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[/] [openrisc/] [trunk/] [gnu-stable/] [binutils-2.20.1/] [opcodes/] [microblaze-dis.c] - Blame information for rev 853

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/* Disassemble Xilinx microblaze instructions.
 
   Copyright 2009 Free Software Foundation, Inc.
 
   This file is part of the GNU opcodes library.
 
   This library 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 3, or (at your option)
   any later version.
 
   It 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 file; see the file COPYING.  If not, write to the
   Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */
 
 
#include "sysdep.h"
#define STATIC_TABLE
#define DEFINE_TABLE
 
#include "microblaze-opc.h"
#include "dis-asm.h"
#include <strings.h>
 
#define get_field_rd(instr)        get_field (instr, RD_MASK, RD_LOW)
#define get_field_r1(instr)        get_field (instr, RA_MASK, RA_LOW)
#define get_field_r2(instr)        get_field (instr, RB_MASK, RB_LOW)
#define get_int_field_imm(instr)   ((instr & IMM_MASK) >> IMM_LOW)
#define get_int_field_r1(instr)    ((instr & RA_MASK) >> RA_LOW)
 
static char *
get_field (long instr, long mask, unsigned short low)
{
  char tmpstr[25];
 
  sprintf (tmpstr, "%s%d", register_prefix, (int)((instr & mask) >> low));
  return (strdup (tmpstr));
}
 
static char *
get_field_imm (long instr)
{
  char tmpstr[25];
 
  sprintf (tmpstr, "%d", (short)((instr & IMM_MASK) >> IMM_LOW));
  return (strdup (tmpstr));
}
 
static char *
get_field_imm5 (long instr)
{
  char tmpstr[25];
 
  sprintf (tmpstr, "%d", (short)((instr & IMM5_MASK) >> IMM_LOW));
  return (strdup (tmpstr));
}
 
static char *
get_field_rfsl (long instr)
{
  char tmpstr[25];
 
  sprintf (tmpstr, "%s%d", fsl_register_prefix,
           (short)((instr & RFSL_MASK) >> IMM_LOW));
  return (strdup (tmpstr));
}
 
static char *
get_field_imm15 (long instr)
{
  char tmpstr[25];
 
  sprintf (tmpstr, "%d", (short)((instr & IMM15_MASK) >> IMM_LOW));
  return (strdup (tmpstr));
}
 
static char *
get_field_special (long instr, struct op_code_struct * op)
{
  char tmpstr[25];
  char spr[6];
 
  switch ((((instr & IMM_MASK) >> IMM_LOW) ^ op->immval_mask))
    {
    case REG_MSR_MASK :
      strcpy (spr, "msr");
      break;
    case REG_PC_MASK :
      strcpy (spr, "pc");
      break;
    case REG_EAR_MASK :
      strcpy (spr, "ear");
      break;
    case REG_ESR_MASK :
      strcpy (spr, "esr");
      break;
    case REG_FSR_MASK :
      strcpy (spr, "fsr");
      break;
    case REG_BTR_MASK :
      strcpy (spr, "btr");
      break;
    case REG_EDR_MASK :
      strcpy (spr, "edr");
      break;
    case REG_PID_MASK :
      strcpy (spr, "pid");
      break;
    case REG_ZPR_MASK :
      strcpy (spr, "zpr");
      break;
    case REG_TLBX_MASK :
      strcpy (spr, "tlbx");
      break;
    case REG_TLBLO_MASK :
      strcpy (spr, "tlblo");
      break;
    case REG_TLBHI_MASK :
      strcpy (spr, "tlbhi");
      break;
    case REG_TLBSX_MASK :
      strcpy (spr, "tlbsx");
      break;
    default :
      if (((((instr & IMM_MASK) >> IMM_LOW) ^ op->immval_mask) & 0xE000)
          == REG_PVR_MASK)
        {
          sprintf (tmpstr, "%spvr%d", register_prefix,
                   (unsigned short)(((instr & IMM_MASK) >> IMM_LOW)
                                    ^ op->immval_mask) ^ REG_PVR_MASK);
          return (strdup (tmpstr));
        }
      else
        strcpy (spr, "pc");
      break;
    }
 
   sprintf (tmpstr, "%s%s", register_prefix, spr);
   return (strdup (tmpstr));
}
 
static unsigned long
read_insn_microblaze (bfd_vma memaddr,
                      struct disassemble_info *info,
                      struct op_code_struct **opr)
{
  unsigned char       ibytes[4];
  int                 status;
  struct op_code_struct * op;
  unsigned long inst;
 
  status = info->read_memory_func (memaddr, ibytes, 4, info);
 
  if (status != 0)
    {
      info->memory_error_func (status, memaddr, info);
      return 0;
    }
 
  if (info->endian == BFD_ENDIAN_BIG)
    inst = (ibytes[0] << 24) | (ibytes[1] << 16) | (ibytes[2] << 8) | ibytes[3];
  else if (info->endian == BFD_ENDIAN_LITTLE)
    inst = (ibytes[3] << 24) | (ibytes[2] << 16) | (ibytes[1] << 8) | ibytes[0];
  else
    abort ();
 
  /* Just a linear search of the table.  */
  for (op = opcodes; op->name != 0; op ++)
    if (op->bit_sequence == (inst & op->opcode_mask))
      break;
 
  *opr = op;
  return inst;
}
 
 
int
print_insn_microblaze (bfd_vma memaddr, struct disassemble_info * info)
{
  fprintf_ftype       fprintf = info->fprintf_func;
  void *              stream = info->stream;
  unsigned long       inst, prev_inst;
  struct op_code_struct * op, *pop;
  int                 immval = 0;
  bfd_boolean         immfound = FALSE;
  static bfd_vma      prev_insn_addr = -1; /* Init the prev insn addr.  */
  static int          prev_insn_vma = -1;  /* Init the prev insn vma.  */
  int                 curr_insn_vma = info->buffer_vma;
 
  info->bytes_per_chunk = 4;
 
  inst = read_insn_microblaze (memaddr, info, &op);
  if (inst == 0)
    return -1;
 
  if (prev_insn_vma == curr_insn_vma)
    {
      if (memaddr-(info->bytes_per_chunk) == prev_insn_addr)
        {
          prev_inst = read_insn_microblaze (prev_insn_addr, info, &pop);
          if (prev_inst == 0)
            return -1;
          if (pop->instr == imm)
            {
              immval = (get_int_field_imm (prev_inst) << 16) & 0xffff0000;
              immfound = TRUE;
            }
          else
            {
              immval = 0;
              immfound = FALSE;
            }
        }
    }
 
  /* Make curr insn as prev insn.  */
  prev_insn_addr = memaddr;
  prev_insn_vma = curr_insn_vma;
 
  if (op->name == NULL)
    fprintf (stream, ".short 0x%04x", inst);
  else
    {
      fprintf (stream, "%s", op->name);
 
      switch (op->inst_type)
        {
        case INST_TYPE_RD_R1_R2:
          fprintf (stream, "\t%s, %s, %s", get_field_rd (inst),
                   get_field_r1(inst), get_field_r2 (inst));
          break;
        case INST_TYPE_RD_R1_IMM:
          fprintf (stream, "\t%s, %s, %s", get_field_rd (inst),
                   get_field_r1(inst), get_field_imm (inst));
          if (info->print_address_func && get_int_field_r1 (inst) == 0
              && info->symbol_at_address_func)
            {
              if (immfound)
                immval |= (get_int_field_imm (inst) & 0x0000ffff);
              else
                {
                  immval = get_int_field_imm (inst);
                  if (immval & 0x8000)
                    immval |= 0xFFFF0000;
                }
              if (immval > 0 && info->symbol_at_address_func (immval, info))
                {
                  fprintf (stream, "\t// ");
                  info->print_address_func (immval, info);
                }
            }
          break;
        case INST_TYPE_RD_R1_IMM5:
          fprintf (stream, "\t%s, %s, %s", get_field_rd (inst),
                   get_field_r1(inst), get_field_imm5 (inst));
          break;
        case INST_TYPE_RD_RFSL:
          fprintf (stream, "\t%s, %s", get_field_rd (inst), get_field_rfsl (inst));
          break;
        case INST_TYPE_R1_RFSL:
          fprintf (stream, "\t%s, %s", get_field_r1 (inst), get_field_rfsl (inst));
          break;
        case INST_TYPE_RD_SPECIAL:
          fprintf (stream, "\t%s, %s", get_field_rd (inst),
                   get_field_special (inst, op));
          break;
        case INST_TYPE_SPECIAL_R1:
          fprintf (stream, "\t%s, %s", get_field_special (inst, op),
                   get_field_r1(inst));
          break;
        case INST_TYPE_RD_R1:
          fprintf (stream, "\t%s, %s", get_field_rd (inst), get_field_r1 (inst));
          break;
        case INST_TYPE_R1_R2:
          fprintf (stream, "\t%s, %s", get_field_r1 (inst), get_field_r2 (inst));
          break;
        case INST_TYPE_R1_IMM:
          fprintf (stream, "\t%s, %s", get_field_r1 (inst), get_field_imm (inst));
          /* The non-pc relative instructions are returns, which shouldn't
             have a label printed.  */
          if (info->print_address_func && op->inst_offset_type == INST_PC_OFFSET
              && info->symbol_at_address_func)
            {
              if (immfound)
                immval |= (get_int_field_imm (inst) & 0x0000ffff);
              else
                {
                  immval = get_int_field_imm (inst);
                  if (immval & 0x8000)
                    immval |= 0xFFFF0000;
                }
              immval += memaddr;
              if (immval > 0 && info->symbol_at_address_func (immval, info))
                {
                  fprintf (stream, "\t// ");
                  info->print_address_func (immval, info);
                }
              else
                {
                  fprintf (stream, "\t\t// ");
                  fprintf (stream, "%x", immval);
                }
            }
          break;
        case INST_TYPE_RD_IMM:
          fprintf (stream, "\t%s, %s", get_field_rd (inst), get_field_imm (inst));
          if (info->print_address_func && info->symbol_at_address_func)
            {
            if (immfound)
              immval |= (get_int_field_imm (inst) & 0x0000ffff);
            else
              {
                immval = get_int_field_imm (inst);
                if (immval & 0x8000)
                  immval |= 0xFFFF0000;
              }
            if (op->inst_offset_type == INST_PC_OFFSET)
              immval += (int) memaddr;
            if (info->symbol_at_address_func (immval, info))
              {
                fprintf (stream, "\t// ");
                info->print_address_func (immval, info);
              }
            }
          break;
        case INST_TYPE_IMM:
          fprintf (stream, "\t%s", get_field_imm (inst));
          if (info->print_address_func && info->symbol_at_address_func
              && op->instr != imm)
            {
              if (immfound)
                immval |= (get_int_field_imm (inst) & 0x0000ffff);
              else
                {
                  immval = get_int_field_imm (inst);
                  if (immval & 0x8000)
                    immval |= 0xFFFF0000;
                }
              if (op->inst_offset_type == INST_PC_OFFSET)
                immval += (int) memaddr;
              if (immval > 0 && info->symbol_at_address_func (immval, info))
                {
                  fprintf (stream, "\t// ");
                  info->print_address_func (immval, info);
                }
              else if (op->inst_offset_type == INST_PC_OFFSET)
                {
                  fprintf (stream, "\t\t// ");
                  fprintf (stream, "%x", immval);
                }
            }
          break;
        case INST_TYPE_RD_R2:
          fprintf (stream, "\t%s, %s", get_field_rd (inst), get_field_r2 (inst));
          break;
        case INST_TYPE_R2:
          fprintf (stream, "\t%s", get_field_r2 (inst));
          break;
        case INST_TYPE_R1:
          fprintf (stream, "\t%s", get_field_r1 (inst));
          break;
        case INST_TYPE_RD_R1_SPECIAL:
          fprintf (stream, "\t%s, %s", get_field_rd (inst), get_field_r2 (inst));
          break;
        case INST_TYPE_RD_IMM15:
          fprintf (stream, "\t%s, %s", get_field_rd (inst), get_field_imm15 (inst));
          break;
        /* For tuqula instruction */
        case INST_TYPE_RD:
          fprintf (stream, "\t%s", get_field_rd (inst));
          break;
        case INST_TYPE_RFSL:
          fprintf (stream, "\t%s", get_field_rfsl (inst));
          break;
        default:
          /* If the disassembler lags the instruction set.  */
          fprintf (stream, "\tundecoded operands, inst is 0x%04x", inst);
          break;
        }
    }
 
  /* Say how many bytes we consumed.  */
  return 4;
}
#if 0
static enum microblaze_instr
get_insn_microblaze (long inst,
                     bfd_boolean *isunsignedimm,
                     enum microblaze_instr_type *insn_type,
                     short *delay_slots)
{
  struct op_code_struct * op;
  *isunsignedimm = FALSE;
 
  /* Just a linear search of the table.  */
  for (op = opcodes; op->name != 0; op ++)
    if (op->bit_sequence == (inst & op->opcode_mask))
      break;
 
  if (op->name == 0)
    return invalid_inst;
  else
    {
      *isunsignedimm = (op->inst_type == INST_TYPE_RD_R1_UNSIGNED_IMM);
      *insn_type = op->instr_type;
      *delay_slots = op->delay_slots;
      return op->instr;
    }
}
 
short
get_delay_slots_microblaze (long inst)
{
  bfd_boolean isunsignedimm;
  enum microblaze_instr_type insn_type;
  enum microblaze_instr op;
  short delay_slots;
 
  op = get_insn_microblaze (inst, &isunsignedimm, &insn_type, &delay_slots);
  if (op == invalid_inst)
    return 0;
  else
    return delay_slots;
}
 
enum microblaze_instr
microblaze_decode_insn (long insn, int *rd, int *ra, int *rb, int *imm)
{
  enum microblaze_instr op;
  bfd_boolean t1;
  enum microblaze_instr_type t2;
  short t3;
 
  op = get_insn_microblaze (insn, &t1, &t2, &t3);
  *rd = (insn & RD_MASK) >> RD_LOW;
  *ra = (insn & RA_MASK) >> RA_LOW;
  *rb = (insn & RB_MASK) >> RB_LOW;
  t3 = (insn & IMM_MASK) >> IMM_LOW;
  *imm = (int) t3;
  return (op);
}
 
unsigned long
microblaze_get_target_address (long inst, bfd_boolean immfound, int immval,
                               long pcval, long r1val, long r2val,
                               bfd_boolean *targetvalid,
                               bfd_boolean *unconditionalbranch)
{
  struct op_code_struct * op;
  long targetaddr = 0;
 
  *unconditionalbranch = FALSE;
  /* Just a linear search of the table.  */
  for (op = opcodes; op->name != 0; op ++)
    if (op->bit_sequence == (inst & op->opcode_mask))
      break;
 
  if (op->name == 0)
    {
      *targetvalid = FALSE;
    }
  else if (op->instr_type == branch_inst)
    {
      switch (op->inst_type)
        {
        case INST_TYPE_R2:
          *unconditionalbranch = TRUE;
        /* Fall through.  */
        case INST_TYPE_RD_R2:
        case INST_TYPE_R1_R2:
          targetaddr = r2val;
          *targetvalid = TRUE;
          if (op->inst_offset_type == INST_PC_OFFSET)
            targetaddr += pcval;
          break;
        case INST_TYPE_IMM:
          *unconditionalbranch = TRUE;
        /* Fall through.  */
        case INST_TYPE_RD_IMM:
        case INST_TYPE_R1_IMM:
          if (immfound)
            {
              targetaddr = (immval << 16) & 0xffff0000;
              targetaddr |= (get_int_field_imm (inst) & 0x0000ffff);
            }
          else
            {
              targetaddr = get_int_field_imm (inst);
              if (targetaddr & 0x8000)
                targetaddr |= 0xFFFF0000;
            }
          if (op->inst_offset_type == INST_PC_OFFSET)
            targetaddr += pcval;
          *targetvalid = TRUE;
          break;
        default:
          *targetvalid = FALSE;
          break;
        }
    }
  else if (op->instr_type == return_inst)
    {
      if (immfound)
        {
          targetaddr = (immval << 16) & 0xffff0000;
          targetaddr |= (get_int_field_imm (inst) & 0x0000ffff);
        }
      else
        {
          targetaddr = get_int_field_imm (inst);
          if (targetaddr & 0x8000)
            targetaddr |= 0xFFFF0000;
        }
      targetaddr += r1val;
      *targetvalid = TRUE;
    }
  else
    *targetvalid = FALSE;
  return targetaddr;
}
#endif

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[/] [openrisc/] [trunk/] [gnu-stable/] [binutils-2.20.1/] [opcodes/] [microblaze-dis.c] - Blame information for rev 853

Line No.	Rev	Author	Line
1	205	julius	`/* Disassemble Xilinx microblaze instructions.`
2
3			`Copyright 2009 Free Software Foundation, Inc.`
4
5			`This file is part of the GNU opcodes library.`
6
7			`This library 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 3, or (at your option)`
10			`any later version.`
11
12			`It is distributed in the hope that it will be useful, but WITHOUT`
13			`ANY WARRANTY; without even the implied warranty of MERCHANTABILITY`
14			`or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public`
15			`License for more details.`
16
17			`You should have received a copy of the GNU General Public License`
18			`along with this file; see the file COPYING. If not, write to the`
19			`Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,`
20			`MA 02110-1301, USA. */`
21
22
23			`#include "sysdep.h"`
24			`#define STATIC_TABLE`
25			`#define DEFINE_TABLE`
26
27			`#include "microblaze-opc.h"`
28			`#include "dis-asm.h"`
29			`#include <strings.h>`
30
31			`#define get_field_rd(instr) get_field (instr, RD_MASK, RD_LOW)`
32			`#define get_field_r1(instr) get_field (instr, RA_MASK, RA_LOW)`
33			`#define get_field_r2(instr) get_field (instr, RB_MASK, RB_LOW)`
34			`#define get_int_field_imm(instr) ((instr & IMM_MASK) >> IMM_LOW)`
35			`#define get_int_field_r1(instr) ((instr & RA_MASK) >> RA_LOW)`
36
37			`static char *`
38			`get_field (long instr, long mask, unsigned short low)`
39			`{`
40			`char tmpstr[25];`
41
42			`sprintf (tmpstr, "%s%d", register_prefix, (int)((instr & mask) >> low));`
43			`return (strdup (tmpstr));`
44			`}`
45
46			`static char *`
47			`get_field_imm (long instr)`
48			`{`
49			`char tmpstr[25];`
50
51			`sprintf (tmpstr, "%d", (short)((instr & IMM_MASK) >> IMM_LOW));`
52			`return (strdup (tmpstr));`
53			`}`
54
55			`static char *`
56			`get_field_imm5 (long instr)`
57			`{`
58			`char tmpstr[25];`
59
60			`sprintf (tmpstr, "%d", (short)((instr & IMM5_MASK) >> IMM_LOW));`
61			`return (strdup (tmpstr));`
62			`}`
63
64			`static char *`
65			`get_field_rfsl (long instr)`
66			`{`
67			`char tmpstr[25];`
68
69			`sprintf (tmpstr, "%s%d", fsl_register_prefix,`
70			`(short)((instr & RFSL_MASK) >> IMM_LOW));`
71			`return (strdup (tmpstr));`
72			`}`
73
74			`static char *`
75			`get_field_imm15 (long instr)`
76			`{`
77			`char tmpstr[25];`
78
79			`sprintf (tmpstr, "%d", (short)((instr & IMM15_MASK) >> IMM_LOW));`
80			`return (strdup (tmpstr));`
81			`}`
82
83			`static char *`
84			`get_field_special (long instr, struct op_code_struct * op)`
85			`{`
86			`char tmpstr[25];`
87			`char spr[6];`
88
89			`switch ((((instr & IMM_MASK) >> IMM_LOW) ^ op->immval_mask))`
90			`{`
91			`case REG_MSR_MASK :`
92			`strcpy (spr, "msr");`
93			`break;`
94			`case REG_PC_MASK :`
95			`strcpy (spr, "pc");`
96			`break;`
97			`case REG_EAR_MASK :`
98			`strcpy (spr, "ear");`
99			`break;`
100			`case REG_ESR_MASK :`
101			`strcpy (spr, "esr");`
102			`break;`
103			`case REG_FSR_MASK :`
104			`strcpy (spr, "fsr");`
105			`break;`
106			`case REG_BTR_MASK :`
107			`strcpy (spr, "btr");`
108			`break;`
109			`case REG_EDR_MASK :`
110			`strcpy (spr, "edr");`
111			`break;`
112			`case REG_PID_MASK :`
113			`strcpy (spr, "pid");`
114			`break;`
115			`case REG_ZPR_MASK :`
116			`strcpy (spr, "zpr");`
117			`break;`
118			`case REG_TLBX_MASK :`
119			`strcpy (spr, "tlbx");`
120			`break;`
121			`case REG_TLBLO_MASK :`
122			`strcpy (spr, "tlblo");`
123			`break;`
124			`case REG_TLBHI_MASK :`
125			`strcpy (spr, "tlbhi");`
126			`break;`
127			`case REG_TLBSX_MASK :`
128			`strcpy (spr, "tlbsx");`
129			`break;`
130			`default :`
131			`if (((((instr & IMM_MASK) >> IMM_LOW) ^ op->immval_mask) & 0xE000)`
132			`== REG_PVR_MASK)`
133			`{`
134			`sprintf (tmpstr, "%spvr%d", register_prefix,`
135			`(unsigned short)(((instr & IMM_MASK) >> IMM_LOW)`
136			`^ op->immval_mask) ^ REG_PVR_MASK);`
137			`return (strdup (tmpstr));`
138			`}`
139			`else`
140			`strcpy (spr, "pc");`
141			`break;`
142			`}`
143
144			`sprintf (tmpstr, "%s%s", register_prefix, spr);`
145			`return (strdup (tmpstr));`
146			`}`
147
148			`static unsigned long`
149			`read_insn_microblaze (bfd_vma memaddr,`
150			`struct disassemble_info *info,`
151			`struct op_code_struct **opr)`
152			`{`
153			`unsigned char ibytes[4];`
154			`int status;`
155			`struct op_code_struct * op;`
156			`unsigned long inst;`
157
158			`status = info->read_memory_func (memaddr, ibytes, 4, info);`
159
160			`if (status != 0)`
161			`{`
162			`info->memory_error_func (status, memaddr, info);`
163			`return 0;`
164			`}`
165
166			`if (info->endian == BFD_ENDIAN_BIG)`
167			`inst = (ibytes[0] << 24) \| (ibytes[1] << 16) \| (ibytes[2] << 8) \| ibytes[3];`
168			`else if (info->endian == BFD_ENDIAN_LITTLE)`
169			`inst = (ibytes[3] << 24) \| (ibytes[2] << 16) \| (ibytes[1] << 8) \| ibytes[0];`
170			`else`
171			`abort ();`
172
173			`/* Just a linear search of the table. */`
174			`for (op = opcodes; op->name != 0; op ++)`
175			`if (op->bit_sequence == (inst & op->opcode_mask))`
176			`break;`
177
178			`*opr = op;`
179			`return inst;`
180			`}`
181
182
183			`int`
184			`print_insn_microblaze (bfd_vma memaddr, struct disassemble_info * info)`
185			`{`
186			`fprintf_ftype fprintf = info->fprintf_func;`
187			`void * stream = info->stream;`
188			`unsigned long inst, prev_inst;`
189			`struct op_code_struct * op, *pop;`
190			`int immval = 0;`
191			`bfd_boolean immfound = FALSE;`
192			`static bfd_vma prev_insn_addr = -1; /* Init the prev insn addr. */`
193			`static int prev_insn_vma = -1; /* Init the prev insn vma. */`
194			`int curr_insn_vma = info->buffer_vma;`
195
196			`info->bytes_per_chunk = 4;`
197
198			`inst = read_insn_microblaze (memaddr, info, &op);`
199			`if (inst == 0)`
200			`return -1;`
201
202			`if (prev_insn_vma == curr_insn_vma)`
203			`{`
204			`if (memaddr-(info->bytes_per_chunk) == prev_insn_addr)`
205			`{`
206			`prev_inst = read_insn_microblaze (prev_insn_addr, info, &pop);`
207			`if (prev_inst == 0)`
208			`return -1;`
209			`if (pop->instr == imm)`
210			`{`
211			`immval = (get_int_field_imm (prev_inst) << 16) & 0xffff0000;`
212			`immfound = TRUE;`
213			`}`
214			`else`
215			`{`
216			`immval = 0;`
217			`immfound = FALSE;`
218			`}`
219			`}`
220			`}`
221
222			`/* Make curr insn as prev insn. */`
223			`prev_insn_addr = memaddr;`
224			`prev_insn_vma = curr_insn_vma;`
225
226			`if (op->name == NULL)`
227			`fprintf (stream, ".short 0x%04x", inst);`
228			`else`
229			`{`
230			`fprintf (stream, "%s", op->name);`
231
232			`switch (op->inst_type)`
233			`{`
234			`case INST_TYPE_RD_R1_R2:`
235			`fprintf (stream, "\t%s, %s, %s", get_field_rd (inst),`
236			`get_field_r1(inst), get_field_r2 (inst));`
237			`break;`
238			`case INST_TYPE_RD_R1_IMM:`
239			`fprintf (stream, "\t%s, %s, %s", get_field_rd (inst),`
240			`get_field_r1(inst), get_field_imm (inst));`
241			`if (info->print_address_func && get_int_field_r1 (inst) == 0`
242			`&& info->symbol_at_address_func)`
243			`{`
244			`if (immfound)`
245			`immval \|= (get_int_field_imm (inst) & 0x0000ffff);`
246			`else`
247			`{`
248			`immval = get_int_field_imm (inst);`
249			`if (immval & 0x8000)`
250			`immval \|= 0xFFFF0000;`
251			`}`
252			`if (immval > 0 && info->symbol_at_address_func (immval, info))`
253			`{`
254			`fprintf (stream, "\t// ");`
255			`info->print_address_func (immval, info);`
256			`}`
257			`}`
258			`break;`
259			`case INST_TYPE_RD_R1_IMM5:`
260			`fprintf (stream, "\t%s, %s, %s", get_field_rd (inst),`
261			`get_field_r1(inst), get_field_imm5 (inst));`
262			`break;`
263			`case INST_TYPE_RD_RFSL:`
264			`fprintf (stream, "\t%s, %s", get_field_rd (inst), get_field_rfsl (inst));`
265			`break;`
266			`case INST_TYPE_R1_RFSL:`
267			`fprintf (stream, "\t%s, %s", get_field_r1 (inst), get_field_rfsl (inst));`
268			`break;`
269			`case INST_TYPE_RD_SPECIAL:`
270			`fprintf (stream, "\t%s, %s", get_field_rd (inst),`
271			`get_field_special (inst, op));`
272			`break;`
273			`case INST_TYPE_SPECIAL_R1:`
274			`fprintf (stream, "\t%s, %s", get_field_special (inst, op),`
275			`get_field_r1(inst));`
276			`break;`
277			`case INST_TYPE_RD_R1:`
278			`fprintf (stream, "\t%s, %s", get_field_rd (inst), get_field_r1 (inst));`
279			`break;`
280			`case INST_TYPE_R1_R2:`
281			`fprintf (stream, "\t%s, %s", get_field_r1 (inst), get_field_r2 (inst));`
282			`break;`
283			`case INST_TYPE_R1_IMM:`
284			`fprintf (stream, "\t%s, %s", get_field_r1 (inst), get_field_imm (inst));`
285			`/* The non-pc relative instructions are returns, which shouldn't`
286			`have a label printed. */`
287			`if (info->print_address_func && op->inst_offset_type == INST_PC_OFFSET`
288			`&& info->symbol_at_address_func)`
289			`{`
290			`if (immfound)`
291			`immval \|= (get_int_field_imm (inst) & 0x0000ffff);`
292			`else`
293			`{`
294			`immval = get_int_field_imm (inst);`
295			`if (immval & 0x8000)`
296			`immval \|= 0xFFFF0000;`
297			`}`
298			`immval += memaddr;`
299			`if (immval > 0 && info->symbol_at_address_func (immval, info))`
300			`{`
301			`fprintf (stream, "\t// ");`
302			`info->print_address_func (immval, info);`
303			`}`
304			`else`
305			`{`
306			`fprintf (stream, "\t\t// ");`
307			`fprintf (stream, "%x", immval);`
308			`}`
309			`}`
310			`break;`
311			`case INST_TYPE_RD_IMM:`
312			`fprintf (stream, "\t%s, %s", get_field_rd (inst), get_field_imm (inst));`
313			`if (info->print_address_func && info->symbol_at_address_func)`
314			`{`
315			`if (immfound)`
316			`immval \|= (get_int_field_imm (inst) & 0x0000ffff);`
317			`else`
318			`{`
319			`immval = get_int_field_imm (inst);`
320			`if (immval & 0x8000)`
321			`immval \|= 0xFFFF0000;`
322			`}`
323			`if (op->inst_offset_type == INST_PC_OFFSET)`
324			`immval += (int) memaddr;`
325			`if (info->symbol_at_address_func (immval, info))`
326			`{`
327			`fprintf (stream, "\t// ");`
328			`info->print_address_func (immval, info);`
329			`}`
330			`}`
331			`break;`
332			`case INST_TYPE_IMM:`
333			`fprintf (stream, "\t%s", get_field_imm (inst));`
334			`if (info->print_address_func && info->symbol_at_address_func`
335			`&& op->instr != imm)`
336			`{`
337			`if (immfound)`
338			`immval \|= (get_int_field_imm (inst) & 0x0000ffff);`
339			`else`
340			`{`
341			`immval = get_int_field_imm (inst);`
342			`if (immval & 0x8000)`
343			`immval \|= 0xFFFF0000;`
344			`}`
345			`if (op->inst_offset_type == INST_PC_OFFSET)`
346			`immval += (int) memaddr;`
347			`if (immval > 0 && info->symbol_at_address_func (immval, info))`
348			`{`
349			`fprintf (stream, "\t// ");`
350			`info->print_address_func (immval, info);`
351			`}`
352			`else if (op->inst_offset_type == INST_PC_OFFSET)`
353			`{`
354			`fprintf (stream, "\t\t// ");`
355			`fprintf (stream, "%x", immval);`
356			`}`
357			`}`
358			`break;`
359			`case INST_TYPE_RD_R2:`
360			`fprintf (stream, "\t%s, %s", get_field_rd (inst), get_field_r2 (inst));`
361			`break;`
362			`case INST_TYPE_R2:`
363			`fprintf (stream, "\t%s", get_field_r2 (inst));`
364			`break;`
365			`case INST_TYPE_R1:`
366			`fprintf (stream, "\t%s", get_field_r1 (inst));`
367			`break;`
368			`case INST_TYPE_RD_R1_SPECIAL:`
369			`fprintf (stream, "\t%s, %s", get_field_rd (inst), get_field_r2 (inst));`
370			`break;`
371			`case INST_TYPE_RD_IMM15:`
372			`fprintf (stream, "\t%s, %s", get_field_rd (inst), get_field_imm15 (inst));`
373			`break;`
374			`/* For tuqula instruction */`
375			`case INST_TYPE_RD:`
376			`fprintf (stream, "\t%s", get_field_rd (inst));`
377			`break;`
378			`case INST_TYPE_RFSL:`
379			`fprintf (stream, "\t%s", get_field_rfsl (inst));`
380			`break;`
381			`default:`
382			`/* If the disassembler lags the instruction set. */`
383			`fprintf (stream, "\tundecoded operands, inst is 0x%04x", inst);`
384			`break;`
385			`}`
386			`}`
387
388			`/* Say how many bytes we consumed. */`
389			`return 4;`
390			`}`
391			`#if 0`
392			`static enum microblaze_instr`
393			`get_insn_microblaze (long inst,`
394			`bfd_boolean *isunsignedimm,`
395			`enum microblaze_instr_type *insn_type,`
396			`short *delay_slots)`
397			`{`
398			`struct op_code_struct * op;`
399			`*isunsignedimm = FALSE;`
400
401			`/* Just a linear search of the table. */`
402			`for (op = opcodes; op->name != 0; op ++)`
403			`if (op->bit_sequence == (inst & op->opcode_mask))`
404			`break;`
405
406			`if (op->name == 0)`
407			`return invalid_inst;`
408			`else`
409			`{`
410			`*isunsignedimm = (op->inst_type == INST_TYPE_RD_R1_UNSIGNED_IMM);`
411			`*insn_type = op->instr_type;`
412			`*delay_slots = op->delay_slots;`
413			`return op->instr;`
414			`}`
415			`}`
416
417			`short`
418			`get_delay_slots_microblaze (long inst)`
419			`{`
420			`bfd_boolean isunsignedimm;`
421			`enum microblaze_instr_type insn_type;`
422			`enum microblaze_instr op;`
423			`short delay_slots;`
424
425			`op = get_insn_microblaze (inst, &isunsignedimm, &insn_type, &delay_slots);`
426			`if (op == invalid_inst)`
427			`return 0;`
428			`else`
429			`return delay_slots;`
430			`}`
431
432			`enum microblaze_instr`
433			`microblaze_decode_insn (long insn, int rd, int ra, int rb, int imm)`
434			`{`
435			`enum microblaze_instr op;`
436			`bfd_boolean t1;`
437			`enum microblaze_instr_type t2;`
438			`short t3;`
439
440			`op = get_insn_microblaze (insn, &t1, &t2, &t3);`
441			`*rd = (insn & RD_MASK) >> RD_LOW;`
442			`*ra = (insn & RA_MASK) >> RA_LOW;`
443			`*rb = (insn & RB_MASK) >> RB_LOW;`
444			`t3 = (insn & IMM_MASK) >> IMM_LOW;`
445			`*imm = (int) t3;`
446			`return (op);`
447			`}`
448
449			`unsigned long`
450			`microblaze_get_target_address (long inst, bfd_boolean immfound, int immval,`
451			`long pcval, long r1val, long r2val,`
452			`bfd_boolean *targetvalid,`
453			`bfd_boolean *unconditionalbranch)`
454			`{`
455			`struct op_code_struct * op;`
456			`long targetaddr = 0;`
457
458			`*unconditionalbranch = FALSE;`
459			`/* Just a linear search of the table. */`
460			`for (op = opcodes; op->name != 0; op ++)`
461			`if (op->bit_sequence == (inst & op->opcode_mask))`
462			`break;`
463
464			`if (op->name == 0)`
465			`{`
466			`*targetvalid = FALSE;`
467			`}`
468			`else if (op->instr_type == branch_inst)`
469			`{`
470			`switch (op->inst_type)`
471			`{`
472			`case INST_TYPE_R2:`
473			`*unconditionalbranch = TRUE;`
474			`/* Fall through. */`
475			`case INST_TYPE_RD_R2:`
476			`case INST_TYPE_R1_R2:`
477			`targetaddr = r2val;`
478			`*targetvalid = TRUE;`
479			`if (op->inst_offset_type == INST_PC_OFFSET)`
480			`targetaddr += pcval;`
481			`break;`
482			`case INST_TYPE_IMM:`
483			`*unconditionalbranch = TRUE;`
484			`/* Fall through. */`
485			`case INST_TYPE_RD_IMM:`
486			`case INST_TYPE_R1_IMM:`
487			`if (immfound)`
488			`{`
489			`targetaddr = (immval << 16) & 0xffff0000;`
490			`targetaddr \|= (get_int_field_imm (inst) & 0x0000ffff);`
491			`}`
492			`else`
493			`{`
494			`targetaddr = get_int_field_imm (inst);`
495			`if (targetaddr & 0x8000)`
496			`targetaddr \|= 0xFFFF0000;`
497			`}`
498			`if (op->inst_offset_type == INST_PC_OFFSET)`
499			`targetaddr += pcval;`
500			`*targetvalid = TRUE;`
501			`break;`
502			`default:`
503			`*targetvalid = FALSE;`
504			`break;`
505			`}`
506			`}`
507			`else if (op->instr_type == return_inst)`
508			`{`
509			`if (immfound)`
510			`{`
511			`targetaddr = (immval << 16) & 0xffff0000;`
512			`targetaddr \|= (get_int_field_imm (inst) & 0x0000ffff);`
513			`}`
514			`else`
515			`{`
516			`targetaddr = get_int_field_imm (inst);`
517			`if (targetaddr & 0x8000)`
518			`targetaddr \|= 0xFFFF0000;`
519			`}`
520			`targetaddr += r1val;`
521			`*targetvalid = TRUE;`
522			`}`
523			`else`
524			`*targetvalid = FALSE;`
525			`return targetaddr;`
526			`}`
527			`#endif`