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[/] [openrisc/] [trunk/] [gnu-stable/] [gdb-7.2/] [opcodes/] [microblaze-dis.c] - Blame information for rev 865

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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 "dis-asm.h"
#include <strings.h>
#include "microblaze-opc.h"
#include "microblaze-dis.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       print_func = 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)
    print_func (stream, ".short 0x%04x", inst);
  else
    {
      print_func (stream, "%s", op->name);
 
      switch (op->inst_type)
        {
        case INST_TYPE_RD_R1_R2:
          print_func (stream, "\t%s, %s, %s", get_field_rd (inst),
                   get_field_r1(inst), get_field_r2 (inst));
          break;
        case INST_TYPE_RD_R1_IMM:
          print_func (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))
                {
                  print_func (stream, "\t// ");
                  info->print_address_func (immval, info);
                }
            }
          break;
        case INST_TYPE_RD_R1_IMM5:
          print_func (stream, "\t%s, %s, %s", get_field_rd (inst),
                   get_field_r1(inst), get_field_imm5 (inst));
          break;
        case INST_TYPE_RD_RFSL:
          print_func (stream, "\t%s, %s", get_field_rd (inst), get_field_rfsl (inst));
          break;
        case INST_TYPE_R1_RFSL:
          print_func (stream, "\t%s, %s", get_field_r1 (inst), get_field_rfsl (inst));
          break;
        case INST_TYPE_RD_SPECIAL:
          print_func (stream, "\t%s, %s", get_field_rd (inst),
                   get_field_special (inst, op));
          break;
        case INST_TYPE_SPECIAL_R1:
          print_func (stream, "\t%s, %s", get_field_special (inst, op),
                   get_field_r1(inst));
          break;
        case INST_TYPE_RD_R1:
          print_func (stream, "\t%s, %s", get_field_rd (inst), get_field_r1 (inst));
          break;
        case INST_TYPE_R1_R2:
          print_func (stream, "\t%s, %s", get_field_r1 (inst), get_field_r2 (inst));
          break;
        case INST_TYPE_R1_IMM:
          print_func (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))
                {
                  print_func (stream, "\t// ");
                  info->print_address_func (immval, info);
                }
              else
                {
                  print_func (stream, "\t\t// ");
                  print_func (stream, "%x", immval);
                }
            }
          break;
        case INST_TYPE_RD_IMM:
          print_func (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))
              {
                print_func (stream, "\t// ");
                info->print_address_func (immval, info);
              }
            }
          break;
        case INST_TYPE_IMM:
          print_func (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))
                {
                  print_func (stream, "\t// ");
                  info->print_address_func (immval, info);
                }
              else if (op->inst_offset_type == INST_PC_OFFSET)
                {
                  print_func (stream, "\t\t// ");
                  print_func (stream, "%x", immval);
                }
            }
          break;
        case INST_TYPE_RD_R2:
          print_func (stream, "\t%s, %s", get_field_rd (inst), get_field_r2 (inst));
          break;
        case INST_TYPE_R2:
          print_func (stream, "\t%s", get_field_r2 (inst));
          break;
        case INST_TYPE_R1:
          print_func (stream, "\t%s", get_field_r1 (inst));
          break;
        case INST_TYPE_RD_R1_SPECIAL:
          print_func (stream, "\t%s, %s", get_field_rd (inst), get_field_r2 (inst));
          break;
        case INST_TYPE_RD_IMM15:
          print_func (stream, "\t%s, %s", get_field_rd (inst), get_field_imm15 (inst));
          break;
        /* For tuqula instruction */
        case INST_TYPE_RD:
          print_func (stream, "\t%s", get_field_rd (inst));
          break;
        case INST_TYPE_RFSL:
          print_func (stream, "\t%s", get_field_rfsl (inst));
          break;
        default:
          /* If the disassembler lags the instruction set.  */
          print_func (stream, "\tundecoded operands, inst is 0x%04x", inst);
          break;
        }
    }
 
  /* Say how many bytes we consumed.  */
  return 4;
}
 
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;
    }
}
 
enum microblaze_instr
microblaze_decode_insn (long insn, int *rd, int *ra, int *rb, int *immed)
{
  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;
  *immed = (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;
}

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[/] [openrisc/] [trunk/] [gnu-stable/] [gdb-7.2/] [opcodes/] [microblaze-dis.c] - Blame information for rev 865

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