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

/* Disassemble SPU instructions

   Copyright 2006 Free Software Foundation, Inc.

   This file is part of GDB, GAS, 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.,
   51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */

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

extern void print_address (unsigned long memaddr);

/* 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 0;
}

/* 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%x", 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("$%d",
				     DECODE_INSN_RT (insn));
	      break;
	    case A_A:
	      printf("$%d",
				     DECODE_INSN_RA (insn));
	      break;
	    case A_B:
	      printf("$%d",
				     DECODE_INSN_RB (insn));
	      break;
	    case A_C:
	      printf("$%d",
				     DECODE_INSN_RC (insn));
	      break;
	    case A_S:
	      printf("$sp%d",
				     DECODE_INSN_RA (insn));
	      break;
	    case A_H:
	      printf("$ch%d",
				     DECODE_INSN_RA (insn));
	      break;
	    case A_P:
	      paren++;
	      printf("(");
	      break;
	    case A_U7A:
	      printf("%d",
				     173 - DECODE_INSN_U8 (insn));
	      break;
	    case A_U7B:
	      printf("%d",
				     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
ae06e374 ME	1	/* Disassemble SPU instructions
	2
	3	Copyright 2006 Free Software Foundation, Inc.
	4
	5	This file is part of GDB, GAS, 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 along
	18	with this program; if not, write to the Free Software Foundation, Inc.,
	19	51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
	20
	21	#include <linux/string.h>
	22	#include "nonstdio.h"
	23	#include "ansidecl.h"
	24	#include "spu.h"
	25
	26	extern void print_address (unsigned long memaddr);
	27
	28	/* This file provides a disassembler function which uses
	29	the disassembler interface defined in dis-asm.h. */
	30
	31	extern const struct spu_opcode spu_opcodes[];
	32	extern const int spu_num_opcodes;
	33
	34	#define SPU_DISASM_TBL_SIZE (1 << 11)
	35	static const struct spu_opcode *spu_disassemble_table[SPU_DISASM_TBL_SIZE];
	36
	37	static void
	38	init_spu_disassemble (void)
	39	{
	40	int i;
	41
	42	/* If two instructions have the same opcode then we prefer the first
	43	* one. In most cases it is just an alternate mnemonic. */
	44	for (i = 0; i < spu_num_opcodes; i++)
	45	{
	46	int o = spu_opcodes[i].opcode;
	47	if (o >= SPU_DISASM_TBL_SIZE)
	48	continue; /* abort (); */
	49	if (spu_disassemble_table[o] == 0)
	50	spu_disassemble_table[o] = &spu_opcodes[i];
	51	}
	52	}
	53
	54	/* Determine the instruction from the 10 least significant bits. */
	55	static const struct spu_opcode *
	56	get_index_for_opcode (unsigned int insn)
	57	{
	58	const struct spu_opcode *index;
	59	unsigned int opcode = insn >> (32-11);
	60
	61	/* Init the table. This assumes that element 0/opcode 0 (currently
	62	* NOP) is always used */
	63	if (spu_disassemble_table[0] == 0)
	64	init_spu_disassemble ();
65
66	if ((index = spu_disassemble_table[opcode & 0x780]) != 0
67	&& index->insn_type == RRR)
68	return index;
69
70	if ((index = spu_disassemble_table[opcode & 0x7f0]) != 0
71	&& (index->insn_type == RI18 \|\| index->insn_type == LBT))
72	return index;
73
74	if ((index = spu_disassemble_table[opcode & 0x7f8]) != 0
75	&& index->insn_type == RI10)
76	return index;
77
78	if ((index = spu_disassemble_table[opcode & 0x7fc]) != 0
79	&& (index->insn_type == RI16))
80	return index;
81
82	if ((index = spu_disassemble_table[opcode & 0x7fe]) != 0
83	&& (index->insn_type == RI8))
84	return index;
85
86	if ((index = spu_disassemble_table[opcode & 0x7ff]) != 0)
87	return index;
88
89	return 0;
90	}
91
92	/* Print a Spu instruction. */
93
94	int
95	print_insn_spu (unsigned long insn, unsigned long memaddr)
96	{
97	int value;
98	int hex_value;
99	const struct spu_opcode *index;
100	enum spu_insns tag;
101
102	index = get_index_for_opcode (insn);
103
104	if (index == 0)
105	{
106	printf(".long 0x%x", insn);
107	}
108	else
109	{
110	int i;
111	int paren = 0;
112	tag = (enum spu_insns)(index - spu_opcodes);
113	printf("%s", index->mnemonic);
114	if (tag == M_BI \|\| tag == M_BISL \|\| tag == M_IRET \|\| tag == M_BISLED
115	\|\| tag == M_BIHNZ \|\| tag == M_BIHZ \|\| tag == M_BINZ \|\| tag == M_BIZ
116	\|\| tag == M_SYNC \|\| tag == M_HBR)
117	{
118	int fb = (insn >> (32-18)) & 0x7f;
119	if (fb & 0x40)
120	printf(tag == M_SYNC ? "c" : "p");
121	if (fb & 0x20)
122	printf("d");
123	if (fb & 0x10)
124	printf("e");
125	}
126	if (index->arg[0] != 0)
127	printf("\t");
128	hex_value = 0;
129	for (i = 1; i <= index->arg[0]; i++)
130	{
131	int arg = index->arg[i];
132	if (arg != A_P && !paren && i > 1)
133	printf(",");
134
135	switch (arg)
136	{
137	case A_T:
138	printf("$%d",
139	DECODE_INSN_RT (insn));
140	break;
141	case A_A:
142	printf("$%d",
143	DECODE_INSN_RA (insn));
144	break;
145	case A_B:
146	printf("$%d",
147	DECODE_INSN_RB (insn));
148	break;
149	case A_C:
150	printf("$%d",
151	DECODE_INSN_RC (insn));
152	break;
153	case A_S:
154	printf("$sp%d",
155	DECODE_INSN_RA (insn));
156	break;
157	case A_H:
158	printf("$ch%d",
159	DECODE_INSN_RA (insn));
160	break;
161	case A_P:
162	paren++;
163	printf("(");
164	break;
165	case A_U7A:
166	printf("%d",
167	173 - DECODE_INSN_U8 (insn));
168	break;
169	case A_U7B:
170	printf("%d",
171	155 - DECODE_INSN_U8 (insn));
172	break;
173	case A_S3:
174	case A_S6:
175	case A_S7:
176	case A_S7N:
177	case A_U3:
178	case A_U5:
179	case A_U6:
180	case A_U7:
181	hex_value = DECODE_INSN_I7 (insn);
182	printf("%d", hex_value);
183	break;
184	case A_S11:
185	print_address(memaddr + DECODE_INSN_I9a (insn) * 4);
186	break;
187	case A_S11I:
188	print_address(memaddr + DECODE_INSN_I9b (insn) * 4);
189	break;
190	case A_S10:
191	case A_S10B:
192	hex_value = DECODE_INSN_I10 (insn);
193	printf("%d", hex_value);
194	break;
195	case A_S14:
196	hex_value = DECODE_INSN_I10 (insn) * 16;
197	printf("%d", hex_value);
198	break;
199	case A_S16:
200	hex_value = DECODE_INSN_I16 (insn);
201	printf("%d", hex_value);
202	break;
203	case A_X16:
204	hex_value = DECODE_INSN_U16 (insn);
205	printf("%u", hex_value);
206	break;
207	case A_R18:
208	value = DECODE_INSN_I16 (insn) * 4;
209	if (value == 0)
210	printf("%d", value);
211	else
212	{
213	hex_value = memaddr + value;
214	print_address(hex_value & 0x3ffff);
215	}
216	break;
217	case A_S18:
218	value = DECODE_INSN_U16 (insn) * 4;
219	if (value == 0)
220	printf("%d", value);
221	else
222	print_address(value);
223	break;
224	case A_U18:
225	value = DECODE_INSN_U18 (insn);
226	if (value == 0 \|\| 1)
227	{
228	hex_value = value;
229	printf("%u", value);
230	}
231	else
232	print_address(value);
233	break;
234	case A_U14:
235	hex_value = DECODE_INSN_U14 (insn);
236	printf("%u", hex_value);
237	break;
238	}
239	if (arg != A_P && paren)
240	{
241	printf(")");
242	paren--;
243	}
244	}
245	if (hex_value > 16)
246	printf("\t# %x", hex_value);
247	}
248	return 4;
249	}