[binutils.git] / gdb / rs6000-pinsn.c

/* Print IBM RS/6000 instructions for GNU software.
   Copyright 1991 Free Software Foundation, Inc.
   Contributed by IBM Corporation.

This file is part of GDB and the GNU binutils.

This program 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 of the License, or
(at your option) any later version.

This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include "defs.h"
#include "opcode/rs6k.h"

/* Print the rs6k instruction at address MEMADDR in debugged memory,
   on STREAM.  Returns length of the instruction, in bytes.  */

int
print_insn (memaddr, stream)
  CORE_ADDR memaddr;
  FILE *stream;
{
	int  pop, eop, probable_eop;	/* primary and extended opcodes */
	int  min, max;
	int  best = -1;			/* found best opcode index	*/
	int  oldbest = -1;
	unsigned int the_insn;

	read_memory (memaddr, &the_insn, sizeof (the_insn));
	pop = (unsigned)(the_insn >> 26);
	min = 0, max = NOPCODES-1;

	while (min < max) {
	  best = (min + max) / 2;

	  /* see if we are running in loops */
	  if (best == oldbest)
	    goto not_found;
	  oldbest = best;

	  if (pop < rs6k_ops [best].p_opcode)
	    max = best;

	  else if (pop > rs6k_ops [best].p_opcode)
	    min = best;

	  else {
	    /* Opcode matched, check extended opcode. */

	    if (rs6k_ops [best].e_opcode == -1) {
	      /* there is no valid extended opcode, what we've got is
		 just fine. */
	      goto insn_found;
	    }

	    /* Largest possible value of extended opcode. */
	    probable_eop = ((the_insn) >> 1) & 0x3ff;

	    eop = probable_eop & eopMask [rs6k_ops [best].format];

	    if (eop < rs6k_ops [best].e_opcode) {

	      while (pop == rs6k_ops [best].p_opcode) {
		if (eop == rs6k_ops [best].e_opcode)	/* found it! */
		  goto insn_found;
	        --best;
	        eop = probable_eop & eopMask [rs6k_ops [best].format];
	      }
	      goto not_found;
	    }

	    else if (eop > rs6k_ops [best].e_opcode) {

	      while (pop == rs6k_ops [best].p_opcode) {
		if (eop == rs6k_ops [best].e_opcode)	/* found it! */
		  goto insn_found;
	        ++best;
	        eop = probable_eop & eopMask [rs6k_ops [best].format];
	      }
	      goto not_found;
	    }

	    else /*  eop == rs6k_ops [best].e_opcode */
	      goto insn_found;
	  }
	}	

	best = min;
	if (pop == rs6k_ops [best].p_opcode &&
           (rs6k_ops [best].e_opcode == -1 || rs6k_ops [best].e_opcode == eop))
	    goto insn_found;

	else
	  goto not_found;


insn_found:
	print_operator (stream, memaddr, the_insn, best);
	return 4;

not_found:
	fprintf (stream, "0x%08x", the_insn);
	return 4;
}


/* condition code names */
static char *cond_code [] = {
  "lt", "gt", "eq", "so", "ge", "le", "ne", "ns", "nl", "ng", "z", "nz" };


print_operator (stream, memaddr, insn_word, insn_no)
FILE	*stream;
long	memaddr;
long	insn_word;
int	insn_no;
{
  char buf [20];
  char *qq = buf;
  char *pp = rs6k_ops[insn_no].opr_ext;
  int tmp;
  int nocomma = 0;			/* true if no comma needed */

  if (pp) {
    while (*pp) {

      switch ( *pp ) {
	case '.':
	  if (insn_word & 0x1)
	    *qq++ = '.';
	  break;

	case 'l':
	  if (insn_word & 0x1)
	   *qq++ = 'l';
	  break;

	case 't':
	  if ((insn_word & 0x03e00000) == 0x01800000)
	   *qq++ = 't';
	  break;

	case 'f':
	  if ((insn_word & 0x03e00000) == 0x00800000)
	   *qq++ = 'f';
	  break;

	case 'a':
	  if (insn_word & 0x2)
	   *qq++ = 'a';
	  break;

	case 'o':
	  if (insn_word & 0x4000)
	   *qq++ = 'o';
	  break;

	case '1':		/* exception #1 for bb/bc ambiguity */
	  tmp = (insn_word >> 21) & 0x1f;	/* extract BO	*/
	  if (tmp != 0xc && tmp != 0x4) {
	    /* you can't use `bb' now. switch to `bc' */
	    *(qq-1) = 'c';
	    ++insn_no;
	    pp = rs6k_ops[insn_no].opr_ext;
	    continue;
	  }
	  break;

	default:
	  abort ();
      }
      ++pp;
    }
  }
  *qq = '\0';

  fprintf (stream, "%s%s\t", rs6k_ops[insn_no].operator, buf);

  /* parse the operand now. */
  pp = rs6k_ops[insn_no].oprnd_format;

  while (1) {
    switch (*pp) {
      case TO	:
	fprintf (stream, "%d", (insn_word >> 21) & 0x1f);
	break;

      case RT	:
      case RS	:
	fprintf (stream, "r%d", (insn_word >> 21) & 0x1f);
	break;

      case LI	:
	tmp  = (insn_word >> 16) & 0x1f;
	if (tmp > 11) {
	  fprintf (stream, "{unknown cond code: 0x%x}", insn_word);
	  tmp = 0;
	}
	fprintf (stream, "%s", cond_code [tmp]);
	break;

      case A2	:
      case TA14	:
	tmp = (insn_word & 0xfffc);
	if (tmp & 0x8000)		/* fix sign extension	*/
	  tmp -= 0x10000;

	if ((insn_word & 0x2) == 0)	/* if AA not set	*/
	  tmp += memaddr;

        print_address (tmp, stream);
	break;

      case TA24	:
	tmp = insn_word & 0x03fffffc;
	if (tmp & 0x2000000)
	  tmp -= 0x4000000;
	
	if ((insn_word & 0x2) == 0)		/* if no AA bit set */
	  tmp += memaddr;

        print_address (tmp, stream);
	break;

      case LEV	:			/* for svc only */
	if (insn_word & 0x2) {		/* SA is set	*/
	  nocomma = 1;
	}
	else
          fprintf (stream, "%d", (insn_word >> 5) & 0x7f);
	break;

      case FL1	:			/* for svc only */
	if (insn_word & 0x2) {		/* SA is set	*/
	  nocomma = 1;
	}
	else
          fprintf (stream, "%d", (insn_word >> 12) & 0xf);
	break;

      case FL2	:			/* for svc only	*/
	nocomma = 0;
	if (insn_word & 0x2)		/* SA is set	*/
	  fprintf (stream, "%d", (insn_word >> 2) & 0x3fff);
	else
          fprintf (stream, "%d", (insn_word >> 2) & 0x7);
	break;

      case RA	:
	if (nocomma) {
	  fprintf (stream, "r%d)", (insn_word >> 16) & 0x1f);
	  nocomma = 0;
	}
	else
	  fprintf (stream, "r%d", (insn_word >> 16) & 0x1f);
	break;

      case RB	:
	fprintf (stream, "r%d", (insn_word >> 11) & 0x1f);
	break;

      case SI	:
	tmp = insn_word & 0xffff;
	if (tmp & 0x8000)
	  tmp -= 0x10000;
	fprintf (stream, "%d", tmp);
	break;

      case UI	:
	fprintf (stream, "%d", insn_word & 0xffff);
	break;

      case BF	:
	fprintf (stream, "%d", (insn_word >> 23) & 0x7);
	break;

      case BFA	:
	fprintf (stream, "%d", (insn_word >> 18) & 0x7);
	break;

      case BT	:
	fprintf (stream, "%d", (insn_word >> 21) & 0x1f);
	break;

      case BA	:
	fprintf (stream, "%d", (insn_word >> 16) & 0x1f);
	break;

      case BB	:
	fprintf (stream, "%d", (insn_word >> 11) & 0x1f);
	break;

      case BO	:
	fprintf (stream, "%d", (insn_word >> 21) & 0x1f);
	break;

      case BI	:
	fprintf (stream, "%d", (insn_word >> 16) & 0x1f);
	break;

      case SH	:
	fprintf (stream, "%d", (insn_word >> 11) & 0x1f);
	break;

      case MB	:
	fprintf (stream, "0x%x", (insn_word >> 6) & 0x1f);
	break;

      case ME	:
	fprintf (stream, "0x%x", (insn_word >> 1) & 0x1f);
	break;

      case SPR	:
	fprintf (stream, "%d", (insn_word >> 16) & 0x1f);
	break;

      case DIS	:
	nocomma = 1;
	tmp = insn_word & 0xffff;
	if (tmp & 0x8000)
	  tmp -= 0x10000;
	fprintf (stream, "%d(", tmp);
	break;

      case FXM	:
	fprintf (stream, "0x%x", (insn_word >> 12) & 0xff);
	break;

      case FRT	:
      case FRS	:
	fprintf (stream, "f%d", (insn_word >> 21) & 0x1f);
	break;

      case FRA	:
	fprintf (stream, "f%d", (insn_word >> 16) & 0x1f);
	break;

      case FRB	:
	fprintf (stream, "f%d", (insn_word >> 11) & 0x1f);
	break;

      case FRC	:
	fprintf (stream, "f%d", (insn_word >> 6) & 0x1f);
	break;

      case FLM	:
	fprintf (stream, "0x%x", (insn_word >> 17) & 0xff);
	break;

      case NB	:
	fprintf (stream, "%d", (insn_word >> 11) & 0x1f);
	break;

      case I	:
	fprintf (stream, "%d", (insn_word >> 12) & 0xf);
	break;

      default	:
	fprintf (stream,
		 "{Internal error: Unknown operand format identifier %d}",
		 *pp);
    }
    ++pp;

    if (*pp == '\0')
      break;
    else if (!nocomma)
      fputc(',', stream);
  }
}
Commit	Line	Data
6373dbe3 JG	1	/* Print IBM RS/6000 instructions for GNU software.
	2	Copyright 1991 Free Software Foundation, Inc.
	3	Contributed by IBM Corporation.
41abdfbd	4
6373dbe3 JG	5	This file is part of GDB and the GNU binutils.
	6
	7	This program 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 of the License, or
	10	(at your option) any later version.
	11
	12	This program 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 this program; if not, write to the Free Software
	19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
41abdfbd	20
41abdfbd	21	#include "defs.h"
14832b2e	22	#include "opcode/rs6k.h"
41abdfbd	23
41abdfbd JG	24	/* Print the rs6k instruction at address MEMADDR in debugged memory,
	25	on STREAM. Returns length of the instruction, in bytes. */
	26
	27	int
	28	print_insn (memaddr, stream)
	29	CORE_ADDR memaddr;
	30	FILE *stream;
	31	{
d453b386	32	int pop, eop, probable_eop; /* primary and extended opcodes */
41abdfbd JG	33	int min, max;
	34	int best = -1; /* found best opcode index */
	35	int oldbest = -1;
	36	unsigned int the_insn;
	37
	38	read_memory (memaddr, &the_insn, sizeof (the_insn));
	39	pop = (unsigned)(the_insn >> 26);
41abdfbd JG	40	min = 0, max = NOPCODES-1;
	41
	42	while (min < max) {
	43	best = (min + max) / 2;
	44
	45	/* see if we are running in loops */
	46	if (best == oldbest)
	47	goto not_found;
	48	oldbest = best;
	49
	50	if (pop < rs6k_ops [best].p_opcode)
	51	max = best;
	52
	53	else if (pop > rs6k_ops [best].p_opcode)
	54	min = best;
	55
	56	else {
d453b386	57	/* Opcode matched, check extended opcode. */
41abdfbd JG	58
	59	if (rs6k_ops [best].e_opcode == -1) {
	60	/* there is no valid extended opcode, what we've got is
	61	just fine. */
	62	goto insn_found;
	63	}
	64
d453b386 PB	65	/* Largest possible value of extended opcode. */
	66	probable_eop = ((the_insn) >> 1) & 0x3ff;
	67
	68	eop = probable_eop & eopMask [rs6k_ops [best].format];
	69
	70	if (eop < rs6k_ops [best].e_opcode) {
41abdfbd JG	71
	72	while (pop == rs6k_ops [best].p_opcode) {
	73	if (eop == rs6k_ops [best].e_opcode) /* found it! */
	74	goto insn_found;
	75	--best;
d453b386	76	eop = probable_eop & eopMask [rs6k_ops [best].format];
41abdfbd JG	77	}
	78	goto not_found;
	79	}
	80
	81	else if (eop > rs6k_ops [best].e_opcode) {
	82
	83	while (pop == rs6k_ops [best].p_opcode) {
	84	if (eop == rs6k_ops [best].e_opcode) /* found it! */
	85	goto insn_found;
	86	++best;
d453b386	87	eop = probable_eop & eopMask [rs6k_ops [best].format];
41abdfbd JG	88	}
	89	goto not_found;
	90	}
	91
	92	else /* eop == rs6k_ops [best].e_opcode */
	93	goto insn_found;
	94	}
	95	}
	96
	97	best = min;
	98	if (pop == rs6k_ops [best].p_opcode &&
	99	(rs6k_ops [best].e_opcode == -1 \|\| rs6k_ops [best].e_opcode == eop))
	100	goto insn_found;
	101
	102	else
	103	goto not_found;
	104
	105
	106	insn_found:
	107	print_operator (stream, memaddr, the_insn, best);
	108	return 4;
	109
	110	not_found:
	111	fprintf (stream, "0x%08x", the_insn);
	112	return 4;
	113	}
	114
	115
	116
	117	/* condition code names */
	118	static char *cond_code [] = {
	119	"lt", "gt", "eq", "so", "ge", "le", "ne", "ns", "nl", "ng", "z", "nz" };
	120
	121
	122	print_operator (stream, memaddr, insn_word, insn_no)
	123	FILE *stream;
	124	long memaddr;
	125	long insn_word;
	126	int insn_no;
	127	{
9efdc2fe	128	char buf [20];
41abdfbd JG	129	char *qq = buf;
	130	char *pp = rs6k_ops[insn_no].opr_ext;
	131	int tmp;
	132	int nocomma = 0; /* true if no comma needed */
	133
41abdfbd JG	134	if (pp) {
	135	while (*pp) {
	136
	137	switch ( *pp ) {
	138	case '.':
	139	if (insn_word & 0x1)
9efdc2fe	140	*qq++ = '.';
41abdfbd JG	141	break;
	142
	143	case 'l':
	144	if (insn_word & 0x1)
	145	*qq++ = 'l';
	146	break;
	147
	148	case 't':
	149	if ((insn_word & 0x03e00000) == 0x01800000)
	150	*qq++ = 't';
	151	break;
	152
	153	case 'f':
	154	if ((insn_word & 0x03e00000) == 0x00800000)
	155	*qq++ = 'f';
	156	break;
	157
	158	case 'a':
	159	if (insn_word & 0x2)
	160	*qq++ = 'a';
	161	break;
	162
	163	case 'o':
	164	if (insn_word & 0x4000)
	165	*qq++ = 'o';
	166	break;
	167
	168	case '1': /* exception #1 for bb/bc ambiguity */
	169	tmp = (insn_word >> 21) & 0x1f; /* extract BO */
	170	if (tmp != 0xc && tmp != 0x4) {
	171	/* you can't use `bb' now. switch to `bc' */
	172	*(qq-1) = 'c';
	173	++insn_no;
	174	pp = rs6k_ops[insn_no].opr_ext;
	175	continue;
	176	}
	177	break;
	178
	179	default:
	180	abort ();
	181	}
	182	++pp;
	183	}
	184	}
9efdc2fe	185	*qq = '\0';
41abdfbd	186
9efdc2fe	187	fprintf (stream, "%s%s\t", rs6k_ops[insn_no].operator, buf);
41abdfbd JG	188
	189	/* parse the operand now. */
	190	pp = rs6k_ops[insn_no].oprnd_format;
	191
	192	while (1) {
	193	switch (*pp) {
	194	case TO :
9efdc2fe	195	fprintf (stream, "%d", (insn_word >> 21) & 0x1f);
41abdfbd JG	196	break;
	197
	198	case RT :
	199	case RS :
9efdc2fe	200	fprintf (stream, "r%d", (insn_word >> 21) & 0x1f);
41abdfbd JG	201	break;
	202
	203	case LI :
	204	tmp = (insn_word >> 16) & 0x1f;
	205	if (tmp > 11) {
9efdc2fe	206	fprintf (stream, "{unknown cond code: 0x%x}", insn_word);
41abdfbd JG	207	tmp = 0;
41abdfbd JG	208	}
9efdc2fe	209	fprintf (stream, "%s", cond_code [tmp]);
41abdfbd JG	210	break;
41abdfbd JG	211
41abdfbd JG	212	case A2 :
	213	case TA14 :
	214	tmp = (insn_word & 0xfffc);
	215	if (tmp & 0x8000) /* fix sign extension */
	216	tmp -= 0x10000;
	217
	218	if ((insn_word & 0x2) == 0) /* if AA not set */
	219	tmp += memaddr;
	220
9efdc2fe	221	print_address (tmp, stream);
41abdfbd JG	222	break;
	223
	224	case TA24 :
	225	tmp = insn_word & 0x03fffffc;
	226	if (tmp & 0x2000000)
	227	tmp -= 0x4000000;
	228
	229	if ((insn_word & 0x2) == 0) /* if no AA bit set */
	230	tmp += memaddr;
	231
9efdc2fe	232	print_address (tmp, stream);
41abdfbd JG	233	break;
	234
	235	case LEV : /* for svc only */
	236	if (insn_word & 0x2) { /* SA is set */
	237	nocomma = 1;
41abdfbd JG	238	}
41abdfbd JG	239	else
9efdc2fe	240	fprintf (stream, "%d", (insn_word >> 5) & 0x7f);
41abdfbd JG	241	break;
	242
	243	case FL1 : /* for svc only */
	244	if (insn_word & 0x2) { /* SA is set */
	245	nocomma = 1;
41abdfbd JG	246	}
41abdfbd JG	247	else
9efdc2fe	248	fprintf (stream, "%d", (insn_word >> 12) & 0xf);
41abdfbd JG	249	break;
	250
	251	case FL2 : /* for svc only */
	252	nocomma = 0;
	253	if (insn_word & 0x2) /* SA is set */
9efdc2fe	254	fprintf (stream, "%d", (insn_word >> 2) & 0x3fff);
41abdfbd	255	else
9efdc2fe	256	fprintf (stream, "%d", (insn_word >> 2) & 0x7);
41abdfbd JG	257	break;
	258
	259	case RA :
	260	if (nocomma) {
9efdc2fe	261	fprintf (stream, "r%d)", (insn_word >> 16) & 0x1f);
41abdfbd JG	262	nocomma = 0;
	263	}
	264	else
9efdc2fe	265	fprintf (stream, "r%d", (insn_word >> 16) & 0x1f);
41abdfbd JG	266	break;
	267
	268	case RB :
9efdc2fe	269	fprintf (stream, "r%d", (insn_word >> 11) & 0x1f);
41abdfbd JG	270	break;
	271
	272	case SI :
	273	tmp = insn_word & 0xffff;
	274	if (tmp & 0x8000)
	275	tmp -= 0x10000;
9efdc2fe	276	fprintf (stream, "%d", tmp);
41abdfbd JG	277	break;
	278
	279	case UI :
9efdc2fe	280	fprintf (stream, "%d", insn_word & 0xffff);
41abdfbd JG	281	break;
	282
	283	case BF :
9efdc2fe	284	fprintf (stream, "%d", (insn_word >> 23) & 0x7);
41abdfbd JG	285	break;
	286
	287	case BFA :
9efdc2fe	288	fprintf (stream, "%d", (insn_word >> 18) & 0x7);
41abdfbd JG	289	break;
	290
	291	case BT :
9efdc2fe	292	fprintf (stream, "%d", (insn_word >> 21) & 0x1f);
41abdfbd JG	293	break;
	294
	295	case BA :
9efdc2fe	296	fprintf (stream, "%d", (insn_word >> 16) & 0x1f);
41abdfbd JG	297	break;
	298
	299	case BB :
9efdc2fe	300	fprintf (stream, "%d", (insn_word >> 11) & 0x1f);
41abdfbd JG	301	break;
	302
	303	case BO :
9efdc2fe	304	fprintf (stream, "%d", (insn_word >> 21) & 0x1f);
41abdfbd JG	305	break;
	306
	307	case BI :
9efdc2fe	308	fprintf (stream, "%d", (insn_word >> 16) & 0x1f);
41abdfbd JG	309	break;
	310
	311	case SH :
9efdc2fe	312	fprintf (stream, "%d", (insn_word >> 11) & 0x1f);
41abdfbd JG	313	break;
	314
	315	case MB :
9efdc2fe	316	fprintf (stream, "0x%x", (insn_word >> 6) & 0x1f);
41abdfbd JG	317	break;
	318
	319	case ME :
9efdc2fe	320	fprintf (stream, "0x%x", (insn_word >> 1) & 0x1f);
41abdfbd JG	321	break;
	322
	323	case SPR :
9efdc2fe	324	fprintf (stream, "%d", (insn_word >> 16) & 0x1f);
41abdfbd JG	325	break;
	326
	327	case DIS :
	328	nocomma = 1;
	329	tmp = insn_word & 0xffff;
	330	if (tmp & 0x8000)
	331	tmp -= 0x10000;
9efdc2fe	332	fprintf (stream, "%d(", tmp);
41abdfbd JG	333	break;
	334
	335	case FXM :
9efdc2fe	336	fprintf (stream, "0x%x", (insn_word >> 12) & 0xff);
41abdfbd JG	337	break;
	338
	339	case FRT :
	340	case FRS :
9efdc2fe	341	fprintf (stream, "f%d", (insn_word >> 21) & 0x1f);
41abdfbd JG	342	break;
	343
	344	case FRA :
9efdc2fe	345	fprintf (stream, "f%d", (insn_word >> 16) & 0x1f);
41abdfbd JG	346	break;
	347
	348	case FRB :
9efdc2fe	349	fprintf (stream, "f%d", (insn_word >> 11) & 0x1f);
41abdfbd JG	350	break;
	351
	352	case FRC :
9efdc2fe	353	fprintf (stream, "f%d", (insn_word >> 6) & 0x1f);
41abdfbd JG	354	break;
	355
	356	case FLM :
9efdc2fe	357	fprintf (stream, "0x%x", (insn_word >> 17) & 0xff);
41abdfbd JG	358	break;
	359
	360	case NB :
9efdc2fe	361	fprintf (stream, "%d", (insn_word >> 11) & 0x1f);
41abdfbd JG	362	break;
	363
	364	case I :
9efdc2fe	365	fprintf (stream, "%d", (insn_word >> 12) & 0xf);
41abdfbd JG	366	break;
	367
	368	default :
9efdc2fe PB	369	fprintf (stream,
	370	"{Internal error: Unknown operand format identifier %d}",
	371	*pp);
41abdfbd	372	}
41abdfbd JG	373	++pp;
	374
	375	if (*pp == '\0')
	376	break;
	377	else if (!nocomma)
9efdc2fe	378	fputc(',', stream);
41abdfbd	379	}
41abdfbd	380	}