include/opcode/

* mips.h (mips_operand_type): Add OP_ENTRY_EXIT_LIST and
	OP_SAVE_RESTORE_LIST.
	(decode_mips16_operand): Declare.

opcodes/
	* mips16-opc.c: Include mips-formats.h.
	(reg_0_map, reg_29_map, reg_31_map, reg_m16_map, reg32r_map): New
	static arrays.
	(decode_mips16_operand): New function.
	* mips-dis.c (mips16_to_32_reg_map, mips16_reg_names): Delete.
	(print_insn_arg): Handle OP_ENTRY_EXIT list.
	Abort for OP_SAVE_RESTORE_LIST.
	(print_mips16_insn_arg): Change interface.  Use mips_operand
	structures.  Delete GET_OP_S.  Move GET_OP definition to...
	(print_insn_mips16): ...here.  Call init_print_arg_state.
	Update the call to print_mips16_insn_arg.
This commit is contained in:
Richard Sandiford
2013-07-14 13:36:51 +00:00
parent ab90248154
commit c3c0747817
5 changed files with 338 additions and 456 deletions

View File

@ -1,3 +1,9 @@
2013-07-14 Richard Sandiford <rdsandiford@googlemail.com>
* mips.h (mips_operand_type): Add OP_ENTRY_EXIT_LIST and
OP_SAVE_RESTORE_LIST.
(decode_mips16_operand): Declare.
2013-07-14 Richard Sandiford <rdsandiford@googlemail.com> 2013-07-14 Richard Sandiford <rdsandiford@googlemail.com>
* mips.h (mips_operand_type, mips_reg_operand_type): New enums. * mips.h (mips_operand_type, mips_reg_operand_type): New enums.

View File

@ -375,6 +375,13 @@ enum mips_operand_type {
size determines whether the 16-bit or 32-bit encoding is required. */ size determines whether the 16-bit or 32-bit encoding is required. */
OP_LWM_SWM_LIST, OP_LWM_SWM_LIST,
/* The register list for an emulated MIPS16 ENTRY or EXIT instruction. */
OP_ENTRY_EXIT_LIST,
/* The register list and frame size for a MIPS16 SAVE or RESTORE
instruction. */
OP_SAVE_RESTORE_LIST,
/* A 10-bit field VVVVVNNNNN used for octobyte and quadhalf instructions: /* A 10-bit field VVVVVNNNNN used for octobyte and quadhalf instructions:
V Meaning V Meaning
@ -1680,6 +1687,7 @@ extern int bfd_mips_num_opcodes;
FP_D (never used) FP_D (never used)
*/ */
extern const struct mips_operand *decode_mips16_operand (char, bfd_boolean);
extern const struct mips_opcode mips16_opcodes[]; extern const struct mips_opcode mips16_opcodes[];
extern const int bfd_mips16_num_opcodes; extern const int bfd_mips16_num_opcodes;

View File

@ -1,3 +1,17 @@
2013-07-14 Richard Sandiford <rdsandiford@googlemail.com>
* mips16-opc.c: Include mips-formats.h.
(reg_0_map, reg_29_map, reg_31_map, reg_m16_map, reg32r_map): New
static arrays.
(decode_mips16_operand): New function.
* mips-dis.c (mips16_to_32_reg_map, mips16_reg_names): Delete.
(print_insn_arg): Handle OP_ENTRY_EXIT list.
Abort for OP_SAVE_RESTORE_LIST.
(print_mips16_insn_arg): Change interface. Use mips_operand
structures. Delete GET_OP_S. Move GET_OP definition to...
(print_insn_mips16): ...here. Call init_print_arg_state.
Update the call to print_mips16_insn_arg.
2013-07-14 Richard Sandiford <rdsandiford@googlemail.com> 2013-07-14 Richard Sandiford <rdsandiford@googlemail.com>
* mips-formats.h: New file. * mips-formats.h: New file.

View File

@ -51,15 +51,6 @@ struct mips_cp0sel_name
const char * const name; const char * const name;
}; };
/* The mips16 registers. */
static const unsigned int mips16_to_32_reg_map[] =
{
16, 17, 2, 3, 4, 5, 6, 7
};
#define mips16_reg_names(rn) mips_gpr_names[mips16_to_32_reg_map[rn]]
static const char * const mips_gpr_names_numeric[32] = static const char * const mips_gpr_names_numeric[32] =
{ {
"$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
@ -1128,6 +1119,54 @@ print_insn_arg (struct disassemble_info *info,
} }
break; break;
case OP_ENTRY_EXIT_LIST:
{
const char *sep;
unsigned int amask, smask;
sep = "";
amask = (uval >> 3) & 7;
if (amask > 0 && amask < 5)
{
infprintf (is, "%s", mips_gpr_names[4]);
if (amask > 1)
infprintf (is, "-%s", mips_gpr_names[amask + 3]);
sep = ",";
}
smask = (uval >> 1) & 3;
if (smask == 3)
{
infprintf (is, "%s??", sep);
sep = ",";
}
else if (smask > 0)
{
infprintf (is, "%s%s", sep, mips_gpr_names[16]);
if (smask > 1)
infprintf (is, "-%s", mips_gpr_names[smask + 15]);
sep = ",";
}
if (uval & 1)
{
infprintf (is, "%s%s", sep, mips_gpr_names[31]);
sep = ",";
}
if (amask == 5 || amask == 6)
{
infprintf (is, "%s%s", sep, mips_fpr_names[0]);
if (amask == 6)
infprintf (is, "-%s", mips_fpr_names[1]);
}
}
break;
case OP_SAVE_RESTORE_LIST:
/* Should be handled by the caller due to extend behavior. */
abort ();
case OP_MDMX_IMM_REG: case OP_MDMX_IMM_REG:
{ {
unsigned int vsel; unsigned int vsel;
@ -1351,22 +1390,22 @@ print_insn_mips (bfd_vma memaddr,
/* Disassemble an operand for a mips16 instruction. */ /* Disassemble an operand for a mips16 instruction. */
static void static void
print_mips16_insn_arg (char type, print_mips16_insn_arg (struct disassemble_info *info,
const struct mips_opcode *op, struct mips_print_arg_state *state,
int l, const struct mips_opcode *opcode,
bfd_boolean use_extend, char type, bfd_vma memaddr,
int extend, unsigned insn, bfd_boolean use_extend,
bfd_vma memaddr, unsigned extend, bfd_boolean is_offset)
struct disassemble_info *info)
{ {
const fprintf_ftype infprintf = info->fprintf_func; const fprintf_ftype infprintf = info->fprintf_func;
void *is = info->stream; void *is = info->stream;
const struct mips_operand *operand, *ext_operand;
unsigned int uval;
bfd_vma baseaddr;
if (!use_extend)
extend = 0;
#define GET_OP(insn, field) \
(((insn) >> MIPS16OP_SH_##field) & MIPS16OP_MASK_##field)
#define GET_OP_S(insn, field) \
((GET_OP (insn, field) ^ ((MIPS16OP_MASK_##field >> 1) + 1)) \
- ((MIPS16OP_MASK_##field >> 1) + 1))
switch (type) switch (type)
{ {
case ',': case ',':
@ -1375,457 +1414,159 @@ print_mips16_insn_arg (char type,
infprintf (is, "%c", type); infprintf (is, "%c", type);
break; break;
case 'y': default:
case 'w': operand = decode_mips16_operand (type, FALSE);
infprintf (is, "%s", mips16_reg_names (GET_OP (l, RY))); if (!operand)
break; {
/* xgettext:c-format */
infprintf (is, _("# internal error, undefined operand in `%s %s'"),
opcode->name, opcode->args);
return;
}
case 'x': if (operand->type == OP_SAVE_RESTORE_LIST)
case 'v': {
infprintf (is, "%s", mips16_reg_names (GET_OP (l, RX))); /* Handle this case here because of the complex interation
break; with the EXTEND opcode. */
unsigned int amask, nargs, nstatics, nsreg, smask, frame_size, i, j;
const char *sep;
case 'z': amask = extend & 0xf;
infprintf (is, "%s", mips16_reg_names (GET_OP (l, RZ))); if (amask == MIPS16_ALL_ARGS)
break; {
nargs = 4;
nstatics = 0;
}
else if (amask == MIPS16_ALL_STATICS)
{
nargs = 0;
nstatics = 4;
}
else
{
nargs = amask >> 2;
nstatics = amask & 3;
}
case 'Z': sep = "";
infprintf (is, "%s", mips16_reg_names (GET_OP (l, MOVE32Z))); if (nargs > 0)
break; {
infprintf (is, "%s", mips_gpr_names[4]);
if (nargs > 1)
infprintf (is, "-%s", mips_gpr_names[4 + nargs - 1]);
sep = ",";
}
case '0': frame_size = ((extend & 0xf0) | (insn & 0x0f)) * 8;
infprintf (is, "%s", mips_gpr_names[0]); if (frame_size == 0 && !use_extend)
break; frame_size = 128;
infprintf (is, "%s%d", sep, frame_size);
case 'S': if (insn & 0x40) /* $ra */
infprintf (is, "%s", mips_gpr_names[29]); infprintf (is, ",%s", mips_gpr_names[31]);
break;
case 'P': nsreg = (extend >> 8) & 0x7;
infprintf (is, "$pc"); smask = 0;
break; if (insn & 0x20) /* $s0 */
smask |= 1 << 0;
if (insn & 0x10) /* $s1 */
smask |= 1 << 1;
if (nsreg > 0) /* $s2-$s8 */
smask |= ((1 << nsreg) - 1) << 2;
case 'R': for (i = 0; i < 9; i++)
infprintf (is, "%s", mips_gpr_names[31]); if (smask & (1 << i))
break;
case 'X':
infprintf (is, "%s", mips_gpr_names[GET_OP (l, REGR32)]);
break;
case 'Y':
infprintf (is, "%s", mips_gpr_names[MIPS16OP_EXTRACT_REG32R (l)]);
break;
case '<':
case '>':
case '[':
case ']':
case '4':
case '5':
case 'H':
case 'W':
case 'D':
case 'j':
case '6':
case '8':
case 'V':
case 'C':
case 'U':
case 'k':
case 'K':
case 'p':
case 'q':
case 'A':
case 'B':
case 'E':
{
int immed, nbits, shift, signedp, extbits, pcrel, extu, branch;
shift = 0;
signedp = 0;
extbits = 16;
pcrel = 0;
extu = 0;
branch = 0;
switch (type)
{
case '<':
nbits = 3;
immed = GET_OP (l, RZ);
extbits = 5;
extu = 1;
break;
case '>':
nbits = 3;
immed = GET_OP (l, RX);
extbits = 5;
extu = 1;
break;
case '[':
nbits = 3;
immed = GET_OP (l, RZ);
extbits = 6;
extu = 1;
break;
case ']':
nbits = 3;
immed = GET_OP (l, RX);
extbits = 6;
extu = 1;
break;
case '4':
nbits = 4;
immed = GET_OP (l, IMM4);
signedp = 1;
extbits = 15;
break;
case '5':
nbits = 5;
immed = GET_OP (l, IMM5);
info->insn_type = dis_dref;
info->data_size = 1;
break;
case 'H':
nbits = 5;
shift = 1;
immed = GET_OP (l, IMM5);
info->insn_type = dis_dref;
info->data_size = 2;
break;
case 'W':
nbits = 5;
shift = 2;
immed = GET_OP (l, IMM5);
if ((op->pinfo & MIPS16_INSN_READ_PC) == 0
&& (op->pinfo & MIPS16_INSN_READ_SP) == 0)
{ {
info->insn_type = dis_dref; infprintf (is, ",%s", mips_gpr_names[i == 8 ? 30 : (16 + i)]);
info->data_size = 4; /* Skip over string of set bits. */
for (j = i; smask & (2 << j); j++)
continue;
if (j > i)
infprintf (is, "-%s", mips_gpr_names[j == 8 ? 30 : (16 + j)]);
i = j + 1;
} }
break; /* Statics $ax - $a3. */
case 'D': if (nstatics == 1)
nbits = 5; infprintf (is, ",%s", mips_gpr_names[7]);
shift = 3; else if (nstatics > 0)
immed = GET_OP (l, IMM5); infprintf (is, ",%s-%s",
info->insn_type = dis_dref; mips_gpr_names[7 - nstatics + 1],
info->data_size = 8; mips_gpr_names[7]);
break; break;
case 'j': }
nbits = 5;
immed = GET_OP (l, IMM5);
signedp = 1;
break;
case '6':
nbits = 6;
immed = GET_OP (l, IMM6);
break;
case '8':
nbits = 8;
immed = GET_OP (l, IMM8);
break;
case 'V':
nbits = 8;
shift = 2;
immed = GET_OP (l, IMM8);
/* FIXME: This might be lw, or it might be addiu to $sp or
$pc. We assume it's load. */
info->insn_type = dis_dref;
info->data_size = 4;
break;
case 'C':
nbits = 8;
shift = 3;
immed = GET_OP (l, IMM8);
info->insn_type = dis_dref;
info->data_size = 8;
break;
case 'U':
nbits = 8;
immed = GET_OP (l, IMM8);
extu = 1;
break;
case 'k':
nbits = 8;
immed = GET_OP (l, IMM8);
signedp = 1;
break;
case 'K':
nbits = 8;
shift = 3;
immed = GET_OP (l, IMM8);
signedp = 1;
break;
case 'p':
nbits = 8;
immed = GET_OP (l, IMM8);
signedp = 1;
pcrel = 1;
branch = 1;
break;
case 'q':
nbits = 11;
immed = GET_OP (l, IMM11);
signedp = 1;
pcrel = 1;
branch = 1;
break;
case 'A':
nbits = 8;
shift = 2;
immed = GET_OP (l, IMM8);
pcrel = 1;
/* FIXME: This can be lw or la. We assume it is lw. */
info->insn_type = dis_dref;
info->data_size = 4;
break;
case 'B':
nbits = 5;
shift = 3;
immed = GET_OP (l, IMM5);
pcrel = 1;
info->insn_type = dis_dref;
info->data_size = 8;
break;
case 'E':
nbits = 5;
shift = 2;
immed = GET_OP (l, IMM5);
pcrel = 1;
break;
default:
abort ();
}
if (! use_extend) if (is_offset && operand->type == OP_INT)
{ {
if (signedp && immed >= (1 << (nbits - 1))) const struct mips_int_operand *int_op;
immed -= 1 << nbits;
immed <<= shift;
if ((type == '<' || type == '>' || type == '[' || type == ']')
&& immed == 0)
immed = 8;
}
else
{
if (extbits == 16)
immed |= ((extend & 0x1f) << 11) | (extend & 0x7e0);
else if (extbits == 15)
immed |= ((extend & 0xf) << 11) | (extend & 0x7f0);
else
immed = ((extend >> 6) & 0x1f) | (extend & 0x20);
immed &= (1 << extbits) - 1;
if (! extu && immed >= (1 << (extbits - 1)))
immed -= 1 << extbits;
}
if (! pcrel) int_op = (const struct mips_int_operand *) operand;
infprintf (is, "%d", immed); info->insn_type = dis_dref;
else info->data_size = 1 << int_op->shift;
{ }
bfd_vma baseaddr;
if (branch) if (operand->size == 26)
{ /* In this case INSN is the first two bytes of the instruction
immed *= 2; and EXTEND is the second two bytes. */
baseaddr = memaddr + 2; uval = ((insn & 0x1f) << 21) | ((insn & 0x3e0) << 11) | extend;
} else
else if (use_extend) {
baseaddr = memaddr - 2; /* Calculate the full field value. */
else uval = mips_extract_operand (operand, insn);
{ if (use_extend)
int status; {
bfd_byte buffer[2]; ext_operand = decode_mips16_operand (type, TRUE);
if (ext_operand != operand)
{
operand = ext_operand;
if (operand->size == 16)
uval |= ((extend & 0x1f) << 11) | (extend & 0x7e0);
else if (operand->size == 15)
uval |= ((extend & 0xf) << 11) | (extend & 0x7f0);
else
uval = ((extend >> 6) & 0x1f) | (extend & 0x20);
}
}
}
baseaddr = memaddr; baseaddr = memaddr + 2;
if (operand->type == OP_PCREL)
{
const struct mips_pcrel_operand *pcrel_op;
/* If this instruction is in the delay slot of a jr pcrel_op = (const struct mips_pcrel_operand *) operand;
instruction, the base address is the address of the if (!pcrel_op->include_isa_bit && use_extend)
jr instruction. If it is in the delay slot of jalr baseaddr = memaddr - 2;
instruction, the base address is the address of the else if (!pcrel_op->include_isa_bit)
jalr instruction. This test is unreliable: we have {
no way of knowing whether the previous word is bfd_byte buffer[2];
instruction or data. */
status = (*info->read_memory_func) (memaddr - 4, buffer, 2, /* If this instruction is in the delay slot of a JR
info); instruction, the base address is the address of the
if (status == 0 JR instruction. If it is in the delay slot of a JALR
&& (((info->endian == BFD_ENDIAN_BIG instruction, the base address is the address of the
? bfd_getb16 (buffer) JALR instruction. This test is unreliable: we have
: bfd_getl16 (buffer)) no way of knowing whether the previous word is
& 0xf800) == 0x1800)) instruction or data. */
baseaddr = memaddr - 4; if (info->read_memory_func (memaddr - 4, buffer, 2, info) == 0
else && (((info->endian == BFD_ENDIAN_BIG
{ ? bfd_getb16 (buffer)
status = (*info->read_memory_func) (memaddr - 2, buffer, : bfd_getl16 (buffer))
2, info); & 0xf800) == 0x1800))
if (status == 0 baseaddr = memaddr - 4;
else if (info->read_memory_func (memaddr - 2, buffer, 2,
info) == 0
&& (((info->endian == BFD_ENDIAN_BIG && (((info->endian == BFD_ENDIAN_BIG
? bfd_getb16 (buffer) ? bfd_getb16 (buffer)
: bfd_getl16 (buffer)) : bfd_getl16 (buffer))
& 0xf81f) == 0xe800)) & 0xf81f) == 0xe800))
baseaddr = memaddr - 2; baseaddr = memaddr - 2;
} else
} baseaddr = memaddr;
info->target = (baseaddr & ~((1 << shift) - 1)) + immed; }
if (pcrel && branch }
&& info->flavour == bfd_target_unknown_flavour)
/* For gdb disassembler, maintain odd address. */ print_insn_arg (info, state, opcode, operand, baseaddr, uval);
info->target |= 1;
(*info->print_address_func) (info->target, info);
}
}
break; break;
case 'a':
case 'i':
{
if (! use_extend)
extend = 0;
l = ((l & 0x1f) << 23) | ((l & 0x3e0) << 13) | (extend << 2);
if (type == 'a' && info->flavour == bfd_target_unknown_flavour)
/* For gdb disassembler, maintain odd address. */
l |= 1;
}
info->target = ((memaddr + 4) & ~(bfd_vma) 0x0fffffff) | l;
(*info->print_address_func) (info->target, info);
break;
case 'l':
case 'L':
{
int need_comma, amask, smask;
need_comma = 0;
l = GET_OP (l, IMM6);
amask = (l >> 3) & 7;
if (amask > 0 && amask < 5)
{
infprintf (is, "%s", mips_gpr_names[4]);
if (amask > 1)
infprintf (is, "-%s", mips_gpr_names[amask + 3]);
need_comma = 1;
}
smask = (l >> 1) & 3;
if (smask == 3)
{
infprintf (is, "%s??", need_comma ? "," : "");
need_comma = 1;
}
else if (smask > 0)
{
infprintf (is, "%s%s", need_comma ? "," : "", mips_gpr_names[16]);
if (smask > 1)
infprintf (is, "-%s", mips_gpr_names[smask + 15]);
need_comma = 1;
}
if (l & 1)
{
infprintf (is, "%s%s", need_comma ? "," : "", mips_gpr_names[31]);
need_comma = 1;
}
if (amask == 5 || amask == 6)
{
infprintf (is, "%s$f0", need_comma ? "," : "");
if (amask == 6)
infprintf (is, "-$f1");
}
}
break;
case 'm':
case 'M':
/* MIPS16e save/restore. */
{
int need_comma = 0;
int amask, args, statics;
int nsreg, smask;
int framesz;
int i, j;
l = l & 0x7f;
if (use_extend)
l |= extend << 16;
amask = (l >> 16) & 0xf;
if (amask == MIPS16_ALL_ARGS)
{
args = 4;
statics = 0;
}
else if (amask == MIPS16_ALL_STATICS)
{
args = 0;
statics = 4;
}
else
{
args = amask >> 2;
statics = amask & 3;
}
if (args > 0) {
infprintf (is, "%s", mips_gpr_names[4]);
if (args > 1)
infprintf (is, "-%s", mips_gpr_names[4 + args - 1]);
need_comma = 1;
}
framesz = (((l >> 16) & 0xf0) | (l & 0x0f)) * 8;
if (framesz == 0 && !use_extend)
framesz = 128;
infprintf (is, "%s%d", need_comma ? "," : "", framesz);
if (l & 0x40) /* $ra */
infprintf (is, ",%s", mips_gpr_names[31]);
nsreg = (l >> 24) & 0x7;
smask = 0;
if (l & 0x20) /* $s0 */
smask |= 1 << 0;
if (l & 0x10) /* $s1 */
smask |= 1 << 1;
if (nsreg > 0) /* $s2-$s8 */
smask |= ((1 << nsreg) - 1) << 2;
/* Find first set static reg bit. */
for (i = 0; i < 9; i++)
{
if (smask & (1 << i))
{
infprintf (is, ",%s", mips_gpr_names[i == 8 ? 30 : (16 + i)]);
/* Skip over string of set bits. */
for (j = i; smask & (2 << j); j++)
continue;
if (j > i)
infprintf (is, "-%s", mips_gpr_names[j == 8 ? 30 : (16 + j)]);
i = j + 1;
}
}
/* Statics $ax - $a3. */
if (statics == 1)
infprintf (is, ",%s", mips_gpr_names[7]);
else if (statics > 0)
infprintf (is, ",%s-%s",
mips_gpr_names[7 - statics + 1],
mips_gpr_names[7]);
}
break;
default:
/* xgettext:c-format */
infprintf (is,
_("# internal disassembler error, "
"unrecognised modifier (%c)"),
type);
abort ();
} }
} }
@ -1859,6 +1600,7 @@ print_insn_mips16 (bfd_vma memaddr, struct disassemble_info *info)
bfd_boolean use_extend; bfd_boolean use_extend;
int extend = 0; int extend = 0;
const struct mips_opcode *op, *opend; const struct mips_opcode *op, *opend;
struct mips_print_arg_state state;
void *is = info->stream; void *is = info->stream;
info->bytes_per_chunk = 2; info->bytes_per_chunk = 2;
@ -1869,6 +1611,8 @@ print_insn_mips16 (bfd_vma memaddr, struct disassemble_info *info)
info->target = 0; info->target = 0;
info->target2 = 0; info->target2 = 0;
#define GET_OP(insn, field) \
(((insn) >> MIPS16OP_SH_##field) & MIPS16OP_MASK_##field)
/* Decode PLT entry's GOT slot address word. */ /* Decode PLT entry's GOT slot address word. */
if (is_mips16_plt_tail (info, memaddr)) if (is_mips16_plt_tail (info, memaddr))
{ {
@ -1979,6 +1723,7 @@ print_insn_mips16 (bfd_vma memaddr, struct disassemble_info *info)
if (op->args[0] != '\0') if (op->args[0] != '\0')
infprintf (is, "\t"); infprintf (is, "\t");
init_print_arg_state (&state);
for (s = op->args; *s != '\0'; s++) for (s = op->args; *s != '\0'; s++)
{ {
if (*s == ',' if (*s == ','
@ -1997,8 +1742,8 @@ print_insn_mips16 (bfd_vma memaddr, struct disassemble_info *info)
++s; ++s;
continue; continue;
} }
print_mips16_insn_arg (*s, op, insn, use_extend, extend, memaddr, print_mips16_insn_arg (info, &state, op, *s, memaddr, insn,
info); use_extend, extend, s[1] == '(');
} }
/* Figure out branch instruction type and delay slot information. */ /* Figure out branch instruction type and delay slot information. */
@ -2018,7 +1763,6 @@ print_insn_mips16 (bfd_vma memaddr, struct disassemble_info *info)
return length; return length;
} }
} }
#undef GET_OP_S
#undef GET_OP #undef GET_OP
if (use_extend) if (use_extend)

View File

@ -23,6 +23,116 @@
#include "sysdep.h" #include "sysdep.h"
#include <stdio.h> #include <stdio.h>
#include "opcode/mips.h" #include "opcode/mips.h"
#include "mips-formats.h"
static unsigned char reg_0_map[] = { 0 };
static unsigned char reg_29_map[] = { 29 };
static unsigned char reg_31_map[] = { 31 };
static unsigned char reg_m16_map[] = { 16, 17, 2, 3, 4, 5, 6, 7 };
static unsigned char reg32r_map[] = {
0, 8, 16, 24,
1, 9, 17, 25,
2, 10, 18, 26,
3, 11, 19, 27,
4, 12, 20, 28,
5, 13, 21, 29,
6, 14, 22, 30,
7, 15, 23, 31
};
/* Return the meaning of operand character TYPE, or null if it isn't
recognized. If the operand is affected by the EXTEND instruction,
EXTENDED_P selects between the extended and unextended forms.
The extended forms all have an lsb of 0. */
const struct mips_operand *
decode_mips16_operand (char type, bfd_boolean extended_p)
{
switch (type)
{
case '0': MAPPED_REG (0, 0, GP, reg_0_map);
case 'L': SPECIAL (6, 5, ENTRY_EXIT_LIST);
case 'M': SPECIAL (7, 0, SAVE_RESTORE_LIST);
case 'P': SPECIAL (0, 0, PC);
case 'R': MAPPED_REG (0, 0, GP, reg_31_map);
case 'S': MAPPED_REG (0, 0, GP, reg_29_map);
case 'X': REG (5, 0, GP);
case 'Y': MAPPED_REG (5, 3, GP, reg32r_map);
case 'Z': MAPPED_REG (3, 0, GP, reg_m16_map);
case 'a': JUMP (26, 0, 2);
case 'e': UINT (11, 0);
case 'i': JALX (26, 0, 2);
case 'l': SPECIAL (6, 5, ENTRY_EXIT_LIST);
case 'm': SPECIAL (7, 0, SAVE_RESTORE_LIST);
case 'v': MAPPED_REG (3, 8, GP, reg_m16_map);
case 'w': MAPPED_REG (3, 5, GP, reg_m16_map);
case 'x': MAPPED_REG (3, 8, GP, reg_m16_map);
case 'y': MAPPED_REG (3, 5, GP, reg_m16_map);
case 'z': MAPPED_REG (3, 2, GP, reg_m16_map);
}
if (extended_p)
switch (type)
{
case '<': UINT (5, 0);
case '>': UINT (5, 0);
case '[': UINT (6, 0);
case ']': UINT (6, 0);
case '4': SINT (15, 0);
case '5': SINT (16, 0);
case '6': SINT (16, 0);
case '8': SINT (16, 0);
case 'A': PCREL (16, 0, 2, 0, TRUE, FALSE, FALSE);
case 'B': PCREL (16, 0, 3, 0, TRUE, FALSE, FALSE);
case 'C': SINT (16, 0);
case 'D': SINT (16, 0);
case 'E': PCREL (16, 0, 2, 0, TRUE, FALSE, FALSE);
case 'H': SINT (16, 0);
case 'K': SINT (16, 0);
case 'U': UINT (16, 0);
case 'V': SINT (16, 0);
case 'W': SINT (16, 0);
case 'j': SINT (16, 0);
case 'k': SINT (16, 0);
case 'p': BRANCH (16, 0, 1);
case 'q': BRANCH (16, 0, 1);
}
else
switch (type)
{
case '<': INT_ADJ (3, 2, 8, 0, FALSE);
case '>': INT_ADJ (3, 8, 8, 0, FALSE);
case '[': INT_ADJ (3, 2, 8, 0, FALSE);
case ']': INT_ADJ (3, 8, 8, 0, FALSE);
case '4': SINT (4, 0);
case '5': UINT (5, 0);
case '6': UINT (6, 5);
case '8': UINT (8, 0);
case 'A': PCREL (8, 0, 2, 2, FALSE, FALSE, FALSE);
case 'B': PCREL (5, 0, 3, 3, FALSE, FALSE, FALSE);
case 'C': INT_ADJ (8, 0, 255, 3, FALSE); /* (0 .. 255) << 3 */
case 'D': INT_ADJ (5, 0, 31, 3, FALSE); /* (0 .. 31) << 3 */
case 'E': PCREL (5, 0, 2, 2, FALSE, FALSE, FALSE);
case 'H': INT_ADJ (5, 0, 31, 1, FALSE); /* (0 .. 31) << 1 */
case 'K': INT_ADJ (8, 0, 127, 3, FALSE); /* (-128 .. 127) << 3 */
case 'U': UINT (8, 0);
case 'V': INT_ADJ (8, 0, 255, 2, FALSE); /* (0 .. 255) << 2 */
case 'W': INT_ADJ (5, 0, 31, 2, FALSE); /* (0 .. 31) << 2 */
case 'j': SINT (5, 0);
case 'k': SINT (8, 0);
case 'p': BRANCH (8, 0, 1);
case 'q': BRANCH (11, 0, 1);
}
return 0;
}
/* This is the opcodes table for the mips16 processor. The format of /* This is the opcodes table for the mips16 processor. The format of
this table is intentionally identical to the one in mips-opc.c. this table is intentionally identical to the one in mips-opc.c.