[linux-2.6-block.git] / arch / powerpc / xmon / spu-dis.c

// SPDX-License-Identifier: GPL-2.0-or-later
/* Disassemble SPU instructions

   Copyright 2006 Free Software Foundation, Inc.

   This file is part of GDB, GAS, and the GNU binutils.

 */

#include <linux/string.h>
#include "nonstdio.h"
#include "ansidecl.h"
#include "spu.h"
#include "dis-asm.h"

/* This file provides a disassembler function which uses
   the disassembler interface defined in dis-asm.h.   */

extern const struct spu_opcode spu_opcodes[];
extern const int spu_num_opcodes;

#define SPU_DISASM_TBL_SIZE (1 << 11)
static const struct spu_opcode *spu_disassemble_table[SPU_DISASM_TBL_SIZE];

static void
init_spu_disassemble (void)
{
  int i;

  /* If two instructions have the same opcode then we prefer the first
   * one.  In most cases it is just an alternate mnemonic. */
  for (i = 0; i < spu_num_opcodes; i++)
    {
      int o = spu_opcodes[i].opcode;
      if (o >= SPU_DISASM_TBL_SIZE)
	continue; /* abort (); */
      if (spu_disassemble_table[o] == 0)
	spu_disassemble_table[o] = &spu_opcodes[i];
    }
}

/* Determine the instruction from the 10 least significant bits. */
static const struct spu_opcode *
get_index_for_opcode (unsigned int insn)
{
  const struct spu_opcode *index;
  unsigned int opcode = insn >> (32-11);

  /* Init the table.  This assumes that element 0/opcode 0 (currently
   * NOP) is always used */
  if (spu_disassemble_table[0] == 0)
    init_spu_disassemble ();

  if ((index = spu_disassemble_table[opcode & 0x780]) != 0
      && index->insn_type == RRR)
    return index;

  if ((index = spu_disassemble_table[opcode & 0x7f0]) != 0
      && (index->insn_type == RI18 || index->insn_type == LBT))
    return index;

  if ((index = spu_disassemble_table[opcode & 0x7f8]) != 0
      && index->insn_type == RI10)
    return index;

  if ((index = spu_disassemble_table[opcode & 0x7fc]) != 0
      && (index->insn_type == RI16))
    return index;

  if ((index = spu_disassemble_table[opcode & 0x7fe]) != 0
      && (index->insn_type == RI8))
    return index;

  if ((index = spu_disassemble_table[opcode & 0x7ff]) != 0)
    return index;

  return NULL;
}

/* Print a Spu instruction.  */

int
print_insn_spu (unsigned long insn, unsigned long memaddr)
{
  int value;
  int hex_value;
  const struct spu_opcode *index;
  enum spu_insns tag;

  index = get_index_for_opcode (insn);

  if (index == 0)
    {
      printf(".long 0x%lx", insn);
    }
  else
    {
      int i;
      int paren = 0;
      tag = (enum spu_insns)(index - spu_opcodes);
      printf("%s", index->mnemonic);
      if (tag == M_BI || tag == M_BISL || tag == M_IRET || tag == M_BISLED
	  || tag == M_BIHNZ || tag == M_BIHZ || tag == M_BINZ || tag == M_BIZ
          || tag == M_SYNC || tag == M_HBR)
	{
	  int fb = (insn >> (32-18)) & 0x7f;
	  if (fb & 0x40)
	    printf(tag == M_SYNC ? "c" : "p");
	  if (fb & 0x20)
	    printf("d");
	  if (fb & 0x10)
	    printf("e");
	}
      if (index->arg[0] != 0)
	printf("\t");
      hex_value = 0;
      for (i = 1;  i <= index->arg[0]; i++)
	{
	  int arg = index->arg[i];
	  if (arg != A_P && !paren && i > 1)
	    printf(",");

	  switch (arg)
	    {
	    case A_T:
	      printf("$%lu",
				     DECODE_INSN_RT (insn));
	      break;
	    case A_A:
	      printf("$%lu",
				     DECODE_INSN_RA (insn));
	      break;
	    case A_B:
	      printf("$%lu",
				     DECODE_INSN_RB (insn));
	      break;
	    case A_C:
	      printf("$%lu",
				     DECODE_INSN_RC (insn));
	      break;
	    case A_S:
	      printf("$sp%lu",
				     DECODE_INSN_RA (insn));
	      break;
	    case A_H:
	      printf("$ch%lu",
				     DECODE_INSN_RA (insn));
	      break;
	    case A_P:
	      paren++;
	      printf("(");
	      break;
	    case A_U7A:
	      printf("%lu",
				     173 - DECODE_INSN_U8 (insn));
	      break;
	    case A_U7B:
	      printf("%lu",
				     155 - DECODE_INSN_U8 (insn));
	      break;
	    case A_S3:
	    case A_S6:
	    case A_S7:
	    case A_S7N:
	    case A_U3:
	    case A_U5:
	    case A_U6:
	    case A_U7:
	      hex_value = DECODE_INSN_I7 (insn);
	      printf("%d", hex_value);
	      break;
	    case A_S11:
	      print_address(memaddr + DECODE_INSN_I9a (insn) * 4);
	      break;
	    case A_S11I:
	      print_address(memaddr + DECODE_INSN_I9b (insn) * 4);
	      break;
	    case A_S10:
	    case A_S10B:
	      hex_value = DECODE_INSN_I10 (insn);
	      printf("%d", hex_value);
	      break;
	    case A_S14:
	      hex_value = DECODE_INSN_I10 (insn) * 16;
	      printf("%d", hex_value);
	      break;
	    case A_S16:
	      hex_value = DECODE_INSN_I16 (insn);
	      printf("%d", hex_value);
	      break;
	    case A_X16:
	      hex_value = DECODE_INSN_U16 (insn);
	      printf("%u", hex_value);
	      break;
	    case A_R18:
	      value = DECODE_INSN_I16 (insn) * 4;
	      if (value == 0)
		printf("%d", value);
	      else
		{
		  hex_value = memaddr + value;
		  print_address(hex_value & 0x3ffff);
		}
	      break;
	    case A_S18:
	      value = DECODE_INSN_U16 (insn) * 4;
	      if (value == 0)
		printf("%d", value);
	      else
		print_address(value);
	      break;
	    case A_U18:
	      value = DECODE_INSN_U18 (insn);
	      if (value == 0 || 1)
		{
		  hex_value = value;
		  printf("%u", value);
		}
	      else
		print_address(value);
	      break;
	    case A_U14:
	      hex_value = DECODE_INSN_U14 (insn);
	      printf("%u", hex_value);
	      break;
	    }
	  if (arg != A_P && paren)
	    {
	      printf(")");
	      paren--;
	    }
	}
      if (hex_value > 16)
	printf("\t# %x", hex_value);
    }
  return 4;
}
Commit	Line	Data
16216333	1	// SPDX-License-Identifier: GPL-2.0-or-later
ae06e374 ME	2	/* Disassemble SPU instructions
	3
	4	Copyright 2006 Free Software Foundation, Inc.
	5
	6	This file is part of GDB, GAS, and the GNU binutils.
	7
16216333	8	*/
ae06e374 ME	9
	10	#include <linux/string.h>
	11	#include "nonstdio.h"
	12	#include "ansidecl.h"
	13	#include "spu.h"
e0426047	14	#include "dis-asm.h"
ae06e374 ME	15
	16	/* This file provides a disassembler function which uses
	17	the disassembler interface defined in dis-asm.h. */
	18
	19	extern const struct spu_opcode spu_opcodes[];
	20	extern const int spu_num_opcodes;
	21
	22	#define SPU_DISASM_TBL_SIZE (1 << 11)
	23	static const struct spu_opcode *spu_disassemble_table[SPU_DISASM_TBL_SIZE];
	24
	25	static void
	26	init_spu_disassemble (void)
	27	{
	28	int i;
	29
	30	/* If two instructions have the same opcode then we prefer the first
	31	* one. In most cases it is just an alternate mnemonic. */
	32	for (i = 0; i < spu_num_opcodes; i++)
	33	{
	34	int o = spu_opcodes[i].opcode;
	35	if (o >= SPU_DISASM_TBL_SIZE)
	36	continue; /* abort (); */
	37	if (spu_disassemble_table[o] == 0)
	38	spu_disassemble_table[o] = &spu_opcodes[i];
	39	}
	40	}
	41
	42	/* Determine the instruction from the 10 least significant bits. */
	43	static const struct spu_opcode *
	44	get_index_for_opcode (unsigned int insn)
	45	{
	46	const struct spu_opcode *index;
	47	unsigned int opcode = insn >> (32-11);
	48
	49	/* Init the table. This assumes that element 0/opcode 0 (currently
	50	* NOP) is always used */
	51	if (spu_disassemble_table[0] == 0)
	52	init_spu_disassemble ();
	53
	54	if ((index = spu_disassemble_table[opcode & 0x780]) != 0
	55	&& index->insn_type == RRR)
	56	return index;
	57
	58	if ((index = spu_disassemble_table[opcode & 0x7f0]) != 0
	59	&& (index->insn_type == RI18 \|\| index->insn_type == LBT))
	60	return index;
	61
	62	if ((index = spu_disassemble_table[opcode & 0x7f8]) != 0
	63	&& index->insn_type == RI10)
	64	return index;
	65
	66	if ((index = spu_disassemble_table[opcode & 0x7fc]) != 0
	67	&& (index->insn_type == RI16))
	68	return index;
	69
	70	if ((index = spu_disassemble_table[opcode & 0x7fe]) != 0
	71	&& (index->insn_type == RI8))
	72	return index;
	73
	74	if ((index = spu_disassemble_table[opcode & 0x7ff]) != 0)
	75	return index;
	76
9340b0d3	77	return NULL;
ae06e374 ME	78	}
	79
	80	/* Print a Spu instruction. */
	81
	82	int
	83	print_insn_spu (unsigned long insn, unsigned long memaddr)
	84	{
	85	int value;
	86	int hex_value;
	87	const struct spu_opcode *index;
	88	enum spu_insns tag;
	89
	90	index = get_index_for_opcode (insn);
	91
	92	if (index == 0)
	93	{
e70d8f55	94	printf(".long 0x%lx", insn);
ae06e374 ME	95	}
	96	else
	97	{
	98	int i;
	99	int paren = 0;
	100	tag = (enum spu_insns)(index - spu_opcodes);
	101	printf("%s", index->mnemonic);
	102	if (tag == M_BI \|\| tag == M_BISL \|\| tag == M_IRET \|\| tag == M_BISLED
	103	\|\| tag == M_BIHNZ \|\| tag == M_BIHZ \|\| tag == M_BINZ \|\| tag == M_BIZ
	104	\|\| tag == M_SYNC \|\| tag == M_HBR)
	105	{
	106	int fb = (insn >> (32-18)) & 0x7f;
	107	if (fb & 0x40)
	108	printf(tag == M_SYNC ? "c" : "p");
	109	if (fb & 0x20)
	110	printf("d");
	111	if (fb & 0x10)
	112	printf("e");
	113	}
	114	if (index->arg[0] != 0)
	115	printf("\t");
	116	hex_value = 0;
	117	for (i = 1; i <= index->arg[0]; i++)
	118	{
	119	int arg = index->arg[i];
	120	if (arg != A_P && !paren && i > 1)
	121	printf(",");
	122
	123	switch (arg)
	124	{
	125	case A_T:
e70d8f55	126	printf("$%lu",
ae06e374 ME	127	DECODE_INSN_RT (insn));
	128	break;
	129	case A_A:
e70d8f55	130	printf("$%lu",
ae06e374 ME	131	DECODE_INSN_RA (insn));
	132	break;
	133	case A_B:
e70d8f55	134	printf("$%lu",
ae06e374 ME	135	DECODE_INSN_RB (insn));
	136	break;
	137	case A_C:
e70d8f55	138	printf("$%lu",
ae06e374 ME	139	DECODE_INSN_RC (insn));
	140	break;
	141	case A_S:
e70d8f55	142	printf("$sp%lu",
ae06e374 ME	143	DECODE_INSN_RA (insn));
	144	break;
	145	case A_H:
e70d8f55	146	printf("$ch%lu",
ae06e374 ME	147	DECODE_INSN_RA (insn));
	148	break;
	149	case A_P:
	150	paren++;
	151	printf("(");
	152	break;
	153	case A_U7A:
e70d8f55	154	printf("%lu",
ae06e374 ME	155	173 - DECODE_INSN_U8 (insn));
	156	break;
	157	case A_U7B:
e70d8f55	158	printf("%lu",
ae06e374 ME	159	155 - DECODE_INSN_U8 (insn));
	160	break;
	161	case A_S3:
	162	case A_S6:
	163	case A_S7:
	164	case A_S7N:
	165	case A_U3:
	166	case A_U5:
	167	case A_U6:
	168	case A_U7:
	169	hex_value = DECODE_INSN_I7 (insn);
	170	printf("%d", hex_value);
	171	break;
	172	case A_S11:
	173	print_address(memaddr + DECODE_INSN_I9a (insn) * 4);
	174	break;
	175	case A_S11I:
	176	print_address(memaddr + DECODE_INSN_I9b (insn) * 4);
	177	break;
	178	case A_S10:
	179	case A_S10B:
	180	hex_value = DECODE_INSN_I10 (insn);
	181	printf("%d", hex_value);
	182	break;
	183	case A_S14:
	184	hex_value = DECODE_INSN_I10 (insn) * 16;
	185	printf("%d", hex_value);
	186	break;
	187	case A_S16:
	188	hex_value = DECODE_INSN_I16 (insn);
	189	printf("%d", hex_value);
	190	break;
	191	case A_X16:
	192	hex_value = DECODE_INSN_U16 (insn);
	193	printf("%u", hex_value);
	194	break;
	195	case A_R18:
	196	value = DECODE_INSN_I16 (insn) * 4;
	197	if (value == 0)
	198	printf("%d", value);
	199	else
	200	{
	201	hex_value = memaddr + value;
	202	print_address(hex_value & 0x3ffff);
	203	}
	204	break;
	205	case A_S18:
	206	value = DECODE_INSN_U16 (insn) * 4;
	207	if (value == 0)
	208	printf("%d", value);
	209	else
	210	print_address(value);
	211	break;
	212	case A_U18:
	213	value = DECODE_INSN_U18 (insn);
	214	if (value == 0 \|\| 1)
	215	{
	216	hex_value = value;
	217	printf("%u", value);
	218	}
	219	else
	220	print_address(value);
	221	break;
	222	case A_U14:
223	hex_value = DECODE_INSN_U14 (insn);
224	printf("%u", hex_value);
225	break;
226	}
227	if (arg != A_P && paren)
228	{
229	printf(")");
230	paren--;
231	}
232	}
233	if (hex_value > 16)
234	printf("\t# %x", hex_value);
235	}
236	return 4;
237	}