	38	CGEN_FIELDS fields;
	39	#if CGEN_INT_INSN_P
	40	CGEN_INSN_INT buffer [1];
	41	#define INSN_VALUE(buf) (*(buf))
	42	#else
	43	unsigned char buffer [CGEN_MAX_INSN_SIZE];
	44	#define INSN_VALUE(buf) (buf)
	45	#endif
	46	char * addr;
	47	fragS * frag;
	48	int num_fixups;
	49	fixS * fixups [GAS_CGEN_MAX_FIXUPS];
	50	int indices [MAX_OPERAND_INSTANCES];
	51	};
	52
	53
	54	const char comment_chars[] = "#";
	55	const char line_comment_chars[] = "#";
	56	const char line_separator_chars[] = ";";
	57	const char EXP_CHARS[] = "eE";
	58	const char FLT_CHARS[] = "dD";
	59
	60	\f
	61	#define OPENRISC_SHORTOPTS "m:"
	62	const char * md_shortopts = OPENRISC_SHORTOPTS;
	63
	64	struct option md_longopts[] =
	65	{
	66	{NULL, no_argument, NULL, 0}
	67	};
	68	size_t md_longopts_size = sizeof (md_longopts);
	69
	70	unsigned long openrisc_machine = 0; /* default */
	71
	72	int
ea1562b3	73	md_parse_option (int c ATTRIBUTE_UNUSED, char * arg ATTRIBUTE_UNUSED)
c7e40348 NC	74	{
	75	return 0;
	76	}
	77
	78	void
ea1562b3	79	md_show_usage (FILE * stream ATTRIBUTE_UNUSED)
c7e40348 NC	80	{
	81	}
	82
	83	static void
ea1562b3	84	ignore_pseudo (int val ATTRIBUTE_UNUSED)
c7e40348 NC	85	{
	86	discard_rest_of_line ();
	87	}
	88
	89	const char openrisc_comment_chars [] = ";#";
	90
	91	/* The target specific pseudo-ops which we support. */
	92	const pseudo_typeS md_pseudo_table[] =
	93	{
	94	{ "word", cons, 4 },
	95	{ "proc", ignore_pseudo, 0 },
	96	{ "endproc", ignore_pseudo, 0 },
	97	{ NULL, NULL, 0 }
	98	};
	99
	100
	101	\f
	102	void
ea1562b3	103	md_begin (void)
c7e40348 NC	104	{
	105	/* Initialize the `cgen' interface. */
	106
	107	/* Set the machine number and endian. */
	108	gas_cgen_cpu_desc = openrisc_cgen_cpu_open (CGEN_CPU_OPEN_MACHS, 0,
	109	CGEN_CPU_OPEN_ENDIAN,
	110	CGEN_ENDIAN_BIG,
	111	CGEN_CPU_OPEN_END);
	112	openrisc_cgen_init_asm (gas_cgen_cpu_desc);
	113
	114	/* This is a callback from cgen to gas to parse operands. */
	115	cgen_set_parse_operand_fn (gas_cgen_cpu_desc, gas_cgen_parse_operand);
	116	}
	117
	118	void
ea1562b3	119	md_assemble (char * str)
c7e40348 NC	120	{
	121	static int last_insn_had_delay_slot = 0;
	122	openrisc_insn insn;
	123	char * errmsg;
	124
	125	/* Initialize GAS's cgen interface for a new instruction. */
	126	gas_cgen_init_parse ();
	127
	128	insn.insn = openrisc_cgen_assemble_insn
	129	(gas_cgen_cpu_desc, str, & insn.fields, insn.buffer, & errmsg);
	130
	131	if (!insn.insn)
	132	{
	133	as_bad (errmsg);
	134	return;
	135	}
	136
	137	/* Doesn't really matter what we pass for RELAX_P here. */
	138	gas_cgen_finish_insn (insn.insn, insn.buffer,
	139	CGEN_FIELDS_BITSIZE (& insn.fields), 1, NULL);
	140
c7e40348 NC	141	last_insn_had_delay_slot
	142	= CGEN_INSN_ATTR_VALUE (insn.insn, CGEN_INSN_DELAY_SLOT);
	143	}
	144
	145
	146	/* The syntax in the manual says constants begin with '#'.
	147	We just ignore it. */
	148
	149	void
ea1562b3	150	md_operand (expressionS * expressionP)
c7e40348 NC	151	{
	152	if (* input_line_pointer == '#')
	153	{
	154	input_line_pointer ++;
	155	expression (expressionP);
	156	}
	157	}
	158
	159	valueT
ea1562b3	160	md_section_align (segT segment, valueT size)
c7e40348 NC	161	{
	162	int align = bfd_get_section_alignment (stdoutput, segment);
	163	return ((size + (1 << align) - 1) & (-1 << align));
	164	}
	165
	166	symbolS *
ea1562b3	167	md_undefined_symbol (char * name ATTRIBUTE_UNUSED)
c7e40348 NC	168	{
	169	return 0;
	170	}
	171
	172	\f
	173	/* Interface to relax_segment. */
	174
	175	/* FIXME: Look through this. */
	176
	177	const relax_typeS md_relax_table[] =
	178	{
	179	/* The fields are:
	180	1) most positive reach of this state,
	181	2) most negative reach of this state,
	182	3) how many bytes this mode will add to the size of the current frag
	183	4) which index into the table to try if we can't fit into this one. */
	184
	185	/* The first entry must be unused because an `rlx_more' value of zero ends
	186	each list. */
	187	{1, 1, 0, 0},
	188
	189	/* The displacement used by GAS is from the end of the 2 byte insn,
	190	so we subtract 2 from the following. */
	191	/* 16 bit insn, 8 bit disp -> 10 bit range.
	192	This doesn't handle a branch in the right slot at the border:
	193	the "& -4" isn't taken into account. It's not important enough to
	194	complicate things over it, so we subtract an extra 2 (or + 2 in -ve
	195	case). */
	196	{511 - 2 - 2, -512 - 2 + 2, 0, 2 },
	197	/* 32 bit insn, 24 bit disp -> 26 bit range. */
	198	{0x2000000 - 1 - 2, -0x2000000 - 2, 2, 0 },
	199	/* Same thing, but with leading nop for alignment. */
	200	{0x2000000 - 1 - 2, -0x2000000 - 2, 4, 0 }
	201	};
	202
c7e40348 NC	203	/* Return an initial guess of the length by which a fragment must grow to
	204	hold a branch to reach its destination.
	205	Also updates fr_type/fr_subtype as necessary.
	206
	207	Called just before doing relaxation.
	208	Any symbol that is now undefined will not become defined.
	209	The guess for fr_var is ACTUALLY the growth beyond fr_fix.
	210	Whatever we do to grow fr_fix or fr_var contributes to our returned value.
	211	Although it may not be explicit in the frag, pretend fr_var starts with a
	212	0 value. */
	213
	214	int
ea1562b3	215	md_estimate_size_before_relax (fragS * fragP, segT segment)
c7e40348	216	{
c7e40348 NC	217	/* The only thing we have to handle here are symbols outside of the
	218	current segment. They may be undefined or in a different segment in
	219	which case linker scripts may place them anywhere.
	220	However, we can't finish the fragment here and emit the reloc as insn
	221	alignment requirements may move the insn about. */
	222
	223	if (S_GET_SEGMENT (fragP->fr_symbol) != segment)
	224	{
	225	/* The symbol is undefined in this segment.
	226	Change the relaxation subtype to the max allowable and leave
	227	all further handling to md_convert_frag. */
	228	fragP->fr_subtype = 2;
	229
	230	{
	231	const CGEN_INSN * insn;
	232	int i;
	233
	234	/* Update the recorded insn.
	235	Fortunately we don't have to look very far.
	236	FIXME: Change this to record in the instruction the next higher
	237	relaxable insn to use. */
	238	for (i = 0, insn = fragP->fr_cgen.insn; i < 4; i++, insn++)
	239	{
	240	if ((strcmp (CGEN_INSN_MNEMONIC (insn),
	241	CGEN_INSN_MNEMONIC (fragP->fr_cgen.insn))
	242	== 0)
b11dcf4e	243	&& CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED))
c7e40348 NC	244	break;
	245	}
	246	if (i == 4)
	247	abort ();
	248
	249	fragP->fr_cgen.insn = insn;
	250	return 2;
	251	}
	252	}
	253
606ab118	254	return md_relax_table[fragP->fr_subtype].rlx_length;
c7e40348 NC	255	}
	256
	257	/* *fragP has been relaxed to its final size, and now needs to have
	258	the bytes inside it modified to conform to the new size.
	259
	260	Called after relaxation is finished.
	261	fragP->fr_type == rs_machine_dependent.
	262	fragP->fr_subtype is the subtype of what the address relaxed to. */
	263
	264	void
ea1562b3 NC	265	md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED,
	266	segT sec ATTRIBUTE_UNUSED,
	267	fragS * fragP ATTRIBUTE_UNUSED)
c7e40348 NC	268	{
	269	/* FIXME */
	270	}
	271
	272	\f
	273	/* Functions concerning relocs. */
	274
	275	/* The location from which a PC relative jump should be calculated,
	276	given a PC relative reloc. */
	277
	278	long
ea1562b3	279	md_pcrel_from_section (fixS * fixP, segT sec)
c7e40348 NC	280	{
	281	if (fixP->fx_addsy != (symbolS *) NULL
	282	&& (! S_IS_DEFINED (fixP->fx_addsy)
	283	\|\| S_GET_SEGMENT (fixP->fx_addsy) != sec))
ea1562b3 NC	284	/* The symbol is undefined (or is defined but not in this section).
	285	Let the linker figure it out. */
	286	return 0;
c7e40348 NC	287
	288	return (fixP->fx_frag->fr_address + fixP->fx_where) & ~1;
	289	}
	290
	291
	292	/* Return the bfd reloc type for OPERAND of INSN at fixup FIXP.
	293	Returns BFD_RELOC_NONE if no reloc type can be found.
	294	FIXP may be modified if desired. /
	295
	296	bfd_reloc_code_real_type
ea1562b3 NC	297	md_cgen_lookup_reloc (const CGEN_INSN * insn ATTRIBUTE_UNUSED,
	298	const CGEN_OPERAND * operand,
	299	fixS * fixP)
c7e40348 NC	300	{
	301	bfd_reloc_code_real_type type;
	302
	303	switch (operand->type)
	304	{
5d6255fe KH	305	case OPENRISC_OPERAND_ABS_26:
5d6255fe KH	306	fixP->fx_pcrel = 0;
c7e40348 NC	307	type = BFD_RELOC_OPENRISC_ABS_26;
c7e40348 NC	308	goto emit;
5d6255fe KH	309	case OPENRISC_OPERAND_DISP_26:
5d6255fe KH	310	fixP->fx_pcrel = 1;
c7e40348 NC	311	type = BFD_RELOC_OPENRISC_REL_26;
	312	goto emit;
	313
	314	case OPENRISC_OPERAND_HI16:
	315	type = BFD_RELOC_HI16;
	316	goto emit;
	317
	318	case OPENRISC_OPERAND_LO16:
	319	type = BFD_RELOC_LO16;
	320	goto emit;
	321
	322	emit:
	323	return type;
	324
	325	default : /* avoid -Wall warning */
	326	break;
	327	}
	328
	329	return BFD_RELOC_NONE;
	330	}
c7e40348 NC	331	\f
	332	/* Write a value out to the object file, using the appropriate endianness. */
	333
	334	void
ea1562b3	335	md_number_to_chars (char * buf, valueT val, int n)
c7e40348 NC	336	{
	337	number_to_chars_bigendian (buf, val, n);
	338	}
	339
	340	/* Turn a string in input_line_pointer into a floating point constant of type
	341	type, and store the appropriate bytes in *litP. The number of LITTLENUMS
	342	emitted is stored in *sizeP . An error message is returned, or NULL on OK.
	343	*/
	344
	345	/* Equal to MAX_PRECISION in atof-ieee.c */
	346	#define MAX_LITTLENUMS 6
	347
	348	char *
ea1562b3	349	md_atof (int type, char * litP, int * sizeP)
c7e40348 NC	350	{
	351	int i;
	352	int prec;
	353	LITTLENUM_TYPE words [MAX_LITTLENUMS];
	354	char * t;
c7e40348 NC	355
	356	switch (type)
	357	{
	358	case 'f':
	359	case 'F':
	360	case 's':
	361	case 'S':
	362	prec = 2;
	363	break;
	364
	365	case 'd':
	366	case 'D':
	367	case 'r':
	368	case 'R':
	369	prec = 4;
	370	break;
	371
	372	/* FIXME: Some targets allow other format chars for bigger sizes here. */
	373
	374	default:
	375	* sizeP = 0;
	376	return _("Bad call to md_atof()");
	377	}
	378
	379	t = atof_ieee (input_line_pointer, type, words);
	380	if (t)
	381	input_line_pointer = t;
	382	* sizeP = prec * sizeof (LITTLENUM_TYPE);
	383
	384	for (i = 0; i < prec; i++)
	385	{
	386	md_number_to_chars (litP, (valueT) words[i],
	387	sizeof (LITTLENUM_TYPE));
	388	litP += sizeof (LITTLENUM_TYPE);
	389	}
	390
	391	return 0;
	392	}
	393
b34976b6	394	bfd_boolean
ea1562b3	395	openrisc_fix_adjustable (fixS * fixP)
c7e40348	396	{
ea1562b3	397	/* We need the symbol name for the VTABLE entries. */
c7e40348 NC	398	if (fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT
c7e40348 NC	399	\|\| fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
5d6255fe	400	return 0;
c7e40348 NC	401
	402	return 1;
	403	}