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NetBSD/gnu/dist/gdb6/opcodes/ia64-dis.c
nathanw 76ae6db36e Import GDB 6.4
2006-05-15 14:11:08 +00:00

274 lines
7.7 KiB
C
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/* ia64-dis.c -- Disassemble ia64 instructions
Copyright 1998, 1999, 2000, 2002 Free Software Foundation, Inc.
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
This file is part of GDB, GAS, and the GNU binutils.
GDB, GAS, and the GNU binutils are free software; you can redistribute
them and/or modify them under the terms of the GNU General Public
License as published by the Free Software Foundation; either version
2, or (at your option) any later version.
GDB, GAS, and the GNU binutils are distributed in the hope that they
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 <assert.h>
#include <string.h>
#include "dis-asm.h"
#include "opcode/ia64.h"
#define NELEMS(a) ((int) (sizeof (a) / sizeof (a[0])))
/* Disassemble ia64 instruction. */
/* Return the instruction type for OPCODE found in unit UNIT. */
static enum ia64_insn_type
unit_to_type (ia64_insn opcode, enum ia64_unit unit)
{
enum ia64_insn_type type;
int op;
op = IA64_OP (opcode);
if (op >= 8 && (unit == IA64_UNIT_I || unit == IA64_UNIT_M))
{
type = IA64_TYPE_A;
}
else
{
switch (unit)
{
case IA64_UNIT_I:
type = IA64_TYPE_I; break;
case IA64_UNIT_M:
type = IA64_TYPE_M; break;
case IA64_UNIT_B:
type = IA64_TYPE_B; break;
case IA64_UNIT_F:
type = IA64_TYPE_F; break;
case IA64_UNIT_L:
case IA64_UNIT_X:
type = IA64_TYPE_X; break;
default:
type = -1;
}
}
return type;
}
int
print_insn_ia64 (bfd_vma memaddr, struct disassemble_info *info)
{
ia64_insn t0, t1, slot[3], template, s_bit, insn;
int slotnum, j, status, need_comma, retval, slot_multiplier;
const struct ia64_operand *odesc;
const struct ia64_opcode *idesc;
const char *err, *str, *tname;
BFD_HOST_U_64_BIT value;
bfd_byte bundle[16];
enum ia64_unit unit;
char regname[16];
if (info->bytes_per_line == 0)
info->bytes_per_line = 6;
info->display_endian = info->endian;
slot_multiplier = info->bytes_per_line;
retval = slot_multiplier;
slotnum = (((long) memaddr) & 0xf) / slot_multiplier;
if (slotnum > 2)
return -1;
memaddr -= (memaddr & 0xf);
status = (*info->read_memory_func) (memaddr, bundle, sizeof (bundle), info);
if (status != 0)
{
(*info->memory_error_func) (status, memaddr, info);
return -1;
}
/* bundles are always in little-endian byte order */
t0 = bfd_getl64 (bundle);
t1 = bfd_getl64 (bundle + 8);
s_bit = t0 & 1;
template = (t0 >> 1) & 0xf;
slot[0] = (t0 >> 5) & 0x1ffffffffffLL;
slot[1] = ((t0 >> 46) & 0x3ffff) | ((t1 & 0x7fffff) << 18);
slot[2] = (t1 >> 23) & 0x1ffffffffffLL;
tname = ia64_templ_desc[template].name;
if (slotnum == 0)
(*info->fprintf_func) (info->stream, "[%s] ", tname);
else
(*info->fprintf_func) (info->stream, " ");
unit = ia64_templ_desc[template].exec_unit[slotnum];
if (template == 2 && slotnum == 1)
{
/* skip L slot in MLI template: */
slotnum = 2;
retval += slot_multiplier;
}
insn = slot[slotnum];
if (unit == IA64_UNIT_NIL)
goto decoding_failed;
idesc = ia64_dis_opcode (insn, unit_to_type (insn, unit));
if (idesc == NULL)
goto decoding_failed;
/* print predicate, if any: */
if ((idesc->flags & IA64_OPCODE_NO_PRED)
|| (insn & 0x3f) == 0)
(*info->fprintf_func) (info->stream, " ");
else
(*info->fprintf_func) (info->stream, "(p%02d) ", (int)(insn & 0x3f));
/* now the actual instruction: */
(*info->fprintf_func) (info->stream, "%s", idesc->name);
if (idesc->operands[0])
(*info->fprintf_func) (info->stream, " ");
need_comma = 0;
for (j = 0; j < NELEMS (idesc->operands) && idesc->operands[j]; ++j)
{
odesc = elf64_ia64_operands + idesc->operands[j];
if (need_comma)
(*info->fprintf_func) (info->stream, ",");
if (odesc - elf64_ia64_operands == IA64_OPND_IMMU64)
{
/* special case of 64 bit immediate load: */
value = ((insn >> 13) & 0x7f) | (((insn >> 27) & 0x1ff) << 7)
| (((insn >> 22) & 0x1f) << 16) | (((insn >> 21) & 0x1) << 21)
| (slot[1] << 22) | (((insn >> 36) & 0x1) << 63);
}
else if (odesc - elf64_ia64_operands == IA64_OPND_IMMU62)
{
/* 62-bit immediate for nop.x/break.x */
value = ((slot[1] & 0x1ffffffffffLL) << 21)
| (((insn >> 36) & 0x1) << 20)
| ((insn >> 6) & 0xfffff);
}
else if (odesc - elf64_ia64_operands == IA64_OPND_TGT64)
{
/* 60-bit immediate for long branches. */
value = (((insn >> 13) & 0xfffff)
| (((insn >> 36) & 1) << 59)
| (((slot[1] >> 2) & 0x7fffffffffLL) << 20)) << 4;
}
else
{
err = (*odesc->extract) (odesc, insn, &value);
if (err)
{
(*info->fprintf_func) (info->stream, "%s", err);
goto done;
}
}
switch (odesc->class)
{
case IA64_OPND_CLASS_CST:
(*info->fprintf_func) (info->stream, "%s", odesc->str);
break;
case IA64_OPND_CLASS_REG:
if (odesc->str[0] == 'a' && odesc->str[1] == 'r')
{
switch (value)
{
case 0: case 1: case 2: case 3:
case 4: case 5: case 6: case 7:
sprintf (regname, "ar.k%u", (unsigned int) value);
break;
case 16: strcpy (regname, "ar.rsc"); break;
case 17: strcpy (regname, "ar.bsp"); break;
case 18: strcpy (regname, "ar.bspstore"); break;
case 19: strcpy (regname, "ar.rnat"); break;
case 32: strcpy (regname, "ar.ccv"); break;
case 36: strcpy (regname, "ar.unat"); break;
case 40: strcpy (regname, "ar.fpsr"); break;
case 44: strcpy (regname, "ar.itc"); break;
case 64: strcpy (regname, "ar.pfs"); break;
case 65: strcpy (regname, "ar.lc"); break;
case 66: strcpy (regname, "ar.ec"); break;
default:
sprintf (regname, "ar%u", (unsigned int) value);
break;
}
(*info->fprintf_func) (info->stream, "%s", regname);
}
else
(*info->fprintf_func) (info->stream, "%s%d", odesc->str, (int)value);
break;
case IA64_OPND_CLASS_IND:
(*info->fprintf_func) (info->stream, "%s[r%d]", odesc->str, (int)value);
break;
case IA64_OPND_CLASS_ABS:
str = 0;
if (odesc - elf64_ia64_operands == IA64_OPND_MBTYPE4)
switch (value)
{
case 0x0: str = "@brcst"; break;
case 0x8: str = "@mix"; break;
case 0x9: str = "@shuf"; break;
case 0xa: str = "@alt"; break;
case 0xb: str = "@rev"; break;
}
if (str)
(*info->fprintf_func) (info->stream, "%s", str);
else if (odesc->flags & IA64_OPND_FLAG_DECIMAL_SIGNED)
(*info->fprintf_func) (info->stream, "%lld", (long long) value);
else if (odesc->flags & IA64_OPND_FLAG_DECIMAL_UNSIGNED)
(*info->fprintf_func) (info->stream, "%llu", (long long) value);
else
(*info->fprintf_func) (info->stream, "0x%llx", (long long) value);
break;
case IA64_OPND_CLASS_REL:
(*info->print_address_func) (memaddr + value, info);
break;
}
need_comma = 1;
if (j + 1 == idesc->num_outputs)
{
(*info->fprintf_func) (info->stream, "=");
need_comma = 0;
}
}
if (slotnum + 1 == ia64_templ_desc[template].group_boundary
|| ((slotnum == 2) && s_bit))
(*info->fprintf_func) (info->stream, ";;");
done:
ia64_free_opcode ((struct ia64_opcode *)idesc);
failed:
if (slotnum == 2)
retval += 16 - 3*slot_multiplier;
return retval;
decoding_failed:
(*info->fprintf_func) (info->stream, " data8 %#011llx", (long long) insn);
goto failed;
}
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